WIKA DI35-M Betriebsanleitung Seite 43

7. Description of program numbers
Example
Linearisation of a pressure transmitter for 0 ... 100 mbar with an output signal of
0 ... 20 mA.
Programming with 5 interpolation points.
■
Non-linear range 0 ... 75 mbar.
■
Interpo- Pres-
lation sure
point [mbar]
PN 2 0
PN 101 15
PN 102 30
PN 103 40
PN 104 60
PN 105 75
PN 1 100
For PN 101 this means:
With a pressure of 15 mbar, the transmitter delivers an output signal of 3.3 mA instead
of 3.0 mA. Therefore, before correction, the display shows 16.5 mbar. This value is
adjusted to 15.0 mbar using the interpolation point.
Anzeigewert Display value
100
90
80
70
60
50
40
30
20
101
10
10 20
WIKA operating instructions digital indicator, model DI35-M
Transmitter out-
put signal [mA]
0.5
3.3
6.2
9.2
11.4
14.7
20
105
104
103
102
30 40 50 60
Display value [mbar]
before
linearisation
2.5
16.5
31.0
46
57
73.5
100.0
70 80 90 100
after linearisation
0.0
15.0
30.0
40.0
60.0
75.0
100.0
Mit Linearisierung
With linearisation
Ohne Linearisierung
Without linearisation
Interpolation points Stützpunkte
Measured value Druck
110
EN
43