MPI-520 OPERATING MANUAL version 3.4
10.2.1 Additional uncertainties according to IEC 61557-2 (R
ISO
)
10.2.2 Additional uncertainties according to IEC 61557-3 (Z)
5 m lead – 0.011Ω
10 m lead – 0.019Ω
20 m lead – 0.035Ω
WS-03, WS-04 lead – 0.015Ω
Phase angle 0..30°C at the bot-
tom of test range
Network voltage 85%..110%
10.2.3 Additional uncertainties according to IEC 61557-4 (R ±200 mA)
10.2.4 Additional uncertainties according to IEC 61557-5 (R
E
)
Serial interference voltage
1%, generally according to the be-
low formulas
2% generally according to the be-
low formulas and the diagram
Network voltage 85%..110%
Additional uncertainty caused by serial interference voltage
Additional uncertainty [Ω]
±((0.01R
E
+ 0.012)U
Z
+ 0.003 U
Z
2
)
±((0.001R
E
+ 0.05)U
Z
+ 0.001 U
Z
2
)
±((0.001R
E
+ 0.5)U
Z
+ 0.001 U
Z
2
)