Section X. UNIT TESTING PROCEDURES

11-6130-385-34

Section X. UNIT TESTING PROCEDURES

3-41. General

3-42. Test Equipment Setup

CAUTION

a. Preliminary Setup.

( 1 ) Connect dc power supply to unit under test.

The procedures in this section are to be

( 2 ) Apply power to all test equipment.

p e r f o r m e d only after preceding sections of

( 3 ) Adjust each phase load to zero.

this chapter have been performed. This will

(4) Insure that the load is Y-connected.

prevent further damage to other faulty

b. Setup Limits and Recording Accuracy.

c i r c u i t s that may be present in a unit not

±.1v.

(1) Ac and dc volts.

troubleshooting

processed

through

±3.75 w.

( 2 ) Ac power

procedures.

±.1 A.

(3) Dc

T h i s section covers testing procedures for use by

± Hz.

( 4 ) Frequency

d i r e c t support maintenance personnel to determine

Preset.

( 5 ) Power factor

w h e t h e r the performance of repaired equipment is

Nearest .1%.

( 6 ) Distortion

s a t i s f a c t o r y for return to users. See table 3-5 and

Nearest .1%.

( 7 ) Efficiency

figure FO-8 for test setup. Use figure 3-31 for

c. Performance Tests. Record required readings as

distortion testing. Testing shall be in the order given

shown on table 3-9. This form, if used, must be

in this section to insure a logical, sequential method

p r e p a r e d by the maintenance technician.

of testing. Table 3-8 sets forth the order of procedure

to insure conformance with the specified parameters.

Data may be reocrded on form as shown in table 3-9.

Figure

3-31.

Trimmer

fixture

NOTE

3-43. No-Load Test Procedure

The wattmeter and monitor selectors are

a. Set equipment as follows:

changed as required to monitor or adjust the

(1) Load settings

particular parameter being tested.

No load.

(2) Load function

b. Observing the direct current, turn the dc power

AØ

(3) Wattmeter selector

3-52