HT instruments М75 User Manual
Page 3
M72 - M73 - M74 - M75
EN - 1
Table of contents
1. SAFETY PRECAUTIONS AND PROCEDURES ...................................................................... 2
1.1.
Preliminary instructions .................................................................................................................... 2
1.2.
During use ........................................................................................................................................ 3
1.3.
After use ........................................................................................................................................... 3
1.4.
Overvoltage categories - definitions ................................................................................................. 3
2. GENERAL DESCRIPTION ....................................................................................................... 4
2.1.
Features ........................................................................................................................................... 4
2.2.
TRMS value and mean value - Definitions ....................................................................................... 4
2.3.
True root measn square value and crest factor - Definitions ........................................................... 4
3. PREPARATION FOR USE ....................................................................................................... 5
3.1.
Preliminary checks ........................................................................................................................... 5
3.2.
Power supply .................................................................................................................................... 5
3.3.
Calibration ........................................................................................................................................ 5
3.4.
Storage ............................................................................................................................................. 5
4. OPERATING INSTRUCTIONS ................................................................................................. 6
4.1.
Instrument description ...................................................................................................................... 6
4.2.
Switch on the instrument .................................................................................................................. 7
4.3.
Disable Auto Power OFF.................................................................................................................. 7
4.4.
Modify full scale of external transducers .......................................................................................... 7
4.5.
Set minimum limit threshold on insulation measurement ................................................................. 7
4.6.
HOLD, MAX/MIN/AVG, PEAK± ........................................................................................................ 8
4.6.1.
HOLD ......................................................................................................................................................... 8
4.6.2.
MAX/MIN/AVG ........................................................................................................................................... 8
4.6.3.
PEAK± ....................................................................................................................................................... 8
4.7.
V
Hz: DC/AC voltage and frequency measurement .................................................................... 9
4.7.1.
Anomalous cases which may occur during V
Hz measurements ........................................................... 11
4.8.
A
Hz: DC/AC current and frequency measurement .................................................................. 12
4.8.1.
Anomalous cases which may occur during A
Hz measurements .......................................................... 14
4.9.
: Resistance measurement and continuity test ....................................................................... 15
4.9.1.
"CAL" mode ............................................................................................................................................. 15
4.9.2.
Anomalous cases which may occur during
measurement .............................................................. 16
4.10.
: Phase sequence and phase conformity measurement ............................................................ 17
4.10.1.
Anomalous cases which may occur during tests ..................................................................................... 20
4.11.
LAN: Cabling test (M75) ................................................................................................................. 21
4.11.1.
Anomalous cases which may occur during LAN tests .............................................................................. 22
4.11.2.
SPLIT PAIRS - explication note ............................................................................................................... 22
4.11.3.
Cabling errors detected by the instrument ............................................................................................... 23
4.12.
0.2A: Continuity test on earth conductors (M72, M74, M75) ....................................................... 24
4.12.1.
"CAL" mode ............................................................................................................................................. 25
4.12.2.
Anomalous cases which may occur during
0.2A tests ........................................................................... 27
4.13.
M
: Insulation measure (M72, M74, M75) ..................................................................................... 28
4.13.1.
Anomalous cases which may occur during M
tests ............................................................................... 29
4.14.
RCD: Tests on AC type RCDs (M73, M74, M75) ........................................................................... 30
4.14.1.
Anomalous cases which may occur during RCD tests ............................................................................. 31
4.15.
Ra : Measurement of global earth resistance (M73, M74, M75) ................................................ 33
4.15.1.
Anomalous cases which may occur during Ra tests ............................................................................ 35
4.16.
AUTO: Automatic cycle of measurements (M74, M75) .................................................................. 37
5. MAINTENANCE ...................................................................................................................... 39
5.1.
General ........................................................................................................................................... 39
5.2.
Battery replacement ....................................................................................................................... 39
5.3.
Cleaning ......................................................................................................................................... 39
5.4.
End of life ....................................................................................................................................... 39
6. TECHNICAL SPECIFICATIONS ............................................................................................. 40
6.1.
Reference guidelines ...................................................................................................................... 42
6.2.
General specifications .................................................................................................................... 42
6.3.
Environment ................................................................................................................................... 42
6.3.1.
Environmental conditions ......................................................................................................................... 42
6.4.
Accessories .................................................................................................................................... 42
7. SERVICE ................................................................................................................................ 43
7.1.
Warranty conditions ........................................................................................................................ 43
7.2.
After-sale service ............................................................................................................................ 43