3.3.2 Insulation Measurement
Influencing
Parameter
Range of
Influence
Quantity
Influenced
Influence
Typical
Maximum
Temperature
-20 to + 55°C
(-4 to 131°F)
M
Ω
R
≤
3G
Ω
3G
Ω
< R < 10G
Ω
10G
Ω
≤
R
1% R/10°C
+ 1pt
2% R/10°C +
2 ct
3% R/10°C +
2 ct
4% R/10°C +
2 ct
V
T
: 50 to 500V
V
T
: 1000V
0.5% R/10°C +
1 ct
1% R/10 °C +
1 ct
Measurement
current
1% R/10°C +
1 ct
2% R/10°C +
2 ct
Relative
humidity
20 to 80% RH
M
Ω
2% R + 1 ct
3% R + 2 ct
V
T
: 50 to 1000V
1% R + 2 ct
Measurement
current
1% R + 2 ct
Supply
voltage
6.6 to 9.6V
M
Ω
0.1% R + 2 ct
50/60Hz
AC voltage
superposed
on the test
voltage (V
T
)
50V:
R
≤
0.1G
Ω
: 4V
from 0.1 to 1G
Ω
: 0.2V
5% R + 2 ct
100 and 250V:
from 100k
Ω
to 10M
Ω
: 20V
from 10M
Ω
to 1 G
Ω
: 0.3V
500 and 1000V:
from 500k
Ω
to 50M
Ω
: 20V
from 50M
Ω
to 3 G
Ω
: 0.3V
Capacitance
in parallel on
resistance to
be measured
0 to 5µF at
1mA
M
Ω
1% R + 1 ct
0 to 2µF
50, 100 and 250V:
from 10k
Ω
to 3G
Ω
6% R + 2 ct 10% R + 2 ct
500 and 1000V:
from 100k
Ω
to
10G
Ω
6% R + 2 ct 10% R + 2 ct
0 to 1µF
50V:
≤
5G
Ω
250V:
≤
15G
Ω
1000V:
≤
100G
Ω
6% R + 2 ct 10% R + 2 ct
