SAFETY MANUAL XNX™ Universal Transmitter XNX UNIVERSAL TRANSMITTER
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XNX Universal Transmitter Table of Contents 1 SIL 2 Certificate ........................................................................................................................................................................................... 3 1.1 XNX Gas Detector Transmitter ........................................................................................................................................................... 3 2 Overview ........................................................
XNX Universal Transmitter 1 SIL 2 Certificate 1.2 XNX ECC Sensor (Toxic gases) 1.
XNX Universal Transmitter Table 2. Probability of a Dangerous Failure Per Hour (High Demand System) 2 Overview Safety Integrity Level 4 3 2 1 IEC 61508 is a generic functional safety standard. Functional safety is defined in this standard as “part of the overall safety relating to the Equipment Under Control (EUC) and the EUC control system which depends on the correct functioning of the E/E/PES1 safety related systems, other technology safety-related systems, and external risk reduction facilities.
XNX Universal Transmitter 3 Safety Parameters The safety parameters listed below are a combination of the main board, personality board, and sensor. These numbers were provided by TUV in report 968/EZ 319.07/20. For safety parameters of the individual sensors, refer to the XNX Safety Parameters For Sensors white paper. Safety PFDavg** Architecture Component SIL Level* SIL2 1oo1 XNX Universal Transmitter with Combustible Sensor (IR board) λ (fit) λDu (fit) 14768.96 447.
XNX Universal Transmitter Safety PFDavg** Architecture Component SIL Level* SIL2 1oo1 XNX Universal Transmitter Standalone XNX Transmitter (main board) λ (fit) λDu (fit) 9283.11 395.99 SFF % DC % Test Report 1.71E-03 95.54 >90% λDd (fit) λD (fit) SC PTC % 4294.22 4690.21 2 100 TUV 968/EZ 319.07/20 *This rating is highest achievable SIL level the XNX, Searchpoint Optima Plus gas detection system can achieve as standalone safety devices.
XNX Universal Transmitter 5 Proof Test 6 Proof Testing Procedure 5.1 Purpose of Proof Testing 6.1 Checking A proof test is a periodic test to detect failures in the system so that, if necessary, the system can be restored to an “as new” condition or as close as practical to this condition. The purpose of checking is to ensure the mA output meets the expected levels. If the current does not meet the expected levels, it will have to be adjusted. If, after completing 6.1.1, 6.1.2, and 6.1.
XNX Universal Transmitter 6.1.2 Zero Gas mA Output The procedure for zero gas is not applicable to the ECC O2 sensor. 1. Apply zero gas to the sensor. 2. The current at the controller end should be 4.0 mA. If the mA output is not at the expected level when applying zero gas, perform a Zero Gas Calibration. Refer to 6.2.2 and complete the procedure for a Zero Gas Calibration. 6.1.3 Calibration Gas mA Output Figure 2. Adjusting Current 4.
XNX Universal Transmitter 6.2.2.2 Span Calibration NOTE: If a Span Calibration is not required, select ✖ to skip the Span Calibration and return to the Calibration Menu. 6.2.2.1 Zero Gas Calibration Sensor Reading at Current Settings 1. When the Zero Gas Calibration is complete, the Span Concentration screen appears. The gas concentration for the Span Gas Calibration can be changed. If the Span Calibration is skipped, the Gas Calibration screen displays. Figure 4.
XNX Universal Transmitter proper range to accurately detect the target gas. Selecting ✖ will cancel the span calibration and return to the Gas Calibration Menu. 4. When the sensor has completed the calibration and the span algorithms have determined that it is within range, the Span Passed screen will appear. Figure 11. Exiting Zero Gas and Span Gas calibrations WARNING While XNX is in Inhibit Mode, alarms are silenced. This will prevent an actual gas event from being reported.
XNX Universal Transmitter 3. Refer to Table 6 for the mA levels. If the values do not match the values in the table, proceed to step #4 to adjust the values. NOTE If the values for the faults and warnings have been changed from the default settings since installation, ensure the current output matches those changed values. Figure 14. mA Settings Saved NOTE: If ‘3’ is not selected, none of the changes will be saved. Table 3.
XNX Universal Transmitter confirmation screen. Figure 20. Alarm/Fault Reset Screen Figure 17. Confirmation As in an alarm simulation, a confirmation screen will appear. Selecting ✓ will simulate the selected alarm. If the ✖ is selected, the simulation is aborted. 4. To simulate a Warning or Fault from the XNX, select the appropriate icon from the menu. Figure 21. Alarm/Fault Reset Screen Selecting will reset all alarms, faults or warnings generated by the simulation.
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Find out more www.sps.honeywell.com Contact Honeywell Analytics: Europe, Middle East, Africa Life Safety Distribution GmbH Tel: 00800 333 222 44 (Freephone no.) Tel: +41 (0)44 943 4380 (Alternative no.) Middle East Tel: +971 4 450 5800 (Fixed Gas Detection) Middle East Tel: +971 4 450 5852 (Portable Gas Detection) gasdetection@honeywell.com Americas Honeywell Analytics Inc. Tel: +1 847 955 8200 Toll free: +1 800 538 0363 detectgas@honeywell.
