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|  MIL-T-21369C(OS)
h. Connect the decade resistor specified by 4.71 across the terminals of the VOLTAGE and
LEAKAGE meter.
i. Set the ON-OFF switch at ON.
j. Adjust the decade resistor until the VOLTAGE and LEAKAGE meter indicates exactly 50.
The decade resistor shall indicate 1,000 10 ohms.
4.8.2 .6.6.2 Continuity of the ON-OFF switch with the switch at the OFF position. Procedures
4.8.2.6.6.2a and 4.8.2.6.6.2b shall be performed immediately following 4.826.6.1j.
a. Set the ON-OFF switch at OFF. The VOLTAGE and LEAKAGE meter shall indicate O.
b. Disconnect the dry cell, resistor and potentiometer from the terminals of the VOLTAGE and
LEAKAGE meter.
4.8.2.6.63 Resistor R14. With the panel-chassis assembly removed from the case, procedures
4.8.2.6.6.3a, 4.8.2.6.6.3b and 4.8.2.6.6.3c shall be performed in squence.
a. Set both the ON-OFF switch and the TEST SELECTOR switch at OFF.
b. Set the 5 Meg-50 Meg switch at 50 Meg.
c. Connect the ohmmeter or resistance bridge specified by 4.7m to the chassis and the negative
jack P7, located in the chassis. The ohmmeter or resistance bridge shall indicate 0.1 megohm
1 percent
4.8.2.6.6.4 Resistor R5. Immediately after performing 4.8.2.6.6.3c, set the 5 Meg-50 Meg switch
at 5 Meg. The ohmmeter shall indicate 10,000 ohms 1 percent. Remove ohmmeter.
4.%2.7 Insulation resistance.
4.8.2.7.1 Conditioning. To expedite production, insulation resistance may be measured at any
and at any relative humidity above 70 percent. When a test set fails to
temperature above
meet requirements under these conditions, it shall then be conditioned for at least 24 hours at a
and a relative humidity of 75 5 percent. Within one-half hour after
temperature of 77
such conditioning, procedures 4.8.2.7.2a through 4.8.2.7.2h shall be performed at a relative humidity
of 60 percent or more.
4.8.2.7.2 Test procedures. Procedures 4.8.2.7.2a through 4.8.2.7.2f shall be performed in
sequence. Following 4.8.2.7.2f all measurements required by 4.8.2.7.2g and 4.8.2.7.2h shall be
made. The resistance device specified by 4.7n shall be used to determine all insulation resistance.
a. With the test set connected to a 115 volt A.C. supply, set the ON-OFF switch at ON.
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