Manual debitmetru UDM200.pdf

7/22/2019 Manual debitmetru UDM200.pdf

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Mess- und OrtungstechnikMeasuring and Locating Technologies

LeitungsortungLine Locating

RohrleitungsnetzeWater Networks

KommunikationsnetzeCommunication Networks

ElektrizittsnetzePower Networks

Operating manual

Ultrasound flow measuring deviceUDM 200

Issue: 1 (05/2008)


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Consultation with SebaKMT

The present system manual has been designed as an operating guide and for reference. It ismeant to answer your questions and solve your problems in as fast and easy a way aspossible. Please start with referring to this manual should any trouble occur.

In doing so, make use of the table of contents and read the relevant paragraph with great

attention. Furthermore, check all terminals and connections of the instruments involved.Should any question remain unanswered, please contact:

Seba Dynatronic

Mess- und Ortungstechnik GmbH

Hagenuk KMT

Kabelmesstechnik GmbH

Dr.-Herbert-Iann-Str. 6D - 96148 Baunach

Phone: +49 / 9544 / 68 0Fax: +49 / 9544 / 22 73

Rderaue 41D - 01471 Radeburg / Dresden

Phone: +49 / 35208 / 84 0Fax: +49 / 35208 / 84 249

E-Mail: [email protected]

http://www.sebakmt.com

SebaKMT

All rights reserved. No part of this handbook may be copied by photographic or other means unless SebaKMThave before-hand declared their consent in writing. The content of this handbook is subject to change withoutnotice. SebaKMT cannot be made liable for technical or printing errors or shortcomings of this handbook.SebaKMT also disclaim all responsibilityfor damage resulting directly or indirectly from the delivery, supply, or use of this matter.


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Terms of Warranty

SebaKMT accept responsibility for a claim under warranty brought forward by a customer fora product sold by SebaKMT under the terms stated below.

SebaKMT warrant that at the time of delivery SebaKMT products are free from

manufacturing or material defects which might considerably reduce their value or usability.This warranty does not apply to faults in the software supplied. During the period of warranty,SebaKMT agree to repair faulty parts or replace them with new parts or parts as new (withthe same usability and life as new parts) according to their choice.

SebaKMT reject all further claims under warranty, in particular those from consequentialdamage. Each component and product replaced in accordance with this warranty becomesthe property of SebaKMT.

All warranty claims versus SebaKMT are hereby limited to a period of 12 months from thedate of delivery. Each component supplied by SebaKMT within the context of warranty willalso be covered by this warranty for the remaining period of time but for 90 days at least.

Each measure to remedy a claim under warranty shall exclusively be carried out by

SebaKMT or an authorized service station.To register a claim under the provisions of this warranty, the customer has to complain aboutthe defect, in case of an immediately detectable fault within 10 days from the date of delivery.

This warranty does not apply to any fault or damage caused by exposing a product toconditions not in accordance with this specification, by storing, transporting, or using itimproperly, or having it serviced or installed by a workshop not authorized by SebaKMT. Allresponsibility is disclaimed for damage due to wear, will of God, or connection to foreigncomponents.

For damage resulting from a violation of their duty to repair or re-supply items, SebaKMT canbe made liable only in case of severe negligence or intention. Any liability for slightnegligence is disclaimed.


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Contents

1 General Details....................................................................................................9

2 Quickstart..........................................................................................................10

3 Applications ......................................................................................................13

4 Measuring Principle..........................................................................................13

5 Handling of UDM 200........................................................................................14

5.1Control Panel and Handling..........................................................................................14

5.2Display ..........................................................................................................................15

5.3Plugs.............................................................................................................................15

5.4Sensors.........................................................................................................................15

5.5Battery Indicator............................................................................................................15

5.6Charging the Battery.....................................................................................................16

5.7Battery Care..................................................................................................................16

5.8Cleaning........................................................................................................................16

5.9Maintenance ................................................................................................................. 16

6 Menu Structure Overview.................................................................................17

7 General Measuring Process.............................................................................19

7.1Selection of the Measuring Point .................................................................................. 197.2Acoustic Penetration.....................................................................................................19

7.3Undisturbed Flow Profile...............................................................................................20

7.4Measuring Points to be Avoided ................................................................................... 22

7.5Input of the Pipe Parameters / Menu PAR....................................................................23

7.5.1 Outer Pipe Diameter / Pipe Circumference ..................................................................... 237.5.2 Pipe Wall Thickness ........................................................................................................ 237.5.3 Pipe Material.................................................................................................................... 247.5.4 Pipe Lining ....................................................................................................................... 257.5.5 Pipe Roughness .............................................................................................................. 25

7.6Input of the Medium Parameters...................................................................................26

7.6.1 Sound Velocity................................................................................................................. 267.6.2 Kinematic Viscosity.......................................................................................................... 267.6.3 Density............................................................................................................................. 277.6.4 Medium Temperature ...................................................................................................... 277.6.5 Cable Length.................................................................................................................... 27

7.7Realize Measurement / Menu MEA .............................................................................. 28

7.7.1 Assign a Number to Measuring Point.............................................................................. 287.7.2 Define Number of Sound Paths....................................................................................... 29

7.8Mounting and Positioning the Transducer ....................................................................30

7.8.1 Transducer Distance........................................................................................................ 30

7.8.2 Mounting the Transducers............................................................................................... 317.8.3 Mounting the transducers with transducer shoes and chains ......................................... 317.8.4 Lengthening the Fastening Chain.................................................................................... 32


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7.8.5 Fine Adjustment of the Transducer Distance .................................................................. 327.8.6 Start of Measurement ...................................................................................................... 33

7.9Recognition of Flow Direction ....................................................................................... 33

7.10 Stopping of Measurement......................................................................................33

8 Displaying the Measured Values / Menu OPT ................................................34

8.1Selection of the Physical Quantity and of the Unit of Measurement........................... 34

8.2Display Setting..............................................................................................................35

8.3Transducer Distance.....................................................................................................35

8.4Storage and Output of Measured Data.........................................................................36

8.4.1 Storing Measured Data.................................................................................................... 368.4.2 Output to a PC via Serial Interface .................................................................................. 378.4.3 Measured Data Memory during Measurement................................................................ 378.4.4 Offline Output of Measured Values ................................................................................. 378.4.5 Saving the Counter.......................................................................................................... 38

8.4.6 Storing the Signal Amplitude ........................................................................................... 388.4.7 Storing the Sound Velocity of the Medium ...................................................................... 38

9 Advanced Measuring Functions......................................................................39

9.1Command Execution during Measurement...................................................................39

9.2Damping Factor ............................................................................................................ 39

9.3Totalizers ...................................................................................................................... 40

9.3.1 Store the Totalizer Value ................................................................................................. 409.3.2 Overflow of the Totalizers................................................................................................ 40

9.4Upper Limit of the Flow Velocity ................................................................................... 41

9.5Cut-off Flow...................................................................................................................419.6Uncorrected Flow Velocity ............................................................................................42

9.7Change of Limit for the Inner Pipe Diameter.................................................................43

9.8Protection code for unwanted interruption ....................................................................43

9.8.1 Intervention in the Measurement ..................................................................................... 449.8.2 Deactivation of a Program Code...................................................................................... 44

9.9Measuring the Sound Velocity of the Medium ..............................................................45

9.9.1 Displayed Information...................................................................................................... 46

10 Output ................................................................................................................47

10.1 Activation ............................................................................................................... 47

10.1.1 Output Range................................................................................................................... 4810.1.2 Error Output ..................................................................................................................... 4910.1.3 Function Test ................................................................................................................... 50

10.2 Error Value Delay...................................................................................................51

10.3 Activation of an Analog Output .............................................................................. 52

10.3.1 Measuring Range of the Analog Outputs ........................................................................ 52

10.4 Activation of a Pulse Output...................................................................................53

10.5 Activation of an Alarm Output ................................................................................ 53

10.5.1 Alarm Properties .............................................................................................................. 54

