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Some of the indirect methods in current use for measuring the safety margins of installed electroexplosives are briefly reviewed. The basic requirements of the military specifications are indicated. A direct measurement of resistance variation versus dissipated power, on actual devices, is proposed as a better alternative. The method provides the capability of measuring unmodified real electroexplosives with some temperature coefficient, and also indicates a new utilization of SEM fuses and deactivated EED's for quantitative measurements.