Hioki IR5050 - Page 116

116
Troubleshooting
Problem Possible cause Action Reference
The measured value
di󰀨ers for each
measurement, even
though the object
under measurement is
the same.
Material of the object under
measurement is having an
e󰀨ect.
After a measurement,
wait a su󰀩cient amount of
time (1 hour to 1 day as a
general rule) before taking
a new measurement.
The e󰀨ect of polarization*
2
will be more apparent for
higher insulation resistance
values.
–
Temperature and humidity
characteristics of the object
under measurement are
having an e󰀨ect.
Measure in an environment
with the same temperature
and humidity. An insulating
material typically has
characteristics in which
insulation resistance
decreases as temperature
and humidity increase.
Reference: There are
certain insulated cables
in which the insulation
resistance decreases
to 1/4 or less when the
temperature increases
10
°
C.
–
*1. Even with new alkaline batteries, it may not be possible to use batteries with a
large internal resistance as the amount of obtainable energy will be low. If the
instrument does not work when using new batteries, use batteries from a di󰀨erent
manufacturer.
*2. Polarization: The phenomenon in which positive and negative charges on the
atoms of a material move in opposite directions causing a shift of the
center when an electric eld is applied to the material.
If the cause is unknown, try resetting the system.
See: “8.4 System Reset” (p. 118)
HIOKI IR5050A961-00