TB 9-4931-495-24
(5) Set STOP MARKER pointer to the 0-V mark on calibration scale and turn
MANUAL control fully cw. If multimeter does not indicate between -0.005 and +0.005 V
dc, perform b (3) below.
(6) Set STOP MARKER pointer to the 10-V mark on calibration scale.
If
multimeter does not indicate between +9.995 and +10.005 V dc, perform b (4) below.
b. Adjustments
(1) Adjust F A2R55 (fig. 1) for 0.000 V dc on multimeter (R).
(2) Adjust M A2R26 (fig. 1) for 10.000 V dc on multimeter (R).
(3) Adjust L A2R25 (fig. 1) for 0.000 V dc on multimeter (R).
(4) Adjust R A2R36 (fig. 1) for 10.000 V dc on multimeter (R).
a. Performance Check
NOTE
Steps (1), (2), and (3) pertain to model 8620C only.
(1) Connect multimeter to A2TP4 and A4 GND (fig. 3).
(2) Set CW MARKER pointer to the 0-V mark on calibration scale and press
FULL SWEEP pushbutton. If multimeter does not indicate between -0.001 and +0.001 V
dc, perform b (1) below.
(3) Set CW MARKER pointer to the 10-V mark on calibration scale. If multimeter
does not indicate between +9.995 and +10.005 V dc, perform b (2) below.
(4) Set CW MARKER pointer to the 0-V mark on the calibration scale, and press
CW pushbutton.
(5) For model 8620A, connect multimeter between A2TP5 and A2 GND (fig. 2) and
for model 8620C, between A2TP5 and A4 GND (fig. 3). If multimeter does not indicate
between -0.001 and +0.001 V dc, perform b (3) below.
(6) Set CW MARKER pointer to the 10-V mark on calibration scale. If multimeter
does not indicate between +9.995 and +10.005 V dc, perform b (4) below.
(7) Set CW MARKER pointer for a multimeter indication of 0 0.001 V dc.
(8) Set CW VERNIER pointer to the +5-V mark on calibration scale, and CW
VERNIER multiplier to X1.
(9) Press CW VERNIER pushbutton.
Multimeter will indicate between +0.497
and +0.507 V dc. Record indication.
(10) Set CW VERNIER pointer to the -5-V mark on calibration scale. If multimeter
does not indicate within 0.002 V of indication recorded in (9) above, but of opposite polarity,
perform b (5) below.
(11) Reset CW VERNIER pointer to the 0-V mark on calibration scale.
If
multimeter does not indicate between -0.01 and +0.01 V dc, recheck (9) and (10) above.