Sonel MPI-536 - Measurement of Resistance-To-Earth R

MPI-536 – USER MANUAL
130
10.1.6 Measurement of resistance-to-earth R
E
Test range according to IEC 61557-5: 0.50…1.99 k for test voltage of 50 V
and 0.56…1.99 k for test voltage of 25 V
Range
Resolution
Accuracy
0.00…0.35 Ω
0.01 Ω
(2% m.v. + 10 digits)
0.35...9.99 Ω
0.01 Ω
(2% m.v. + 4 digits)
10.0...99.9 Ω
0.1 Ω
(2% m.v. + 3 digits)
100...999 Ω
1 Ω
1.00...1.99 kΩ
0.01 kΩ
 test voltage: 25 V or 50 V rms
 test current: 20 mA, sinusoidal rms 125 Hz (for f
n
=50 Hz) and 150 Hz (for f
n
=60 Hz)
 blocking of measurement at interference voltage of U
N
>24 V
 maximum measured voltage of interferences U
Nmax
=100 V
 maximum resistance of auxiliary earth electrodes 50 kΩ
Measurement of resistance of auxiliary earth electrodes R
H
, R
S
Display range
Resolution
Accuracy
000...999 Ω
1 Ω
(5% (R
S
+ R
E
+ R
H
) + 3 digits)
1.00...9.99 kΩ
0.01 kΩ
10.0...50.0 kΩ
0.1 kΩ
Measurement of interference voltages
Internal resistance: approx. 8 M
Range
Resolution
Accuracy
0...100 V
1 V
(2% m.v. + 3 digits)
Selective measurement of earthing with clamps
Range
Resolution
Accuracy *
0.00…0.35 Ω
0.01 Ω
(8% m.v. + 10 digits)
0.35...9.99 Ω
0.01 Ω
±(8% m.v. + 4 digits)
10.0...99.9 Ω
0.1 Ω
100...999 Ω
1 Ω
1.00....1.99 kΩ
0.01 kΩ
* – at maximum interference current of 1 A
 Measurement with additional current clamps C-3,
 The range of interference current is up to 9.99 A.
Selective measurement of earthing with two clamps
Range
Resolution
Accuracy *
0.00…0.35 Ω
0.01 Ω
(10% m.v. + 10 digits)
0.35...9.99 Ω
0.01 Ω
±(10% m.v. + 4 digits)
10.0...19.9 Ω
0.1 Ω
20.0...99.9 Ω
±(20% m.v. + 4 digits)
* – at maximum interference current of 1 A
 Measurement with transmitting clamps N-1 and receiving clamps C-3.
 The range of interference current is up to 9.99 A.