HygroGuard MMY 2650HygroGuard MMY 2650 Section 1 — Introduction Page 3 Unpacking and Inspection Examine the shipping carton for broken or open packing, distor-tion, or any other

HygroGuard MMY 2650

Moisture Analyzer

Installation and Operation Manual

July 18, 2001Part No. 63005130/A.00 ECO No. 5437Copyright

2001 General Eastern Instruments

General Eastern Instruments

20 Commerce Way, Woburn, MA 01801-1057

Tel: (781) 938-7070 Fax: (781) 938-1071

The information in this manual is believed to be reliable.However, General Eastern makes no warranty, ex-pressed or implied, as to its accuracy and assumes noliability arising out of its use by others. We reserve theright to change this manual without prior notice.

The Humidity Experts

Safety:

This manual as well as safety labels posted on the instrument use the following safety alerts to draw your attention to special safety instructions that should be followed.

Windows 95, Windows 98, and Windows NT are trademarks of Microsoft Corp.

CAUTION

CAUTION:

Hazards or unsafe practices could result in electrical shock, minor injury, or product damage.

WARNING

WARNING:

Refer to accompanying document for additional information.

ALERT

ALERT:

Earth ground connection; removal could result in electrical shock, minor injury, or product malfunction.

DECLARATION OF CONFORMITY

We, General Eastern20 Commerce WayWoburn, Massachusetts 01801

declare under sole responsibility that the

General Eastern MMY 2650

to which the declaration relates is in conformity with the relevant provisions of the following standard(s) or other normative document(s).

EC EMC Directive 89/336/EEC:

EN61326-1(1997) Standard for Equipment for Measurement control and Labo-ratory Use.

CISPR11 (1990) Class B Radiated and conducted emissions standard for industrial, scientific and medical (ISM) equip-ment.

IEC 1000-3-2 (1995) Harmonic emissions

IEC 1000-3-3 (1994) Voltage fluctuations/flicker emissions

IEC 1000-4-2 (1995) Electrostatic discharge immunity requirements

IEC 1000-4-3 (1995) Radiated electromagnetic

fi

eld immunity requirements

IEC 1000-4--4 (1995) Electrically fast transients/burst immunity requirements

IEC 1000-4-5 (1995) Surge immunity requirements

IEC 1000-4-6 (1996) Conducted RF immunity requirements

IEC 1000-4-11 (1994) Voltage interrupts requirements

EU Low Voltage Directive 72/23/EEC:

EN 61010-1 Safety for Electrical Equipment for Measurement, Control and Laboratory use

General Eastern Instruments (GEI) reserves the right to change or modify our product appearance and specifications at any time and without notice. Therefore, the information in this document is subject to change without notice and does not represent a commit-ment on the part of GEI.

No part of this manual may be reproduced or transmitted in any form or by any means, electronics or mechanical, including photocopying and recording, for any purpose without the express written permission of GEI.

If you have questions regarding the product described in this document, or need further assistance, please contact GEI at 1-800-33 HUMID from North America, or at 1-781-938-7070 from outside North America, or contact your nearest sales center.

CONTENTS

SECTION 1 — INTRODUCTION

- - - - - - - - - - - - - - - - - - - - 1About General Eastern - - - - - - - - - - - - - - - - - - - - - - 1Overview of the Hygroguard MMY 2650 Analyzer - - - - - - - - 1Available versions - - - - - - - - - - - - - - - - - - - - - - - - 2Unpacking and Inspection - - - - - - - - - - - - - - - - - - - - 3Theory of Operation - - - - - - - - - - - - - - - - - - - - - - - 5Equipment drawings - - - - - - - - - - - - - - - - - - - - - - - 8

SECTION 2 — INSTALLATION

- - - - - - - - - - - - - - - - - - - - 11Probe mounting - - - - - - - - - - - - - - - - - - - - - - - - 11Opening the analyzer’s enclosure (wall-mount version) - - - - - 13Mounting the analyzer (wall-mount version) - - - - - - - - - - 14Mounting the Analyzer (panel-mount version) - - - - - - - - - 15Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 16Connecting the probe - - - - - - - - - - - - - - - - - - - - - 18Power wiring - - - - - - - - - - - - - - - - - - - - - - - - - - 19Connecting output signals - - - - - - - - - - - - - - - - - - - 20Auxiliary input signals - - - - - - - - - - - - - - - - - - - - - 21

SECTION 3 — PROGRAMMING AND OPERATION

- - - - - - - - - 23Applying power - - - - - - - - - - - - - - - - - - - - - - - - - 23Standard configuration - - - - - - - - - - - - - - - - - - - - - 23The controls - - - - - - - - - - - - - - - - - - - - - - - - - - 23The LCD display - - - - - - - - - - - - - - - - - - - - - - - - 24The programming matrix - - - - - - - - - - - - - - - - - - - - 25Analog output setup - - - - - - - - - - - - - - - - - - - - - - 36Relay setup - - - - - - - - - - - - - - - - - - - - - - - - - - - 37

SECTION 4 — CALIBRATION

- - - - - - - - - - - - - - - - - - - - 41

SECTION 5 — RS-485 CONNECTION

- - - - - - - - - - - - - - - - 45

SECTION 6 — TROUBLESHOOTING

- - - - - - - - - - - - - - - - - 47General problems - - - - - - - - - - - - - - - - - - - - - - - - 47Error codes - - - - - - - - - - - - - - - - - - - - - - - - - - - 47Signal test - - - - - - - - - - - - - - - - - - - - - - - - - - - 49

SECTION 7 — MAINTENANCE

- - - - - - - - - - - - - - - - - - - 51Probe replacement - - - - - - - - - - - - - - - - - - - - - - - 51

APPENDIX A — SPECIFICATIONS

- - - - - - - - - - - - - - - - - - 53

APPENDIX B — WARRANTY AND RETURN PROCEDURE

- - - - - 57

FIGURES

Figure 1 Unpacking the components - - - - - - - - - - - - - - 3Figure 2 Theory of operation - - - - - - - - - - - - - - - - - - 6Figure 3 Typical calibration curve of capacitive sensor - - - - - 7Figure 4 The MMY 2650 analyzer - - - - - - - - - - - - - - - 8Figure 5 DY55 probe (without protective cover) - - - - - - - - 8Figure 6 MMY 2650 Panel Mount version - - - - - - - - - - - 9Figure 7 MMY 2650 Panel Mount version (rear view) - - - - - - 9Figure 8 Probe mounting - - - - - - - - - - - - - - - - - - - 11Figure 9 Bypass mounting - - - - - - - - - - - - - - - - - - 12Figure 10 Basic sample system - - - - - - - - - - - - - - - - - 13Figure 11 Opening the case - - - - - - - - - - - - - - - - - - 14Figure 12 Analyzer mounting - - - - - - - - - - - - - - - - - 15Figure 13 Wiring compartment - - - - - - - - - - - - - - - - 16Figure 14 Wiring connections - - - - - - - - - - - - - - - - - 17Figure 15 Wiring the probe - - - - - - - - - - - - - - - - - - 18Figure 16 AC power wiring - - - - - - - - - - - - - - - - - - 19Figure 17 DC power wiring - - - - - - - - - - - - - - - - - - 19Figure 18 Relay output wiring - - - - - - - - - - - - - - - - - 20Figure 19 Voltage output wiring - - - - - - - - - - - - - - - - 21Figure 20 Loop-Powered input - - - - - - - - - - - - - - - - - 21Figure 21 Active Input - - - - - - - - - - - - - - - - - - - - - 22Figure 22 Channel 2 connections - - - - - - - - - - - - - - - 22Figure 23 2650 controls - - - - - - - - - - - - - - - - - - - - 24Figure 24 LCD elements - - - - - - - - - - - - - - - - - - - - 25Figure 25 Sample calibration sheet - - - - - - - - - - - - - - - 41Figure 26 Error code - - - - - - - - - - - - - - - - - - - - - - 48

HygroGuard MMY 2650

Section 1 — Introduction Page

1

Section 1 — Introduction

About General Eastern

General Eastern is devoted solely to the design and manufacturing of accurate, reliable and rugged humidity measuring equipment. We specialize in providing solutions for applications where humidity measurements are critical.

