TM 11-6625-291-14/TO 33A1-7-23-1
6-24. ALINEMENT OF METER CALIBRATION CIRCUIT (TS-585D/U ONLY). (CONT)
ACTION
REMARKS
ITEM
LOCATION
ALINEMENT (CONT)
6. Terminal board TB1
Adjust decade resistor to 4,825 ohms.
Decade resistor (1),
Terminal board AT1
OUT terminal lead (2),
Connect one lead of decade resistor to OUT
and OUT terminal (3)
terminal lead. Connect other lead of decade
resistor to OUT terminal.
7. Terminal board TB1
Meter test set (4) and
Adjust meter test set to 5 vat. Connect
meter test set across decade resistor.
decade resistor (1)
8. Terminal board TB1;
Readjust meter test set until meter shows
Meter test set (4)
chassis, front
and meter (5)
full-scale reading.
NOTE
Readjust meter test set, when necessary, to maintain meter at
full-scale reading.
9. Terminal board TB1
Voltmeter ground
Connect voltmeter ground lead to OUT terminal
lead,
lead (6) and OUT
terminal lead (2)
10.
Test point 1 (7),
By trial and error procedure, vary the re-
test point 2 (8)
sistance of decade resistor from 4875 to
4775 ohms and select a resistor R2 (from
and voltmeter test
lead (9)
table below) that will result in equal
voltage readings at test point 1 and test
point 2 using voltmeter test lead.
Resistor Value (ohms)
National Stock Number (NSN)
330
390
470
560
680
820
6-44
