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Electrical Installation Tester
Specific ations
89
Operating Uncertainties per EN 61557
The Operating Uncertainty shows the maximum possible uncertainty when all influence
factors E1-E10 are counted.
Volts
R
Lo
EN 61557-4
R
ISO
EN 61557-2
Z
I
EN 61557-3
∆
T
EN 61557-6
I
∆N
EN 61557-6
R
E
EN 61557-5
Intrinsic
Uncertainty A
0.80 % 1.50 % 10.00 % 6.00 % 1.00 % 5.00 % 3.50 %
Influence
Quantity
Volts
R
Lo
EN 61557-4
R
ISO
EN 61557-2
Z
I
EN 61557-3
∆
T
EN 61557-6
I
∆N
EN 61557-6
R
E
EN 61557-5
E1 - Position 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 %
E2 - Supply
Voltage
0.50 % 3.00 % 3.00 % 3.00 % 3.00 % 2.75 %
2.00 %
E3 -
Temperature
0.50 % 3.00 % 3.00 % 3.00 % 3.00 % 2.25 %
1.50 %
E4 - Series
Interferences
Voltage
- - - - - -
2.00 %
E5 - Resistance
of the probes
and auxiliary
earth electrodes
- - - - - -
4.60 %
E6.2 - System
phase angle
- - - 1.00 % - - -
E7 - System
frequency
0.50 % - - 2.50 % - - 0.00 %
E8 - System
voltage
- - - 2.50 % 2.50 % 2.50 % 0.00 %
E9 - Harmonics - - - 2.00 % - - -
E10 - D.C.
Quantity
- - - 2.50 % - - -
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