KROHNE OPTISWITCH 5100C Relay EN - Manual (Page 8)

Thanks to its simple and robust measuring system, OPTI-
SWITCH 5100 C, 5150 C is virtually unaffected by the
chemical and physical properties of the liquid.
It functions even under difficult conditions such as turbulence,
air bubbles, foam generation, buildup, strong external vibration
or changing products.
Fault monitoring
The electronics module of OPTISWITCH 5100 C, 5150 C
continuously monitors via frequency evaluation the following
criteria:
l
Strong corrosion or damage on the tuning fork
l
loss of vibration
l
Line break to the piezo drive
If a malfunction is detected or in case of power failure, the
electronics takes on a defined switching condition, i.e. the
relay deenergises (safe condition).
The tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx. 1200 Hz. The
piezos are fixed mechanically and are hence not subject to
temperature shock limitations. The frequency changes when
the tuning fork is covered by the medium. This change is
detected by the integrated oscillator and converted into a
switching command.
OPTISWITCH 5100 C, 5150 C is a compact instrument, i.e. it
can be operated without external evaluation system. The
integrated electronics evaluates the level signal and outputs a
switching signal. With this switching signal, a connected
device can be directly activated (e.g. a warning system, a PLC,
a pump etc.).
The exact range of the power supply is stated in the "Technical
data" in the "Supplement".
3.3 Operation
The switching condition of OPTISWITCH 5100 C, 5150 C with
plastic housing can be checked when the housing is closed
(signal lamp). With the basic setting, products with a density
>0.7 g/cm³ (>0.025 lbs/in³) can be detected. The instrument
can be adapted if products with lower density should be
measured.
Physical principle
Power supply
8 OPTISWITCH 5100 C, 5150 C - with relay output
Product description
30426
-EN
-060831