HP 4262A Operating And Service Manual page 50

Section III
Table
3-4
Model 4262A
Table 3-4. Unusual Operating Indications (Sheet 4 of 4).
Indication:
Cause of trouble:
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.
The measurement reading of sample
depends on the level of measurement
test signal applied.
What to do:
Set LCR RANGE to MANUAL.
Manually settle the instrument on
an appropriate range.
Indication:
When a capacitor is measured with dc bias
voltage applied, an abnormal display occurs.
There are limitations to the permissible
insulation resistance of a capacitor
measured with dc bias. See table below.
MODE
RANGE
1kHz
Cp
100. OpF 1000pF lO.OOnF 100. OnF lOOOnF
Cs
100. OnF
lOOOnF lO.OOpF 100. OpF
1000 pF
Permissible
insulation
resistance (Ri)
3000kft 300kft
3Qkft
3000ft
Note
In 120Hz(10kHz) measurement, multiply range value by 10(1/10).
Ri given in above table is applicable for a dc bias of 40 V. When the
bias voltage is less than 40V, Ri limit is RiVb/40 (ft) where Ri is
value given in the table and Vb is applied dc bias voltage.