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Application area
Functional principle
Voltage supply
OPTISWITCH 5300 C • Two-wire 8/16 mA
3.2
Principle of operation
OPTISWITCH 5300 C is a point level sensor with tuning fork for point
level detection.
It is designed for industrial use in all areas of process technology and
can be used in liquids. It is particularly suitable for applications with
high temperatures up to 450 °C (842 °F) and high process pressure
up to 160 bar (2320 psig).
Typical applications are overfill and dry run protection. The small tun-
ing fork allows the use in pipelines from DN 32 as well as in all kinds
of vessels and tanks.
Thanks to its simple and robust measuring system, OPTISWITCH
5300 C is virtually unaffected by the chemical and physical properties
of the liquid.
It functions even under difficult conditions such as turbulence, foam
generation, buildup, external vibration or changing products.
Function monitoring
The electronics module of OPTISWITCH 5300 C continuously moni-
tors the following criteria via frequency evaluation:
•
Strong corrosion or damage on the tuning fork
•
Loss of vibration
•
Break in the vibration drive circuit
If a malfunction is detected or in case of voltage supply, the electron-
ics takes on a defined switching status, i.e. the relay deenergises
(safe state).
The tuning fork vibrates at its mechanical resonance frequency of
approx. 1400 Hz. When the tuning fork is submerged in the product,
the frequency changes. This change is detected by the integrated
electronics module, passed on to the processing system as a current
value and converted there into a switching command.
Depending on your requirements, OPTISWITCH 5300 C with two-
wire electronics can be connected to different controllers. Compatible
controllers are listed in chapter " Technical data".
The data for power supply are specified in chapter " Technical data".
3.3
Adjustment
With the factory setting, products with a density ≥ 0.7 g/cm³
(0.025 lbs/in³) can be detected. The instrument can be adapted to
products with lower density.
On the electronics module you will find the following display and
adjustment elements:
•
Signal lamp for indication of the operating status (green)
•
Control lamp for indication of the switching status (yellow)
•
Control lamp for fault indication (red)
•
DIL switch for sensitivity adjustment
•
Mode switch for selecting the switching behaviour (min./max.)
•
Test key
3 Product description
9
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