XNX Universal Transmitter
Fault Diagnostic Time Interval
7
Interval of Proof Testing
Component
SIL Level*
Safety
Architecture PFDavg**
SFF %
DC %
Test Report
XNX Universal Transmitter Standalone XNX Transmitter (main board)
SIL2
1oo1
1.71E-03
95.54
>90%
TUV 968/EZ 319.07/20
λ (fit)
λ
Du
(fit)
λ
Dd
(fit)
λ
D
(fit)
SC
PTC %
9283.11
395.99
4294.22
4690.21
2
100
*This rating is highest achievable SIL level the XNX, Searchpoint Optima Plus gas detection system can achieve as standalone safety devices. In more complex safety system the above values are the safety parameters of XNX and
Optima gas detection system required to determine the acceptance of the complete safety function (i.e., all safety parameters, safety architecture, etc.) as required by IEC 61508 and IEC 61511.
**Denotes a proof test interval of one year.
3.1 Interval of Proof Testing
1-year interval proof test is required for XNX SIL compliance.
Perform the proof test once a year to comply with IEC 61508.
Section 6 Proof Testing Procedure outlines the actions that must
be completed for a proof test.
4 Fault Diagnostic Time Interval
XNX conducts approximately 30 diagnostics total on the main
board and personality board. These diagnostics occur at different
time intervals, with the longest interval at 24 hours. But when a
fault is detected, it is reported within 3 seconds. Refer to the XNX
Technical Manual for more information on diagnostics.
