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Velleman EDU06 User Manual

Manual is about: oscilloscope tutor kit

Summary of EDU06

  • Page 1

    L earn how to get the most out of your digital oscilloscope . Edu06 oscilloscope tutor kit hedu06 by velleman n.V..

  • Page 2

    G etting started the purpose of this board is to learn how to perform basic measurements with an oscilloscope. Most experiments can be performed with any digital storage scope. Some experiments can be performed with an analog scope. Experiments in this project are performed using the velleman hps140...

  • Page 3: Contents

    Contents getting started ..................................................................................................................................................... 2 oscilloscope basics ..........................................................................................................

  • Page 4: Oscilloscope Basics

    4 oscilloscope basics while a multimeter shows an instant voltage level or an average voltage level, an oscilloscope is capable of displaying voltage levels over a period of time. Voltage is displayed vertically (x-axis) versus time (y-axis). Oscilloscopes can be used to for applications such as: lo...

  • Page 5

    5 measuring probe: to be able to display waveforms, we need to connect the signal to the input of the oscilloscope. Similar to a multimeter, the oscilloscope uses a measurement lead, but here it is called a ‘probe’. Connecting the probe: 2 1 4 3 1 2 3 4 5 probe tip: the (+) of your probe. It is need...

  • Page 6

    6 experiment 1: measuring ac voltage connection layout: connection summary: gnd clip : 2 probe tip : 1 purpose: the purpose of this experiment is to display and measure ac voltage. In this particular case, we will measure the ac voltage supplied to the board. How?: turn on the hps140 handheld pocket...

  • Page 7

    7 experiment 2: adjustable ac voltage (advantages of the auto-setup function) connection layout: connection summary: gnd clip : 2 probe tip : 3 purpose: the purpose of this experiment is to show the advantages of the auto-setup function to measure ac voltage. How?: turn on the hps140 handheld pocket...

  • Page 8

    8 exp.2: adjustable ac voltage (advantages of the auto-setup function) turn rv1 a little further clockwise. The signal goes off- screen and the vrms readout displays ?????Mv, because the unit is no longer capable of calculating the correct vrms. How can we display the current signal correctly again?...

  • Page 9: And Period

    9 experiment 3: measuring ac grid frequency and period connection layout: connection summary: gnd clip : 2 probe tip : 3 purpose: the purpose of this experiment is to demonstrate the use of the markers to perform on-screen measurement of frequency and period. How?: turn on the hps140 handheld pocket...

  • Page 10

    10 press the upper right button again to select vertical marker 2. Use the arrow keys to position this marker at the exact same location but further to the right of the screen. You have now selected one period or cycle of the displayed waveform. In the lower right corner, the unit displays the time ...

  • Page 11

    11 experiment 4: rectifi ed ac, single phase connection layout: connection summary: gnd clip : 4 probe tip : 5 purpose: the purpose of this experiment is to show what single phase recti fi ed ac looks like on a scope screen. How?: turn on the hps140 handheld pocket scope 1. (see hps140 manual for ho...

  • Page 12

    12 experiment 5: rectifi ed ac, dual phase connection layout: connection summary: gnd clip : 4 probe tip : 5 purpose: the purpose of this experiment is to show what dual phase recti fi ed ac looks like on a scope screen and to show the difference with single phase recti fi ed ac. How?: turn on the h...

  • Page 13

    13 now, check what happens when you fl ip the switch from single phase to dual phase recti fi cation. Flip the switch back and forward, to clearly see the difference between both settings. A little theory: as you can see, the ‘interruptions’ we have noticed with single phase recti fi cation are gone...

  • Page 14: Dc (Ripple)

    14 experiment 6: smoothed versus unsmoothed dc (ripple) connection layout: connection summary: gnd clip : 4 probe tip : 6 purpose: the purpose of this experiment is to show what smoothed and unsmoothed dc looks like on a scope screen and how a scope can help you to determine the quality of your dc s...

  • Page 15

    15 can we measure this amount of ripple? Yes we can, a scope is the ideal tool for ripple measurement. Flip sw1 back to single phase recti fi cation. Default, your scope starts up with ‘dc-coupling’ selected. Change that to ‘ac-coupling’ (see manual for how-to instructions). Now, the scope will only...

  • Page 16

    16 experiment 7: dc measurement connection layout: connection summary: gnd clip : 4 probe tip : 6 purpose: the purpose of this experiment is to show that a scope is also suited to measure dc voltages. In general, scopes are used to measure ac voltages. For dc voltages, a multimeter is fi ne. However...

  • Page 17

    17 set the dc reference: to set the dc reference, set the input coupling to gnd and wait a couple of seconds, until the dc readout in the lower right hand corner displays ‘0.0mv’. If the settings have been performed correctly, your scope will now show a fl at trace above the centre of the screen and...

  • Page 18: Frequency

    18 experiment 8: waveform with adjustable frequency connection layout: connection summary: gnd clip : 4 probe tip : 9 purpose: the purpose of this experiment is to demonstrate the use of the ‘trigger’-function. How?: place the probe switch “x1/x10” to ‘x1’. 1. Flip sw1 into the ‘full wave’-position....

  • Page 19

    19 exercise: press and hold the upper right hand button, to enter the menu. Release and press again a number of times until ‘trg level’ is highlighted. Wait until unit quits the menu. Now look at the bottom left hand side of the screen, the trigger symbol is displayed. The arrow buttons allow you to...

  • Page 20: Glossary

    20 glossary volts/div: 1. Determines how many volts the signal at the input must swing for the trace to move one division. Time/div: 2. Determines the time the trace needs to scan from the the left hand side to the right hand side of a division. Division: 3. Imaginary or visible grid on the oscillos...

  • Page 21

    21 noise: undesired random addition to a signal. Ripple: unwanted periodic variation of a dc voltage. Signal: voltage applied to the input of the oscilloscope. The subject of your measurement. Sine wave: mathematical function that represents a smooth repetitive oscillation. The waveform shown at the...

  • Page 22

    22 diagram d1d1 1n40071n 40 07 d3d3 1n40071n 40 07 d2d2 1n40071n 40 07 d4d4 1n40071n 40 07 d5d 5 1n40071n 40 07 sws w - + sk1sk 11 dcd c jackja c k c1c1 100µ/25v10 0µ /25 v sk1sk 1 sk6sk 6 sk7sk 7 sk4sk 4 sk3sk 3 r2r2 10k10 k r3r 3 10k10 k r6r 6 10k10 k sk5sk 5 sk8sk 8 t2t2 bc547bc 54 7 t1t1 bc547bc...

  • Page 23

    Lab2: three in one lab unit this unique unit includes a digital oscilloscope (40ms/s), a digital function generator (1mhz) and a simple but easy-to- use power supply (up to 12vdc). The 3 units are electrically separated for ease of measurement. T aps230: advanced personal scope 240ms/s feature-packe...

  • Page 24

    Hedu06’1 13 + signals alternating current (ac) ◊ adjustable ac ◊ full- and half wave recti fi ed ac ◊ smoothed direct current (dc) ◊ ripple ◊ astable oscillator ◊ signals the board generates a number of safe ‘real-world’ signals, which we will use to perform measurements. Get familiarized with ac, d...