SMAR LD290, Operation And Maintance Manual

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Introduction
III
INTRODUCTION
The
LD290 is a pressure transmitter for gauge and level measurement. It is based on a field-proven
capacitive sensor that provides reliable operation and high performance.
A liquid crystal display can be added to provide additional operation and local indication. Its
microprocessed
electronic circuit permits a total interchangeability with Smar’s capacitive sensors. It
automatically
corrects the sensors’ characteristic changes caused by temperature variations.
The
LD290 , besides the normal functions offered by other transmitters, offers the following
functions:
LOCAL ADJUSTMENT
– Adjust through magnet tool the lower and upper value, input/output
function, and indication.
Writing protection via hardware.
Get the best results of the LD290 by carefully reading these instructions.
Smar’s pressure transmitters are protected by U.S. patents 6,433,791 and 6,621,443.