Computech Systems RaceAir Pro - Computer Programs Operation

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Press and momentarily hold the POWER ON/OFF key. The computer will power up, show the
firmware version, and go to the ==Live== Fan OFF screen. When the fan is not operating, the
sensor readings will not be accurate. Press the SAMPLE key. The display will read
= Sampling… = until the sensor readings are stabilized - this may take a couple of minutes. Then
the display will read = Sampled Wthr = when the sensors have correctly measured an air sample.
Display Example: (use down arrow key to reveal more data)
= Sampled Wthr =
72.3 32 % 29.40" (temp  F humidity % barometric pressure Inches Hg)
Apr15 11:59:59pm (date and time)
STD Corr=1.0389 (HP correction factor selected: STD or SAE)
Dens Altd= 1686 (density altitude ft)
ADR= 95.2 (air density ratio %)
DryBaro= 29.139 (dry barometric pressure Inches Hg)
Dew Point= 40.7 (dew point temp  F)
Wet Bulb= 56 (wet bulb temp  F)
Vpr Prs= 0.257" (water vapor pressure Inches Hg)
Wtr Vpr=38.47Gr (water vapor grains)
Press Alt= 489 (pressure altitude ft)
The RaceAir Pro will put the current weather data in memory for automatic transfer into any of the
programs that use weather information. The air sample data will be lost if the unit is turned off.
The unit will also automatically turn off after 10 minutes of inactivity thereby loosing the air sample
data. Keeping a logbook record of run information and applicable weather information is
recommended.
COMPUTER PROGRAMS OPERATION
Air Correction Program.
This program is used to calculate weather data from keyboard entries of temperature, relative
humidity, and barometric pressure. Press ALT then AIR CORR. to start this program.
Display Example:
=== Air Corr ===
Temp? 71.0 (Enter temp  F)
Humidity? 31 (Enter humidity %)
AbsBaro? 30.24 (Enter barometric pressure Inches Hg)
STD Corr= 1.0079 (HP correction factor selected: STD or SAE)
Dens Altd= 630 (density altitude ft)
ADR= 98.2 (air density ratio %)
DryBaro= 30.000 (dry barometric pressure Inches Hg)
Dew Point= 39.1 (dew point temp  F)
Wet Bulb= 54 (wet bulb temp  F)
Vpr Prs= 0.241" (water vapor pressure Inches Hg)