TB 9-4931-290-24
Table 3. Ac Voltage - Continued
Test instrument switch setting
Multimeter indications (V)
Test instrument
OUTPUT
MODE
RANGE switch
adjustments
VOLTAGE
Min
Max
switch
(V)
controls
1 kc RMS
100
11.10
10.945
11.255
---
1 kc RMS
10
TEN.000
9.9845
10.0155
---
1 kc RMS
1
.TEN0.00
0.99845
1.00155
---
b(2)
0.4 kc RMS
100
TEN0.00
99.745
100.255
b(3)
1 kc P-P
100
TEN0.00
35.2952
35.40479
0.4 kc P-P
100
TEN0.00
35.25985
35.44015
---
(5) Position controls as listed in (a) through (c) below:
(a) MODE switch to 1 kc RMS.
(b) RANGE switch to 100 mV.
(c) OUTPUT VOLTAGE controls to TEN0.00.
(6) Multimeter will indicate between 0.0998420 and 0.1001580 mV.
(7) Set RANGE switch to 10 mV and OUTPUT VOLTAGE controls to TEN.000.
(8) If multimeter does not indicate between 0.0099847 and 0.01001553 V,
perform b (4) below.
(9) Set RANGE switch to 1 mV and OUTPUT VOLTAGE controls to .TEN000.
(10) If multimeter does not indicate between 0.0099847 and 0.001001553,
perform b (4) below.
(11) Position controls as listed in (a) through (c) below:
(a) MODE switch to 0.4 kc RMS.
(b) RANGE switch to 100 V.
(c) OUTPUT VOLTAGE controls to TEN0.00.
0.3% 0.4 kc ONLY output jack and GND.
(12) Connect multimeter to TI
(13) Multimeter will indicate between 99.545 and 100.4550 V ac.
(14) Set MODE switch to 0.4 kc P-P. Multimeter will indicate between 35.18915
and 35.510843 V ac.
b. Adjustments
NOTE
Adjustment of R69, R71, or R73 affects the 100 mV (millivolt),
1 V and 10 V ranges as well as the 100 V range. They should
be adjusted for the best overall indication on all ranges.
(1) Adjust R69 1 kc LEVEL (fig. 1 or 2) for 100.0000 V ac (R).
(2) Adjust R71 0.4 kc LEVEL (fig. 1 or 2) for 100.0000 V ac (R).
(3) Adjust R73 P-P LEVEL (fig. 1 or 2) for 35.3500 V ac (R).
(4) Adjust R46 1 & 10 mV AC (fig. 1 or 2) for 0.0100 or 0.0010 V ac depending on
range switch setting (R).
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