There are many ways to make humidity measurements, and no one humidity sensor meets all requirements for all applications. Our variety of sensor types — including chilled mirror, lithium chloride, resistance polymer, and wet bulb — can precisely determine dew point, parts per million by volume, percent relative humidity, and other parameters.

In keeping with General Eastern’s philosophy of providing the best solutions to humidity measurement problems, we offer the following products and services:

•

High quality state-of-the-art instrumentation to assure excel-lent performance

•

A broad range of humidity instruments capable of covering virtually any humidity measurement application

•

Full applications assistance to help you choose the sensor that is best for your needs

•

Full and superior service, should it ever be needed

If you have questions about a particular measurement problem, we invite you to call and discuss your application with one of our engi-neers. Call 800-33 HUMID (if you’re calling from Massachusetts or outside the United States, call 781-938-7070). Our fax number is 781-938-1071.

Overview of the Hygroguard MMY 2650 Analyzer

The MMY 2650 is a moisture analyzer designed to operate with the DY55 trace moisture probe. The unit offers an optional input that can be used for pressure compensation or any other sensor. The

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2

HygroGuard MMY 2650


standard product comes with one current output (0–20 mA or 4–20 mA), a system alarm relay, and 3 adjustable relays all with single-pole double-throw 2.5A contacts, selectable failsafe mode, and adjustable hysteresis. One or two additional current outputs are available as options. A display and five push buttons form the user interface for data display, selection of units, ranges, setpoints, and special functions.

The MMY 2650 is only to be used as specified by General Eastern. Use other than as specified may impair the safety precautions of the system.

Available versions

The MMY 2650 is available in two mounting versions: wall mount and panel mount.

This manual generally describes the installation and wiring of the wall-mount version. Specific instructions for the panel-mount version are given where necessary.

The panel-mount version is available either with or without a protective and lockable door covering the unit’s controls.

HygroGuard MMY 2650


3

Unpacking and Inspection

Examine the shipping carton for broken or open packing, distor-tion, or any other evidence of mishandling. If inspection indicates damage to the unit or any of its components, notify the carrier promptly and request an inspection.

Move the carton to a clean work area and unpack the unit. The carton should contain:

•

MMY 2650 analyzer

•

DY55 probe

•

Probe cable

•

Installation and Operation Manual

•

Calibration certificate

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Trace Moisture AnalyzerMMR 2650Installation and Operation manual

GENERAL EASTERN

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Figure 1 — Unpacking the components

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4

HygroGuard MMY 2650


Checking theanalyzer model

number

Compare the model number on the product label with the table below to ensure you have received the correct configuration.

MMY2650-

18-36 VDC, 0.2A

85-265 VAC, 47-63 Hz,0.2A

3 OUTPUTS, 0/4 TO 20 mA

2 OUTPUTS, 0/4 TO 20 mA

1 OUTPUT, 0/4 TO 20 mA

1 OPTIONAL INPUT

_______________________

DY5x7,DY5x2 TRACE PROBE

DY55 TRACE PROBE

The Humidity Experts

GENERAL EASTERNSERIAL NO._______________________

MODEL NO. MMY2650-_____________

APPROVAL:________________________

NO OPTIONAL INPUT

Certification/ApprovalsR For safe areaY Other

Enclosure4 Panel mount enclosure, 5.67" x 5.67" (144 x 144 mm), 8.23" (209mm) depth5 Field enclosure (wall mount), NEMA 12, IP 547 NEMA 7 enclosure Class 1, Div. 1, Groups B, C, and D8 Panel mount (see option 4) but with lockable door9 Other

Operation withA DY55 trace moisture probeY Other

Optional Input1 none2 One optional input for pressure or other sensor (voltage or current) 9 Other

OutputsA One current output 0/4 to 20mAB Two current outputs 0/4 to 20mAC Three current outputs 0/4 to 20mAY Other

Power SupplyA Line power 85 to 265 VAC, 47–63Hz, 0.2AB 18 to 36 VDC, 0.2AY Other

R 5 A 1 A A

HygroGuard MMY 2650


5

Checking theprobe model

number

Configuration information for the DY55 probe is shown below:

The connectioncable

Configuration information for the probe connection cable is shown below:

Theory of Operation

The DY55 probe’s moisture sensor changes capacitance with mois-ture changes in the process stream. The capacitance is converted into a standardized interference-free Pulse Frequency Modulated (PFM) signal by the probe’s electronics. This technology allows the use of up 1000 meters of ordinary shielded interconnecting cable

DY55 -

CertificationR Standard (not certified)

Process connectionG Thread G½ to DIN ISO 228

HousingB With Bendix plug-in connection

Sensor Protection2 Protection tube with 10-micron filter

R G B 2

55C150

Cable lengthR Standard cable length: 5 meters (17ft)L Variable cable length in feet (1–1000 feet)M Variable cable length in centimeters (50–30000cm)Y Special, with variable cable length (50 – 30000cm)

R

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6

HygroGuard MMY 2650


between the probe and the analyzer, since noise does not interfere with the PFM signal.

The DY55 probe is calibrated against known dew point tempera-tures referenced by a NIST-certified chilled mirror instrument. The sensor senses the water vapor pressure independent of the carrier gas. Other units such as g/m

3

and g/kg are also available.

The DY55 probe measures dew point in the range of –80°C to +20°C, with an overrange to –100°C at the low end of the range. The probe output is a linearized PFM signal with respect to dew point. The thread is G

½

, fabricated from SS 1.4571. The probe housing provides protection to IP40.

The following graph illustrates the standardized output signal of the DY55 probe. A corresponding frequency is assigned to any dew point.

Cf

+

–

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Figure 2 — Theory of operation

HygroGuard MMY 2650


7

360 Hz

40 HzDew Point-100°C 20°C

Freq

uenc

y Hz

Figure 3 — Typical calibration curve of capacitive sensor

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8

HygroGuard MMY 2650


Equipment drawings

HygroGuardMMY 2650

analyzer

DY55 probe

ON1

2

3

HOME V H

+

–

ALARM

5.25"(133 mm)

9.65"(245 mm)

2.50"(63 mm)

2.765"(70 mm)

Figure 4 — The MMY 2650 analyzer

G 1/2 DINISO 228

1.18"(30mm)

1.67"(144mm)

.71"(18mm)

2.48"(63mm)

1.14"(29mm)

.72"(18.2mm)

Figure 5 — DY55 probe (without protective cover)

HygroGuard MMY 2650


9

Panel-mountversion of

analyzer

Rear view ofpanel-mount

version

5.67"144 mm

8.23"

209 mm

Figure 6 — MMY 2650 Panel Mount version

Figure 7 — MMY 2650 Panel Mount version (rear view)

Wiringconnectors

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10

HygroGuard MMY 2650


HygroGuard MMY 2650

Section 2 — Installation Page

11

Section 2 — Installation

Probe mounting

In-linemounting

Prior to installing the probe, insure that no contaminants are present in the pipeline (e.g., oil or soot in existing pipelines or oil residue in new pipelines). The presence of contaminants results in an increase in the response time of sensors as well as inaccurate measurements. Therefore, the pipelines should be thoroughly and routinely cleaned with a suitable solvent and dried with a dry gas prior to installing the probe. For further details, refer to the

General Hints for Trace Moisture Measurement

manual.

Remove the probe’s protective cover. The cover’s dimensions are 1.18" (30mm) diameter x 3.57" (91mm) length.

Mount the probe vertically so that the sensor tip points down. The probe is typically mounted in a G½ pipe thread connection. Insure that the tip of the probe does not touch the inside wall of the pipe.

Tighten the compression fitting as follows:

1. Hand-tighten the nut.2. Using a wrench, tighten the nut one and one-half additional

turns.

With this procedure, the fitting is sealed and can withstand pres-sure to 3000 psig.

Pipe

Probe

Figure 8 — Probemounting

Page 12 HygroGuard MMY 2650 Section 2 — Installation

Bypassmounting

Utilizing a bypass line assures no interruption of the process stream during servicing of the probe. To mount the probe in a bypass, the above procedure for in-line mounting should be followed. Exercise caution when reopening the bypass after a probe has been serviced as this may contaminate the main stream.

