Jinhan JDS2012Q Manual page 5

At this time, press the OK key again to enter the waveform test (you can also press the return key
to return to the previous menu)
Routine 2 (use of current clamp):
Select primary ignition (current), OK key to confirm after entering the oscilloscope:
Note: At this time, the relevant parameter values of the oscilloscope interface have been
adjusted to the current unit A, and all current parameters can be read directly.