MPI-525
– USER MANUAL
61
10.2 Additional data
Data on additional uncertainties are useful mainly when the meter is used in non-standard condi-
tions and for metrological laboratories for the purpose of calibration.
10.2.1 Additional uncertainties according to IEC 61557-2 (R
ISO
)
Significant parameter
Designation
Additional uncertainty
Position
E
1
0%
Supply voltage
E
2
0% (
BAT
is not lit)
Temperature
0...35°C
E
3
2%
10.2.2 Additional uncertainties according to IEC 61557-3 (Z)
Significant parameter
Designation
Additional uncertainty
Position
E
1
0%
Supply voltage
E
2
0% (
BAT
is not lit)
Temperature 0...35°C
E
3
1,2 m lead
– 0%
5 m lead
– 0.011%
10 m lead
– 0.019%
20 m lead
– 0.035%
WS-03, WS-04 lead
– 0.015%
Phase angle
0..30° at the bottom
of test range
E
6.2
0.6%
Frequency 99%..101%
E
7
0%
Network voltage 85%..110%
E
8
0%
Harmonic
E
9
0%
DC component
E
10
0%
10.2.3 Additional uncertainties according to IEC 61557-4 (R
±200 mA)
Significant parameter
Designation
Additional uncertainty
Position
E
1
0%
Supply voltage
E
2
0.5% (
BAT
is not lit)
Temperature 0...35°C
E
3
1.5%
10.2.4 Additional uncertainties according to IEC 61557-5 (R
E
)
Significant parameter
Designation
Additional uncertainty
Position
E
1
0%
Supply voltage
E
2
0% (
BAT
is not lit)
Temperature 0...35°C
E
3
±0.25 digit/°C for 50 V
±0.33 digit/°C for 25 V
Serial interference voltage
E
4
1%, generally according to the be-
low formulas
Resistance of electrodes
E
5
2% generally according to the be-
low formulas and the diagram
Frequency 99%..101%
E
7
0%
Network voltage 85%..110%
E
8
0%
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