Tektronix PS 503A, Инструкция по эксплуатации

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Section 4—PS 503A
MAINTENANCE AND
INTERFACING INFORMATION
PREVENTIVE MAINTENANCE
There are no special preventive maintenance
procedures that apply to the PS 503A. Refer to the power
module instruction manual for general preventive
maintenance procedures and instructions.
CORRECTIVE MAINTENANCE
Refer to the power module instruction manual for
general corrective maintenance procedures and instruc­
tions.
TROUBLESHOOTING
Use the Performance Check, Adjustment Procedure,
and Circuit Description as aids to locate trouble in the
event of equipment failure. The test equipment listed in the
Performance Check and Adjustment Procedures will
prove useful in troubleshooting the PS 503A.
FUNCTIONS AVAILABLE AT REAR
CONNECTOR
Pins are available at the rear connector for routing
signals to and from the PS 503A for specialized
applications (see Fig. 4-1, Input-Output Assignments for
Plug-In Rear Interface Connector). One or more com­
partments of a multi-plug-in power module can be wired
with barriers installed to provide specific functions
between compartments. See power module instruction
manual for additional information.
FUNCTION PROGRAMMING OF REAR
INTERFACE CONNECTOR
Remote
Resistance Program
Remove the jumpers from F - F (+Volts supply) and H -
H (—Volts supply). Install jumpers between E - E (+Volts
supply) and G - G (—Volts supply).
Connect a 10.0 kΩ , 1% resistor between pins 28A and
28B (+Volts supply) and pins 27A and 27B on the interface
connector. Install the PS 503A into aTM 500 Series Power
Module. Connect a digital voltmeter between the +20-volt
and common output terminals and between the -20-volt
and common output terminals. Adjust R45, +Adj and
R145, -Adj to obtain a 20 V reading for each supply orthe
supply being programmed. Turn off the PS 503A and
remove the 10.0 kΩ, 1% resistor.
NOTE
Do not turn on the PS 503A without a program
resistor connected between pins 28A and 28B
(+Volts supply) and pins 27A and 27B (—Volts
supply) on the interface connector or the over­
voltage protection circuit will cause the fuse to blow.
The PS 503A has now been programmed at 500 G/volt
up to 20 V, i.e„ a 1 kΩ change in the program resistor
results in a 2 V change in the PS 503A output.
A capacitor connected across the points marked C
f
+
or
C
f
–
may be needed to stop oscillations caused by the
lead length associated with the program resistor.
Remote Voltage Program
Dual Tracking. Remove the jumper from A - A, then
connect a jumper between B - B.
Connect the + lead of the remote voltage to pin 20A and
the - lead to pin 24A and 24B on the interface connector.
Install the PS 503A into a TM 500 Series Power Module.
Connect a digital voltmeter between the +20 V and
common output
terminals and between the —20 V and
common output terminals. Apply 9 V from the remote
voltage source to the PS 503A. Adjust R45, +Adj and
R145, —Adj to obtain a 20 V reading for each supply.
4-1