Sonel MPI-540 - Low-Voltage Measurement of Continuity of Circuit and Resistance

MPI-540 – USER MANUAL
176
Selective measurement of earthing with two clamps
Range
Resolution
Basic
uncertainty*
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.
Measuring soil resistivity (ρ)
Range
Resolution
Basic
uncertainty
0.0...99.9 Ωm
0.1 Ωm
Depending on the
basic uncertainty of
the measurement R
E
100...999 Ωm
1 Ωm
1.00...9.99 kΩm
0.01 kΩm
10.0...99.9 kΩm
0.1 kΩm
 Measurement with Wenner method,
 Option for setting the distance in meters or feet,
 Selecting a distance: 1 m ... 30 m (1 ft ... 90 ft).
10.1.7 Low-voltage measurement of continuity of circuit and resistance
Measurement of continuity of protective conductors and equipotential bonding with 200 mA 
current
Measurement range according to IEC 61557-4: 0.12…400 Ω
Range
Resolution
Basic uncertainty
0.00...19.99 Ω
0.01 Ω
(2% m.v. + 3 digits)
20.0...199.9 Ω
0.1 Ω
200...400 Ω
1 Ω
 Voltage at open terminals: 4 V…9 V
 Output current at R<2: min. 200 mA (I
SC
: 200 mA..250 mA)
 Compensation of test leads resistance
 Measurements for both current polarizations
Measurement of resistance with low current
Range
Resolution
Basic uncertainty
0.0...199.9 Ω
0.1 Ω
(3% m.v. + 3 digits)
200...1999 Ω
1 Ω
 Voltage at open terminals: 4 V…9 V
 Output current < 8 mA
 Audio signal for measured resistance < 30 ± 50%
 Compensation of test leads resistance