ABB AV2123000 Positioner User Manual

CAM CHARACTERIZATION
CAM RADIAL LINES
0 1 2 3 4 5 6 7 8 9 10
20.0
10
18.4
9
16.8
8
15.2
7
13.6
6
SIGNAL RANGE
(4-20 mA)
12.0
EXAMPLE: CONTROLLED MEDIUM
REQUIRED AT 7.8 PSIG TO BE AT
60% OF PISTON TRAVEL.
5
CAM
CONCENTRIC
LINES
10.4
8.8
100
50
0
4
3
7.2
2
5.6
1
4.0
0
0 10 20 30 40 50 60 70 80 90 100
%OFPISTONORVALVETRAVEL
T00797A
Figure C-7. Graph to Cam Data Transfer
CAM SHAPING
C - 7