Static pressure in mmH2O
We have now also included all speeds and installation variants in the curve diagrams for static pressure, which allows a good comparison of the suitability of a fan on different radiators at different speeds. Of course, this graph again contains a slider to make it easier to read the values of the Y-axis. Instead of the three bars, there is now the complete course:
The measurement of the static pressure is carried out as usual as a differential pressure measurement. For this purpose, the special “bowl” is clamped so that it closes airtight. Here, too, of course, measurements were taken with borrowed, professional equipment and time-consuming calibrations were carried out at the industry partner. For this measurement, we use the 510i, a device from testo that we also purchased ourselves, and also collect the data wirelessly. Since a competitor is now trying to copy us, the angles in the following two photos are of course not quite right, because without knowing the exact dimensions of the hopper, a copy is virtually pointless and it also only really works quite accurately within a fairly small tolerance range. We also made comparative measurement series for this once again. In practice, the whole thing looks like the two pictures below.
The installation is trouble-free and the pressure receptacle now also closes perfectly thanks to a special seal. The rest is just a matter of calibration, which we have also done several times. It is unlikely to be much more accurate with semi-professional methods. However, especially in printing, errors are quickly possible, which above all are not immediately recognizable. Even if the deviations are small, we will measure all fans from the first tests again before the conversion and prepare them for the database.
But even the static pressure alone is not everything, because everything is always associated with noise, unfortunately…
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