Pr
o
Minent
®
Page 17
Settings
•
4 - 20 mA:
at 4 mA the gamma/ L does not operate
at 20 mA the gamma/ L operates at 180 strokes/min.
Between these two extremes the stroke rate is proportional to the electrical
signal.
For signals of below 3.8 mA a fault will be detected and the gamma/ L will stop
(e.g. cable break).
•
Curve:
In the “curve” processing mode you can programme the gamma/ L ratios.
There are 3 options available:
•
= straight line
•
= lower band
•
= upper band
P
P
P
P
P
P
P
P
P
Continuous
display
g
l
a
n
a
Set
e
v
r
u
c
Set
Analog
n
o
r
e
Set
Analog
Set
Analog
0
4
o
1
i
Analog
mA
Set
0
2
1
2
f
Analog
Freq.
Set
0
6
o
1
f
Analog
Freq.
Set
0
6
1
2
i
Analog
mA
Set
t
e
s
Straight line:
The following symbol appears in the LCD display:
.
You can enter any stroke frequency ratio for the gamma/ L in proportion to the electrical
signal. You must enter two points P1 (I1, F1) and P2 (I2, F2). F1 is the stroke rate at which
the pump should operate at current I1: the straight line and the ratio are fixed accordingly:
I [mA]
I 1
I 2
F1
F2
F
max
0
20
P1
P2
Fig. 20
GUIDELINE
Draw a diagram like the one above - with values for (I1, F1) and (I2, F2) - in order to
set the gamma/ L to your required stroke rate !
