Appendix
The operation uncertainty and the variations of measurement
value for the respective Influence quantity approved by EN/
IEC61557 are as follows:
Influencing factor non-applicable for E
1
and E
4
to E
10
Operation Uncertainty
Intrinsic
uncertainty/
Influence quantity
Operation
range
Variation
Insulation
resistance
Low
resistance
A
Intrinsic
uncertainty
Reference
condition
±5%rdg. ±3%rdg.±2dgt.
E
2
Supply
voltage
4.5 V to 6.8 V ±4%rdg. ±3%rdg.±2dgt.
E
3
Temperature 0°C to 35°C ±4%rdg. ±3%rdg.±2dgt.
B
Operation
uncertainty
±12%rdg. ±30%rdg.
Guaranteed range of operation
uncertainty
1st effective
measurement
range
0.2 to 2
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