General Tools and Instruments DAF4000 - Manual (Page 11)

7. Mode for measuring instant wind speed with current altitude DAF4000
IMPORTANT ! This instrument calculates altitude by using air pressure. It is therefore quite normal for the
altitude to change when the air pressure changes. For this reason the instrument needs to be calibrated as often
as possible.
Choice of the unit :
By keeping the button pressed for approximately 4 seconds, the units start to go past. You can choose between the
following units : m (metres) and ft (feet). When the unit of your choice appears, release the button, and the unit of
measurement is thereby validated and the instrument returns to the mode of measuring the instant wind speed with
display of the altitude.
Display of the maximum altitude :
Hold the button pressed down for approximately 2 seconds and at the moment when the indication is displayed, release the
button; in this way the instrument goes into the mode for measuring the instant wind speed with display of the maximum altitude.
In order to quit this mode press once on the button. The instrument then returns to the wind/altitude mode.
Calibration of the altitude :
Hold the button pressed down for approximately 3 seconds, and when appears in the large digits, release. Hold the button
pressed down to increase the figure for the altitude in steps of 1 unit. To reduce the same, release then once again hold the
button pressed down.
A brief pressure on the button validates the new altitude.
Deletion of the maximum :
The maximum is retained even when the instrument is off. To delete the figure for the maximum, hold the button pressed down for
approximately 2 seconds, then release it. This operation should be carried out after the mode of display of the max. altitude.
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