Barometric transducers put through testing
An
Inertial Aerosystems UK product story
Edited by the Engineeringtalk editorial team
May 10, 2007
Tests carried out on a range of barometric pressure transducers, carried out by the Honeywell Solid State Electronics Centre, show excellent long-term stability.
Inertial Aerosystems has published the results of field trials with a range of barometric pressure transducers conducted by the manufacturers, Honeywell Solid State Electronics Centre.
The results show that with these rugged transducers, the long-term stability has proved better than anticipated.
This has been attributed mainly to the fact that proven silicon MEMS technology is used in the sensing element, combined with digital modelling.
These tests were concerned with accuracy, differential accuracy, resolution and drift.
A number of devices undertook an accuracy test at temperatures of 25, 55, -35 and -55C.
Readings were taken at 1inHg intervals between 17 and 32 inHg and repeated.
To pass each test the product should exhibit a root mean square error (RMSE) accuracy of less than 0.01inHg with all data points exhibiting a maximum error of less than 0.02inHg.
The results were 0.005inHg with maximum error of 0.01inHg.
Drift over time tests were conducted for a period of six months with the units under continuous power and monitored at ambient temperature and pressure.
Results were RMSE 0.006inHg, with a maximum error of 0.01inHg, all well within the required limits.
The barometer is one of a range of digital precision pressure transducers using common electronics and sensing elements specially adapted to meet applications in automated weather observation stations, observation balloons, and data buoys.
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