TB 9-4931-700-50
Test Instrument
Voltage
Acceptable
Decade resistor
Output
Error (Percent)
Setting (Ohms)
Adjustments
Frequency
(V)
(Step a(6))
(Step a(8))
0.22%
10 Hz
1
22
0.035%
100 Hz
1
22
If an out-of-tolerance condition is
indicated for any
0.035%
10 kHz
1
22
10b(1)
0.035%
20 kHz
1
22
through (3) below and repeat all checks
on 1 V
0.072%
50 kHz
1
22
range.
0.072%
100 kHz
1
22
0.22%
10 Hz
101
221
0.034%
100 Hz
10
221
0.034%
1 kHz
10
221
If an out-of-tolerance condition is
indicated for any
0.034%
10 kHz
10
221
10b(1),
0.034%
20 kHz
10
221
(2), and (4) below and repeat all checks
on 10 V
0.068%
50 kHz
10
221
range.
0.068%
100 kHz
10
221
0.22%
10 Hz
1001
22002
If an out-of-tolerance condition is
indicated for 10
0.034%
100 Hz
100
2200
Hz, or 1 kHz on the 100 V range,
perform
0.034%
1 kHz
100
2200
10b(2), (5), and (6) below and repeat all
previous checks on 100 V range.
0.034%
10 kHz
100
2200
0.034%
20 kHz
100
2200
If an out-of-tolerance condition is
indicated for 10,
0.067%
50 kHz
100
2200
20, 50, or 100 kHz on the 100 V range,
perform
0.067%
100 kHz
100
2200
10b(2), (5), and (7) below , and repeat
all checks on 100 V range.
1Repeat
technique of (7) above.
2Replace decade resistor (A3) with load (A6) for remaining checks.
(14) Set thermal transfer standard to ac balancing state. Adjust TI voltage
controls to obtain null indication on thermal transfer standard meter with its null X5
pushbutton pressed.. Record TI voltage control indication.
(15) Repeat (13) and (14) above twice. Average the three voltage control
indications. If average indication is 1.0 or more, subtract 1.0 from it and assign a -
(minus) sign. If it is less than 1.0, subtract it from 1.0 and assign a + (plus) sign. Record
value.
(16) Refer to test report for thermal transfer standard to obtain percentage of
ac/dc difference for 1 V at 1 kHz. Convert percentage to voltage error, retaining sign.
Record value.
16