LEM A188506510, Руководство по эксплуатации

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13
30.0 k
Ω
...299.9 k
Ω
100
Ω
Measuring time:
typ. 8 sec. with a fixed frequency
30 sec. max. with AFC and complete cycle of all
measuring frequencies
Additional error because of probe-and auxiliary earth electrode resistance:
R R
R
digits
H S
E
( )
, %
+
× × +
−
2000
125 10 5
6
Ω
Measuring error of RH and RS:
typ. 10% of ( ) R R R
E S H
+ +
Max. probe resistance:
≤
1 M
Ω
Max. auxiliary earth electrode
resistance:
≤
1 M
Ω
Automatic check if error is kept within the limits required by IEC61557-5/EN61557-5:
If after a measurement of probe- , auxiliary earth electrode- and earthing resistance,
a measurement error of higher than 30 % is assumed because of the influencing
conditions (see diagramm), the display shows a warning symbol
and a notice
that RS or RH are too high.
1000%
F
100%
10%
1%
0,1%
10 100 1k 10k 100k 1M
0,3
1
3
10
30
100
R /R =
H E
300
1000 3000
R
S