MIL-R-83516B
d. Examinations following test: Relays shall be examined for evidence of arcing, flashover, insulation breakdown, and damage.
4.6.7 Insulation resistance (see 3.10). Relays shall be tested in accordance with method 302 of MIL-STD-202. The following details shall apply:
a. Test condition: A.
b. Points of measurement: Shall be as specified (see 3.1).
4.6.8 DC coil resistance (see 3.11). Relays shall be tested in accordance with method 303 of MIL-STD-202.
4.6.9 Coil transient suppression (applicable to relays with internal diodes) (see 3.12). Nominal rated voltage shall be applied to the coil. A cathode ray oscilloscope shall be used to monitor the voltage across the coil. The coil voltage shall be instantaneously removed and the monitor observed to verify the transient voltage generated.
4.6.10 Pickup and dropout voltages (as applicable, see 3.1) (see 3.13). Relays shall be tested as specified in
4.6.10.1 and 4.6.10.2, as applicable. The relay mounting position shall be as specified (see 3.1). A suitable indicating device shall be used to monitor contact operation.
4.6.10.1 Pickup voltage.
4.6.10.1.1 Latching relays. Before measuring the pickup (operate) voltage on dual coil relays, establish that all contacts are in their last energized mode. If not, apply rated voltage to establish the last energized contact position. Gradually increase the voltage to the latching coil until the contacts transfer and measure the operate voltage. Apply rated latching voltage and reduce to zero. Gradually increase the voltage to the reset coil (or in the reset direction for single coil relays) until the contacts transfer and measure the reset (operate) voltage.
4.6.10.1.2 All other relays. Rated voltage shall be applied to the coil for a period of 1 to 3 seconds. The voltage shall be gradually reduced to zero. The voltage shall then be gradually increased until the relay operates, and the pickup voltage shall be measured.
4.6.10.2 Dropout voltage (not applicable to latching relays). Rated voltage shall be applied to the coil. The voltage shall be gradually reduced until the contacts return to the deenergized position, and the dropout voltage shall be measured.
4.6.11 Coil power dissipation (when specified, see 3.1) (see 3.14). Relays shall have the coil energized with rated voltage (see 3.1) with the relay stabilized at 25°C ±5°C. The coil power shall be measured within the first minute.
4.6.12 Static contact resistance (see 3.15). Relays shall be tested in accordance with method 307 of MIL-STD-
202. The following details and exceptions shall apply:
a. Method of connection: Between the measuring apparatus and the relay terminals. Voltage-sensing leads shall be connected in such a way as to exclude the resistance of the current-carrying leads.
b. Test loads: 5 V dc at 10 mA (maximum or peak ac) for qualification inspection; 0.05 V dc at 10 mA (maximum or peak ac) for group A inspection.
c. Points of measurements: All mated contacts in their closed position (the coil shall be energized with rated voltage if necessary to effect contact closure).
d. Number of activations prior to measurement: None.
e. Number of test actuations: Three for qualification inspection (the contact load shall not be applied during contact transfer). For quality conformance inspection, one test actuation shall be made.
f. Number of measurements per actuation: One in each closed contact position.
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