Owner's manual

(i) Scale baseline by marking left end 0%.
Mark 20% point four blocks to right
horizontally. Continue labeling in 20%
increments up to 100%.
(j) Plot points on graph (Graph 2) with
data fmm system flow chart (Table
2- 1). For example: Using Table 2- 1 in
Graph 2, at a 20% input signal, percent
of flow is 35%; follow 20% input
signal line until it intersects 35% flow
line; place a mark at this point. Repeat
thii procedure for 40%. 60%, SO%, and
100% input signals, placing marks at
each intersection with corresponding
flow line. Connect these. points with a
smooth c~rye. starting at a point with
zero % flow and zero % input signal.
Label curve X.
(k) Draw a straight line from zero point on
cnrve x to 100% point on curye x.
Label this line curve Y.
(1) From 10% increment on “% Input
Signal” scale, draw a horizontal line to
curve Y (Graph 3).
(m) From point in step (l), draw a vertical
line downward to meet clwe X.
(n) From point in step (m), draw a
horizontal line to “% Cam Rotation”
scale.
(0) Repeat process from step (1) through
steo (n) for 20% to 90% inuut sienal.
_
- I
@) Value of “% Cam Rotation” is read
where line in step (n) intersects “%
Cam Rotation” scale. Estimate value by
using percentage scale on left edge of
graph. Copy Table 2-2 and record
values in 46 Cam Rotation in blank
column and again in Table 4-l
Characterized column for future
reference.
(q) If power positioner is direct acting,
make a copy of Figure 2-10, Direct
Acting Cam. If power positioner is to
be reverse acting, make a copy of
Figure 2-11, Inverse Acting Cam.
Table 2-2. Cam Rotation Points.
Example:
Record Values from step (0):
% INPUT SIGNAL
% CAM ROTATION % INPUT SIGNAL
96 CAM ROTATION
0 0 0
10 3 10
20 9 20
30
16 30
40 23 40
50 33 50
60 45 60
70
55
70
80 67 80
90 84 90
100 100 100