Set Appliance State:

Gas Off
Isolate Mains Power to appliance as per TOPs P4
DHW Demand
Set performance tester to pressure setting
Remove tube from P2 on the air pressure sensor and connect air pressure test kit with t piece included in kit to the syringe and the negative on performance tester
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Run the boiler with DHW tap on with the gas off on the isolation valve.
Allow the fan to run.
Slowly start to pull out the syringe to create a 1mbar pressure on the performance tester.
As you reach 1mbar sparking should start to occur.