10.5.2 Setting the Limits ............................................................................................................. 5510.5.3 Defining the Hysteresis.................................................................................................... 56


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10.6 Behaviour of the Alarm Outputs.............................................................................56

10.6.1 Apparent Switching Delay................................................................................................ 5610.6.2 Reset and Initialization of the Alarms .............................................................................. 5610.6.3 Storage of Alarm Outputs ................................................................................................ 5610.6.4 Alarm Outputs during Transducer Positioning................................................................. 5610.6.5 Alarm Outputs during Measurement................................................................................ 5710.6.6 Alarm State Indication...................................................................................................... 58

10.7 Deactivation of the Outputs....................................................................................58

11 Settings and Special Functions/ Menu SF......................................................59

11.1 Language Change (HotCode)................................................................................59

11.2 Time and Date ....................................................................................................... 60

11.3 Dialoges and Menus ..............................................................................................61

11.3.1 Pipe Circumference ......................................................................................................... 6111.3.2 Measuring Point Number Indication ................................................................................ 62

11.3.3

Display of the lastly entered Transducer Distance .......................................................... 62

11.3.4 Error Value Delay ............................................................................................................ 6211.3.5 Alarm State Indication...................................................................................................... 62

11.4 Measurement Settings...........................................................................................63

11.5 Configuring Serial Data Transfer ........................................................................... 64

11.6 Contrast ................................................................................................................. 64

11.7 Instrument Information...........................................................................................64

11.8 Printing Measured Values......................................................................................65

11.9 Deleting Measured Values.....................................................................................65

12 SuperUser Mode ...............................................................................................66

12.1 Activating/Deactivating...........................................................................................66

12.2 Malfunctions in SuperUser Mode...........................................................................66

13 Libraries.............................................................................................................67

13.1 Editing the Selection Lists......................................................................................67

13.1.1 Displaying a Selection List............................................................................................... 6813.1.2 Adding a Material or Medium to the List .......................................................................... 6813.1.3 Removing a Material or Medium from the List................................................................. 6913.1.4 Removing all Materials or Media from the List ................................................................ 69

13.1.5 Adding all Materials or Media to the List.......................................................................... 6913.2 Defining New Materials or Media ........................................................................... 70

13.2.1 Partitioning the User Memory.......................................................................................... 7013.2.2 Extended Library Function............................................................................................... 7213.2.3 Entering Material or Medium Properties without Using the Extended Library................ 7313.2.4 Entering Material Properties Using the Extended Library ............................................... 7413.2.5 Entering Medium Properties Using the Extended Library ............................................... 7613.2.6 Deleting a User-Defined Material or Medium .................................................................. 77

14 PC Software.......................................................................................................78

14.1 Symbols in the Menu Bar.......................................................................................78

14.2 Connecting to the UDM 200...................................................................................79

14.3 Downloading Data..................................................................................................80


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14.4 Changing the Software Language ......................................................................... 82

14.5 Additional Software Options...................................................................................82

15 Troubleshooting ...............................................................................................83

15.1 Problems with the Measurement ........................................................................... 8415.2 Correct Selection of the Measuring Point ..............................................................85

15.3 Maximum Acoustic Contact ................................................................................... 85

15.4 Application Specific Problems................................................................................86

15.5 High Measuring Deviations.................................................................................... 86

15.6 Problems with the Totalizers..................................................................................87

16 Technical Data ..................................................................................................88

17 Appendix ...........................................................................................................89

17.1 Serial Output Format..............................................................................................8917.2 Hyperterminal Transfer Parameters.......................................................................90

17.3 Sound Velocity of Selected Pipe and Lining Materials at 20 C.............................90

17.4 Typical Roughness Coefficients of Pipes...............................................................91

17.5 Properties of Water at 1 bar and at Saturation Pressure ....................................... 92


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1 General DetailsThe UDM 200 is a high precision measuring tool. Please handle with care. To assure a long life pleasepay attention to the following points:

- Read this manual completely and follow all the details.- Prevent the UDM 200 from crushes and tumbles.- Keep the transducers clean.- Dont bend or squeeze the cables of the transducers.- Dont expose the cabels to great heat.- Dont use damaged cables.- Pay attention to the units degree of protection.- Not at all open the unit on your own authority.- Connect the battery recharger correctly.

This manual is written for the user of the UDM 200. It contains important information about this unit.Therefore please read the manual and keep it carefully.Despite of all care there may be mistakes in it. Please advise us of such failures.

The UDM 200 is subject to continuous improvement. Therefore there may be certain variationsbetween the manual and the unit. If you have any question, please contact SebaKMT.We reserve to accomplish technical changes without preceding information.


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2 QuickstartYou should have the following data down pat, before you begin:Pipe data:

- Outer diameter or pipe circumference

- Wall thickness (make use of tables of the producer or use a thickness gauge on site)- Material- Surface condition of the pipe (lining, roughness)- Approximate temperature of the medium

By the help of keys and you change the values of the menus. Complete every single action

by pressing ENTER.

Set up parameters

Activate UDM 200.

Press the keys till PARis marked in the Display.Press ENTER.

Enter the following values below..Manage the input with keys:

Outer diameter [mm]

Wall thickness [mm](make use of tables of the producer or use a thickness gauge onsite)

Material: set the preferred material by the use of key .

If there is a lining, its material, condition and thickness have tobe entered, too. Therefore please read this manual carefully.When there is no lining choose no and continue by pressingthe Enter-key

Roughness of the pipe. Choose the roughness from the table inthe Annex


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Medium: water

Approximate temperature of the medium.

Additional cable. Leave this value on 0.0m.

MeasuringSelect MEAby the help of the arrow keys and press ENTER.

OPTIONAL:Enter measuring points:enter any comment by the help of thearrow keys.

Set sound path: Please leave the proposed value, if possible!!!

Transducer distance: Set the distance of the transducers on thestraight edge. Set the transducers on the pipe and fix them,using their clamping chains. There has to be enough couplantgel on the transducers. There must not be air betweentransducers and pipe.

UDM 200 displays the intensity of the transmitted signal.

Please see that the signal is stable!

Confirm once more the transducer distance.

UDM 200 starts measurement.


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During measurement By pressing the keys further values can be displayed:

Total volume and present flow

Reflow and present reflow

Free memory of the unit

Mode: Transient Time

Distance between the transducers set at the moment

S1, Q1 c R F

Quit measurement

Adjust transducers

Clear totalized volume

Flow velocity


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3 ApplicationsThis UDM 200 can be used wherever both the pipe wall and the medium to be measured are sound-permeable. This applies to pipe walls made of homogeneous material and to media with a low solid orgas content. Because ultrasonic waves can also penetrate solids, the sensors can be fixed to theoutside of the pipe, which means the measurement requires no intervention. The measurements areindependent of the electrical parameters of the medium such as conductivity and the dielectricconstant.

4 Measuring PrincipleThe UDM uses ultrasonic signals for the flow measurement of a medium, employing the so-calledtransit time method.Because the medium in which the signals propagate is flowing, the transit time of the sound signalspropagating in the direction of flow is shorter than the transit time of the signal propagating against thedirection of flow.The transit-time difference t is measured and allows the determination of the average flow velocity onthe propagation path of the ultrasonic signals. A flow profile correction is then performed in order to

obtain the area average of the flow velocity, which is proportional to the volume flow.


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5 Handling of UDM 200

5.1 Control Panel and HandlingUse the several keys to navigate through the menus of UDM 200.

General functions

BREAK:Deletes the selection or change and returns to main menu.

RESET: Press these three keys at the same Time to resolve amalfunction. This reset equals a restart of the unit. Stored data arenot affected.

INIT (cold start): Press these both keys during turn-on procedure toinitialize UDM 200 new. Most of the parameters and settings arereset to factory defaults. Memory contents are not affected.

ENTER:Confirms the selection or the input.

Horizontal selection

Selects the nearest point on the right.

Selects the nearest point on the left.

Vertical selection

Scrolls forwards.

Scrolls backwards.