Mounting in asample system

If the gas velocity or temperature in your application exceeds the probe specifications in Appendix A or if particulates are entrained in the stream, a sample system should be used. In a sample system with low dew points, all wetted parts should be of stainless steel. (For further detail, refer to the “General Hints for Trace Moisture Measurement” manual.)

While the probe’s measured value is not flow-sensitive, the flow rate in a sample cell influences the response time of the system. A flow rate of 30 to 150 l/h through the flow cell is ideal. In addition, the sample gas temperature in the flow cell must remain above the dew point temperature to prevent condensation. (If the dew point is greater than 0°C, maintaining a +10°C difference is recommended.)

Probe

Mainprocessstream

Shutoff valves

Caution:Before servicing the probe, close the upstream valve in the process stream to depressurize the bypass; then shut the system's downstream valve.

Figure 9 — Bypass mounting

HygroGuard MMY 2650 Section 2 — Installation Page 13

Figure 10 illustrates a basic sample system.

Opening the analyzer’s enclosure (wall-mount version)To gain access to the analyzer’s mounting points and electrical connections, open the unit’s case as described below. Refer to Figure 11.

1. Ensure that no electrical power is present at the analyzer.2. Loosen the four plastic screws securing the cover to the enclo-

sure and remove the cover.

Probe

Valve 1

Valve 2

Flow Cell

Flow

Intake towards the middle of the pipe diameter is recommended.

If measurement is desired under system pressure:

Valve 1 is fully open and the sample flow is regulated by Valve 2.

If measurement is desired under atmospheric pressure:

Valve 2 is fully open and the sample flow is regulated by Valve 1.

NOTE: At least five feet of 1/4" tubing, if vented to the atmosphere, will insure accuracy of sample in the flow call.

CAUTION: Before removing the probe, insure that the flow cellis not under pressure!

Removing the probe when pressure exists in the flow cell could result in an extremely dangerous situation, threatening to both life and limb!

Figure 10 — Basic sample system


Note: The cover contains electronic components and is con-nected to the body of the analyzer. Either provide support for the cover, or unplug the cable from the enclosure.

3. Remove the two plastic inserts at the bottom corners of the unit.

Either pry the inserts out with a small screwdriver, or fashion a tool by straightening a paper clip and making a right angle bend about 1/16 inch (1mm) from the end.

4. Unscrew the two Phillips head screws (about four turns is suf-ficient) and remove the wiring cover.

5. Remove the wiring cover.

Mounting the analyzer (wall-mount version)The MMY 2650 analyzer should be mounted with appropriate hardware, and all wiring should conform with local electrical codes and standards. This product is for indoor use only,

A drilling template for locating the 2650’s mounting holes is supplied with the unit. Choose mounting hardware appropriate for your application.

Locate the analyzer module so that the probe cable length will not exceed 1000 feet.

1. Remove the two covers as described in the previous section.2. Slide the upper mounting bracket out from the rear of the

case to expose the upper mounting point.

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Figure 11 — Opening the case

Cover screws (4 places)Wiring cover

Plastic inserts (2 places)


3. Mount the analyzer as shown in Figure 12.Insert the upper screw into the mounting hole and tighten it. Then push the enclosure up, so that the tab slides back to a hidden position behind the case. Finally, insert the two lower screws.

4. Replace the covers.

To demount the instrument, remove the two lower screws and pull the enclosure down to expose the top mounting tab. Remove the top screw.

Mounting the Analyzer (panel-mount version)The panel-mount version of the MMY 2650 is designed to be mounted in a square cutout in an equipment panel. The unit accommodates a wide range of panel thicknesses. This product is for indoor use only. Mount the unit as described below:

1. Make a cutout in the panel measuring 5.43” by 5.43” (138 by 138 mm).

2. Slide the unit into the cutout from the front of the panel.

Slide mounting tabout from rear of case.

Mount case withthree screws.

Figure 12 — Analyzer mounting


3. From the rear of the panel, slide the two mounting clamps into place on the side of the unit (see Figure 6).

Tighten each clamp’s screw from the rear using a long screwdriver.

WiringFigure shows the wiring compartment of the 2650 analyzer, showing typical connections for power and the DY55 probe.

Figure 14 shows the complete wiring diagram for the 2650. Wiring for the probe, power and outputs are shown in Figure 15, Figure 16, Figure 17, and Figure 18.

Wiring for the Panel Mount version is the same, except that the wiring connections are accessed from the rear of the unit.

Figure 13 — Wiring compartment


1 65432 7 12111098 151413 181716 1 32

19 2423222120 25 3029282726 333231 363534

{ {{{NC C NO NC C NO NC C NO NC C NO + – + – + –{ { {

Rela

y 1

Rela

y 2

Rela

y 3

Rela

y 4

Curr

ent o

ut 1

Curr

ent o

ut 2

Curr

ent o

ut 3

Prob

e Red

Prob

e Bla

ck

2

49 O

hms

+15

VDC

out

+ Ch

. 2 In

put

0–5V

2

49 O

hms

+15

VDC

Out

+ Ch

. 3 In

put

0–5V

2

49 O

hms

(–)

Inputs

Outputs

Power

Line o

r +Ne

utra

l or –

Eart

h Gro

und

Cabl

e Shi

eld

Gro

und

wire

Notes:1. DY 55 Probe connection: 24 = RED; 26 = BLACK2. Pins 30 and 33 are 15 VDC output power for external transmitter such as 4 to 20 mA loop power.3. Auxiliary resistors of 249 Ohms are internal and connected to (–).4. For 0/1 to 5V outputs: Route 13, 15, 17 to 29, 32, 35 [0/1 to 5V against (–)].5. To input from 4 to 20 mA loop-powered devices: Connect transmitter (+) to +15 VDC out ( 33). Connect (–) to resistor ( 35). Jumper 35 to 34.6. To input from active 4 to 20mA devices: Connect (+) to resistor (35). Connect (–) to 36. Jumper 35 to 34.

(Sys

tem

Alar

m)

Figure 14 — Wiring connections


Connecting the probeOpen the analyzer’s wiring cover as described on page 13.

Feed the cable through the left-most fitting. Maximum cable diam-eter for this fitting is 0.28 inches (7 mm). Individual wires should be fed between the levers of the first row, to ease insertion into the terminal holes.

Note: The default cable length is 17 feet (5 m). Other lengths are available on special order.

Connect the probe cable to the analyzer as shown in Figure 15. Use a pointed instrument to push back the white nylon lever above each terminal, insert the stripped wire, and release the lever.

Connect the cable shield drain wire to the internal ground wire using the wire nut supplied. This connection is required to meet EMI/RFI specifications.

Securely tighten the bushing to provide strain relief for the cable. This requires two wrenches: one to hold the fitting’s nut, and one to turn the fitting’s bushing. Two wrenches are also needed to loosen the bushing to remove the cable.

Recheck all connec-tions for security and correct place-ment of all wires. Severe damage can result from incorrect wiring.

BlackRed

DY 55 Probe wires

Cable shield drain wire

Analyzer ground wire

Cable to probe Figure 15 — Wiring the probe


Power wiring

AC supply To connect power wiring to the AC version of the analyzer (Model 2650XXXXXA), obtain an appropriate line cord (1A current capacity) meeting local codes. Feed it through the right-most fitting. Maximum cable diameter for the power fitting is 0.5” (12.5mm). Tighten the bushing using two wrenches. Connect the line input to J2 Pin 1, the neutral to J2 Pin 2, and Earth Ground to J2 Pin 3 as shown in Figure 16. Voltage ranges from 85 to 275 VAC are supported.

DC supply To connect power wiring to the DC version of the analyzer (Model 2650XXXXXB), feed the cable through the right-most fitting. Maximum cable diameter for the power fitting is 0.5” (12.5mm). Tighten the bushing using two wrenches. Connect the plus wire to J2 Pin 1, the negative to J2 Pin 2, and Earth Ground to J2 Pin 3 as shown in Figure 17. Voltage ranges from 18 to 36VDC are supported.

Line

Neutral

Earth Ground

85 to 275 VAC}

Lower right corner of analyzer Figure 16 — AC power wiring

Earth Ground

Lower right corner of analyzer

+

–18 to 36 VDC}

Figure 17 — DC power wiring


Connecting output signalsCables for the relay and analog outputs are run through the two center fittings. Maximum cable diameter for the output fittings is 0.4” (10mm).

