Druck Tallis: The Perfect Partner on World Metrology Day
Conveniently timed with world metrology day Druck has raised the bar even further when it comes to accurately measuring pressure with a portable device by introducing the new PACE TALLIS.
Performance of this device is now on par with many traditional methods of pressure measurement such as deadweight testers or pressure balances but also delivers the benefits of a digital instrument in terms of useability and automation.
Arguably the biggest component of error in the uncertainty budget of a digital sensor based device is long term stability (drift). Many of the digital products in the market suffer from drift and require time consuming zeroing processes to be carried out to ensure compliance with the published specification. The sensors fitted inside a PACE Tallis undergo an extensive period of monitoring to ensure only the most stable sensors are released to market.
The example below shows how the TERPS technology within a Tallis barometer has remained within 20ppmFS of its original calibration after four years! This inherent stability is then utilized to allow for an automated onboard zeroing procedure for higher pressure ranges
Quantifying in physical pressure values
Quantifying this in terms of physical pressure values (Pascals considering its metrology day…) you can see that, in the following picture, six independent TERPS sensors all agree with one another with a maximum deviation of 9Pa.
Given that none of these sensors have been adjusted for over two years (only verified) ties in with just the Tallis drift specification alone of +/-15ppmFS per year (without even considering precision (NLHR) effects or the original calibration standard used.
When you compare a Druck PACE Tallis with a traditional deadweight tester the benefits are considerable:
Price
PACE Tallis is more cost effective to purchase, train staff to use and maintain as well as enabling application efficiency gains through automation
Measurement confidence
Users can rely on proven datasheet specifications over a wide temperature range as opposed to worrying about environmental conditions impacting measurement uncertainty, the effect of physical quantities e.g. local gravity or something that may seem trivial like piston cleanliness, but which can induce large errors
Overall cost of ownership
With a digital solution there is no need for expensive vacuum pumps, there is a lower risk of damage and reduced fees when shipping for calibration and no need for regular servicing.
Portability
PACE Tallis can be set up anywhere in the world and take pressure measurements after a short warm up cycle that cannot be matched by any other portable pressure calibrator.
Calibrating the Druck portfolio
Adding a PACE Tallis device to your installed base with up to three individual and configurable pressure sensing elements opens up the possibility to calibrate any Druck sensor, calibrator or competitor instrument.
Examples include:
- ADTS405R/F, ADTS 403
- PACE5000/6000 CM3 and below, PACE1000 IRS3 and below
- DPI6xx series and PM620, DPI705E
- UNIK5000, ADROIT6200
Technical Experts
Chris Roberts is an Experienced Product Manager with a demonstrated history of working in the Pressure and Oil and Gas Industries across a number of disciplines both domestically and internationally. A proven track record of value delivery through a dedication to understanding customer needs and leading and influencing people and teams.
Connect with Chris on LinkedIn
Tom Piggin is a Technical Sales Engineer with a background designing instrumentation used within the test & calibration sector
Connect with Tom on LinkedIn