PASCO Specialty & Mfg. ET-8593 User's Manual
Contents
1. A computer ZEIN 3 Energy Transfer Solar Introduction The Energy Transfer Solar box ET 8593 can be used for demonstrating the concept of solar heating including the greenhouse effect Equipment Description a Plastic Cover The clear plastic cover snaps onto the Solar box and acts as insulator to isolate and trap air inside reduce convection currents and demonstrate the greenhouse effect The cover is very transparent to visible light but not infrared light b Aluminum Plate The aluminum plate is painted a non reflective flat black that absorbs light very well The hot aluminum plate re radiates in the far infrared region and thus the heat energy 1s trapped under the cover The reverse side of the aluminum plate is not painted The plate can be flipped inside the box to study differences in solar heating and or cooling between the aluminum and black surfaces The aluminum plate can be removed to measure its mass The white plastic knob also serves as an indicator for the sun s angle When the sun is perpendicular to the aluminum plate no indicator shadow appears on the plate c Solar Box The Solar Box holds the aluminum plate and plastic cover On the side of the box is a rod clamp for mounting the box to a rod stand When mounted to a rod stand the box can be adjusted to the sun s angle d Thermistor Inside the Solar Box is a 10K thermistor for measuring temperature The thermistor cables a2. box while you are collecting data You might have to adjust the angle of the box during the run 6 Repeat step 5 with the plastic cover off WARNING To avoid Analysi s burns or bodily injury when heating the box do 1 Look carefully at both curves at the start of the run The slope rate of not overheat the box heating for the uncovered box should be larger than for the covered above 100 C and do not box Why touch either side of the aluminum plate or the 2 Which has the highest final temperature the covered box or the 9 thermistor contact uncovered box 3 Which curve has a more constant heating rate Why Part II Solar Heating Comparison Aluminum vs Black Surface Compare the aluminum side up to black side up with the cover on Which surface is a better absorber of energy Look at not only how fast the plate heats up but collect data long enough to look at the final temperature The black side should heat up much faster than the aluminum side but does the black side reach a higher final temperature Part III Cooling Comparison Aluminum vs Black Surface For both sides aluminum and black start with the plate hot Let it sit in the sun and then move the plate to the shade to watch it cool Which surface cools faster Which is a better emitter of energy Try cooling both with and without the cover on the Solar Box PASCOR Model No ET 8593 Energy Transfer Solar Experiment 2 Solar Const
3. 2 76 see MU A e a sate 18 970 11 4368 a e o ow e 20 4 1886 80 17 260 18 0 47 1886 _ 15710 5 om 8 IC ME 16 302 aes 14 320 o f ee TO 13 580 18 8800 52 e moo sm s 1 o 20 308 5 2 986 2 878 12 I EToTo Model No ET 8593 Energy Transfer Solar Appendix B Technical Support For assistance with the ET 8593 Energy Transfer Solar or any other PASCO products contact PASCO as follows Address PASCO scientific 10101 Foothills Blvd Roseville CA 95747 7100 Phone 916 786 3800 FAX 916 786 3292 Web WWW pasco com Email techsupp pasco com Appendix C Copyright and Warranty Information Copyright Notice The PASCO scientific 012 08428A Energy Transfer Solar Manual is copyrighted and all rights reserved However permission is granted to non profit educational institutions for reproduction of any part of the 012 08428A Energy Transfer Solar Manual providing the reproductions are used only for their laboratories and are not sold for profit Reproduction under any other circumstances without the written consent of PASCO scientific is prohibited Limited Warranty PASCO scientific warrants the product to be free from defects in materials and workmanship for a period of one year from the date of shipment to the customer PASCO will repair or replace at its option any part of the product which is deemed to be defective in material or workmanship The warran
