A Safety Integrity Level-certified system can detect the majority of XNX Transmitter Sensor safe and unsafe failures. XNX is SIL 2 capable per IEC 61508. XNX is SIL 3 capable in a redundant system per IEC 61508. Table 1 IR Personality...
3 Safety Parameters 3.1 Interval of Proof Testing If the XNX is used in high demand systems, a proof test is not required. The safety parameters listed below are a combination of the main If the XNX is used in low demand systems (defined as 1 demand or board and personality board.
24 hours. But when a fault is if necessary, the system can be restored to an “as new” condition or detected, it is reported within 3 seconds. Refer to the XNX Technical as close as practical to this condition.
Test Menu. For more information on setting If the mA output is not at the expected level when applying the mA output levels for normal operation, see mA Levels in the XNX calibration gas, refer to 6.2.2...
When the concentration values are stable select 6.2.2 Zero Gas Calibration and Span Calibration to allow the XNX to calculate the zero adjustment. Selecting ✓ The following section outlines the steps for calibrating the attached will return to the Gas Calibration Menu.
XNX Universal Transmitter 6.2.2.2 Span Calibration Selecting will cancel the span calibration and return to the ✖ Gas Calibration Menu. NOTE: 4. When the sensor has completed the calibration and the span If a Span Calibration is not required, select to skip the Span ✖...
#4 to adjust the values. WARNING NOTE While XNX is in Inhibit Mode, alarms are silenced. This will prevent If the values for the faults and warnings have been changed an actual gas event from being reported. Inhibit Mode must be reset from the default settings since installation, ensure the current after testing or maintenance activities.
Low Signal is from 1.0 to 4.0 mA and for an overrange condition, the range is 20.0 to 22.0 mA. Refer to Section 5 Warnings/Faults in the XNX Technical Manual for more information. 5. Once all changes have been made, use the switches to move to the ‘3’...
XNX Universal Transmitter 4. To simulate a Warning or Fault from the XNX, select the As in an alarm simulation, a confirmation screen will appear. appropriate icon from the menu. Figure 21. Alarm/Fault Reset Screen Selecting will reset all alarms, faults or warnings generated Figure 18.
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