2
Contents
X.1
SAFETY WARNINGS
4
1.
Introduction
5
2.
Overview
6
2.1
Front panel and controls
6
2.2
Waste electrical and electronic equipment
9
2.3
Battery and Fuse Location, fitting and replacement
9
3.
Operation
10
3.1
General operation – all models
10
3.2
Mode button functions
11
3.3
Test inhibit
12
4.
Voltage, Frequency, Current and temperature measurement
13
4.1
Making a voltage measurement
13
5.
Continuity / resistance measurement
15
5.1
Nulling test lead resistance (up to 9.99ohms)
W
16
5.2
Making a CONTINUITY measurement
17
5.3
Storing / downloading results (MFT1835 only)
17
5.4
Continuity Buzzer ON/OFF
17
5.5
Switch probe (SP5)
18
5.6
Buzzer threshold
18
5.7
Measurement methods and sources of error
18
6.
Insulation resistance
500
V
19
6.1
Making an INSULATION measurement
19
6.2
Insulation test lock
19
6.3
Measurement methods and sources of error
20
7.
Loop Impedance testing
21
7.1
Range selection and test leads
21
7.2
MAKING A LOOP IMPEDANCE MEASUREMENT
23
7.3
Phase to Neutral (or Phase to Phase) testing
28
7.4
Prospective Fault Current and Short Circuit calculation (PFC & PSCC)
29
7.5
Measurement methods and sources of error
30
8.
Residual Current Device testing
31
8.1
MAKING AN RCD MEASUREMENT
32
8.2
Selecting RCD type
32
8.3
½ x I RCD Current Rating (No-trip test)
32
8.4
1 x I RCD Current Rating (Tripping test on 30mA RCD)
34
8.5
2 x I RCD Current Rating (Tripping test on 30mA RCD) – MFT1825 & 1835 ONLY
35
8.6
5 x I RCD Current Rating (Tripping test on 30mA RCD)
35
8.7
Ramp Test
36
8.8
Fast Ramp Test
37
8.9
Type A (DC Sensitive) RCD test
37
8.10
Type B (Pure DC) RCD test
37
8.11
Variable RCDs (not MFT1815)
38
8.12
AUTO RCD testing
38
8.13
3 Phase RCD testing
39
8.14
Touch voltage display
39
8.15
Measurement methods and sources of error
40
8.16
Useful information
41
