MI 3155 InstalTest IT-XD

The Metrel MI 3155 Instaltest IT-XD is the flagship of Metrel’s most advanced line of multi-functional measuring instruments and is designed specifically for testing in the industry. What differentiates this instrument from the rest is its ergonomic design and an intuitive user interface, encompassing a memory organizer and fully programmable AUTO SEQUENCEs, managed through a large color touch screen display. It is fully compliant with functionality standards (e.g. IEC/EN 61557) and other reference standards for testing (e.g. IEC/EN/HD 60364-4-41,…) as is required for any instrument that performs TRMS current measurements, RCD tests, line and loop impedance tests with 3 (and 4) wires and earth resistance measurements. Besides those, the instrument supports a wide range of tests and measuring functions, including on-line voltage monitoring, phase sequence testing, varistor testing, PI/DAR calculation, luminance measurement, discharge time testing, ISFL measurements, IMD tests as well as functional and visual inspections. The IT-XD is pre-set with AS/NZS3017 limits for pass/fail indication on tests.

Measuring Functions

• Live Transformer’s Impedance Measurement with Four Wire Test; Hi-precision
• Short Circuit Current evaluation with Calculated Hot factor;
• 3-wire test of PE (RPE function) without extension lead conductor;
• Autotest insulation function between L-N, N-PE and L-PE (R ISO ALL function);
• 4 wire continuity test;
• Insulation resistance with DC voltage from 50 V to 2500 V and PI, DAR calculation;
• Varistor test;
• Continuity of PE conductors with 200 mA DC test current with polarity change;
• Continuity of PE conductors with 7 mA test current without RCD tripping;
• 2-wire and 3-wire loop impedance (L-PE) measurement with Trip Lock RCD function;
• Touch voltage / Contact voltage measurement with external P/S probe.
• 2-wire and 3-wire line impedance (L-L, L-N) measurement;
• 1-phase / 3-phase TRMS voltage and frequency measurements;
• Line, loop and RCD measurements at frequency range 16 … 400 Hz;
• Phase sequence;
• Power and THD measurement (up to the 12th harmonic);
• RCD testing (general and selective, type AC, A, F, B, B+, MI RCD, EV RCD, PRCD, PRCD-K, PRCD-S);
• Earth resistance (3-wire and 2-clamps method);
• Specific earth resistance with Ro-adapter (option);
• TRMS leakage and load currents (option);
• First fault leakage current (ISFL);
• Testing of Insulation Monitoring Devices (IMDs);
• Machine mode support with time discharge;
• Illumination (option);
• High resolution Loop impedance (mΩ) (option);
• EVSE (Electrical Vehicle Supply Equipment) support (option);
• Determining location of cables (option);
• QR and/or barcode scanner support (option).