Safety Guide

XNX Universal Transmitter
3
Table of Contents
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