xLogic SuperRelay User’s Manual
40
A pressure sensor converts a pressure of 1000 mbar into a voltage of 0 V, and a
pressure of 5000 mbar into a voltage of 10 V.
Actual value = (internal value . gain) + offset, thus
1000 = (0·A) + B, i.e. offset B = 1000
5000 = (1000
∙A) +1000, i.e. gain A = 4
Example of analog values
Process
variable
Voltage
(V)
Internal
value
Gain
Value
shown
(Ax)
0
C 3
0.1
–
0
+70
0
C 10
0.1
–
70
1000 mbar 0
4
1000
3700 mbar 6.75
4
3700
5000 mbar 10
4
5000
0
0.01
0
5
0.01
5
10
0.01
10
0
1
0
5
1
500
10
1
1000
0
10
0
5
10
5000
10
10
10000
0
0.01
5
5
0.01
10
10
0.01
15
0
1
500
5
1
1000
10
1
1500
0
1 –
–200
5
1 –
300
10
1 –
800
0
10 –
–10000
10
10 –
0
0.02
0.01
0
0.02
0.1
0
0.02
1
2
0.02
10
20