Dph 507 Manual (3pt Cal)

8/18/2019 Dph 507 Manual (3pt Cal)

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Global Electronics, Hyderabad 500029 India. Project: DPH 507 Date: 23-08-14

Prepared by: SS/TS Reviewed by: MP File: DPH507V12X OPMANUAL REVA Page: 1 of 30

DIGITAL pH METER

DPH-507

Version: 1.2X

OPERATION MANUAL

GLOBAL ELECTRONICS,3-5-331, Narayanguda,Hyderabad 500029, India

Ph: +91 40 2322 1391, 2322 6687, FAX: 23222484E-mail [email protected]

URL: www.ge-india.com


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GENERAL SAFETY

Review the following safety precautions to avoid injury and prevent damage to thisproduct or any products connected to it. To avoid potential hazards, use this product

only as specified. Only qualified personnel should perform service procedures. To AvoidFire or personal Injury

Use Proper Power Cord: Use only the power cord specified for this product and certifiedfor the country of use.

Connect & Disconnect Properly: Do not connect or disconnect probes or test leadswhile they are connected to a voltage source.

Ground the Product: This product is grounded through the grounding conductor of thepower cord. To avoid electric shock, the grounding conductor must be connected to earthground. Before making connections to the input or output terminals of the product, ensure

that the product is properly grounded.

Connect the Probe Properly: The probe ground lead is at ground potential. Do notconnect the ground lead to an elevated voltage.

Observe all Terminal Ratings: To avoid fire or shock hazard, observe all ratings andmarking on the product. Consult the product manual for further ratings information beforemaking connections to the product.

Do not operate without Covers: Do not operate this product with covers or panelsremoved.

Use Proper Fuse: Use only the fuse type and rating specified for this product.

Avoid Exposed Circuitry: Do not touch exposed connections and components whenpower is present.

Do not Operate with Suspected Failures: If you suspect there is damage to thisproduct, have it inspected by qualified service personnel.

Provide Proper Ventilation: Refer to the manual’s installation instructions for details oninstalling the product so it has proper ventilation.

Do not operate in Wet/Damp Conductions.


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MANUAL HISTORY:

Status: Public CirculationDate Last Modified: 23-08-2014Document Owner: MPDistribution List: Client: DPH-507 Users

Global: Marketing, Service

Date Description Person Version14-09-2009 Basic Version GS/MP 1.2030-04-2012 Change calibration GS/MP 1.2110-05-2012 Change calibration display GS/MP 1.22


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INDEXPage no

1. Introduction……………………………………………………………………5

2. Salient features……………………………………………………………….5

3. Theory of operation………………………………………………………….6

4. Specifications…………………………………………………………………7

5. Front panel keys operation…………………………………………………8

6. Functional flow diagram…………………………………………………….9

7. Program mode flow diagram………………………….…………………..10

8. Configuration mode flow diagram……………………………………….10

9. Display………………………………………………………………………...11

10. Front panel LED indications……………………………………………..11

11. Modes of operation…………………………………………………..……12

12. Run mode…………………………………………………………………...12

13. Configuration mode………………………………………….……………13

13.1Password change………………………….…………….……….14

13.2Baud rate setting………………………………………………….15

13.3calibration standard……………………………………………...16

14. Program mode…………………………….………………………………..17

14.1Calibration mode………………………………………………….17

14.2Service mode……………………………………………………....25

15. Load default mode……………………………….………………………...29

16. Error description……………………………………………………….…..29

Warranty certificate………………………………………………….………...30


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1. Introduction:

GLOBAL Microprocessor basedDigital pH, Model DPH 507 is aprecise and rugged instrumentdesigned to meet the needs of serious

pH and temperature measurement inLaboratories & Industries. Thisinstrument features Automatictemperature compensation & Manualtemperature compensation for pH, inaddition to measuring Temperature ofthe solution.

This instrument incorporates the lateststate of Art Technology and is housed in a specially treated stress relieved metal cabinet. All the controls in regular use are provided on the front panel for operational ease. It hasnon-blinking bright 7-segment LED’s display of 4 digits for pH/mV and 3 digits for temp.

