3.10.3.7 Example for Scaling of Analog Display Ranges
Voltage A-B is selected as the measurand to be transmitted by channel A-1.
The measuring range is from 0 to 1.5 V
nom
with V
nom
= 100 V.
The range to be transmitted is from 0.02 to 1 V
nom
with the associated display
range from 4 mA to 18 mA.
The knee-point of the characteristic is 0.1 V
nom
with an associated display of
16 mA.
Measurands Range
Measurands of the variable Mx 0 V ... 150 V
Associated scaled measurands 0 ... 1
Measurands to be output Range
Measurands with knee-point to be output 2 V ...10 V... 100 V
Associated scaled measurands 0.013 ... 0.067 ... 0.67
with:
Mx,scal,min = (2 V - 0 V ) / (150 V - 0 V ) = 0.013
Mx,scal,knee = (10 V - 0 V ) / (150 V - 0 V ) =
0.067
Mx,scal,max = (100 V - 0 V ) / (150 V - 0 V ) =
0.67
Measurands Analog display values
Measurands in the range "Measurands to be
output"
0.02 ... 0.1 V
nom
... 1 V
nom
4 mA ... 16 mA ... 18 mA
In this example the following P634 settings are selected in the menu branch
Parameter/Config. parameters:
3 Operation P634
P634/EN M/R-42-A // P634‑311‑653 3-55
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