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Page Title:
Items Comprising an Operable Equipment |
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  TM 11-6625-2616-14
Automatic or manual
Ranging . . . . . . .
Temperature
Automatic
Polarity . . . . . . . . .
± 0.0007% of reading per de-
coefficient
± 0.005% of reading or ± 1
gree C.
Accuracy . . . . . . . .
digit
Normal-mode-
Greater than 60 db at 60 Hz
rejection
Reference input
Common-mode-
impedance. . . . . .
Greater than 50K ohms
Greater than 120 db at 60 Hz,
rejection
Signal input
and greater than 140 db at dc
Greater than 10 megohms
impedance. . . . . .
with 1,000 ohms unbalance in
Temperature
either lead
±0.0007% of reading per de-
coefficient . . . . .
gree C.
Dc voltage ratio measurements:
Less than 2 seconds
Balancing time . . . . . .
±1 volt to ±10 volts reference
Ranges:
Isolation - chassis
input
ground to signal
000.000 to ± 119.999%
Greater than ±200 volts de
low . . . . . . . . . . . . . . .
0000.00 to ±119.999%.
Input power . . . . . . . . .
Selectable - 115/230 vac ( ± 10),
00000.0 to ± 11999.9%
50-60 Hz, single phase
±10 volts to ±100 volts refer-
Less than 20 watts
Power consumption . .
ence input
8½ in. wide × 3½ in. high ×
Dimensions . . . . . . . . . .
00.0000 to ± 11.9999%
..........
15 in. deep
000.000 to ± 119.000%
...........
Weight . . . . . . . . . . ..
Less than 15 lbs
0000.00 to *1199.99%
..........
Qty furn
Unit of
Qty in
Federal
Fig. No.
each unit
eqpmt
measurement
Description
stock No.
1-1
1
1
each
Voltmeter, Digital AN/GSM-64A . . . . .
6625-165-5779
1-1
1
1
each
Technical Manual TM 11-6625-1626-14
1-1
each
1
1
Lead, test: 3465; 03626 . . . . . . . . . . . . . .
1-1
each
1
1
Lead test: 34-66; 03626 . . . . . . . . . . . . . .
1-1
each
1
1
Voltmeter, Digital ME-218A/GSM-64A
6625450-0964
c. The voltmeter is portable, weighing less
1-7. Description of Equipment
than 15 pounds. A carrying handle is provided
a. The AN/GSM-64A Digital Voltmeter is a
which also serves as a tilt-stand for the unit.
solid-state digital measuring instrument with 5
By removal of the top and bottom covers of the
full digits and a sixth digit which provides a 20
instrument, internal calibration and adjustment
percent over-range capability, except in the
controls are easily reached and clearly labeled.
1, 000-volt range. Polarity of signal input is dis-
Power application and function and range selec-
played automatically and range changing may
tion are accomplished by activation of pushbut-
be either automatic, or manually controlled as
ton switches on the front panel. Signal input
selected by front-panel switches.
binding posts, located on the front and rear of
the instrument, will accept standard test leads
b. In operation, the unknown input voltage
or leads equipped with banana plugs. A power-
applied to the instrument is buffered and used
selection switch is located on the rear of the
to charge a capacitor during a specific time in-
instrument for rapid conversion to either 115-
terval. An internal reference is then applied to
volt or 230-volt power sources. The powerline
discharge the capacitor. Measuring the time in-
cord is permanently attached to the rear of
terval required to discharge the capacitor indi-
the unit and terminates in a three-pin polarized
cates the unknown input which is visually dis-
plug. The powerline fuse is externally located
played in neon glow tubes at the front of the
in an extractor post on the rear of the instru-
ment.
instrument.
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