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Table I. Classification of visual and dimensional requirements
Up
Test Set Mark 127 MOD 4
Next
Operation of timing delay circuits



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MIL-T-21369C(OS)
211
11.437
0.030 (Ref 491050)
212
2.000
0.030 (Ref 491050)
213
0.060, four places (Ref 491050)
3.625
72.000 + 1.000 - 0.000 (Ref 497136)
214
24.000 + 1.000 -0.000 (Ref 893800)
215
Jewels of Pilot Lamps shall be the following colors:
216
Amber
PL 1 through PL 11, PL 13
PL 12, PL 14
Green
Red
PL 15
1. All dimensions are in inches.
2 Requirements identified with an asterisk (") must be verified prior to assembly of the test set.
3. Welding requirements identified with a double asterisk (**) must be verified prior to painting the Instrument Case
(LD 276015).
4. Paragraph references apply to paragraphs of this specification.
5. For other units of inspection which are components of the unit covered by this table usc Test Set Mk 127 Mod 4
Assembly Drawing 1379022
4.8.2 Tests.
WARNING
Since high voltages are present in the test set power supply, be extremely careful to avoid touching
open leads or components. Wherever practical, tests should be conducted with the panel-chassis
asssembly (Drawing 1362835) installed in the instrument case LD276015. Before removing the
pane-chassis assembly from the case, disconect the test set from the power source.
4.8.2.1 Power supply circuit operation. Procedures 4.8.21a through 4.8.2.1e shall be performed
in sequence at a temperature between
and
after the power supply has been calibrated
in accordance with 3.5.1. The panel-chassis assembly shall be removed from the case, energized
(see 6.4.7) and allowed to warm up for 15 minutes before beginning the test.
a. Set the ON-OFF switch at OFF
15

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