TB 9-4931-495-24
b. Adjustments
(1) Adjust V A2R43 (fig. 1) for 0.000 V dc on multimeter (model 8620C only) (R).
(2) Adjust T A2R33 (fig. 1) for 10.000 V dc on multimeter (model 8620C only) (R).
magnitude, but of opposite polarity (R).
Start/Stop (Model 8620A)
a. Performance Check
(1) Connect multimeter to A2TP5 and A2 GND (fig. 2). Press START pushbutton.
(2) Set START pointer to end of frequency scale (+10 V) and set STOP pointer to
low end of scale (0 V).
(3) Set MODE switch to MANUAL and turn MANUAL control fully ccw.
If
multimeter does not indicate between +9.995 and +10.005 V dc, perform b (1) below.
(4) Adjust MANUAL control fully cw. If multimeter does not indicate between
-0.005 and +0.005 V dc, perform b (2) below.
(5) Set STOP pointer to high end of frequency scale (10 V). If multimeter does not
indicate between +9.995 and +10.005 V dc, perform b (3) below.
(6) Adjust START pointer from high to low end of frequency scale. If indication on
multimeter changes more than 10 mV dc, repeat paragraph 15 above.
b. Adjustments
(1) Adjust A2R7 (fig. 2) for 10.000 V dc on multimeter (R).
(2) Adjust A2R2 (fig, 2) for 0.000 V dc on multimeter (R).
(3) Adjust A2R16 (fig. 2) for 10.000 V dc on multimeter (R).
ĆF Operations (Model 8620C)
a.
Performance Check
(1) Connect multimeter to A2TP5 and A4 GND (fig. 3).
(2) Adjust CW and CW VERNIER controls for a +5.000 0.001 V dc indication
on multimeter.
(3) Set ĆF pointer to the 0-V mark on calibration scale and set ĆF multiplier to X10.
(4) Move positive lead to A2TP3 (fig. 3). Press ĆF pushbutton and adjust
MANUAL control for multimeter indication between +4.995 and +5.005 V dc.
(5) Move positive lead to A2TP6 (fig. 3). If multimeter does not indicate between
-0.001 and +0.001 V dc, perform b (1) below.