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Operating uncertainty (IEC61557-5)
Operating uncertainty (
B
) is an uncertainty obtained under the
rated operating conditions, and calculated with the intrinsic
uncertainty (
A
), which is an error of the instrument used, and the
error (
En
) due to variations.
The maximum operating uncertainty should be within ±30 %.
Operational uncertainty (
B
) is calculated by the following formula
according to the intrinsic uncertainty (
A
) and variation (
En
) by the
uncertainty from operating condition.
The maximum operating uncertainty should be within ±30 %.
Condition and Ranges under the maximum operating uncertainty
Significant parameter
Ranges
E
1
: Position
Horizontal ± 90 °
E
2
: Supply voltage
Before
turns on
E
3
: Temperature
0
ºC ~ 40 ºC
E
4
: Series interference voltage
0 ~ 10 V : 50/60 Hz
~ 3 V : 400 Hz
~ 6 V : DCV
E
5
: Resistance of electrodes
and auxiliary earth electrodes
~ 10 kΩ
Measurement range
40 Ω : 5.00~40.00 Ω
400 Ω : 20.0~400.0 Ω
4000 Ω : 200~4000 Ω
The product specifications described in this manual and its
appearance are subject to change without notice for improvement
or other reasons.