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.
| AUTO test (Non-trip ground resistance, RCD, Insulation) in sequence | |
| TRMS | |
| Insulation with voltage 50, 100, 250, 500, 1000VDC | 250V, 500V |
| Continuity of protective conductors with 200mA | |
| Tripping time and current of RCDs type B, A, AC Standard, Selective and Delayed up to 1A | A = 30mA - AC = 300mA only general |
| Non-trip earth resistance | |
| Contact voltage | |
| Phase sequence | |
| Leakage current with optional clamp meter | |
| Protection category | CAT III 550V |
| DC/AC TRMS voltage and current, Frequency, Resistance, Continuity with buzzer | |
| Size (LxWx H) (mm) | 240x100x45 |
| Weight in grams (batteries included) | 630 |
Bag for transporting small to medium-sized devices and accessories.
Soft bag with two big compartments to transport devices and accessories.
Bag with three internal compartments, medium size, for transporting devices and accessories.
