Extech Instruments AN340 User Manual page 4

MODE button
Momentary press to step through the available modes: air velocity, air volume, air temperature, relative
humidity, wet bulb temperature, dew point temperature.
AVERAGE, MAXIMUM, MINIMUM, and ENTER button
Press to view average/minimum/maximum readings. Also used to confirm (enter) a selection while
programming.
START, ESC button
In the normal operating mode, press and hold for two (2) seconds to start or stop the automatic datalogger.
Also, press to exit (escape) AVG/MIN/MAX, RECALL, and SETUP modes.
HOLD, UP ARROW button
In the normal mode, press to freeze/un‐freeze the displayed reading. It is also used to move UP in a menu list.
LW‐D‐A (LENGTH/WIDTH‐DIAMETER‐AREA) button
In the Air Volume mode, press this button to begin programming the AREA value for the duct under test. This
button is also used to move DOWN a menu list.
MEM‐RECALL button
In the normal mode of operation, press this button to manually record a reading into the meter's 99 location
memory. Press and hold for two (2) seconds to recall and review the manually recorded data one reading at a
time.
and
With the meter OFF, press and hold these two buttons to disable the sleep mode. Sleep mode switches the
meter off automatically after a twenty (20) minute period of inactivity.
and
With the meter OFF, press and hold these two buttons until PC appears on the LCD. The meter is now ready to
communicate with a PC. For instructions on the use of the PC interface please refer to the HELP utility provided
on the supplied CD‐ROM.
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