ACS-CONTROL-SYSTEM GmbH
l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l [email protected]
5
1 .4 Function
1 .4 .1 Measuring principle
The transducer of the ultrasonic sensor transmits ultrasonic pulses to the product surface.
These pulses are reflected by product surface and received back by the transducer as echoes.
The running time of the ultrasonic pulses from emission to reception is proportional to the distance
and hence the level.
Because the running time of the ultrasonic pulses is highly dependent on the environmental
temperature, the temperature dependent change of sound velocity must be compensated.
A temperature sensor, which is integrated in the ultrasonic sensor, is used for the temperature
measurement.
1 .4 .2 Signal processing
The running time determined level is processed by the integrated evaluation electronic according to
the respective preferences:
•
The measuring value is monitored by four PNP switch outputs for exceedance of limit values.
•
The measuring value is converted into a continuous current signal 0/4...20mA or voltage signal
0…10V.
•
The measuring value is diagrammed at the high brightness and high contrast TFT-LCD display,
whereby it can be selected between different display styles (digital value / manometer / chart / bar
graph).
•
All settings can be changed comfortable and easy by a 3-key operation without additional
assistance with tactile feedback.
The device includes numerous functions to the adaption to nearly each measuring task:
•
The interference echo suppression function ensures that interference echoes (e.g. from edges,
welded joints and installations) are not interpreted as a level signal.
•
Integrated unit conversion
•
Peak value memory minimum – maximum
•
Error memory for fast failure analysis
•
Various flexible switch functions
•
Error indication function to switch output, current/voltage output and display
•
Simulation of the switch outputs and the current/voltage output
In the internal ring memory more than 500.000 measuring values can be recorded durable.
At the data logger function these measuring values are marked with a battery powered time stamp.
By the Bluetooth interface recorded measuring values can be downloaded.
Summary of Contents for Sonicont USN4SP
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