MRU-200
● MRU-200-GPS – USER MANUAL
51
10 Technical data
The specified accuracy applies to meter terminals.
The abbreviation „m.v.” in the accuracy definition means the measured value.
10.1 Basic data
Interference voltage measurement U
N
(RMS)
Range
Resolution
Accuracy
0
…100 V
1 V
±(2% m.v. + 3 digits)
measurement for f
N
15…450 Hz
frequency of measurements
– minimum two measurements/s
Interference frequency measurement f
N
Range
Resolution
Accuracy
15
…450 Hz
1 Hz
±(1% m.v. + 2 digits)
measurement for interference voltage >1 V (for interference voltage <1 V the following is
displayed: f=---)
Measurement of resistance of protective conductors and equipotential bonding (2P)
The measurement method: in accordance with IEC 61557-5
Range of measurement in accordance with IEC 61557-4: 0,045
… 19,99 k
Range
Resolution
Accuracy
0,000
…3,999 Ω *
0,001
Ω
±(2% m.v. + 4 digits)
4,00…39,99 Ω
0,01
Ω
±(2% m.v. + 2 digits)
40,0…399,9 Ω
0,1
Ω
400…399 9Ω
1
Ω
4,00…19,99 kΩ
0,01
kΩ
±(5% m.v. + 2 digits)
* In 0,000
…0,045 Ω range uncertainty is unspecified.
Measurement of earth resistance
– 3-pole method (R
E
3P), 4-wire method (R
E
4P)
The measurement method: 3-pole, in accordance with IEC 61557-5
Range of measurement in accordance with IEC 61557-5: 0,100
… 19,99 k
Range
Resolution
Accuracy
0,000
…3,999 Ω *
0,001
Ω
±(2% m.v. + 4 digits)
4,00…39,99 Ω
0,01
Ω
±(2% m.v. + 2 digits)
40,0…399,9 Ω
0,1
Ω
400…3999 Ω
1
Ω
4,00…19,99 kΩ
0,01
kΩ
±(5% m.v. + 2 digits)
* For 3-pole method in 0,000
…0,045 Ω range uncertainty is unspecified.
Measurement of resistance of auxiliary electrodes R
H
and R
S
Range
Resolution
Accuracy
0
…999 Ω
1Ω
±(5% (R
E
+R
H
+R
S
) + 8 digits)
1,00
…9,99 kΩ
0,01
kΩ
10,0…19,9 kΩ
0,1
kΩ
