Hioki IM7580, Instruction Manual

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298
Troubleshooting
Symptoms Check item or cause Solution/Reference
Measurement values
are exhibiting excessive
variations.
Is the signal level setting too low?
Change the signal level setting.
(LCR: p. 38, ANALYZER: p. 89)
Is an error from “13.4 Error Display”
(p. 303) being displayed?
Check the item indicated by the error
display, address the cause, and perform
measurement.
• If REF VAL is being displayed, check
measurement conditions such as the
frequency and signal level, and select
conditions for which REF VAL will not
be displayed.
See “Measurement range” (p. 274).
• If the instrument has not been calibrated
( UNCAL ), perform calibration first.
Are you using the instrument in a high-
noise environment?
If you are using the instrument in a high-
noise environment, consider taking the
following measures:
• Install guards.
• Implement anti-noise measures.
• Separate the sample, measurement
cables, and this instrument from the
source of the noise (motor, inverter,
electromagnetic switch, power line and
equipment generating sparks, etc.) or
perform the measurement in a separate
room.
• Use a power source from an outlet that
is grounded properly.
• Use a separate power supply that is not
connected to the device generating the
noise.
Are the cables between test head and
this instrument, the test head and fixture
properly connected?
• Check the wiring method and correct if
required.
• Use specified cables.
Did you perform open and short
compensation?
Perform open and short compensation
properly. (p. 139)
Are you using an extended cable from
DUT port to the test sample?
Use shortest possible routing for the
cable extension the DUT port to the test
sample.