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Pasco Scientific SF-9584A Instruction Manual

Low voltage ac/dc power supply
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Instruction Manual
for the PASCO scientific
Model SF-9584A
LOW VOLTAGE AC/DC
POWER SUPPLY
LOW VOLTAGE AC/DC POWER SUPPLY
VOLTAGE ADJUST
–
0 – 24 V
© 1996 PASCO scientific
®
¨
V
CURRENT ADJUST
DC
+
10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA
Phone (916) 786-3800 • FAX (916) 786-8905 • email: techsupp@PASCO.com
¨
SF-9584A
A
12 14
10
8
6
MAX DC CURRRENT
10 A
4
6 A
2
12 V
24 V
6 A MAX
012-06263A
10/96
OFF
AC
16
18
20
ON
22
24
RESET
2-24 V
better
ways to
teach science
$5.00

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Summary of Contents for Pasco Scientific SF-9584A

  • Page 1 012-06263A Instruction Manual 10/96 for the PASCO scientific Model SF-9584A LOW VOLTAGE AC/DC POWER SUPPLY LOW VOLTAGE AC/DC POWER SUPPLY ¨ SF-9584A 12 14 VOLTAGE ADJUST CURRENT ADJUST MAX DC CURRRENT 10 A RESET – 12 V 24 V 2-24 V 0 –...
  • Page 2 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER ON UNIT. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user of the presence of uninsulated “dangerous voltage”...

  • Page 3: Table Of Contents

    012-06263A Low Voltage AC/DC Power Supply Table of Contents Section Page Copyright, Warranty, and Equipment Return ............ii Introduction ....................... 1 Operation ....................... 1 - 2 Equipment Specifications ................... 3 Schematics and Parts Lists ................5 - 12 Technical Support ................... Back Cover...

  • Page 4: Copyright, Warranty And Equipment Return

    When returning equipment for repair, the units must Limited Warranty be packed properly. Carriers will not accept responsi- PASCO scientific warrants the product to be free from bility for damage caused by improper packing. To be defects in materials and workmanship for a period of one certain the unit will not be damaged in shipment, year from the date of shipment to the customer.

  • Page 5: Introduction

    Plug the power cord into a grounded outlet of the ap- propriate voltage : Constant Voltage mode: Model SF-9584A, 115 V AC (78–130 V AC), 60 Hz The voltage is continuously variable from 0 –24 V DC. The maximum load drawn in the range from 0–12 V DC Model SF-9584A-230, 230 V AC (200 –242 V AC),...
  • Page 6 : put current of 6 amperes. This output is protected by Model SF-9584A, 115 V AC (78 - 130 V AC), 60 Hz a 6-amp circuit breaker. If the maximum current out- put is exceeded, the circuit breaker button below the Model SF-9584A-230, 230 V AC (200 - 242 V AC), power switch will pop out.

  • Page 7: Equipment Specifications

    2–V increments, current up to 6 amperes. Output pro- 78–130 V AC, 60 Hz (model SF-9584A) tected from overload by a 6-amp thermally-activated cir- 200–242 V AC, 50 Hz (model SF-9584A - 230) cuit breaker. Independent floating ground reference. Power Requirement:...
  • Page 8 Low Voltage AC/DC Power Supply 012-06263A Notes:...

  • Page 9: Schematics And Parts Lists

    012-06263A Low Voltage AC/DC Power Supply Schematics and Parts Lists ä...
  • Page 10 Low Voltage AC/DC Power Supply 012-06263A...
  • Page 11 012-06263A Low Voltage AC/DC Power Supply Parts List – Main Board...
  • Page 12 Low Voltage AC/DC Power Supply 012-06263A...
  • Page 13 012-06263A Low Voltage AC/DC Power Supply Parts List – Display Unit...
  • Page 14 Low Voltage AC/DC Power Supply 012-06263A...
  • Page 15 012-06263A Low Voltage AC/DC Power Supply Parts List – Switch-Mode Regulator...
  • Page 16 Low Voltage AC/DC Power Supply 012-06263A Parts List – Filter Board...

