Fluke 1625 FE 1625 Users Manual - Page 21

Measurement of Interference Voltage DC + AC (UST), Earthing Resistance (RE), Measuring, Range, Display - 2 earth ground tester

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Earth/Ground Tester Specifications Measurement of Interference Voltage DC + AC (UST) Measuring method: fullwave rectification Measuring Range Display Range Resolution Frequency Range Limits of Error 1...50 V 0.0...50 V 0.1 V DC/AC 45...400 Hz sine ± (5% of reading +5 digit) Measuring sequence: Internal resistance: Max. overload: approx. 4 measurements /s approx. 1.5 MΩ Urms = 250 V Measurement of Interference Frequency (FST) Measuring method: Measurement of oscillation period of the interference voltage Measuring Range 16.0 ... 400 Hz Display Range Resolution Range 16.0...299.9...99 9 Hz 0.1 ... 1 Hz 1 V ... 50 V Limits of Error ± (1% v. mv +2 digit) Earthing Resistance (RE) 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: Urms = 250 V 13

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Earth/Ground Tester
Specifications
13
Measurement of Interference Voltage DC + AC (U
ST
)
Measuring method:
fullwave rectification
Measuring
Range
Display
Range
Resolu-
tion
Frequency
Range
Limits of Er-
ror
1…50 V
0.0…50 V
0.1 V
DC/AC
45…400 Hz
sine
± (5% of
reading +5
digit)
Measuring sequence:
approx. 4 measurements /s
Internal resistance:
approx. 1.5 M
Ω
Max. overload:
U
rms
= 250 V
Measurement of Interference Frequency (F
ST
)
Measuring method:
Measurement of oscillation period of the interfer-
ence voltage
Measuring
Range
Display Range
Resolution
Range
Limits of
Error
16.0 … 400
Hz
16.0…299.9…99
9 Hz
0.1 … 1 Hz
1 V …
50 V
± (1% v. mv
+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