XMTC - Panametria

1 GE Infrastructure Sensing Model XMTC. Thermal Conductivity Transmitter User's Manual 910-217D. December 2004. The Model XMTC is a GE Panametrics product. GE Panametrics has joined other GE high-technology sensing businesses under a new name GE Infrastructure Sensing. December 2004. Warranty Each instrument manufactured by GE Infrastructure Sensing, Inc. is warranted to be free from defects in material and workmanship. Liability under this warranty is limited to restoring the instrument to normal operation or replacing the instrument, at the sole discretion of GE Infrastructure Sensing, Inc. Fuses and batteries are specifically excluded from any liability. This warranty is effective from the date of delivery to the original purchaser. If GE Infrastructure Sensing, Inc. determines that the equipment was defective, the warranty period is: one year for general electronic failures of the instrument one year for mechanical failures of the sensor If GE Infrastructure Sensing, Inc.

2 Determines that the equipment was damaged by misuse, improper installation, the use of unauthorized replacement parts, or operating conditions outside the guidelines specified by GE Infrastructure Sensing, Inc., the repairs are not covered under this warranty. The warranties set forth herein are exclusive and are in lieu of all other warranties whether statutory, express or implied (including warranties of merchantability and fitness for a particular purpose, and warranties arising from course of dealing or usage or trade). Return Policy If a GE Infrastructure Sensing, Inc. instrument malfunctions within the warranty period, the following procedure must be completed: 1. Notify GE Infrastructure Sensing, Inc., giving full details of the problem, and provide the model number and serial number of the instrument. If the nature of the problem indicates the need for factory service, GE Infrastructure Sensing, Inc.

3 Will issue a RETURN. AUTHORIZATION number (RA), and shipping instructions for the return of the instrument to a service center will be provided. 2. If GE Infrastructure Sensing, Inc. instructs you to send your instrument to a service center, it must be shipped prepaid to the authorized repair station indicated in the shipping instructions. 3. Upon receipt, GE Infrastructure Sensing, Inc. will evaluate the instrument to determine the cause of the malfunction. Then, one of the following courses of action will then be taken: If the damage is covered under the terms of the warranty, the instrument will be repaired at no cost to the owner and returned. If GE Infrastructure Sensing, Inc. determines that the damage is not covered under the terms of the warranty, or if the warranty has expired, an estimate for the cost of the repairs at standard rates will be provided.

4 Upon receipt of the owner's approval to proceed, the instrument will be repaired and returned. iv December 2004. Table of Contents Chapter 1: Features and Capabilities Overview .. 1-1. Basic Features .. 1-1. Theory of Operation .. 1-2. System Description.. 1-3. Packaging and Temperature Options .. 1-3. 2-Port (Sealed Reference Gas) Version .. 1-4. 4-Port (Flowing Reference Gas) Version .. 1-5. Sample System.. 1-7. Extra Cable (optional) .. 1-7. Power Supply (optional) .. 1-7. TMO2D-TC Display (optional) .. 1-7. XDP Display (Optional) .. 1-7. Typical Applications .. 1-8. Chapter 2: Installation Introduction.. 2-1. Mounting the XMTC Transmitter.. 2-1. Mounting the Sample System .. 2-2. Manual, 2-Port (Sealed Reference Gas) Sample System .. 2-2. Manual, 4-Port (Flowing Reference Gas) Sample System .. 2-3. Sample Systems with Automatic Switching.

5 2-4. Wiring the XMTC Transmitter.. 2-5. Grounding the Enclosure.. 2-5. CE Mark Compliance.. 2-6. Cable Specifications .. 2-7. Wiring the Signal Connections.. 2-8. Connecting to Other Components .. 2-11. PS-24 Power Supply .. 2-11. TMO2D Display .. 2-12. XDP Display .. 2-12. Moisture Series Analyzers .. 2-12. v December 2004. Table of Contents (cont.). Chapter 3: Operation and Programming Introduction .. 3-1. Powering Up the XMTC .. 3-1. Starting the Sample Gas .. 3-1. Programming with IDM .. 3-2. The Edit Functions Menu.. 3-2. Field Cal .. 3-3. Perform Cal .. 3-4. Configure Cal .. 3-5. Calibration Drifts .. 3-8. Clear Calibration .. 3-9. Hold Last Value .. 3-9. 4-20 mA Output .. 3-10. 4-20 mA Range .. 3-10. 4 and 20 mA Cal.. 3-11. 4-20 mA % Test .. 3-12. % Gas Test .. 3-13. Error Handler .. 3-14. Total Drift Error.. 3-14. Drift/Cal Error.

6 3-16. Gas mV Under/Over Range .. 3-16. Gas % Under/Over Range.. 3-17. Factory Cal .. 3-18. Edit # of Points .. 3-18. Edit Point X.. 3-19. The Advanced Option .. 3-20. Fast Response .. 3-21. Language .. 3-21. Meter ID .. 3-23. Chapter 4: Calibration Introduction .. 4-1. Gas Ranges and Types .. 4-1. Required Equipment and Materials.. 4-2. Preparing the Transmitter for Calibration .. 4-3. 2-Port (Sealed Reference Gas) Calibration.. 4-5. 4-Port (Flowing Reference Gas) Calibration.. 4-6. Chapter 5: Specifications Performance.. 5-1. Functional .. 5-2. Physical .. 5-2. Accessories .. 5-3. vi December 2004. Table of Contents (cont.). Appendix A: Supplemental Information Ordering Information .. A-1. Calibration Specification Ordering Information.. A-2. XMTC PCB Subassemblies.. A-3. Sample Calibration Sheet .. A-3. Relative Thermal Conductivity of Common Gases.

7 A-4. Appendix B: Applications H2 in N2 in Heat Treat Furnace Atmospheres .. B-1. Problem.. B-1. Equipment .. B-1. Basic Operating Procedure.. B-2. Permanent Installation.. B-3. Specifications .. B-3. Detailed Operating Procedure .. B-3. H2 Purity in H2-Cooled Electricity Generator .. B-6. Problem.. B-6. Equipment .. B-6. Basic Operating Procedure.. B-7. How Previously Handled .. B-8. Permanent Installation.. B-8. Specifications .. B-8. Detailed Operating Procedure .. B-8. Appendix C: Outline and Installation Drawings Appendix D: The Enhanced Advanced Option Entering the Enhanced Advanced Option .. D-1. Heater .. D-3. Balance Bridge .. D-5. Factory Settings.. D-6. Temperature Comp.. D-8. vii Chapter 1. Features and Capabilities Overview .. 1-1. Basic Features.. 1-1. Theory of Operation .. 1-2. System Description .. 1-3. Typical Applications.

8 1-8. December 2004. Overview This section introduces you to the features and capabilities of the GE. Infrastructure Sensing 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. Also, information on optional components for your system is 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. Basic Features The GE Infrastructure Sensing 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.

9 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 insensitivity to 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; or the plug-in measuring cell can be replaced with a pre-calibrated spare in minutes.

10 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 4,000 ft (1,200 m). from a display or recorder, using inexpensive, unshielded cable. Features and Capabilities 1-1. December 2004. 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.