Gossen Metrawatt GmbH 3
13.2 Evaluation of Measured Values...........................56
13.3 Settings for Calculating Short-Circuit Current
– Parameter I
SC
...............................................57
14 Measuring Supply Impedance (Z
L-N
Function)...................58
15 Earthing Resistance Measurement (Function R
E
)..............60
15.1 Earthing Resistance Measurement – Mains
Powered ............................................................61
15.2 Earthing Resistance Measurement – Battery Pow-
ered, “Battery Mode” (PROFITEST MPRO & PROF-
ITEST MXTRA only)............................................61
15.3
Earthing Resistance, Mains Powered – 2-Pole Mea-
surement with 2-Pole Adapter or Country-Specific
Plug (Schuko) without Probe
.............................62
15.4 Earthing Resistance Measurement. Mains Powered
– 3-Pole Measurement: 2-Pole Adapter with
Probe ................................................................63
15.5 Earthing Resistance Measurement, Mains
Powered – Measuring Earth Electrode Potential
(U
E
Function)......................................................64
15.6 Earthing Resistance Measurement, Mains Powered
– Selective Earthing Resistance Measurement with
Current Clamp Sensor as Accessory..................65
15.7 Earthing Resistance Measurement, Battery Pow-
ered, “Battery Mode” – 3-Pole (PROFITEST MPRO
& PROFITEST MXTRA only) ...............................67
15.8
Earthing Resistance Measurement, Battery Powered,
“Battery Mode” – 4-Pole (
PROFITEST MPRO
&
PROFITEST MXTRA
only) .................................... 68
15.9 Earthing Resistance Measurement, Battery Pow-
ered, “Battery Mode” – Selective (4-pole)
with Current Clamp Sensor and PRO-RE Measur-
ing Adapter as Accessory (PROFITEST MPRO &
PROFITEST MXTRA only)...................................70
15.10Earthing Resistance Measurement, Battery Pow-
ered, “Battery Mode” – Ground Loop Measurement
(with current clamp sensor and transformer, and
pro-re measuring adapter as accessory) (PROFIT-
EST MPRO & PROFITEST MXTRA only).............71
15.11Earthing Resistance Measurement, Battery Pow-
ered, “Battery Mode” – Measurement of Soil
Resistivity
E
(PROFITEST MPRO & PROFITEST
MXTRA only) ......................................................72
16
Measurement of Insulation Resistance...................................74
16.1 General..............................................................74
16.2 Special Case: Earth Leakage Resistance (R
EISO
)76
17
Measuring Low-Value Resistance of up to 200
(Protective
Conductor and Equipotential Bonding Conductor) ..................78
17.1 Measurement with Constant Test Current ..........79
17.2 Protective Conductor Resistance Measurement
with Ramp Sequence
– Measurement at PRCDs with Current-Monitored
Protective Conductor using the PROFITEST PRCD
Test Adapter as an Accessory ( PROFITEST
MXTRA only) ......................................................80
18 Measurement with Accessory Sensors..............................81
18.1 Current Measurement with Current Clamp
Sensor...............................................................81
19 Special Functions – EXTRA Switch Position ......................82
19.1 Voltage Drop Measurement
(at Z
LN) – U Function ........................................83
19.2 Measuring the Impedance of Insulating Floors and
Walls (standing surface insulation impedance) – Z
ST
Function.............................................................84
19.3 Testing Meter Startup with Earthing Contact Plug
– kWh Function .................................................85
19.4 Leakage Current Measurement with PRO-AB Leak-
age Current Adapter as Accessory – I
L
Function
(PROFITEST MXTRA only)..................................86
19.5
Testing Insulation Monitoring Devices – IMD Function
(PROFITEST MXTRA only)..................................87
19.6 Residual Voltage Test – U
res
Function(PROFITEST
MXTRA only) ......................................................89
19.7
Intelligent Ramp – ta+ID
Function
(
PROFITEST MXTRA
only).................................... 90
19.8 Testing Residual Current Monitors
– RCM Function ( PROFITEST MXTRA only).......91
19.9 Checking the Operating Statuses of Electric
Vehicles at Charging Stations per IEC 61851
((PROFITEST MTECH+ & PROFITEST MXTRA ) .92
19.10PRCD – Test Sequences for Documenting Fault
Simulations at PRCDs with the PROFITEST PRCD
Adapter (PROFITEST MXTRA only).....................93
19.10.1Fault Simulation ...........................................93
20 Test Sequences (Automatic Test Sequences)
– AUTO Function ................................................................96
20.1 General (test sequence layouts)..........................96
20.2 Creation of Test Sequences with ETC................96
20.3 Using Test Sequences .......................................97
21 Maintenance ......................................................................98
21.1 Test Instrument Firmware/Software....................98
21.1.1 Rechargeable Battery Care ..........................98
21.2 Fuse Replacement .............................................98
21.3 Housing .............................................................98
21.4 Calibration..........................................................98
22 Contact, Support and Service ............................................99
23 CE Declaration .................................................................100
24 Disposal and Environmental Protection ...........................101
25 Appendix ..........................................................................102
25.1 Tables for Determining Maximum and Minimum
Display Values in Consideration of the
Instrument’s Maximum Measuring and Intrinsic
Uncertainties....................................................102
25.2 At which values should/must an RCD actually be
tripped? Requirements for Residual Current
Devices (RCD)..................................................104
25.3 Testing Electrical Machines per DIN EN 60204 –
Applications, Limit Values.................................105
25.4 Periodic Testing per DGUV V 3 (previously BGV A3)
– Limit Values for Electrical Systems and Operating
Equipment .......................................................105
25.5 Bibliography.....................................................106
25.6 Internet Addresses for Additional Information ..106
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