Relaxed measurement even under time pressure: with good tips and the right vacuum gauge
Vacuum measurement involves very low pressures and thus extremely small forces. A quick reminder: pressure is the force exerted by gas molecules on the vessel wall – in more precise terms, their impacts. The lower the pressure falls, the finer the mechanisms have to be, with appropriate sophistication of the instrument technology, in order to be able to measure these fine effects. However, even a high-precision vacuum gauge from the market leader Testo will become even more precise if you take on board the following tips for vacuum measurement:
- Zeroing the pressure sensor! Please never forget: before you start the evacuation of a system, it is absolutely essential for you to zero your measuring device for vacuum. This is the only way to ensure your vacuum measurement is correct – and your schedule.
- Oil on the sensor?Does your vacuum gauge operate with a high-precision Pirani sensor? Make sure that there are no contaminants such as oil on the sensitive, high-tech component. With such fine measuring ranges, the accuracy of the measurement results can be influenced by even the smallest irritations. In the event of a contamination, professionals can easily clean the sensor opening themselves with a few drops of rubbing alcohol.
- Digital vacuum:To make it clear from the start: there is no digital vacuum beyond the Google universe. Even a Testo digital vacuum gauge cannot locate a digital vacuum, let alone create one. A vacuum is a state of complete emptiness, which cannot be achieved on PCs or mobile terminal devices, at least from a technical perspective. Or to put it in physical terms: if the pressure for instance falls below 300 mbar during the evacuation of a refrigeration system and you remove pressure from the system molecule by molecule using a good vacuum pump, you achieve a low vacuum, with a very good pump even a medium vacuum, theoretically even a high vacuum and finally an ultra-high vacuum, if you leave quantum physics out of it. You will never achieve a digital vacuum. But smooth evacuation is possible when you rely on a digital vacuum gauge from Testo.