Contents
SAFETY WARNINGS .................................................................................................................................................................3
1. Introduction .............................................................................................................................................................................4
2. Overview .................................................................................................................................................................................4
2.1 Front panel and controls .................................................................................................................................................6
2.2 Waste electrical and electronic equipment .......................................................................................................................6
2.3 Battery and Fuse Location, fitting and replacement .........................................................................................................6
3. Operation .......................................................................................................................................................................7
3.1 General operation – all models ........................................................................................................................................7
3.2 Mode button functions ...................................................................................................................................................7
3.3 Test inhibit ......................................................................................................................................................................7
4. Voltage, frequency, Current and temperature measurement .........................................................................................................8
4.1 Making a voltage measurement ......................................................................................................................................8
5. Continuity / resistance measurement ............................................................................................................................................10
5.1 Nulling test lead resistance (up to 9.99ohms) ................................................................................................................10
5.2 Making a CONTINUITY measurement ..............................................................................................................................11
5.3 Storing / downloading results (MFT1730 only) .................................................................................................................11
5.4 Continuity Buzzer ON/OFF ...............................................................................................................................................11
5.5 Switch probe (SP5) ..........................................................................................................................................................11
5.6 Buzzer threshold .............................................................................................................................................................12
5.7 Measurement methods and sources of error ...................................................................................................................12
6. Insulation resistance ...............................................................................................................................................................12
6.1 Making an INSULATION measurement.............................................................................................................................12
6.2 Insulation test lock ..........................................................................................................................................................13
6.3 Measurement methods and sources of error ...................................................................................................................13
7. Loop Impedance testing ...........................................................................................................................................................13
7.1 Range selection and test leads ........................................................................................................................................14
7.2 Making a loop impedance measurement .........................................................................................................................15
7.3 Phase to Neutral (or Phase to Phase) testing ....................................................................................................................19
7.4 Prospective Fault Current and Short Circuit calculation (PFC & PSCC) ..............................................................................20
7.5 Zmax test mode (MFT1720 and 1730 only) .....................................................................................................................20
7.6 MAKING A Zmax LOOP IMPEDANCE MEASUREMENT .....................................................................................................20
7.7 MAKING AN R1+R2 LOOP IMPEDANCE MEASUREMENT .................................................................................................21
7.8 Measurement methods and sources of error ...................................................................................................................22
8. Residual Current Device testing ................................................................................................................................................22
8.1 Making an rcd measurement...........................................................................................................................................23
8.2 Selecting RCD type .........................................................................................................................................................23
8.3 ½ x I RCD Current Rating (No-trip test) .........................................................................................................................23
8.4 1 x I RCD Current Rating (Tripping test on 30mA RCD) ..................................................................................................24
8.5 5 x I RCD Current Rating (Tripping test on 30mA RCD) ..................................................................................................25
8.6 RampTest .......................................................................................................................................................................25
8.7 Type A (DC Sensitive) RCD test ......................................................................................................................................26
8.8 Type B (Pure DC) RCD test ...............................................................................................................................................26
8.9 Variable RCDs (not MFT1710) .........................................................................................................................................27
8.10 AUTO RCD testing ..........................................................................................................................................................27
8.11 3 Phase RCD testing ........................................................................................................................................................27
8.12 Touch voltage display ......................................................................................................................................................29
8.13 Measurement methods and sources of error ...................................................................................................................29
8.14 Useful information ..........................................................................................................................................................29
9. Earth resistance measurement..................................................................................................................................................29
9.1 Connection terminals ......................................................................................................................................................29
9.2 Touch voltage limit ..........................................................................................................................................................29
9.4 Making a measurement – Three terminal resistance measurement ..................................................................................30
10. SETUP OPTIONS .......................................................................................................................................................................31
11. Warning messages ................................................................................................................................................................... 32
11.1 Startup warnings ............................................................................................................................................................32
11.2 Battery ............................................................................................................................................................................32
11.3 Battery charger ...............................................................................................................................................................32
11.4 Fuse warning ..................................................................................................................................................................32
11.5 Invalid rotary switch setting .............................................................................................................................................32
11.6 Continuity test ................................................................................................................................................................32
11.7 Insulation test .................................................................................................................................................................32
11.8 RCD Test .........................................................................................................................................................................32
11.9 RCD range selection errors ..............................................................................................................................................32
11.10 Loop Test ......................................................................................................................................................................32
11.11Earth test ........................................................................................................................................................................32
11.12 Test will not start ..........................................................................................................................................................32
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