SMAR ld301, Operation And Maintenance Instruction Manual

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Introduction
III
INTRODUCTION
The LD301 is a smart pressure transmitter for differential, absolute, gauge, level and flow measurements.
It is based on a field-proven capacitive sensor that provides reliable operation and high performance. The
digital technology used in the
LD301 enables the choice of several types of transfer functions, an easy
interface between the field and the control room and several interesting features that considerably reduce
the installation, operation and maintenance costs.
The LD301 , besides the normal functions offered by other smart transmitters, offers the following
functions:
√√√√ ( ∆∆∆∆ P)
3
- used for trapezoidal weirs in open channel flow metering.
√√√√ ( ( ( ( ∆∆∆∆
P) 5 -
used for V-notch weirs in open channel flow metering.
TABLE - the pressure signal is custom linearized according to a 16-point table, enabling, e.g.,
conversion of level to volume of a horizontal cylindrical tank.
CONTROLLER - the Process Variable is compared to a Setpoint. The deviation acts on the
output signal according to a PID algorithm (optional).
LOCAL ADJUSTMENT - not Only for Lower and Upper value, but input/output function,
operation mode, indication, setpoint, PID parameters (optional) as well.
PASSWORD - three levels for different functions.
OPERATION COUNTER - shows the number of changes in each function.
TOTALIZATION - flow totalization into volume or mass.
USER-UNIT - indication in engineering unit of the property actually measured, e.g., level, flow or
volume.
Get the best results of the LD301 by carefully reading these instructions.
Smar’s pressure transmitters are protected by U.S. patents 643379.