Endress+Hauser Fieldgate FXA520, Руководство по эксплуатации

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6 Configuring the Fieldgate Fieldgate FXA520
66 Hauser
6.4.2 Analog input setup
Analog inputs (FXA520 or FXZ520 Analog) can be assigned a tag, engineering units and a
linearization table. The significance of the parameters is described in Table 6-7.
Analog input setup
Table 6-7: Analog input parameters
Linearization
Fig. 6-1 shows an example for a linearization of a horizontal cylindrical tank, of diameter 1.6 m to
a volume scaled to 0% to 100%. The nine linearization points are entered in the form xx.xx;yy.yy
as shown in the table, pressing Enter after every line.
Fig. 6-1: Example of linearization of a horizontal cyclindrical tank.
Parameter Description
Tag
Enter the Device Tag that is to appear in the overview page
Enabled
Check this box if this input is to appear on the overview page
Scaling Unit
Enter the HART unit code for the scaling unit
– Press HART Unit Code to reveal a list of units and codes
Scaling Range
Enter the range end values in engineering units corresponding to the 4 mA and 20 mA signal
Units After
Linearization
Enter the engineering units in plain text to be used after linearization
Linearization Table
Enter a linearization table with maximum 16 value pairs in the form xx.xx;yy.yy
– The first and last values should correspond to the lower and upper range value
– The X values must increase monotonically: if an X value occurs twice in the list, the second
X value in the list is ignored
– The value pairs can be entered in any order. They are sorted by the Fieldgate after sending
– The linearized output value is shown as a secondary value for the device in the Overview page.
Send
Press to register your changes in the Fieldgate.
Reset
Press to discard any changes made since the previous send.
100
0
80
60
40
20
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Input volume %
Input level (m)
Input level (m); Input volume (%)
0.00;0.00
0.20;7.32
0.40;19.67
0.60;34.59
0.80;50.65
1.00;66.67
1.20;81.43
1.40;93.50
1.60;100.00
1.6 m