5-3. Relative Readings
If the ZERO ADJ switch is pressed in ACA measurement mode, the input applied at
the time is stored as a zero reference point.
① When ZERO ADJ switch is pressed under the clamping condition, “ZERO ADJ”
mark is displayed with the indication of 0.0, 0 or 0.00.
② The deviations from this point are displayed for subsequent measurement.
5-4. MAX/MIN HOLD Measurement
This function is used to measure the maximum value or minimum value in the
measurements. In this mode, the auto power off function is automatically canceled.
① Set the POWER switch to "ON".
② Set the ACA/DCA selector switch to ACA or DCA depending upon the signal to be
measured.
③ Set the range to the appropriate range.
④ Press the ZERO ADJ switch to read zero for the DC current measurement.
⑤ Clamp the conductor of the circuit under test with clamp transducer..
⑥ Read the displayed value. Press the MAX HOLD or MIN HOLD switch once,
“MAX-H” or “MIN-H” mark is displayed. In this mode, the maximum value or
minimum value is displayed for subsequent measurement. To release, press the
switch again.
⑦ After measurement, set the POWER switch “OFF”.
CAUTION
If ex
cessive high current is applied to the clamp transducer, the zero adjustment
is disabled due to the magnetic charge of the clamp transducer. In such case,
discharge the magnetized clamp transducer as follows.
① Set the POWER switch to "ON".
② Set the range to AC 200mA range.
③ Apply AC 10A to the clamp transducer (by clamping), and reduce the applied
current gradually to zero. The magnetic charge will be discharged.
‐7‐
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