HP 4262A - Page 121

Section V
Model 4262A
ADJUSTMENT
5-16
Reset integrator test switch A22S1 to off.
Connect Test Leads (HP P/N: 16361-61605) between 4262A UNKNOWN terminals
and 16361A DUT Box as shown in Figure 5-11 (a).
Set 16361A LCR RANGE to 1000pF.
Note dissipation factor readout on DQ display.
Manually change 4262A LCR RANGE to 10nF.
The change in dissipation factor readout between that obtained in step g and that in
step h should be less than £1 count. If not satisfactory, readjust “ZOF”’ potentio-
meter A14R1 (step a).
Set 4262A LCR RANGE to AUTO.
Set 16361A LCR RANGE toD =1.8.
Verify that DQ display count is the calibrated value of 16361A within 3 counts.
If this test fails, readjust ‘“APAO” potentiometer A14R15 (step b).
PROCEDURE B.
g.
h.
Set integrator test switch A22S1 to off.
Attach HP 16061A Test Fixture to 4262A UNKNOWN terminals as shown in Figure
5-11 (b).
Connect 10nF capacitor to the 16061 A as DUT.
Manually set 4262A LCR RANGE to 10nF.
Adjust “ZOF” potentiometer A14R1 for the calibrated value of DUT £1 count on
4262A LCR display.
Adjust “APAO” potentiometer A14R15 for .000 count on 4262A DQ display.
Connect a 1000pF capacitor in place of the 10nF capacitor as DUT.
Adjust “ZOF” potentiometer A14R1 fOI:.OOO count on 4262A DQ display.
Connect a 10nF capacitor with 10k parallel resistance (D 221.59) in place of the
1000pF capacitor.
Adjust “APAO” potentiometer A14R15 for the calibrated D value of DUT 2
counts on 4262A DQ display.