Shielded cable is required to meet RFI/EMI specifications. Connect the shield drain wire to the same analyzer ground wire used for the probe cable shield, using the wire nut provided.

Relays Relay 1 is a system alarm that activates if an error condition occurs. Relays 2, 3 and 4 are programmable as alarms for the measured data.

Wire as shown in Figure 18.

Current outputs The 2650 comes with 1, 2 or 3 current outputs, depending on the ordering configuration. Wire as shown in Figure 14 on page 17.

The (–) outputs (terminals 14, 16, and 18) are all connected to system ground.

Voltage outputs Each current output can be configured as a voltage output by connecting the current output to an internal 249 ohm resistor.

For channel 1, connect the Channel 1 + output on terminal 13 to terminal 29.



Normally closed contacts (1, 4, 7, 10)

Normally open contacts (3, 6, 9, 12)Common (2, 5, 8, 11)Analyzer

Figure 18 — Relay output wiring


Auxiliary input signals One optional input (channel 3) can be used for pressure compensa-tion, an external temperature probe, or other sensors. This input can be configured to accept 0 to 5 VDC or 4 to 20 mA signals.

4 to 20mAloop-powered

device

To connect a 4 to 20mA loop powered device:

1. Connect terminal 33 (+15V) to the transmitter’s (+) wire.2. Connect transmitter’s (–) wire to terminal 35 (the 249 ohm

resistor). 3. Connect terminal 35 to terminal 34 (analyzer input).

Active 4 to20mA device

To connect an active 4 to 20mA device:

1. Connect input (+) wire to terminal 35 (the 249 ohm resistor).2. Connect input (–) wire to terminal 36 (ground).3. Connect terminal 35 to terminal 34 (analyzer input).

Output (13, 15, 17)

(29, 32, 35) Internal resistor Analyzer

(–)

+ Out

249 ohm

Figure 19 — Voltage output wiring

33

36

35

34Loop-powered

4–20mA device

+

–

analyzer

(–)

Figure 20 — Loop-Powered input


Using theChannel 2 input

Channel 2 is an available input when the DY55 probe is used. It can be configured to accept 0–5VDC or 4–20mA signals or another PFM signal, as shown in Figure 22.

33

36

35

34Active

4–20mA device+

–

analyzer

Figure 21 — Active Input

30

36

32

31Loop-powered

4–20mA device

+

–

analyzer

(–)

30

36

32

31Active

4–20mA device+

–

analyzer

26

25PFM deviceanalyzer

Red

Black

Figure 22 — Channel 2 connections

HygroGuard MMY 2650 Section 3 — Programming and Operation Page 23

Section 3 — Programming and Operation

The concept of programming and operating the unit is very simple: The unit’s operation is controlled by a matrix of various functions. (See page 28), Each display and setup operation is accessed by moving to the cell for that function. All operation and program-ming of the unit is controlled by moving through the matrix to the desired function.

Applying powerWhen all wiring has been secured, power may be applied to the analyzer. (No power switch is supplied on the 2650—the system turns on as soon as power is applied.) Upon power-up, the analyzer performs a software diagnostics test, and then displays the dew point value.

Standard configurationThe MMY 2650 analyzer is shipped with the following standard configuration:

Normal display: Dew point in °C

Alarm set point set to –40°C DP to allow for your own setup.

Output 1 is set to –80°C to +20°C DP (delivers 4–20mA); 110% at fault.

Matrix cell V9-H8 is set to “51” (matrix locked)

Matrix cell V9-H9 is set to “0” (matrix read-only)

The controlsOperation of the 2650 is controlled by the five pushbuttons shown below.

Page 24 HygroGuard MMY 2650 Section 3 — Programming

The LCD displayThe unit’s display contains four elements:

• Display mode (MEASure or SETUP)

• Display value (with units when appropriate)

• Matrix cell location

• Matrix location name (current function)

V–

+HHOME

Return to Home position

of matrix (V0 H0)

Increase the displayed value

Decrease thedisplayed value

Move Horizontally across the matrix

Move Vertically down the martix

MEAS

Figure 23 — 2650 controls


The programming matrix

Moving throughthe matrix

The MMY 2650’s display shows the current matrix location (the “cell”) at all times, using the vertical and horizontal coordinates. For example, the upper left cell location (0,0) is designated as VH 00 on the display, and as V0-H0 in this manual.

• Press the V button to move vertically down the matrix

• Press H to move horizontally across the matrix

• Press HOME to return to the home (upper left) cell of the matrix

For example, beginning at V0-H0 and successively pressing the V button leads the user to V1-H0, V2-H0, V3-H0, V4-H0, V5-H0, V6-H0, V7-H0, V8-H0, V9-H0 and back to V0-H0. In the same manner, pressing the H button leads to V0-H1, V0-H2, etc. Using the V and H buttons, any matrix field can quickly be addressed.

The function of each cell is detailed beginning on page 30.

Entering data Some matrix cells are used for data display, and others are for programming and setup.

Figure 24 — LCD elements


At any cell where a value can be changed by the user, the digit to be altered flashes and can be increased or decreased using the + and – buttons.

In some cases, the data to be entered comprises several digits. To move the flashing cursor to the next digit to the left, press + and – simultaneously. Always enter a multi-digit number from right to left.

“Display Only”cells

Ten matrix cells are for display only and cannot be changed by the user.

Input (or programmable) fields have a flashing digit in the display, whereas “display only” fields do not.

The “display only” fields are as follows:

“Display only” cells are shown with a white background in the matrix on page 28.

Other cells allow user input for setup and control of the 2650. These cells are shown with a light gray background in the matrix.

Cell Name of display-only function

V0-H0 Display Moisture Value

V0-H8 Display raw digital frequency reading of Channel 1

V1-H0 Display Channel 2 value, usually temperature


V2-H0 Display Channel 3 value, e.g. pressure (Ch. 3 is optional)*


V9-H0 Display Channel 1 Error Code



V9-H3 Display Software Version

* If inactive, the display shows dashes.


Function Guide The matrix is organized in functional families by rows (V0 through V9). Below is a general description of these functional families indi-cating the row in which they can be found.

Unlocking thematrix for

access

Two matrix cells control access to the unit’s programming func-tions. The matrix must be unlocked before any items can be changed.

To unlock the matrix, start at the HOME position and press V nine times and H eight times to move to cell V9-H8. Use the + and – buttons to enter the number 50.

Next, to allow access to the programming cells, press H to move to cell V9-H9. To allow access to the User Setup cells, enter 1.

Row Family of Functions

V0 Channel 1 data and selection of unit of measure

V1 Channel 2 data and selection of unit of measure

V2 Channel 3 data and selection of unit of measure (option)

V3 Constants

V4 Linearization (calibration)

V5 Channel 1 output setup

V6 Channel 2 output setup (option)

V7 Channel 3 output setup (option)

V8 Relay Setup

V9 Error indications, miscellaneous setup


The Programming Matrix

H9

A

larm

Set

up

Ser

vice

Lev

el

H8

CH

1 R

awR

ead

ing

CH

2 R

awR

ead

ing

CH

3 R

awR

ead

ing

Rel

ay 4

Hys

tere

sis

Val

ue

Lo

ck M

atri

x50

= U

nlo

ck

H7

At

Fau

lt 1

At

Fau

lt 2

At

Fau

lt 3

Rel

ay 4

Set

po

int

Cyc

le t

hro

ug

h

Act

ive

Ch

ann

els

wh

ile in

VH

000=

Dis

able

H6

Co

mm

it

Rel

ay 4

In

pu

tC

han

nel

Sel

ect

Rel

ay F

ails

afe

Mo

de

(No

n-A

larm

)

