Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Gain access to mains terminal strip as necessary
Use isolation mat as required
Ensure NO Demands
Use isolation mat as required
Ensure NO Demands
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the AC voltage between the flame sense electrode lead (whilst attached to the flame sense electrode) and the Neutral at the incoming mains terminal block.
Expect approximately 56 VAC
Expect approximately 56 VAC
Isolate as per TOPs P4
and refit as necessary