  • Page 17: Technical Support

    012-06263A Low Voltage AC/DC Power Supply Technical Support Contacting Technical Support Feedback Before you call the PASCO Technical Support staff, it If you have any comments about the product or manual, would be helpful to prepare the following information: please let us know. If you have any suggestions on alter- nate experiments or find a problem in the manual, please If your problem is computer/software related, note: tell us.
  • Page 19 The Science Workshop software can also generate a DC output. © 1995 PASCO scientific This instruction edited by Robert Morrison better ways to 10101 Foothills Blvd.
  • Page 20 Should this product have to be returned to PASCO scien- channel C. The Power Amplifier II can also be tific, for whatever reason, notify PASCO scientific by let- plugged into Channel A or B but these channels are ter or telephone BEFORE returning the product. Upon...
  • Page 21 012-03175E Instruction Manual and 3/93 Experiment Guide for the PASCO scientific Model ES-9054B ELECTROMETER FUNCTION B1 B2 Model ES-9054B ELECTROMETER ZERO ADJUST POWER scientific INPUT OUTPUT ZERO PUSH LOCK ZERO © 1987 PASCO scientific $7.50...
  • Page 22 012-03175E Electrometer Table of Contents Section Page Copyright and Warranty ..................ii Equipment Return ...................ii Introduction ..................... 1 Operation ......................1 Setup ......................2 Measuring Charge ..................3 Measuring Voltage ..................4 Measuring Current ..................4 Using a Projection Meter ................5 Maintenace ......................

  • Page 23: Equipment Return

    AUTHORIZATION FROM PASCO. Limited Warranty When returning equipment for repair, the units must be PASCO scientific warrants the product to be free from packed properly. Carriers will not accept responsibility defects in materials and workmanship for a period of for damage caused by improper packing. To be certain one year from the date of shipment to the customer.

  • Page 24: Introduction

    012-03175E Introduction The Model ES-9054B Electrometer is an infinite With these features, you’ll find that your electrostatics impedance (10 ý) voltmeter that can be used for demonstrations and labs are easier to perform and, with direct measurements of voltage, and indirect measure- quantitative data, are more informative as well.

  • Page 25: Setup

    012-03175E Mechanical zero adjust screw (adjust with power off) Select voltage range (3, 10, 30, or 100 volts full scale) or FUNCTION test batteries B1 B2 (B1 and B2) Model ES-9054B ELECTROMETER ZERO ADJUST Zero meter (zero POWER scientific switch should be in INPUT OUTPUT ZERO LOCK position)

  • Page 26: Measuring Charge

    012-03175E Measuring Charge Measuring Charge by Induction Under most conditions, the best way to measure charge Charge measurement with the electrometer is indirect, is by induction, using a proof plane and a Faraday ice but simple. It is based on the relationship Q = CV, pail such as those included with PASCO’s Demonstra- where tion Electrostatics System.

  • Page 27: Measuring Voltage

    012-03175E To measure the total capacitance: inside cylinder of the ice pail, the Electrometer reading will Turn on the Electrometer and zero the meter. Clip generally remain relatively unchanged. This is because the the test lead of the probe to the inside cylinder of total capacitance is only negligibly affected by the proof your ice pail and the ground lead to the outside cyl- plane.

  • Page 28: Maintenace

    012-03175E PASCO’s Model ES-9065 Projection Meter can be Turn the ZERO ADJUST knob until the meter on the Electrometer reads as close to full scale as used with an overhead projector to display the Elec- possible (either postive or negative). trometer readings for the whole class.

  • Page 29: Mos-Fet Replacement

    Transistor). You can order a replacement from covered in the preceding sections, we strongly suggest PASCO scientific (Part # 422-001) . When ordering a you return it to PASCO scientific for repair. replacement part, be sure to include the model number of the Electrometer.

