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Testing Methodology for High School Category:

Ozone testing will be done on three consecutive days beginning on the first and third Wednesdays of every month. Participants may choose to perform 1-5 ozone tests simultaneously on the same day (one test in each testing site within the quadrant). All ozone tests will be one hour tests, between 11am and 2pm.
Atmospheric tests will be done concurrently with the ozone testing, at the center of the test quadrant. They are to be taken each day of the testing period, between 11am and 2pm. If the participants happen to be G.L.O.B.E. teachers, they may choose to use their G.L.O.B.E weather station as the center of their test quadrant. Teachers may choose to test for any or all of the following atmospheric conditions as they relate to ground level ozone:

temperature

time of day

amount of light

wind speed and direction
barometric pressure
percent humidity
precipitation
percent cloud cover
tropospheric ozone
visibility

Testing Protocols:

The following protocols are recommended for the grade level given. You know your own students' abilities and supplies available, so the ultimate decision about the level at which they collect data will be up to you, the teacher.

Recommended High School Category:
    Materials Needed:
        CBL                                            TI-82 or 83 calculator
        DIN adapters                              link cable
        CHEMBIO program                   relative humidity sensor
        connector cable                           barometric pressure sensor
        temperature probe                       light probe
        watch                                          anemometer
        rain gauge                                    directional finding compass
        Optional ozone testing devices:
                             Ecobadges
                             Schoenbein Paper (within the Science Teacher," Ground Level
                                Ozone Testing", Dec. '95)

Local Time used should be between 11am and 2pm.

Current Air Temperature reading, Relative Humidity reading and Light reading are to be done with the temperature probe, relative humidity sensor and light probe from a location as close to the center of the testing quadrant as possible, as long as there is no shade falling on the probes during the testing time. Allow the probes to remain in place until there are no fluctuations in the readings. Temperature, relative humidity and light readings are to be taken each day of the testing period, between 11am and 2pm. Temperature, relative humidity and light probes may be hooked up simultaneously to the CBL. See directions below for doing these data collections.
You will enter your data for current air temperature in degrees Celsius (c).
You will enter your data for light in lumens (lux) or foot candles (fc).
You will enter your data for relative humidity in percent (%).
NOTE: If you are a G.L.O.B.E. participant, you may use your weather station location and it is recommended that your students collect the current air temperature both using the G.L.O.B.E. equipment and protocol, and using the CBL temperature probe and do a comparison.

To use the CBL and TI-82, 83 follow the directions below.

Connect the TI-82, 83 with the link cable using the port on each unit.
Firmly press the cable ends into each port.
Connect the temperature probe into channel 1.
Connect the relative humidity sensor with DIN adapter into channel 2.
Connect the light probe in channel 3.
Turn on the CBL unit and the calculator.
Start the Chembio program and proceed to the MAIN MENU.
Set up the calculator and CBL for the probes and sensor.
Select SET UP PROBES from the MAIN MENU.
Select TEMPERATURE from the SELECT PROBE menu.
Enter 1 as the channel number.
Select USED STORED from the CALIBRATION menu.
Select MORE PROBES from the SELECT PROBE menu.
Select RELATIVE HUMIDITY from the SELECT PROBE menu.
Enter 2 as the channel number.
Select USED STORED from the CALIBRATION menu.
Select MORE PROBES from the SELECT PROBES menu.
Select LIGHT from the SELECT PROBE menu.
Enter 3 as the channel number.
Select USED STORED from the CALIBRATION menu.
Wrap all the probes together so they are manageable.
Set up the TI-82, 83 and the CBL for data collection.
Select COLLECT DATA from the MAIN MENU.
Select MONITOR INPUT from the DATA COLLECTION menu.
Be sure the light probe is pointing directly at the ground for every measurement. Extend arm holding probes so probes are approximately one meter from your body (and avoid shadows from your body falling on the ground being monitored).
Allow readings to stabilize. Record the values displayed on the calculator screen.
When reading is complete, press + and select QUIT from the MAIN MENU. Press 2nd and then OFF to turn off the unit.

Precipitation readings are to be taken with a rain gauge over a 24 hour period, each day of the testing period. The gauge is to be placed as close to the center of the testing quadrant as possible, as long as buildings do not interfere in any way with an accurate accumulation of moisture. (There must not be any run-off into the gauge.) Again, if you are a G.L.O.B.E. participant, you may use your weather station data. Enter your data in centimeters of liquid precipitation.

