Broadest measuring range in Denmark for vacuum calibration
Vacuum calibration from high vacuum and to atmospheric pressure makes our laboratory unique in Denmark. This benefits the Danish industry, as knowledge and resources are retained in Denmark.
Competitive measuring range within vacuumOur vacuum laboratory in Brøndby is accredited by DANAK for its wide measuring range within vacuum calibration. It covers an absolute pressure from 10μPa to atmospheric pressure, with an uncertainty down to 6μPa in the high vacuum range, and between 0,005 - 0,30% in the low and medium vacuum range.
The measuring range is thereby unique in Denmark, but with the accreditation, the laboratory obtains direct traceability to the international primary standard in Germany, making it competitive with foreign laboratories.
Vacuum is in high demand in pharmaceutical and food industriesVacuum gauges are most often used in freeze-drying processes.
In a freeze-drying process, pharmaceutical or food products are subjected to extremely low pressure in a freeze-drying cabinet, to extract the water from the product. The product is transformed into a dry state, with the potential to be powdered for medicinal or other use.
In a freeze-drying process, it is necessary to control the pressure of the freeze-drying cabinet, to make sure the products are freeze-dried correctly, which requires vacuum gauges calibrated in a wide range. As many freeze-drying processes take place at high vacuum, the extension of the measuring range is a much-appreciated development, as vacuum gauges can now be calibrated under the conditions corresponding to the industrial laboratories.
Kurt Jørgensen, who oversees calibrations at the Danish pharmaceutical company, Chr. Hansen, states:
“The new measuring equipment for vacuum at FORCE Technology gives a higher degree of precision in the calibration process, and thus a higher assurance of the precision in our production processes. Furthermore, the flexibility in completing tasks is increased by the fact that we can get the gauges calibrated locally, as the turnaround times can be kept down.”
Unique national standard
The wide measuring range and the DAKAK accreditation provide a unique national competence which strengthens Danish knowledge in the area, both academically and commercially – from which the Danish industry will benefit.
Academically, Denmark can now respond to a growing demand for knowledge in the field of vacuum calibration, and transfer it to the pharmaceutical and food industries in particular, but also to educational institutions and the manufacturing industry.
Furthermore, the calibration of vacuum gauges and working standards will become easier and quicker, as the calibration can be performed within Denmark’s borders instead of being sent abroad.
Do you want to learn more about vacuum calibration? Contact us – we would love to tell you more.
How does the vacuum calibration take place?
Calibration of a vacuum meter is performed by directly comparing one or more reference meters, which have measuring ranges that match each other in order to obtain the lowest uncertainty.
The calibration takes place in a set-up consisting of a calibration chamber with the purpose of exposing the reference meters and the vacuum meter to the same medium, a number of working and reference meters, pumps for evacuation of the chamber as well as a gas regulation system for adjustment of the vacuum in the chamber.
At FORCE Technology’s calibration chamber, there are 8 connection flanges at a common equatorial plane to which the vacuum meters, working and reference meters can be connected.
Calibration can be performed either statically or at stationary balance. It is the measuring range that determines which method to use.
As for static calibration, the pump valve is closed and gas is introduced into the calibration chamber until reaching the requested calibration point. When using the stationary balance method, the pump system valve remains totally open or partly closed and gas is fed into the calibration chamber until reaching the requested calibration point.