  • Page 30: Schematic

    012-03175E SCHEMATIC Model ES-9054B Electrometer (Drawing #956-02859)
  • Page 31 012-03175E Parts List Reference Description PASCO Part # R1,2,5,13, Resistor, 10 ký, 1/4 W, 5% 113-103 20,21 Resistor, 1 ký, 1/4 W, 5% 113-102 Resistor, 13 ký, 1/4 W, 5%, C.C. 113-133 R6,24 Resistor, 470 ý, 1/4 W, 5% 113-471 Potentiometer, 10 ký, 1/4 W, 30% 140-006 Resistor, 330 ý, 1/4 W, 5%...
  • Page 32 012-03175E Electrometer Technical Support Feedback Contacting Technical Support If you have any comments about the product or manual, Before you call the PASCO Technical Support staff, it please let us know. If you have any suggestions on would be helpful to prepare the following information: alternate experiments or find a problem in the manual, If your problem is with the PASCO apparatus, note: please tell us.
  • Page 33 Dimensions: 17.5 x 13.5 x 6 cm When using the 30 VDC range use the red and black binding posts. The black binding post is connected to the third prong (ground) on the power cord. © 1989 PASCO scientific This instruction sheet written/edited by: Dave Griffith...
  • Page 34 Limited Warranty the user of the presence of uninsulated “dangerous voltage” within the product’s PASCO scientific warrants this product to be free from enclosure that may be of sufficient magni- defects in materials and workmanship for a period of one tude to constitute a risk of electric shock to year from the date of shipment to the customer.

  • Page 35: Parts List

    Power Supply 012-01568C PARTS LIST Specification Pasco part no. Reference Resistors: 22K, 1/4W, 5% 113-223 18K, 2W, 5% 110-183 1K, 2W, 5% 110-102 4.7M, 1/4W, 5% 113-475 R4, R5 150K, 1/2W, 1% 122-064 100M, 1/2W, 5% 150-006 4.99M, 1/2W, 1% 150-015 POT, Two Section 140-032...
  • Page 36 Power Supply 012-01568C SCHEMATIC...
  • Page 37 Experiment Guide for Experiment Results the PASCO scientific Model EM-8622 BASIC ELECTRICITY © 1990 PASCO scientific $10.00 better ways to 10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA teach physics Phone (916) 786-3800 • FAX (916) 786-8905 • TWX 910-383-2040...
  • Page 38 012-04367E Basic Electricity Table of Contents Section ......................Page Copyright, Warranty, and Equipment Return ..........ii Introduction ..................... 1 Equipment ......................1 Getting Started, The Experiments ..............2 Comments on Meters ..................3 Notes on the Circuits Experiment Board ............4 Experiments Experiment 1: Circuits Experiment Board ........

  • Page 39: Copyright, Warranty And Equipment Return

    THORIZATION. Limited Warranty When returning equipment for repair, the units must be PASCO scientific warrants this product to be free from packed properly. Carriers will not accept responsibility defects in materials and workmanship for a period of one for damage caused by improper packing. To be certain year from the date of shipment to the customer.

  • Page 40: Introduction

    The PASCO Model EM-8622 Circuits Experiment Kit includes the following materials: 012-04367A Instruction Manual and 3 / 9 1 Experiment Guide for the PASCO scientific (2) Circuits Experiment Boards, Model EM-8622 (1) Resistor–– 3.3 Ω, 2W, 5% BASIC ELECTRICITY (1) Potentiometer–– 25 Ω, 2W...
  • Page 41 Basic Electricity 012-04367E Getting Started Store the remainder of the components in the zip- Open the zip-lock bag containing the resistors and lock bag until needed in future experiments. other components. Distribute the following resistors and wires to each of the boards, storing them in the Students will need to use the same resistors, same bat- plastic holder at the top of the board: teries, etc.

  • Page 42: Comments On Meters

    012-04367E Basic Electricity Comments on Meters VOM: VTVM: The Volt-Ohm-Meter or VOM is a multiple scale, multiple The Vacuum Tube Voltmeter or VTVM is a multiple function meter (such as the PASCO SB-9623 Analog scale, multiple function meter, typically measuring Multimeter), typically measuring voltage and resistance, voltage and resistance.

  • Page 43: Notes On The Circuits Experiment Board

    Basic Electricity 012-04367E Notes on the Circuits Experiment Board The springs are securely soldered to the board and serve When connecting a circuit to a D-cell, note the polarity as a convenient method for connecting wires, resistors (+ or -) which is printed on the board. In some cases the and other components.

  • Page 44: Experiment 1: Circuits Experiment Board

    012-04367E Basic Electricity Experiment 1: Circuits Experiment Board EQUIPMENT NEEDED: -Circuits Experiment -Board -D-cell Battery -Wire Leads -Graph -Paper Purpose The purpose of this lab is to become familiar with the Circuits Experiment Board, to learn how to construct a complete electrical circuit, and to learn how to represent electrical circuits with circuit diagrams.
  • Page 45 Basic Electricity 012-04367E Procedure Use two pieces of wire to make connections between the springs on one of the light bulbs to the springs on the D-cell in such a way that the light will glow. Discuss with your lab partner before you begin actually wiring your circuit which connections you intend to make, and why you think you will be successful in activating the light.

