Model 11-R
GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 36 von 83
2.15 PTFE filter
The sample air is suctioned through a PTFE filter after leaving the measuring cell. This filter serves as a
dust collector and can be used for gravimetric control of the optical measuring results (see Section 4.5
“Determining the gravimetry factor”). Microscopic and chemical analyses may also be performed on the
particles deposited on the filter. By sputtering with gold, the PTFE filters can be used for an electron
microscope analysis as well.
If the device is operated without a PTFE filter, dust gets directly into the pump in the device where it can
cause damage or total pump failure.
For the handling and disposal of used PTFE filters, see Section 1.8.2.
2.16 Laser warnings
A corresponding warning is found on the underside of the device. Please observe the general infor-
mation on handling lasers and laser radiation in Section 1-4 “Fundamental safety instructions”.
2.17 Sunlight warning
There is also a sunlight warning on the underside of the device. The device must not be exposed to
direct sunlight since this can cause damage.
2.18 Calibration label
Figure 2-8: Calibration label
Figure 2-20: Sunlight warning label
Figure 2-21: Calibration label
The calibration label on the underside of the device states the
month and year when the calibration expires. After expiry, GRIMM
Aerosol Technik no longer warrants the accuracy of the measure-
ments within the specified error limits. This also applies if the cali-
bration label is damaged or removed.
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