Getting Started: Before you begin working with CBL 2 and the DataMate software, you must connect the CBL 2 and your calculator.

START THE DATAMATE APP

Turn on the calculator
Press [APP].

3. Use the down arrow to select DataMate and press [ENTER].

The DataMate title screen appears briefly. Then the main screen appears.

CONNECT A SENSOR TO CBL 2

1. Connect the sensor to the channel 1. If you are using only one sensor, it should be connected to channel 1.

2. If the sensor is auto-ID, the channel number and sensor type automatically display on the Main Screen.

START THE DATA COLLECTION MODE:

For each Vernier sensor, DataMate loads a default experiment (data collection mode) appropriate for the sensor. The default data collection mode for all sensors is Time Graph which collects data points at a predetermined rate. If you close the DataMate program and then re-open it, the mode setting will be the same as when you closed it. However, if you exit DataMate in some other manner, the mode setting may be different when you re-open it. Or, you may open DataMate and find mode and sensor settings that are “left over” from a previous experiment. In any case, press [CLEAR] to return the mode and sensor settings to the default.

COLLECT DATA (TEMPERATURE EXPERIMENT) Practice Exercise:

Fill a beaker about half full of water. Place the temperature probe in the water. Obtain another beaker with ice. Follow steps 1 and 2 below to begin recording temperature of the water.

1. Check the DataMate Main Screen for the Mode setting. For this exercise it should read: Mode: TIME GRAPH-180 which means that the CBL will automatically take a temperature reading in ^oC every second for 180 seconds

2. To start your data collection, press [2](start) on the DataMate Main Screen. CBL 2 begins collecting data. In the TIME GRAPH mode, the data from CH1 is automatically graphed in real time as you watch. Values are shown in the upper right corner of the screen as the data is plotting. About 15 seconds after starting the experiment, add enough ice to the water to fill the beaker. Hold the themometer in the middle of the sample and stir frequently. The CBL will beep when it has finished the experiment.

To find a data point along the graph, press [TRACE]. Use the à and ß arrows to move along the line to find the coordinates of a given data point. Hit [ENTER] to return to the main screen.

Run the experiment a second time so that you collect data every 5 seconds for a total of 50 seconds. Use the section below [Select Data Collection Mode] to change settings.

SELECT DATA COLLECTION MODE

To change the Mode for collecting data or the TIME for which you want an experiment to run, return to the DataMate Main Screen.

Press [1] (setup) to move to the SETUP screen. To change either the MODE or the TIME, arrow down to MODE and press [ENTER]. To select the TIME GRAPH MODE, press [2]. The Time Graph Settings Screen will appear.

To change Time setting, press [2] (Change time settings). Instructions will ask you to:ENTER TIME BETWEEN SAMPLES IN SECONDS. Press[5] and [ENTER].

ENTER NUMBER OF SAMPLES: Press [10] and [ENTER]. The screen will record your new settings. If those are ok, press [1].

The next screen will remind you of the MODE you have chosen and will tell you the time needed for the new settings to collect data. If these are ok, press [1]to return to the DataMate Main Screen.You are now ready to do another trial. The new data will be put into L1 and L2 unless told to do otherwise.

Using the pH Probe

Set up the calculator and CBL as before.

COLLECT DATA (pH EXPERIMENT)

Practice Exercise:

Fill a beaker about half full of water. Place the pH probe in the water. Obtain another beaker with some baking soda. Record the pH before any baking soda is added(0 spatulas). Record the pH as you add sucessively add 1, 2, 3, and more baking soda. Follow steps 1 and 2 below to begin recording pH of the water.

1. Check the DataMate Main Screen for the Mode setting. For this exercise it should read: Mode: EVENTS WITH ENTRY which means that the CBL will take the pH each time you press [ENTER]. If the mode is not EVENTS WITH ENTRY, you need to change the Data Collection Mode. To do this: Press [1] (setup).

To change the MODE, arrow down to MODE and press [ENTER].

To select EVENTS WITH ENTRY MODE, press [3]. Check the MODE setting on this set-up screen. If it is ok, press [1].

2. To start your data collection, press [2](start) on the DataMate Main Screen. CBL 2 begins collecting data. In the EVENTS WITH ENTRY you will set the independent variable(in this case the # of small spatulas of baking soda added to the beaker) and then press [ENTER] to record the value of the dependent data(pH) measured by the CBL.

To do this: Before adding any baking soda, press [ENTER]. At this point the CBL has recorded the pH as the dependent variable. You are asked to enter the amount of baking soda added as the independent variable, in this case [0].

Add 1 small spatula of baking soda, stir and press [ENTER] and then [1].

Add a second small spatula of baking soda, stir and press [ENTER] and then [2].

Repeat the steps above for 3, 4, 5….spatulas of compounds .

When the pH does not change for several additions, press [STO] to stop. The data points will appear on the graph.

3. To find a data point along the graph, press [TRACE]. Use the à and ß arrows to move along the line to find the coordinates of a given data point.

Some questions to consider:

How did the pH change?

What is making it change?

Does it keep changing as you add more and more of the compound?

4. To quit the program, press [ENTER] and follow the steps to QUIT.