1
．
Safe Testing .................................................................................. 1
2
．
Features ........................................................................................ 3
3
．
Specification .................................................................................. 6
4
．
Continuity (resistance) tests .......................................................... 9
4
．
1
Instrument layout ................................................................. 9
4
．
2
Resistance of test leads ....................................................... 9
4
．
3
Continuity testing ............................................................... 10
5
．
Insulation Tests ........................................................................... 11
5
．
1
The nature of insulation resistance .................................... 11
5
．
1
．
2
Capacitive current .............................................................. 11
5
．
1
．
3
Conduction current ............................................................ 12
5
．
1
．
4
Surface leakage current ..................................................... 12
5
．
1
．
5
Total leakage current ......................................................... 13
5
．
2
Damage to voltage-sensitive equipment ............................ 13
5
．
3
Preparation for measurement ............................................ 14
5
．
4
Insulation resistance measurement ................................... 14
6
．
Loop Impedance Tests ............................................................... 17
6
．
1
Voltage measurement ........................................................ 17
6
．
2
What is earth fault loop impedance? ................................. 17
6
．
3
Automatic over-temperature cut-out .................................. 17
6
．
4
The loop impedance test ................................................... 18
6
．
5
Loop impedance at 3 phase equipment ............................. 19
7
．
RCD Tests ................................................................................... 21
7
．
1
Purpose of RCD Test ......................................................... 21
7
．
2
What does the RCD test really do? ................................... 21
7
．
3
RCD testing ....................................................................... 21
7
．
4
Testing RCDs used to provide supplementary protection .. 22
7
．
5
Testing time delayed RCDs ............................................... 22
8
．
General ....................................................................................... 23
9
．
Battery replacement .................................................................... 24
10
．
Fuse replacement ....................................................................... 24
11
．
Servicing ..................................................................................... 25
12
．
Case, strap and shoulder pad assembly ..................................... 26
CONTENTS
www.calcert.com
sales@calcert.com
1.800.544.2843
0
5
10
15
20
25
30
