Operation; Air Velocity Measurements; Units Selection - Extech Instruments AN10 User Manual

Operation
Power
Press the Power
when prompted, check that a fresh 9V battery is installed correctly in the rear battery
compartment.
Air Velocity Measurements
1. Switch the meter ON using the power button.
2. Hold the probe so that the air enters the vane from the rear of the meter.
3. Read the air velocity measurements on the LCD.
Units selection
1. Switch the meter ON.
2. Press and hold the MAX‐AVG button for 2 seconds.
3. The unit of measure will step to the next unit of measure on the list below
4. Repeat step 3 until the desired unit of measure is selected.
Units of Measure List
M/S: meters per second
MPH: miles per hour
FPM: feet per minute
KNT: knots (nautical miles per hour)
KPH: kilometers per hour
MAX‐AVG Recording
1. Press the MAX‐AVG button momentarily to display the highest air velocity reading
(maximum) recorded. The reading shown will be the highest reading measured since the
meter was switched ON. The MAX icon will appear at the top of the LCD.
2. Press the MAX‐AVG button again to display the average of all air velocity readings (AVG)
taken since the meter was switched ON. The AVG icon will appear at the top of the LCD.
3. Press the MAX‐AVG button again to switch the display back to real time measurement mode.
The MAX and AVG icons will switch OFF.
4. To reset the record history, switch the meter OFF then back ON again.
LCD Backlight
The LCD backlight switches ON automatically when the ambient light dims below the threshold.
The ambient light sensor is located directly above the LCD window. To test the backlight, cover
the ambient light sensor and the LCD backlight should immediately switch ON.
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button to switch the meter ON or OFF. If the meter does not switch ON
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