TM 9-4910-663-34
(5)
Set circuit breaker switch (CB1) to the OFF position.
e.
Polarity Reversing Circuit (fig 2-5).
(1)
Set all test stand controls to the preliminary settings listed in table 2-2.
(2)
Set circuit breaker switch (CB1) to the ON position.
(3)
Set POLARITY REVERSING switch (S7) to the POS GND position.
(4)
Using an ohmmeter, verify that continuity exists between the GENERATOR G+ binding post (fig 2-6) and
the ground terminal post.
(5)
Set POLARITY REVERSING switch (S7) to the NEG GND position.
(6)
Using an ohmmeter, verify that continuity exists between the GENERATOR G-binding post and the ground
terminal post.
(7)
Set circuit breaker switch (CB1) to the OFF position.
f.
Load Bank Circuits.
(1)
Set all test stand controls to the preliminary settings listed in table 2-2.
(2)
Set DC AMMETER LOAD & STARTER OUTPUT CURRENT BATTERY CHARGE CURRENT RANGE
switch (S14, fig 2-4) to the LOAD X1 position.
(3)
Set circuit breaker switch (CB1) to the ON position.
(4)
Set MASTER LOAD DISCONNECT switch (S8, fig 2-5) and LOAD SELECTION 0-25 AMPS/0-12.5 AMPS
switch (S24) to the ON position.
(5)
Using an ohmmeter, verify that the resistance between the REGULATOR B+ and REGULATOR B-binding
posts (fig 2-6) is adjustable over the range of 1.14 ±0.06 ohms to 46.1 ±2.3 ohms by means of VARIABLE LOAD control
(R32).
(6)
Set LOAD SELECTION 0-25 AMPS/0-12.5 AMPS switch (S24) to the OFF position. Set LOAD
SELECTION 25 AMPS/12.5 AMPS switch (S23) to the ON position. Using an ohmmeter, verify that the resistance
between the REGULATOR B+ and REGULATOR B-binding posts is 1.14 ± 0.06 ohms.
(7)
Set LOAD SELECTION 25 AMPS/12.5 AMPS switch (S23) to the OFF position. Set DC AMMETER LOAD
& STARTER OUTPUT CURRENT BATTERY CHARGE CURRENT RANGE switch (S14) to the LOAD X3 position. Set
LOAD SELECTION 50 AMPs/25 switch (S22) to the ON position. Using an ohmmeter, verify that the resistance between
the REGULATOR B+ and REGULATOR B-binding posts is 0.57 +0.03 ohm.
5-3