4. Instruction Manual Manual No 012 08428A Energy Transfer solar Model No ET 8593 PASTORI ENERGY TRANSFER ST 0003 SOLAR I DL CY Sl 8 10101 Foothills Blvd Roseville CA 95747 7100 Phone 916 786 3800 e FAX 916 786 8905 e www pasco com Energy Transfer Solar Model No ET 8593 Table of Contents EQUIPMENT HAS fie cscee ose 4rce ts cos cersueenesdecscusy aes enoteaeessaseocwstaes 3 INIFOGUCHON rossonera pens 4 Equipment Description L bi 4 EQUIPMENT Setup lt 6 5 6 cc0seencssgccecawddaneaeelsasdansseskacsiaeescees 5 6 Suggested Experiments 0 cece cece cence ci 7 Experiment 1 Solar Heating and the Greenhouse Effect iii 7 8 Experiment 2 Solar Constant Advanced Lab ccssscsssssssssssssssssecssssecsssssessseessssessssccssseceessees 9 10 Sample Data Results 0 bi 11 Appendix A Temperature Resistance Conversion Table 12 Appendix B Technical Support 13 Appendix C Copyright and Warranty Information 13 2 PAS C Ci Model No ET 8593 Energy Transfer Solar Energy Transfer Solar Model No ET 8593 Equipment List Replacement Model Number 648 08412 650 065 648 08413 514 08366 PS 2000 Various See PASCO catalog PS 2125 or CI 6527A For ohmmeter see PASCO catalog Piece of cardboard 1 ft square
5. ant Equipment Required Energy Transfer Solar ET 8593 Temperature Sensor PS 2125 or Thermistor Sensor Cl 6527A Rod Stand ME 9355 PASPORT Xplorer PS 2000 or laptop computer Piece of cardboard Measuring tape and scale Note This is a more advanced lab Two Temperature Sensors or one temperature sensor and a thermometer are required You will use one Temperature Sensor to measure the temperature of the aluminum plate and a second Temperature Sensor or thermometer to measure the ambient temperature 1 Disconnect the thermistor from the plate and measure the mass of the WARNING To avoid plate Measure the plate s size and calculate the area of plate burns or bodily injury when heating the box do 2 Cool the plate to 10 C to 20 C below the outside temperature not overheat the box You can stick the plate in a refrigerator or use an ice cube Be above 100 C and do not sure the plate 1s dry touch either side of the aluminum plate or the 3 Place the aluminum plate in the Solar Box with the black side thermistor contact facing up to the sun Do not use the plastic cover 4 Connect the Temperature Sensor to the side jacks of the box with the supplied cable If possible have a second temperature sensor measuring outside temperature Note The second Temperature Sensor or a thermometer must be in the shade for an accurate determination of the outside ambient air temperature CAUTION Overheatin
6. arth s atmosphere is about 1400 Watts m On a good clear day with the sun high in the sky you can get over 1000 Watts m7 on the surface For Further Study a Compare the intensity at noon to later in the day b Compare a clear day to a slightly overcast day c Compare summer to winter 10 1 VrYee Model No ET 8593 Energy Transfer Solar Sample Data Results Experiment 1 Solar Heating The covered box has the final higher temperature With the covered box the greenhouse effect occurs Light enters the transparent cover but the infrared light is not re radiated back out The infrared light heats the plate Also the cover traps the hot air inside the box isolating and insulating the air oo oo a A BU a a Temperature deg E En Timer minutes 20 40 Qu Di Experiment 2 Solar Constant m i Slope Note This data was taken late in the afternoon 39 E is Lo REA o pa Di mi 16 l D Di I See Qu a Pi Timer s 60 Power me 0 085 kg 900 joules kg C 0 361 27 6 watts Intensity 27 6 watts 0 038 m 730 watts m PASCOR Li Energy Transfer Solar Model No ET 8593 Appendix A e Conversion Table Ohms Celsius Ohms a Ohms e 82660 o 6808 1876 a 28060 S 26 680 4 5776 38 1687 25 400 5546 39 e 78 24 180 S 5328 40 a a 21920 e 4918 42 148
7. g the box may permanently damage the thermistor and the plastic lid The thermistor s maximum 5 Recheck the sun s angle You might have to adjust the box relative to the sun s angle during the run Note The angle of the sun relative to the box must be 90 degrees iii ii i i 135 C 6 In DataStudio create a graph of temperature vs time For the time ae variable use seconds not minutes on the graph 7 In DataStudio click the Start button to begin recording at the default sample rate of 2 Hz Heat the box until it is 10 C to 20 C above outside temperature ZEIN 9 Energy Transfer Solar Model No ET 8593 Analysis a Find the slope of the line tangent to the curve at outside ambient air temperature Do not use the Slope Tool Highlight a small section at outside ambient temperature At ambient temperature the heating is only being caused by the sunlight Below the ambient temperature the surrounding air is cooling the container Above the ambient temperature the surrounding air 1s heating the container Slope a change in temperature change in time b Theory for heat flow Q mcAT where Q heat c specific heat and AT change in temperature Power L mei A At melt Intensity Power _ At where Z is the slope of the graph Area Area c Using your slope and the other measured quantities calculate the intensity of the sun s light The intensity solar constant at the top of the E