H5

Nex

tP

oin

t

Rel

ay 3

Hys

tere

sis

Val

ue

Rel

ay T

est

H4

Cal

ibra

tio

nV

alu

e

Off

set

En

able

Off

set

En

able

Off

set

En

able

Rel

ay 3

S

etp

oin

t

Ser

ial O

utp

ut

En

able

0 =

Dis

able

H3

Tem

per

atu

reC

on

stan

tU

nit

Raw

Rea

din

g

Ou

tpu

tTy

pe

Ou

tpu

tTy

pe

Ou

tpu

tTy

pe

Rel

ay 3

Inp

ut

Ch

ann

elS

elec

t

So

ftw

are

Ver

sio

n

H2

Tem

per

atu

reC

on

stan

t

No

. of

Lin

eari

zati

on

Po

ints

Max

imu

mV

alu

e

Max

imu

mV

alu

e

Max

imu

mV

alu

e

Rel

ay 2

Hys

tere

sis

Val

ue

CH

3 E

rro

r

H1

Set

CH

1U

nit

Set

CH

2U

nit

Set

CH

3U

nit

Pre

ssu

reC

on

stan

tU

nit

Co

py

Min

imu

m

Val

ue

Min

imu

m

Val

ue

Min

imu

m

Val

ue

Rel

ay 2

S

etp

oin

t

CH

2 E

rro

r

H0

Dis

pla

yC

H1

Val

ue

Dis

pla

yC

H2

valu

e

Dis

pla

yC

H3

Val

ue

Pre

ssu

reC

on

stan

t

Ch

ann

elS

elec

t

Inp

ut

Ch

ann

elS

elec

t

Inp

ut

Ch

ann

elS

elec

t

Inp

ut

Ch

ann

elS

elec

t

Rel

ay 2

Inp

ut

Ch

ann

elS

elec

t

CH

1 E

rro

r

V0

CH

1in

pu

t

V1

CH

2In

pu

t

V2

CH

3In

pu

t

V3

Co

nst

ants

V4

Use

r an

dS

ervi

ce

V5

CH

1O

utp

ut

V6

CH

1O

utp

ut

V7

CH

1O

utp

ut

V8

Rel

ayS

etu

p

V9

Mis

c.S

etu

p


Meanings of various Matrix Values:

* 0=alarm if data>setpoint 1=alarm if data<setpoint

Matrixvalue

V0-H1Moisture unit

V1-H1Temperatureunit

V2-H1Pressure unit

V8-H9Alarm Setup*

0 Td °C °C bara R4R3R2 = 000

1 Td °F °F barg R4R3R2 = 001

2 ppmv psia R4R3R2 = 010

3 lbs/MMSCF psig R4R3R2 = 011

4 g/m3 hPaa R4R3R2 = 100

5 g/kg hPag R4R3R2 = 101

6 % RH R4R3R2 = 110

7 Pressure Td °C R4R3R2 = 111

8 Pressure Td °F

9 N/A

10 N/A

11 mmHg (Vapor)

12 hPa (Vapor)

Matrixvalue

V5-H3V6-H3V7-H3Output type

V5-H4V6-H4V7-H4Offset

V5-H7V6-H7V7-H7At Fault

V9-H6

Failsafe mode

V9-H9

Service Level

0 Off 0–20 mA –10% Energized Read Only

1 0/4–20 mA 4-20 mA +110% Deenergized User Setup

2 Hold


Unlocking thematrix

All of the entries in the matrix can be locked to prevent unautho-rized or accidental changes to the unit’s operation. It is recom-mended that the matrix be kept locked except when changes are being made. The matrix is locked by entering any number other than 50 in cell V9-H8. The programming examples later in this manual refer to this section.

To unlock the matrix, follow the steps below:

Locking thematrix

The matrix can be locked to prevent changes by entering the number 50 into cell V9-H8.

To lock the matrix, follow the steps below:

Matrix FieldDetails

Not all of the cells in the matrix are used. Below are descriptions for the specific cells that are used to control the operation of the instrument.

Note: To assist in setting a value in a cell, the cursor (the flashing digit to be altered) can be moved from digit to digit, right to left, by pressing the + and – buttons simultaneously.

Press ButtonResultingDisplay Comments

HOME VH 00 Start at “home” cell

V (9 times) VH 90 Move to setup row

H (8 times) VH 98 Move to the “unlock” cell

+ or – (if necessary)

50 “50” unlocks the matrix




H (8 times) VH 98 Move to the “unlock” cell


any number other than 50

“50” unlocks the matrix


Cell Function

Row V0: Channel 1 data and selection of units of measure

V0-H0 Displays moisture, in units selected in cell V0-H1

V0-H1 Enter a number from the list below to select the desired mois-ture units to be displayed in V0-H0. This setting also affects the analog outputs and alarm setpoints. 0 = Td °C, dew point temperature 1 = Td °F, dew point temperature 2 = ppmv 3 = lbs/MMSCF 4 = g/m3

5 = g/kg 6 = % RH 7 = Pressure Td °C 8 = Pressure Td °F11 = mmHg water vapor pressure12 = hPa water vapor pressure

V0-H8 Displays the raw frequency value corresponding to the Channel 1 input (moisture content)

Row V1: Channel 2 data and selection of units of measure

V1-H0 Displays data for Channel 2, normally the temperature

V1-H1 Enter the units of measure for temperature: 0 for °C or 1 for °F.

V1-H8 Displays the raw digital frequency value from the Channel 2 input (temperature)

Row V2: Channel 3 data and selection of unit of measureThe Channel 3 input is optional. Contact the factory for information on using this input.

V2-H0 Displays data for channel 3.

V2-H1 Enter the unit of measure for channel 3.

V2-H8 Displays the raw digital value from the Channel 3 input (if option is installed).

Row V3: Compensation constants


V3-H0 A pressure value from 0.1 to 999.9 bar can be entered to com-pensate concentration units such as ppmv.Example 1: Concentration units are pressure independent. However, the rh sensor measures the water vapor pressure. If the process pressure is increased, for example, by 10 atmospheres (10 times), the water vapor pres-sure will also increase by a factor of 10, (Dalton’s Law depicts that partial pressures increase by the same amount as the total pressure). The sensor monitors this correctly, and as a result a pressure constant of 10 must be entered in cell V3-H0 to correct for this law of physics. If the process pres-sure is fluctuating, a pressure transducer can be connected to the channel 3 input providing real-time pressure compensation. (This requires factory setup or reading the Service Manual).Example 2: Consider a process pressure at 100 bar that uses a by-pass sys-tem which reduces the pressure to near atmospheric pressure. The mea-sured dew point will be much lower under these conditions according to Dalton’s Law (see V3-H0). Entering 100 in V3-H0 and selecting 7 (for °C) or 8 (for °F) in V0-H1 will cause the process pressure dew point to be displayed in V0-H0.

V3-H1 If V3-H0 is used, enter the units of measure for that cell. See cell V0-H1 for a list of the available units.

V3-H2 A constant temperature to be used in calculations for tempera-ture compensation can be entered here. If a temperature mea-surement is provided by the probe on Channel 2, or by another sensor on Channel 3, any temperature constant entered in this field will be ignored.

V3-H3 If a temperature has been entered in cell V3-H2, enter the units of measure for the temperature constant here: 0 = °C, 1 = °F

Row V4 Linearization (Probe calibration)Note: New 2650 systems (analyzer and probe) are shipped with matched components and there is normally no need to enter calibration values. The steps in V4-H0 through V4-H6 are necessary only when connecting a spare probe or a re-calibrated probe.The calibration process uses cells V4-H0 through V4-H6. For channel 1 of the DY55 probe, two calibration points are entered: the dew point in cell V4-H4, and the corresponding fre-quency delivered by the probe’s electronics in matrix field V4-H3. (Up to 15 calibration points can be entered in case of special calibration at multiple points.) Details are shown beginning on page 41.

V4-H0 In this cell, enter the channel that is to be calibrated.

V4-H1 Enter 1. (Entering 0 would copy the entire calibration data con-tents of the previous channel into the current channel).

Cell Function


V4-H2 Enter the number of calibration points to be used (normally 2).

V4-H3 Enter the frequency value of selected point.

V4-H4 Enter the dew point value of the selected point.

V4-H5 Displays the number of the calibration point currently being entered. Press the + button to increase this number and imme-diately jump to V4-H3 to enter the next point. After the last point has been entered, move to V4-H6.

V4-H6 Press + to increase the value to “1” to confirm and store the dis-played calibration numbers. System then jumps immediately to V4 H0.

Row V5 Channel 1 analog output setupThe cells in this row configure the Channel 1 analog output. See page 36 for details.

V5-H0 Select which input channel will drive output channel 1. Enter 1, 2, or 3.

V5-H1 Program the output range: enter the minimum rh % value (cor-responding to 0/4 mA).

V5-H2 Program the output range: enter the full-scale rh % value (cor-responding to 20 mA).

V5-H3 Define the output type: 0 turns the output off, 1 turns it on.

V5-H4 Offset the output range: 0 = 0 to 20 mA1 = 4 to 20 mAVoltage output (with a 249 Ohm load resistor connected) will be 0 to 5 V or 1 to 5 V.

V5-H7 Configure the current to be output if there is a system error: entering 0 sets the output to –10% or 3.6 mA for the event; 1 sets the output to 110% or 22 mA for the event; 2 freezes the output at the last measured value in the event.

Row V6: Channel 2 analog output setup (optional)

V6-Hx Apply the same sequence described for Row V5 to output 2

Row V7: Channel 3 analog output setup (optional)

Cell Function


V7-Hx Apply the same sequence described for Row V5 to output 3

Row V8: Relay setupThe cells in this row configure the three alarm relay outputs. Step by step instructions begin on page 37

V8-H0 Select which input channel will control relay 2. Enter 1, 2 or 3.

V8-H1 Enter the alarm set point for relay 2. For a negative value, use the – button to go below 0.

V8-H2 Enter relay 2’s hysteresis value as a percentage of the measure-ment range (for example, 1 = 1%).



V8-H5 Enter relay 3’s hysteresis value as a percentage of the measure-ment range (for example, 1 = 1%).



V8-H8 Enter relay 4’s hysteresis value as a percentage of the measure-ment range (for example, 1 = 1%)

Cell Function


V8-H9 For each relay, designate whether it should trigger when the measured value is greater than the set point or lower than the set point (high/low alarm). If 0 is chosen, the relay alarms when the measured value is higher than the set point. If 1 is chosen, the relay alarms when the measured value is lower than the alarm set point. Choose the settings for each relay, find the combination in the table below, and enter a number from 0 to 7.Rly 4 Rly 3 Rly 2 0 0 0 = 0 0 0 1 = 1 0 1 0 = 2 0 1 1 = 3 1 0 0 = 4 1 0 1 = 5 1 1 0 = 6 1 1 1 = 7

Row V9 Miscellaneous setup

V9-H0 Displays the error number in case of malfunction in Channel 1. See troubleshooting section for details.



V9-H3 Displays the software version: (e.g., 1.02)

V9-H4 Enable the displayed channel data to be transmitted on the RS-485 communication port once per second, when non-zero.

V9-H5 Perform a relay test. Enter 1 to cycle the system alarm. Enter 2 to cycle relay 2. Enter 3 to cycle relay 3. Enter 4 to cycle relay 4.

V9-H6 Select the fail safe mode: Enter 0 for relays to be de-energized when an alarm is present. Enter 1 for relays to be energized when an alarm is present. Relay number 1 (the system alarm) is also controlled by this setting.

Cell Function


Analog output setupThe following steps configure the Channel 1 analog output (matrix row V5). For Channel 2, use row V6; for Channel 3, use row V7.

The following steps are required:

1. Assign an input channel to control this output.2. Set the minimum and maximum values.3. Turn the output on.4. Select the output current offset (0–20mA or 4–20mA).5. Configure the system fault mode.

First, unlock the matrix by entering “50” into V9-H8 as described on page 36, and then follow the steps given below for Channel 1.

V9-H7 Auto-sequence function. Entering 1 causes the display to sequence through the active input channels. For example, using the DY55 probe, the display would show the dew point value for 5 seconds, then the pressure value (if configured) for 5 seconds and back to dew point for 5 seconds and so on. Enter-ing 0 turns the sequencing function off.

V9-H8 Entering any number other than 50 locks all matrix fields from entering values to prevent tampering.

V9-H9 This field restricts access to programming. Entering 0 puts the instrument into a read-only mode where only certain matrix locations can be read. Entering 1 allows access to User Setup functions. These functions can be modified only if 50 is entered in field V9-H8.

Cell Function


AccessChannel 1

output row

HOME VH 00 Move to home cell

V (5 times) VH 50 Move to “Channel 1 output” row

Assign inputchannel


1 Select channel 1 (or other, if desired)


To set up Channel 2 or 3, follow the same sequence using row V6 for Channel 2, or row V7 for Channel 3.

When you finish programming, it is recommended the you lock the matrix by entering any number other than 50 into cell V9-H8 as described on page 30.

Refer to Figure 14 for wiring to the supplied 249 ohm resistor(s) to facilitate measurements.

Relay setup The following steps configure Relay 2 using cells V8-H0, V8-H1 and V8-H2.

For Relay 3, use cells V8-H3, V8-H4 and V8-H5.

For Relay 4, use cells V8-H6, V8-H7 and V8-H8.

The following steps are required:

1. Assign an input channel to control this relay.

Enterminimum

value

H VH 51 Move to “minimum value” cell

+ or –(if necessary)

Desired mini-mum value

Enter the measured value that should produce 0 or 4 mA output

Entermaximum

value

H VH 52 Move to cell


Desired maxi-mum value

Enter the measured value that should produce 20 mA output

Turn theoutput on

H VH 53 Move to output type


1 Turn output on (0 would turn the output off)

Enter offset H VH 54 Move to “offset” cell


0 or 1 0 = 0–20 mA1 = 4–20 mA

Enter the faultmode

H (3 times) VH 57 Move to cell


0, 1 or 2 0 = –10% 3.6 mA if fault1 = +110% 22 mA if fault2 = Hold freeze if fault


2. Enter the set point.3. Enter the hysteresis.4. For each relay, choose whether it triggers when the measured

value is above or below the set point.

First, unlock the matrix by entering “50” into V9-H8 as described on page 36, and then follow the steps given below for programming all relays.


Access relaysetup row


V (8 times) VH 80 Move to “relay 1” cell

Assign inputchannel



Enter set point H VH 81 Move to “set point” cell


Desired set point

Enterhysteresis



Desired hys-teresis

Move to Relay2

H VH 83 Move to “relay 2” cell

Assign inputchannel



Enter “setpoint”

H VH 84 Move to “set point” cell


Desired set point

Enterhysteresis



Desired hys-teresis

Move to Relay3

H VH 86 Move to “relay 3” cell

Assign inputchannel




For the final entry choose 0 or 1 for each relay, and use the table below to combine these into a single digit (0 – 7).

If 0 is chosen, the relay alarms when the measured value is higher than the set point. If 1 is chosen, the relay alarms when the measured value is lower than the alarm set point. Choose the settings for each relay, find the combination in the table below, and enter a number from 0 to 7.

Rly 4 Rly 3 Rly 2 0 0 0 = 0 0 0 1 = 1 0 1 0 = 2 0 1 1 = 3 1 0 0 = 4 1 0 1 = 5 1 1 0 = 6 1 1 1 = 7

When you finish programming, it is recommended the you lock the matrix by entering any number other than 50 into cell V9-H8 as described on page 30.

Enter “setpoint”

H VH 87 Move to “set point” cell


Desired set point

Enterhysteresis



Desired hys-teresis

Move toAlarm Setup


Enter alarmsetup code

+ or – code (0 – 7; see below)

Code selects whether relays alarm when above or below set point. This single value controls the three relays.


Operation of the relay contacts is summarized below. Relay 2 (the first programmable relay, which controls alarm LED #1) is shown as an example.

Power Alarm Condition

Relay Coil

NO (Normally open) contact

NC (Normally closed) contact

LED #1

Off — — — De-ener-gized

Open Closed — — —

On No Alarm Ener-gized

Closed Open Off

On Relay 2 in alarm state

De-ener-gized

Open Closed On

HygroGuard MMY 2650 Section 4 — Calibration Page 41

Section 4 — Calibration

The MMY 2650 system is shipped with the analyzer precalibrated to the DY55 probe shipped with it. The calibration procedure is necessary only when the probe has to be replaced or recalibrated.

A calibration sheet is supplied with each probe. A sample sheet is shown in Figure 25. Verify that the serial number on the calibration sheet matched the serial number on the probe. Frequency numbers from the sheet are copied into the analyzer during the procedure. Only the numbers circled below are used in the procedure.

Figure 25 — Sample calibration sheet

ProbeSerialNo.

