HYDAC International AquaSensor AS 8000 Series, Operating Manual

Page: 13 / 32

AquaSensor - AS 8000 series
HYDAC Filtertechnik GmbH
en
Page 13
BeWa AS8000 3215331b en.doc 2007-07-12
4 Product description
The AquaSensor AS 8000 was developed for the continuous monitoring of free water in
hydraulic systems in %.
4.1 Function Description
The AS 8000 Sensor measures the deviation of the emulsion dielectric from the measured
values of the pure fluid components. This measured value is transmitted to the AS 8000
Control Unit and made available for further analysis at interfaces. The measured values can
be exported directly to a computer in a terminal program on an 4-20 mA interface, to an RS
485 interface, or to a relay contact for READY/ALARM.
4.2 Zero correction / Calibration
Zero correction calibrates the sensor to a dry mineral oil. To do this, dip the sensor in a
repository with a correspondingly dry reference oil and proceed with the zero correction as
described below.
The digital input (0 -1) can be occupied with a potential-free contact. After the contact has
been closed for 2 seconds, it can be opened, and the zero correction for sensors 1 and 2 can
take place. The zero correction can either be done by hand with a switch or with a PLC.
The zero correction should be done after installation, after an oil change in a lubrication
system, or after changing oil type, for example.