TM 11-6625-444-14-1
--
MATERIEL
USED
IN
CONJUNCTION
WITH
AN/
GSM-64B
--
Section 1.
INTRODUCTION TO PL-1370 / GSM-64B
7-1. Scope
Ac + dc
Dc
(0.1% of input + 0.03%
of
This chapter describes the installation, operation,
range ),
functioning, and maintenance of Plug-In, Elec-
50 Hz to 10k Hz
(0.1% of input + 0.03%
of
tronic Test Equipment PL-1370/GSM-64B (ac
range).
converter) (fig. 7-3). Instructions are provided for
10 to 30 kHz
(0.2% of input + 0.06%
of
installation
and
range).
operation,
trouble-shooting,
30 to 50 kHz
(0.3% of input + 0.12%
of
testing, and repair of the equipment, as well as
range),
replacement of maintenance parts.
20 to 50 Hz
(0.5% of input + 0.03%
of
range).
7-2. Purpose and Use
10 to 20 Hz
(1.0% of input + 0.06%
of
The PL-1370/GSM-64B is a true rms ac to dc
range).
converter used with Voltmeter, Digital AN/GSM-
50 to 100 kHz
(1.0% of input + 0.3%
of
64B The ac converter adds rms voltage measuring
range).
100 to 300 kHz
capabilities to the voltmeter. Equipped with the ac
(2.0% of input + 0.5%
of
range),
converter, t h e AN/GSM-64B is capable of
measuring rms voltages from 0 to 1,100 volts ac.
Aconly
Capacitive input coupling, or direct input coupling,
50 Hz to 10 kHz
(0.1% of input + 0.012% of
to the ac converter can be selected by the operator.
range).
10 to 30 kHz
This provides the capability of measuring ac
(0.2% of input + 0.04% of
range).
signals exclusive of any dc components or com-
30 to 50 kHz
(0.3% of input + 0.1% of
posite ac-dc signals.
range),
20 to 50 Hz
7-3. Description
(0.5% of input + 0.012% of
range).
The PL-1370/GSM-64B is a plug-in printed circuit
10 to 20 Hz
(1.0% of input + 0.04% of
board assembly. This assembly, on initial receipt,
range).
is installed in Voltmeter, Digital AN/GSM-64B.
50 to 100 kHz
(1.07% of input + 0.3% of
range).
The voltmeter contains an existing prewired
100 to 300 kHz
(2.0% of input + 0.5% of
receptacle for the ac converter assembly.
range).
Temperature coefficients (0 C to
18 C and 28 C to 50 C):
Performance data for the PL-1370/GSM-64B is
Dc and 10 HZ to 10 kHz
listed below:
(0.004% of input + 0.004% of
(ac+dc).
range).
Ranges
1,10,100,1,000vac.
10 Hz to 10 kHz (ac only)
(0.04% of input + 0.001% of
Overrange
2 0 percent, 1 , 1 0 0 volts rms
range).
maximum on 1,1000-volt range.
Input impedance
1 megohm, shunted by less than
Resolution
0.001-percent range.
150pf
Overload
1,100 volts rms any range (1,500
Noise rejection (common mode
volt peak ac).
(with up to 100-ohm unbalance
Superimposed dc (ac only) 1,100 volts dc (peak ac plus dc
in either lead):
may not exceed 1,500 volts).
Dc to 60 Hz
Greater than 120 db.
Maximum crest factor
7 at full scale and increasing
R e s p o n s e time (to a reading
down scale per:
within 0.1 percent of range
when measuring step change.
inputs a n d u s i n g e x t e r n a l
Accuracy, 90 days (18 C
trigger. For readings less than
(64.4F) to 28 C (82.4 F))
10 percent of range. double
(0.001 volts to 1,100 volts):
indicated times.)
Change 1 7-1
