KROHNE OPTISWITCH 3100C Transistor EN - Manual (Page 20)

With the potentiometer you can adapt the switching point to the
solid. It is already preset and must only be modified in special
cases.
By default, the potentiometer of OPTISWITCH 3100 C is set to
the right stop (>0.02 g/cm³ or >0.0008 lbs/in³). In case of very
light-weight solids, turn the potentiometer to the left stop
(>0.008 g/cm³ or >0.0003 lbs/in³). OPTISWITCH 3100 C will
thus be more sensitive and can detect light-weight solids more
reliably.
For instruments detecting solids in water, these values are not
applicable. The potentiometer is preset and must not be
changed.
With the mode adjustment (min./max.) you can change the
switching condition of the transistor output. You can set the
required mode acc. to the "Function chart" (max. - max.
detection or overfill protection, min. - min. detection or dry run
protection).
We recommend connecting according to the quiescent current
principle (transistor blocks when the switching point is
reached) because the transistor output takes on the same
(safe) condition if a failure is detected.
Control lamp for indication of the switching condition.
l
green = output conducts
l
red = output blocks
l
red (flashing) = failure
6.3 Function chart
The following chart provides an overview of the switching
conditions depending on the adjusted mode and level.
Level Switching sta-
tus
Control lamp
Mode max.
Overfill protection
transistor con-
ducts
Green
Mode max.
Overfill protection
transistor blocks
red
Switching point adaptation (1)
Mode adjustment (2)
Signal lamp (5)
20 OPTISWITCH 3100 C - with transistor output
Set up
29954
-EN
-060830