Note:
* It can only sum up the current measurement value. The
maximum and minimum value cannot be summed up.
* Only at KW range can carry out sum of watts measurement,
other ranges cannot carry out this measurement.
* When testing has been completed, disconnect the
connection between the testing leads and the circuit under
test and remove testing leads from the input terminals.
6.3. AC Voltage (main display) + Frequency (secondary
display) Measurement
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