TB 9-4931-383-50
(6) If null detector indication is not within 10 microvolts of value recorded in (4)
above, perform b(1) and (2) below.
(7) Repeat the technique of (1) through (6) above using settings, indications, and
Table 7. Linearity
Maximum
Voltage
VOLTAGE
Test Instrument
Difference
Adjustments
Divider
Dc Transfer
RANGE
Switch Setting
Allowed 1
Initial
Standard
Voltage Dials
Step (5)
Settings.
Output.
Step (3)(B)
(V).
1000
001X.000
002.0000
.5000000
1-volt mean
1
C2 (R)
1000
003.X000
004.0000
.2500000
1-volt mean
1
C4 (R)
1000
007.X000
008.0000
.1250000
1-volt mean
1
C8 (R)
1000
00X.0000
010.0000
.1000000
1-volt mean
1
B1 (R)
100
01.X0000
02.00000
.5000000
1-volt mean
1
B2 (R)
100
03.X0000
04.00000
.2500000
1-volt mean
1
B4 (R)
100
07.X0000
08.00000
.1250000
1-volt mean
1
B8 (R)
100
0X.00000
10.00000
.1000000
1-volt mean
1
A1 (R)
10
1.X00000
2.000000
.5000000
1-volt mean
1
A2 (R)
10
3.X00000
4.000000
.2500000
1-volt mean
1
A4 (R)
10
7.X00000
8.000000
.1250000
1-volt mean
1
A8 (R)
1If
difference exceeds this value, perform adjustment.
2Report
adjustments only if difference is greater than 30 microvolts.
(8) Set POWER switch to STDBY/RESET.
b. Adjustments
WARNING
Potential exist between chassis and ground. Exercise extreme
caution.
(1) Adjust DECK C adjustment 1 (fig. 6) for same indication on null detector (R).
(Report only if (difference is greater than 100 microvolts.)
(2) Report a above until no further adjustments are required.
19. Output Accuracy and Tracking
a. Performance Check
(1) Set voltage divider (A7) to one-tenth of actual value of dc transfer standard (A2)
(2) Set dc transfer standard for 1.018 + ∆E, mean output and set ∆E dials to last
three digits of standard cell value.
(3) Position TI controls as listed in (a) through (c) below:
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