Input of figures and values

Moves the Cursor to the right.

Scrolls through the symbol set.

Move the cursor to the left.

If the cursor is situated on the left side:

- an even treated value will be reset to the previously stored value

- a not treated value will be deleted.There is an error message, if the entered value is invalid.Press any key and enter a correct value.

Input of text

Moves the cursor to the right.

Scrolls to the next symbol within the symbol set.

Resets all symbols to the last entry.


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5.6 Charging the BatteryThe UDM 200 has a state-of-the-art lithium-ion battery. To charge the UDM 200, use the charger unitsupplied.Switch on the device. The green LED with the power symbol flashes to indicate that the device isbeing charged. The green LED lights up constantly when the device is fully charged.

5.7 Battery CareThe UDM 200 has state-of-the-art lithium-ion batteries. This type of battery does not suffer from thememory effect. Over time, however, frequent charging of only partially discharged batteries can leadto the battery power not being correctly indicated.To synchronise this, completely discharge the battery (by simply switching the device to test mode)and then charge it again. Perform this action at least twice. Afterwards, the charge level should becorrectly indicated.

5.8 Cleaning

Use a soft cloth to clean the device. Do not use cleaning agents. Wipe off any residue of contact pasteusing a soft paper tissue.

5.9 MaintenanceNo maintenance is required. Always observe the instructions and precautions in the manual. If theUDM 200 is correctly installed at a suitable location in accordance with the recommendations in thismanual, properly used and taken care of, no malfunctions are to be expected.


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6 Menu Structure OverviewMenu overview

Level 1 Level 2 Level 3 Level 4 /settings Section

PAR: Parameter Pipe and medium settings 7.5

Outer diameter 7.5.1

Wall thickness 7.5.2

Pipe material Material selection 7.5.3

Other material c-Material(see addition)

7.5.3

Lining Lining material: 7.5.4

Thickness of lining 7.5.4

Roughness 7.5.5

Medium Water 7.6

Sea water

Other medium c-Medium min 7.6.1

c-Medium max

Kin. viscosity 7.6.2

Density 7.6.3

Medium temperature 7.6.4

Add. Cable 7.6.5

MEA: Measurement Steps along measuring operation 7.7

Measuring point Nr. 7.7.1

Way of sound 7.7.2

Transducer distance 7.8.5

OPT: Output options Setting of all relevant output options (measuring quantity,measuring unit, etc.)

8

Measuring quantity Volume flow Volume in: [selectmeasuring unit]

8.1

Flow velocity Velocity in: [selectmeasuring unit]

8.1

Mass flow Mass in: [selectmeasuring unit]

8.1

Sound velocity 8.1

Damping 9.2

Store measuring dataNo/Yes

8.4.1

Serial output No/Yes Storage rate Extra: [selection inseconds]

8.4.2

Every second

Every 10 seconds

Every minute

Every 10 minutes

Every 30 minutes

Every hour

Current loop No/Yes Measuring quantities Absolut/Sign 10.3

Measuring range:begin

Measuring range: end


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Alarm output No/Yes R1=Funk Select function 10.5

R1= Type Hold

Non-Hold

R1= Mode NC CONT

NO CONT

Limits

SF: Special Functions Functions, that are not directly related to measurement

System settings Set clock 11.2

Libraries Material list 13

Media list 13

Format User-Area 13

Extended library 13

Dialogs/Menus Pipe circumference 11.3

Measuring point 11.3.2

Transducerdistance

11.3.3

Error-val. Delay 11.3.4

Schow relais stat. 11.3.5

Measurement Compare c-Fluid

Flow velocity. 9.4

Cut-off flow 9.5

Velocity Limit 9.4

Quant. Wrapping 9.3.2

Quantitiy recall 9.3.1

Process outputs Install Output 10

Storage Ringbuffer 8.4

Storage mode 8.4.1

Storing measureddata

0

Store Amplitude 8.4.6

Store c-Medium 8.4.7

Serial transmission Kill Spaces 11.5

Decimalpoint

Col-Separat.

Miscellaneus Input HotCode

(change language)

11.1

Contrast 11.6

Unit-Info 11.7

Print 11.8

Delete measuringquantities

11.9

Programming-Code 9.8

Install. Material 13

Install. Medium 13


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7 General Measuring Process

7.1 Selection of the Measuring PointThe correct selection of the measuring point is crucial for achieving reliable measurement results and

a high accuracy. A measurement must take place on a pipe

where the sound can propagate and

where a fully developed rotationally symmetrical flow profile exists.

The correct transducer positioning is an essential condition for error-free measurement. It guaranteesthat the sound signal will be received under optimum conditions and evaluated correctly.

Because of the variety of applications and the different factors influencing the measurement, there canbe no standard solution for the transducer positioning. The correct position of the transducers will beinfluenced by the following factors:

diameter, material, lining, wall thickness and form of the pipe

medium

presence of gas bubbles in the medium

Avoid measuring points in the vicinity of deformations and defects of the pipe and in the vicinity ofweldings.

Avoid locations where deposits are building in the pipe. Make sure that the ambient temperature at theselected location is within the operating temperature range of the transducers (see annex TechnicalData).

7.2 Acoustic PenetrationIt must be possible to penetrate the pipe with acoustic signals at the measuring point. The acousticpenetration is reached when pipe and medium do not attenuate the sound signal so strongly that it is

completely absorbed before reaching the second transducer. The attenuation of pipe and mediumdepends on:

kinematic viscosity of the medium

proportion of gas bubbles and solids in the medium

deposits on the inner pipe wall

pipe material

The following conditions have to be respected at the measuring point:

the pipe is always filled completely

no solid deposits are building

no bubbles accumulate (even bubble-free media can form gas pockets when the medium expands,e.g. before pumps and after great cross-section extensions)


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7.3 Undisturbed Flow ProfileMany flow elements (elbows, slide valves, valves, control valves, pumps, reducers, diffusers, etc.)cause a distortion of the flow profile. The axisymmetrical flow profile needed for correct measurementis no longer given. A careful selection of the measuring point helps to reduce the impact of disturbancesources.

It is most important that the measuring point is chosen at a sufficient distance from anydisturbance source. Only then it can be assumed that the flow profile in the pipe is fullydeveloped.

However, UDM-200 will give you significant measuring results even under non-ideal measuringconditions if: e.g. a medium contains a certain proportion of gas bubbles or solids or

the recommended distances to disturbance sources can not be observed for practical reasons.

Recommended straight inlet and outlet pipe lengths are given for different types of flow disturbancesources in the examples in the table below.

Correct selection of a measuring point:Disturbance source:90-bend

Inlet Outlet

L 10 D L 5 D

Disturbance source: 2 x 90- bend on the same level

Inlet OutletL 25 D L 5 D

Disturbance source:2 x 90- bend on various levels

Inlet Outlet

L 40 D L 5 D


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Disturbance source:T-fitting

Inlet Outlet

L 50 D L 10 D

Disturbance source:Widening

Inlet Outlet

L 30 D L 5 D

Disturbance source: ConstrictionInlet Outlet

L 10 D L 5 D

Disturbance source:Valve

Inlet Outlet

L 40 D L 10 D

Disturbance source:Pump

Inlet

L 50 D


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7.4 Measuring Points to be AvoidedTry to avoid the following measuring points:

near deformed or damaged pipe sections

near welding seams where deposits are bonded within the pipe

Observe the instructions contained in the following table:

Horizontal pipeline:

Select a measuring point where the transducers can be mounted on the side of the pipe, so thatthe sound waves propagate horizontally in the pipe. Thus, solids deposited on the bottom of thepipe and the gas pockets developing at the top will not influence the propagation of the signal.

right wrong

Free In- or Outlet:

Locate the measuring point, where the pipe cannot drain.

right unfavourable

right unfavourable

Vertical pipeline:

Locate the measuring point, where fluid rises. The pipe has to be completely filled.

right wrong


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7.5 Input of the Pipe Parameters / Menu PARAfter the measuring point has been selected, the pipe and medium parameters can be entered.

