Table Of Contents - Sonel MRU-11 User Manual

1 Safety ................................................................................................................ 4
2 Turning the meter ON and activating screen backlight ............................... 5
3 Meter configuration ......................................................................................... 6
4 Measurements .................................................................................................. 9
4.1 Measurement of interference voltages DC + AC ...................................................... 9
4.2 Measurement of earth resistances with 3-pole method (R
4.3 Measurement of earth resistances with 4-lead method (R
4.4 Measurement of earth resistances with 2-pole method (R
4.5 Soil resistivity measurement (ρ) ............................................................................. 20
5 Power supply .................................................................................................. 23
5.1 Monitoring the power supply voltage...................................................................... 23
5.2 Replacing (rechargeable) batteries ........................................................................ 24
5.3 General principles regarding using Ni-MH rechargeable batteries ........................ 25
6 Cleaning and maintenance ........................................................................... 25
7 Storage ............................................................................................................ 25
8 Dismantling and disposal ............................................................................. 26
9 Technical data ................................................................................................ 26
9.1 Basic data .............................................................................................................. 26
9.2 Additional data ....................................................................................................... 28
9.2.1 Influence of serial interference voltage on the resistance measurements for function
R 3P, R
E
9.2.2 Influence of the auxiliary electrodes on earth resistance measurements for function
R 3P, R
E
9.2.3 Additional uncertainties according to IEC 61557-5 (R
10 Accessories .................................................................................................... 29
10.1 Standard accessories ............................................................................................ 29
10.2 Optional accessories .............................................................................................. 30
11 Manufacturer .................................................................................................. 31
12 Laboratory services ....................................................................................... 32
4P, ρ ................................................................................................................ 28
E
4P, ρ ................................................................................................................ 28
E
MRU-11 - USER MANUAL
CONTENTS
3P) .................................................... 28
E
3P).............................. 10
E
4P).............................. 14
E
2P).............................. 18
E
3