With WITT’s automatic calibration unit, the German company promises reduced operating costs and improved production of technical gases.

Martin Bender of WITT-Gasetechnik commented, “Every measuring and analysis device for technical gases must be calibrated regularly if it is to function accurately. An annual calibration is usually envisioned, but shorter intervals are recommended.” Indeed, with WITT’s latest device, not just regular, but automatic calibration is possible.

WITT advises pre-planning when considering such devices though, as retrofitting is not usually possible.

The importance of precision

Bender illustrated the significance of effective monitoring, he explained, “Even a minor deviation form the target concentration of a gas mixtures can lead to expensive extra consumption and defective production.”

“The comparatively low one-off costs of an automatic calibrating unit, which usually costs less than a single technician visit, are hardly significant in comparison,” added the expert.

Automatic calibrators in action

But how do these value-promising devices actually operate? One cylinder each of zero and calibration gas is connected to the analysis device. They remain there permanently and only have to be changed at very long intervals.
In the case of gas mixers, the zero gas is omitted as it is taken directly from the mixer. The actual calibration system, comprising three solenoid valves and a control, unit is also connected. This tests the gas system in freely definable intervals. As and when required, it calibrates automatically and indicates potential malfunctions in the display. Manufacturing firm, WITT attests, $quot;That means the user can play things safe: The gas system is always in the best condition, the test unit is amortised in the shortest time and qualified personnel are no longer necessary.$quot;