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Xentaur
Transmitter
XDT
Xentaur XDT User Manual
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Table of Contents
Default Chapter
6
Table of Contents
6
1 Overview of the Dewpoint Transmitter Model (DT)
8
2 Sensor and Sampling Techniques
10
Precautions Using the Sensor
10
Sensor Technical Specifications
11
Sensor Installation & Sampling Techniques
11
In-Situ Installation
12
Extractive Installation
13
Mechanical Installation
14
Troubleshooting Unexpected Readings
15
3 Instrument
16
Precautions Using the Dewpoint Transmitter (DT)
16
Electromagnetic Compatibility Considerations
16
Instrument Technical Specifications
17
Installation
18
Instrument Mechanical Installation
18
DT-PM (DIN43700) Enclosure Installation
18
DT-NEMA (IP65) Enclosure Installation
18
Electrical Connections
19
Connecting Power
19
AC Mains Electrical Power Connection
20
Low Voltage DC Powered Option - Electrical Power Connection
20
Sensor Connection
20
Wiring the Alarm Contacts
20
Interfacing to the Analog Output
21
Interfacing to the RS-232 Option
22
Operating the Instrument
22
Starting up
22
Display Conventions
23
Push Buttons
23
Operating State
24
Viewing Dewpoint Mode
24
Alarms
26
Start Calibration
27
Spancheck™ Mode
28
Single Point Self Calibration, Manual or Scheduled
29
Viewing Serial Number Mode
32
Setup State
32
Resetable Audio-Visual Alarm Option (NFPA Compliant)
35
Troubleshooting the Instrument
36
Maintenance
38
Glossary
40
Appendix A: Flow Diagram of Operating State User Interface
44
Appendix B: Flow Diagram of Set-Up State User Interface
46
Appendix C: Sensor Mechanical
47
Appendix D: Optional Sensor Fittings
48
Appendix E: DT Circuit Board Dimensions
49
Appendix F: Sensor/Spancheck™ Theory of Operation
52
Appendix G: Dewpoint Response Time Analysis
53
Appendix H: Sample Gas Filter Considerations
55
Appendix I: DT Grounding Considerations
56
Appendix J: Analog Output Vs. Dewpoint
57
Appendix K: RS-232C Interface Protocol
59
Appendix L: Procedure for Exchanging DT Sensors
62
Appendix M: Uncertainty in LBS & Ppmv Calculations
63
Serial Number
64
Index
66
4
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Xentaur XDT Specifications
General
Accuracy
±3% RH
Operating temperature
-20°C to +60°C (-4°F to +140°F)
Output signal
4-20 mA
Power supply
12-28 VDC
Measurement range
0-100% RH
Enclosure Rating
NEMA 4X