This instrument has a built-in voltage stabilizer and is capable of operating at 230V-50Hz.

2. Salient feature:

Microprocessor based design with `Self Diagnostics Program’ the systemChecking itself, the electrode and temperature sensor for faults.

Truly versatile stand along instrument.

Extremely user-friendly keyboard and prompting display for easy operation.

Easy calibration from keyboard

Display of pH and Temperature with selectable mV display for ORP measurement.

Auto / Manual Temperature Compensation with digitally selected temperature.

Poor Electrode condition warning.

Totally environment proof keyboard.

Data stored in NON VOLATILE memory. Totally unaffected by powerInterruptions.

Automatic Display/decimal adjustment depending upon the range.


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3. Theory of operation

When a pair of electrodes, namely pH sensitive glass and reference electrodes is dippedin an aqueous solution, they generate an EMF, which is proportional to the pH of thesolution. The magnitude of EMF is also dependent on the temperature of the solution.Beside this temperature dependent EMF, a certain potential is generated by the

electrode pair and this remains fairly constant for a given pair of electrodes. Since the pHsensitive surface is glass, the internal resistance between the EMF from such a highresistance source, an ordinary VTVM cannot be used.

Therefore an electrometer amplifier with high input impedance is used to ensurehigh accuracy and a very good performance.

Display: 7 Digit, High brightness 7 -Segment LED &8 Ann LEDs4 Digits for pH/mV,3 Digits for Temp, All 7 for Messages

Annunciation LED’s: ATC, MTC, °C, RD, pH, mV, PGM, COM.

S.No Unit Range

1 pH -2.00 to 16.00

2 mV ±1999

3 Temp -50 ° C to + 200 °C


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4. Specifications

pH mV Temp

Range : -2.00 to16.00 pH +/- 1999mV -50 to +200ºC

Resolution : 0.01 pH 0.1 (-199.9 to +999.9) 0.1(-19.9 to 99.9) 1 < -199.9 & > 999.9 1 ºC 99.9

Accuracy : 0.1% ±1 digit 0.1% ±1 digit 0.1% ±1 digit

Reproducibility : 0.01 0.1/1 0.1/1

Temperature Manual

Compensation : MANUAL /ATC -50ºC to +200ºC

Input impedance : Greater than 1013 Ohms

Input bias current : Less than 1 pA @ 25°C

AP Range : ±75mV

Slope adjustment : 75% to 125%

Calibration : pH: Single, Two- point & Three - pointUsing any standard of USA: 4.01, 7.00 & 10.00 orNIST: 4.01, 6.86 & 9.18Temperature Single & Two point at any temperature

Programming : Direct Keyboard Entry: 5 Keys

Data entry : Through user-friendly keyboard and Prompting display.

Options : RS232C

Dimensions : 190 x 130 x 60 (w x d x h)

Power : 230V AC, 50 Hz

*Specifications and Data subject to change without prior notice.

*Please contact factory for details of the Display range, Accuracy & Sensor Scaling.


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5. Front Panel Keys operation:

Program/Calibration/Escape keyModes: RUN, Configuration, Load default, Program.

• If this key is pressed and the instrument powered up while stillpressed, the instrument Configuration mode is initiated.

• During normal operation “Run mode”, if this key is pressed, “Program

mode” is initiated.

• Return from any mode without saving changes (Escape)

• Return back to previous screen (Back).

Scroll keyModes: RUN, Configuration, Load default, Program.

• Selects next digit, Load Default Mode (Power ON).• Select ATC or MTC

• Select next function in Configuration, Service or calibration mode.

• Select next digit when user is entering any numerical data (e.g.Password entry, Calibration values, etc.)

Increment key Modes: RUN, Configuration, Load default, Program.

• Increments selected digit during data entry.

•

For each keystroke increments one-value up to 9 and for the next• keystroke roll back to 0 and again starts incrementing.

Decrement keyModes: RUN, Configuration, Load default, Program.

• Decrements selected digit during the data entry.