  • Page 46: Experiment 2: Lights In Circuits

    012-04367E Basic Electricity Experiment 2: Lights in Circuits EQUIPMENT NEEDED: -Circuits Experiment Board -Two D-cell Batteries -Wire Leads -Graph Paper. Purpose The purpose of this lab is to determine how light bulbs behave in different circuit arrangements. Different ways of connecting two batteries will also be investigated. Procedure PART A NOTE: Due to variations from bulb to bulb, the brightness of one bulb may be substantially...
  • Page 47 Basic Electricity 012-04367E PART B Connect a single D-cell to a single light as in step 1, using a spring clip “switch” to allow you to easily turn the current on and off. Note the brightness of the light. Now connect the second D-cell into the circuit as shown in Figure 2.1a. What is the effect on the brightness of the light? Figure 2.1b Figure 2.1a...

  • Page 48: Experiment 3: Ohm's Law

    012-04367E Basic Electricity Experiment 3: Ohm’s Law EQUIPMENT NEEDED: -Circuits Experiment Board -D-cell Battery -Multimeter -Wire Leads -Graph Paper. Purpose The purpose of this lab will be to investigate the three variables involved in a mathematical relationship known as Ohm’s Law. Procedure Choose one of the resistors that you have been given.
  • Page 49 Basic Electricity 012-04367E Data Processing Construct a graph of Current (vertical axis) vs Resistance. For each of your sets of data, calculate the ratio of Voltage/Resistance. Compare the values you calculate with the measured values of the current. Resistance, Ω Current, amp Voltage, volt Voltage/Resistance...

  • Page 50: Experiment 4: Resistances In Circuits

    012-04367E Basic Electricity Experiment 4: Resistances in Circuits EQUIPMENT NEEDED: -Circuits Experiment Boar - Multimeter -Resistors. Purpose The purpose of this lab is to begin experimenting with the variables that contribute to the opera- tion of an electrical circuit. This is the first of a three connected labs. Procedure Choose the three resistors having the same value.
  • Page 51 Basic Electricity 012-04367E Series Figure 4.1 Construct a PARALLEL CIRCUIT, first using combinations of two of the resistors, and then using all three. Measure and record your values for these circuits. Parallel NOTE: Include also R Connect the COMBINATION CIRCUIT below and measure the various combinations of resistance.
  • Page 52 012-04367E Basic Electricity Colors Coded Measured Tolerance 4th Resistance Resistance Error Table 4.2 Series Figure 4.4 Parallel Figure 4.5 NOTE: Include also R...
  • Page 53 Basic Electricity 012-04367E Combination Figure 4.6 Discussion How does the % error compare to the coded tolerance for your resistors? What is the apparent rule for combining equal resistances in series circuits? In parallel circuits? Cite evidence from your data to support your conclusions. What is the apparent rule for combining unequal resistances in series circuits? In parallel circuits? Cite evidence from your data to support your conclusions.

  • Page 54: Experiment 5: Voltages In Circuits

    012-04367E Basic Electricity Experiment 5: Voltages in Circuits EQUIPMENT NEEDED: -Circuits Experiment Board -Multimeter -D-cell Battery -Resistors -Wire Leads Purpose The purpose of this lab will be to continue experimenting with the variables that contribute to the operation of an electrical circuit. You should have completed Experiment 4 before working on this lab.
  • Page 55 Basic Electricity 012-04367E Now connect the parallel circuit below, using all three resistors. Measure the voltage across each of the resistors and the combination, taking care with the polarity as before. NOTE: Keep all three resistors connected throughout the time you are making your measurements.
  • Page 56 012-04367E Basic Electricity Series Figure 5.4 Parallel Figure 5.5...
  • Page 57 Basic Electricity 012-04367E Combination Figure 5.6 Discussion On the basis of the data you recorded on the table with Figure 5.1, what is the pattern for how voltage gets distributed in a series circuit with equal resistances? According to the data you recorded with Figure 5.4, what is the pattern for how voltage gets distributed in a series circuit with unequal resistances? Is there any relationship between the size of the resistance and the size of the resulting voltage?

