12.1 Troubleshooting
163
12
2-2 Measured val-
ues differ from
expected values.
(A negative value
is shown.)
Zero-adjustment ON Zero-adjustment is not accurate.
Perform zero-adjustment again.
p.44
p.35
OFF Values are being affected by wir-
ing resistance or thermoelectric
power due to two-terminal mea-
surement.
Perform zero-adjustment.
p.44
Scaling function ON The offset setting is incorrect.
Turn scaling OFF, or reconfigure
the setting properly.
p.54
p.35
The measurement leads are not
connected properly.
Check the connections.
p.34
p.35
Other: See No. 2-1 above.
p.162
2-3 No measured
value is dis-
played.
(Concerning the
display of mea-
sured value
faults, see also
p.38.)
Measured values
- - - - -
There is a break in the measure-
ment leads.
Replace the measurement
leads.
p.26
The contact resistance is too high
(for user-made leads).
Increase the contact pressure.
Clean or replace the probe tips.
−
The wiring resistance is too high
(for user-made leads).
Make the wiring thicker and
shorter.
−
OvrRng The measurement range is low.
Select a high-resistance range
or use auto-ranging.
p.32
Nothing is
shown.
Auto-ranging is not selecting a
range.
See No. 2-4 below.
p.163
No measured
value is shown,
even if the mea-
surement leads
are shorted.
The fuse may have tripped.
Cycle the instrument's power
and perform the self-test to
check whether the fuse has
tripped.
The measurement and guard termi-
nals can short each other.
Check whether the measurement
leads are damaged.
p.29
2-4 Auto-ranging is
not selecting a
range.
Measurement target Transformer,
motor
Auto-ranging is not able to select
a range for measurement targets
that have high inductance.
Use a fixed range.
p.32
Noise may be affecting measurement. See Appendix 7(1)(2).
p.A13
No Issue Items to check Possible causes Solutions See
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