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MOTOROLA MVME162-431 Channel contact module

Keeping the target flame button depressed, use the flame strength LEDs to adjust the scanner “aim” to get maximum signal (1 LED is the lowest, 8 LEDs are the highest). Look for 3 to 4 LEDs as a minimum.The Flame Strength should BRIEFLY GO BELOW 6 LEDs. If the LEDs stay at 7 or above, add orifices to minimize the signal (see page 29). If the signal strength does not drop below 6 LEDs, then decrease the size of the orifice. This may require some testing to determine the correct size. Note: The “Ready” and “Target Flame” LEDs flash during the learn or store process until it has been completed.

IEC 61508-Proof Testing

According to section 7.4.3.2.2 f) of IEC 61508-2 proof tests shall be undertaken to reveal dangerous faults which are undetected by diagnostic tests. This means that it is necessary to specify how dangerous undetected faults which have been noted during the Failure Modes, Effects, and Diagnostic Analysis can be detected during proof testing. The suggested proof test consists of a functional test of the scanner to test the flame relay(s) plus a power cycle to test the fault relay, see Table 5. This test will detect ~ 25% of possible DU failures of the device.