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Measurement Of Average Wind Flow
Press the "VEL/FLOW" key to get into "FLOW" mode;
Once again press the "OPTION" key exit to measure-
ment of average wind flow.
Average Wind flow calculate formula
Flow =1/N
∑
(Velocity)*(free Area)
Note
The average vaule only displays by pressing NEXT
key ,if there is wind in the duct Area ,then the LCD
Screen will shows the measured Average Wind flow
Aim the vane at certain point of duct area properly,
press the "NEXT" key, on the right bottom of the LCD
will show serial number, in the meantime you can take
measurement of the first group wind flow values.
As shown in following figure:
Then select another test point, press the NEXT key to
take measurement of the second group average wind
flow values.
Repeat above steps to measure as many as 12 groups
of average wind flow values. As shown in following
figure:
Select your desired unit by pressing the UNIT key,for
example: select CMM for wind flow unit,
2
M for area unit;
Press the "AREA" key, letter on the LCD will disappe-
ared at this time you can input duct area, such as 1.6,
press "ENTER" key confirm;
Press again the "OPTION" key to select "AVG", here the
LCD screen as shown in following figure:
