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8175
ENGLISH
INFORMATION
6.4 DESIGN AND MEASURING PRINCIPLE
6.4.1 Design
The ultrasonic level transmitter type 8175 compact combines an ultrasonic sensor and
a transducer with display in a splash-proof plastic IP65 enclosure.
Alternatively the 8175 wall and panel versions integrate the ultrasonic sensor type
8170 to provide a remote version.
The output signals are provided via a connector or PG 13.5 / PG 9 (without relay) or
via two PG 13.5 / PG 9 (transmitter with relays).
Option: 2 additional relays, which limit values are freely adjustable. The relay 2
may be used for signal loss control.
6.4.2 Ultrasonic Technology
Ultrasonic sound waves are generated 8 times per second. Sound waves can move
with low attenuation in the air, but are reflected by any liquid or solid state surface.
Between two consecutive emissions, advanced signal processing techniques,
including air temperature adjustment and noise rejection ensures the return of the
echo signals. Time of flight between emitted and received signal is measured with high
accuracy and converted in distance (or volume) by the internal microprocessor.
The level transmitter or sensor types 8175 / 8170 are designed for liquid
level measurement. It is the user responsability to test the functionality of
the device for any other material such as powders, granuals etc.
6.4.3 Signal Output
The Type 8175 ultrasonic transmitter is powered with 18-32VDC or 115/230VAC and
features a 3-wire, 4-20 mA output. In addition the 3 A relay output can be configured
as an alarm or for automatic fill or empty operations.
6.5 STANDARD DELIVERY
From a standard delivery you should have received the following:
COMPACT VERSION:
● 1 8175 level transmitter
● 1 Instruction Manual (3 languages)
SEPARATE VERSION:
● 1 8175 level transmitter (wall or panel version)
● 1 8170 sensor
● 1 Instruction Manual (3 languages)
(If the transmitter has 1 or 2 PG13.5 connections you should additionally
receive 1 or 2 multiway seals depending on the version).
6.4
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