Pfaff expression 2014 Service Manual page 108

IV Stray current: Milliampere = mA
Sewing machine plug remains in tester socket.
Use clamp to attach test lead of testing appliance M 5013 to presser bar.
Set knob for measuring range at "20 mA" (fig. 118).
Meter reading: maximum 0.50 mA.
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