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CCP AT 121 - AT 121 - Ch6 - Lab 1 - Meter Usage and Setup

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Measuring RESISTANCEAT 121 - Ch6 - Lab 1 - Meter Usage and SetupName: ____________________________________Date: ____________________________________NATEF TASK - VI. ELECTRICAL/ELECTRONIC SYSTEMS7. Demonstrate the proper use of a digital multimeter (DMM) during diagnosis of electrical circuit problems.P-11. By using the diagram below, set the meter up for reading DC VOLTS. Show the placement of the positive and negative leads, and circle the correct knob position. 2. Draw an arrow to show where you can set the meter to read DC Volts. 3. Look where the leads plug in, what is the maximum voltage that this meter can read (DC Volts)? _________4. Set the meter back to read DC Volts. Measure the voltage of the 9 volt battery. Make sure the red lead is on the(+) side of the battery, and the black lead is on the (-) side of the battery. What does the meter read?______________________ Volts DC.5. Now reverse the leads of the meter on the battery so the read lead is on the (-) terminal of the battery, and the black lead is on the (+) terminal of the battery. What does the meter read?______________________ Volts DC.6. What will happen to the meter if the meter is set on OHMS while reading a voltage source such as a battery?_____________________________________________________________________________________1Note: The RANGE button will remove the “AT” on the left hand side of the display. Make sure that you do work with “AT” displayed as it will auto range the meter to the most accurate range. To turn off the RANGE function, press the RANGE. Press and hold the RANGE button again for one second to return back to auto range. The meter is now back to its Auto Range function. Auto Range is the preferred setup.Turn the meter to the OFF Position.7. By using the diagram below, set the meter up for reading OHMS. Show the placement of the positive and negative leads, and circle the correct knob position. 8. What must be removed from the circuit while checking OHMS? _____________________________Note: Never test for Voltage when the unit is in the OHMS position, damage to the meter will result!9. Turn the meter on by selecting the Ohms position. What does the display show? __________________10. Touch the two leads together. What does the display show? __________________________Note: This is the OHMS setting of the meter. The meter in this function can read OHMS. This is useful for locatingareas of HIGH RESISTANCE.12. Touch one lead in you left hand and the other lead in your right hand.What is your resistance? _______________________________________ OhmsWhat is the resistance of the light bulb? _______________________________ Ohms13. Turn the meter to the what changes on the display of the meter? _________________14. Touch the two leads together. What does the display show? __________________________215. Did the meter beep? ____________________________Note: This is the continuity test function of the meter. This is useful for doing a quick check to see if a circuit is complete, or checking a wire for an open. The meter beeps when it completes a circuit.16. Use this function to see when a switch would complete a circuit.When the switch is in this position is it open or closed? ___________________(Continued on the next page)Turn the meter to the OFF Position.17. By using the diagram below, set the meter up for reading DC AMPS. Show the placement of the positive and negative leads, and circle the correct knob position. Note: It is absolutely critical that when checking Volts, Ohms, or Amps that the leads be in the correct position! Damage to the meter or circuit will result! Never read directly across a battery to read amps!18. What is the maximum amperage that can be read while checking mA? __________________19. What is maximum amperage that can be read when the meter is in the DC A setting? ____________________20 . How is a meter set up while measuring current? (Series or Parallel) ___________________Turn the meter to the OFF Position.Note: This is the Amperage setting of the meter. We will go into testing with this function later.3Measuring RESISTANCEL3 ________________________L4 ________________________R1 ________________________ R2 ______________________ R3 _________________R4 ________________________ R5 ______________________ R6 _________________R7 ________________________ R8 ______________________ R9 _________________R10 ________________________ Speaker ____________________This picture shows:A. Measuring ResistanceB. Measuring Voltage DropC. Measuring CurrentD. Measuring VoltageThis picture shows:A. Measuring ResistanceB. Measuring Voltage DropC. Measuring CurrentD. Measuring VoltageThis picture shows:A. Measuring ResistanceB. Measuring Voltage DropC. Measuring CurrentD. Measuring


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