Burkert Type 8175 - Manual (Page 132)

64
8175
ENGLISH
INFORMATION
6.4 DESIGN AND MEASURING PRINCIPLE
6.4.1 Design
The ultrasonic level transmitter 8175 compact combines an ultrasonic sensor and a trans-
ducer with display.
Alternatively the 8175 wall and panel versions integrate the ultrasonic sensor 8170 to provi-
de a remote version.
The output signals are provided via a connector or two cable glands.
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 bet-
ween emitted and received signal is measured with high accuracy and converted in distance
(or volume) by the internal microprocessor.
The level transmitter or sensor 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, granulas etc.
6.4.3 Signal Output
The 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)