The lab possess three 16-channel PSI 9116
units from Pressure Systems Inc with a 500 Hz sampling frequency. With a custom
calibration, the PSI-9116 unit provides a pressure measurement uncertainty of 0.1%
in the pressure range from 500 to 2500 Pa and an uncertainty of ±1 Pa in
the range from 0 to 500 Pa.
When the allocated space is limited,
miniature pressure scanners are used. The laboratory has two 32-channel ESP-32HD
digital miniature pressure scanners with a DTC-Initium unit from Pressure
Systems Inc. The two ESP-32HD units have a measurement range of ±2500 Pa and an
accuracy of ±1.5 Pa.
As a high-accuracy reference, four FCO 510 micromanometers
from Furness Control are used. There are two units with a 200 Pa measurement
range and two units with a 2000 Pa measurement range. The FCO micromanometers
are calibrated annually by a certified company. The accuracy of the manometers is
at least 0.25% of the reading and better than 0.025% of the measurement range.
A single FCO560 2000Pa is used for
calibration using its internal pressurising pump with an accuracy of 0.1% of the
reading + 0.003Pa.
A few enhanced FCO432 is used in the lab
for high accuracy pressure measurement.
For time-resolved pressure measurements, 10
Kulite sensors are available. A large amount of miniature single-channel absolute
and differential pressure transducers is available as well. The transducers
have a typical measurement error of 0.5-0.75% of the full scale.
All pressure transducers are currently
incorporated into an automated data communication and measurements protocol.