• For each keystroke decrements one value up to 0 and fornext keystroke again starts decrementing from 9.

(PH/mV)/ENT key Modes: RUN, Configuration, Load default, Program.

• This key is used to enter into any of the modes and check pH value inmV (displayed value equals to the value set in the mV calibrator).

• Accepts and stores displayed value.

• Accept and store program value changes.


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6. Functional Flow Diagram:

DPH-507

Power ON starts

PGM

key

pressed ?

ALL Leds are ON

Enter Run Mode

SCRL

key

pressed ?

Service,Calibration Modes

Yes

No

Yes

Yes

No

PGM

key

pressed ?

Configuration Mode

Default load Mode


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7. Program Mode Flow Diagram:

8. Configuration Mode Flow Diagram:

PROGRAM MODE

Calibration

pH Temp

1pt 2pt 3pt 2pt1pt

Service

EEPROMKeyAdcDisp


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9. Display:

Two digit “power ON” display.

This will be displayed during the Initial powerup for the device.

The upper row value 7.00 indicates pH and 25.0 inthe lower row indicates temperature in degreecentigrade (ºC). ATC, MTC can select using scrollkey.

10. Front Panel LED indications:

The Front Panel is having 2 rows of 4 digits LED’s display for pH/mV and 3 digits LED’sfor temperature, including 8 -Annunciation LED’s for ATC, MTC, °C, RD, pH, mV, PGM,COM.

• An ATC LED glows when Temperature is set in ATC mode. It is selected using scrollkey with Sensor connected (Automatic Temperature compensation).

• MTC LED glows when the temperature is set in MTC (Manual TemperatureCompensation) mode.

pH LED

mV LED

READ LED

°C LED

ATC LED

MTC LEDPGM LED


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• °Celsius LED indicates temperature is in °C (ATC / MTC mode).

• Read LED glows when pH is stable while calibration.

• pH LED glows when the pH value is displayed.

•

mV LED glows when a pH value is indicated in mV.

• PGM LED glows in other than RUN mode.

11. Modes of Operation:

1. RUN Mode2. Program mode

• CALIBRATION Mode.

• SERVICE Mode

3. CONFIGURATION Mode.4. Load Default Mode

12. Run Mode:

Whenever the device is switched “ON” and if no key pressed during Power ON, itgoes into RUN mode, it remains in RUN mode until any key press.

The upper row displays the pH value.

The lower row displays temperature value. User canchange MTC temperature in run Mode,only by usingINCR or DECR key if it is in MTC mode


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13. Configuration Mode: (Can be activated only while switching ‘ON’ device)

To enter into CONFIG mode, first press PGM key & then switch ON the device donot leave PGM key till all LEDs are switched OFF except PGM LED. It displaysConf iguration.

Enter correct password (three digits numeric 000 to 999) the device will enterConfiguration mode. In case if you forget the password, all settings including thepassword can be set to default setting by loading default during power on set-up. (Referto Default Load section).

In Configuration mode, following functions can be set:

1. Configuration & Calibration modes Password can be changed.

2. BAUDRATE can be set for communication.

3. Calibration Stranded selection

Note: Any change in data is saved ONLY after pressing ENT key.

Enter correct password. (In this screen first digit blinks)

▲ /▼: Increment/decrement selected digit by 1 foreach keystroke, 1st digit.

►: Select next digit of password, selected digitblinks.

ENT: If the entered password is correct then afterpressing the ENT key enters into the ConfigurationMode.

PGM: Abort CONFIG mode & go to RUN mode.

(Note: Default configuration password is 900)

If the entered password is wrong, it will show the

error (ConF Err ) screen for 3 sec and return back

to configuration screen. This will repeat until the

correct password is entered.


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Note: In case if you forget the password, all settings including the password can be set todefault setting by loading default during power on. (Refer to Default Load section).

13.1. Password change

The starting function of configuration mode is Password CHange. Password can bechanged in between the range 000 to 999.

►: Goes into baud rate setting screen.

ENT: Enters into Passwor d CHange for

Configuration mode.

PGM: Abort Configuration mode.