The ranges are limited by the characteristics of the transducers and of the flowmeter. An errormessage will be displayed if the limits are exceeded (MINIMUM and MAXIMUM plausibility check).

Note: The parameters will be stored only if the program branch

PARAMETER is finished completely once.

Select the program branch PARAMETER.

Press ENTER.

7.5.1 Outer Pipe Diameter / Pipe CircumferenceEnter the outer pipe diameter.

Press ENTER.

If the entered outer diameter is > 1000 mm, noreflection measurement can be performed.

It is possible to enter the pipe circumference instead of the outer pipe diameter. The setting is coldstart resistant. It will be activated in the program branch SPECIAL FUNCTION.

If the input of the pipe circumference has been activated and 0 (zero) is entered for the OUTER

DIAMETER, the menu item PIPE CIRCUMFER. will be displayed automatically. If the pipecircumference is not to be entered, press key BRKto return to the main menu and start the parameterinput again.

7.5.2 Pipe Wall Thickness

Enter the pipe wall thickness. The range depends onthe connected transducers. Default is 3.0 mm.

Press ENTER.

To get the wall thickness refer to the data sheet of the pipe manufacturer or use a device to measurethe wall thickness like the UWD 200.

Note: The inner diameter (= outer diameter - 2x pipe wall thickness)

will be calculated internally. If the value is not within the

inner pipe diameter range of the connected transducers, an error

message will be displayed. It is possible to change the lower

limit of the inner pipe diameter for a given transducer type (see

section 9.7).


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7.5.3 Pipe MaterialThe pipe material has to be selected to determine the sound velocity. The sound velocities for thematerials in the scroll list are stored in the device. After the pipe material has been selected, theUDM 200 automatically selects the appropriate sound velocity.

Select the pipe material from the scroll list.If the material is not in the scroll list, selectOTHER MATERIAL.

Press ENTER.

Note: One can configure which materials are available in the selection

lists (see section 13.1)

If OTHER MATERIALis selected, the sound velocity hasto be entered.

Enter the sound velocity of the pipe material. Valuesbetween 600.0 m/s and 6553.5 m/s will be accepted.

Press ENTER.

(For the sound velocity of some materials see theannex)

Note: Enter the sound velocity of the material (i.e. longitudinal or

transversal velocity) which is nearer to 2500 m/s.


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7.5.4 Pipe Lining

If the pipe has an inner lining, select YES.

Press ENTER.

If NOis selected, the next parameter will be displayed.

Select the medium from the scroll list. If the material isnot in the scroll list, select OTHER MATERIAL.

Press ENTER.


lists (see section 13.1).

If OTHER MATERIALis selected, the sound velocity has to be

entered.

Enter the sound velocity of the pipe material. Values between600.0 m/s and 6553.5 m/s will be accepted. Press ENTER.

(For the sound velocity of some materials see the annex)

Enter the thickness of the liner. Default is 3.0 mm.

Press ENTER.

Note: The inner diameter (= outer diameter - 2x pipe wall thickness -

2x liner thickness) will be calculated internally. If the value

is not within the inner pipe diameter range of the connected

transducers, an error message will be displayed.

7.5.5 Pipe RoughnessThe flow profile of the medium is influenced by the roughness of the inner pipe wall. The roughnesswill be used for the calculation of the profile correction factors. As the pipe roughness can not beexactly determined in most cases, it has to be estimated. For the roughness of some materials see theannex. The values are based on experience and measurements.

Enter the roughnessfor the selected pipe or lining material.Values between 0.0 mm and 5.0 mm will be accepted.Default is 0.1 mm.

Press ENTER.


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7.6 Input of the Medium ParametersAfter the pipe parameters have been entered, the UDM 200 asks for the medium parameters.Since the UDM 200 is designed to fit to the needs of water suppliers, only water and seawater areavailable as predefined mediums. But other mediums can be also measured be selecting OTHER

MEDIUM. In this case, the following parameters have to be entered:

min. and max. sound velocity, kinematic viscosity of the medium,

density of the medium (only if the output option MASS FLOWis activated)

temperature of the medium

Select the medium from the scroll list.If the medium isnot in the scroll list, select OTHER MEDIUM.

Press ENTER.

If a medium is selected from the scroll list, the menu item for the input of the medium temperature willbe displayed directly.

If OTHER MEDIUM. has been selected, the parameters listed above have to be entered first.


lists (see section 13.1).

7.6.1 Sound VelocityThe sound velocity of the medium is used for the calculation of the transducer distance at the

beginning of the measurement. However, the sound velocity does not influence the measuring resultdirectly. Often, the exact value of the sound velocity for a given medium is unknown. A range ofpossible values for the sound velocity must therefore be entered.

Enter the min. and max. sound velocity of the medium.Values between 800.0 m/s and 3500.0 m/s will beaccepted.

Press ENTERafter each input.

7.6.2 Kinematic ViscosityThe kinematic viscosity influences the flow profile of the medium.UDM 200 uses the entered value of

the kinematic viscosity as well as further parameters for a profile correction.

Enter the kinematic viscosity of the medium. Valuesbetween 0.01 mm2/s and 30 000.00 mm

2/s will be

accepted.

Press ENTER.


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7.6.3 DensityThe density of the medium has to be entered. The mass flow will be calculated on the basis of thedensity (product of volume flow and density).

Note:If the mass flow is not measured, press ENTER.

Other measuring results will not be influenced.

Enter the operating density of the medium.

Values between 0.10 g/cm3and 20.00 g/cm

3will be

accepted.

Press ENTER.

7.6.4 Medium TemperatureUDM 200 uses the medium temperature to calculate the distance between the transducers(recommended distance at begin of measurement).

Enter the medium temperature. The value must bewithin the operating temperature range of thetransducers.

Default is 20 C. Press ENTER..

Note: The range of possible medium temperatures depends on the

operating range of the chosen transducers.

7.6.5 Cable Length

If the transducer cable has to be extended, enter theadditional cable length (not the entire cable length).Press ENTER.

The sensors of the UDM 200 are already equipped with5m cables If you dont use an additional cableextension, leave this value on 0.


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7.7 Realize Measurement / Menu MEA

Select program branch MEASURINGin the main menu.

Press ENTER.

If this error message is displayed, please enter themissing parameters in program branch PARAMETER.

7.7.1 Assign a Number to Measuring PointAt first you can assign a number and a comment to the measuring point.

Enter values by using the keys

.

Parameter !


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7.7.2 Define Number of Sound PathsThe sound path is the number of the transits of the ultrasonic waves through the medium in the pipe. Asound path number of "0" makes no sense.

At an oddnumber of transits (diagonal mode), the transducers will be mounted on opposite sides ofthe pipe (see figure below).

At an evennumber of transits (reflection mode), the transducers will be mounted on the same sides ofthe pipe (see figure below).

An increased number of transits mean increased accuracy of the measurement. However, theincreased transit distance leads to a higher attenuation of the signal. The reflections on the oppositepipe wall and deposits on the inner pipe wall cause additional amplitude losses of the sound signal .Ifthe signal is attenuated strongly by the medium, the pipe, deposits, etc., the number of sound pathshas to be set to 1 if necessary.

Arrangement of the transducers in diagonalmode

Arrangement of the transducers in reflection mode

Number of soundpaths

Sound path Number ofsound paths

Sound path

1 2

3 4

and so on

Note: Correct positioning of the transducer is easier for an even

number of transit paths than for an odd number.

A value for the number of sound paths corresponding to the connected transducers and the enteredparameters will be recommended.

Change the value if necessary.

Press ENTER.


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7.8 Mounting and Positioning the Transducer

7.8.1 Transducer Distance

REFLEC - reflection mode

DIAGON - diagonal mode

A value for the transducer distance will be recommended.

The transducer distance given here is the distance between theinner edges of the transducer. A negative transducer distanceis possible for a measurement in diagonal mode on very smallpipes, how the following illustration shows:

Note: The accuracy of the recommended transducer distance depends on

the accuracy of the pipe and medium parameters entered.


