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

MPI-540 ● MPI-540-PV – BRIEF USER MANUAL
64
8.1.7 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
Accuracy
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
Accuracy
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
8.1.8 Measurement of insulation resistance
Measurement range, according to IEC 61557-2 for U
N
= 50 V: 50 kΩ…250 MΩ
Display range for
U
N
= 50 V
Resolution
Accuracy
0 k...1999 k
1 k
(3% m.v. + 8 digits),
[(5% m.v. + 8 digits)] *
2.00 M...19.99 M
0.01 M
20.0 M...199.9 M
0.1 M
200 M...250 M
1 M
* – for WS-03 and WS-04 leads
Test range according to IEC 61557-2 for U
N
= 100 V: 100 kΩ…500 MΩ
Display range for
U
N
= 100 V
Resolution
Accuracy
0 k...1999 k
1 k
(3% m.v. + 8 digits)
[(5% m.v. + 8 digits)] *
2.00 M...19.99 M
0.01 M
20.0 M...199.9 M
0.1 M
200 M...500 M
1 M
* – for WS-03 and WS-04 leads
Test range according to IEC 61557-2 for U
N
= 250 V: 250 kΩ…999 MΩ
Display range for
U
N
= 250 V
Resolution
Accuracy
0 k...1999 k
1 k
(3% m.v. + 8 digits)
[(5% m.v. + 8 digits)] *
2.00 M...19.99 M
0.01 M
20.0 M...199.9 M
0.1 M
200 M...999 M
1 M
* – for WS-03 and WS-04 leads