Fluke Calibration is pleased to announce the release of the improved Fluke 5900E which records lower uncertainties and longer plateaus in the measurement of triple-point of mercury (TPHg). The (TPHg) is one of the defining fixed points of the ITS-90 temperature scale and has an assigned value of –38.8344°C.It is indispensable in primary standards labs such as National Metrology Institutes (NMI), third-party primary calibration labs, research laboratories and universities, for the calibration of SPRTs below ambient which incorporate five ITS-90 sub ranges.
When it comes to manufacturing metal fixed-point cells, there are several factors that influence the cell’s ability to reproduce its assigned value with extremely low uncertainty. In short, it all comes down to the purity of the material used, but this can ultimately be affected by the manufacturing process.
5900E Highlights
Fluke Calibration achieves the lowest uncertainties commercially available in a mercury triple-point cell (0.2 mK, k=2) by further purifying the highest quality Mercury commercially available. Starting with mercury that is 99.999999% pure and by distilling it further under vacuum, any contamination that may have been introduced during handling is eliminated. The filling and sealing process is completed entirely in a closed system excluding all sources of contamination.
Each cell is supplied standard with a routine test including three plateaus represented graphically. The product also carries a 12 Month Warranty.
For more information on the Fluke 5900E, contact Comtest on 011 608 8520 or visit www.comtest.co.za <http://www.comtest.co.za>