MRU-200 ●MRU-200-GPS –USER MANUAL
TABLE OF CONTENTS
1Safety ................................................................................................................5
2Menu..................................................................................................................6
2.1 Wireless transmission..............................................................................................6
2.2 GPS settings ............................................................................................. 6
2.3 Measurement settings.............................................................................................. 7
2.3.1 Mains frequency ............................................................................................................7
2.3.2 Calibration of the measurement clamp C-3 ....................................................................8
2.3.3 Earth resistivity settings...............................................................................................11
2.4 Meter settings.........................................................................................................12
2.4.1 LCD contrast................................................................................................................12
2.4.2 LCD Backlight..............................................................................................................12
2.4.3 AUTO-OFF settings.....................................................................................................12
2.4.4 Display settings............................................................................................................13
2.4.5 Date and time ..............................................................................................................13
2.4.6 Battery discharging......................................................................................................13
2.4.7 Programme update ......................................................................................................14
2.5 Language choice.................................................................................................... 14
2.6 Information on the manufacturer............................................................................14
3Measurements................................................................................................15
3.1 Measurement of resistance of earth connection and equipotential bonding (2P) ..15
3.2 Calibration of the test leads ...................................................................................16
3.2.1 Auto-zeroing on............................................................................................................16
3.2.2 Auto-zeroing off............................................................................................................17
3.3 Earth resistance measurement with 3-pole method (RE3P)................................... 18
3.4 Earth resistance measurement with 4-wire method (RE4P)...................................21
3.5 Earth resistance measurement with 3-pole method with additional clamp (RE3P+C)24
3.6 Earth resistance measurement with 3-pole method with ERP-1 adapter
(RE3P+ERP-1)........................................................................................................27
3.7 Earth resistance measurement with two-clamp method (2C).................................31
3.8 Earth impedance measurement with impulse method (RE4P ).............................33
3.9 Current measurement (I)........................................................................................37
3.10 Earth resistivity measurement (ρ) ..........................................................................38
4Memory ...........................................................................................................41
4.1 Saving of the measurement results in the memory................................................ 41
4.2 Memory erasing ..................................................................................................... 42
4.3 Memory browsing................................................................................................... 43
5Data transmission..........................................................................................44
5.1 Computer connection accessories.........................................................................44
5.2 Connection of the meter to a computer..................................................................44
5.3 Data transmission with Bluetooth module..............................................................44
6Power supply..................................................................................................46
6.1 Monitoring of the power supply voltage.................................................................. 46
6.2 Replacement of accumulators................................................................................ 46
6.3 Fuse replacement ..................................................................................................47
6.4 Charging of accumulators......................................................................................47
6.5 Discharging of accumulators..................................................................................49
