English
C.A 6423 Earth Tester
23
4. SPECIFICATIONS
4.1 REFERENCE CONDITIONS
Temperature
23°C ± 3K
Relative humidity
45% < HR < 55%
Supply voltage
10,5V ± 0,2V
Auxiliary resistance R
H
, R
S
and R
E
Nil
AC and DC interference voltages
Nil
Electric field
< 1V/m
Magnetic field
< 40A/m
4.2 METROLOGICAL SPECIFICATIONS
Measurement
range
(automatic range)
Resolution
Measurement
current square
signal 128Hz)
Accuracy
Empty
voltage
0,00 … 19,99
:
0,01
:
10mA
± 2%L ± 1pt
d
42V
crête
20,00 … 199,9
:
0,1
:
1mA
Typical 2%L
5%L max. ± 3pt
d
42V
crête
200,0 … 1999
:
1
:
100
A
± 2%L ± 3pt
d
42V
crête
Response time
Between 4 and 8s depending on measurement conditions
4.3 DISTORTION QUANTITIES
Operating limits
Max variation
Temperature
-10 … +55°C
± (1%rdg ± 1pt) per 10°C
Relative humidity
20 … 90%
± 2%rdg ± 5pt
Opertaing voltage
8,8 … 12,5V
± (1%rdg ± 1pt) per Volt
Voltage circuit load (1)
50k
:
± 1%rdg ± 10k
:
± 4pt
0,00 … 19,99
:
30k
:
± 1%rdg ± 10k
:
± 2pt
20,00 … 199,9
:
30k
:
± 1%rdg ± 10k
:
± 2pt
Current
circuit load (2)
200,0 … 1999
:
50k
:
± 1%rdg ± 10k
:
± 2pt
DC voltage
0 … 20V (3)
negligible
AC interference voltages on H
0 … 23V
rms
or 32V
peak
± 2%rdg ± 2pt
AC interference voltages on S
0 … 9V
rms
or 13V
peak
± 0,5%rdg ± 2pt
(1) Resistance measured or resistance of rod E + resistance of rod S + resistance
of leads