  • Page 58: Experiment 6: Currents In Circuits

    012-04367E Basic Electricity Experiment 6: Currents in Circuits EQUIPMENT NEEDED: -Circuits Experiment Board -Digital Multimeter -Resistors -D-cell Battery -Wire Leads. Purpose The purpose of this lab will be to continue experimenting with the variables that contribute to the operation of electrical circuits. Procedure Connect the same three resistors that you used in Experiments 3 and 4 into the series circuit shown below, using the springs to hold the leads of the resistors together without bending them.
  • Page 59 Basic Electricity 012-04367E Figure 6.3 Connect the parallel circuit below, using all three resistors. Review the instructions for connecting the DMM as an ammeter in step 2. Connect it first between the positive terminal of the battery and the parallel circuit junction to measure I .

  • Page 60: Experiment 7: Kirchhoff's Rules

    012-04367E Basic Electricity Experiment 7: Kirchhoff’s Rules EQUIPMENT NEEDED: -Circuits Experiment Board -Two D-cell Batteries -Wire Leads -Digital Multimeter (DMM) -Resistors. Purpose The purpose of this lab will be to experimentally demonstrate Kirchhoff’s Rules for electrical circuits. Procedure Connect the circuit shown in Figure 7.1a using any of the resistors you have except the 10 Ω one.
  • Page 61 Basic Electricity 012-04367E Resistance, Ω Voltage, volts Current, mA Table 7.1 Analysis Determine the net current flow into or out of each of the four “nodes” in the circuit. Determine the net voltage drop around at least three (3) of the six or so closed loops. Re- member, if the potential goes up, treat the voltage drop as positive (+), while if the potential goes down, treat it as negative (-).

  • Page 62: Experiment 8: Capacitors In Circuits

    012-04367E Basic Electricity Experiment 8: Capacitors in Circuits EQUIPMENT NEEDED: – Vacuum Tube Voltmeter (VTVM) or Elec- – Circuits Experiment Board trometer (ES-9054B) or Digital Multimeter – Capacitors, Resistors (DMM) that has an input impedance of 10 MΩ – Wire Leads or greater.
  • Page 63 Basic Electricity 012-04367E Trial Resistance Capacitance Table 8.1 Replace the 100-µF capacitor with a 330-µF capacitor. Repeat step 7, recording the charging and discharging times in Table 8.1. If a third value is available, include it in the data table, too. Return to the original 100-µF capacitor, but put a 220-K Ω...

  • Page 64: Experiment 9: Diodes

    012-04367E Basic Electricity Experiment 9: Diodes EQUIPMENT NEEDED: -Circuits Experiment Board -Digital Multimeter (DMM) -Wire Leads -Two D-cell Batteries -1000-Ω Resistor -1N4007 Diode -330-Ω Resistor. Purpose The purpose of this lab will be to experimentally determine some of the operating characteristics of semiconductor diodes.
  • Page 65 Basic Electricity 012-04367E Discussion Discuss the shape of your graph and what it means for the operation of a semiconductor diode. Did the diode operate the same in steps 3 and 4 as it did in step 5? In steps 3 and 4 the diode was “Forward Biased”, while it was “Reverse Biased”...

  • Page 66: Experiment 10: Transistors

    012-04367E Basic Electricity Experiment 10: Transistors EQUIPMENT NEEDED: -Circuits Experiment Board -Two D-cell Batteries -Wire Leads -Digital Multimeter (DMM) -1000-Ω Resistor -2N3904 Transistor (NPN) -100-Ω Resistor. Purpose The purpose of this lab will be to experimentally determine some of the operating characteristics of a transistor.
  • Page 67 Basic Electricity 012-04367E Analysis For each of your sets of readings, calculate: and I Record all of your current readings in mA. Plot a graph of I (vertical axis) vs I . If you find an area or areas where you need more points to fill out any curves or sudden changes, simply return to step 2 and make the appro- priate measurements.

