Ref: REFLEX/SCANFLEX MANUAL
EDITION 1: JULY ’97 1
REFLEX/SCANFLEX
PROGRAMMABLE LEVEL CTROL SYSTEM
INTRODUCTION
The REFLEX/SCANFLEX Programmable Level Controller is capable of monitoring the level
of liquids, powders and solids in vessels up to 50 metres deep, depending on the type of
material they contain.
The instrument is programmed by the user, who can select either;
Single point monitoring (REFLEX mode) for one transducer or
Multipoint monitoring (SCANFLEX mode) for up to 10 transducers.
The REFLEX/SCANFLEX will operate with either short range transducer of the RXV15
family or long range transducer of the RXM19 family.
The principle of operation of the REFLEX/SCANFLEX system is to use ultrasonic pulses
which are transmitted directly, or via a Multiplexor, to the transducer mounted at each
measurement point. Echoes are reflected off the surface of the material being monitored, back
to the transducer.
The time period between transmission and reception of the echo is directly proportional to the
distance between the transducer and the surface being monitored. A microcontroller computes
this time period for all echoes received and analyses them to determine which is the correct
reflection from the material surface. It uses this data as the basis for giving control outputs and
displays in usable engineering units.
REFLEX/SCANFLEX is capable of the following functions:
Level Measurement
Volume Measurement
Distance Measurement
When used as a REFLEX single point instrument the controller is connected directly to the
transducer.
When used as a SCANFLEX in its multipoint mode the controller is connected to the
transducers via a Multiplexor. Additionally, relay and analogue output modules can be added
to the system and individually programmed for each point.
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