13.1.1 Password change for Configuration:

►: Goes into password change for Calibrationmode.

ENT: Enters into password CHange forConFiguration mode.

PGM: Goes to Password Change screen.

Always 000 will display in Password screen (default).

▲ /▼: Increment / decrement selected digit by 1 foreach keystroke, 1st digit.

►: Select next digit of password, selected digit blinks.

ENT: New password will be saved & theConfiguration Screen automatically will appear.

PGM: Previous password remains same & newpassword will not save.


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13.1.2. Password change for Calibration mode:

Passwor d change for Calibration mode:

►: Goes password change for Configuration mode.

ENT: Enters into password change forCALibration mode.

PGM: Return to the Password change Screen.

▲ /▼: Increment/decrement selected digit by 1 foreach keystroke 1st digit.

►: Select next digit of password, selected digit

blinks.

ENT: New password will be saved & the PreviousScreen will appear.

PGM: Previous password remain same & newpassword will not save and password changescreen will appear.

13.2. Baud rate Setting:

►: Goes to the Calibration Standard Settingscreen

ENT: Enter into baud r ate Setting.


▲: baud rate is changed to 19.2

▼: baud rate is changed to 4.8

ENT: New baud rate (9.6) is saved then baud rate screen automatically will appear.

PGM: Old baud rate remains same and new baudrate is not saved then again baud rate settingscreen will appear.

Note: Default baud rate setting is 9.6


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13.3. Calibration standard:

There are two kinds of standards:

USA standard NIST standard

13.3.1. USA Standard:

►: Goes password change Screen.

ENT: Enter into CALibration Standard mode.


►: Select Nist standard using the scroll key.

ENT: Accepts the Calibration in USA Standardand previous Calibration standard screen willappear .

PGM: Previous Calibration standard remain same,new Calibration standard will not save and it willcome back to the previous screen.

Note: If USA standard mode is selected calibration will be done for buffers 4.01, 7.00 and10.01 pH.

13.3.2. NIST Standard:

►: Select USA standard using the scroll key.

ENT: Accepts the Calibration in nist Standardand previous Calibration standard screen willappear.

PGM: Previous Calibration standard remain same,new Calibration standard will not save and it willcome back to the previous screen.

Note: If niSt standard mode is selected calibration will be done for buffers 4.01, 6.86 and9.18 pH.


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14. Program mode:

When PGM key is pressed in RUN mode following modes can be accessible.

• Calibration mode

• Service mode

Enter correct password for Programming mode i.e Calibration mode (Password canbe changed in Configuration mode).

In RUN mode(After switch ON the instrument) press PGM key then enters in to theCalibration mode. It will ask password for Calibration mode as shown in the belowscreen.

14.1. Calibration Mode:

►: Goes for service mode.

ENT: Displays CAL screen with password blinking.

PGM: Abort the calibration mode & go to RUNmode.

Enter correct password. (In this screen first digit blinks.)

▲ /▼: Increment / decrement selected digit by 1for each Keystroke, 1st digit.

►: Select next digit of password, selected digit blinks.

ENT: Goes into pH calibration mode.

PGM: Abort Program Function & go to RUN mode.

If the entered password is wrong, it will show the

error (CAL Err ) screen for 3 sec and return back to

previous screen. This will repeat until the

correct password is entered.


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Note: In case if you forget the password, all settings including the password can be set todefault setting by loading default during power on. (Refer to Default Load section).

In CALibration mode, two parameters should be calibrated.They are:

1. pH calibration.2. Temperature calibration.

Both pH and temperature calibration can be classified further based on number ofpoints.

• Single point• Two point• Three point (pH only)

14.1.1PH calibration:

►: It goes for temperature Calibration Screen.

ENT: Enter into pH Single point calibration mode.

PGM: Goes back to calibration mode screen.

14.1.1.1 Single point calibration:

►: Goes to 2pt/3pt point calibration.

ENT: Enters into single (1) Point PH calibration.

PGM: Abort the single point calibration.

►: Selects next buffer value 4.01/ 9.18pH.

