Spectrex 40/40I Triple IR (IR3) Flame Detector - Manual (Page 79)

TM 40/40I, Rev (6) July 2013
40/40I Flame Detector 67
E.1.2.4 Other
1 The complete function of the flame detector (flame detection, function of
the 0-20mA interface, the relays) must be examined at least every six or
twelve months (see Safety Relevant Parameters on page 65, when the
flame detector must be switched OFF and ON.
2 The window of the sensor must be examined at appropriate time
intervals for partial contamination.
3 The HART and the RS 485 interfaces must not be used for the
transmission of the safety-related data.