  • Page 68: Appendix: Tips And Troubleshooting

    012-04367E Basic Electricity Appendix: Tips and Troubleshooting Correct Circuit, Doesn’t Work The labs asking for relative brightness ask students to judge relative brightness only, not an absolute brightness. • Check to see if the circuit is indeed connected cor- This part of the experiment would be aided by having the rectly and completely.
  • Page 69 Basic Electricity 012-04367E Wires Pulling the wire away from the stripper (Figure 3c) causes the cut end of the insulation to slip off of the wire, leaving The Circuits Experiment Board can be used with a large 3/8" of exposed wire. variety of wire types and sizes.

  • Page 70: Replacement Parts List

    012-04367E Basic Electricity Replacement Parts List Item PASCO Part # P.C.B. ASSY, BASIC ELECT 004-04340 MANUAL EM-8622 012-04367 RES, 10 OHM, 1W, 5% 111-100 RES, 100 OHM, 1/2W, 5% 112-101 RES, 1K, 1/2W, 5% 112-102 RES, 100K, 1/2W, 5% 112-104 RES, 220K, 1/2W, 5% 112-224 RES, 330 OHM, 1/2W, 5%...
  • Page 71 Basic Electricity 012-04367E Notes...

  • Page 72: Teacher's Guide

    012-04367E Basic Electricity Teacher's Guide Exp 1 - Circuits Experiment Board With this method, the lights will each be approximately the same brightness as in part 1. Serial: Reversing things at either end had no effect. There are two different ways of putting two lamps into the circuit: parallel and serial.
  • Page 73 Basic Electricity 012-04367E Exp 3- Ohm's Law Procedure 0.16 )Warn the students to be particularly careful when 0.14 setting up the multimeter to measure current. Attach- 0.12 ing an ammeter the wrong way can damage the meter. Data Processing 0.08 Resistance Current Voltage...
  • Page 74 012-04367E Basic Electricity Colors coded measured % error tolerance A brown-black-brown-gold 98.9 -1.10% ±0.05% B orange-orange-brown-gold 0.00% ±0.05% C green-blue-brown-gold 0.18% ±0.05% Discussion In series, the resistances are added. R = R + ...In parallel, the reciprocals of the The actual value matches the coded value much more resistances are added.
  • Page 75 Basic Electricity 012-04367E Exp 6- Currents in Circuits Discussion NOTE: The resistors used were: In any resistance circuit—series, parallel, or both—the 100Ω voltage, current, and resistance are related by Ohm’s 330Ω Law: 560Ω V = IR These are the same resistors as were used in the This pattern, and conclusion, should be apparent in previous lab, and some of the data here originates in student data.
  • Page 76 012-04367E Basic Electricity Analysis Second circuit: First circuit: node (2,3,4): -0.1 mA node (1,3): 0.1 mA node (b1,3,5): 0.1 mA node (1,2,5): 0.0 mA loop (b1,1,2,3) 0.001 V node (3,4,5): -0.1 mA loop (b2,5,3,4) 0.001 V node (2,4): 0.0 mA loop (b1,1,2,4,b2,5) 0.002 V loop (1,5,3): 0.001 V...
  • Page 77 Basic Electricity 012-04367E Exp 9- Diodes Analysis The diode acts as a one-way valve for electricity. Current can flow in one direction, but not in the other. 0.007 Extensions 0.006 4007 A zener diode would be similar to the 4007, except 0.005 that there would be a breakdown point on the reverse biasing, beyond which the current would flow.