PGM: Abort the single point calibration mode & goto the pH calibration screen

pH

mV

Read

ºC

ATC

MTC


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ENT: The display alternates between current pH and required pH value.

ENT: Accept the Current pH value to required pH value & displays the screen of 2P2(Second point).

►: Selects other buffer values 9.18(nist) to be

calibrated.

PGM: Aborts and goes back to pH Calibrationdisplay.


ENT: Calibrate for selected pH & busy screen indicates device is validating calibration.Calibration is valid then device will display Previous screen i.e busy 2p1 otherwise it willdisplay busy error.


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14.1.1.3 Three point calibration:

To enter into Three (3) Point CALibration mode, user has to press ► key after display oftwo point calibration on screen.

►: Goes for single point /two point calibration.

ENT: Enter into three (3) Point CALibration modeand go to first point entry i.e. 6.86

PGM: Aborts 3-point calibration and goes back topH calibration screen.

►: Selects next buffer values 4.01 /9.18(nist) to be

calibrated.

PGM: Abort calibration and goes back to pHcalibration screen.


ENT: Accept the Current pH value to required pH value & displays the screen of 3P2(Second point).

►: Selects other buffer values 9.18/6.86 (nist) to becalibrated.

PGM: Abort calibration and goes to pH calibrationscreen.


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ENT: Accept the Current pH value to required pH value & displays the screen of 3P3(Third point).

►: Selects other buffer values 6.86/4.01 (nist)to be calibrated

PGM: Aborts and goes back to pH calibrationScreen.


ENT: Calibrate for selected pH & busy screen indicates device is validating calibration.Calibration is valid then device will display Previous screen i.e busy 3p1 otherwise it willdisplay busy error.


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14.1.2 Temperature calibration:

Note: For temperature calibration sensor should be connected & it should be in ATCMode only.

1. This screen appears when the user tries to

calibrate temperature in MTC mode.

2. To select ATC mode user should go to runmode & Press ► key.

►: Goes pH calibration screen

ENT: Enter into tEMP CALibration function. i.e.single point calibration

PGM: Aborts temperature calibration.

14.1.2.1 Single point calibration:

►: Goes for two point calibration.

ENT: Enter into Single (1) Point CALibrationmode.


▲ /▼: Increment /decrement selected digit by 1 foreach Keystroke selected (digit blinks).

►: Select next digit selected digit blinks.

ENT: Accept the entered value and then ok screenwill appear as shown in the below screen

PGM: Abort the Single point calibration mode.

The first point entry 0 (zero) is to be loaded followedbby enter key press which starts Calibration asshown below.


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If Calibration is done wrong, in that case the displaywill shown Err or screen.

14.1.2.2 Two point calibration:

►: Goes for single point calibration.

ENT: Enter into two (2) Point CALibrationmode.


▲ /▼: Increment /decrement selected digit by 1 foreach Keystroke selected (digit blinks).

►: Select next digit selected digit blinks.

ENT: Accept the entered value and go for firstpoint entry and then Second point entry screen willappear.

PGM: Abort the two-point calibration mode.

▲ /▼: Increment/decrement selected digit by 1 for each keystroke (last digit blinks).

►: used to select next digit, selected digit blinks.

ENT: Accept the entered value and then ok screenwill appear as shown in the below screen.

PGM: Abort the two-point calibration mode.

If Calibration done correctly The “busy 2P1”screen will appear.


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If Calibration done wrong in that case the displayWill shown Err or screen.

14.2 Service Mode:In service mode the various functions provided for the user are

• Dsp

• Adc

• Key

• EEPROM

►: Select next mode of program function calibrationmode.

ENT: Goes into service mode.

PGM: Aborts service mode.

14.2.1 Service Display:

In service mode each bit of 7-seg Led’s are tested in a particular fashion.

►: Goes for ser vice AdC mode

ENT: Check whole display (every single LED willglow one by one )

PGM: Goes for service mode screen.

After checking display, goes to service displayscreen.


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14.2.2. Service ADC:

The ADC mode displays 4 parameters in mV, which are1. pH value.2. Temperature value.3. Reference.4. Ground.

