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T .O . 33K8-4-551-I
4 .1 .3 On the Null Detector, set the OPR/ZERO switch to ZERO and adjust for zero on the 3 1.1V range. Set the Null
Detector 0PR/ZERO switch to OPR.
4 .1 .4 Set the Tl to the first range listed in the Range column of Table 3.
4 .1 .5 Set the Null Detector Range switch to the 30 V position.
4 .1 .6 Set the Calibrator for the first value listed in the Applied column of Table 3.
4 .1 .7 Set the DC Reference Divider MODE switch to the first position listed in the DC Ref Div column of
Table 3.
4 .1 .8 Set the Calibrator OPR/STBY switch to OPR.
4 .1 .9 Adjust the Calibrator Edit controls to obtain a null while increasing the sensitivity of the Null Detector to
maximum with less than full scale deflection.
4 .1 .10 Set the Null Detector Range switch to the 1000 V position.
4 .1 .11 Divide or multiply the DC Reference Standard Certified Value by the factor listed in the Factor column of
Table 3.
4 .1 .12 The Tl must indicate the value obtained in step 4 .1 .11 ± the values listed in the corresponding Limits column of
Table 3.
4 .1 .13 Set the Calibrator OPR/STBY switch to STBY.
4 .1 .14 Repeat steps 4 .1 .4 through 4.1 .13 for each remaining range, applied and DC Reference Divider value listed in
Table 3 .
Table 3.
Range (VDC) Applied (VDC) DC Ref Div (VDC)
Factor
Limits (VDC)
Standard
Opt 002
100 m
0.1
0 .1
4-
100
±0 .00191 m
±0 .00152 m
10
10
10
X 1
±0.000083
±0 .000045
100
100
100
X 10
±0 .00104
±0 .00065
1000
1000
1000
X 100
±0 .0222
±0 .0183
4 .1 .15 Disconnect the Calibrator OUTPUT terminals from the Tl HI and LO Input terminals.
4 .1 .16 Connect the DC Reference Standard 10V Output terminals to the DC Voltage Divider INPUT 1 .0 and LOW
terminals . Connect the DC Voltage Divider OUTPUT HIGH and LOW terminals to TI HI and LO Input terminals,
observing polarity.
4 .1 .17 Manually select the TI 10 VDC Range.
4 .1 .18 Set the DC Voltage Divider to the first setting listed in the DC Divider column of Table 4.
20
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