Calculating % Outside Air; Outside Air (Temperature) - TPI 1010 Manual

5. Calculating % Outside Air

HVAC systems use a combination of outside air, supply air, and return air to maintain
consistent and comfortable air quality. The 1010 can calculate outside air either by
measuring temperature or by measuring CO2.
The formula used to calculate % outside air is:
Percent outside air can be calculated using either temperature or carbon dioxide.

5.1 % Outside Air (Temperature)

To activate % outside air mode, press the
displayed in the middle display area.
1) Place the sensor of the 1010 perpendicular to the "Return" air flow. When the
reading stabilizes press the
"t-1" is displayed.
2) Place the sensor of the 1010 perpendicular to the "Supply" air flow. When the
reading stabilizes press the
"t-2" is displayed.
3) Place the sensor of the 1010 perpendicular to the "Outside" air flow. When the
reading stabilizes press the
"t-3" is displayed.
4) Press the
air will be displayed at the top of the display.
5) If you want to perform this measurement again, press the
return to step 1.
6) To exit and return to normal operation, press and hold the
is displayed. Press and hold the
returns to normal operation.
key and capture the return air temperature,
key and capture the supply air temperature,
key and capture the outside air temperature,
key, "t =" will be displayed and the calculated percent outside
key about 2 seconds until "t-0" is
key until a beep is heard and the 1010
key once and
key until "C-0"