HP 4155A, User'S Task Manual

Page: 248 / 279

If Y ou Have A Problem
When Y ou Make A Measurement
If Y ou Get Unexpected Data when P erforming Sam-
pling Measurement
If initial interval is set to a short time and if FIL TER ON is set, you may get
unwanted data. FIL TER ON causes a slower rise time , so short initial interval
will sample during this rise time .
T o solve this problem:
Set FIL TER eld to OFF if you set initial interval to a short time .
Some data may be skipped because measurement takes a long time .
Measurement takes a long time if measurement is performed in a low current
range , if many measurement channels are set up , or if analysis , such as
moving a marker , is performed during measurements .
T o solve this problem:
Measure current using a xed range that is more than 10 A. F or
measurement ranges 10 A or less , measurement takes longer than the
specied integration time .
Decrease measurement channels to reduce measurement time .
Note that the number of measurement channels automatically increases if
you do both the following: force voltage from channels that are connected
to R-Box and display the voltage values or use voltage values in user
functions . The channels automatically measure current, which is used to
compensate the voltage values .
Do not perform analysis operation during measurement state
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