Normal Operation - General DLAF930S User Manual

If you choose "yES", after you press the REC/ENTER button the instrument will
prompt you to confirm that decision by displaying the term "Ent" below "yES" and
sounding three beeps. To confirm that you want to begin the erasure/formatting
procedure, press the REC/ENTER button. "Ent" will then flash several times and the
instrument will sound another three beeps to confirm that the SD card has been
erased and formatted.
Once the SD card has been set up, the display will then either return to the first of the
eight steps in the setup sequence—setting the current date and time—or show the
term "ESC". If "ESC" appears, press the POWER/ESC button to exit the setup
procedure and enter normal operating mode.

NORMAL OPERATION

1. To prepare to make measurements, power on the DLAF930SD and make sure
an SD card is firmly seated in the socket on the bottom of the meter.
The meter can make and display five kinds of measurements:
• Air speed and temperature (simultaneously)
• Air temperature and humidity (simultaneously)
• Surface temperature, as measured by an optional Type K or Type J
thermocouple
• Light level
• Sound level (using an optional sound level probe and plug adapter)
2. To select the measurement mode, use the FUNC./HOLD/NEXT button. Pressing
the button repeatedly cycles through the four main modes (sound level is
measured in a separate operating mode, as explained below). When the
FUNC./HOLD/NEXT button is released, the selected mode becomes the default until
the button is pressed again.
By default, the DLAF930SD uses Celsius units for temperature measurements. If you
wish to make Fahrenheit units the default, press the SET M button to enter the setup
procedure and perform Step 8.
3. To measure air speed and temperature simultaneously, seat the multi-function
probe plug (callout 1-21 of Fig. 1) in its socket (callout 1-7) on the top of the meter.
Then press the FUNC./HOLD/NEXT button until the display shows the term "An".
Holding the probe by its handle, turn its head so the anemometer vanes face the flow
of air. The upper part of the display will show the air speed while the lower part will
show the temperature (as "ºF" or "ºC").
To change the units of air speed, use the REC/ENTER button (which has the word
"Unit" stenciled below it). Repeated presses of the button cycle through the five options
for air speed units: m/s (meters/second), fpm (feet per minute), km/h (kilometers/hr),
knots (nautical miles per hour), and mph (miles per hour). Release the REC/ENTER
button when the unit you wish to use appears, making it the default until changed.
8