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Earth/Ground Tester
Specifications
43
Interference Frequency (F
ST
) Measurement
Measuring method: Measurement of oscillation period of the interference voltage
Measuring
Range
Display Range Resolution Range Accuracy
16.0 … 400 Hz 16.0…299.9…999 Hz 0.1 … 1 Hz 1 V … 50 V ±(1% rdg +2 digit)
Earthing Resistance (R
E
)
Measuring method: Current and voltage measurement with probe as
IEC61557-5
Open circuit voltage: 20 / 48 V, ac
Short circuit current: 250 mA ac
Measuring frequency: 94, 105, 111, 128 Hz selected manually or automatic. (AFC)
55 Hz in function R*
Noise rejection: >120 dB ( 16 2/3, 50, 60, 400 Hz )
Maximum overload: U
rms
= 250 V
Table 9. Operational Error Calculation
Intrinsic Error or
Influence Quantity
Reference Conditions
or Specified Operating
Range
Designation
Code
Requirements or Test in
Accordance with the
Relevant Parts of IEC 1557
Type
of Test
Intrinsic error Reference conditions A Part 5, 6.1 R
Position Reference position ±90° E1 Part 1, 4.2 R
Supply voltage At the limits stated by
the manufacturer
E2 Part 1, 4.2, 4.3 R
Temperature 0 °C and 35 °C E3 Part 1, 4.2 T
Series interference
voltage
E4 Part 5, 4.2, 4.3 T
Resistance of the
probes and auxiliary
earth electrodes
0 to 100 x R
A
but ≤50 kΩ
E5 Part 5, 4.3 T
System frequency 99 % to 101 % of the
nominal frequency
E7 Part 5, 4.3 T
System voltage 85 % to 110 % of the
nominal voltage
E8 Part 5, 4.3 T
Operating error
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
15,1( EEEEEEEEAB +±=
Part 5, 4.3 R
A = intrinsic error
En = variations
R = routine test
T = type test
[]
100% x
valuefiducial
B
%B ±=
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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