ASLD2200 - Instruction Manual
1 Introduction
1.1 General
The ASLD2200 is designed to monitor the position of a sludge blanket in a settlement tank. The system uses an
infrared gap type sensor to search for and then track, the interface between the sludge and the water.
This information is then provided via both an LED display and a 4-20 mA output signal.
1.2 Output Signal
The ASLD2200 provides a 4-20 mA output signal that is proportional to the location of the top of the sludge blanket.
With a normal setup the 4mA value relates to the bottom of the tank and 20 mA to the water surface.
1.3 Limit Relay
The ASLD2200 provides a relay contact closure when the display reads 100% or 0% or both.
1.4 Manual Conventions
The manual has been written on the basis that the user has a basic knowledge of instrumentation and an
understanding of the type of measurement being made.
Training in the use of the ASLD2200 Monitor can be provided by Partech, please contact sales for further information.
103370IM Issue 10 Date 19/03/2018
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