HT Instruments M74 Installation Tester
HT Instruments M74 Installation Tester Device for safety tests according to IEC/EN61557-1 with TRMS multimeter functions
- M74 measures Overall earth resistance, tripping time of RCDs type AC, Insulation and Continuity of earth and equipotential conductors according to the laws in force in private electric installations.
- In order to make it versatile and fully functional for any kind of end user, the device has been provided with the innovative AUTO: function: by selecting this function and only setting the value of RCD current, M74, connected to a power outlet, carries out tests of overall earth resistance, RCD tests and insulation tests in a sequence.
- At the end of the test, the device shows all results with the indication of compliance or non-compliance with the standards with simple symbols OK or NOT OK.
- M74 has many additional functions such as measurement of phase sequence with 1 terminal, measurement of leakage currents with optional clamp transducer and a powerful multimeter function for measuring voltage and current’s true root mean square value TRMS.
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