GE Sensing XMTC Operating Manual

GE

Measurement & Control Gas Analysis

XMTC

User’s Manual

910-217 Rev. G

October 2013

XMTC

Thermal Conductivity Binary Gas Transmitter

User’s Manual

910-217 Rev. G
October 2013

www.ge-mcs.com

©2013 General Electric Company. All rights reserved.

Technical content subject to change without notice.

[no content intended for this page]

ii

Preface

Information Paragraphs

Note: These paragraphs provide information that provides a deeper understanding of the situation, but is not

essential to the proper completion of the instructions.

IMPORTANT: These paragraphs provide information that emphasizes instructions that are essential to proper setup of

the equipment. Failure to follow these instructions carefully may cause unreliable performance.

CAUTION! This symbol indicates a risk of potential minor personal injury and/or severe

damage to the equipment, unless these instructions are followed carefully.

WARNING! This symbol indicates a risk of potential serious personal injury, unless these

instructions are followed carefully.

Safety Issues

WARNING! It is the responsibility of the user to make sure all local, county, state and national

codes, regulations, rules and laws related to safety and safe operating conditions are met for
each installation.

Auxiliary Equipment

Local Safety Standards

The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.

Working Area

WARNING! Auxiliary equipment may have both manual and automatic modes of operation. As

equipment can move suddenly and without warning, do not enter the work cell of this equipment
during automatic operation, and do not enter the work envelope of this equipment during
manual operation. If you do, serious injury can result..

WARNING! Make sure that power to the auxiliary equipment is turned OFF and locked out

before you perform maintenance procedures on the equipment.

XMTC User’s Manual iii

Preface

Auxiliary Equipment (cont.)

Qualification of Personnel

Make sure that all personnel have manufacturer-approved training applicable to the auxiliary equipment.

Personal Safety Equipment

Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary equipment.
Examples include safety glasses, protective headgear, safety shoes, etc.

Unauthorized Operation

Make sure that unauthorized personnel cannot gain access to the operation of the equipment.

Environmental Compliance

Waste Electrical and Electronic Equipment (WEEE) Directive

GE Measurement & Control Solutions is an active participant in Europe’s Waste Electrical and Electronic Equipment
(WEEE) take-back initiative, directive 2002/96/EC.

The equipment that you bought has required the extraction and use of natural resources for its production. It may
contain hazardous substances that could impact health and the environment.

In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural
resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or recycle most of the
materials of your end life equipment in a sound way.

The crossed-out wheeled bin symbol invites you to use those systems.

If you need more information on the collection, reuse and recycling systems, please contact your local or regional
waste administration.

Visit http://www.ge-mcs.com/en/about-us/environmental-health-and-safety/1741-weee-req.html
take-back instructions and more information about this initiative.

iv XMTC User’s Manual

for

Contents

Chapter 1. Features and Capabilities

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Basic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.3 Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.4 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.4.1 Packaging and Temperature Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.4.2 2-Port (Sealed Reference Gas) Version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.4.3 4-Port (Flowing Reference Gas) Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.4.4 Sample System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.5 Extra Cable (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.4.6 Power Supply (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.7 TMO2D-TC Display (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.4.8 XDP Display (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.5 Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Chapter 2. Installation

2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.2 Mounting the XMTC Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.3 Mounting the Sample System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.3.1 Manual, 2-Port (Sealed Reference Gas) Sample System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.3.2 Manual, 4-Port (Flowing Reference Gas) Sample System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.3 Sample Systems with Automatic Switching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4 Wiring the XMTC Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.4.1 Grounding the Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.4.2 CE Mark Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.4.3 Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.4.4 Wiring the Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5 Connecting to Other Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.5.1 PS5R-C24 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.5.2 TMO2D Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

2.5.3 XDP Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

2.5.4 Moisture Series Analyzers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

XMTC User’s Manual v

Contents

Chapter 3. Operation and Programming

3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.2 Powering Up the XMTC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.3 Starting the Sample Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.4 Programming with IDM™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.5 The Edit Functions Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.6 Field Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

3.6.1 Perform Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

3.6.2 Configure Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3.6.3 Calibration Drifts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.6.4 Clear Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

3.6.5 Hold Last Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

3.7 4-20 mA Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.7.1 4-20 mA Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.7.2 4 and 20 mA Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

3.7.3 4-20 mA % Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

3.7.4 % Gas Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

3.8 Error Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

3.8.1 Total Drift Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

3.8.2 Drift/Cal Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

3.8.3 Gas mV Under/Over Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

3.8.4 Gas % Under/Over Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

3.9 Factory Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

3.9.1 Edit # of Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

3.9.2 Edit Point X. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

3.10 The Advanced Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

3.10.1 Fast Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

3.10.2 Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

3.10.3 Meter ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Chapter 4. Calibration

4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

4.2 Gas Ranges and Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

4.3 Required Equipment and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

4.4 Preparing the Transmitter for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

4.5 2-Port (Sealed Reference Gas) Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

4.6 4-Port (Flowing Reference Gas) Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Chapter 5. Specifications

5.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

5.2 Functional. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

5.3 Physical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

5.4 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

vi XMTC User’s Manual

Contents

Appendix A. Supplemental Information

A.1 Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

A.2 Calibration Specification Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

A.3 XMTC PCB Subassemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

A.4 Sample Calibration Sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

A.5 Relative Thermal Conductivity of Common Gases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Appendix B. Typical Applications

B.1 H2 in N2 in Heat Treat Furnace Atmospheres. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

B.1.1 Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

B.1.2 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

B.1.3 Basic Operating Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

B.1.4 Permanent Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

B.1.5 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

B.1.6 Detailed Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 1

B.2 H2 Purity in H2-Cooled Electricity Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

B.2.1 Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

B.2.2 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

B.2.3 Basic Operating Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

B.2.4 How Previously Handled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

B.2.5 Permanent Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

B.2.6 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

B.2.7 Detailed Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 6

Appendix C. Installation and Wiring Diagrams

Appendix D. The Enhanced Advanced Option

D.1 Entering the Enhanced Advanced Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

D.2 Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

D.3 Balance Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

D.4 Factory Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

D.5 Temperature Comp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

Appendix E. CE Mark Compliance

E.1 CE Mark Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

E.2 EMI Filter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

E.3 Wiring the Signal Connections for the Weatherproof Version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

E.4 Wiring the Signal Connections for the Explosion/Flameproof Version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Appendix F. Certifications

F.1 EC-Type Examination Certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

F.2 IECEx Certificate of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

XMTC User’s Manual vii

Contents

[no content intended for this page]

viii XMTC User’s Manual

Chapter 1. Features and Capabilities

Chapter 1. Features and Capabilities

1.1 Introduction

This chapter introduces you to the features and capabilities of the GE XMTC Thermal Conductivity Transmitter. The
following topics are discussed:

• Basic features of the XMTC thermal conductivity transmitter

• Theory of operation

• A system description of the XMTC, available options, and sample systems Information on optional

components is also provided, including a 24 VDC power supply, extra cable, and the TMO2D-TC Display.

• A brief discussion of typical XMTC applications

XMTC technical specifications can be found in Chapter 5, Specifications. Ordering information can be found in
Appendix A, Supplemental Information.

1.2 Basic Features

The XMTC is a transmitter that measures the thermal conductivity of a binary (or pseudo-binary) gas mixture

•

containing hydrogen, carbon dioxide, methane or helium, and provides a 4-20 mA signal proportional to the
concentration of one of the gases in the mixture. It offers several unique design features:

• Ultra-stable thermistors and a temperature-controlled measuring cell (55°C/131°F standard, 70°C/158°F

optional) provide excellent zero and span stability, as well as tolerance of ambient temperature variations.

• The measuring cell design makes it highly resistant to contamination and flow vibrations. Since it has no

moving parts, the transmitter can handle the shock and vibration found in many industrial applications.

• A 2-port version for measurement of zero-based gas mixtures using a sealed reference gas (air or nitrogen) and

a 4-port version for measurement of zero-suppressed gas mixtures (and some other special calibrations) using a
flowing reference gas are available.

• The XMTC modular construction means that the unit can be field-calibrated quickly and easily. If desired, the

plug-in measuring cell can be replaced with a pre-calibrated spare in minutes.

• The XMTC transmitter, with weatherproof or explosion-proof packaging, is designed to be installed as close as

possible to the process sample point. It can be located up to 4000 ft (1200 m) from a display or recorder, using
inexpensive unshielded cable.

XMTC User’s Manual 1

Chapter 1. Features and Capabilities

0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

SO

2

CO

2

Air/N

2

CH

4

Ne

He

H

2

C

4

H

6

1.3 Theory of Operation

The XMTC measures the concentration of a gas in a binary gas mixture by measuring the thermal conductivity of the
sample gas and comparing it to the thermal conductivity of a selected reference gas.

Two ultra-stable, glass-coated thermistors are used: one in contact with the sample gas, and the other in contact with a
selected reference gas. The thermistors are mounted so that they are in close proximity to the stainless steel walls of the
sample chamber. The entire sensor is heated to 55°C/131°F, (or 70°C/158°F) and the thermistors are heated above the
sensor temperature using a constant current source. The thermistors lose heat to the walls of the sample chamber at a
rate that is proportional to the thermal conductivity of the gas surrounding them. Thus, each thermistor will reach a
different equilibrium temperature. The temperature difference between the two thermistors is detected in an electrical
bridge circuit. It is then amplified and converted to a 4-20 mA output proportional to the concentration of one of the
constituents of the binary gas mixture. For example:

• To measure 0 to 25% H

calibration, the zero gas would be 100% N

• To measure 90-100% H

the zero gas would be 90% H

Note: The XMTC has polarity adjustment jumpers which permit the measurement of gases (such as CO

relative thermal conductivity less than air/nitrogen.

Appendix A, Supplemental Information, contains a table of Relative Thermal Conductivity of Common Gases. Figure 1
below shows some of these values graphically.

in N2, the reference gas would be air (2-port version, sealed reference gas), and for

2

(i.e. 0% H2) and the span gas would be 25% H2 in N2.

2

in N2, the reference gas would be 100% H2 (4-port version, flowing reference gas),

2

in N2, and the span gas would be 100% H2 (the same as the reference gas).

2

) that have a

2

Figure 1: Relative Thermal Conductivity of Some Common Gases

2 XMTC User’s Manual

Chapter 1. Features and Capabilities

1.4 System Description

The basic XMTC measurement system consists of an XMTC Transmitter mounted in a sample system. The sample
system is mandatory, and can either be provided by GE or constructed according to GE recommendations. The XMTC
is supplied with a standard 10 ft (3 m), 4-wire cable for power and output connections, with lengths up to 4000 ft
(1200 m) available. Optionally available from GE are a 24-VDC power supply to power the XMTC, a remote display
with programming and control capabilities, and several analyzers which can be interfaced with the XMTC.

1.4.1 Packaging and Temperature Rating

The XMTC transmitter is self-contained, consisting of the thermal conductivity sensor and associated electronics. It
requires 24 VDC power (1.2 A maximum at power-up), and provides a 4-20 mA output signal proportional to the
concentration of one of the gases in the binary sample gas mixture.

The XMTC is designed to be installed in a sample system as close as possible to the process sample point. Thus, it is
available in two environmental packages:

• Weatherproof

• Explosion-proof (with the addition of flame arrestors to the sample/reference gas inlet and outlet)

Each environmental package is available in a standard 2-port (sealed reference gas) version, or an optional 4-port
(flowing reference gas) version.

The XMTC is supplied with a standard measurement cell operating temperature of 55°C (131°F). An optional 70°C
(158°F) cell operating temperature is available.

Note: The 70°C (158°F) operating temperature should be selected only for high temperature applications, because it

results in reduced sensitivity.

XMTC User’s Manual 3

Chapter 1. Features and Capabilities

1.4.2 2-Port (Sealed Reference Gas) Version

This standard configuration (see Figure 2 below) is used for zero-based ranges with air or nitrogen at atmospheric
pressure as the balance or background gas. It utilizes air with desiccant in a factory sealed chamber as the reference gas.
The following standard ranges and gases are available:

Ranges: 0-2% Gases: H

0-5% CO
0-10% SO
0-25% He in N
0-50% Argon in N
0-100%

50-100%
80-100%
90-100%
95-100%
98-100%

in N2 or air

2

in N2 or air (min. range 0-5% CO2)

2

in air (min. range 0-2% SO2)

2

or air

2

or air

2

Figure 2: 2-Port (Sealed Reference Gas) XMTC

4 XMTC User’s Manual

Chapter 1. Features and Capabilities

1.4.3 4-Port (Flowing Reference Gas) Version

This optional configuration shown in Figure 3 below is used for zero-suppressed ranges and some other special
applications. Typically, a flowing reference gas of 100% H

are available:

or CO2 is used. The following standard ranges and gases

2

Ranges: 90 to 100% Gases: H

in N

2

2

80 to 100% CO2 in N2 or air

He in N

or air

2

Note: For factory calibration pricing on the standard ranges and gases, or for pricing on other zero-suppressed

ranges and gases, please consult the factory.

