KROHNE OPTISWITCH 3300C Relay EN - Manual (Page 21)

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 3300 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 3300 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 relay. 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 (replay contact deenergizes when reaching the
switching point), because the relay takes on the same (safe)
condition if a failure is detected.
Control lamp for indication of the switching condition.
l green = relay energized
l
red = relay deenergized
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
5 3 4
(8) (6) (7)
Relay energized Green
Mode max.
Overfill protection
5 3 4
(8) (6) (7)
Relay deener-
gized
red
Switching point adaptation (1)
Mode adjustment (2)
Signal lamp (5)
OPTISWITCH 3300 C - with relay output 21
Set up
29961
-EN
-060830