TB 9-4931-383-50
16. Zero Voltage
a. Performance Check
(1) Set dc transfer standard (A2) for (supply number 1) ∆E output and set ∆E
control to 000.
(2) Position TI controls as listed in (a) through (c) below:
(a) VOLTAGE RANGE switch to 1000.
(b) Voltage dials to 0000000.
(c) POWER switch to OPR.
(3) Adjust ∆E control of dc transfer standard for a null indication on null detector
(A4).
(4) If ∆E control of dc transfer standard does not indicate 040 microvolts, perform
b(1) below.
NOTE
If reading is negative, reverse leads at OUTPUT of dc transfer
standard.
(5) Set VOLTAGE RANGE switch to 100.
(6) Repeat (3) above.
(7) If ∆E control of dc transfer standard does not indicate 0 20 microvolts, perform
b(2) below.
(8) Set VOLTAGE RANGE switch to 10.
(9) Repeat (3) above.
(10) If ∆E control of dc transfer standard does not indicate 0 10 microvolts, perform
b(3) below.
(11) Set POWER switch to STDBY/RESET.
b. Adjustments
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