Table Of Contents - Honeywell XNX Safety Manual

XNX Universal Transmitter
1 SIL 2 Certificate ........................................................................................................................................................................................... 3
1.1 XNX Gas Detector Transmitter ........................................................................................................................................................... 3
2 Overview ...................................................................................................................................................................................................... 4
3 Safety Parameters ....................................................................................................................................................................................... 5
3.1 Interval of Proof Testing ..................................................................................................................................................................... 6
4 Fault Diagnostic Time Interval .................................................................................................................................................................... 6
5 Proof Test ..................................................................................................................................................................................................... 7
5.1 Purpose of Proof Testing .................................................................................................................................................................... 7
5.2 Expected Outcome of Proof Testing ................................................................................................................................................. 7
5.3 Tolerance of Output Current Levels ................................................................................................................................................... 7
6 Proof Testing Procedure ............................................................................................................................................................................. 7
6.1 Checking ............................................................................................................................................................................................. 7
6.1.1 Force mA Output ....................................................................................................................................................................... 7
6.1.2 Zero Gas mA Output .................................................................................................................................................................. 8
6.1.3 Calibration Gas mA Output ....................................................................................................................................................... 8
6.2 Adjusting ............................................................................................................................................................................................. 8
6.2.1 Calibrate 4.0 mA and 20.0 mA .................................................................................................................................................. 8
6.2.2 Zero Gas Calibration and Span Calibration .............................................................................................................................. 8
6.2.2.1 Zero Gas Calibration............................................................................................................................................................... 9
6.2.2.2 Span Calibration ..................................................................................................................................................................... 9
6.3 Verifying mA Settings ....................................................................................................................................................................... 10
6.4 Testing ............................................................................................................................................................................................... 11
6.4.1 Fault and Alarm State .............................................................................................................................................................. 11
6.4.2 Gas Verification ........................................................................................................................................................................ 12

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