Calibrationdata

Page 42 HygroGuard MMY 2650 Section 4 — Calibration

In the steps below, you may find that when you access a cell to enter a number, the correct number is already there. When this is the case, just move on to the next step and continue.


Unlock matrix HOME VH 00 Start at “home” cell


H (8 times) VH 98 Move to “unlock” cell


50 “50” unlocks the matrix

Enter “UserSetup” mode



1 “1” is user setup mode

Accesscalibration

row


V (4 times) VH 40 Move to “channel select” cell

Select channel + or – (if necessary)

1 Select channel 1

Access “copy”function

H VH 41 Move to “copy” cell

Enable it + or –(if necessary)

1 “1” enables copy function of selected channel

No. ofcalibration

points

H VH 42 Move to next cell


2 Number of calibration points (normally 2 for the DY55 probe)

Enterfrequency #1


+ or – from supplied calibration data (40.0)

Frequency for Point 1

Enter RHValue #1


+ or – from supplied calibration data (+20.0)

Dew point for Point 1

HygroGuard MMY 2650 Section 4 — Calibration Page 43

When this programming is complete, leave user setup mode, as shown below.

Finally, it is recommended that you lock the matrix by entering any number other than 50 into cell V9-H8 as described below.

Next point H VH 45

+ VH 43 Point No. is incremented and unit imme-diately moves back to cell V4-H3 to enter the next point

Enterfrequency #2

+ or – from supplied calibration data (360.0)

Frequency data for Point 2


Enter RHvalue #2

+ or – from supplied calibration data (–100.0)

Dew point for Point 2

All done H Commit 1 Ready to store values

Commitvalues

+ VH 40 Cal values stored; ready for next channel

Leave “UserSetup” mode



H (9 times) VH 99 Move to “service level” cell

+ or – (as necessary)

0 “0” is read-only mode

Lock Matrix H (9 times) VH 98 “Lock/unlock” cell

+ or – (as necessary)

any number other than 50

Lock matrix

Page 44 HygroGuard MMY 2650 Section 4 — Calibration

HygroGuard MMY 2650 Section 5 — RS-485 Connection Page 45

Section 5 — RS-485 Connection

The unit’s RS-485 output can be connected to an RS-232 device such as a Personal Computer as follows.

Components needed:

• RS-232 to RS-485 converter/interface unit

• 2-conductor cable terminating in two-position connector

• RS-232 cable

• 9-pin to 25-pin adapters as required

Connect the units as follows:

1. Connect the RS-232 cable from the PC’s comm port to the 232/485 converter.

2. Connect one wire of the 2-conductor cable from terminal A (or –) of the converter to P3, Pin 1 of the 2350.

P3 is located to the left of the 18-terminal connector in the wiring compartment.

3. Connect the other wire from terminal B (or +) of the converter to P3, Pin 2.

4. Run the PC’s Terminal Emulator program with the following configuration:

1200 baud, 8 data bits, 1 stop bit, no parity, no flow control, TTY generic

An example of the PC’s display (these are the same values shown on the 2650’s display):

–41.6 26.3–41.6 26.2–41.7 26.2–41.7 26.3–41.6 26.4

Page 46 HygroGuard MMY 2650 Section 5 — RS-485 Con-

HygroGuard MMY 2650 Section 6 — Troubleshooting Page 47

Section 6 — Troubleshooting

General problems

Invalid loopcurrent

If the loop current shown on the display or current meter is outside the normal range of 4–20mA (or 0–20 mA, if selected), a problem is indicated.

The process dew point may be out of range.

Solution 1: If the dew point is above +20°C (+68°F), or what-ever the maximum range was set to, the current will go to 22mA (if that fault mode is selected). Apply dry air for a few minutes. If the dew point doesn’t decrease, the cause may be a sensor shorted to the wet side of the moisture spectrum. Consult the factory.

Solution 2: If the dew point is below –80°C (–112°F), or what-ever the minimum range was set to, the current will go to 3.6mA (if that fault mode is selected). Move the sensor into a wetter environment for a few minutes. If the dew point doesn’t increase, the cause may be a defective sensor assem-bly or an electronics malfunction. Consult the factory.

The same approach is valid for the other available units of measure and for the other channels.

Slow responsetime

System response time may become slow if the probe filter is dirty.

Solution: Remove the protective filter cap by turning it counter-clockwise and clean it with air flow or solvent. If the sensor filter is contaminated, clean it with a brush using hot water.

Error codesError conditions are indicated by flashing of the ALARM LED for the affected channel, and the channel value is displayed as dashes. To display the error code for the detected condition, access matrix

Page 48 HygroGuard MMY 2650 Section 6 — Troubleshoot-

cell V9-H0 for Channel 1, V9-H1 for Channel 2, or V9-H2 for Channel 3.

A typical error code display is shown below.

Meanings of displayed error codes are shown below:

These error codes are often displayed in combination as the sum of two codes listed above. Specific problems situations are detailed below:

Figure 26 — Error code

Code Meaning

0 No error

4 Max frequency exceeded

8 Zero frequency

16 Output underrange

32 Output overrange

64 PSAT – underrange

128 PSAT – overrange

Input Signals Resulting Outputs Error Codes

Channel 1Moisture

Channel 2Temperature

Output 1Moisture

Output 2Temperature

Channel1

Channel2

normal normal <4 mA <4 mA 16 16

normal normal >20 mA >20 mA 32 32

HygroGuard MMY 2650 Section 6 — Troubleshooting Page 49

Notes Error codes are driven by the output signal values.

Even if the sensor signal is within the calibration range, the output range may be exceeded at the low or high end, generating the error code.

When an error code is generated, the affected channel displays four dashes instead of a numeric value.

To read Channel 1’s error code, go to cell V9-H0.

To read Channel 2’s error code, go to cell V9-H1.

To read Channel 1’s raw sensor frequency, go to V0-H8. If within the calibration range (–100°C to +20°C), widen the output range (cells V5-H1 and/or V5-H2).

Correctingproblems

If the signal is missing, check for broken wires or loose connections on the probe cable. Connect another probe, if available.

Make sure that the output range values correspond to the unit of measure for the channel. For example, if temperature units are changed from °C to °F, the output range must also be changed.

Signal testIf the system is not operating correctly, use the following procedure to determine whether the analyzer or the probe needs repair:

1. Remove the wiring cover as described on page 13.Warning: This test may involve using tools near exposed AC power wiring on the right side of the wiring area!

2. Connect an oscilloscope to terminal 24 (the red probe wire).

normal missing on on 0 16

normal missing off off 0 0

missing normal on on 88 40

missing normal off off 72 8

Page 50 HygroGuard MMY 2650 Section 6 — Troubleshoot-

3. Observe the signal on terminal 24. The correct response is as follows:

➨ If the terminal 24 signal deviates from the correct sig-nal or is missing, return the analyzer to the factory.

Red wire signal 40-360 Hz

Oscilloscope display

HygroGuard MMY 2650 Section 7 — Maintenance Page 51

Section 7 — Maintenance

Probe replacementIf it is necessary to remove or replace the DY55 probe, open the analyzer covers as described on page 13 and disconnect the wires. Loosen the bushing using two wrenches as described on page 18 and remove the cable.

When replacing the probe, follow the instructions shown on page 18. Be sure to ground the cable shield.

If the probe has been replaced with a different probe, be sure to follow the calibration procedure described beginning on page 41, using the calibration sheet included with the new probe.

Page 52 HygroGuard MMY 2650 Section 7 — Maintenance

HygroGuard MMY 2650 Appendix A — Specifications Page 53

Appendix A — Specifications

Trace Moisture Analyzer MMY 2650 Specification

Electronics: State of the art micro-controller providing utmost flexi-bility to meet application needs.

Standard inputs: 1 (moisture)

Optional input: For pressure transducer providing live pressure compensa-tion or other sensor. Signals: 0/1 to 5V, 0/4 to 20 mA loop powered, or 4 to 20 mA. If live measurement is not avail-able, pressure compensation can be achieved by entering a constant pressure value in matrix cell V3-H0.

