15. D6-Thermo anemometer FVAD05-TOKx
Thermo anemometers are especially qualified for recording low air flows also in re-
stricted space conditions. The digital ALMEMO
®
D6 sensor features the primary mea-
suring channels (real measurable variables) flow and atmospheric measurement. The
flow velocity will be atmospheric pressure compensated via a standard atmospheric
pressure sensor (integrated in the ALMEMO
®
plug). As a result, the overall accuracy
of the measuring transducer is excellent. In addition, the measured atmospheric
pressure can be used as a reference atmospheric pressure in the ALMEMO
®
measuring
device.
15.1 Measuring ranges upon delivery
Designation
Range
Exp
Measuring range Dim
Resolution
1. flow, v 2.5 m/s
B-01
DIGI
-3
0,050 to 2.500 m/s
0.001 m/s
2. atmospheric pressure AP, p B-03
DIGI
-1
300 to 1100.0 mbar
0.1 mbar
The flow velocity of a thermo anemometer is inversely proportional to the atmosphe-
ric pressure (v=v
m
*1013/p
m
), which means that already 10 percent deviation (912
mbar) from the normal pressure result in a measurement error of 10 percent. Therefore
the D6 sensors are equipped with an atmospheric pressure sensor integrated in the AL-
MEMO
®
plug as standard. This atmospheric pressure sensor automatically serves for
atmospheric pressure compensation of the flow at all times even if the channel has
been deactivated. Alternatively, the atmospheric pressure can be manually entered in
the sensor menu and can be used as compensation pressure by switching from sensor
to manual.
15.2 Configuration on the PC via the sensor menu
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