MEASURING RESISTANCE.pptxfbbbbbbbbbbbbbb

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1. GOOD MORNING, CLASS!

2. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material.

3. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material.

4. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material.

5. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material. ANSWER: No, electricity cannot pass through because rubber is an insulator.

6. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material. ANSWER: No, electricity cannot pass through because rubber is an insulator.

7. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material. ANSWER: No, electricity cannot pass through because rubber is an insulator.

8. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material. ANSWER: No, electricity cannot pass through because rubber is an insulator. ANSWER: Yes, electricity can pass through because metal is a conductor.

9. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material. ANSWER: No, electricity cannot pass through because rubber is an insulator.

10. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) What is MULTIMETER? Measuring Resistance Can Electricity Pass Through? ANSWER: Yes, electricity can pass through because the filament inside is made of conductive material. ANSWER: No, electricity cannot pass through because rubber is an insulator. ANSWER: Yes, but only through the graphite core, which conducts electricity moderately.

11. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the steps in measuring resistance using an analog multi-tester. Demonstrate the proper way of measuring resistance safely. Appreciate the importance of accurate resistance measurement in troubleshooting electrical components.

12. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the steps in measuring resistance using an analog multi-tester. Demonstrate the proper way of measuring resistance safely. Appreciate the importance of accurate resistance measurement in troubleshooting electrical components. WHAT IS RESISTANCE?

13. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the steps in measuring resistance using an analog multi-tester. Demonstrate the proper way of measuring resistance safely. Appreciate the importance of accurate resistance measurement in troubleshooting electrical components. WHAT IS RESISTANCE? Resistance is how much something slows down the flow of electricity. Some materials let electricity flow easily (like metal), while others block or slow it down (like rubber or plastic). Resistance is measured in ohms (Ω)—the higher the number, the harder it is for electricity to pass through.

14. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? Measuring Resistance

15. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? Measuring Resistance 1.) Set the multimeter to Ohms or Resistance. Turn the meter on if it has a separate power switch. When multimeter measures resistance in ohms, it cannot measure continuity because resistance and continuity are opposites. When there is little resistance, there will be a great deal of continuity, and vice versa.

16. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? 2.) Observe the meter indication. If the test leads are not in contact with anything, the needle or pointer of an analog meter will rest at the left-most position. This represents an infinite amount of resistance, or an "open circuit." It's safe to say there is the no continuity, or path between the black and red probes. Measuring Resistance

17. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? 3 .) Connect the test leads. Connect the black test lead to the jack marked "Common" or "-". Then, connect the red test lead to the jack marked with the Omega (Ohm symbol) or letter "R" near it. Measuring Resistance

18. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? 4.) Hold the probes at the end of the test leads together. The meter pointer should move fully to the right. Locate the "Zero Adjust" knob and rotate it so that the meter indicates "0" (or as close to "0" as possible). Measuring Resistance

19. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? 5 .) Measure the resistance of something like a light bulb that you know is good. Locate the two electrical contact points of the bulb. They will be the threaded base and the center of the bottom of the base. Measuring Resistance

20. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? 6.) Try different ranges. Change the range of the meter to R x 1. Zero the meter again for this range and repeat the step above. Observe how the meter did not go as far to the right as before. Measuring Resistance

21. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? 7 .) Try different ranges. Change the range of the meter to R x 1. Zero the meter again for this range and repeat the step above. Observe how the meter did not go as far to the right as before. Measuring Resistance

22. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? 8.) Make sure your reading is accurate. It's very important that the probes not touch anything other than the device being tested. A device that has burned out will not show "open" on the meter when testing if your fingers provide an alternate path around the device, like when they are touching the probes. Measuring Resistance

23. Testing Electronic Components Prepared by: John Kenneth T. Reotan OBJECTIVES Identify the parts of an analogue multi-tester. Measure some electronic components. Practice safety while measuring electronic components. Multimeters may use analog or digital circuits—analog multimeters and digital multimeters (often abbreviated DMM or DVOM.) 123456 Find the Zero Adjustment knob. This is a small knob usually located near the dial that is labeled "Ohms Adjust," "0 Adj," or something similar. This is used only in the ohms or resistance range, while the probes are shorted together (touching each other). What is MULTIMETER? Activity: Group Work Divide the class into two groups. Each group will measure the resistance of a light bulb. They will record their readings and compare results with the expected values.