Hioki Super megohm SM7110 - Measurement Items

158
Troubleshooting
Measurement items
No. Trouble Conrm Possible causes → Solution Reference
2-1
Measured
values are not
stable.
Measurement
lead
Self-
fabricated
Electromagnetic induction a󰀨ects the
measured values.
→ Guard the cable, including its end
as close to the measured object as
possible.
p. Appx.13
Measured
object
Temperature
has not been
stabilized.
Characteristics have changed
depending on the temperature.
→ Perform measurements after the
uctuation in temperature becomes
moderate.
–
Temperature
sensor
Not inserted
all the way
in.
The Humidity Sensor is not correctly
connected.
→ Insert the Humidity Sensor all the
way in.
p. 31
EXT I/O items
No. Trouble Conrm Possible causes → Solution Reference
3-1
The instrument
does not operate
at all.
Does the EXT I/O test
result, which is the status
of the input and the
output displayed on the
instrument, match with
that of the controller?
Wiring etc. is incorrect.
→ Check the EXT I/O in terms of the
following:
• Loose connection of the connectors
• Pin numbers
• Wiring of the ISO_COM terminals
• NPN/PNP settings
• Contact (or open collector) control
(Not controlled by voltage)
• Power supply to the controller
(Power to the instrument is not required.)
p. 110
3-2
Trigger is not
applied.
Trigger source
The trigger mode is set to the internal trigger.
→ Set it to the external trigger.
p. 58
Is the on-state time of
TRIG more than 0.1 ms?
The on-state time of TRIG is insu󰀩cient.
→
Ensure an on-state time of 0.1 ms or more.
–
3-3
EOM is not
output.
Are the measured values
updated?
Check Q&A in 3-2. –
EOM signal logic
The EOM signal will be in the on state once the
measurement is completed.
p. 113
3-4
HI, IN, and LO
signals are not
output.
Are the judgment
results displayed on the
instrument screen?
Check Q&A in 1-3. p. 157