MIL-R-62197A(AT)
4.7.6 Coil characteristics.
4.7.6.1 Current. To determine conformance to 3.4.4.1, apply 18 vdc to the assembly at the coil for a period of 2 + 1 second. Gradually lower the input voltage to zero and then gradually increase it until the assembly operates. Upon operation (pull-in), the current shall be
between 2.5 and 3.6 mA dc. Lower the input voltage until the contacts return to the de-energized position at which time the drop-out current shall be between .36 and 1.8 mA dc. The difference between the pull-in and drop-out current shall be not less than .70 mA dc.
4.7.6.2 Voltage. To determine conformance to 3.4.4.2, apply 18.0 vdc to the assembly at the coil and maintain it for one-half hour without interruption. At the conclusion of this time, subject the assembly to the current test of 4.7.6.1.
4.7.7 DC resistance. To determine conformance to 3.4.5, subject the assembly to the dc resistance test specified in MIL-STD-202, Method 303. The dc resistance of the coil shall be
2000 + 200 ohms.
4.7.8 Inductance. To determine conformance to 3.4.6, measure the coil inductance using an impedance bridge or equivalent. Inductance shall not exceed 25 H when tested at 60 Hz.
4.7.9 Environmental conditions.
4.7.9.1 Temperature.
4.7.9.1.1 High-temperature. To determine conformance to 3.4.7.1, subject the assembly to the high-temperature test specified in MIL-STD-810, method 501, procedure II, except storage temperature of step 4 shall be 160 F. At the conclusion of the storage temperature test, stabilize the assembly at 145 F and subject it to the performance tests of 4.7.3 thru 4.7.8. After testing, return the assembly to room ambient temperature and subject it to the performance tests of 4.7.3 thru 4.7.8.
4.7.9.1.2 Low-temperature. To determine conformance to 3.4.7.1, subject the assembly to the low temperature test specified in MIL-STD-810, method 502, procedure I. Maintain the temperature at -65 F for a period of not less than 12 hours. At the conclusion of this time, stabilize the assembly at -25 F and subject it to the performance tests of 4.7.3 thru 4.7.8. After testing, return the assembly to room ambient temperature and subject it to the performance tests of 4.7.3 thru 4.7.8.
4.7.9.2 Vibration. To determine conformance to 3.4.7.2, mount the assembly in any axis shown in figure 2 and subject it to the vibration test specified in MIL-STD-810, method 514, procedure VIII, except as follows:
a. Test level shall be the vibration curve shown in figure 1 conducted in a 145 F ambient environment. Time schedule shall be a total of 80 minutes per axis (see figure 2), including 13-1/3 minutes dwell time at each resonance.
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