63
4.2.5.2
INFLUENCING CONDITIONS
Variation of the measurement
Influencing quantities
Limits of the domain of
use
Typical
Maximum
Temperature
-10 to + 55 °C
1%/10 °C
±
1pt
2%/10 °C + 2pt
Relative humidity
10 to 85% RH at 45°
2%
3% + 2 pt
Power supply voltage
6,8 to 10 V
1%/ V
±
1pt
2%/ V + 2pt
Network frequency of the
installation tested
99 to 101% of nominal
frequency
0.5%
1% + 1 pt
Network voltage of the
installation tested
85 to 110% of nominal
voltage
0.5%
1% + 1 pt
Resistance in series with the
voltage probe (earth in live
condition only)
0 to 15k
Ω
0.1%/k
Ω
0.2%/k
Ω
+ 1pt
Contact voltage (U
C
)
0 to 50V
0.1%/10V
0.2%/10V
4.2.6 WARNINGS OR ERROR REPORTS (EARTH MEASUREMENT IN LIVE
CONDITION)
Preliminary remark:
The complete list of coded errors is given in § 7.
Display – Indication
Remark - Cause
Voltage > U
L
between the TEST key and PE: the measurement is
disabled.
One of the voltages, U
LN
or U
LPE
, is < 90V: the measurement is
impossible.
U
NPE
is AC and > U
L
: the measurement is impossible.
The frequency of U
LN
, U
LPE
, or U
NPE
is < 15.3 Hz or > 65 Hz: the
measurement is impossible.
The rod is not connected, the measurement is stopped.
H
Z
U
C
> 25
(or)
50 V
H
Z
< 90 V
H
Z
U
NPE
> 25 (or) 50 V
< 15.3 Hz
(or) >
65 Hz
U
LN
(or)
U
NPE
(or)
U
LPE
No
rod
Summary of Contents for C.A 6454
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