What should be done if a multimeter is showing unusual readings?

When a multimeter is displaying unusual readings, it's critical to inspect and test the multimeter as the first step. This ensures that the device is functioning properly and allows you to identify any potential issues that may be affecting its accuracy.

Inspecting includes checking the physical condition of the multimeter for visible signs of damage, such as cracked displays or loose connections. Testing involves verifying the calibration of the multimeter by checking it against known standards or reference sources. This can help ascertain whether the readings are due to a malfunctioning device or if there might be external factors affecting the measurement.

Continuing to use the multimeter without making any changes can lead to incorrect readings, which can subsequently cause misinformation in your electrical work or testing. Replacing the multimeter outright may not be necessary if the readings can be corrected through inspection and recalibration. Lastly, checking only the battery limits the diagnostic process, as battery issues are just one of many possible reasons for unusual readings. Therefore, thoroughly inspecting and testing the multimeter provides a comprehensive approach to troubleshooting and ensuring reliability in measurements.