To change the Imperial air speed measurement unit from
ft/m to miles per hour (mph) or knots, use the SEL: MPH
KNOTS button. Press the button once and the on-screen
display unit will change to mil/h. Press the button again and
the on-screen text will change to knots. Press the SEL: MPH
KNOTS button again to return to ft/m units.
Note: These display unit changes only remain in effect until
the meter is powered off. If you wish to use mil/h or knots as
your air speed units on a regular basis, you must make the
change from ft/m each time you power on the meter.
To hold a measurement, press the HOLD button. This
sounds the beeper, makes Hold appear on the top line of the
upper display, and “freezes” both the upper (air speed) and
lower (temperature) readings. Doing so makes it possible to
make a measurement in a dark place, hold it, and display it
later in a better-lighted area. To release the hold, press the
HOLD button again. This sounds the beeper again.
Note: Held readings are deleted when the meter is powered
off.
RECORDING AIR SPEEDS AT A SINGLE POINT
The DCFM8906 can record (store) air speeds at a single point
during recording sessions lasting up to two hours. Based on
these stored measurements, it can calculate and display:
• The average air speed over the duration of the
recording session
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