TB 9-6695-293-50
(6) Return to +10.0 A dc output. Verify that the ac measurement standard Error
display returns to a zero reading .0010 PCT within 1 to 3 minutes; if not, set a new
reference on ac measurement standard by pressing CLEAR REF. INPUT 1 soft key, then
press SET REF soft key. Repeat (5) above.
(7) Algebraically add the ac measurement standard Error indication recorded in 5
above to the test reported ac-to-dc difference of the ac shunt. The result will be within the
limits specified; if not, perform b. below.
(8) Repeat technique of (5) and (6) above for remaining frequencies listed in table
15. At each frequency record the ac measurement standard Error indication.
Algebraically add the resulting error indication to the associated test reported ac-to-dc
difference of the ac shunt. The result will be within the limits specified; if not, perform b
below.
Ac measurement
Ac shunt
Calculated
Error
Test instrument output
standard
ac-dc
error
limits
Current
Frequency
Error display
difference
( %)
( %)
10.0 A
1.0
kHz
0.16
10.0 A
20
Hz
0.16
10.0 A
5
kHz
0.17
b. Adjustments
(1) Set TI to STANDBY; then set TI for a 10 A, 1 kHz output.
(2) Allow 3 minutes for stabilization; set a new reference on ac measurement
standard by pressing CLEAR REF. INPUT 1 soft key, then press SET REF soft key.
(3) Change TI output frequency to 5 kHz; wait 1 minute, then adjust C4 on A5
standard. (R)
a. Deenergize and disconnect all.equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.