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7.8.2 Mounting the Transducers

Fasten the transducers the way that the engravingsform an arrow.

Note: Rust, paint or other deposits on the pipe will absorb the soundsignal. Clean the pipe at the transducer positions. Remove rust or

loose paint. An existing paint layer on the pipe should be sanded for

a better measuring result.

Use coupling foil or apply a bead of acoustic coupling compound alongthe center line onto the contact surface of the transducer.

There should be no air pockets between transducer contact surface andpipe wall.

7.8.3 Mounting the transducers with transducer shoes and chains Plug the sensors into the connector shoes. Turn the screw on the top of the connector shoe by 90

so that the end of it latches into the groove of the sensor and holds it in place.

Push the guide rule into the side slot on the rails. Align the sensor distance as recommended forthe UDM 200 and block the sensors using the small plastic screws on sensor cable side of theconnector shoes.

-60 0 0302010mm 80706050 110 1201090 330320

Place the connector shoe and guide rule at the test point on the pipe.

Push the last ball of the chain into the slot on the top of the connector shoe.

Pay the chain around the pipe (if the chain is not long enough, see the next section).

Note: If the sensors were fastened to a vertical pipe and the UDM 200 is

lower than the pipe, we recommend laying the cable of the upper sensor

below the tensioning belt to protect it from mechanical strain.

Tighten the chain and insert it into the second slot in the connector shoe.

Fasten the other sensor in the same way.


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7.8.4 Lengthening the Fastening ChainTo lengthen the chain, push the last ball of the extension into the clamp on the ball chain. The spareclamps supplied with the chain can be used for repairing a broken chain.

7.8.5 Fine Adjustment of the Transducer Distance

If the transducers are armed, press ENTERto confirmthe transducer distance. The measuring operation isstarted.

A bar graph S=displays the amplitude of the receivedsignal.

Shift the transducer slightly until the bar graph has max.length and is also stable.

By scrolling with key through the upper line and with

key through the lower line

transducer distance

bar graph Q=(signal quality)

transit time TRANS.in microseconds

bar graph S=(signal amplitude)can be displayed.

If the signal quality is not sufficient for measurement,

Q=UNDEFwill be displayed.After the precise positioning of the transducers, therecommended transducer distance is displayed again.

Enter the actual (precise) transducer distance andpress ENTERor simply confirm the displayed value bypressing ENTER.

Note: The UDM 200 is able to display the latest entered precise

transducer distance.


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7.8.6 Start of MeasurementAs soon as the precise transducer distance has been entered, the measuring process startsautomatically.

You can return to the bar graph by pressing ENTER.

The results are displayed according to the actually selected output options (see chapter 8). By defaultthe volume flow in m

3/h is displayed. The selection of the values to be displayed and the setting of the

output options are described in chapter 8. Advanced measuring functions are described in chapter 9.

7.9 Recognition of Flow DirectionThe flow direction in the pipe can be recognized with the help of the displayed volume

flow in conjunction with the arrow engraved on the transducers:The medium flows in arrow direction if the displayed volume flow is positive (e.g. 54.5 m

3/h).

The medium flows against the arrow direction if the displayed volume flow is negative (e.g. -54.5 m3/h).

7.10 Stopping of MeasurementThe measurement can be interrupted at any time by pressing key BRK.

Attention! Be careful not to interrupt a current measurement by inadvertently

pressing key BRK!


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8 Displaying the Measured Values / Menu OPTThe physical quantity will be set in the program branch OUTPUT OPTIONS (see section 8.1).The designation of the physical quantity will be displayed normally in the upper line, its value in thelower line. The display can be adapted according to your needs.

8.1 Selection of the Physical Quantity and of theUnit of Measurement

The following physical quantities can be measured:

flow velocity

volume flow

mass flow

For the sound velocity measurement, no unit has to be selected.

The flow velocity is directly measured. The volume flow will be calculated by multiplying the flowvelocity by the cross-section of the pipe. The mass flow will be calculated by multiplying the volumeflow by the density of the medium

Select the program branch OUTPUT OPTIONS.

Select the required physical quantity in the scroll list.

Press ENTER.

For the selected physical quantity, a scroll list with theavailable units of measurement is displayed. Thepreviously selected unit of measurement is displayedfirst.Select the unit of measurement for the selectedphysical quantity. Press ENTER.

You can return to the main menu by pressing key BRK. The further menu items of the program branchOUTPUT OPTIONSare for the activation of the measured value output.


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8.2 Display SettingDuring measurement, the display can be set as to display two measured values simultaneously (onein each line of the display (standard settings)). The display can be adapted to your requirements. Themodification does not influence the current measurement.

The following information can be displayed in the upper line:

designation of the actually measured and stored physical quantity

totalizer values (if activated) date and point in time, when the memory will be full measuring mode

transducer distance (see the following section) alarm state indication, if activated (see chapter 10) and if alarm outputs are activated

The following information can be displayed in the lower line:

flow velocity mass flow

volume flow

The display in the upper line can be changed during measurement with key .

The display in the lower line can be changed during measurement with key .

The character * indicates that the displayed value(here: flow velocity) is not the selected physical quantity(here: volume flow).

8.3 Transducer Distance

By pressing key it is possible during measurementto scroll to the display of the transducer distance.The current optimum transducer distance is displayed inparentheses (here: 51.2 mm), followed by the enteredtransducer distance (here: 50.8 mm).The optimum transducer distance might change duringmeasurement (e.g. due to temperature fluctuations).A possible deviation from the optimum transducerdistance (here: -0.4 mm) will be compensated internally.

Attention! Never change the transducer distance during measurement!


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8.4 Storage and Output of Measured DataThe following data can be stored or transmitted to a PC during a measurement:

Date Time

Measuring point number Pipe parameters Medium parameters

Transducer parameters Sound path (reflection or diagonal) Transducer distance

Damping value Storage rate Measurand Unit

Measured values

The stored data can be transmitted to a PC at a later point in time (offline output).

Note: The UDM 200 can store up to 100 series of measured values. The

number of measured values that can be generated depends on the

total number of values stored in the previous series.

If all the values stored in the device are deleted and a new test

is started with only one parameter +on a test channel without

mass storage, up to 27,000 readings can be stored in this new

series.

8.4.1 Storing Measured Data

During the selection of the output options (OUTPUT OPTIONSbranch), it can be specified whether ornot and in which rate, the measured data shall be stored during the measurement.

Select Yesto activate the storage of measured data.

Press ENTER.

Select a storage rate. If the required storage rate isnot available, select EXTRAand specify a customstorage rate between 1 and 43200 (12 hours) seconds.

Press ENTER.


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8.4.2 Output to a PC via Serial Interface

In order to activate the direct transmission of the measured data to a PC (connected via serialinterface), select the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING and press

ENTER.

Select YESto activate the serial output to the PC.

Press ENTER.

If no storage rate is selected, the standard rate or thelast selected rate is used.

Select a storage rate. If the required storage rate isnot available, select EXTRAand specify a customstorage rate between 1 and 43200 seconds (12 hours).

Press ENTER.

Note: To send the data directly to the PC, open a terminal program

(e.g. Windows Hyperterminal). Set the following connection

parameters: baud rate 9600, data bits: 8, stop bits: 2, parity:

even, flow control: hardware. Open the connection before you

continue on the UDM 200

8.4.3 Measured Data Memory during MeasurementWhen testing with the activated memory function, a message appears as soon as the memory isfull. Press ENTERto acknowledge the message. The main menu is displayed.

Note: The UDM 200 interrupts the measurement as soon as the internal

memory is full if no output option other than saving was

selected.

If another output option (e.g. serial output) was selected, the

UDM 200 continues the measurement. Only the saving of measured

data is stopped. The error display appears at regular intervals.

To delete the memory, go to the Special functions menu.

