Dust Classes; Dust Class Pm10; Dust Class Pm2.5; Calibration - Kemper AirWatch Betriebsanleitung

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KEMPER AirWatch operating instructions - EN

6.5 Dust classes

In much the same way as for the particle data, where simply the total of all particles
is given, the collected measurement data is collated and shown in two classes for a
clear display of the dust loading.
These classes are also derived from the official and internationally applicable
classification for fine dust and are broken down as follows:

6.5.1 Dust class PM10

This dust class is equivalent to the German definition of so-called "E-dusts", i.e. the
fraction of the dusts that can be ingested. This embraces all dust particles from a size
of approx. 10µm.
As the international designation of this dust class is "PM10", all data connected with
this is rewritten with this designation both in the text and at the AirWatch itself.

6.5.2 Dust class PM2.5

This dust class is equivalent to the German definition of so-called "A-dusts", i.e. the
fraction of the dust reaching the lungs.
Other than what can perhaps be assumed from the designation, this class embraces
all dust particles from a size of 4µm. However, with this it should be noted that the
gravimetric values from 4µm to 2.5µm are subject to a weighting of 50%.
This means that values within this weighted range flow into this dust class with a
significance of only 50% and is justified in that the threshold for dust capable of
entering the lungs differs considerably from person to person – but is always in this
range.
In this case, the following is also true: As the international designation of this dust
class is "PM2.5", all data connected with this is rewritten with this designation both in
the text and at the AirWatch itself.

6.6 Calibration

The AirWatch sensor unit can be compared with a high resolution camera. Every two
seconds, a high resolution image of the air is produced and investigated by a
downstream digital electronics system for the size and count of the dust particles
contained in it.
With digital technology, calibration or so-called "zeroing" of the sensor is required
neither while running nor during the working life of the device.
Part no.: 150 2608 - 66 - Rev.: 00
Issue: 03/2017
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