Figure 3: 4-Port (Flowing Reference Gas) XMTC

XMTC User’s Manual 5

Chapter 1. Features and Capabilities

1.4.4 Sample System

Use of a sample system is mandatory with the XMTC. The design of the sample system depends on the conditions of
the sample gas and the requirements of the application. In general, a sample system must deliver a clean, representative
sample to the XMTC at a temperature, pressure and flow rate that are within acceptable limits. Standard XMTC sample
conditions are as follows:

• Temperature less than 50

o

C (122oF) for 55oC cell operating temperature

• Atmospheric pressure

• Flow rate 0.5 SCFH (250 cc/min)

GE offers sample systems for a wide variety of applications. Two standard sample systems for the XMTC are shown in
Chapter 2, Installation. For assistance in designing your own sample system, please consult the factory.

1.4.5 Extra Cable (optional)

GE provides a 10 ft (3 m) length of 4-wire, color-coded cable with each XMTC to connect the power and outputs.
Optional cables are available in lengths up to 4000 ft (1200 m). If you are using your own cable, refer to Table 1 on
page 13 for recommendations.

1.4.6 Power Supply (optional)

The XMTC requires 24 VDC at a maximum start-up current of 1.2 A. The GE PS5R-C24 power supply converts
100/120/220/240 VAC to the required 24 VDC for the XMTC.

1.4.7 TMO2D-TC Display (optional)

The GE TMO2D-TC Display provides a two-line x 24 character back-lit LCD. It also features display and option
programming, recorder outputs, alarm relays, and relays for driving sample system solenoids for automatic zero and
span calibration of the XMTC. For information on the TMO2D-TC, please contact GE.

1.4.8 XDP Display (Optional)

The GE XDP Explosion-proof Display provides an integral, voltage-stabilized 24 VDC power supply, a 3-digit display
with adjustable 4-20 mA input range, two SPDT alarm relays rated for 1 A/250 VAC, and a 4-20 mA output that is
isolated from the input and adjustable to a second independent range if required. For information on the XDP, please
contact GE.

6 XMTC User’s Manual

Chapter 1. Features and Capabilities

1.5 Typical Applications

The XMTC can be used in a wide variety of industrial applications where it is necessary to measure the concentration
of one component of a binary gas mixture. It can also be used in pseudo-binary gas mixtures where the ratio of
concentrations of the background gas components remains constant, and in gaseous mixtures where the thermal
conductivity of the gas of interest is significantly different from that of the background gas. Some typical industries and
applications include:

• Metals Industry -

H

in heat treat furnace atmospheres

2

• Electric Power Industry -

H

in generator cooling systems

2

• Gas Production Industry -

Purity monitoring of argon, hydrogen, nitrogen, helium

• Chemical Industry -

in ammonia synthesis gas

H

2

in methanol synthesis gas

H

2

in chlorine plants

H

2

• Food Industry -

in fermentation processes

CO

2

Ethylene Oxide (ETO) sterilization

• Steel Industry -

H

in blast furnace top gas

2

• Petroleum Industry -

H

in hydrocarbon streams

2

Two very common applications are:

• H

• H

For more details on these applications, refer to Appendix B, Applications. For details on applications not shown in
Appendix B, or if you wish to discuss your own application, please contact GE.

in N2 in heat treat furnace atmospheres: zero-based 0-25% H2, 2-Port (sealed reference gas, air)

2

purity in H2 electricity generator cooling: zero-suppressed, 80-100% H2, 4-Port (flowing reference gas,

2

100% H

)

2

XMTC User’s Manual 7

Chapter 1. Features and Capabilities

[no content intended for this page]

8 XMTC User’s Manual

Chapter 2. Installation

Chapter 2. Installation

2.1 Introduction

This chapter describes how to install the XMTC transmitter and its sample system. It also contains information on
connecting the XMTC to optional system components. The following topics are discussed:

• Mounting the XMTC transmitter

• Installing a GE sample system

• Wiring the XMTC transmitter

• Connecting the XMTC transmitter to optional components

2.2 Mounting the XMTC Transmitter

This section applies only if you are mounting the XMTC transmitter in a sample system that has not been supplied by
GE.

Your sample system should deliver a clean, representative sample to the XMTC at the proper temperature, pressure and
flow rate. This usually means a clean, dry sample (free of solid and liquid particulates) at atmospheric pressure; a
temperature no greater than 50°C (122°F); and a flow rate of approximately 0.5 SCFH (250 cc/min). Since factory
calibration of the sensor is at atmospheric pressure and 0.5 SCFH, higher or lower operating pressure may necessitate
field-calibration adjustment.

A simple sample system for a 2-Port XMTC might have inlet and outlet flow-regulating needle valves, a flow meter,
and a pressure gauge, in addition to the XMTC transmitter.

The XMTC transmitter should be mounted in the sample system so that it is upright and level to within ±15°. Also,
provide at least 9 in. (230 mm) of clearance above the top cover of the transmitter to allow access to the transmitter
printed circuit board (PCB) for calibration and maintenance. For a 2-Port XMTC, connect the sample system Sample

Inlet and Sample Outlet ports to the appropriate XMTC port. For a 4-Port system, also connect the Reference Inlet and
Reference Outlet ports to the appropriate XMTC ports.

Note: Refer to Appendix C, Installation and Wiring Diagrams, for port locations and other information.

WARNING! Be sure your installation conforms to all safety and electrical code requirements.

XMTC User’s Manual 9

Chapter 2. Installation

SPAN GAS

INLET

9.00

(229.5)

(MIN)

TRANSMITTER

SAMPLE GAS

INLET

ZERO GAS

INLET

SAMPLE GAS

OUTLET

2.3 Mounting the Sample System

You can order a complete sample system from the factory. This includes the XMTC transmitter and all necessary
components and sample tubing mounted on a metal panel. Several standard sample systems are available, and
custom-designed sample systems can be built to your exact specifications.

Mount the sample system as close to the process sample point as possible. Once the sample system is mounted, connect
all inlet and outlet lines via the 1/4” compression fittings on the sample system. The sample line leading from the
process to the sample system should be of 1/4” stainless steel tubing, and should be as short as possible in order to
ensure a representative sample.

Following are descriptions of two standard sample systems:

2.3.1 Manual, 2-Port (Sealed Reference Gas) Sample System

Figure 4 below shows a basic sample system for a 2-Port (sealed reference gas) XMTC. This sample system consists of
inlet needle valves for sample, zero, and span gases; a ball valve; a 2-port XMTC; a pressure gauge; and a flowmeter.
All components are mounted on a painted steel plate. Other components could be added for filtration (filter/coalescer),
pressure control (regulator), or flow control (pump).

Figure 4: Basic 2-Port Sample System (732-164)

10 XMTC User’s Manual

Chapter 2. Installation

9.00

(229.5)

(MIN)

TRANSMITTER

2.3.2 Manual, 4-Port (Flowing Reference Gas) Sample System

Figure 5 below shows a basic sample system for a 4-Port (flowing reference gas) XMTC. This sample system consists
of inlet needle valves for sample, reference, and calibration gases; a 4-port XMTC; two pressure gauges; and two flow
meters. All components are mounted on a painted steel plate. Other components could be added for filtration
(filter/coalescer), pressure control (regulator), or flow control (pump).

Figure 5: Basic 4-Port Sample System (732-028)

2.3.3 Sample Systems with Automatic Switching

Also available from GE are sample systems with electrically-actuated, three-way solenoid valves. When used in
conjunction with a TMO2D or XDP Display (with the Auto Cal option), these systems allow automatic switching of
sample, zero, span, and reference gases during operation and calibration. Refer to Appendix B, Applications, for details
on sample systems designed by GE for specific applications.

XMTC User’s Manual 11

Chapter 2. Installation

External Ground Screw

2.4 Wiring the XMTC Transmitter

CAUTION! Always apply power to the XMTC immediately af ter installation, espe cially when it is

mounted outdoors or in a humid area.

This section describes how to wire the XMTC for 24 VDC power, RS232 communication, 4-20 mA output, and
optional devices.

2.4.1 Grounding the Enclosure

WARNING! The XMTC transmitter enclosure must be properly grounded.

Connect the external ground screw on the XMTC enclosure (see Figure 6 below) to a suitable earth ground.

Figure 6: Ground Screw Location

12 XMTC User’s Manual

Chapter 2. Installation

2.4.2 CE Mark Compliance

WARNING! To meet CE Mark requirements, you must shield and ground all electrical cables as

described in Appendix E.

WARNING! CE Mark compliance is required for all units installed in EU countries.

WARNING! Cable entries of an approved flameproof design are required. These must be

installed according to the manufacturer’s instructions. The choice of cable entry device may limit
the overall installation category achieved.

2.4.3 Cable Specifications

Table 1 below shows the transmitter wiring connections for the standard GE XMTC cable, P/N X4(10). This cable can
be used for distances up to 4000 ft (1200 m).

Table 1: GE 4-Wire XMTC Cable

Lead Color AWG Terminal

+24 VDC Line Red 22 TB1-1

24 VDC Return Black 22 TB1-2

4-20 mA (+) White 22 TB1-3

4-20 mA (-) Green 22 TB1-4

If you are using your own cable to wire the XMTC, refer to Table 2 below for the cable requirements.

Table 2: Non-GE 4-Wire XMTC Cable

Maximum Cable Length Wire Size

ft m AWG mm

2

450 130 22 0.35

700 200 20 0.60
1,050 320 18 1.00
1,700 500 16 1.20
2,800 850 14 2.00
4,000 1,200 12 3.00

XMTC User’s Manual 13

Chapter 2. Installation

TB1

TB2

SIGNAL CONNECTIONS

1
2
3
4
1
2
3

+24VDC Line (red) 1

24VDC Return (black) 2

+4 to 20 mA (white) 3

–4 to 20 mA (green) 4

RS232 RX (red) 1

RS232 TX (white) 2

RS232 GND (green) 3

2.4.3 Cable Specifications (cont.)

Table 3 below shows the connections for the GE standard 3-wire RS232 cable (P/N 704-668), which is available with a
male or female DB-9 or a DB-25 connector. This cable is available in standard lengths of 6 ft (2 m) and 12 ft (4 m).

Table 3: GE 3-Wire RS232 Cable

Lead Color AWG Terminal

RX Red 22 TB2-1
TX White 22 TB2-2

GND Green 22 TB2-3

Note: See EIA-RS Serial Communications (document 916-054) for detailed RS232 wiring instructions.

2.4.4 Wiring the Signal Connections

The XMTC power input, analog output, and RS232 connections are made to terminal blocks TB1 and TB2, which are
accessed by removing the XMTC cover. See Figure 7 below for the location and pin designations for terminal blocks
TB1 and TB2. Also refer to Appendix C, Installation and Wiring Diagrams.

CAUTION! Do not make any connections to unassigned or unused terminals.

Figure 7: XMTC Signal Wiring Connections

14 XMTC User’s Manual

Chapter 2. Installation

2.4.4 Wiring the Signal Connections (cont.)

Use the following steps to make the proper wiring connections:

WARNING! Cable entries of an approved explosion-proof design are required. These must be

installed according to the manufacturer’s instructions. The choice of cable entry device may limit
the overall installation category achieved.

1. Install the selected cable entry device, such as conduit or seal-off, in accordance with the manufacturer’s

instructions.

Note: If installation of the cable entry device is only partially complete, GE recommends tagging the device to ensur e

the safety of subsequent users.

2. Route the cable into the XMTC.

3. Unplug the TB1 and TB2 connectors by pulling them straight off the PCB, and loosen the screws on the sides

of the connectors.

4. Connect the power leads:

CAUTION! Connecting the +24 VDC line (red) lead to any terminal except TB1-1 will damage

the XMTC.

a. Insert the 4-wire cable +24 VDC line (red) lead into pin TB1-1 and tighten the screw.
b. Insert the 4-wire cable 24 VDC return (black) lead into pin TB1-2 and tighten the screw.

5. Connec t the an alog output leads:
a. Insert the 4-wire cable + 4-20 mA (white) lead into pin TB1-3 and tighten the screw.
b. Insert the 4-wire cable – 4-20 mA (green) lead into pin TB1-4 and tighten the screw.

IMPORTANT: You can use either an RS232 serial port (discussed in Step 6) or an RS485 serial port (discussed in Step 7),

but not both.

6. Connect the RS232 serial port leads:
a. Insert the 3-wire cable RX (red) lead into pin TB2-1 and tighten the screw.
b. Insert the 3-wire cable TX (white) lead into pin TB2-2 and tighten the screw.
c. Insert the 3-wire cable GND (green) lead into pin TB2-3 and tighten the screw.

