Technical Specifications; Basic Data - Sonel MIC-2501 Operating Manual

12.1 Basic data

 Abbreviation "m.v." used in the specification of basic uncertainty means standard measured value
AC / DC voltage measurement
Display range
0...299.9 V
300...750 V

Frequency range for AC: 45 Hz...65 Hz
Measurement of insulation resistance
Measuring range according to IEC 61557-2: R
Double-lead measurement
Display range
0.0 k...999.9 k
1.000 M...9.999 M
10.00 M...99.99 M
100.0 M...999.9 M
1.000 G...9.999 G
10.00 G...99.99 G
100.0 G...999.9 G
1000 G

When the range is exceeded, the device displays ">xxxxGΩ" (where xxxx is the limit value for
the selected range).
Approximate maximum values of the measured resistance, depending on the test voltage, are pre-
sented in the table below. For other voltages the range limits may be read from the chart below.

Note: For insulation resistance below R
works with the adjustable current limit in accordance with the following formula:
where:
R
ISOmin
U
ISOnom
I
ISOnom

Max. short-circuit current: I
28

12 Technical specifications

Voltage
up to 100 V
200 V...400 V
500 V...900 V
1000 V...2400 V
2500 V
– minimum insulation resistance measured without limiting the converter current
– nominal test voltage
– nominal inverter current (1 mA)
= 1.4 mA ±15 %
SC
OPERATING MANUAL MIC-2501 version 1.04
Resolution
0.1 V
1 V
= U
ISOmin ISOnom
Resolution
0.1 k
0.001 M
0.01 M
0.1 M
0.001 G
0.01 G
0.1 G
1 G
Test range
1000 G
there is no accuracy specified because the meter
ISOmin
U
 ISO nom
R
ISO min
I
ISOnom
Basic uncertainty
(3% m.v. + 2 digits)
...1000 G (I
/I
ISOnom
Basic uncertainty
 (3 % m.v. + 20 digits)
50 G
100 G
250 G
500 G
= 1 mA)
ISOnom