The DSA3200 series pressure acquisition systems represent the next generation of multi-point electronic pressure scanning. Model DSA3217/3218, Digital Sensor Array, incorporates 16 temperature compensated piezoresistive pressure sensors with a pneumatic calibration valve, RAM, 16 bit A/D converter, and a microprocessor in a compact selfcontained module. The result is a network ready intelligent pressure scanning module.
The microprocessor compensates for temperature changes and performs engineering unit conversion. The microprocessor also controls the actuation of an internal calibration valve to perform on-line zero and multipoint calibrations. This on-line calibration capability virtually eliminates sensor thermal errors with a long term system accuracy of ±.05% FS.
Pressure data are output in engineering units via Ethernet using TCP/IP protocol.
Scanivalve offers an optional multi-range calibration. This allows the DSA modules to have multiple pressure ranges. The calibration valve and transducers are manifolded in groups of 8. The user can specify up to 3 pressure ranges within that group of 8 as long as the ratio for all 3 full scale ranges doesnt exceed 3:1 from highest to lowest range.
Applications
The DSA3217/3218 Digital Sensor Array is ideal for flight and turbine engine testing applications, where ambient temperatures vary. It is also ideal for industrial pressure measurement where long calibration intervals are required or temperatures can vary greatly. The DSA temperature compensated pressure sensors are more than ten times less sensitive to temperature than typical piezoresistive pressure sensors. They are not attitude sensitive, so the units may be close coupled to the pressure sources to be measured. When further temperature stability is required or for use below 0°C, it is recommended that the Model DSA3218 be used. The Model DSA3218 is basically a DSA3217 installed in an insulated, environmental box. All Px input and control pressure fittings are 1/8 inch Swagelok® fittings. Optional DSA3218 fittings are 1/16 and 1/4 inch Swagelok® fittings.
