TB 9-4920-464-24
e. Position the SIMULATED TORQUE ADJUST knob to set V01 = 2.275 0.005 V
DC on TI DC VOLTMETER and wait for display to stabilize.
f. Turn TI FUNCTION SELECTOR switch to EXT. J-BOX SIGNATURE. Wait for
g. Record VCD (R1) and VEF (R2). Verify that both readings are between 18 and 22 V AC.
VEF (R2) =_________V AC
VCD (R1) =_________V AC
h. Calculate the ratio using the following formula.
(VCD VEF)
Ratio:____________
(VCD+VEF)
i. Verify that the ratio is between 0.00274 and 0.00286. If ratio is not within tolerance
adjust R2 (Balance) up to turn CW if ratio is high or CCW if ratio is low and repeat
paragraph 14 steps a through i above until proper ratio is obtained (R).
j. Turn TI
FUNCTION
SELECTOR
INTERNAL
J-BOX
REF.
switch
to
SIGNATURE.
k. Position the SIMULATED TORQUE ADJUST knob to set V01 = 5.370 0.005 V
DC on TI DC VOLTMETER and wait for display to stabilize.
l. Turn TI FUNCTION SELECTOR switch to EXT. J-BOX SIGNATURE. Wait for
m. Record VCD (R1) and VEF (R2). Verify that both readings are between 18 and 22 V AC.
VEF (R2) =_________V AC
VCD (R1) =_________V AC
n. Calculate the ratio using the following formula.
Ratio:____________
o. Verify that the ratio is between 0.01223 and 0.01247. If ratio is not within
tolerance, adjust R4 (Span) up to one half turn and repeat paragraph 14 steps j through n
above until proper ratio is obtained. (R)
p. If adjustments were made in steps a through o above, repeat those steps until no
further adjustments are required.
q. Repeat paragraphs 12 and 13 until no further adjustments are necessary.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.