Saving new step-by-step photos ←Older revision Revision as of 00:01, 25 June 2019 Line 18: Line 18:   #*Another source of p...

Use an Ohmmeter

Saving new step-by-step photos

←Older revision Revision as of 00:01, 25 June 2019
Line 18: Line 18:
 
#*Another source of power isn't necessary since your ohmmeter will supply all of the voltage and current for your circuit.  
 
#*Another source of power isn't necessary since your ohmmeter will supply all of the voltage and current for your circuit.  
 
#*Trying to use an ohmmeter on a powered circuit can cause damage to the meter, the circuit, and you.
 
#*Trying to use an ohmmeter on a powered circuit can cause damage to the meter, the circuit, and you.
#Set your ohmmeter to the appropriate scale, if possible. Turn the dial in the center of your ohmmeter to change the scale of the reading, from tens, to hundreds, to thousands, and so on. For best results, turn your meter to the lowest scale that is higher than the resistance of what you’re measuring.<ref>http://bit.ly/2wW4kaw>
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#Set your ohmmeter to the appropriate scale, if possible. Turn the dial in the center of your ohmmeter to change the scale of the reading, from tens, to hundreds, to thousands, and so on. For best results, turn your meter to the lowest scale that is higher than the resistance of what you’re measuring.<ref>http://bit.ly/2wW4kaw>[[Image:Use an Ohmmeter Step 6 Version 4.jpg|center]]
 
#*For example, if you expect the circuit you’re measuring to have a resistance of 1100 ohms, then your ohmmeter should be set to X100. This means, a reading of “11” on your ohmmeter would be equal to 1100 ohms.
 
#*For example, if you expect the circuit you’re measuring to have a resistance of 1100 ohms, then your ohmmeter should be set to X100. This means, a reading of “11” on your ohmmeter would be equal to 1100 ohms.
 
#*Note that you can only do this if you have an idea of what the resistance of what you’re measuring ought to be.
 
#*Note that you can only do this if you have an idea of what the resistance of what you’re measuring ought to be.
 
#Touch the 2 probes to oppose ends of the circuit. Place 1 probe on 1 end of the circuit and place the other probe on the other end. Note that it doesn’t matter which probe is touched to which end of the circuit.<ref>https://sciencing.com/use-ohmmeter-test-ac-transformer-7812347.html</ref>
 
#Touch the 2 probes to oppose ends of the circuit. Place 1 probe on 1 end of the circuit and place the other probe on the other end. Note that it doesn’t matter which probe is touched to which end of the circuit.<ref>https://sciencing.com/use-ohmmeter-test-ac-transformer-7812347.html</ref>
 
#*Because you’re measuring the resistance in the circuit and resistance doesn’t change with the direction of current flow, the positive probe and the negative probe can be on either end of the circuit to get an accurate resistance reading.
 
#*Because you’re measuring the resistance in the circuit and resistance doesn’t change with the direction of current flow, the positive probe and the negative probe can be on either end of the circuit to get an accurate resistance reading.
#Read the number on your ohmmeter to find the circuit’s resistance. This number, multiplied by the scale that your meter is set to, is equal to the circuit’s resistance in ohms. The lower the resistance, the easier it is for current to flow through the circuit.<ref>https://www.youtube.com/watch?v=ocvaqGzvE2I#t=20s</ref>
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#Read the number on your ohmmeter to find the circuit’s resistance. This number, multiplied by the scale that your meter is set to, is equal to the circuit’s resistance in ohms. The lower the resistance, the easier it is for current to flow through the circuit.<ref>https://www.youtube.com/watch?v=ocvaqGzvE2I#t=20s</ref>[[Image:Use an Ohmmeter Step 8 Version 4.jpg|center]]
 
#*For example, if a circuit has 0 ohms, current would be able to flow through the circuit completely unimpeded.
 
#*For example, if a circuit has 0 ohms, current would be able to flow through the circuit completely unimpeded.
 
#Isolate the components of an electrical circuit to test them individually. Remove the resistor you want to measure from the circuit board by unsoldering the pins with a soldering iron. This will ensure that you’re not getting an inaccurate reading through another path in the circuit.<ref>https://sciencing.com/use-ohmmeter-test-ac-transformer-7812347.html</ref>
 
#Isolate the components of an electrical circuit to test them individually. Remove the resistor you want to measure from the circuit board by unsoldering the pins with a soldering iron. This will ensure that you’re not getting an inaccurate reading through another path in the circuit.<ref>https://sciencing.com/use-ohmmeter-test-ac-transformer-7812347.html</ref>


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