User manual

AN510-en-GB_V1.0 5/17
5
SET Function
(APO On/Off, Temperature Units and Air Flow Units Settings)
1. Press and Hold the ▼ button for 2 seconds. The yes or no APO display will appear:
2. Press the ▲ or ▼ button to turn the APO ON (YES) or OFF (NO).
3. Press the R button to save the selection.
4. The temperature units display will appear:
5. Press the ▲ or ▼ button to change the degree F or degree C units.
6. Press the R button to save the selection.
7. The Air Flow units display will appear:
8. Press the ▲ or ▼ button to select CMM or CFM units.
9. Press the R button to save the selection.
10. Short press the power button or wait approximately 10 seconds for the meter to return to
normal operation.
Setting Dimensions for Airflow Measurements
The area of the air duct in square feet or square meters must be entered to perform air flow
(volume) measurements. Remember to convert square inches or centimeters to square feet or
square meters for area measurements before continuing. See ‘Useful equations and
Conversions’ later in this manual for additional information.
1. Select Air Flow with the M button.
2. Press the SET button. F-2 (ft
2
) or m-2 (m
2
) will appear in the display depending on the air
flow units selected (CFM or CMM).
3. Press the ▲ or ▼ button to set the area in square feet or square meters in the display.
4. Press the R button to save the value.
5. With the area values programmed, measure air flow in the duct to obtain air volume
(CFM or CMM) readings.