Datasheet

6 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers
Measurement of interference voltage dc + ac (U
ST
)
Measuring Limits of error: method Fullwave rectification
Measuring Range Display Range Resolution Frequency Range Limits of Error
1 V to 50 V 0.0 V to 50 V 0.1 V dc/ac 45 Hz to 400 Hz sine ± (5 % of rdg + 5 digit)
Measuring sequence approx. 4 measurements/s
Internal resistance approx. 1.5 MΩ
Max. overload U
rms
= 250 V
Measurement of interference frequency (F )
Measuring method Measurement of oscillation period of the interference voltage
Measuring Range Display Range Resolution Range Accuracy
6.0 Hz to 400 Hz 16.0 Hz to 299.9 Hz to 999 Hz 0.1 Hz to 1 Hz 1 V to 50 V ± (1 % of 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)
Max. overload U
rms
= 250 V
Electrical measurement specifications
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 See 4.2 and 4.3 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 Part 5, 4.3 R
A = intrinsic error
En = variations
R = routine test
T = type test