Hioki 3285-20, Instruction Manual, Page: 82 / 85

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5.3 Troubleshooting
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If no power is supplied:
Check that it has sufficient remaining power. (See 2.1.4:
Battery Low Warning (When
mark lights) )
The counter doesn't become zero:
In DCA, AC+DCA, or DCV mode
Use the auto-zero adjustment function (See 3.1.1).
(If this occures in AC+DCA mode after performing the
auto-zero-adjustment, perform the zero cancel correction
function.)
In ACA, ACV, or AC+DCV mode
Use the zero-cancel correction function (See 3.1.2).
Resistance measurement or continuity check
If 0
Ω
is displayed when the red and black test leads are
unconnected (open-circuit), internal circuitry may be
damaged, requiring repair service.
The measured value is larger than the estimated
value.
Current / Voltage / Frequency measurement:
Check that you're using the proper range.
Examine the waveform to confirm that no components
but the estimated frequency are being used.
Check that the counter has been reset with
0ADJ/RESET
button before peak measurement.
Look for magnetic fields, electrical fields or possible
noise sources near the instrument.
Check the waveform. Some special frequencies can't be
measured, such as those of inverters. (At frequency
measurement)
Other symptoms that may occur are as follows.