8. gure 3 6 Adjust the angle of the box such that the sun s rays enter the box perpendicularly Use the white knob indicator as a Figure 3 Mounting the guide Solar Box to a rod stand ZEIN 5 Energy Transfer Solar Model No ET 8593 Note If there is no shadow on the plate the sun s rays are perpendicular to the plate 7 Plug the Temperature Sensor into a PASPORT Xplorer To take a temperature reading click the Start button on Xplorer Note The Xplorer data can later be uploaded into DataStudio and viewed in a DataStudio graph display OR If you are using an ohmmeter instead of a Temperature Sensor turn on the meter and take a resistance measurement To find the temperature use the resistance to temperature conversion chart in Appendix A OR If you are using a laptop and a temperature probe plug the Temperature Sensor plug into a USB port on your laptop computer Launch DataStudio and click the Start button to collect data WARNING To avoid burns or bodily injury when heating the box do not overheat the box above 100 C and do not touch either side of the aluminum plate or the thermistor contact CAUTION Overheating the box may permanently damage the thermistor and the plastic lid The thermistor s maximum temperature capacity is doo PAS C Ci Model No ET 8593 Energy Transfer Solar Suggested Experiments Experiment 1 Solar Heating and the Greenhouse Effect Equi
9. pment Required Energy Transfer Solar ET 8593 Temperature Sensor PS 2125 or Thermistor Sensor Cl 6527A or an Ohmmeter Multimeter Rod Stand ME 9355 PASPORT Xplorer PS 2000 or laptop computer Piece of cardboard Temperature vs Resistance Chart See Appendix A DataStudio Software Part I Solar Heating 1 Mount the box with plate to arod stand such that the Sun s angle is perpendicular to the aluminum plate and the white plastic knob has no shadow Keep the black side of the aluminum i plate facing up See AS EN Figure 4 2 Use a PS 2000 Xplorer or a laptop computer for data collection Set the sample rate in either Xplorer or DataStudio for 2 Hz Figure 4 Setup for Solar Heating Experiment 3 Have a piece of cardboard available to shade the box while setting up A 4 In DataStudio click the Start button to begin data collection and remove the cardboard shade CAUTION Overheating the box may permanently damage the thermistor and the plastic lid The thermistor s maximum 5 With the plastic cover on take a run of data in DataStudio Let the box heat until the temperature levels off The approximate duration is 10 to 30 minutes depending on the outside temperature and the intensity of the sunlight temperature capacity is 135 C 1 7 EJoTo 7 Energy Transfer Solar Model No ET 8593 Note Watch the angle of the sun The angle of the sun must be 90 degrees to the
10. re not removable from the box The thermistor contact metal lug is fastened in the center on the underside of the aluminum plate The side jacks on the Solar Box allow you to connect a Temperature Sensor or ohmmeter to the thermistor Model No ET 8593 Note The thermistor s temperature range is 35 C to 135 C 242 800 to 265 ohms PAS C Ci Model No ET 8593 Energy Transfer Solar Equipment Setup Note A rod stand is required for adjusting the Solar Box to the sun s angle 1 Remove the thumbscrew on the aluminum plate Place the thermistor lug underneath the center hole on the aluminum side of the plate Insert the thumbscrew through the hole On the black side put the shadow indicator over the screw and tighten See Figure 1 thermistor lug Figure 1 Thermistor position 2 Place the aluminum plate inside the Solar Box with the black side face up Note Keep the thermistor contact on the underside of the plate 3 Snap the bottom and top tabs of the clear plastic cover onto the Solar Box See Figure 3 4 Using the thermistor cable connect the Temperature Sensor or Thermistor Sensor to the two jacks on the side of the Solar Box Figure 2 If a Temp erature Figure 2 Connecting the Sensor 1s not available thermistor cable connect an ohmmeter to the side jacks 5 Use the rod clamp on the side of the Solar Box to mount the base of the Solar Box to a rod stand Fi
11. ty does not cover damage to the product caused by abuse or improper use Determination of whether a product failure is the result of a manufacturing defect or improper use by the customer shall be made solely by PASCO scientific Responsibility for the return of equipment for warranty repair belongs to the customer Equipment must be properly packed to prevent damage and shipped postage or freight prepaid Damage caused by improper packing of the equipment for return shipment will not be covered by the warranty Shipping costs for returning the equipment after repair will be paid by PASCO scientific PASCOR 18
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