Bedienungsanleitung Casio EA200 (Seite 41 von 55) (Englisch)

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Activity: Operating the EquipmentActivity: Operating the Equipment

MeasurementMeasurement

2-14-2

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Other Things To Do

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í Performing Preliminary Measurements

u Display the light intensity (or voltage) measurement result on

the calculator.

u Keeping the angle of the solar cell panel and optical probe

fixed, turn around until you find the direction where the

displayed value is at its maximum.

u Fix the solar cell panel and the optical probe so they are

pointed in the direction you determined above.

u Display the light intensity (or voltage) measurement result on

the calculator.

u Starting with the solar cell panel facing the ground, slowly

angle it upwards, until you find the angle that produces the

maximum measured value.

í Performing Main Measurements

u Fix the optical probe and solar cell panel so they are pointing in

the direction and at the angle you determined in the preliminary

step, above.

u Set up the EA-200 for long-term measurement, start

measurement, and then set the rain cover in place.

u After measurements are complete, study the correlation between

light intensity and voltage.

í Calculator Operation

u Use the optical probe (or voltage probe) to measure light intensity (or voltage) and display

the results on the calculator.

u Perform the following operation to set up the optical probe and voltage probe for long-

term measurement.

Using E-CON

Using a Calculator Program

Find the applicable program in the Program Library (P.2-16-4), input it into your calculator,

and then run it.

L : Light Intensity

V(V): Voltage

t (s):Time

1 Sun

2 Person Holding Equipment

3 Magnetic Compass

4 Direction of Turn

5 Direction Producing Maximum Value

The best time to perform the preliminary steps is noon. If it is hot or if there is the possibility that

the EA-200 might become too hot, place a shade over the EA-200 to block the sun.

u Consider why there is such a large change in measured values over a 24-hour

period.

u Consider why there are many changes in the graph over a comparatively short

period of time.

u See if the angle of inclination of the solar cell panel and the light intensity satisfy

the expression shown below.

L = L

max

cos(

–

max

)

L :Light Intensity

max

:Maximum Light Intensity Value

(°):Solar Cell Panel Angle of Inclination

max

(°):Angle of Inclination Determined by Preliminary Step

u Predict what changes can be expected throughout the year, and take long-term

(24-hour) measurements during different seasons to see what happens.

1 Sun

2 Ground

3 Zenith

4 Solar Cell Panel Surface

5 Direction of Turn

6 Angle Producing the Maximum Value

m“E-CON”w1(SETUP)c(Advan)

b(Channel)1(CH1)c1(CASIO)b(Volt)c1(LIST) 2w

c2(CH2)c1(CASIO)d(Light)c 1(LIST) 3ww

c(Sample)1(NO)c1(TIMER) 360wc1(NUM) 241ww1(START)

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