SMAR LD400 Operation And Maintenance Instruction Manual page 3

INTRODUCTION
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LD400 HART is a Smart Pressure Transmitter for differential, absolute, gauge, level and flow
measurements.
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Diferential Transmitter – LD400D and LD400H
This model measures the differential pressure applied in the sensor. Normally, both sides of the
sensor are connected to the process and if the selected output function is linear, the measurement
is the differential pressure. If the selected output function is a square root, the measurement is a
fluid flow.
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Flow Transmitter – LD400D and LD400H
The differential pressure is generated by an flow primary element and the square root function
supplies the measurement flow.
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Gauge Pressure Transmitter – LD400M
This model has the Lower Side Input connected to a blind flange and open to atmosphere.
Therefore, this model measures the pressure relative to atmosphere and the output function can be
linear or linearized by the linearization table.
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Absolut Pressure Transmitter - LD400A
This model has the Low Side Input connected to a blind flange and it is open to atmosphere.
Therefore, this model measures the pressure relative to local pressure and the output function can
be linear or linearized by the linearization table.
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Level Transmitter – LD400L
This model is available as a flange mounted unit with a flush diaphragm for direct installation on
vessels. Extended diaphragms are also available.
The LD400 series use HART
configuration softwares or others supplier. The local adjustment is enable for all the LD400 series.
With magnetic tools is possible to configure the zero and the span, to alter the measurement range,
to alter the unit of measured pressure, to select the square root function, to operate the totaled value
or in a control loop.
With the AssetView from Smar is possible to do the diagnoses management field's intrumented to
aid in the reative, preventive, predictive and proactive.
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technology. This instruments can be configured through Smar
Introduction
I