Keysight e3620a, Operating And Owners Manual

Page: 15 / 28

A-1
SERVICE INFORMATION
MAINTENANCE
INTRODUCTION
This section provides performance test, troubleshooting infor-
mation, and adjustment and calibration procedures. The fol-
lowing operation verification tests comprise a short procedure
to verify that the power supply is performing properly, without
testing all specified parameters.
If a fault is detected in the power supply while making the
performance check or during normal operation, proceed to
the troubleshooting procedures. After troubleshooting, per-
form any necessary adjustments and calibrations. Before
returning the power supply to normal operation, repeat the
performance check to ensure that the fault has been properly
corrected and that no other faults exist.
Test Equipment Required
Table A-1 lists the equipment required to perform the various
procedures described in this section.
Operation Verification Tests
The following tests assure that the power supply is per-
forming properly. They do not, however, check all the speci-
fied parameters tested in the complete performance test
described below. Proceed as follows:
a. Perform turn-on checkout procedure given in page 1-11 .
b. Perform the load regulation performance tests given in
the following paragraphs.
Line Voltage Option Conversion
To convert the supply from one line voltage option to another,
the following three steps are necessary:
a. After making certain that the line cord is disconnected
from a source of power, remove the top cover from the
supply and set the two sections of the line voltage selec-
tor switch for the desired line voltage (see
Figure A-1 ).
b. Check the rating of the installed fuse and replace it with
the correct value, if necessary. For Option OE3, use a
slow-blow 1 amp fuse. For standard and Option OE9, use
a slow-blow 2 amp fuse.
c. Mark the instrument clearly with a tag or label indicating
the correct line voltage to be used.
Figure A-1. Line Voltage Selector (set for 115 VAC)
Table A-1. Test Equipment Required
TYPE REQUIRED CHARACTERISTICS
USE
RECOMMENDED
MODEL
Oscilloscope Sensitivity : 100

V
Bandwidth : 20 MHz/100 MHz
Display transient response and ripple
and noise waveforms. Keysight 54503A
RMS Voltmeter True rms, 20 MHz bandwidth
Sensitivity : 1 mV
Accuracy : 5% Measure rms ripple and noise
voltage.
Multimeter Resolution : 100 nV
Accuracy : 0.0035% Measure DC voltages. Keysight 34401A
Electronic Load Voltage Range : 240 VDC
Current Range : 10 ADC
Open and short switches
Transient on/off Measure load and line regulation. Keysight 6063A
Resistive Loads (R
L
) 25

5% 100 W Measure ripple and noise.
Current Sampling
Resistor (Shunt) 0.1

0.1% 3 W Measure output current.
Variable Voltage
Auto Transformer Range : 85-130 and 200-260 Volts Vary AC input.