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1. INTRODUCTION
Series 500 absolute/gauge pressure transmitters are intended for
applications across a wide range of processes from ultra low to medium
pressure duties.
Different constructions and materials are available to suit a particular duty
The measurement principle is based on a precision rated diaphragm
and linear variable differential transformer (LVDT) combination.
On all models the pressure chamber houses a rated pressure element
to which the process pressure is directly applied. Backing plates are
provided to protect against pressure overloads.
The pressure element is attached to a ferro magnetic core which is located in
the centre (null point) of a high resolution linear variable differential
transformer(LVDT). When voltage is applied to the primary coil, any
movement of the core due to pressure on the measuring element develops a
voltage in the two secondary coils. The output signal from these two coils is
then conditioned within the transmitter electronics to provide a standard
process control signal output, which, using the adjustments provided, may be
set by the user to the process requirements.
2. SPECIFICATIONS - General
Mechanical
Electronics Housing: Stainless steel to IP65
Pressure housing: 316 St Stl
Diaphragm material: Hastelloy C, / St Stl./ Inconel (model
dependant)
Process connections: refer to model coding
Electrical connections: Standard DIN type connector.
Electrical
Maximum error: +/- 0.25% (including the effects of
non-linearity and hysteresis
Range adjustment: 30 to 100% of nominal input range
Zero adjustment: +/- 20 % of nominal input range
Signal output: 4 to 20 mA dc 2 wire
Power supply: 9 to 32 V dc
Performance
Operating temperature: -20 to +100 deg C
Temperature effect: Better than 0.02% FS per deg C
Humidity: 0-95 deg C RH non-condensing
For Models, Input ranges, overload capabilities and arrangements see the
following model code table:
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