Why do you have only 5 minutes? To extend battery life, the DAF3008
automatically powers itself off following any 5-minute period in which no front-
panel button is pressed.
DISPLAYING MAXIMUM, MINIMUM AND AVERAGE SPEEDS
The DAF3008 keeps track of the maximum and minimum (fastest and slowest)
and average air speed values recorded during a measurement “session”—the
time during which you measure speeds at multiple locations and/or speeds of
multiple devices. The session begins when you power on the DAF3008; it
typically ends 5 minutes after you finish making measurements with the
activation of the Auto Power Off (APO) function.
The value of being able to quickly determine the fastest and slowest fans of a
group, or the average of a group of fans, should be obvious.
To display the maximum, minimum or average
air speed
during a measurement session, briefly
press (but do not hold) the
SET/HOLD
button as
many times as necessary until the label of the
desired value (
Max, Min or Avg)
appears at the
left of the LCD (Fig. 2, Callouts G through I). The
figure at right shows the three available session
parameters in their selection sequence relative to
real-time measurement mode.
CALCULATING WIND CHILL INDEX
The DAF3008 can calculate the Wind Chill Index (WCI) using a complex formula
that takes into account its measurements of air speed and ambient
temperature.
To display the Wind Chill Index
, briefly press (but do not hold)
the
/WCI
button. The calculated wind chill value will replace ambient
temperature on the lower readout and the text
WCI
will appear in the lower left
corner of the LCD.
To resume showing ambient temperature on the lower readout, press the
/WCI
button again.
WCI
will disappear from the LCD.
Note: WCI values are invalid at wind speeds below 3 mph (264 fpm or
1.34 m/s).
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