  • Page 78: Technical Support

    012-04367E Basic Electricity Technical Support Feed-Back Contacting Technical Support If you have any comments about this product or this Before you call the PASCO Technical Support staff it manual please let us know. If you have any suggestions would be helpful to prepare the following information: on alternate experiments or find a problem in the manual •...
  • Page 79 OPEN position permits the and circuit configuration (charging, discharging, or open cir- circuit to be disconnected. cuit). The positions of these slide switches on the front panel diagram indicate the exact component values being used. © 1990 PASCO scientific...
  • Page 80 R-C Network 012-04221C Five binding posts allow a power supply, such as the Plot time versus capacitor voltage for several values of PASCO Model ES-9049A Power Supply, and/or the elec- R and C. What is the shape of the curve? trometer to be connected at every possible component Let us define T as the time required for the capacitor connection in the circuit.
  • Page 81 PART REF. DESCRIPTION/RATING Limited Warranty Capacitor, Mylar, .22 mF, 100 V, ±5% PASCO scientific warrants this product to be free from Capacitor, Mylar, .47 mF, 100 V, ±5% C2, C3 defects in materials and workmanship for a period of one Resistor, 100 MΩ, 3/4 W, ±2%...
  • Page 82 R-C Network 012-04221C INPUT OPEN .22 µF 100 MΩ ± 5% 100 V .22 µF 100M 200M 100 MΩ .47 µF .94µF .47 µF, ± 5% .47 µF, ± 5% 100 V 100 V ES-9053A SCHEMATIC...
  • Page 83 012-03800A Instruction Manual 11/89 and Experiment Guide for the PASCO scientific Model SF-8616 and 8617 COILS SET Copyright © November 1989 $15.00...
  • Page 84 We strongly recommend that you read the Introduction and Experiments sections first. These are Introduction The PASCO scientific SF-8616 Basic Coils Set and SF-8617 between the magnet and coil is needed. The effect of Complete Coils Set provide necessary parts to experimen- moving slow versus moving fast can be demonstrated.
  • Page 85 012-03800A Equipment Supplied Your SF-8616 Basic Coils Set comes with the items shown in Figure 5a: a. (1) SF-8609 200-turn Coil b. (2) SF-8610 400-turn Coils c. (1) SF-8611 800-turn Coil d. (1) SF-8614 U-shaped Core e. (1) Manual Your SF-8617 Complete Coils Set comes with all of the items in the SF-8616 Basic Coils Set along with the following additional items, as shown in Figure 5b: f.
  • Page 86 012-03800A Experiments Nature of Magnetic Field from an Electro- magnet The coils from your PASCO Coils Set can be used in conjunction with a d.c. power supply or a battery to produce constant magnetic fields. Three possible experiments are Figure 8b shown below.
  • Page 87 012-03800A Electromagnetic Induction showed a drop-off to an output voltage of less than 20% from the input voltage when the two 400-turn coils were Use a small, relatively strong bar magnet to demonstrate used in this manner. electromagnetic induction. It is only necessary to move the magnet up and down in the center of the coil.
  • Page 88 012-03800A Experiment 1: Transformer Basics I Introduction When an alternating current passes through a coil of wire, it produces an alternating magnetic field. This is precisely the condition needed for the electromagnetic induction to take place in a second coil of wire. In this lab you will investigate several of the factors influencing the operation of a transformer.
  • Page 89 012-03800A Analysis 1. Which core configuration gives the maximum transfer of electromagnetic effect to the secondary coil? Develop a theory to explain the differences between configurations. 2. From your data in table 1.2, for a primary having a constant number of turns, graph the resulting output voltage versus the number of turns in the secondary.
  • Page 90 012-03800A Experiment 2: Transformer Basics II Introduction In this lab you will investigate several of the factors influencing the operation of a transformer. In Experiment 1, the output factor was voltage as measured when there was nothing connected to the secondary (infinite resistance).
  • Page 91 012-03800A Note: Other configurations can be investigated once you have the E-shaped core. At your instructor’s direction, investigate other methods of arranging the primary and secondary coils. 8. If there are more than one PASCO Coils Sets in the laboratory, set up a series of transformers such as the one diagrammed below in Figure 4.
  • Page 92 012-03800A Data and Calculations Table 2.1 Number of Turns Trial # Primary Secondary Load R Input V Input I Output V Output I Table 2.2 Trial # Input P Output P Voltage Gain Power Gain NOTE: It is recommended that the data collected above in Table 2.1 be gathered into a spread sheet program.
  • Page 93 012-03800A Notes: scientific...
  • Page 94 012-03800A Experiment 3: Springing into Electromagnetic Induction Introduction In this lab an interesting arrangement will allow you to investigate some of the subtelties of electromagnetic induction. The results will be qualitative, contrary to many of the labs you have done recently! Equipment Needed - Supplied 1.
