Question 167Electricity/Electronics - 1st Asst/Chief70% to pass
Prior to using an analog multimeter set up as an ohmmeter, the leads are purposely shorted together. Which of the following actions should be taken if, when adjusting to 'zero' ohms, the indicating needle cannot be returned to 'zero' on the scale?
AI Explanation
The correct answer is D) The batteries should be replaced.
When using an analog multimeter set up as an ohmmeter, the leads are purposely shorted together to adjust the meter to read '0' ohms on the scale. If the indicating needle cannot be returned to '0' when the leads are shorted, it indicates that the battery in the multimeter is low and needs to be replaced. This is because the internal resistance of a weak battery can prevent the ohmmeter from accurately reading '0' ohms when the leads are shorted.
The other answer choices are incorrect because they do not address the root cause of the issue, which is a low battery. Adjusting the readings or replacing the lead clips will not resolve the problem if the battery is the source of the issue.
Related Questions
#165 As shown in figure "A" of the illustrated digital multimeter screen, what would be the significance of the symbol indicated by "1" being illuminated? Illustration EL-0047 #166 If you disconnect and arrange both ends of a conductor of a multi-conductor cable without any contact between the individual conductors, what would a low ohmic value between the ends of a single conductor indicate? #168 A resistance in a circuit of unknown value is to be tested using the voltmeter/ammeter method. How should the two meters be connected? #169 As shown in figure "D" of the illustrated digital power meter, what type of single- phase load is under test for power measurement? Illustration EL-0256 #170 A digital multimeter, set up as a milliammeter on the 100 milliamp scale, is known to have an accuracy of plus or minus 2%. A display reading of 10.0 milliamps would indicate an actual line current between what two values?