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CONDUCTIVITY_TESTER
2014-11-26 03:22
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For nondestructive testing of printed-circuit conductors, through hole plating, soldered joints, and coils, in resistance range from 0 to 50 milliohms and currents up to 5 amp. Q1 and Q2 protect millivoltmeter from open-circuit voltage over loads by energizing relay K1, interrupting rectified output from cc power supply.-F. W. Kear, Unit Measures Printed Circuit Resistances, Electronics, 34:4, p 64-65.
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