HP 4262A Operating And Service Manual page 50

3-26
Table 3-4. Unusual Operating Indications (Sheet 4 of 4).
Indication: Cause of trouble:
The measurement reading of sample
depends on the level of measurement
test signal applied.
When a sample (for example, an iron core
inductor) is measured in AUTO of CIRCUIT
MODE, the instrument repeats range
selection and does not complete the meas-
urement depending upon level of test current
used,
What to do:
Set LCR RANGE to MANUAL,
Manually settle the instrument on
an appropriate range.
Indication:
When a capacitor is measured with de bias There are limitations to the permissible
voltage applied, an abnormal display occurs. insulation resistance of a capacitor
measured with dc bias, See table below,
| mm | | 100.0F | 1000pr | 10.00nF | 100.00F f 10000
Permissible i
insulation | 30MQ 3000k2 300K2 30k82 30002
resistance (Ri)
Note
In 120Hz(10kHz) measurement, multiply range value by 10(1/10).
Ri given in above table is applicable for a de bias of 40V. When the
bias voltage is less than 40V, Ri limit is RiVb/40 (N) where Ri is
value given in the table and Vb is applied de bias voltage.