LaserLiner MultiTest-Master Manual page 12

9 Wind speed/Air ow
The measuring device is capable of measuring wind speed or air
ow with the built-in fan wheel. The resulting measurements can
be output in various units. On the basis of these quantities, it is also
possible to measure volumetric ow.
After switching on the device, press the „Anemo" button. Press the
„Unit" button repeatedly to change the units: FPM (feet per minute),
knots, m/s (metres per second) and km/h (kilometres per hour). Press
the „Anemo" button again if you want to determine the volumetric
ow. Use the „Unit" button to switch between the units CMM (cubic
metres per minute) and CFM (cubic feet per minute). Firstly, measure
the ow opening area. Then you can set the measured area by pres-
sing the „Set" button and making the necessary adjustments with the
„Unit" (change position of decimal point), „Hold" (+) and „Illuminati-
on" (-) buttons. Press the „Set" button to con rm your entry.
Please observe the following application notices when deter-
mining wind speed/air ow:
– Avoid direct sunlight during the measurement process
– Place the device as close as possible to the source of the air ow
– Position the device parallel to the source of the air ow
– Use the MAX function to determine the point where the air ow
is greatest
By pressing the „Mode" button, you can get the device to display
the highest (MAX), lowest (MIN), average (AVG) or difference value
(DIF) in addition to the current measured value. As its name sug-
gests, the „HOLD" button enables you to hold the current measured
value.
Wind force m/s
0 0.0 to 0.2
1 0.3 to 1.5
2 1.6 to 3.3
3 3.4 to 5.4
4 5.5 to 7.9
5 8.0 to 10.7
6 10.8 to 13.8
7 13.9 to 17.1
8 17.2 to 20.7
9 20.8 to 24.4
10 24.5 to 28.4
11 28.5 to 32.6
12 > 32.6
12 GB
km/h
0
1 to 5
6 to 11
12 to 19
20 to 28 11 to 15
29 to 38 16 to 21
39 to 49 22 to 27
50 to 61 28 to 33
62 to 74 34 to 40
75 to 88 41 to 47
89 to 102 48 to 55
103 to 117
> 117
UNIT
UNIT
(
Knots
0
1 to 3
4 to 6
7 to 10 Gentle breeze
Moderate breeze
Moderate gale
56 to 63
> 63
SET
TEMP/%RH
MODE MODE
dB
HOLD
HOLD
) (+) (–)
Air ow
Description
Calm
Light air
Light breeze
Fresh breeze
Strong breeze
Fresh gale
Strong gale
Whole gale
Violent storm
Hurricane