to the "BAT VOLTS" position to de-
ternator) is nondirectional, therefore, the
t e r m i n e whether the battery voltage
rotation of the varidrive assembly can be in
o f the test stand is the same as the
either direction without loss of the generator
voltage of the system under test. Cor-
rect voltage is 24 volts, or above which
d. Test Procedures.
(1) Connect the dc variable volts positive
( 4 ) . Place the battery on-off switch
( r e d ) and negative (black) binding
(22) in the "OFF" position. If the
posts to the "D" and "F" (some stands
reading is less than 24 volts recharge
are marked "E" instead of "F") bind-
batteries (par. 98). After the bat-
t e r i e s are charged, place the battery
ing posts (12, fig. 15) as shown in fig-
on-off switch (22) in the "ON" posi-
74).
c i r c u i t selector switch (10) to the
(2) The position of the switches and con-
"RECT GEN" position. It is also ad-
trols pertinent to this test are listed in
v i s a b l e to check the batteries with a
hydrometer for specific gravity (refer
items in the positions indicated in col-
t o TM 9-6140-200-15).
of the table before tests are
umn
Note. The safety clip (25-B) must be off
started.
the stop button (25-C) to perform the bat-
(3) P l a c e the battery on-off switch (22)
tery check in (3) above. Do not push the
in the "ON" position and turn the dc
start button (25-A) as the varidrive assem-
bly need not be running for this test.
Table 7. Position of
Switches and Controls Before
and After Generator
(alternator) Performance Test and
Generator (alternator) Regulator Test (Leece Neville Company)
(3)
(2)
(1)
Position
Figure No. 47
Item
(b)
(a)
After
Before
Key No.
500 (X10)
7
150A (X3)
Load dc ammeter range selector switch . . . . . . . . . . . . . . . . . . . . . . .
30A (X6)
8
15A (X3)
Field dc ammeter range selector switch . . . . . . . . . . . . . . . . . . . .
50V (X5)
50V (X5)
9
Dc voltmeter range selector switch . . . . . . . . . . . . . . . . . . . . . . . . . .
400A (X4)
12
100A (X1)
Ac ammeter range selector switch . . . . . . .
50V (X2)
50V (X2)
13
Ac voltmeter range selector switch . . . . . . . .
CENTER (OFF)
AC/DC
16
Field ammeter dc ac/dc switch . . . . . . . . .
ANY
10
RECT GEN
Dc voltmeter circuit selector switch . . . . . . . . . . . . . . . .
OFF
22
OFF
Battery on-off switch . . . . . . . . . . . . . . . . . .
24V
23
24V
Battery circuit selector switch . . . . . . . . . . . . . . . . .
CENTER (OFF)
27
NEG GND
Polarity reversing switch . . . . . . . . . . . .
CENTER (OFF)
INT GND
20
Generator field external-internal ground switch . . . .
OFF
15
ON
Starter test load disconnect switch . . . . . . . . . . . . . . . . . . . . . . . . . . .
OFF
17-A, B,
OFF
Load switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C, and D
OFF
18
ON
Variable volts on-off switch . . . . . . . . . . . . . . . . . . . . .
CENTER (OFF)
21
CENTER (OFF)
40-ohm 30-ampere maximum rheo-reg switch . . . . . . . . . . . . . . . . . . . . . . . .
Fully counter-
Fully counter-
26
Dc variable power supply control . . . . . . . . . . . . . . . . . . . .
clockwise
clockwise
STOP (button
25-C
STOP (button
Drive
control
stop
button
.
.
.
.
.
.
.
.
.
.
.
.
depressed)
depressed)
One-quarter speed
One-quarter speed
24
Speed control handle
counter-
counter-
clockwise
clockwise
Fully counter-
19
Fully counter-
Variable load 0-25 0-12.5 ampere rheostat . . . . . . . . . . . . . . . . . . .
clockwise
clockwise