XMTC User’s Manual 15

Chapter 2. Installation

Jumper J7

Jumper J8

RX 1

TX 2

GND 3

1 TD OUT
2
3
4 RD IN

XMTC (TB2) RS485 Converter

Red

White

Green

2.4.4 Wiring the Signal Connections (cont.)

7. Connect the RS485 serial port leads.
a. Locate the jumpers J7 and J8 on the main PCB, using Figure 8 below as a guide. Move the jumpers from

the left (RS232) side to the right (RS485) side.

b. Connect the other end of the cable to the RS485 converter, as shown in Figure 8 below.

Figure 8: Jumper Locations and RS485 Connections

8. Carefully plug the TB1 and TB2 connectors back onto the PCB, and reinstall the cover on the XMTC.

9. Connect the other ends of the cables to the 24 VDC power supply, the 4-20 mA input of the display device, and

the serial port of the computer or terminal (see the instruction manuals for those devices for details).

16 XMTC User’s Manual

Chapter 2. Installation

Line
AC2

Neut
AC1

PS5R-C24

24 Volt

Power Supply

+24
VDC

GND

GND

GND

Neut
AC1

Line
AC2

AC Input

XMTC Transmitter

Red

Output
Device

Green

White

Black

TB1-1

+Vin

Black

TB1-2

RTN

White

TB1-3

4-20+

Green

TB1-4

4-20-

Red

TB2-1

RX

White

TB2-2

TX

Green

TB2-3

GND

RS232

Terminal

or PC

2.5 Connecting to Other Components

This section gives interconnection details for using other GE devices in conjunction with your XMTC.

2.5.1 PS5R-C24 Power Supply

The GE 24-Volt power supply converts 100/120/220/240 VAC to 24 VDC for use with the XMTC. Figure 9 below
shows an interconnection diagram for the XMTC and the PS5R-C24 power supply.

Figure 9: Interconnection Diagram

XMTC User’s Manual 17

Chapter 2. Installation

2.5.2 TMO2D Display

The GE TMO2D Display provides a two-line x 24 character back-lit LCD. It also features display and option
programming, recorder outputs, alarm relays, and optional relays for driving sample system solenoids for automatic
zero and span calibration of the XMTC. See Figure 72 on page 83 for an interconnection diagram for the XMTC and
the TMO2D, and refer to the TMO2D User’s Manual (910-084) for details on its operation.

2.5.3 XDP Display

The XDP Explosion-proof Display Package provides an integral, voltage-stabilized 24 VDC power supply, a 3-digit
display with adjustable 4-20 mA input range, two SPDT alarm relays rated for 1 A/250 VAC, and a 4-20 mA output
that is isolated from the input and adjustable to a second independent range if required. The XDP is supplied in a
weatherproof and explosion-proof enclosure that is rated for EEx d IIC T6 and IP66. See Figure 72 on page 83 for
interconnection diagrams for the XMTC and the MIS-1, MIS-2 and MMS-3 analyzers, and refer to the XDP User’s
Manual (910-204) for details on its operation.

2.5.4 Moisture Series Analyzers

The GE Moisture Image Series 1 (MIS-1) and Moisture Monitor Series 3 (MMS-3) analyzers accept inputs from a
variety of sensors (including the XMTC) and offer new graphical and digital user interfaces, improved performance,
and low range calibration. See Figure 72 on page 83 for interconnection diagrams for the XMTC and the MIS-1 and
MMS-3 analyzers, and refer to the appropriate User’s Manual for details on operating the MIS-1 (910-108) or MMS-3
(910-110) analyzer.

18 XMTC User’s Manual

Chapter 3. Operation and Programming

Chapter 3. Operation and Programming

3.1 Introduction

This chapter provides information on operating the XMTC transmitter. The following topics are discussed:

• Powering up the XMTC

• Basic sample gas considerations

• Programming the XMTC with GE Instrument Data Manager (IDM™) software

If you have not already done so, please read Chapter 2, Installation, for details on mounting and wiring the XMTC and
the sample system.

3.2 Powering Up the XMTC

WARNING! It is the responsibility of the user to ensure that all cable entry devices and covers

are properly installed and secure prior to applying power to the XMTC.

The XMTC does not have a power switch. It begins operating as soon as it is connected to a 24 VDC power source.
Because the XMTC is controlled at a constant 55°C (131°F) operating temperature, allow 30 minutes for the unit to
warm up and reach temperature stability. During this time, you can establish a sample gas flow through the sample
system.

3.3 Starting the Sample Gas

Open the necessary valves to establish a sample gas flow of 0.5 SCFH (250 cc/min) at atmospheric pressure. Make sure
that nothing obstructs the flow of sample gas, thereby causing a pressure buildup in the sensing chamber. For proper
operation, the XMTC should be vented to atmosphere.

Note: Unless otherwise specified, the XMTC is factory calibrated at atmospheric pressure and 0.5 SCFH

(250 cc/min) and should therefore be operated at atmospheric pressure. Operating the XMTC at any other
pressure will necessitate a field calibration at that pressure in order to maintain accuracy. See Chapter 4,

Calibration, for more information.

If you are using the 4-Port (flowing reference gas) configuration, open the necessary valves to establish a reference gas
flow of 0.5 SCFH (250 cc/min) at atmospheric pressure.

Note: If desired, you can use a reference gas flow as low as 5 cc/min to conserve gas.

XMTC User’s Manual 19

Chapter 3. Operation and Programming

3.4 Programming with IDM™

The XMTC is factory-programmed and ready for immediate use. However, if you wish to check or change the
calibration, you can access the XMTC programming from your PC, using GE Instrument Data Manager (IDM)
software. IDM also allows you to upload or download site files, display data, and log and view real-time data and
diagnostic data in numeric, bar chart or line chart formats. For further information on the display and logging functions,
refer to the Instrument Data Manager User’s Manual (910-185).

Note: Be sure to install Instrument Data Manager on your PC before attempting to program the XMTC.

3.5 The Edit Functions Menu

To access the XMTC calibration, you must open the Edit Functions menu in the Instrument window. See Chapter 5,
Using the Instrument Menu, in the Instrument Data Manager User’s Manual for more information on the Instrument

Menu. The menu consists of the five commands shown in Figure 10 below. To access a command, select it from the list
of options.

Note: While following the programming instructions, refer to Figure 51 on page 41 and Figure 52 on page 42.

Figure 10: Edit Functions Menu

Three buttons appear on the right side of all menu windows: Previous Item, Next Item/Enter, and Exit Page (see
Figure 11 on page 21):

• Clicking on Previous Item returns you to the previous window (either the command menu or the previous

parameter entered).

• Next Item/Enter confirms the selection or data entered, and either opens the next window or returns you to the

command menu (depending on your position in the program).

• Exit Page returns you to the command menu.

20 XMTC User’s Manual

Chapter 3. Operation and Programming

3.6 Field Cal

When you select the Field Cal command, a window similar to the one in Figure 11 below opens.

Figure 11: Field Cal Window

The Field Cal command offers five options:

• Perform Cal — enables you to calibrate the XMTC with IDM

• Configure Cal — enables you to set the calibration type and parameters

• Calibration Drifts — indicates drift percentages for the zero and span gases

• Clear Calibration — enables you to clear the last calibration

• Hold Last Value — causes the XMTC to hold the last value calibrated.

Clicking on any option opens that option, while clicking on Next Item/Enter opens the menu listed on the status line
above the options.

3.6.1 Perform Cal

Click on Perform Cal to open a window similar to Figure 12 below.

Figure 12: Perform Cal Window

XMTC User’s Manual 21

Chapter 3. Operation and Programming

3.6.1 Perform Cal (cont.)

Click on Zero Field Cal to calibrate the zero value, or on Span Field Cal to calibrate the span value. In either case, a
window similar to Figure 13 below opens.

Figure 13: Field Cal Execution Window

Click Yes to calibrate, or Abort Field Cal to stop the calibration and return to the previous menu. The result of a
completed calibration is shown in Figure 14 be low.

Figure 14: Field Cal Results Window

Click on Previous Item or on Next Item/Enter to return to the previous window, or on Exit Page to return to the
Instrument Menu.

22 XMTC User’s Manual

Chapter 3. Operation and Programming

3.6.2 Configure Cal

The Configur e Cal comman d enables you to ch ange the field calibration type and parame ters: the percentage of zero or
span gas, delay time before or after, and maximum total drift and drift of calibration. When you click on Configur e Cal,
a window similar to Figure 15 below opens. Clicking on any option opens the window for that option, while clicking
on Next Item/Enter opens the menu listed on the status line above the options.

Figure 15: Configure Cal Window

3.6.2a Field Cal Type

The window for Field Cal Type is similar to Figure 16 below.

Figure 16: Field Cal Type Window

Click on 1 Point to select 1-Point (offset, or 1-gas) calibration, or on 2-Point to select 2-Point (zero/span, or 2-gas)
calibration. Then, click on any button on the right to return to the Configure Cal window.

XMTC User’s Manual 23

Chapter 3. Operation and Programming

3.6.2b Field Cal Percent

The window for Field Cal Percent is similar to Figure 17 below.

Figure 17: Field Cal Percent Window

Click on Zero Field Cal to enter the zero percentage, or on Span Field Cal to enter the span percentage. In either case,
a window similar to Figure 18 below opens.

Figure 18: Gas Percentage Entry Window

T ype the desired percentage in the text box, and click Next Item/Enter to confirm the entry. (Click Previous Item or Exit
Page to close the window without changing the percentage.)

24 XMTC User’s Manual

Chapter 3. Operation and Programming

3.6.2c Before Delay Time and After Delay Time

The windows for both Before Delay Time and After Delay Time are similar to Figure 19 below.

Figure 19: Before Delay Time Window

For either time, click on Zero Field Cal to enter the delay time for the zero calibration, or on Span Field Cal to enter the
time for the span calibration. A window similar to Figure 20 below opens.

Figure 20: Delay Time Entry Window

Enter the desired number of minutes and seconds in the text box, and click Next Item/Enter to confirm the entry. (Click
Previous Item or Exit Page to close the window without changing the percentage.) You are then returned to the
Configure Cal window.

XMTC User’s Manual 25

Chapter 3. Operation and Programming

3.6.2d Max Total Drift and Max Drift/Cal

Max Total Drift is the maximum total drift allowable as a percentage of full scale, while Max Drift/Cal is the maximum
drift allowable per calibration as a percentage of full scale. The windows for both Max Total Drift and Max Drift/Cal
are similar to Figure 21 below.

Figure 21: Max Total Drift Entry Window

Enter the desired percentage of full scale in the text box, and click Next Item/Enter to confirm the entry . (Click Previous
Item or Exit Page to close the window without changing the percentage.) You are then returned to the Configure Cal

window.

3.6.3 Calibration Drifts

The Calibration Drifts command enables you to view the drift of both zero and span gases since the last calibration. A
window similar to Figure 22 below opens.

Figure 22: Calibration Drifts Window

Click on any button to return to the Field Cal window.

26 XMTC User’s Manual

Chapter 3. Operation and Programming

3.6.4 Clear Calibration

The window for the Clear Calibration command is similar to Figure 23 below.

Figure 23: Clear Calibration Window

Click on Yes to clear the most recent calibration, or on No, Previous Item or Exit Page to close the window without
clearing the calibration. If you click on Yes and then on Next Item/Enter, a window similar to Figure 24 below open s.

Figure 24: Typical Cleared Calibration Window

Click on Previous Item to return to the Clear Calibration window, or on Next Item/Enter or Exit Page to return to the
Field Cal window.

3.6.5 Hold Last Value

Besides performing a calibration or configuring values, you can program the XMTC to hold the last calibrated value.
From the Field Cal window (see Figure 11 on page 21), click on Hold Last Value. The window remains the same,
except that the button changes to Disable Hold Last. Click Next Item/Enter to confirm the entry, or Previous Item or
Exit Page to close the window without changing the value.

XMTC User’s Manual 27

Chapter 3. Operation and Programming

3.7 4-20 mA Output

The 4-20 mA Output command enables you to modify the output that the XMTC sends to an external device such as a
recorder or digital multimeter. When you click on the 4-20 mA Output command from the Edit Functions menu
(Figure 10 on page 20), a window similar to Figure 25 below opens. Clicking on any option opens the window for that
option, while clicking on Next Item/Enter opens the menu listed on the status line above the options.

Figure 25: 4-20 mA Output Window

3.7.1 4-20 mA Range

The window for 4-20 mA Range is similar to Figure 26 below.

