TB 9-4931-700-50
(3) Measure TI output, using thermal transfer standard in auto mode. Wait
approximately 2 minutes after applying ac voltage before transferring to the dc output
(4) Compute and record difference between indication recorded in (3) above and
TI voltage controls setting. If indication in (3) is larger, a + (plus) sign is to difference. If
it is smaller, a - (minus) sign is assigned to difference. Convert difference to percentage
retaining assigned sign.
(5) Refer to test report for thermal transfer standard to obtain percentage of
ac/dc difference for 100 V at appropriate frequency.
(6) Add algebraically two percentages obtained in (4) and (5) above. The result is
percentage of TI output error. If TI output error is more than 0.04 percent, perform b
below.
(7) Repeat technique of (2) through (6) above with autotransformer set at 105 and
125 V ac. If error does not remain within 0.04 percent and adjustments were not
performed in (6) above, perform b below and repeat (2) through (6) above. Return
(8) Repeat technique of (7) above with voltage controls set to obtain an indication
of 1000.000 V.
(9) Perform technique of (3) through (6) above, using frequencies and acceptable
Table 8. Accuracy and Frequency Response
Test Instrument Frequency
Acceptable Error (Percent)
0.04
50 Hz
0.04
100 Hz
0.04
10 kHz
0.04
20 kHz
0.08
50 kHz
0.15
100 kHz
(10) Press OUTPUT OFF pushbutton.
(11) Connect variable capacitor (A10) across TI output (connect to adapter B4
using both conductors of a pair for each connection, hook-up wire B9). Set variable
capacitor dial to 125 pF (picofarad).
(12) Set voltage controls to obtain an indication of 700.000 V and press OUTPUT
ON pushbutton.
(13) Repeat (9) above.
(14) Press OUTPUT OFF pushbutton.
(15) Replace variable capacitor with decade resistor (A3). Set variable resistor
dials to 16000 ohms.
(16) Set voltage controls to obtain an indication of 100.000 V.
(17) Press FREQUENCY( RANGE )(10 pushbutton and adjust FREQUENCY
control to obtain FREQ SCALE indication of 1.0.
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