Note. The key numbers shown below in
parentheses in
paragraphs 11 through 75 in
this section refer to
Section Il.
CONTROLS, INSTRUMENTS, AND RELATED ITEMS
14. Dc Volts-Millivolts Meter
The dc volts-millivolts meter (4), located in
This section describes, locates, illustrates,
the center of the meter panel, is a 9-0-9 dc
and furnishes the operator with sufficient in-
volts and 900-0-900 dc millivolts off-center-
formation pertaining to the various controls,
instruments, and related items provided for the
zero, one-scale meter. The scale can be con-
verted to register 0-9 dc volts and 0-900 dc
proper operation of the test stand.
millivolts through the setting of a selector
The load dc ammeter (1), located on the left
hand end of the meter panel, is a 15-0-50 dc
ampere off-center-zero, one-scale meter. The
scale can be converted to register 0-50, 0-150
and 0-500 dc ampere through the settings of a
selector switch (par. 25).
hand center of the meter panel, is a 0-10 dc
volts one-scale meter. The scale can be con-
verted to register 0-10, 0-20 and 0-50 dc volts
through the settings of a selector switch (par.
The field dc ammeter (2), located near the
left hand end of the meter panel, is a 5-0-5 dc
ampere off-center-zero, one scale meter. The
scale can be converted to register 0-5-0-15, and
0-30 dc amperes through the settings of a se-
The ac ammeter (6), located near the right
as TACHOMETER INDICATOR)
hand end of the meter panel, is a 0-100 ac am-
peres one-scale meter with a basic movement
near the left hand center of the meter panel, is
on the scale of 0-5 ac amperes. The scale can
a two-scale meter used to indicate the driving
be converted to register 0-100 and 0-400 ac
amperes through the settings of a selector
tested. The scales on the meter are 0-12 and
0-5.5 and are multiplied by 1000 to determine
the ac amperes output of ac/dc systems, and
also to determine balanced phase conditions of
the correct revolutions per minute meter read-
ing. The scale used is determined by the driving
ac/dc systems through the settings of a selector
head (4 or 5, fig. 7) on which the generator or
to compensate for the variation between gen-
The ac voltmeter (7), located on the right
erator speed and varidrive speed through the
hand end of the meter panel, is a 0-25 ac volts
settings of two switches and a potentiometer
one-scale meter. The scale can be converted to
(pars. 28, 29, and 67).