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ASTM G 57
Capable of measuring earth voltage(VA.C.) 2mA measuring current permits the testing of earth resistance without tripping earth leakage current circuit breakers in the circuit. Auto power off function. The t i merop era t es auto power off function. The time operates the PUSH BUTTON SWITCH and TIMER ON BUTTON are pressed together. This will keep the test NO for.
Then auto power off.
Specifications: