User`s guide

451126-EN v2.1 07/13
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2/3Vmax Air Flow
1. Power the meter by pressing .
2. Press to select Air Flow. FLOW will display.
3. Press to select the desired units (CFM, CMM).
4. The previously stored area value will be displayed on the upper LCD display line. To enter a
new area value press . The lower display line will blank waiting for the user to program
new data. Use the numeric keys to enter a new area value in square feet. Press when
finished.
5. Press until the 2/3V MAX icon appears on the LCD.
6. Determine the direction of the air to be measured. Move the Vane around the center of the
area being measured to read the maximum air velocity. The meter will use the maximum
reading obtained to determine the 2/3MAX Air Flow.
Average Air Flow
1. Power the meter by pressing .
2. Press to select Air Flow. FLOW will display.
3. Press to select the desired units (CFM, CMM).
4. The previously stored area value will be displayed on the upper LCD display line. To enter a
new area value press . The lower display line will blank waiting for the user to program
new data. Use the numeric keys to enter a new area value. Press when finished.
5. Press until AVE appears on the LCD display.
6. Press to clear the upper LCD.
7. Select a measurement location. Once a point is selected and a flow measurement is
displayed, press to average the flow reading.
8. Select the next measurement location and press again to average the reading with
previous readings. The value in the upper LCD line will increment for each reading taken to
show how many readings were averaged. The max is 12 readings.
Data Hold
Press to freeze the reading. The display will hold and an 'H' will appear on the LCD.
Press again to return to normal operation.
MAX and MIN Measurements
1. Press to enter MAX mode. The meter will only display the highest reading.
2. Press again to enter the MIN. The meter will only display the lowest reading.
3. Press to exit the MAX or the MIN mode.