HP 4262A Operating And Service Manual page 46

Section III
Figure 3-8
Mode! 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 dc ammeter
2. Set 4262A controls as follows:
DC BIAS........._......-...... EXT
FUNCTION... L
CIRCUIT MODE. ............... .PRL or SER
LCR RANGE ... . .MANUAL
Other controls. .. 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
uH
10.00 mH 100.0 mH 1000 mH 10.00 H
100.0 H
CIRCUIT MODE
SER
PARA
Maximum Bias
Current
40mA 36mA 13mA 40mA 36mA 13mA
In IkHz(lOkHz) 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).