Electronic Measurement Beginner's Guide
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The document is a beginner's guide to using electronic measurement devices including digital multimeters, function generators, and oscilloscopes. It explains the functions, appearance, and operation of each device, providing detailed steps to measure voltage, current, resistance, and waveform characteristics. Each device's features, like connection methods and settings adjustments, are illustrated for effective usage.
Electronic Measurement Beginner's Guide
- 2. How to use Digital Multimeter (DMM) beginners manual to use Digital Multimeter
- 3. What is Digital Multimeter DMM DMM is a device used in electronic measurement and troubleshooting electronic Circuits, this device can perform these Functions: 1. Voltmeter: to measure signal voltage (for AC &DC). 2. Ammeter: to measure electrical current (for AC & DC). 3. Ohmmeter: to measure resistance value. 4. Diode tester: to test diodes and define diode terminals (cathode and anode). 5. Short circuit tester: to determine wire continuity or wire’s connectivity.
- 4. How DMM looks like
- 5. Remember Voltmeter is connected in parallel with the load to be measured the voltage across it. Ammeter is connected in series with the load to measure the current passing through it. Ohmmeter & Diode tester are connected in parallel with the load.
- 6. DMM switches (type 1) DC voltmeter Rotary switch Ohmmeter Diode tester DC ammeter AC voltmeter DC ammeter for high current Probes places Short circuit tester
- 7. DMM switches (type 2) Continuity (Short circuit) tester Ohmmeter Voltmeter Diode tester DC ammeter DC ammeter for high current Probes places Rotary switch
- 8. DMM probes Connect red probe here for High DC current measure Black probe always connected to the common of the device. Connect red probe here to use M, VM, low current DC ammeter, diode tester. To the circuit To the circuit
- 9. How to use it Choose the device you want to use through the rotary switch (choose DC voltmeter, AC voltmeter, DC ammeter…,etc). Be aware the range of current, voltage or resistance you are measuring, choose the suitable range where your results is below this range, e.g.: if you want to measure DC voltage equals to 5 volts then choose the 20 volts range switch on the DMM.
- 10. Example Measuring current passing through the resistor. Resistor Battery Enjoy your results ☺
- 11. How to use function generator beginners guide to use function generator
- 12. What is a “function generator” ? Function generator is an electronic device used to generate various AC signals waveforms (square, triangle, ramp, sine waves…etc) with known amplitude and frequency for the process of testing and troubleshooting for electronic systems.
- 13. What the “function generator” does ? Function generator, from its name, generates electrical signals functions, or what we call it AC signals, like the following signals:
- 14. Hint However function generator generate definite or known functions, some types of function generators can generate random signals (like noise) with unknown amplitude or frequency or sweep signal with variable frequency within a certain range. Sweep signal
- 15. How function generator looks like
- 16. Function generator switches Output frequency display Power On/Off Frequency range buttons Function selector buttons Amplitude tuning switch Output port (BNC connector) Frequency tuning switch Frequency fine tuning switch
- 17. Function generator connector Enjoy your signal ☺☺☺☺
- 18. How to use oscilloscope beginners’ manual to use Oscilloscope
- 19. What is “oscilloscope”? Oscilloscope is an electronic measurement device used to view electrical signals waveforms, commonly used with AC (Alternating current) Signals, however it can also display DC signals. Also used to identify the signal frequency and amplitude level.
- 20. How oscilloscope looks like ?
- 21. How waveforms look like on the Oscilloscope display
- 22. Oscilloscope switches Signal input channel 1 Signal input channel 2 Time/division switch Volt/division for channel 1 Volt/division for channel 2 On/Off switch Display Screen focus and intensity
- 23. Time/division and volt/division switches Volt/division switch Time/division switch
- 25. How to use it (1) Step 1: press the On/Off switch to switch ON the oscilloscope. Step 2: connect the circuit to the Oscilloscope. Step 3: press “auto set” button (if found) to get your signal Clear.
- 26. How to use it (2)
- 27. How it works (1) The input voltage is displayed on the oscilloscope display on the “X” and “Y” axis. The X-axes is called Time/Division axes, every square on the display in the X-axes represent the time or duration of the signal, e.g.: if square wave signal appear take 4 square blocks on the X-axes, and each block is equal to 5 millisecond then the whole cycle = 4 x 5 millisecond = 20 millisecond. The duration of each square block is calibrated from a switch called (Time/Division).
- 28. How it works (2) The Y-axes square blocks represent the voltage amplitude of the signal, each square is represent a voltage value and this is calibrated through a switch called (volt/division). e.g.: if the a square wave signal occupy a 6 square blocks on the Y-axes and each block is equal to 1 volt then the peak to peak amplitude of the signal = 1 volt x 6 = 6 volts. The oscilloscope is connected like the voltmeter, i.e. in parallel with
- 29. Example: Square Waveform on the oscilloscope display Every vertical square block represents voltage amplitude (volt/division) Every horizontal square block represents time the wave occur in it (time/division) One complete cycle Peak to Peak voltage
- 30. Example (continue): If the time/division switch is calibrated on 1 millisecond/division and the volt/division switch is Calibrated on 5 volts/division, then: For one complete cycle it takes two divisions (two horizontal square blocks), and it take from peak to peak amplitude two divisions (two vertical square blocks), then: The whole duration of the waveform = 1ms/division x 2 = 2 millisecond. The signal voltage = 5 volt/division x 2 = 10 volts. Enjoy your signal ☺