Moisture Probe: Interconnects with DY55 probe

User interface: Five push-buttons, easy configuration using a matrix

Display: Alpha-Numeric LCD, displays measured value with units of measure, matrix location and programming instructions, error indication with error code if malfunction occurs; user selectable scanning feature alternating the display every 5 seconds through active channels (3 max)

EMI/RFI/ESD Protection: Full compliance with EN 61326-1

Units of measure (Moisture): dew point °C, °F, ppmv (needs pressure measurement using the optional input for live calculation or pressure constant entered in matrix location V3-H0), lbs/MMSCF, g/m3, g/kg, vapor pressure in hPa, mmHg, rh%, process pres-sure calculated dew point °C, °F (needs temperature measurement using the optional input for live calculation or pressure constant entered in matrix cell V3-H0)

Units of measure (Pressure): Optional input used with a pressure transducer: bara, barg, psia, psig, hPaa, hPag

Analog outputs: 3, each configurable to any input, 0/4 to 20 mA, load resis-tance <500 Ohms, 0/1 to 5 V, source resistance 249 Ohms, user selectable range, user selectable condition in case of error to 110%, -10% or hold at last measured value.

Digital Outputs: 4 relays (SPDT dry contacts rated at 250 V AC, 2.5 A, P AC = 300 VA, cos phi > 0.7, P DC 100W, 100 V DC)1 relay is system alarm 3 relays are configurable to any input

failsafe mode: energized/de-energized selectable, programmable hysteresis, high/low alarm selectable

Page 54 HygroGuard MMY 2650 Appendix A — Specifica-

Serial output: RS-485, update rate once per second

Serial communication: RS-485, needs GEI communication software for setup or diagnostics

Program: Non-volatile memory

Data: EEPROM

Operating and storage temperature: –10°C to 50°C (14°F to 122°F)

Supply power: 85 to 275 VAC, optional 18 to 36 VDC

Power consumption: 5.8 VA for line voltage units2.2 W for DC powered units

Enclosure: Wall mount, IP54, NEMA 12, separate connection compart-ment

Cable entry: PG cable glands PG 9, 2 x PG 11, PG 13

Weight: 1 kg (2.2 lbs)

Additional Specifications for Panel Mount Enclosure

Material: Black anodized aluminum

Dimensions: 144 mm x 144 mm panel (5.67" x 5.67")

Depth: Maximum protrusion at the rear of the panel: 209 mm (8.23"), (depends on panel thickness).

Maximum protrusion at the front of the panel: 8.25 mm (0.32") with bezel

Maximum protrusion at the front of the panel: 32 mm (1.26") with door

Panel cutout: 138 mm x 138 mm (5.43" x 5.43")

Wiring: Same configuration as the wall mount unit, wired in the rear

Mounting: Insert from front into the panel, install the clamps, tighten the clamps’ screws from the rear against the panel using a long screwdriver.

Front panel surface: Overlay with membrane buttons integrated LEDs and clear window for display

HygroGuard MMY 2650 Appendix A — Specifications Page 55

Specifications for DY55 probe

Sensing element: Planar gold/aluminum oxide, capacitance principle, IC electronics

Calibration range: –80°C to +20°C dew point temperature

Recommended recalibration cycle: 6 to 24 months, depending on the application and required accuracy

Calibration error: ± 1°C dew point at +20°C (ambient temperature)

Accuracy: ± 2°C

Repeatability: ± 1°C

Maximum relative humidity: 50% at dew point temperatures above 0°C

Temperature coefficient: < 0.2°C/°C

Drift: <4°C/year

Ambient and storage temperature: –60°C to +50 °C

Nominal operating temperature: –20°C to +40°C

Maximum operating pressure: 350 bar

Helium leak rate: < 10-7 mbar l/s

Maximum gas velocity: 50.0 m/s at 1 bar5.0 m/s at 10 bar0.5 m/s at 100 bar

Signal transmission: Standardized Pulse Frequency Modulation (PFM) via two-wire cable

Probe mounting adapter: Stainless steel 1.4571 with G½ thread (DIN/ISO 228) and O-ring seal out of Fluor Caoutchouc (SMK)

Rating: IP 40

Torque when tightening:50 Nm

Wrench width: 30 mm

Protection: Protective cap with 10 µm filter

Weight: 250 grams

Page 56 HygroGuard MMY 2650 Appendix A — Specifica-

HygroGuard MMY 2650 Appendix B — Warranty and return procedure Page 57

Appendix B — Warranty and return procedure

Warranty General Eastern (the Seller) warrants equipment of its manufacture against defective materials or workmanship for a period of one year from date of shipment. Liability of the Seller under this warranty is limited, at Seller’s option, to:

• Repair or replacement of defective parts at no charge

• Credit adjustment, not to exceed original sales price

This warranty is subject to the following conditions:

• Prompt notification to Seller upon discovery of defects or miss-ing items

• Obtaining a Return Authorization Number from Seller to return defective items to plant as directed

• Return of equipment with freight charges prepaid, or as other-wise agreed

Defects caused by negligence, misuse, improper installation, acci-dent or unauthorized repair or alteration by buyer or user, or any modification, such as changing range resistors, may void this warranty.

This warranty does not include mechanical parts failing from normal usage, nor does it cover limited-life electrical components which deteriorate with age.

This warranty is in lieu of all other warranties, expressed or implied, including the implied warranty of fitness for a particular purpose to the original Purchaser or to any other person. Seller shall not be liable for consequential damages of any kind.

DamagedShipments

In case of shipping damage, it is the Buyer’s responsibility to file a claim. The Buyer should inspect the shipping container upon receipt and note any evidence of damage on the freight waybill. If concealed damage is found after opening the container, the customer should file a claim with the carrier at once. The customer

Page 58 HygroGuard MMY 2650 Appendix B — Warranty

must retain the shipping container and all materials during the life-time of the warranty.

RepairedEquipment

All repairs are warranted for 90 days. Only the repairs and compo-nents replaced as part of these repairs are covered by this warranty. Other repairs or defective parts are covered by the original warranty, if applicable.

The aforementioned provisions do not extend the original warranty of any article which has been either repaired or replaced by the Seller.

InstrumentReturn

Procedure

All General Eastern instruments are fully tested and calibrated prior to shipment. Should a problem with the operation of the equip-ment arise, follow the procedure below:

1. Contact the factory to discuss the problem. In countries other than the U.S., the local agent can also be contacted. Some-times a problem can be resolved by a change in operating pro-cedure or an adjustment to the equipment.

2. If the equipment must be returned to the factory, obtain a return authorization number from General Eastern, and refer-ence the number on the return shipping papers. A written description of the problem should also be included with the instrument.

3. If equipment is not covered by General Eastern’s Warranty Policy, a purchase order should be submitted with the equip-ment returned. The order should cover one of the following:

a. Open order, authorizing repair of equipment to meet published specs. Repair costs will be billed on an actual basis, but will not exceed 50% of the replacement cost without prior customer approval.

b. Order that is not to exceed $500.00 or 30% of the replacement cost, whichever is higher. If repair costs exceed this amount, the customer will be quoted costs before the work is done.

c. Order to cover cost of test and evaluation only. Amount based on type of equipment returned. General Eastern will evaluate but not repair the unit. General Eastern will call

HygroGuard MMY 2650 Appendix B — Warranty and return procedure Page 59

the customer to discuss the evaluation and quote the cost of repair or replacement.

To expedite repairs and reduce costs, General Eastern recom-mends options (a) or (b).

4. After receiving a Return Authorization Number, the equip-ment must be returned freight prepaid.

5. General Eastern reserves the right to apply a minimum ser-vice charge in cases where an instrument is returned for repairs or recalibration, but does not require service.

Returning equipment without a Return Authorization number and Purchase Order significantly delays turnaround time and incurs additional costs. To expedite repairs and reduce costs, please follow the above instructions.

Note: General Eastern guarantees NIST traceability and operation within stated specifications. However, claims regarding accuracy or traceability will be covered under warranty only when verified at General Eastern, or by a fully independent testing laboratory. Exam-ples of independent labs are: National Institute of Standards and Technology in the U.S., and the National Physical Laboratory (NPL) in the U.K.

Page 60 HygroGuard MMY 2650 Appendix B — Warranty

Documents

HygroGuard MMY 2650HygroGuard MMY 2650 Section 1 — Introduction Page 3 Unpacking and Inspection Examine the shipping carton for broken or open packing, distor-tion, or any other