Chapter II
Digital Earth Tester
25
USER MANUAL
CONTENTS
1.
GENERAL INSTRUCTIONS .......................................................................................................... 26
1.1.
Precautions and safety measures ........................................................................................... 26
1.1.1.
Before using the tester ...................................................................................................... 26
1.1.2.
Using the tester ................................................................................................................. 26
1.1.3.
Symbols ............................................................................................................................ 27
1.1.4.
Instructions ....................................................................................................................... 27
1.2.
Warranty .................................................................................................................................. 28
1.3.
Repair and metrological verification ........................................................................................ 28
1.4.
Cleaning .................................................................................................................................. 28
2.
DESCRIPTION OF THE INSTRUMENT ......................................................................................... 29
2.1.
General description ................................................................................................................. 29
2.1.1.
Powering up, powering down and auto-shutoff ................................................................. 29
2.1.2.
Selector switch.................................................................................................................. 29
2.1.3.
"TEST" pushbutton ........................................................................................................... 29
2.1.4.
Voltage presence lamp ..................................................................................................... 29
2.1.5.
RCD range lights .............................................................................................................. 30
2.1.6.
Buzzer .............................................................................................................................. 30
2.1.7.
Digital display.................................................................................................................... 30
2.1.8.
Input terminals .................................................................................................................. 30
2.1.9.
Stand ................................................................................................................................ 30
2.1.10. Mains connector unit and assembly .................................................................................... 30
2.1.11. 12 V mains power supply .................................................................................................... 30
2.2.
Power supply ........................................................................................................................... 31
2.2.1. Supply via an accumulator pack (reminder: CA model ref. HX0086) .................................... 31
2.2.2. V battery supply ................................................................................................................... 34
2.3.
Storage .................................................................................................................................... 36
3.
FUNCTION DESCRIPTION ............................................................................................................ 37
3.1.
&RQWLQXLW\PHDVXUHPHQWV³
x
´
............................................................................................... 37
3.2.
R Earth measurements ............................................................................................................ 38
3.3.
Measuring the "R loop" resistance........................................................................................... 39
3.4.
Ri Insulation Measurements .................................................................................................... 40
3.6.
Measuring AC voltage ............................................................................................................. 41
3.7.
RCD test .................................................................................................................................. 41
3.7.1. Method .................................................................................................................................. 41
3.7.2. Meaning of one of the range lights flashing .......................................................................... 42
4. Technical specifications .................................................................................................................. 43
4.1.
Functional specifications ......................................................................................................... 43
4.1.1.
Continuity (IEC 61557-4, 1997) ........................................................................................ 43
4.1.2.
Earth (IEC 61557-5, 1997) ................................................................................................ 43
4.1.3. R LOOP ............................................................................................................................ 43
4.1.4.
Isolation (IEC 61557-2, 1997) ........................................................................................... 44
4.1.5.
Current (with MN73 clamp) ............................................................................................... 44
4.1.6.
Voltage
....................................................................................................................... 44
4.1.7.
RCD test ........................................................................................................................... 44
4.1.8. Reference conditions ........................................................................................................ 45
4.1.9.
Climatic conditions ............................................................................................................ 46
4.1.10.
Variation in nominal field of use ........................................................................................ 46
5.
SPECIFICATIONS .......................................................................................................................... 49
5.1.
General specifications ............................................................................................................. 49
5.2.
To order ................................................................................................................................... 49