TB 9-4931-217-40
41. 10,000 Ohm Decade Linearization
a. Performance Check
(1) Set MULTIPLIER switch to 1 X STANDARD and resistance decade dials to
00(TEN)000.01(00).
(2) Adjust resistance standard no. 1 to 10 k .
(3) Set DETECTOR RANGE switch to 3 MICROVOLTS and adjust DETECTOR
ZERO control for a null indication on TI meter.
(4) Set DETECTOR RANGE switch to 1000 MICROVOLTS and GENERATOR
OUTPUT +/OFF/- switch to + (positive).
(5) Adjust resistance standard no. 1 for a null indication on TI meter while
decreasing DETECTOR RANGE switch to 30 MICROVOLTS.
NOTE
If null indication cannot be obtained using resistance standard,
adjust DEVIATION dial to complete null indication.
(6) Position controls as listed in (a) through (e) below:
(a) GENERATOR OUTPUT +/OFF/- switch to OFF.
(b) DETECTOR RANGE switch to 1000 MICROVOLTS.
(c) 10k ohms resistance decade dial to 1.
(d) 1k ohms resistance decade dial to 0 (zero).
(e) GENERATOR OUTPUT +/OFF/- switch to + (positive).
(7) Decrease DETECTOR RANGE switch setting until 30 MICROVOLTS range
is reached or until a full-scale indication is obtained on TI meter. If TI meter does not
indicate null on 30 MICROVOLTS range, perform b below.
(8) Set GENERATOR OUTPUT +/OFF/- switch to OFF and DEVIATION dial to X0.
(9) Repeat (3) through (8) above, using resistance standard no. 1 and resistance
decade dial settings listed in table 15. If TI meter does not indicate null on 30
MICROVOLTS range, perform appropriate adjustment listed in table 15.
Table 15. 10,000 Ohm Decade Linearization
Test instrument
Resistance decade dial settings1
Resistance standard
Adjustments (behind lower
nominal resistance
(ohms)
calibration trimmers
(k )
Step
10k
1k
cover)
1
20
1
TEN
---
2
---
2
0
10K - 2 (R)
3
30
2
TEN
---
4
---
3
0
10K - 3 (R)
5
40
3
TEN
---
6
---
4
0
10K - 4 (R)
7
50
4
TEN
---
See note at end of table.