For Tropospheric Ozone Level readings using the Ecobadges, the filter papers may be cut in half before use. For the Ecobadge filter papers, attach the filter paper to a fixed object outside in area(s) you have designated within your testing quadrant. (The number of testing sites you entered on your Demographic Data Entry form determines the number of filter papers you place within your quadrant.) The filter papers need to remain in fixed locations for exactly one hour, then collected and compared to the color chart provided by the manufacturer of the ozone badges. The papers are to be placed at predetermined locations within the quadrant. One paper must be located as close to the center of the testing quadrant as possible. Record date, time and exposure level on the back of the filter paper(s). Enter your data in parts per billion.
Note: All eco filter papers must remain dry! Store the unused filter papers in double sealed vinyl bags to avoid color changes prior to use. Store the exposed filter in one of the slots found on each side of the inner pouch of the plastic sleeve that came with the filter papers.

For Tropospheric Ozone Level readings using the Schoenbein papers, place papers to a fixed object outside in area(s) you have designated within your testing quadrant. (The number of testing sites you entered on your Demographic Data Entry form determines the number of filter papers you place within your quadrant.) The filter papers need to remain in fixed locations for exactly one hour, then collected and compared to the Schoenbein Color Scale and evaluate results by doing the Observation and Analysis section on your link. Compare the Schoenbein number to the relative humidity using the Relative Humidity Schoebein Color Chart Scale and record in parts per billion.

Barometric Pressure readings are to be taken using barometric pressure sensor, TI-82, 83 and CBL. Do the following.

Connect the CBL and TI-82, 83 with the link cable using the port on each unit.
Firmly press the cable ends into each port.
Connect the barometric pressure sensor with DIN adapter into channel 1.
Turn on the CBL unit and the calculator.
Start the Chembio program and proceed to the MAIN MENU.
Set up the calculator and CBL for the probe and sensor.
Select SET UP PROBES from the MAIN MENU.
Select BAROMETRIC PRESSURE from the SELECT PROBE menu.
Enter 1 as the channel number.
Select USED STORED from the CALIBRATION menu.
Select MM (millimeters) of HG (mercury) as the barometric unit, although most weather reports are given in inches of mercury.
Set up the TI-82, 83 and the CBL for data collection.
Select COLLECT DATA from the MAIN MENU.
Select MONITOR INPUT from the DATA COLLECTION menu.
Allow readings to stabilize. Record the values displayed on the calculator screen.
When reading is complete, press + and select QUIT from the MAIN MENU. Press 2nd and then OFF to turn off the unit.

Wind speed and Direction readings are to be done with the anemometer and a directional finding compass. The location for these tests must be in an open area as close to the center of the testing quadrant as possible, away from overhead power lines and away from the face of a building, since these will interfere with the testing devices. Wind speed data will be entered in kilometers per hour, so conversions may be necessary. To determine the direction of the wind, rotate your body slowly, while holding the anemometer at arm's length. When the greatest wind speed is detected, stay in the same position, exchange the anemometer for a directional-finding compass and hold it at waist level. Adjust the dial on the compass as needed. Record the direction of the wind in degrees. Further indicate if the wind is coming from the N, NE, E, SE, S, SW, W, or NW.
Note: When using a directional-finding compass, remove heavy metal buckles or turn them to the back. Also, remove any jackets with heavy metal zippers, etc. that might interfere with the magnetic field.

Percent Cloud Cover determination is to be made from an open area where your field of view is not obstructed. You will not need the horizon in view for this observation. Look overhead and determine the amount of cover that the clouds provide. You will decide if the sky is clear with 0% cloud cover, scattered up to 50%, broken from 50% to 99% (nearly completely overcast with some beams of light or blue sky showing), and overcast at over 99% (completely overcast with no blue sky or beams of light penetrating). Enter your data in percentages: 0% cloud cover, 1%-50% cloud cover, 51%-99% cloud cover, or 100% cloud cover.

Visibility readings are to be done from the testing site at the center of the quadrant, with an open, horizontal field of view- even from above ground level if possible. To do the readings, someone must accurately determine in advance the approximate distance in a straight line from where the students will be standing to objects on the horizon. The objects' distance from the observer's location must be measured in kilometers. The teacher may find a map of the area with a mileage/kilometer scale helpful in deciding what landmarks she/he will use for this investigation. Students will determine if they are able to see the predetermined objects. The visibility data will be recorded in kilometers to the farthest object visible.
Note: It is probable that the horizon will not interfere with visibility up to a distance of 20 kilometers, provided the observer is on level terrain.

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