Iwatsu SS-540 Instruction Manual page 37

3.3 Inspection
1. Set the oscilloscope input to GND and adjust the trace to
the zero position.
2. Set the oscilloscope input coupling to DC.
3. With the sensor head on the current probe completely
closed, connect this instrument (SS-540 or SS-550) to the
oscilloscope and press the DEMAG switch. Immediately
after the switch is pressed, a sine wave of approximately
300 mVp-p will be output, gradually becoming attenuated
and stopping after a few seconds. Check to make sure that
this occurs.
4. Turn the zero adjustment dial and check to make sure that
the trace is at the zero position.
Chapter 3 Daily check and calibration
33