Figure 26: 4 mA Output Gas Percentage Window

Enter the desired percentage of gas for the 4 mA output in the text box. Clicking on Next Item/Enter opens the window
for the 20 mA output, shown in Figure 27 on page 29.

28 XMTC User’s Manual

Chapter 3. Operation and Programming

3.7.1 4-20 mA Range (cont.)

Figure 27: 20 mA Output Gas Percentage Window

Enter the desired percentage of gas for the 20 mA output, and click Next Item/Enter to confirm the entry. The next
prompt is: “Clamp 4-20 mA Output?” Click on either No or Yes from the drop-down menu. A clamped reading never
exceeds the programmed 4-20 mA output range, while a reading that is not clamped can display measurements outside
the programmed range. (Click Previous Item to return to the previous parameter or on Exit Page to close the window
without changing the percentage.) You are then returned to the 4-20 mA Output window.

3.7.2 4 and 20 mA Cal

To calibrate the 4 and 20 mA output signals, click on the 4 mA Cal and 20 mA Cal commands respectively. In either
case, a window similar to Figure 28 below opens.

Figure 28: 4 mA Signal Calibration Window

Clicking on the UP command increases the signal incrementally, while clicking on the DOWN command decreases it
incrementally . Clicking on Numeric Calibration opens a window similar to the one shown in Figure 29 on page 30.

XMTC User’s Manual 29

Chapter 3. Operation and Programming

3.7.2 4 and 20 mA Cal (cont.)

Figure 29: Numeric Calibration Window

Enter the desired number in the text box and click on Next Item/En ter. (Click on Previous Item or Exit Page to clos e the
window without changing the signal.) You are then returned to the previous window. After you have calibrated the
desired input signal, click on STORE to save the entry, and on Next Item/Enter to confirm it. If the signal is not
satisfactory , click on ABORT. (Click Previous Item or Exit Page to close the window without changing the signal.) You
are then returned to the 4-20 mA Output window (see Figure 25 on page 28).

3.7.3 4-20 mA % Test

The window for 4-20 mA % Test is similar to Figure 30 below.

Figure 30: 4-20 mA% Test Window

Enter the desired percentage, and click on Next Item/Enter to confirm the entry . A secon d text box opens, enablin g you
to test at another percentage if desired. Repeat the procedure until you have entered all desired test values. Then click
Exit Page to close the window.

30 XMTC User’s Manual

Chapter 3. Operation and Programming

3.7.4 % Gas Test

The window for % Gas Test is similar to Figure 31 below.

Figure 31: % Gas Test Window

Enter the desired percentage, and click on Next Item/Enter to confirm the entry . A secon d text box opens, enablin g you
to test at another percentage if desired. Repeat the procedure until you have entered all desired values. Then click Exit
Page to close the window.

3.8 Error Handler

The Error Handler command allows you to enable or disable error handling for specific error conditions for the
XMTC. When you click on the Error Handler command from the Edit Functions menu (Figure 10 on page 20), a
window similar to Figure 32 below opens. Clicking on any option opens the window for that option.

Figure 32: Error Handler Window

XMTC User’s Manual 31

Chapter 3. Operation and Programming

3.8.1 Total Drift Error

The Total Drift Error option lets you enable or disable error handling for Total Drift Error. The window is similar to
Figure 33 below.

Figure 33: Total Drift Error Window

If you click on mA Enable, a window similar to Figure 34 below opens.

Figure 34: Error mA Output Window

Enter the desired error mA output in the text box, and click on Next Item/Enter to confirm the entry. You are then asked
for confirmation, as shown in Figure 35 on page 33.

32 XMTC User’s Manual

Chapter 3. Operation and Programming

3.8.1 Total Drift Error (cont.)

Figure 35: IDM Enable/Disable Window

Click on IDM Enable to enable drift error. (Click Previous Item or Exit Page to close the window without changing the
output.) However , if you click on mA Disable, you are also asked for confirmation. Click on IDM Disable to disable the
drift error. You are then returned to the Error Handler window.

3.8.2 Drift/Cal Error

The DriftCal Err or option lets you enable o r disable error handling for DriftCal, generated when an error occurs during
calibration. The window is similar to Figure 36 below.

Figure 36: DriftCal Error Window

If you click on mA Enable, the window displays a text box similar to that in Figure 34 on page 32. Enter the desired
error mA output in the text box, and click on Next Item/Enter to confirm the entry. You are then asked for confirmation,
as shown in a window similar to Figure 35. Click on IDM Enable to enable drift error. (Click Previous Item or Exit
Page to close the window without changing the output.) However, if you click on mA Disable, you are also asked for
confirmation. Click on IDM Disable to disable the drift error. You are then returned to the Error Handler window.

XMTC User’s Manual 33

Chapter 3. Operation and Programming

3.8.3 Gas mV Under/Over Range

The Gas mV Under Range and Gas mV Over Range options let you enable or disable error handling for the main gas
signal. The window is similar to Figure 37 below.

Figure 37: Gas mV Under Range Window

If you click on mA Enable, the window displays a text box. Enter the desired error mA output in the text box, and click
on Next Item/Enter to confirm the entry . You are then asked for confirmation. Click on IDM Enable to enable the under
or over-range error. (Click Previous Item or Exit Page to close the window without changing the output.) However, if
you click on mA Disable, you must confirm the choice in a second window. Click on IDM Disable to disable the under
or over-range error. You are then returned to the Error Handler window.

3.8.4 Gas % Under/Over Range

The Gas % Under Range and Gas % Over Range options let you enable or disable error handling for the main gas
percentage. The window is similar to Figure 38 below.

Figure 38: Gas % Under Range Window

If you click on mA Enable, the window displays a text box. Enter the desired error mA output in the text box, and click
on Next Item/Enter to confirm the entry. Then click on IDM Enable to enable the under or over-range error. (Click
Previous Item or Exit Page to close the window without changing the output.) However, if you click on mA Disable,
you must confirm the choice in a second window. Click on IDM Disable to disable the under or over-range error. You
are then returned to the Error Handler window.

34 XMTC User’s Manual

Chapter 3. Operation and Programming

3.9 Factory Cal

The XMTC comes completely preprogrammed from the factory for your particular application. Should it become
necessary to reprogram the meter, you can use the Factory Cal option.

IMPORTANT: Do not use the Factory Cal option without referring to the Calibration Data Sheet enclosed with your

XMTC. Varying from the parameters on the sheet can result in problems with the XMTC and other
equipment.

From the Edit Functions menu (shown in Figure 10 on page 20), click on the Factory Cal option. A window similar to
Figure 39 below opens.

Figure 39: Factory Cal Window

The option permits you to edit the number of points and the value of each individual point.

3.9.1 Edit # of Points

To edit the number of available points, click on Edit # of Points. A window similar to Figure 40 below opens.

Figure 40: Edit # of Points Window

Click on Add once for each point you wish to add, or on Delete once for each point you wish to remove. Then click on
Next Item/Enter to confirm the entry. (Click Previous Item or Exit Page to close the window without changing the
number of points.) You are then returned to the Factory Cal window, which displays the new number of points.

XMTC User’s Manual 35

Chapter 3. Operation and Programming

3.9.2 Edit Point X

T o edit the value for any particular point, click on that point in the Fa ctory Cal window. A window similar to Figure 41
below opens.

Figure 41: Point Editing Window

Enter the gas percentage in the text box, and click on Next Item/Enter to confirm the entry. (Click Pr evious Item or Exit
Page to close the window without changing the value.) Then, enter the next value, as shown in Figure 42 below.

Figure 42: Additional Values for Point 1

Enter the x01 and x10 Gas mV values, and click on Next Item/Enter af ter each entry. After you have completed entering
values, you are returned to the Factory Cal window.

36 XMTC User’s Manual

Chapter 3. Operation and Programming

3.10 The Advanced Option

IMPORTANT: Access to this menu is password-protected. Your assigned default password = 2719.

The final option on the Edit Functions menu is Advanced, an option that allows you to choose between Fast Response
and Language response. In addition, you can add or change the meter identification number.

Note: For other available commands in the Advanced Option, refer to Appendix D.

From the Edit Functions menu (Figure 10 on page 20), click on Advanced to open a window similar to Figure 43
below. Then, enter your password.

Figure 43: Password Window

After you have entered the password, an Advanced window similar to Figure 44 below opens.

Figure 44: Advanced Window

Fast Response is software-enhanced response for faster performance under certain conditions, while Language
response enables you to upload data to or download data from a PC. Meter ID enables you to enter or change a meter
network identification number. Click on the desired comman d. (Click Previous Item or Exit Page to close the window
without entering any commands.)

XMTC User’s Manual 37

Chapter 3. Operation and Programming

3.10.1 Fast Response

If you click on Fast Response, confirm the choice to open a window similar to Figure 45 below.

Figure 45: Fast Response Confirmation Window

Click Yes to enable Fast Response. In the series of three text boxes that follow, enter values for the Fast Tau up, Fast
Tau down, and Fast Threshold % FS parameters. Then, click on Next Item/Enter to confirm the entry and open the next

window.

IMPORTANT: Do not change the default values for these parameters without consulting the factory.

3.10.2 Language

If you click on Language, a window similar to Figure 46 below opens.

Figure 46: Language Window

38 XMTC User’s Manual

Chapter 3. Operation and Programming

3.10.2 Language (cont.)

If you click on Upload to PC, you are prompted to create a file, as shown in Figure 47 below.

Figure 47: Creating a Data File

If you click on Download from PC, you are asked for a file name, as shown in Figure 48 below.

Figure 48: Downloading a Data File

However, if you click on Reset to Defaults, the status is displayed in the Language window. Click on Next Item/Enter to
confirm the entry. (Click Previous Item or Exit Page to close the window without changing the status.)

XMTC User’s Manual 39

Chapter 3. Operation and Programming

3.10.3 Meter ID

The Meter ID window is similar to Figure 49 below.

Figure 49: Meter ID Window

Either leave the existing number without change, or enter a new meter ID number. In either case, click Next Item/Enter
to confirm the entry . (Click Previous Item or Exit Page to close the window without changing the number.) If you have
changed an existing ID number, a window similar to Figure 50 below opens.

Figure 50: Revised Meter ID Window

IMPORTANT: After you have entered a new ID number, you cannot reverse the change. You must exit the page, close the

connection, and reconnect the meter using the new number.

Click on Next Item/Enter or Exit Page to return to the Advanced window.

40 XMTC User’s Manual

IDM

Data

Global

Help

...More OpƟons...

Connect to a...

Edit FuncƟons

Upload/Download

Real-Time

System

NOTE: Click [Exit Page] or [Previous Item] at any Ɵme to abort the current operaƟon.

NoYes

[Next Item]

4-20mA Range

[Next Item]

Clamp 4-20mA Out?

Field Cal

4-20mA Output

[Next Item]

4-20mA % Test

[Next Item]

% Gas Test

[Exit Page]

4mA Cal 20mA Cal

4/20mA UP 4/20mA DOWN

Numeric CalibraƟon

4/20mA STORE 4/20mA ABORT

[click to increment value]

[Next Item]

[Next Item] [Next Item]

Zero Field Cal

Span Field Cal

[Next Item]

Perform Cal

Yes

Abort Field Cal

DriŌ OK!

ConĮgure Cal

Clear CaiibraƟon Hold Last Value

Hold Last Value

[Next Item]

NoYes

Field Cal Type

Field Cal Percent

Before Delay Time AŌer Delay Time

Max Total driŌ

Max DriŌ/Cal

[Next Item]

Zero Field Cal

Span Field Cal

[Next Item]

1 Point (Oīset)

2 Point (Z/S)

[Next Item]

Zero Field Cal

Span Field Cal

[Next Item]

Menu Item

Command Menu OpƟon

Data Entry Window

[Previous Item]

Return to Previous Window

[Next Item/Enter]

ConĮrm/Accept Current Entry

[Exit Page]

Return to Command Menu

KEY/LEGEND

Chapter 3. Operation and Programming

Figure 51: Field Cal and 4-20mA Output Menu Map

XMTC User’s Manual 41

IDM

Data

Global

Help

...More OpƟons...

Connect to a...

Edit FuncƟons

Upload/Download

Real-Time

System

Error Handler

Factory Cal

Edit Point X

Edit # of Points

Delete

Add

% Gas

[Next Item]

[Next Item]

x01 Gas mV

[Next Item]

x10 Gas mV

[Next Item]

Advanced

Language

Fast Response

Password

Meter ID

Number

[Next Item]

NoYes

Fast Tau Up

[Next Item]

Fast Tau Down

[Next Item]

Fast Threshold %FS

[Next Item]

Download from PC

Upload to PC

Reset to Defaults

Filename

[Next Item]

Gas mV under range

DriŌ/Cal Err

Gas mV over range

Total DriŌ Error

Gas % under range

Gas % over range

mA Enable mA Disable

Set Error mA Output

[Next Item]

IDM Enable IDM Disable

NOTE: Click [Exit Page] or [Previous Item] at any Ɵme to abort the current operaƟon.

