LEM ISO plus, Руководство по эксплуатации

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Technical Data
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Insulation Test R
ISO
measurement
Measuring method: Current,- voltage measurement complying EN 61557 – 2
Nominal test voltage: U
N
= 100V, 250V, 500V, 1000V DC
Open circuit voltage: U
0
< 1.1 x U
N
Nominal current: I
N
≥
1mA DC at U
N
Short circuit current: <10mA DC
Range
Resolution Intrinsic Error Operating error
1.8k
Ω
...2 G 0.1k
Ω
...1M
Ω ±
(1% of measured value + 3D)
±
(2% of measured
value+4D)
2G
Ω
...20G
Ω
*)
10M
Ω ±
(3% of measured value + 3D)
±
(4% of measured
value+4D)
*) + 3 % error at 100 V measuring voltage
Display of the measuring current I
ISO
.
Calculation of Polarisation Index I
P
and Dielectric Absorption Ratio R
ab
R
ab
after pre-defined time interval (Type 2):
I
P
= R
ISO
(10min)/ R
ISO
(1min)
R
ab
= R
ISO
(1min)/ R
ISO
(30sec)
In case of external voltage of >10% of U
N
the measurement
is not started (safety interlock).
Resistance R measurement
Measuring method: Current,- voltage measurement complying EN 61557 – 4
Open circuit voltage: U
0
≥
4V
Short circuit current: I
k
>200mA up to 2
Ω
according to EN61557
Range Resolution Intrinsic Error Operating error
0.2
Ω
...20
Ω
0.01
Ω
±
(1% of measured
value+3D)
±
(2% of measured value + 5D)
20
Ω
...200
Ω
0.1
Ω
200
Ω
...2k
Ω
1
Ω
2k
Ω
...20k
Ω
10
Ω
20k Ω ...200k Ω 100 Ω
±
(1% of measured
value+2D)
±
(2% of measured value + 3D)
In case of external voltage display of >3V the measurement with 200mA is not
started after selecting rotary switch position.
SMR
Serial mode rejection approx. 60dB at 50 and 60Hz
CMR Common mode rejection approx. 80dB at 50 and 60Hz
Test lead compensation possible (ZERO) compensation resistance R
K
.
Continuity check: