Operating the fan anemometer
5.4 Determinating the air
quality
(only Wöhler FA 430)
A good air quality is decisive for the comfort of
persons. Therefore many new guidelines , e.g.
VDI 6022-3 and DIN EN 15251, are based on the
determination of the air quality. The Wöhler
FA 430 does not only determine the amount of
circulating air but it also determines the quality of
this air. According to VDI 6022-3 and DIN EN
15251 the humidity and the CO
2
are the most
important parameters. The Wöhler FA 430
measures these values and the volume flow at the
same time.
5.4.1 Measuring relative hu-
midity
(Wöhler FA 430 only)
Press the Up key until the relative humidity is
displayed in the top part of the display.
NOTE!
It is possible to set an offset value for the relative
humidity in the Setup menu, please refer to Chap-
ter 6.3.
5.4.2 Measuring the CO
2
concentration
(Wöhler FA 430 only)
Press the Up key until the CO
2
reading is
displayed.
NOTE!
When measuring at high altitudes, take the pres-
sure into consideration to obtain a precise CO
2
reading. Before beginning to take measurements
at high altitudes, enter the absolute pressure of
your location under position 4.0 in the Setup
mode; please refer to Chapter 6.4.
Press the HOLD/MIN/MAX key.
The readings in the top and lower parts of the
display are frozen.
To return to the normal Measuring mode,
press the HOLD key again.
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