11.2 Trouble Shooting
220
Replaceable parts and useful life
Certain parts require replacement periodically and at the end of their useful life: (Useful life depends on
the operating environment and frequency of use. Operation cannot be guaranteed beyond the following
periods)
Before returning for repair
Part Useful Life Remarks
Electrolytic
Capacitors
Approx. 10 years
The useful life of electrolytic capacitors depends on the operating envi-
ronment. The board(s) on which these components are mounted must
be replaced.
Lithium battery Approx. 10 years
The instrument contains a built-in backup lithium battery, which offers a
service life of about ten years. If the date and time deviate substantially
when the instrument is switched on, or backup error is returned in self-
test, it is the time to replace that battery. Contact your authorized Hioki
distributor or reseller.
Fan motor Approx. 6 years Assuming 24 hours of use per day
LCD backlight
(to half brightness)
Approx. 8 years Assuming 24 hours of use per day
Symptom Check Item, or Cause Remedy and Reference
The display does
not appear when
you turn the power
on.
Is the power cord unplugged?
Is it properly connected?
Confirm that the power cord is properly con-
nected.
See "3.4 Connecting the Power Cord" (p. 29)
Keys do not work. Are the keys locked?
Hold for three seconds to disable the
key-lock function.
The MENU key is
lit, but the screen is
blank
The LCD backlight is set to turn off after a speci-
fied interval.
Press any key.
See "LCD back light" (p. 128)
Voltage or current
measurement
values are not
displayed
Are the voltage measurement and current sensor
cables connected properly?
Check connections and wiring.
See "3.6 Connecting the Voltage Measure-
ment Cables" (p. 30), "3.12 Verifying
Correct Wiring (Connection Check)"
(p. 43)
Is the proper input channel displayed (e.g., when
measuring input on CH1, is the
[CH1] page dis-
played)?
Press to change the input channel
page.
See "4.2 Viewing Power Measurements,
and Changing the Measurement Con-
figuration" (p. 49)
Effective power is
not displayed.
Are the settings for voltage range/current range,
and zero-suppression correct?
Set appropriate values for voltage range/
current range.
When the input is too small in relation to the
range, set the zero-suppression to 0.1% or
OFF.
See "4.2.2 Selecting Ranges" (p. 51)
See "Chapter 6 Changing System Set-
tings" (p. 127)
Frequency mea-
surement is impos-
sible, measured
values are unstable
Is the input frequency within the range 0.5 Hz to 5
kHz?
Verify the input frequency using the noise
measurement function.
See "4.6 Viewing Noise Measurement Val-
ues (FFT Function)" (p. 83)
Is the input frequency below the lower limit set-
ting?
Set the lower limit frequency for measure-
ment.
See "4.2.4 Frequency Measurement Set-
tings" (p. 58)
Is the sync source input correct?
Is the range of the sync source input too high?
Check the sync source settings.
See "4.2.3 Selecting the Sync Source" (p. 56),
"4.2.2 Selecting Ranges" (p. 51)
Is the measurement target a largely distorted
waveform such as PWM?
Set the zero-crossing filter to "Strong".
See 4.2.3 "Setting the Zero-Crossing Fil-
ter" (p. 57)
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