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R Measurements
Bio Med Tech course 1
Question | Answer |
---|---|
When measuring resistance your function switch must be set to? | Ohms Ω |
What are the two positions for Ohms Ω on the digital multimeter? | There is Ω and 20MΩ on the meter. Use Ω for resistance less than 2MΩ. Use 20MΩ for resistance between 2MΩ and 20MΩ |
How does the Ohm Ω scale read on a analog multimeter? | It reads from right to left from 0 to ∞ or infinity. |
How do you place the test leads in the multimeter when measuring resistance/Ohms Ω. | Place the black lead in the common jack and the red lead in the ohm Ω jack. |
How do you scale for resistance measurements? | You need to multiply the number that the needle is pointing to by the range selected. |
If 100 ohms is measured with the range set on X1 what value will you have? | The value is 100 Ω (100 x 1) |
If 100 kΩ is measured what do you do? | Set the range to X10k. The value measure is 100 kOhms, (10 X 10k) |
How should you measure resistance in a circuit? | With the power off and the test leads across the resistance being measured |
Because the test lead is not referenced to ground when measuring resistance what happens? | If you place the test leads on either side of the resistor it produces the same result. |
What happens if you open the path between two resistors? | You will only be able to read one resistor |
What could happen if you measure resistance with the power on? | You can cause severe damage to the meter or injury to youself |
Which control zeros the ohm scale on a analog multimeter? | Zero ohm adjust |
Can you measure resistance on a wire? | No you must have a resistor. |
Where should the needle point when measuring a 1M ohm resistor? | 100 with the range switch on X10k |
To obtain the closest mid-scale reading on the meter, where should the needle point when measuring 10 kohm resistor? | 10 with the range switch on X1k |