MFT-PRO
Quick reference guide
EN – 1
Table of contents
1.
PRECAUTIONS AND SAFETY MEASURES ....................................................................................... 2
1.1. Before and after use ..................................................................................................................................................................... 2
1.2. After use ....................................................................................................................................................................................... 3
1.3. Definition of measurement (overvoltage) category ....................................................................................................................... 3
2. DESCRIPTION OF THE INSTRUMENT ............................................................................................... 4
2.1. Overview ....................................................................................................................................................................................... 4
2.2. General description....................................................................................................................................................................... 5
2.3. Instrument power supply .............................................................................................................................................................. 5
2.4. Description of measuring leads .................................................................................................................................................... 5
3. SWITCHING ON THE INSTRUMENT, INITIAL SETTING .................................................................... 6
4. MEASURING ......................................................................................................................................... 7
4.1. – Continuity test on protective conductors ................................................................................................................................ 7
4.1.1. Calibration of measuring cables ....................................................................................................................................... 7
4.1.2. Measuring in AUTO mode ................................................................................................................................................ 7
4.2. M - Insulation test ....................................................................................................................................................................... 8
4.2.1. Measuring in AUTO mode ................................................................................................................................................ 8
4.3. RCD – Function test of residual current protections ..................................................................................................................... 9
4.3.1. Measuring tripping time in AUTO mode ........................................................................................................................... 9
4.4. LOOP – Measuring overall earth resistance (noTrip test) .......................................................................................................... 10
4.4.1. Measuring overall earth resistance with no residual current protection tripping ............................................................ 10
4.5. SEQ function – Detection of phase rotation with 1 test lead ...................................................................................................... 11
4.5.1. Measuring phase rotation with only 1 test lead .............................................................................................................. 11
4.6. ENV – Measuring environmental parameters ............................................................................................................................. 12
4.6.1. Measuring environmental parameters ............................................................................................................................ 12
4.7. LEAKAGE – Measuring leakage current .................................................................................................................................... 13
4.7.1. Leakage current measurement ...................................................................................................................................... 13
4.8. ∆V% – Voltage drop on main lines ............................................................................................................................................. 13
4.9. PQA – Real time measurement of network parameters ............................................................................................................. 14
4.9.1. Measurement of network parameters in Single phase systems..................................................................................... 14
5. MAINTENANCE .................................................................................................................................. 15
5.1. General information .................................................................................................................................................................... 15
5.2. Battery replacement.................................................................................................................................................................... 15
5.3. Instrument cleaning .................................................................................................................................................................... 15
6. POWER SUPPLY ................................................................................................................................ 15
7. REFERENCE GUIDELINES ................................................................................................................ 15
8. ENVIRONMENTAL CONDITIONS FOR USE ..................................................................................... 15
9. TECHNICAL SPECIFICATIONS ......................................................................................................... 16
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