8.4.4 Offline Output of Measured Values

With offline output, the measured values in the memory are output. The data can then betransferred:

- To a printer connected to the serial interface of the UDM 200- To a terminal program (e.g. Windows Hyperterminal)- To a special program that displays the data of the UDM 200


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8.4.5 Saving the CounterIt is possible to only save the value of the displayed counter, or a value for each flow direction. Thissetting is not affected by cold starts. Select the option Quantity Storageunder

SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING.

If you select ONE,the UDM 200 only saves the displayed counter. If you select BOTH,thecounters ofboth flow directions are saved. Press ENTERto confirm.

Note: The UDM 200 only saves the counter if it is activated and the

data storage function is enabled. Storing a counter reduces the

total number of measured values that can be saved by about two

thirds.

Example: In the SPECIAL FUNCTION menu, the UDM 200 shows that 10,000 more measuredvalues can be saved. If the counters are activated and only once counter is saved, 3,333 data fieldsare available. If both counters are saved, 2,000 data saving operations can be performed.

8.4.6 Storing the Signal AmplitudeSelect the option Store Amplitude under the branch

SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING.

Select ON, if you want the signal amplitude to bestored in addition to the measured data.

Press ENTER.

8.4.7 Storing the Sound Velocity of the MediumSelect the option c-Medium under the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \

STORING.

Select ON, if you want the sound velocity to be storedin addition to the measured data.

Press ENTER.


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9 Advanced Measuring Functions

9.1 Command Execution during MeasurementCommands executable during a measurement are shown in the upper line. A command always begins

with "". Scroll in the upper line with key until the needed command is displayed. Press ENTER.Depending on the instrumentation a program code might be needed.

The following commands are available:

COMMAND EXPLANATION

ADJUST TRANSDUCERS

Switch over to the operation mode transducer positioning. If a

program code is active, the current measurement will beautomatically continued 8 seconds after the last keyboard entry.

CLEAR TOTALIZER

The totalizers will be reset to zero.

BREAK MEASURE Stop measuring and return to main menu. If a program code isactive, at first the six-figure BREAK-CODE has to be entered

9.2 Damping FactorEach displayed measured value is the floating average of all measured values of the last x seconds,where x is the damping factor. A damping factor of 1 s means that the measured values are notaveraged as the measuring rate is approx 1/s. The default value of 10 s is appropriate for normal flowconditions. Strongly fluctuating values caused by high flow dynamics require a larger damping factor.Select the program branch OUTPUT OPTIONS. Press ENTER until the menu item DAMPING isdisplayed.

Enter the damping factor.Values between 1 s and 100 s will be accepted.

Press ENTER.

You can return to the main menu by pressing key BRK.


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9.3 TotalizersTotal volume or mass of the medium at the measuring point can be determined.

There are two totalizers, one for the positive flow direction, one for the negative flow direction.

The unit of measurement used for totalization corresponds to the volume or mass unitselected for the physical quantity (see section 8.1).

The value of a totalizer consists of max. 11 digits, including max. 3 decimal places.

Scroll in the upper line with key to display the

totalizers.Press ENTERwhile a totalizer is displayed to togglebetween the display of the totalizers for both flowdirections.

Select the command CLEAR TOTALIZER in the upper line to reset the totalizers to zero.Press ENTER.

Note: Flow velocities cannot be totalized.

9.3.1 Store the Totalizer ValueThe behavior of the totalizers after an interruption of the measurement or after a RESET of theflowmeter will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING. The setting iscold start resistant.

Select option QUANTITY RECALLin the listMEASURING.

If you select ON, the values of the totalizers will bestored and used for the next measurement If you selectOFF, the totalizers will be reset to zero.

9.3.2 Overflow of the TotalizersThere are two different modes the totalizers can work in:

Without overflow: The value of the totalizer increases to the internal limit of 1038.The values will be displayed as exponential numbers (1.00000E10), if necessary.The totalizer can only be reset to zero manually.

With overflow: The totalizer will be reset to zero automatically as soon as 9999999999 isreached.

Independently of the selected list item, the totalizers can be reset manually to zero.The totalizer mode will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING.The setting is cold start resistant.

Select the menu item QUANT. WRAPPING.

Select ON to work with overflow.

Select OFF to work without overflow.

Note: The output of the sum of both totalizers (the throughput Q) viaan output will not be valid anymore after the first overflow

(wrapping) of one of the respective totalizers.

To signalize the overflow of a totalizer, an alarm output withthe switching condition QUANTITY and the type HOLD has to be

activated.


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9.4 Upper Limit of the Flow VelocitySingle outliers caused by heavily disturbed surroundings can appear in the measured values of theflow velocity. If outliers are not ignored, they will affect all derived physical quantities, which will thenbe unsuitable for integration (e.g. pulse outputs).

It is possible to ignore all measured flow velocities higher than a preset upper limit. These measured

values will be marked as outliers.The upper limit of the flow velocity will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \

MEASURING. The setting is cold start resistant.

Select the menu item VELOCITY LIMIT.Enter the upper limit of the flow velocity Values between0,1 und 25,5 m/s will be accepted.Enter 0 (zero) to switch off the velocity control.Press ENTER

If the control is switched on (upper limit > 0.0 m/s), every measured flow velocity willl be compared tothe entered upper limit. If the flow velocity is higher than the upper limit,

the flow velocity will be marked as invalid!. The physical quantity can not be determined.

"!" will be displayed after the unit of measurement. (In case of a normal error, "?" willbe displayed.)

Attention! If the upper limit is too low, a measurement might be impossible,

as most of the measured values will be marked "invalid".

9.5 Cut-off FlowThe cut-off flow function automatically sets all measured flow velocities to zero that are below a presetvalue. All values derived from this measured value will be also set to zero.

The cut-off flow can depend on the flow direction or not. The default is 5 cm/s. The max. value is12.7 cm/s. The cut-off value will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \

MEASURING. The setting is cold start resistant.

Select ABSOLUTE to define a cut-off flow independentof the flow direction. There is only one limit to be set.The absolute value of the measured value will becompared to the cut-off flow.

Select SIGN to define a cut-off flow dependent on theflow direction. There are two independent limits to beset for the positive and negative flow directions.

Select FACTORY to use the default value of 5 cm/s forthe cut-off flow.

Select USER to enter the cut-off flow yourself.Press ENTER.

If you selected CUT-OFF FLOW\SIGN before, two cut-off flow values have to be entered:

Enter the cut-off flow for positive measured values.

If a positive value is less than this limit, the flow velocitywill be set to zero. All derived values will be set to zero,too.

Enter the cut-off flow for negative measured values.

If a negative value is greater than this limit, the flowvelocity will be set to zero. All derived values will be setto zero, too.


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If you selected CUT-OFF FLOW \ ABSOLUTE before, only one value has to be entered.

The limit will be compared to the absolute value of the

measured flow velocity.

9.6 Uncorrected Flow VelocityFor certain applications, the knowledge of the uncorrected flow velocity might be of interest. Select theoption Quantity Storage under the branch SPECIAL FUNCTION \SYSTEM SETTINGS \

MEASURING in order to activate / deactivate the flow velocity correction. The setting is cold startresistant.

Select Normalfor corrected flow velocity and select

Uncorr.for uncorrected flow velocity.

Press ENTER.

Henceforth, the UDM 200 asks whether or not theprofile correction shall be enabled before ameasurement is started.

If you select NO, correction is completely deactivated.All measuring factors are calculated with theuncorrected flow velocity. To make this clear, thenames of the factors are shown in capital letters.

If you select YES, the UDM 200 only uses the

uncorrected flow velocity if the FLOW VELOCITYfactors

was selected in the OUTPUT OPTIONS. The UDM 200calculates all the other factors (volume flow, mass flow,etc.) using the corrected flow velocity. During themeasurement, FLOW VELOCITYis shown in capitalletters to indicate that the displayed flow velocity is notcorrected.

Press ENTERto confirm.

However, in both cases, the corrected flow velocity canbe displayed. Scroll to the second line in the display

( button) until you see the flow velocity. The

uncorrected flow velocity is marked with a U.


