5-3 Test Equipment Required - HP 6269B Operator’s, Organizational, Direct Support And General Support Maintenance Manua L

5-1 INTRODUCTION
5-2 Upon receipt of the power supply, the per-
formance check (Paragraph 5-5) should be made.
This check is suitable for incoming inspection. If
a fault is detected in the power supply while mak-
ing the performance check or during normal opera-
tion, proceed to the troubleshooting procedures
(Paragraph 5-51). After troubleshooting and repair
(Paragraph 5-71), perform any necessary adjust-
ments and calibrations (Pare graph 5-73). Before
TYPE
Differential
Sensitivity: 1mV full scale (min.)
Input impedance: 10M Ω (rein.)
Voltmeter
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Oscilloscope Sensitivity and bandwidth;
100µV/cm and 400KHz for all
measurements except noise spike;
5mV sensitivity and 20 MHz band-
width for noise spike measure-
ment.
Variable Range: 207-253Vac. Recommend-
Voltage
ed minimum output current: 12A,
Transformer 6259B; 22A, 6261B and 6268B;
24A, 6260B: 36A, 6269B.
AC Voltmeter
Sensitivity: 1mV full scale de-
flection (min). Accuracy: 2%.
DC Voltmeter
Sensitivity: 1mV full scale de-
flection (rein). Accuracy: 1%.
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Repetitive
Switching rate: 60-400Hz
Load Stitch Rise time: 2µsec.
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Resistive Values: see Figures 5-2 and 5-5.
Loads
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Current
Values: see Figure 5-8.
Sampling
Resistors
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SECTION V
M A I N T E N A N C E
Table 5-1. Test Equipment Required
REQUIRED
CHARACTERISTICS
returning the power supply to normal operation, re-
peat the performance check to ensure that the fault
has been properly corrected and that no other faults
exist. Before performing any maintenance checks,
turn on the power supply and allow a half-hour
warm-up.

5-3 TEST EQUIPMENT REQUIRED

5-4 Table 5-1 lists the test equipment required to
perform the various procedures described in this
section.
USE
Measure dc voltages;
calibration procedures.
Measure ripple; display
transient recovery wave-
form; measure noise
spikes.
Vary ac input for line
regulation measurement.
Measure ac voltages and
ripple.
Measure dc voltages.
Measure transient re-
covery time.
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Power supply load
resistors.
Measure output current;
calibrate ammeter.
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5-1
TM 11-6625-2958-14&P
RECOMMENDED
MODEL
3420A/B (See
Note on Page 5-2)
140A with 1423A
time base and
1400A vertical
plug-in; 1402A
plug-in for spike
measurement.
- - - -
403B
412A
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See Figure 5-5.
- - - -
A4R123; A4R123A-
:
A4R123B,
6260B only; see
Replaceable Parts
Table.