HT Multifunction Installation Tester M74

HT Multifunction Installation Tester M74 is an installation tester for safety tests according to CEI 64-8 with TRMS multimeter functions.

Availability: Available on backorder

HT Multifunction Installation Tester M74 is a device for safety tests according to IEC/EN61557-1 with TRMS multimeter functions.


The 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.
The 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.



To Download Datasheet.
To Download User Manual.


HT Instruments

HT Instruments from Italy is specialized in manufacturing Electrical test equipment. The main areas of specialization are Solar (Photovoltaic), Electric power, and Multimeters Measurements. HT Instruments is well known for its high-quality products and reliability in the design.
Weight1340 g
Dimensions225 × 165 × 75 cm


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