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9.7 Change of Limit for the Inner Pipe DiameterIt is possible to modify the lower limit of the inner pipe diameter for a certain transducer type. Thesetting is cold start resistant.

Enter HotCode 071001.Enter the lower limit of the inner pipe diameter for thedifferent transducer types. Values between 3 mm and63 mm will be accepted.

Press ENTERto confirm every single value.

9.8 Protection code for unwanted interruptionA current measurement can be protected from an inadvertent intervention by a program code.

If a program code was defined, it will be requested as soon as there is an intervention in themeasurement (a command or key BRK.)

If a program code is active, the message PROGRAM CODE ACTIVE will be displayed when a key ispressed. This advice disappears after several seconds.

To start a command, it is sufficient to enter the first three digits of the program code (= ACCESS code).

To interrupt a current measurement, the complete program code has to be entered (= BREAK code).

Attention! Do not forget the program code!

Select in the program branch SPECIAL FUNCTION

the menu item SET PROGRAM CODE.

Enter a program code with max. 6 digits.

Press ENTER.

An error message will be displayed if a reservednumber has been entered (e.g. a HotCode forlanguage selection).

A program code remains valid as long as:

no other valid program code is entered or

the program code is not deactivated.


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9.8.1 Intervention in the MeasurementIf a program code was defined, the UDM 200 asks for this code as soon as someone tries to interrupta running measurement.

Enter the program code (as necessary ACCESS- or

BREAK-Code) with the keys and .

You can break up the program code input and returnto measurement by pressing key C.

At first 000000 will be displayed. If the program code

starts with 000, ENTERcan be pressed directly.

If the entered program code is not valid, a failurenotice will be displayed for a few seconds.

If the entered program code is valid, the accordingcommand will be accomplished or the measurementwill be interrupted.

9.8.2 Deactivation of a Program CodeSelect in the program branch SPECIAL FUNCTION

the menu item PROGRAM CODE.The program code will be deleted by entering------.

Press ENTER.

Important note:If the character - is entered less than six times, thischaracter string will be used as new program code.


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9.9 Measuring the Sound Velocity of the Medium

Select OUTPUT OPTIONSin the main menu.

Select the sound velocity as the measuring factor.


This selection closes OUTPUT OPTIONS, because there can be no output of measured values duringthe sound velocity measurement.To start the sound velocity measurement, select MEASUREMENT.

Enter an estimated sound velocity for the medium.Values between 800 and 3500 m/s are accepted.


Select YESto perform a reflection measurement, or NOto perform a diagonal measurement. Generally, it iseasier to position the sensors correctly for a reflectionmeasurement than for a diagonal measurement.

Fasten the sensors to the pipe. Make sure the sensordistance is as recommended.


(The UDM 200 calculates this sensor distance from the

estimated sound velocity and the current parameters.)The signal amplitude is shown on the bar chart. Move the sensors relative to each other, until the barsstart getting smaller. Find and adjust the maximum signal amplitude at the shortest possible sensordistance.

Press ENTERto finish positioning the sensors.

Note: Do not move the sensors any more.

Measure the current (exact) sensor distance and enter it.In this example the sensor distance is 25.5 mm.



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An error message may now appear, stating that the estimated value is too high or too low. In bothcases, the estimated sound velocity you entered deviates too far from the actual sound velocity. Thesensors were positioned on an false signal or an echo.

Press ENTERto acknowledge the error message. Enter a new estimated sound velocity.

The measurement starts as soon as you have enteredan estimated value comparable to the actual soundvelocity of the medium.

9.9.1 Displayed Information

Press the and buttons to see more information in the top or bottom line of the display.

Current sensor distance (L):The distance entered for the last positioning of the sensors. This value is used forcalculating the sound velocity.

Improved distance (L*):The sensor distance calculated from the measured sound velocity.This distance enables you to identify incorrect positioning. However, do not alter the sensordistance!

Signal propagation display (t):

The signal propagation delay in the medium can bedisplayed in the top line.

Press ENTERto finish the current measurement.

You can now repeat the positioning of the sensors.

The UDM 200 asks if you want to determine the correct sensor distance again. Select NOif the sound

velocity of the medium was precisely measured (sensor positioning error |L*-L| less than 1 mm).

Select YESif the difference between the current sensor distance and the improved distance is morethan 1 mm or if the signal was not detected. A new measurement is started.

You can repeat the measurement as often as you want. In most cases, however, one or twomeasurements are enough to determine the sound velocity.

Select YESso save the measured sound velocity in thecurrent parameter record.

You can edit the measured sound velocity beforesaving it.


The name of the medium in the parameter record ischanged to OTHER MEDIUM.


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10 OutputThe UDM 200 is equipped with outputs, which have to be installed and activated before they can beused.

It takes two steps to install an output:

defining the physical quantity (source item) to be transmitted to the output by the source channeland the properties of the signal

defining the behavior of the output in case no valid measured values are available

After that the installed output has to be activated (program branch Output Options).

10.1 ActivationThe outputs will be activated in the program branch SPECIAL FUNCTION \ SYSTEM SETTINGS \

PROC. OUTPUTS.

Note: The configuration of an output will be stored at the end of thedialog.

If the dialog is left by pressing key BRK, the changes will not be

stored.

Select in SPECIAL FUNCTION \ SYSTEM SETTINGS

the list item PROC. OUTPUTS.

Press ENTER.

Select the output to be installed. The scroll list containsall actually available outputs.

A tick after a list item indicates that this output hasalready been installed.

Press ENTER.

This display is indicated if the output has not beeninstalled yet. Select YES.

Press ENTER.

If the output is already installed, select NO to

reconfigure it or YES to return to the previous menuitem to select another output.

Press ENTER.

Select the physical quantity (source item) to betransmitted from the source channel to the output.The available source items and the accordingconfiguration options are summarized in the followingtable.If a binary output is configured, only the list itemsLIMIT and IMPULS will be displayed.


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Table: Configuration options of the outputs

source item availableconfiguration options

output

Measuring value actual measur

flow

heat flow

physical quantity selected in the program

branch OUTPUT OPTIONS

Quantity Q+ totalizer for the positive flow direction

Q- totalizer for the negative flow direction

Q sum of the totalizers (positive andnegative flow direction)

Limit R1 limit message (alarm output R1)

R2 limit message (alarm output R2)

R3 limit message (alarm output R3)

Impuls from abs (x) pulse without sign consideration

from x >0 pulse for positive measured values

from x


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10.1.2 Error OutputIn the further dialog, an error value can be defined which is to be output if the source item can not bemeasured e.g. when gas bubbles are in the medium.

Table: Error Output Options

error output option result

MINIMUM output of the lower limit of the output range

LAST VALUE output of the last measured value

MAXIMUM output of the upper limit of the output range

OTHER VALUE The value has to be entered manually. It has to be within the limits of theoutput

Example:The volume flow has been selected as source item for a current output, the output range is4...20 mA, the error value delay td > 0.

The volume flow can not be measured in thetime interval t0...t1.Which signal shall be displayed during thistime?

???v [m3/h]

tt0 t1

Fig.: error output

Table: Error Output Options

selected error output option output signal

I [mA]

20

4

t

td

I [mA]

20

4

t

I [mA]

20

4

t

td


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error output = 2.00 mA

I [mA]

20

4

t

td

Select a list item for the error output. Press ENTER.

If OTHER VALUE ... is selected, enter an error value.It has to be within the limits of the output.

Press ENTER.

Note: The settings will be stored now at the end of the dialog.

The terminals to be used are now displayed (here: P1+

und P1- for the active current loop)Press ENTER.

10.1.3 Function TestThe function of the installed output can now be tested. Connect a multimeter to the installed output.

Test of the Analog OutputsThe current output is tested in the example.Enter a test value. It has to be within the output range.

Press ENTER.

If the multimeter displays the entered value, the inputworks.Select YES to repeat the test, NO to return to SYSTEM

SETTINGS.

Press ENTER.


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Test of the Binary Outputs

Select REED-RELAIS OFF in the scroll list OUTPUT

TEST to test the de-energized state of the output.Press ENTER.

The output should now be de-energised.

(Measure the resistance at the output. The value has tobe high ohmic.)

Select YES.

Press ENTER.

Select REED-RELAIS ON in the scroll list OUTPUT

TEST to test the energized state of the output.

Press ENTER.

The output should now be energised.

(Measure the resistance at the output. The value has tobe low ohmic.)

Select YES to repeat the test, NO to return to SYSTEM

SETTINGS.

Press ENTER.

10.2 Error Value Delay

The error value delay is the time interval after which the error value will be transmitted to the output incase no valid measured values are available. The error value delay can be entered in the programbranch OUTPUT OPTIONS if this menu item has been previously activated in the program branch

SPECIAL FUNCTION. If you do not enter a value for the error delay, the damping will be used.

Select inSPECIAL FUNCTION \ SYSTEM SETTINGS \

DIALOGS/MENUS the menu item

ERROR-VAL. DELAY.

Select DAMPING if the damping value is to be used aserror value delay. Select EDIT to activate the errorvalue delay request.

From now on, the error value delay can be entered inthe program branch OUTPUT OPTIONS.The setting is cold start resistant.


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10.3 Activation of an Analog Output

Note: An output can only be activated in the program branch

OUTPUT OPTIONS if it has been previously installed.

Select program branch OUTPUT OPTIONSin the mainmenu.

Select YESto activate an output.Press ENTER to confirm.

10.3.1 Measuring Range of the Analog OutputsAfter an analog output has been activated in the program branch OUTPUT OPTIONS, the measuringrange of the source item has to be entered.

Enter in Zero-Scale Val. the lowest measuredvalue expected. The unit of measurement of thesource item will be displayed.

Zero-Scale Val.is the measured valuecorresponding to the lower limit of the output range asdefined in section 10.1.1.

Enter in Full-Scale Val.the highest measuredvalue expected.

Full-Scale Valis the measured valuecorresponding to the upper limit of the output range asdefined in section 10.1.1.

Example: The output range 420 mA was selected for a current loop, theZero-Scale Valvalue

was set to 0 m3/h and the Full-Scale Valvalue to 300 m

3/h. If the volume flow is 300 m

3/h, a

20 mA signal is transmitted to the output. If the volume flow is 0 m3/h, a 4 mA signal is transmitted to

the output.


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10.4 Activation of a Pulse OutputA pulse output is an integrating output which emits a pulse when volume or mass of the medium whichhas passed the measuring point reaches a given value (PULSE VALUE). The integrated quantity is theselected physical quantity. Integration is restarted when a pulse is emitted.

Note: The menu item PULSE OUTPUT will be displayed in the program branch

OUTPUT OPTIONS only if a pulse output has been installed.

Select the program branch OUTPUT OPTIONS in themain menu.

Select YES to activate the output.

Press ENTER.

This error message will be displayed if the flow velocityis selected as physical quantity.

The use of the pulse output is not possible in this caseas integration of the flow velocity does not result in areasonable value.

Enter the PULSE VALUE. The unit of measurement ofthe current physical quantity will be displayedautomatically.

When the totalized physical quantity reaches the pulsevalue, a pulse will be emitted.

Enter the PULSE WIDTH. Values between 80 ms and1000 ms will be accepted.The range of possible pulse widths depends on thespecifications of the instrument (e.g. counter, PLC)which will be connected with the pulse output.

The max. flow that the pulse output can work with will be displayed now. This value is calculated fromthe data given for pulse value and pulse width. If the flow exceeds this value, the pulse output will notfunction properly. In such a case, the pulse value and pulse width should be adapted to the flow

conditions. Press ENTER.

Attention! If the flow exceeds this max. value, the pulse output will not

function properly.

10.5 Activation of an Alarm Output

Note: The menu item ALARM OUTPUT will be displayed in the program branch

OUTPUT OPTIONS only if an alarm output is installed.

Max. 3 alarm outputs R1, R2, R3 per channel operating independently of each other can beconfigured. The alarm outputs can be used to output information on the current measurement or tostart and stop pumps, motors, etc.


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10.5.1 Alarm PropertiesThe switching condition, the holding behaviour and the switching function can be defined for an alarmoutput:

Table: Alarm Properties

alarm property setting description

FUNC (switchingcondition)

MAX The alarm will switch when the measured value exceeds the upper limit.

MIN The alarm will switch when the measured value falls below the lower limit.

+- -+ The alarm will switch when the flow direction changes (sign change ofmeasured value).

QUANTITY The alarm will switch when totalizing is activated and the totalizer reachesthe limit.

ERROR The alarm will switch when no measurement is possible.

OFF The alarm is switched off.

TYP(holding

behavior)

NON-HOLD If the switching condition is not true any more, the alarm returns to idle state

after approx. 1 second.

HOLD The alarm is energized when the switching condition is true and de-energized when idle.

MODE (de-energized stateof the alarm)

NO CONT. The alarm is energized when the switching condition is true andde-energized when idle.

NC CONT The alarm is de-energized when the switching condition is true and.energized when idle.

Attention! If no measurement takes place, all alarms will be de-energized,

independently of the programmed switching function.

Select the program branch Output Optionsin themain menu.

Select YES to activate the alarm output.

Press ENTER.

The following list items are available:

FUNCfor selecting the switching condition,

TYPfor selecting the holding behavior ,

MODE for selecting the de-energized state of thealarm.

Select a scroll list in the upper line with keys and .

Use keys and to select the according settings in the second line.

Press ENTERto store all changings.


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10.5.2 Setting the LimitsIf MAXor MINhas been selected in the scroll list FUNC, the limit of the output has to be defined:

Select in the scroll list INPUT the physical quantity tobe used for comparison. The following list items areavailable:

volume flow signal amplitude sound velocity of the medium

Press ENTER.

Enter the limit:

Table: limits

function display and comparison note

MAX

measured value > limitThe alarm will switch when themeasured value exceeds the upperlimit.

Example 1:

upper limit = -10.0 m3/h

A measured value of e.g. -9.9 m3/h exceeds

the limit. The alarm switches.A measured value of e.g. -11.0 m

3/h does not

exceed the limit. The alarm does not switch.

MIN

measured value < limit

The alarm will switch when themeasured value falls below the lowerlimit.

Example 2:

lower limit = -10.0 m3/h

A measured value of e.g. -11.0 m3/h is below

the limit. The alarm switches.

A measured value of e.g. -9.9 m3

/h is notbelow the limit. The alarm does not switch.

QUANTITY

totalizer limitThe alarm will switch when the totalizerreaches the limit.

A positive limit will be compared to value ofthe totalizer for the positive flow direction.A negative limit will be compared to value ofthe totalizer for the negative flow direction.The comparison will also be made if thetotalizer of the other flow direction isdisplayed.

Note: The limit values are interpreted in the respective active unit.

If the global unit setting is changed, the limits are not

automatically adapted and have to be changed manually.

Example: If a limit of 60.0 m3/h is defined and if the unit is

changed to m3/min, the limit has to be changed to 1,0 m

3/min


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10.5.3 Defining the HysteresisA hysteresis can be defined for alarm output R1 preventing a constant triggering of the alarm bymeasuring values fluctuating marginally around the limit. The hysteresis is a symmetrical rangearound the limit. The alarm will be activated if the measured values exceed the upper limit anddeactivated if the measured values fall below the lower limit.

Example: The limit is 30 m3/h and the hysteresis 1m

3/h. The alarm will be triggered at values

> 30.5 m3/h deactivated at values < 29.5 m

3/h.

Enter the preferred range of the hysteresis or 0 (zero) towork without it.

Press ENTER.

10.6 Behaviour of the Alarm Outputs

10.6.1 Apparent Switching DelayMeasured values and totalizer values will be displayed rounded to two decimal places. The limits,however, will be compared to the non-rounded measured values. This might cause an apparentswitching delay when the measured value ch

Documents

Manual debitmetru UDM200.pdf