Menu Item

Command Menu OpƟon

Data Entry Window

[Previous Item]

Return to Previous Window

[Next Item/Enter]

ConĮrm/Accept Current Entry

[Exit Page]

Return to Command Menu

KEY/LEGEND

Chapter 3. Operation and Programming

Figure 52: Error Handler, Factory Cal and Advanced Menu Map

XMTC User’s Manual 42

Chapter 4. Calibration

Chapter 4. Calibration

4.1 Introduction

This chapter provides information on calibrating the XMTC in the field using zero, span, and reference gases. The
following topics are discussed:

• General considerations for calibration at the factory and in the field

• What you will need before you begin calibrating

• Getting the XMTC ready and locating the adjustment potentiometers

• Calibrating the 2-Port (sealed reference gas) XMTC with zero and span gases

• Calibrating the 4-Port (flowing reference gas) XMTC with zero, span, and reference gases

4.2 Gas Ranges and Types

The XMTC was calibrated at the factory for the range and gas mixture specified at the time of purchase. The following
standard ranges and gases are provided:

Ranges: 0-2% Gases: H

0-5% He in Air
0-10% He in N

0-25% CH4 in CO2 (minimum range 0-10% CH4)
0-50% CO
0-100% CO
50-100%

80-100%
90-100%
95-100%
98-100%

Note: Calibrations can be performed for special ranges and gases upon request.

The XMTC requires recalibration every 2 to 6 months, depending on the application. The exact calibration interval will
depend on such factors as: components of the binary gas mixture, desired accuracy, range, and cleanliness of the
sample gas. You can recalibrate the XMTC for the same range and binary gas mixture as the previous calibration using
just the zero and span adjustments.

in N

2

2

2

in Air (minimum range 0-20% CO2)

2

in N2 (minimum range 0-20% CO2)

2

XMTC User’s Manual 43

Chapter 4. Calibration

4.3 Required Equipment and Materials

WARNING! The calibration procedure described in this section requires the use of specialized

apparatus and should be performed only by properly trained personnel.

To calibrate the XMTC, you will need the following equipment and materials:

• XMTC Calibration Sheet

• +24 VDC, 1.2 A power supply (system power, if unit is installed in a system)

• Zero gas

• Span gas

• Reference gas (for the 4-Port version - the reference gas is usually the same as the span gas.)

• Sample system or individual components (e.g. flow meter, needle valve, pressure regulator) for connecting

zero and span gases and controlling pressure and flow rates

Note: The accuracy of the calibration will only be as accurate as the composition accuracy of the zero and span

gases.

WARNING! Do not use explosive gas mixtures to calibrate the XMTC.

44 XMTC User’s Manual

Chapter 4. Calibration

Set Screw

Cover

4.4 Preparing the Transmitter for Calibration

Complete the following steps before connecting and adjusting the zero, span, and reference gases:

1. Allow 30 minutes after power is turned on for the XMTC to reach temperature stability.

2. Loosen the set screw that locks the XMTC cover in place, and unscrew the cover (see Figure 53 below).

Figure 53: Transmitter Cover and Set Screw

XMTC User’s Manual 45

Chapter 4. Calibration

Cal Button (S3)

Zero and Span Adjustment (S1)

4.4 Preparing the Transmitter for Calibration (cont.)

3. The XMTC printed circuit board (PCB) is located directly below the cover. Locate the switches S1 (zero and
span adjustment) and S3 (calibration button) using Figure 54 below as a guide.

Figure 54: Calibration Switch Locations

4.5 2-Port (Sealed Reference Gas) Calibration

1. Connect the XMTC Sample Inlet to the zero gas via the Zero Gas Inlet on the sample system or other gas
control system.

2. Establish a flow rate of 0.5 SCFH (250 cc/min) of zero gas at 0.0 psig to the XMTC.

3. Allow 2-5 minutes for the reading to settle. Move S1 to the zero position (marked on the PCB). Press S3 (the

calibration button) for about 20 seconds.

4. Connect the XMTC Sample Inlet to the span gas via the Span Gas Inlet on the sample system or other gas
control system.

5. Establish a flow rate of 0.5 SCFH (250 cc/min) of span gas at 0.0 psig to the XMTC.

6. Allow 2-5 minutes for the reading to settle. Move S1 to the span position (marked on the PCB). Press S3 (the

calibration button) for about 20 seconds.

46 XMTC User’s Manual

Chapter 4. Calibration

4.6 4-Port (Flowing Reference Gas) Calibration

1. Connect the XMTC Reference Inlet to the reference (span) gas via the Reference Gas Inlet on the sample

system or other gas control system.

2. Establish a flow rate of 0.5 SCFH (250 cc/min) of reference (span) gas at 0.0 psig to the XMTC Reference

Inlet.

Note: You can use a calibration gas flow rate as low as 5 cc/min to conserve gas.

3. Connect the XMTC Sample Inlet to the zero gas via the Zero Gas Inlet on the sample system or other gas

control system.

4. Establish a flow rate of 0.5 SCFH (250 cc/min) of zero gas at 0.0 psig to the XMTC Sample Inlet.

5. Allow 2-5 minutes for the reading to settle. Move S1 to the zero position (marked on the PCB). Press S3 (the

calibration button) for about 20 seconds.

6. Connect the XMTC Sample Inlet to the span gas via the Span Gas Inlet on the sample system or other gas

control system.

7. Establish a flow rate of 0.5 SCFH (250 cc/min) of span gas at 0.0 psig to the XMTC Sample Inlet.

8. Allow 2-5 minutes for the reading to settle. Move S1 to the span position (marked on the PCB). Press S3 (the

calibration button) for about 20 seconds.

XMTC User’s Manual 47

Chapter 4. Calibration

[no content intended for this page]

48 XMTC User’s Manual

Chapter 5. Specifications

5.1 Performance

Accuracy ±2% of span
Linearity ±1% of span
Repeatability ±0.5% of span
Stability Zero: ±0.5% of span per week

Span: ±0.5% of span per week

Response Time 20 seconds for 90% of step change

Chapter 5. Specifications

Measurement Ranges
(typical)

0-2%
0-5%
0-10%
0-25%
0-50%
0-100%
50-100%
80-100%
90-100%
95-100%
98-100%

Measurement Gases
(typical)

H

in N

2

air or CO

2,

2

He in N2 or Air

in N2 or Air (minimum range 0-20% CO2)

CO

2

in Air (minimum range 0-10% SO2)

SO

2

Ar in N

or air (minimum range 0-20% argon)

2

Ambient Temperature Effect ±0.05% of span per °C

Required Sample Gas

0.1 to 4.0 SCFH (5 to 2000 cc/min), 0.5 SCFH (250 cc/min) nominal

Flow Rate

Required Reference Gas

0.01 to 4.0 SCFH (5 to 2,000 cc/min), 0.5 SCFH (250 cc/min) nominal

Flow Rate

XMTC User’s Manual 49

Chapter 5. Specifications

5.2 Functional

Analog Output 4-20 mA isolated, 800 ohm max, field-programmable
Power 24 VDC ±2 VDC, 1.2 A maximum
Cable 10 ft (3 m), 4-wire; lengths up to 4000 ft. (1200 m) available

Operating Temperature

Standard: +55
Optional: +70°C (+158

o

C (+131oF)

o

F)

Ambient Temperature Range Standard cell operating temperature (55°): -20° to +45°C (-4° to +104°F)

Optional cell operating temperature (70°): +5° to +60°C (+41° to +140°F)

5.3 Physical

Sensor Wetted Materials Standard: 316 SS, glass, and Viton™ o-rings

Optional: Hastelloy C276, Titanium and Chemraz™ o-rings

Dimensions Weatherproof unit: 9.54” (H) x 5.70” (D) (242 x 145 mm)

Explosion-proof unit: 10.48” (H) x 5.70” (D) (266 x 145 mm)

Weight 9.5 lb (4.3 kg)
Connections Electrical conduit: 3/4” NPTF

Sample inlet/outlet, optional reference inlet/outlet: 1/4” NPTF

Environmental Weatherproof: Class I Div. 1 Groups A, B, C & D

Class II, III Div. 1 Groups E, F & G
Tamb 65°C T5 Type 4X

Flameproof: ITS12ATEX17703X

IECEx ITS 12.0058X
II 2 G Ex d IIC T6 Gb
IP66 -20°C < Tamb < +65°C
All conduit entries 3/4” NPT

CE: EMC 2004/108/EC

PED 97/23/EC

Note: For CE compliance, the power and I/O cables must be shielded. All cables

must be terminated within the cable gland at the XMTC.

Note: See the Certification Drawings in Appendix C, Installation and Wiring

Diagrams, for additional details.

50 XMTC User’s Manual

5.4 Accessories

The following accessories are available for use with the XMTC:

• PS5R-C24 - 24 VDC power supply

• X4 (*) - 4-wire cable (X specifies length), lengths up to 4000 ft (1200 m) are available

• TMO2D - display/control module

• MIS-1 and MMS-3 - graphical moisture, temperature, oxygen and thermal conductivity analyzers

• XDP - explosion-proof display package

• 704-668-12 - RS232 cable, 12 ft (4 m) length with DB-9 female connector

• IDM - manual and software with floppy disk (part number 910-185)

• PanaView - interface software manual and CD (part number 910-211)

Chapter 5. Specifications

XMTC User’s Manual 51

Chapter 5. Specifications

[no content intended for this page]

52 XMTC User’s Manual

Appendix A. Supplemental Information

A.1 Ordering Information

ABCDE

XMTC – –

B - Measuring Cell Package*

1. Weatherproof enclosure, sealed reference (2-port), CPVC cell

2. Explosion-proof enclosure, sealed reference (2-port), CPVC cell

3. Weatherproof enclosure, flowing reference (4-port) CPVC cell

4. Explosion-proof enclosure, flowing reference (4-port) CPVC cell

5. Weatherproof enclosure, sealed reference (2-port) FEP-coated aluminum cell*

6. Explosion-proof enclosure, sealed reference (2-port) FEP-coated aluminum cell*

Appendix A. Supplemental Information

W. Without enclosure, sealed reference (2-port), FEP-coated aluminum cell
X. Without enclosure, sealed reference (2-port), CPVC cell
Y. Without enclosure, flowing reference (4-port), CPVC cell

*Standard measuring cell package is FEP coated aluminum cell — see options 5 and 6 above.

C - CE Compliance

2.Standard
C. CE Compliant

D - Certification Label for Explosion-Proof Options

1. T6 rating label, for ambient temperatures up to 55°C

2. T5 rating label, for ambient temperatures up to 65°C

E - Wetted Material

1. 316 Stainless Steel/Viton O rings

2. Hastelloy C276/Chemraz O rings

XMTC User’s Manual 53

Appendix A. Supplemental Information

A.2 Calibration Specification Ordering Information

ABC

XMTC-CAL –

B - Cell Range

2. 0 to 2%

3. 0 to 5%

4. 0 to 10%

6. 0 to 25%

7. 0 to 50%

8. 0 to 100%

A. 90 to 100%
B. 80 to 100%
C. 50 to 100%
D. 98 to 100%
E. 95 to 100%
S. Special

C - Standard Gases

1. H

in N

2

2

2. CO2 in N2 (minimum range 0 to 20% CO2)

3. CO

4. He in N

in Air (minimum range 0 to 20% CO2)

2

2

5. He in Air

6. Calibration for H

7. CH

in CO2 (minimum range 0 to 10% CH4)

4

cooled generators H2/CO2/Air

2

S. Special

Note: Binary gas composition must total 100%.

54 XMTC User’s Manual

Appendix A. Supplemental Information

A.3 XMTC PCB Subassemblies

703-1276-02 XMTC transmitter analog PCB assembly
707-320 XMTC instrument program
703-1316-03 XMTC transmitter digital PCB assembly compatible with IDM communications software
910-185 Instrument Data Manager software and manual (supplied on floppy disk)
CREDIT-XMTC Trade-in credit for uncontaminated XMTC. Partial credit to be determined after receipt and upon

inspection at the factory.

XMTC User’s Manual 55

Appendix A. Supplemental Information

XMTC Calibration Sheet

XMTC S/N: 2630
XMTC Part Number: XMTC-62-11
Calibration Part Number: XMTC-CAL-311
Calibration Gases: H2/N2
Calibration Ranges: 0 to 5%
Work Order Number: 508230006418
Calibration Date: April 24, 2009
Technician: K. Brin

Unit Calibrated Using x10 Gain Scale

XMTC Calibration Data
Hydrogen in Nitrogen

PT %H2 x10 (mV) Output (mA)

1 0.00 -56.02 4.00
2 5.00 574.00 20.00

Output:

4 to 20 mA 0 to 5% H2 in N2

Clamp Output:

No

Field Calibration.

