Signal Group, a UK-based manufacturer of gas analysers, has launched a new version of its Gas Divider, the Model 821S.
Designed for testing the linearity and calibration of almost any gas analyser, the 821S requires one calibration gas and zero gas in order to conduct a full range calibration check.
To conduct a reliable, accurate check, users need to connect the calibration gas, the zero gas and outlet flow connector to the analyser to be tested, and then switch the calibration gas in ten equal steps from zero to the full concentration.
“These steps are accurate to within 0.2% and a calibration certificate is supplied with each instrument,” said James Clements, Managing Director at Signal.
“Repeatability is 0.5% of the dilution step, and the European and US standard specify 2% accuracy, so if the 10% dilution is selected, 500ppm will be diluted to 50ppm with an uncertainty of 0.25ppm – significantly better than the +/- 1ppm required by international standards.”
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