Model 451126 V2.0 6/08
5
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.
