Clamp-On Ground Tester Model 6418
21
Current measurement:
Quantities of
influence
Range of influence
Influence
Typic
al
Maxim
um
Temperature
-4 to 131 °F (-20 to +
55 °C)
0.5
δ
/ 10°C ± ct
1.5
δ
/ 10°C + ct
Relative
humidity
10 to 90% RH
0.5
δ
± ct
1
δ
± ct
Supply voltage
4 to 6.5 V
0.05
δ
± ct
0.1
δ
± ct
Position of
conductor
from the edge to the
center
0.05
δ
± ct
0.2
δ
± ct
Position of
clamp
+/- 180°
0.1
δ
± ct
0.25
δ
± ct
Proximity to
magnetic mass
Steel sheet 1mm
thick against air
gap
0.1
δ
± ct
0.2
δ
± ct
Magnetic field
50/60Hz
10 A/m
0.75 mA
1.5 mA
30 A/m
2 mA
4.5 mA
100 A/m
8 mA
15 mA
Deformation of
the leakage
current
IEC 61557-13
5% to 150 Hz
at 0°
6% to 250 Hz
at 180°
5% to 350 Hz
at 0°
0.05
δ
± ct
0.1
δ
± ct
Adjacent
conductor
I < 40A
> 70 dB
> 66 dB
Frequency of
the leakage
current
47 to 800 Hz 1
0.5
δ
± ct
1
δ
± ct
1: For the whole current measurement range
