MIC-05s1
– USER MANUAL
60
Approximate maximum values of the measured resistance, depending on the test voltage, are
presented in the table below.
Voltage
Test range
Measuring range for
AutoISO-5000
50 V
200 G
20.0 G
100 V
400 G
40.0 G
250 V
1.00 T
100 G
500 V
2.00 T
200 G
1000 V
4.00 T
400 G
2500 V
10.0 T
400 G
5000 V
20.0 T
400 G
Note:
For insulation resistance below R
ISOmin
there is no accuracy specified because the meter
works with the adjustable current limit in accordance with the following formula:
ISOnom
nom
ISO
ISO
I
V
R
min
where:
R
ISOmin
- minimum insulation resistance measured without limiting the converter current
V
ISOnom
- nominal test voltage
I
ISOnom
– nominal converter current (1.2 mA, 3 mA or 6 mA ±15%)
Additional uncertainty in the three-lead measurement (impact of G terminal): 0.05% with reduced
current leakage incurred by 250 k
Ω resistance during 100 MΩ measurement with 50 V measurement
voltage.
Max. short-circuit current
: 6 mA ±15%
Measuring/charging current in the remaining load range shall be selected from the following values:
1.2 mA, 3 mA, 6 mA.
Measurement with AutoISO-5000
Display range
Resolution
Basic uncertainty
000 k
to 999 k
1 k
±(3% m.v. + 10 digits ) of the
meter
± 1% additional uncer-
tainty of AutoISO-5000
1.00 M
to 9.99 M
0.01 M
10.0 M
to 99.9 M
0.1 M
100 M
to 999 M
1 M
1.00 G
to 9.99 G
0.01 G
10.0 G
to 99.9 G
0.1 G
100 G and above to the
value at which the addi-
tional uncertainty of Au-
toISO-5000 is 5%
1 G
±(3% m.v. + 10 digits ) of the
meter
± 5% additional uncer-
tainty of AutoISO-5000
Measurement of leakage current
Display range
Resolution
Basic uncertainty
0 to 1.2 mA
*
**
0 to 3 mA
0 to 6 mA
* - resolution and units result from the measurement range of individual insulation resistance.
** - calculated basing on resistance measurements
