HP 4262A User Manual

Section III
Figure 3-8
Model 4262A
Using Current Bias (for inductors).
1. Connect dc power supply as shown below:
Note
DC power supply should be floated from ground.
If
cable
between
low
terminals
of
4262A
and
power
supply
is
relatively
long,
it
should
be
shielded cable. The outer conductor is con-
nected to GUARD terminal.
TO . DC BIAS Connector
DC AMMETER
N
O_
— O+
O
DC POWER SUPPLY
\
o, O
—0-
2. Set 4262A controls as follows:
DCBIAS. . .. i ittt e EXT
FUNCTION. . ...ttt it iiiiaanns L
CIRCUITMODE. ................ PRL or SER
LCRRANGE .......... ..ot MANUAL
Othercontrols. .. ............ ... any settings
Note
First, determine appropriate range by connect-
ing sample with no dc bias current applied.
Then hold the range.
3.
Recommended
inductance
ranges
and
maximum
bias
currents
are:
Range (at 120Hz) 1000 #H 10.00 mH | 100,0 mH | 1000 mH 10.00 H 100.0 H
CIRCUIT MODE SER PARA
Maximum Bias 40mA 36mA | 13mA | 40mA | 36mA | 13mA
*Bias current when +40V is applied to DC BIAS connector.
In 1kHz(10kHz) measurement, multiply range value by 1/10 (1/100).
CAUTION
DC BIAS OVER +40 VOLTS MUST NOT BE AP-
PLIED TO EXTERNAL DC BIAS INPUT CON-
NECTOR.
Figure 3-9. External DC Bias Circuit (Sheet 3 of 3).
3-22

HP 4262A Specifications

General

Brand	HP
Model	4262A
Category	Measuring Instruments
Language	English