Zero:

100% N2

Span:

5% H2 in N2

A.4 Sample Calibration Sheet

A typical calibration sheet example is shown in Figure 55 below.

56 XMTC User’s Manual

Figure 55: A Sample Calibration Sheet

Appendix A. Supplemental Information

A.5 Relative Thermal Conductivity of Common Gases

Table 4: Thermal Conductivity of Common Gases

Gas Temperature = 0

Air, N2/O
Hydrogen, H
Helium, He 5.970 5.530

Nitrogen, N
Oxygen, O
Neon, Ne 1.900 1.840

Argon, Ar 0.677 0.665
Chlorine, Cl

Carbon Monoxide, CO 0.962 0.958
Carbon Dioxide, CO

Nitric Oxide, NO 0.980 0.978
Sulfur Dioxide, SO

Hydrogen Sulfide, H
Carbon Disulfide, CS
Ammonia, NH
Water Vapor, H
Methane, CH
Ethane, C
Propane, C
n-Butane, C
Isobutane, C
n-Pentane, C
Isopentane, C
n-Hexane, C
n-Heptane, C
Cyclohexane, C
Ethylene, C
Propylene, C
Acetylene, C
1,3 Butadiene, C
Nitrous Oxide, N
Ethylene Oxide, C
Ethyl Alcohol, C

Isopropyl Alcohol*, C3H7OH
Acetone, C
Methyl Chloride, CH
Ethyl Chloride, C
Vinyl Chloride, C
Freon-11, CCl
Freon-12, CCl
Freon-22, CHClF
Freon-113, C
Hydrogen Chloride, HCl 0.520 0.517

Hydrogen Fluoride, HF 0.654 0.959

2

2

2

2

2

2

2

S 0.538 0.562

2

2

3

O 0.755 0.771

2

4

2H6

3H8

4H10

4H10

5H12

5H12

6H14

7H16

6H12

2H4

3H6

2H2

4H6

O 0.633 0.762

2

O 0.469 0.620

2H4

OH 0.590 0.685

2H5

O 0.406 0.557

3H6

Cl 0.377 0.530

3

Cl 0.391 0.540

2H5

Cl 0.443 0.551

2H3

F 0.286 0.368

3

2F2

2

2Cl3F3

*Consult GE

o

C (32 oF) Temperature = 100oC (212oF)

1.000 1.000

6.968 6.803

1.000 0.989

1.018 1.028

0.323 0.340

0.603 0.704

0.350 0.381

0.285 0.300

0.897 1.040

1.250 1.450

0.750 0.970

0.615 0.832

0.552 0.744

0.569 0.776

0.535 0.702

0.515 0.702

0.508 0.662

0.399 0.582

0.375 0.576

0.720 0.980

0.626 0.879

0.770 0.900

0.441 0.642

0.492 0.644

0.344 0.442

0.388 0.474

0.277 0.369

XMTC User’s Manual 57

Appendix A. Supplemental Information

[no content intended for this page]

58 XMTC User’s Manual

Appendix B. Typical Applications

INPUT

OUTLET

SAMPLE

OUTPUT

INLET

SPAN GAS

INLET

ZERO GAS

INLET

SAMPLE

N2

N1

N3

N4

Appendix B. Typical Applications

B.1 H2 in N2 in Heat Treat Furnace Atmospheres

The XMTC can be used to measure the concentration of hydrogen (H2) in nitrogen (N2) in a heat treat furnace
atmosphere.

B.1.1 Problem

Mixtures of H2 and N2 are used as controlled atmospheres in the heat treating of metals. These mixtures are
well-defined and need to be maintained in order to assure product quality and consistency. Dissociated ammonia is one

such atmosphere. Here, ammonia is broken down into free N

B.1.2 Equipment

A typical instrumentation package includes a 2-port (Sealed Reference Gas - air) XMTC transmitter with a 4-20 mA
range of 0-25% H

often specified.

mounted in a sample system similar to the one shown in Figure 56 below. A display package is

2

and H2 in a 25 to 75% mixture.

2

Figure 56: Sample System

XMTC User’s Manual 59

Appendix B. Typical Applications

XMTC CALIBRATION SHEET

THERMAL CONDUCTIVITY TRANSMITTER

Serial Number TC-102
Part Number XMTC-22-2
Range, % 0 to 25% H

2

Output 4 to 20 mA
PC Board 703-1095

Work Order: PCI 90403
Calibration Date: September 18, 2000

Point %H

2

* H2, mA
1 0.00 4.00
2 25.00 20.00

*Calibration is with Hydrogen (H

2

) in Nitrogen (N2)

B.1.2 Equipment (cont.)

The sample system consists of needle valves for selection and isolation of sample, zero, and span gases, a needle valve
for flow control, a filter/coalescer, a 2-port XMTC transmitter, a pressure gauge, a flowmeter, and a sample pump. All
components are mounted on a painted steel plate.

Note: A TMO2D or XDP display package is typically used. A GE moisture analyzer can be used when the H

2

measurement is to be made in conjunction with a moisture measurement.

B.1.3 Basic Operating Procedure

The H2 content is continuously monitored at the inlet, hot zone, and/or effluent of the furnace. A sample gas flow rate
of 0.5 SCFH (250 cc/min) is established. The sample system should be located in an area cooler than 50

the tubing leading to the sample system should be at least 5 ft (1.5 m) long to insure proper cooling of the sample gas.

For this application the required calibration gases are:

• Zero gas - N

• Span gas - 10.0 or 25.0% H

(99.95 % minimum purity)

2

in N2, or H2 (99.95 % minimum purity)

2

A typical XMTC Calibration Data Sheet is shown in Figure 57 below.

o

C (122oF), and

Figure 57: A Typical XMTC Calibration Data Sheet

60 XMTC User’s Manual

Appendix B. Typical Applications

B.1.4 Permanent Installation

Continuous monitoring of the furnace atmosphere H2 content using the XMTC assures a high degree of quality control
in the manufacturing process.

B.1.5 Specifications

Typical Ranges:

0 to 10% H
0 to 25% H2 in N
0 to 100% H2 in N

Operating Conditions:

Pressure: Ambient
Temperature: +540 to +1370

in N

2

2
2

2

o

C (+1000 to +2500oF)

B.1.6 Detailed Operating Procedure

The following procedure details the start-up, operation, and calibration of the 2-port (Sealed Reference Gas) XMTC
sample system for heat treat furnace applications shown in Figure 56 on page 59.

Needle valves N1 through N4 on the sample system drawing have the following functions:

• N1 – selects/isolates the process sample gas

• N2 – selects/isolates the calibration zero gas

• N3 – selects/isolates the calibration span gas

• N4 – controls the flow of the selected gas

XMTC User’s Manual 61

Appendix B. Typical Applications

B.1.6a Start-up

1. Mount the sample system in an enclosed area heated to a temperature above 0oC.

2. Make sure that all needle valves are fully closed.

3. Run 1/4” tubing from the process to N1 (Sample Inlet).

Note: If the process is at a high pressure, a pressure regulator should be placed before this valve.

CAUTION! The XMTC is calibrated and intended for use at atmospheric pressure. Higher

pressures will lead to inaccurate readings, may result in damage to the instrument, and/or may
pose a safety problem.

4. Run 1/4” tubin g from the pressure regul ator on the cylinder containing the zero calibration gas to N2 ( Zer o Gas

Inlet).

5. Run 1/4” tubing from the pressure regulator on the cylinder containing the span calibration gas to N3 (Span

Gas Inlet).

Note: No pressure restrictions should be placed on the pump outlet. Any tubing on the outlet should be at least 1/4”

in diameter, and preferably 1/2”.

6. Leak test all sample system fittings, as well as those leading to the sample system.

7. Bring 24 VDC to the XMTC. Refer to Chapter 2, Installation, and allow 1 hour before proceeding.

8. Bring 120 VAC to the sample pump.

9. Open N4 one turn.

10. Fully open N1.

11. Adjust N4 until the flowmeter reads mid-scale. The pressure gauge should read 0 psig.

After the system has come to equilibrium, the sample system should be checked periodically to ensure that there is gas
flow through the flowmeter.

62 XMTC User’s Manual

Appendix B. Typical Applications

B.1.6b Calibration

Refer to Chapter 4, Calibration, for the complete XMTC calibration procedure. The procedures below are only a
supplement to that procedure. These procedures show the valve configurations necessary to deliver the calibration
gases to the XMTC.

Zero Gas Calibration:

1. Fully clos e N1 .

2. Fully open N2.

3. Adjust N4 until the flowmeter reads mid-scale. The pressure gauge should read 0 psig.

Allow enough time for the tubing to be cleared of the sample gas before making any adjustments to the transmitter.

Span Gas Calibration:

1. Fully close N2 (or N1).

2. Fully open N3.

3. Adjust N4 until the flowmeter reads mid-scale. The pressure gauge should read 0 psig.

Allow enough time for the tubing to be cleared of the zero (or sample) gas before making any adjustments to the
transmitter.

Returning to Standard Operation:

1. Fully close N3 (or N2).

2. Fully open N1.

3. Adjust N4 until the flow meter reads mid-scale. The pressure gauge should read 0 psig.

After the system has come to equilibrium, the sample system should be checked periodically to insure that there is flow
through the flow meter.

XMTC User’s Manual 63

Appendix B. Typical Applications

REFERENCE

SAMPLE
OUTLET

INLET

SAMPLE

REFERENCE

GAS INLET

GAS OUTLET

ZERO GAS

INLET

N1

N2

N3

N4

9.00

(229.5)

(MIN)

TRANSMITTER

B.2 H2 Purity in H2-Cooled Electricity Generator

The XMTC can be used to measure the purity of hydrogen (H2) in hydrogen-cooled electricity generators used in the
power industry.

B.2.1 Problem

H2 is used as a cooling medium in electricity generators because of its high thermal conductivity. If air leaks into the

, the mixture can become explosive.

H

2

B.2.2 Equipment

A typical instrumentation package includes a 4-port (Flowing Reference Gas - hydrogen), explosion-proo f XMTC
transmitter with a 4-20 mA range of 80 to 100% H

below. An XDP display package is often specified.

mounted in a sample system similar to the one shown in Figure 58

2

Figure 58: Sample System (732-028)

64 XMTC User’s Manual

Appendix B. Typical Applications

XM TC CALIB R ATION SHEET

T HERMAL CONDUCT IVITY TRANSM ITT ER

XMTC Transmi tter

Serial Number TC-135
Part Number XMTC-42-1
Range, % 80 to 100% H

2

in N

2

Output 4 to 20 mA
PC Board 703-1095
Work Order: PCI 94445
Calibration Date: September 1, 2000

Point %H

2

* H2, mA

1 80.00 4.00
2 90.00 11.62
3 100.00 20.00

*Calibration is with Hydrogen (H

2

) in Nitrogen (N2)

B.2.2 Equipment (cont.)

The sample system consists of inlet needle valves for sample, zero, span, and reference gases; a 4-port explosion-proof
XMTC; two pressure gauges; and two flowmeters. All components are mounted on a painted steel plate. A pump may
be needed to draw a sample through the sample system.

Note: A TMO2D or XDP display package is typically used. A GE moisture analyzer display package can be used

when the H

measurement is to be made in conjunction with a moisture measurement.

2

B.2.3 Basic Operating Procedure

The H2 purity is continuously monitored at the generator. A sample gas flow of 0.5 SCFH (250 cc/min) is established.
A hydrogen reference gas flow of 0.4 SCFH (200 cc/min) is sufficient for proper operation. The sample system should

o

be located in an area cooler than 50
(1.5 m) long to insure proper cooling of the sample gas.

For this application the required calibration gases are as follows:

C (122oF), and the tubing leading to the sample system should be at least 5 ft

• Zero gas - 80.0% H

• Span gas - H

2

in N

2

2

(minimum 99.95 % purity)

• Reference gas - same as span gas

A typical XMTC Calibration Data Sheet is shown in Figure 59 below.

Figure 59: Typical XMTC Calibration Data Sheet

XMTC User’s Manual 65

Appendix B. Typical Applications

B.2.4 How Previously Handled

The system (generator) was leak checked periodically. If a leak occurred between checks, an explosion could occur.
Moisture analyzers were also used for continuous analysis, since the presence of moisture in the H

of an air leak.

is indirect evidence

2

B.2.5 Permanent Installation

Continuous monitoring of the generator H2 purity using the XMTC provides increased safety. A low H2 reading alerts
plant personnel to a potential safety problem and allows them to locate the leak and correct the problem.