►: Selects Service Key mode.

ENT: The value of pH in milli-volts willdisplay.

PGM: Abort from Service screen.

►: The value of Temperature in milli-volts will display

PGM: Abort from Service Adc screen.Eg: pH 000.4mV

►: The value of reference in milli-volts will display

PGM: Abort from Service Adc screenEg: Temperature 250.3 mV

►: The value of Ground in milli-

volts will display

PGM: Abort from Service Adc screen.Eg: Reference Voltage 0998.8 mV


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►: The value of pH in milli- volts will display

PGM: Aborts from service Adc screen.

Eg: Ground 0000.0 mv

14.2.3 Service Key:Service mode is to check the Validity of each key.

►: If we press SCRL key then EEPROM mode willbe selected.

ENT: Goes into keypad checking.

Device will display which key is press.

ENT: Indicates that enter key is pressed.

PGM: Indicates that Program key is pressed.

SCRL: Indicates that Scr oll key is pressed.


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DECR: Indicates that decr ement key is pressed.

INCR: Indicates that incr ement key is pressed.

Note: To exit from this function do not press any key for 1min.

14.2.4. Service EEPROM:

►: Selects Service dispaly mode.

ENT: If EEPROM is working then display “ok”. If itis not working properly then screen will display err

PGM: Goes to Service screen.

This screen will display for a while and again goesto Ser vice EEPROM screen.


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15. Load Default Mode: (can be activated only during Power ON)

To enter into Load default mode, first press SCROLL key & then switch ON the

device, keep ► key pressed until all LEDs are switched OFF except PGM LED & it

displays load default.

If the user wants to load default values press enter key. Here if ATC mode is alreadySelected ATC LED glows while MTC LED is off.

PGM: When PGM key is pressed it abortsfrom load default function.

ENT: When enter key is pressed defaultvalues are loaded.

Parameter Default Value Table:

16. Error Description:

S.No Parameter Default Value

1 Configuration Password 900

2 Calibration Password 900

3 CAL Standard USA

4 Baud rate 9.6

Error CORRECTION

ADC Error Bring instrument to factory

EEPROM Error Change memory chip

Calibration Error Again calibrate with proper calibrationprocedure

PASSWORD Error Enter correct password

Temp < 0ºC or > 61ºCwhile calibration

while calibration of pH keep temperaturebetween 0 to 61ºC

Entered number is notwithin limit

Please check limit of enter digit


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Warranty certificate Product: : Digital pH Meter

Model : DPH 507

Serial No. :

GLOBAL ELECTRONICS warrants its products, when properly applied and operated

under normal conditions, to be free from faulty workmanship or defective materials for a

period of ONE YEAR from the date of original shipment. Global products repaired or

replaced pursuant to this warranty shall be warranted for the un expired portion of the

warranty applying to the original products. The liability of Global under this warranty shall

exist provided that

a) Global is promptly notified upon discovery of such defects by Buyer; and

b) The defective product is returned to Global, transportation paid by Buyer or at

Global’s discretion the said product is inspected and repaired at Buyer’s site; and

c) Global’s examination of such product disclose that there was defect in Global material

or workmanship; and

d) Global nameplates and markings have not been altered or removed.

e) The safety procedures mentioned in this manual are strictly adhered to.

f) The unit is always used within the specifications and environment mentioned in this

manual and never misused.

In the event the defect is determined to be within the terms of this warranty, Global

agrees to repair the product or the defective portion at no charge to Buyer and to pay for

transportation back to Buyer. This warranty does not apply to consumable items like

electrodes, conductivity cells, temperature sensors, fuses etc. or parts which in Global’s

opinion have been subject to misuse, neglect, altered or damaged by accident or

abnormal conditions of operation or handling.

Global reserves the right to make changes in design and specifications without

notice and without any obligation of such changes on units purchased. Until superseded

or in contractual form, this warranty is expressly in lieu of all other liabilities andobligations on the part of Global Electronics.

Place: Hyderabad for GLOBAL ELECTRONICS

Date:

Documents

Dph 507 Manual (3pt Cal)