Altronics Pa2-o2 Performaire Portable Ultra Quick Response 1 Run Predictions on 2040-parts.com

Note: This item looks to be brand new. It comes with a new battery. I installed another battery and it powers up perfectly but I don't know anything about how it works to test it out.

Absolute barometric pressure, relative humidity, and the percentage of oxygen in the atmosphere through its state of the art electronic sensors. This information is transmitted into a microprocessor where density altitude, oxygen altitude, and predicted values are calculated and displayed to incredible accuracy through exact scientific equations formulated specifically for internal combustion engines (verified by authorities in atmospheric research).

Specifications:

• Live Weather Data Monitoring: Yes
• LCD Readout: Yes
• LCD Displays: Monochrome
• Backlit: No
• Reads Temperature: Yes
• Reads Barometric Pressure: Yes
• Reads Relative Humidity: Yes
• Reads Dew Point: Yes
• Reads Density Altitude: Yes
• Reads Oxygen Altitude: Yes
• Oxygen Sensor Included: Yes
• Measures Wind Speed: No
• Wind Direction: No
• Reads Air Density Ratio: No
• Reads Vapor Pressure: Yes
• Maximum Number of Stored Runs: 400
• Displays ET Predictions: Yes
• Low Battery Indicator: Yes
• Predicts Quarter-Mile ETs: Yes
• Predicts 1/8 Mile ETs: Yes
• Calculates Sea Level ETs: Yes
• Displays Throttle Stop Predictions: Yes
• Calculates Throttle Stop Ratio: Yes
• Horsepower Correction Feature: Yes
• Utilizes Run Completion: Yes
• Number of Separate Databases: 10
• Data Transmits to Pager: No
• Includes Pager: No
• Power Supply: 9 V battery
• Batteries Included: Yes

Features:

• Portable
• Ultra Quick Response
• Temperature
• Relative Humidity
• Absolute Pressure
• Dew Point
• Vapor Pressure/Grains Of Water (GOW)
• % Oxygen
• Density Altitude
• Oxygen Altitude
• Data Entry Keypad
• Large LCD Display
• Stores 400 Runs
• 10 Data Bases
• ET Prediction
• Last Air Sample Hold
• Run Completion
• Bad Run Detection
• Throttle Stop Prediction
• Throttle Stop Ratio
• Last Air Sample Hold
• 1 Run Predictions
• Wind Correction
• Multiple Variable Prediction
• Sea Level ET
• Downloading
• Data Analysis

A density altitude measurement can easily be off many hundred feet when considering a change in the percent of oxygen in the atmosphere. The optional oxygen sensing capability allows the PerformAIRE to measure the percent of oxygen in the atmosphere. By knowing the density and the percentage of oxygen in the atmosphere the PerformAIRE can calculate the exact amount of oxygen in the atmosphere, which directly relates to performance. The PerformAIRE computer contains a data base that allows for storage of runs and then uses this data to automatically predict ETs, Throttle Stop Settings, Jet Sizes, etc. The predicted values are continually updated with each new sample of air. The density altitude and oxygen altitude will automatically be stored with each run if an oxygen sensor has been installed. The stored runs are also tagged with a time and date stamp to allow for later referencing. The expandable data base is capable of storing hundreds of runs and will allow those runs to be stored in separate data bases, which can be labeled for specific cars or tracks. The PerformAIRE V6.0 is packed with the same prediction capabilities as the original PerformAIRE, but also allows for 1 run predictions with preset and user defined ratios, multiple weather variable predictions (density altitude, oxygen altitude, air density ratio, correction factor, dew point, and vapor pressure), and corrects prediction for wind effects, which are customizable. The PerformAIRE computer's data base can be downloaded into a PC. One click of a mouse can download the data directly into a spreadsheet where the runs will be automatically charted showing a visually relationship between your cars performance and the changing atmosphere. This allows for the easy removal of bad runs from a database and more accurate predictions.
Besides all the added features and ease of use, there is one main reason why the PerformAIRE air quality computer is superior to all other weather stations/calculators. First one must ask themselves, what is the most important capability a weather station must possess. Hope you would answer the ability to accurately and repeatedly measure the atmosphere one is racing in. A weather station without this quality is useless. Detecting small changes in the atmosphere or using inaccurate measurements can be the difference between winning and losing. As little as a 100 foot change in density altitude can noticeably change the performance of an automobile. Most racers do not realize that a minor change in the atmosphere can equate to a major change in density or oxygen altitude. On average, a 1degree change in temperature, a 0.1 inHg change in pressure, a 10% change in humidity, or a 0.1% change in oxygen can be more than a 100 foot change in altitude. Instruments being used in other weather stations have variables that make it impossible to measure the atmosphere at a level needed to predict the performance of a racecar. These inaccuracies can stem from a persons inability to correctly distinguish what the instrument is reading, the effect temperature has on the instrument, and the instruments accuracy/repeatability ratings.