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    Casio EA100/EA200 data loggers

    This page suggests some ways of using the Casio EA100 and the newer EA200 Data Analyzers in the mathematics and science classrooms. They can both be used to collect data in the lab, classroom or field using a variety of probes (eg temperature, light, voltage, motion, etc). It can be set up to collect data by itself for subsequent download to a calculator (CFX, FX1.0/2.0 or FX7400 models) or controlled completely by one of these calculator models.

    Here are 3 math experiments (with programs) to try:

    • Experiment 1 - the swing of a pendulum (SHM) using a motion detector.
    • Experiment 2 - exponential cooling using a temperature probe.
    • Experiment 3 - the bounce of a ball (Geometric sequences and series) using a motion detector.

    Some science activities
    These science activities (in *.pdf format) were written by Brad Watson and myself for the Australian Casio Education Site (www.casioed.net.au). Note references to [probe(s)] and [program] and that it is possible to download this complete set of science investigations, including program instructions, as a 671Kb Adobe pdf file.

    General scientific method
    1. Which colour is safest? [Light probe] [GET DATA]
    When walking or cycling at night it is important that motorists can see pedestrians. Some clothes are safer to wear than others. The safest colours are those that reflect the most light. In this activity, students are given a light source, a selection of fabrics and a Casio Data Analyzer with probes. Their task is to rank the colours from most safe to least safe.

    Chemistry
    1. Latent heat of fusion of napthalene. [Temperature probe] [GET DATA]
    This investigation explores the change of state from liquid to solid of napthalene and identifies it's melting point.
    2. Lead-acid battery. [Voltage probe] [GET DATA]
    This investigation studies the lead-acid cell and in particular how the charging time affects the time taken for the battery to discharge.
    3. Acid-base reactions. [pH probe] [GET PH]
    This investigation studies the acid/base properties of the salts produced in 4 different titrations.
    4. Boyle's Law. [Pressure probe] [GETDATA2]
    This investigation studies the relationship between the volume and pressure of a gas and how this relationship relates to the kinetic theory.
    5. Constant volume law. [Temperature and pressure probes] [GETDATA2]
    This investigation studies the relationship between the temperature and pressure of a fixed volume of gas and how this relationship relates to the kinetic theory.

    Physics
    1. Conduction of heat. [Two temperature probes] [GET DATA]
    This experiment compares the relative thermal conductivity of steel and copper. Two temperature sensors attached to the ends of metal samples are used to monitor how the temperature varies as heat moves along each metal.
    2. Solar cell. [Voltage and light probes] [GETDATA]
    This experiment investigates how the intensity of the incident light affects the voltage output of the cell.
    3. Speed of sound. [Microphone] [GETDATA2]
    This investigation measures the time between a sound and it's echo and hence allows an approximation to the speed of sound in air to be calculated.
    4. Sound waves. [Microphone] [GETDATA2]
    This experiment investigates sound waves using graphical analysis.

    Biological sciences
    1. Energy release by yeast. [Temperaure probe] [GETDATA]
    This experiment sets out to investigate the amount of energy released through monitoring the temperature of a solution of sugar in water to which dried bakers yeast has been added.
    2. Respiration of carbon dioxide. [pH probe] [GET PH]
    This experiment sets out to confirm that one of the constituents of exhaled air is carbon dioxide, and goes on to examine the effect of exercise on the amount of carbon dioxide in exhaled air.
    3. Effect of exercise on heart rate. [Heart rate monitor] [GETPULSE]
    This investigation examines the effect of exercise on heart rate, and in particular the relationship between fitness and the time taken for heart rate to return to resting levels.
    4. Difference of average heart rates. [Heart rate monitor] [GETPULSE]
    This investigation sets out to determine whether any difference exists between the resting heart rates of male and female students. Particular attention is given to the need for unbiased sample selection and control of other variables in the investigation.

    Programs
    The above all use one of the GET DATA or EA2 programs to organise data collection using a Casio CFX9850, FX7400+ or Algebra FX graphics calculator. You can read individual program hints in these pdf files:

    • GET DATA (EASY200) Instructions. This was the original, easy to use program, for data collection using the 3 probes supplied with the EA-100 data analyzer. If you are new to data logging with the EA-100 / CFX9850 calculator combination, then this is the program to start with.
    • GETDATA2 Instructions. This is the big brother to GET DATA, allowing the use of any type of probe, any combination of up to 4 probes, individual calibration or conversion equations for all probes and use of one probe to trigger data collection. Real time graph plotting is possible either against time or one probe against another.
    • GETPULSE (EA2PULSE) Instructions. This program is specifically for use with the Vernier heart rate monitor, allowing continuous monitoring and recording of an individuals heart rate using an ear clip.
    • GETPH (EA2PH) Instructions. This program is specifically for use with the Vernier pH system, allowing real time monitoring and graphing of the pH of solutions over the 0 to 14 range.

    Internet sites for more ideas are:

    • New link needed for ModularLogic: Robert Covey, has developed a program for direct communications between the EA-100 and PC’s running Windows. Pop over to California and have a try of the current beta version.
    • Build your own analog interface for the Casio calculator. This is a non-commercial site by Alberto Ricci Bitti and includes schematics, parts list, software, how the circuit works and details about the protocol used.
    • The Casio Classroom has a section on ideas for using the Casio data analyzer.
    • Saltire Scientific provides materials, sensors and associated software to make data-gathering a simple and reliable task for teachers.
    • Exploring With The Casio book of experiments (samples in PDF format) plus some programs in *.cat format.
    • Vernier Software are the manufacturers of several probes for use with graphing calculators.
    • PASCO Scientific create quality interfaces and sensors for science classrooms.
    • AccuLab Products Group has a complete line of Calculator Based Laboratory equipment including the SensorNet Science Program.

    Useful utilities for data handling
    A couple of programs you may like to try from the UCF Casio site in the US:

    • alpha.exe is a free (beta) program developed by Robert Covey of ModularLogic in California which allows for transmission of collected data from the EA100 directly to a Windows based PC in a tab delimited format. Then the data can be opened with any simple spreadsheet software. Read alpha.pdf for directions.
    • filter.exe is a program developed by John Dumas, an independent programmer, which takes Casio List files saved in the *.cat format and reformats and saves them in tab delimited format - easily opened with any spreadsheet. Read filter.pdf for directions.

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