METREL MI3115 - Technical Specifications; Test and Measurements; R ISO PV Insulation Resistance

MI 3115 PV Analyser
Technical specifications
65
10 Technical specifications
10.1
10.1.1 R ISO PV Insulation resistance
General
Nominal d.c. test voltages U
ISO
............. 250 V, 500 V, 1000 V, 1500 V
Open-circuit voltage ............................. -0 % / +20 % of nominal voltage
Measuring current ................................ min 1 mA at nominal resistance R = U
ISO
 1 k/V
Short-circuit current ............................. max. 3 mA
The number of possible tests ............... > 700, with a new fully charged battery pack at 1500
V / 1.5 M
Auto discharge after test.
Specified accuracy is valid up to 100 MΩ if relative humidity is over 85 %.
In case the instrument gets moistened, the results could be impaired. In such case, it is
recommended to dry the instrument and accessories for at least 24 hours.
The error in operating conditions could be at most the error for reference conditions (specified
in the manual for each function) 5 % of measured value.
Insulation resistance - R
OC+,
R
OC-
Nominal test voltage: 250 V d.c.
Measuring range according to EN 61557: 0.12 MΩ 199.9 MΩ
Range (MΩ)
Resolution (MΩ)
Accuracy
Roc+
Roc-
0.01
±(5 % of reading + 3 digits)
20
0.1
±10 % of reading
Nominal test voltages: 500 V d.c., 1000 V d.c. and 1500 V d.c.
Measuring range according to EN 61557: 0.12 MΩ MΩ
Range (MΩ)
Resolution (MΩ)
Accuracy
Roc+
Roc-
0.01
±(5 % of reading + 3 digits)
199.9
0.1
±5 % of reading
200 999
1
±5 % of reading
Insulation resistance - R
OC
Nominal test voltages: 250 V d.c.
Range (MΩ)
Resolution (MΩ)
Accuracy
Roc
0.01
Calculated value
199.9
0.1