Extech Instruments AN340 User Manual page 10

DIAMETER (Area) Mode
 When the 'D' is shown at the top of the LCD, the meter is ready to accept a circular duct's
Diameter in centimeters or inches.
 Use the button ONLY to change the value of the flashing digit (pressing the down arrow
will cause the screen to change from Diameter to Area). Use the ENTER button to move from
digit to digit.
 When finished entering the Diameter, and with the right‐most digit flashing, press the ENTER
button to return to the main operating mode.
 The meter automatically calculates the area of the duct and, when volume measurements
are taken, the LCD will show accurate air volume (flow) in CMM/CFM units.
Entering the AREA Value Manually
 When the 'A' is shown at the top of the LCD, the meter is ready to accept an Area value
directly in square centimeters or square inches (cm
from the Air Volume measurement mode to access the 'A' screen if necessary.
 Use the button ONLY to change the value of the flashing digit (pressing the down arrow
will cause the screen to change from Area to Length). Use the ENTER button to move from
digit to digit.
 When finished entering the Diameter, and with the right‐most digit flashing, press the ENTER
button to return to the main operating mode.
 Now when volume measurements are taken, the LCD will show air volume (flow) in
CMM/CFM units.
Shop for Data Logging products online at:
2
or inch
10
DataLoggerStore
www.
2
). Note: Use the LW‐D‐A button
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