Hioki 3285-20, Instruction Manual, Page: 45 / 85

24 _______________________________________________________
2.2 Current Measurement
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SLOW PEAK FAST
(The unit
symbol blinks.)
Hz
(Except
DC)
NORMAL
2.2.4 Peak Hold Measurement
At any range, gross errors may occur at 1% or below of the
range,whose accuracy is not guaranteed as a result of
internal corrective calculations.
The value may sometimes not show 0 when the power is
switched on, but this is not an instrument fault. Please
execute auto zero adjustment before measuring.
The peak value of measured current is retained on
the display to simplify reading. Peak fluctuations
can also be viewed.
1. Press button and select a measurement mode for
the measured circuit.
2. In DC A and AC+DC A modes, make an auto-zero-
adjustment by
0ADJ/RESET
button (See 3.1.1:
Auto-Aero Adjustment Function).
3. Set to
PEAK
. The measurement mode is switched
by
SLOW/PEAK/Hz
button as follows.
4. Switch between the auto and the manual range as
necessary. (If you are unable to estimate the peak
current value, start at the 2000A range.)
5. Before the measurement, press
0ADJ/RESET
button
to reset the residual data.
6. Open the top ends of the clamp core and clamp the
measured conductor so that it passes through the
center of the clamp core.