  • Page 95 012-03800A Analysis 1. Why did the magnets behave as they did? How does your observation relate to electromag- netic induction? 2. What was the effect of changing the polarity of the leads connecting the two coils? Why? 3. Why did the behavior change as a result of changing the mass of the magnet and/or the spring which was used? 4.
  • Page 96 012-03800A Experiment 4: Intermediate Transformers Introduction In this lab you will continue investigating transformers. You will investigate additional core configurations and work into d.c. power supplies, one of the key applications of transformer technology. Equipment Needed - Supplied 1. The PASCO SF-8617 Complete Coils Set Equipment Needed - Not Supplied 1.
  • Page 97 012-03800A Procedure B 7. Set up the 200-turn coil as primary, and the 800-turn coil as the secondary. Put a diode into the circuit as shown in Figure 4, and leave the 1000-Ω resistor in as a load. 8. In this step, set the triggering of your oscilloscope to “LINE”.
  • Page 98 012-03800A 15. The end result in step 14 is the produc- Diode tion of a full-wave rectified signal, one • which is directional in nature, although Load it varyies in amplitude over time. We Resistor will now add in a 470-µF capacitor as •...
  • Page 99 012-03800A Appendix Technical Data Impedance Maximum Number of Self- ohms PASCO Wire Resistance Current Turns in inductance 50 Hz 60Hz Part No. dia. mm ohms rms Amperes Coil 0.65 SF-8609 0.64 0.67 SF-8610 0.65 SF-8611 0.45 0.5 A 13.5 SF-8612 1600 0.33 0.25 A...
  • Page 100 012-04695D Thermal Radiation System Technical Support Feed-Back Contacting Technical Support If you have any comments about this product or this Before you call the PASCO Technical Support staff it manual please let us know. If you have any sugges- would be helpful to prepare the following information: tions on alternate experiments or find a problem in the •...
  • Page 101 Rotate the dip needle at its banana plug connection with the current magnetic field model. until the plastic scale is in the horizontal plane. © 1990 PASCO scientific This instruction sheet written/edited by: Ann Hanks better ways to 10101 Foothills Blvd.
  • Page 102 Copyright Notice Limited Warranty The PASCO scientific Model SF-8619 Magnetic Dip PASCO scientific warrants this product to be free from Needle manual is copyrighted and all rights reserved. defects in materials and workmanship for a period of one However, permission is granted to non-profit educational year from the date of shipment to the customer.
  • Page 103 Thus we can easily measure relative charges by varying 1.) Adjust the sensitivity of the electrometer so that the charges in the ice pail and observing the potential in- most readings appear in the upper 2/3 of the scale. dicated by the electrometer. © 1993 PASCO scientific...
  • Page 104 Faraday Ice Pail 012-04393B NOTE: Ground the ice pail (i.e., connect the inner pail to the shield) by touching the inner pail and the outer shield The charged object must be inserted at least into the at the same time with the finger of one hand. (See Fig- lower half of the ice pail.
  • Page 105 012-05258B 10/94 Instruction Sheet $1.00 for the PASCO Model ES-9057A Charge Producers and Proof Planes Introduction • If a zero charge is desirable, discharge the charge producers by touching the conductive disk and The ES-9057A Charge Producers and Proof Planes are handle to ground.
  • Page 106 (about 10 Faraday ice pail and shield Limited Warranty PASCO scientific warrants this product to be free from By touching the proof plane to a surface, it will defects in materials and workmanship for a period of acquire the same charge distribution as the surface.
  • Page 107 THERMOELECTRIC CONVERTER Introduction ∆T → E) in order to demonstrate the Seebeck effect The PASCO scientific Thermoelectric Converter (temperature difference causes electric current). consists of a thermoelectric heat pump sandwiched Connect a source of electric current to the red and between two aluminum metal legs.
  • Page 108 012-04929A This was Kelvin’s statement of the Second Law of Thermodynamics. The second law has been stated in many, seemingly unrelated ways; but in the end, all have been shown to be different ways of expressing the same basic principle. In its most general form, the Second Law tells us that no physical process will occur if it decreases the disorder—or entropy—of the universe.
  • Page 109 012-04929A Peltier Effect: During the Peltier effect, a current through the thermo- electric heat pump of the Converter causes a tempera- ture difference. Connect a DC power supply capable of 5 Volts and 3 Amps to the red and black terminals on the Converter.
  • Page 110 (couples) making up the thermoelectric pump. Limited Warranty PASCO scientific warrants this product to be free from defects in materials and workmanship for a period of one year from the date of shipment to the customer. (P-type)

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