B.2.6 Specifications

Range:

80 to 100% H

Operating Conditions:

Pressure: 0.5 to 75 psig
Temperature: +30° to +50

in N

2

2

o

C (+86 to +122oF)

B.2.7 Detailed Operating Procedure

The following procedure details the start-up, operation, and calibration of the 4-port (Flowing Reference Gas) XMTC
sample system for the hydrogen purity applications shown in Figure 58 on page 64.

Needle valves N1 through N4 on the sample system drawing have the following functions:

• N1 – controls the flow of the process sample gas

• N2 – controls the flow of the zero calibration gas

• N3 – controls the flow of the span calibration gas

• N4 – controls the flow of the reference gas

66 XMTC User’s Manual

Appendix B. Typical Applications

B.2.7a Start-up

1. Mount the sample system in an enclosed area heated to a temperature above 0oC.

2. Make sure that all needle valves are fully closed.

3. Run 1/4” tubing from the process to N1 (Sample Inlet).

Note: If the process is at a high pressure, a pressure regulator should be placed before this valve.

CAUTION! The XMTC is calibrated and intended for use at atmospheric pressure. Higher

pressures will lead to inaccurate readings, may result in damage to the instrument, and/or may
pose a safety problem.

4. Run 1/4” tubin g from the pressure regul ator on the cylinder containing the zero calibration gas to N2 ( Zer o Gas

Inlet).

5. Run 1/4” tubing from the pressure regulator on the cylinder containing the span calibration gas/reference gas to

N4 (Reference Gas Inlet).

Note: No pressur e restrictions should be placed on the flowmeter outlets. Any tubing on the outlets should be at least

1/4” in diameter, and preferably 1/2”.

6. Leak test all sample system fittings, as well as those leading to the sample system.

7. Bring 24 VDC to the XMTC. Refer to Chapter 2, Installation, and allow 1 hour before proceeding.

8. Slowly open N1 until the sample outlet flowmeter reads mid-scale. The pressure gauge at the sample outlet

should read 0 psig.

9. Slowly open N4 until the reference gas outlet flowmeter reads mid-scale. The pressure gauge at the reference

gas outlet should read 0 psig.

After the system has come to equilibrium, the sample system should be checked periodically to insure that there is gas
flow through both flowmeters.

XMTC User’s Manual 67

Appendix B. Typical Applications

B.2.7b Calibration

Refer to Chapter 4, Calibration, for the complete XMTC calibration procedure. The procedures below are only a
supplement to that procedure. These procedures show the valve configurations necessary to bring the calibration gases
to the XMTC.

Zero Gas Calibration:

1. Fully clos e N1 and / or N3.

2. Slowly open N2 until the sample outlet flowmeter reads mid-scale. The pressure gauge at the sample outlet

should read 0 psig.

Note: If N3 was closed in this step and if the flow in the reference gas outlet flowmeter increased when N3 was

closed, adjust N4 to bring the flow to mid-scale.

Allow enough time for the tubing to be cleared of the sample gas or calibration span gas before making any
adjustments to the transmitter.

Span Gas Calibration:

1. Fully clos e N1 and / or N2.

2. Slowly open N3 until the sample outlet flowmeter reads mid-scale. The pressure gauge at the sample outlet

should read 0 psig.

Note: If the flow in the refer ence gas outlet flowmeter decr eased when N3 was opened, adjust N4 to bring the flow to

mid-scale.

Returning to Standard Operation:

1. Fully clos e N2 and / or N3.

Note: If N3 was closed in this step and if the flow in the reference gas outlet flowmeter increased when N3 was

closed, adjust N4 to bring the reference gas flow to mid-scale.

2. Slowly open N1 until the sample outlet flowmeter reads mid-scale. The pressure gauge at the sample outlet

should read 0 psig.

After the system has come to equilibrium, the sample system should be checked periodically to insure that there is flow
through both flow meters.

68 XMTC User’s Manual

Appendix C. Installation and Wiring Diagrams

Appendix C. Installation and Wiring Diagrams

This appendix includes the following XMTC drawings in 11” x 17” fold-out format:

• Figure 60, “Certification Drawing (ref. 752-168, Rev. E. SH1),” on page 71

• Figure 61, “Certification Drawing (ref, 752-168, Rev. E, SH2),” on page 72

• Figure 62, “Certification Drawing (ref. 752-168, Rev. E, SH4),” on page 73

• Figure 63, “Analog PCB Schematic (ref. 700-1276, Rev. F, SH1),” on page 74

• Figure 64, “Analog PCB Schematic (ref. 700-1276, Rev, F, SH2),” on page 75

• Figure 65, “Digital PCB Schematic (ref. 700-1316, Rev. H, SH1),” on page 76

• Figure 66, “Digital PCB Schematic (ref. 700-1316, Rev. H, SH2),” on page 77

• Figure 67, “EMI Filter PCB Schematic (ref. 700-1550, Rev. A),” on page 78

• Figure 68, “Analog PCB Assembly (ref. 703-1276, Rev. H),” on page 79

• Figure 69, “Digital PCB Assembly (ref. 703-1316, Rev. K, SH1),” on page 80

• Figure 70, “Digital PCB Assembly (ref. 703-1316, Rev. K, SH2),” on page 81

• Figure 71, “EMI Filter PCB Assembly (ref. 703-1550, Rev. A, SH1 & SH2),” on page 82

• Figure 72, “XMTC Interconnection Diagrams,” on page 83

XMTC User’s Manual 69

[no content intended for this page]

70 XMTC User’s Manual

C-C NOITCES

CC

6,5 DEVOMER DNA 4,3,2,1 STEEHS DETADPU ,OCE REP DETADPU

.cnI,gnisneSerutcurtsafnIEG

evirDkraPygolonhceT0011

ASU12810,AMacirelliB

ROTSERRA EMALF ,U2000.21 ENI xECEI & U31009XETA21 SIRENI

.11

ECNARAELC DNA EGAPEERC NI 52.0 ERIUQER SLANIMRET GNIRIW DLEIF

.8

YLLACINAHCEM ,KCIHT 020. ETALP GNITNUOM LEBAL .ON LAIRES DNA LEDOM

.DERUCES YLLACINAHCEM ,MUNIMULA KCIHT 020. :LAIRETAM LEBAL REZYLANA

ETISOPPO FO SLANIMRET DNA GNIRIW DLEIF TIUCRIC YLPPUS NEEWTEB

EHT DNA SLANIMRET GNIRIW DLEIF TIUCRIC YLPPUS DNA YTIRALOP

DEGAGNE YLLUF 8

MUMINIM SDAERHT

ø

2.041

OSI 3/569 2x421M
DAERHT CIRTEM

GNIR-O

81.1

0.03

.ERUSOLCNE

.9

.01

.DERUCES

PIT ENOC mm8 x 5M

WERCS TES DAEH TEKCOS

ø

25.5

.SELOH DELLIRD LLA

.mm2.0 FO SSENKCIHT MUMIXAM A HTIW 8307 LAR -TAOC REDWOP DERUTXET :HSINIF

DEWOLLA GNINIHCAM RO SELOH LANOITIDDA

ON

AID mm 021 x KHT mm 35.3 LAES FOORP REHTAEW ROF GNIR-O

DNUORA/REDNU DERIUQER LAIRETAM ESAC SSECXE mm3

.STTAW 52 DEECXE OT TON NOITAPASSID REWOP LANRETNI

.3

.2

.5

.6

.7

.4

861-257

CTMX,2OMX

ERIUQERGNIWARDSIHTOTSEGNAHC

.NOITAZIROHTUAYCNEGAROIRP

REENIGNENOITACIFITRECEHTTCATNOC

GNIWARDNOITACIFITREC

.DERIUQER TON STSET ERUSSERP ENITUOR .ERUSSERP NOITPMEXE CITATSORDYH STEEM

:SETON

) LA = REDNIAMER ,%5.0 = nM ,%53.0 = gM ,%9 = iS ( ERUSOLCNE MUNIMULA :LAIRETAM

,%35.0=uC ,%50.2=oM%5.61=rC ,%07.1=nM ,%54.0=iS ,%110.O=C ( ERUSOLCNE LEETS SSELNIATS

) eF = REDNIAMER ,%460.0=N ,%620.0=S ,%82.0=P ,%2.01=iN

.1

OCE REP DETADPU Aver861-257 MORF NEKAT

B

30/52/8

FCJ

9885

6&,5,4,3,2 STEEHS DETADPU

72050

6&,5,4,3 STEEHS DETADPU ,OCE REP DETADPU

C

40/12/1

FCJ

29150

30/92/8

GJ

30/4/9

FWP

40/72/1

GJ

40/72/1

FWP

40/1/21

NR

D

92450

6&,5,4,3 STEEHS DETADPU ,OCE REP DETADPU

JADFWP

40/2/21

40/2/21

E

21/1/21

21/1/21

21/1/21

SPJGK

SPJ

36480

.ONLEDOM

NR

SNOITPIRCSED

SNOISIVER

OCEVER NWDDKCDVPA

DACOTUA

D

Appendix C. Installation and Wiring Diagrams

Figure 60: Certification Drawing (ref. 752-168, Rev. E. SH1)

XMTC User’s Manual 71

Appendix C. Installation and Wiring Diagrams

D

20/31/60GJ

20/81/60FMP20/62/40ALR

861-257

ERIUQERGNIWARDSIHTOTSEGNAHC

.NOITAZIROHTUAYCNEGAROIRP

REENIGNENOITACIFITRECEHTTCATNOC

A-ANOITCES

Figure 61: Certification Drawing (ref, 752-168, Rev. E, SH2)

XMTC User’s Manual 72

Appendix C. Installation and Wiring Diagrams

ERIUQERGNIWARDSIHTOTSEGNAHC

.NOITAZIROHTUAYCNEGAROIRP

REENIGNENOITACIFITRECEHTTCATNOC

NOISREVCTMX

20-

60-

40-

80-

:etaD .gfM

gnisneS EG

tsaE enoZ eerF

dnalerI ,nonnahS

gnisneS EG

tsaE enoZ eerF

dnalerI ,nonnahS

06 revo stneibma nI

º

09 rof detar eriw dleif esu C

º

.nim C

66PI

56 bmaT

º

C

X4 epyT

96.57

52.

PYT

39.43

52.

PYT

78.7

PYT

99.81

PYT

50.3
SCLP 4

.SCLP 4

38.1 AID

39.1 AID

R

03.3

SCLP 4

00.76

PYT

gnisneS ,erutcurtsarfnI EG
.rD kraP ygolonhceT 0011

ASU 12810 AM ,acirell

iB

era srotserra emalf fi dioV :noituaC

negyxo rof devorppA .devomer

.tnecrep 52 ot pu snoitartnecnoc

slaes tiudnoc eriuqer snoitallatsni ASC

.sehcni 81 nihtiw

D&,C,B,A PG 1 VID I LC

G&,F,E PG ,1 VID III,II LC

X4 epyT 5T C 56 bmaT

º

®

devorppA

:etaD .gfM

gnisneS ,erutcurtsarfnI EG
.rD kraP ygolonhceT 0011

ASU 12810 AM ,acirelliB

06 revo stneibma nI

º

09 rof detar eriw dleif esu C

º

.nim C

66PI

56 bmaT

º

C

X4 epyT

devorppA

®

0811

sttaW 52 CDV 42

rezylanA saG CTMX

0811

sttaW 52 CDV 42

rezylanA saG CTMX

0811

sttaW 52 CDV 42

rezylanA saG CTMX

0811

sttaW 52 CDV 42

rezylanA saG CTMX

X30771XETA21STI

X8500.21 STI xECEI
bG 6T CII d xE G 2 II

02- 66PI

TPN "4/3 SEIRTNE TIUDNOC LLA

ºº

C56+ <bmaT< C

X30771XETA21STI

X8500.21 STI xECEI
bG 6T CII d xE G 2 II

02- 66PI

TPN "4/3 SEIRTNE TIUDNOC

LLA

ºº

C56+ <bmaT< C

RP NOISLO NOISREV FOO

E

LPLXEBA

RP NOISLO NOISREV FOO

E

LPLXEBA

D

861-257

tneserp si erehp

somta evisolpxe na nehw

nepo ton oD

tneserp si erehpsomta evisolpxe na nehw nepo ton o

D

LEBAL NOISREV FOORPREHTAEW

LEBAL NOISREV FOORPREHTAEW

NOISREV ASU

NOISREV ASU

NOISREV DNALERI

NOISREV DNALERI

Figure 62: Certification Drawing (ref. 752-168, Rev. E, SH4)

XMTC User’s Manual 73

Appendix C. Installation and Wiring Diagrams

TABLE 3

GROUPS

NUMBER

DESCRIPTION R6 R7

-02 TC 7680 2260

-03 OX 6340 3650

-04 OX + PRESS 6340 3650

-01 STANDARD

PRESSURE COMPENSATION OX + PRESS

NOTES:

1. RESISTORS VALUES ARE OHMS, 5%, 1/4W UNLESS SHOWN OTHERWISE

2. SMD RESISTORS VALUES ARE OHMS, 5%, 1/8W UNLESS SHOWN OTHERWISE.

3. CAPACITORS VALUES ARE MICROFARADS UNLESS SHOWN OTHERWISE.

4. [ ] DENOTES SMD MARKING CODES.

