6 HD350-en-GB_V3.4 2/19
Air Duct Properties (for Air Flow Measurements)
Air Duct - Unit of Measure:
1. Press and hold the SETUP button for two (2) seconds to enter the Setup mode. The SETUP
display icon will appear.
2. Use the arrow keys to scroll to the UNIT display.
3. Press the AVG REC at the
bottom of the LCD in relatively small digits.
4. Use the arrow keys to change the unit of measure.
5. Press the AVG REC button to save the setting. Continue with Step 6 below to set the shape
and size of the duct.
Air Duct Shape:
6. Continuing from Step 5 above, press the AVG REC button to show the rectangle or circle
shape.
7. Use the arrow keys to select the shape that matches the air duct in question (rectangular or
circular duct)
8. Press the AVG REC button to store the setting and proceed to Step 9 to enter the air duct
area.
Air Duct Area (W x H) for Rectangular Ducts:
9. Continuing from Step 8 above. Skip to Step 18 for Circular ducts. For rectangular air ducts,
nd a
5-digit number directly below. The 5-
10. Use the arrow keys to move the decimal to the desired position
11. Press the SAVE CLEAR button to move the display cursor to the right-most digit. The right-
most digits will flash indicating that it is ready to be changed if desired.
12. Use the arrow keys to change the value of the right-most digits in the range of 0 to 9.
13. Use the SAVE CLEAR button to move to the next digit and change its value if desired using
the arrow keys. Continue in this manner until the duct width edit is complete.
14. Press the AVG REC button to store the Width value and move to the Height (H) editing
procedure.
15. Edit the Height value in the same manner as the Width value.
16. Press the AVG REC button to store the Height value.
17. Press and hold the SETUP
display icon will switch off.
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