TM 11-6625-524-14-4
GENERAL SUPPORT TESTING PROCEDURES
GENERAL
These testing procedures are used to determine the acceptability of repaired
equipment. These testing procedures set forth specific requirements that the re-
paired equipment must meet before it is returned to the using organization.
Perform the testing procedure steps in sequence, do not vary. All tests to be done
w i t h the voltmeter out of its cabinet.
TEST EQUIPMENT REQUIRED
T h e test equipment required for general support testing is listed below:
Manufacturer and model number*
Item
Name
Hewlett-Packard 200CD
A1
Hewlett-Packard 400EL
AC voltmeter
A2
Tektronix 503
A3
Millivac 864A
DC multimeter
A4
A5
Variable
Superior Electric power stat 116
* Equivalent items may be used.
POWER SUPPLY TEST
a.
Test equipment.
(1) AC voltmeter
(2) Oscilloscope
(3) DC multimeter
(4) Variable transformer
b.
Test connections: C o n n e c t the voltmeter (U.U.T.) to the variable transformer
which is connected to a 115-volt, 60Hz source.
Procedure.
c.
( 1 ) Set the voltmeter (U.U.T.) to the 3 VOLT full scale range position.
(2) Using the AC voltmeter, measure the voltage and adjust the variable
t r a n s f o r m e r ' s output for 115-volt.
(3) On the U. U. T., turn POWER switch to ON.
( 4 ) Connect the DC multimeter, set to -30V DC, between power supply
board terminals 2TP1 and 2TP2 (2TP2 is the negative side).
( 5 ) M e a s u r e -13.5V to -15.5V. If not, adjust power supply board control
(2R13) until a reading of -14.5V occurs.
( 6 ) Disconnect the DC multimeter, reset to -10V DC and reconnect between
2TP1 and chassis (chassis is the negative side).
( 7 ) M e a s u r e -5.4V to -6.6V.
(8) Disconnect the DC multimeter, reset to +10V DC and reconnect between
2TP2 and chassis (chassis is the negative side).