5. IC POWER, LAST USED, AND DECOUPLING CAPACITORS SHOWN ON PAGE 2.

Figure 63: Analog PCB Schematic (ref. 700-1276, Rev. F, SH1)

XMTC User’s Manual 74

CONNECT TO

CHASSIS GROUND

TABLE 2

REFDES

HIGHEST USED NOT USED

C35
CR5

CR2, CR4

J7 J5

E13

E7, E8, E10, E11

L1

MT1

P7 P3-P6
Q3

R31

R12-R15, R30

RA1
U15

U3, U4

VR4
W5

W2, W3, W4

Y1

TABLE 1

POWER CHART

REFDES TYPE

+5VA +5VD

+12V -12V

BRTN ARTN

U7 OP200G 13 4

U6 TL062AC 8 4

U2 LF442C 8 4

SPARES

Appendix C. Installation and Wiring Diagrams

Figure 64: Analog PCB Schematic (ref. 700-1276, Rev, F, SH2)

XMTC User’s Manual 75

Appendix C. Installation and Wiring Diagrams

Figure 65: Digital PCB Schematic (ref. 700-1316, Rev. H, SH1)

XMTC User’s Manual 76

SMD CONFIGURATIONS BASE DIAGRAM SPARE GATES

(TOP VIEW) (BOTTOM VIEW)

SELECT

ADJUST

CONVECTION COMPENSATION

NOTES:

1. RESISTOR VALUES ARE EXPRESSED IN OHMS, 1%, 1/8W, UNLESS OTHERWISE SPECIFIED.

2. CAPACITOR VALUES ARE EXPRESSED IN MICROFARADS, UNLESS OTHERWISE SPECIFIED.

3. INDICATES MARKING.

4. [ ] INDICATES SMD MARKING CODES.

5. I.C. POWER, LAST USED, AND DECOUPLING CAPACITORS SHOWN ON PAGE 2.

TABLE 3

GROUP CHART

NUMBER

DESCRIPTION

01

02

03

STANDARD

02

TC

TABLE 2

GROUP CHART

HIGHEST USED NOT USED

Y1

VR2

U15

TB2

S3

RV3

RT2

RT1

R28 R1 R5 R6 R8 R10

Q4

P8 P1 P2 P3 P5

M1

L1

JB J2 J3 J4 J6

F1

E7

DS2

CR3

C34 C5 C15 C29

BT1

VR1

TABLE 1

POWER CHART

REF DES TYPE

+5V -5V

DMISC

U9 U14 74HC00 14

7

U13 AD822A

8 = VE

4 = E

Appendix C. Installation and Wiring Diagrams

Figure 66: Digital PCB Schematic (ref. 700-1316, Rev. H, SH2)

XMTC User’s Manual 77

Appendix C. Installation and Wiring Diagrams

TABLE 1

HIGHEST USED NOT USED

REF DES CHART

TB3A

TB1A TB2A

TB1B

RV3

R1

L1

F1

C6

Figure 67: EMI Filter PCB Schematic (ref. 700-1550, Rev. A)

XMTC User’s Manual 78

ADD JUMPER FROM U3

PIN 2 TO U3 PIN 5

SEE DETAIL "B"

FOR 710-1276 REV A, B, C ONLY

DETAIL "A"

P7

78

1

SEE DETAIL "B"

COMPONENT SIDE VIEW

SEE NOTE 4

FOR U3 REWORK
SEE DETAIL "A"

DETAIL "B"

SOLDER SIDE VIEW

SEE NOTE 2

SEE NOTE 2

INSTALL C35 ATOP

FOR 710-1276 REV A, B, C ONLY

OR ASIDE R3

SOLDER SIDE VIEW

1

REF

REF ONLY

CHANGES TO THIS DRAWING MAY REQUIRE PRIOR AGENCY (FM/CSA)

AUTHORIZATION. REFER TO CERTIFICATION DRAWING 752-107

AND CONTACT THE CERTIFICATION ENGINEER.

GROUPS

NUMBER

DESCRIPTION

04 OX + PRESS

03 OX

02 TC

01 STANDARD

NOTES:

1. ASSEMBLE PER IPC-A-610 AND/OR PANAMETRICS STANDARD 957-002.

2. INSTALL C29 AND C30 ON SOLDER SIDE OF BOARD AS SHOWN.
C29 MAY EXTEND OVER THE EDGE OF THE PCB 0.14" MAX.

3. TRIM J6 AND J7 LEADS TO 0.04 INCHES MAX HEIGHT ABOVE THE PCB.

4. INSTALL VR3 AT CR2 LOCATION AND INSTALL VR4 AT CR4 LOCATION.

Appendix C. Installation and Wiring Diagrams

Figure 68: Analog PCB Assembly (ref. 703-1276, Rev. H)

XMTC User’s Manual 79

Appendix C. Installation and Wiring Diagrams

GROUPS

NO. DESCRIPTION

01 STANDARD

02 02

03 TC

INSTALL ON PINS 2 AND 3

78

P8

SEE NOTE 2

78

P7

INSTALL ON PINS 2 AND 3

78

P4

INSTALL ON PIN1 ONLY

68

TB1A

70

TB1B

71

TB2B

69

TB2A

SEE NOTE 5

1

ASSEMBLY TOP

NOTES:

1. ASSEMBLE PER IPC-A-610 AND/OR PANAMETRICS STANDARD 957-002.

2. R19 NOT INSTALLED (SPECIALS ONLY).

3. ALL UNINSTALLED COMPONENT HOLES TO BE SOLDER FREE.

4. DISCARD LOCKWASHER AND NUT ON S2 (DO NOT INSTALL).

5. INSTALL P6 WITH LONGER LEADS INTO PCB AS SHOWN FOR PROPER STACKUP WITH MATED ASSEMBLY.
SOLDER MUST BE FLUSH TO BOARD. DO NOT CUT, TRIM OR TIN EXCESS LEADS.

6. INSTALL CHASSIS GROUND WIRE ON THE BOTTOM SIDE OF THE PCB. APPLY LOCTITE 416 INSTANT
ADHESIVE AND LOCTITE 7452 ACCELERATOR OR EQUIVALENT TO TACK WIRE TO PCB.

XMTC User’s Manual 80

Figure 69: Digital PCB Assembly (ref. 703-1316, Rev. K, SH1)

BOTTOM SIDE ASSEMBLY

SEE NOTE 6

109

110

2.50

Appendix C. Installation and Wiring Diagrams

Figure 70: Digital PCB Assembly (ref. 703-1316, Rev. K, SH2)

XMTC User’s Manual 81

Appendix C. Installation and Wiring Diagrams

ASSEMBLY TOP BOTTOM SIDE ASSEMBLY

NOTES:

1. ASSEMBLE PER IPC-A-610 AND/OR PANAMETRICS STANDARD 957-002.

Figure 71: EMI Filter PCB Assembly (ref. 703-1550, Rev. A, SH1 & SH2)

XMTC User’s Manual 82

Appendix C. Installation and Wiring Diagrams

(see User's Manual for details)

1234123

TB2 TB1

XMTC

PS5R-C24

(or equal)

+24 RTN

TB1TB2

(or equal)

1232341

PS5R-C24

RTN+24

REC

21

+-

A

AUX

+24V

76543

RTN

-+

B

12

8

387654

REC

A

-+

B

+- 1RTN

21

+24V2

AUX

nd

G

ine

L

N

eut

1/2 AMP

250V

SLO-BLO

3AG

3214321

TB2 TB1

3231421

TB2 TB1

E

S

U

F

E

S

U

F

MIS-1/MMS-3 Connections MIS-2 Connections

(see User's Manual for details)

XDP Connections

(see User's Manual for details)

TMO2D Connections

(see User's Manual for details)

XMTC

XMTCXMTC

Figure 72: XMTC Interconnection Diagrams

XMTC User’s Manual 83

[no content intended for this page]

Appendix C. Installation and Wiring Diagrams

XMTC User’s Manual 84

Appendix D. The Enhanced Advanced Option

Appendix D. The Enhanced Advanced Option

D.1 Entering the Enhanced Advanced Option

For internal technical support, the XMTC transmitter software includes in its Edit Functions submenu (Advanced
Option command) several commands only accessible with factory authorization. Since improper programming could

result in serious performance inaccuracies, these commands should only be accessed under direct factory supervision
using the GE IDM™ software.

IMPORTANT: You must contact GE before changing the parameters in this menu.

To access the enhanced Advanced Option:

1. From the Edit Functions menu (see Figure 10 on page 20), click on Advanced.

2. When a window similar to Figure 73 below opens, enter your factory-level password. Contact GE for the

appropriate password.

Figure 73: Password Window

After you have entered the password, an Advanced window similar to Figure 74 below opens.

Figure 74: Advanced Window

XMTC User’s Manual 85

Appendix D. The Enhanced Advanced Option

D.1 Entering the Enhanced Advanced Option (cont.)

Along with Fast Response, Language, and Meter ID discussed in Chapter 3, the enhanced Advanced Menu offers four
additional commands:

• Heater - sets a specified operating temperature for the XMTC cell.

• Balance Bridge - compensates the XMTC cell for nonlinearity in the bridge (for factory use only).

• Factory Commands - allows users to upload or download modified settings or to reset the values to the

factory defaults.

• Temperature Comp. - allows entry of temperature calibration values (for factory use only).

Click on the desired option to open it, or click on Next Item/Enter to open the menu listed on the status line above the
options. (Click Previous Item or Exit Page to close the window without enteri ng an y commands.)

D.2 Heater

The parameters in the Heater command affect the operation of the Heater controls. The window for the Heater
command is similar to Figure 75 below.

Figure 75: Temperature Comp. Window

The first command, Setpoint Degrees C, asks you to enter the Heater Setpoint (the temperature at which the cell is
maintained). Enter the desired temperature (in degrees C) and press Next Item/Enter to confirm the entry. (For any
command, click Previous Item to return to the previous parameter, or Exit Page to close the window without changing
any values.)

86 XMTC User’s Manual

Appendix D. The Enhanced Advanced Option

D.2 Heater (cont.)

The next command, as shown in Figure 76 below, asks you to enter the Proportional Band (in degrees C). This
parameter should be set at 5° unless otherwise specified by GE.

Figure 76: Proportional Band in the Heater Window

Enter the desired value and click on Next Item/Enter to confirm the entry.

The final command asks for the Integral Time in seconds, as shown in Figure 77 below. Unless otherwise specified by
GE, the Integral Time should be set at 200.00.

Figure 77: Integral Time secs in the Heater Window

Enter the desired number of seconds, and click on Next Item/Enter to confirm the entry and return to the Advanced
window.

XMTC User’s Manual 87

Appendix D. The Enhanced Advanced Option

D.3 Balance Bridge

The window for the Balance Bridge command is similar to Figure 78 below.

Figure 78: Balance Bridge Window

Click on Next Item/Enter after the bridge has reached stability. You can monitor stability in the Real Time/Diagnostics
menu of IDM. The next window lists the selected thermal parameters, as shown in Figure 79 below.

Figure 79: Zero Correction Window

88 XMTC User’s Manual

Appendix D. The Enhanced Advanced Option

D.3 Balance Bridge (cont.)

Click on Next Item/Enter to complete the balancing procedure. The window displays the thermal balance or imbalance
diagnostic, as shown in Figure 80 below.

Figure 80: Thermal Balance (or Imbalance) Window

Click on Next Item/Enter to return to the Advanced window.

D.4 Factory Settings

The window for the Factory Settings command is similar to Figure 81 below.

Figure 81: Factory Settings Command

XMTC User’s Manual 89

Appendix D. The Enhanced Advanced Option

D.4 Factory Settings (cont.)

If you click on Upload to PC, you are prompted to create a file, as shown in Figure 82 below.

Figure 82: Creating a Data File

If you click on Download from PC, you are asked for a file name, as shown in Figure 83 below.

Figure 83: Downloading a Data File

However, if you click on Reset to Defaults, the status is displayed in the Factory Settings window. Click on Next
Item/Enter to confirm the entry. (Click Previous Item or Exit Page to close the window without changing the status.)

90 XMTC User’s Manual