About Jasper

This author has not yet filled in any details.
So far Jasper has created 28 blog entries.

Buoyancy correction

The buoyancy correction is a correction to determine the true mass of an object on a balance if not in vacuum. A rock weighs less under water, and the same goes for weights in air compared to vacuum. When performing buoyancy correction for nanoflow measurement, the buoyancy correction becomes extra complicated, as effects of offset masses, [...]

2016-08-26T10:24:43+00:00December 6th, 2013|

Intercomparison between primary standards

Within MeDD various primary standards are developed for the calibration of infusion devices and flow meters. These standards, or calibration facilities, have been developed for liquid flow rates at ambient pressure and temperature. The flow rate range per standard varies somewhat; the combined flow rate range is between 1 nl/min up to 10 ml/min. Goal [...]

2016-09-12T14:47:55+00:00November 18th, 2013|

Some syringe pump characteristics

How would you like if your new syringe pump pumps like this? Here a 60 ml syringe with a rubber based plunger sealing is set to pump 15 ml/h. It takes 4 hours to empty the syringe. The set-up is degassed and has no compliance in the tubing, which otherwise would dampen the flow pulsations. [...]

2016-08-26T10:25:45+00:00October 25th, 2013|

Calibration and use of syringe pumps

Calibration and use of syringe pumps, Elsa Batista, Nelson Almeida, Eduarda Filipe, Anselmo Costa, in proceedings of 'Congrès international de métrologie', Paris, France, October 2013. Abstract. There are several types of infusion instruments used for drug delivery, e.g. syringe pumps and infusion pumps, with different capacities according to their use and applied therapeutic. In order to [...]

2016-09-12T14:49:11+00:00October 22nd, 2013|

Effectiveness oil based evaporation cover

DTI has evaluated the effectiveness of the oil based evaporation cover to lower than 5000 times compared to uncovered. At this evaporation rate it would take thousands of year for a simple glass of water to evaporate. But the twist is that it actually would gain in weight instead, from the amount of dust and [...]

2016-08-26T10:26:08+00:00October 22nd, 2013|

Standard uFlow rates CETIAT

The calibration facility of CETIAT has been presented at the third European Conference on Microfluidics: Microfluidics Conference 2012 (µFlu’12). Click here to read the proceedings of this presentation

2016-09-12T14:50:37+00:00June 25th, 2013|

Standard nFlow rates VSL

Click here to read about the first prototype for nFlow rates for gas flow rates. Click here to view a presentation on the design and realization of a primary standard for nFlow rates for water.

2016-09-12T14:50:00+00:00June 25th, 2013|

Standard uFlow rates IPQ

The standard for micro flow rates by IPQ has been presented at the 5th National meeting of the Portuguese society of metrology. Click here for the abstract and here for the presentation (Portuguese). The standard for micro flow rates by IPQ has also been presented at the 4th meeting of Portuguese quality researchers. Click here for the presentation (Portuguese).

2016-09-12T14:52:33+00:00December 7th, 2012|
Go to Top