HP 4262A User Manual

Model 4262A
Section III
Figure 3-8
Note
Insutation resistance for Cx must be greater
than a certain minimum value. Refer to Table
3-4 for unusual operating indications.
Range
(at 120Hz) | 1000pF | 10.00nF | 100.0nF | 1000nF | 10.00uF
Mingrllum
0.01uF
0.1xF
1uF
10uF
10.00uF
M“‘;{‘l’“m
300kQ
|
100kQ
10kQ
1kQ
1000
In 1kHz(10kHz) measurement, multiply both range value and value
of C1 by 1/10 (1/100). If the calculated value of C1 is less than
0.01uF, use 0.01uF capacitor.
Note
DC withstand voltage for C1 capacitor must be
greater than dc applied voltage E. Also observe
polarity of capacitor C1 with respect to applied
voltage.
3. Set 4262A controls as follows:
SELFTEST..............ciiiiiinnnn.. OFF
FUNCTION. ...t i C
CIRCUITMODE. ......... ... PRL
Othercontrols.................... any setting
4. Read displayed value after allowing time for bias voltage to settle. Typical settling
times are:
120Hz: 6 to 7 seconds.
1kHz/10kHz: 2 to 3 seconds.
BIAS VOLTAGE SETTLING TIME
100
© 50
2
o /
3 /7
v 20
/
S //
L 10 &
§ 130z
& 5
&0
=}
= I_kH
b
Rl
Q 2
[72]
|
\y 104 100u 1000y 10m
Capacitance Reading (F)
If C1 and R1 which are larger than those given in table on
above are connected, longer settling times are necessary.
2. Minimum values for both C1 (dc blocking capacitor) and R1 are given in table below:
Figure 3-9. External DC Bias Circuit (Sheet 2 of 3).
3-21

HP 4262A Specifications

General

Brand	HP
Model	4262A
Category	Measuring Instruments
Language	English