Final answer:
Both Technician A and Technician B are partially correct. Not all digital multimeters use auto ranging, and many have the option to switch off auto ranging for manual range selection.
Step-by-step explanation:
The question deals with the functionality and features of digital multimeters used in measuring electrical values such as voltage, current, and resistance. Technician A suggests that all digital multimeters come with auto ranging capabilities which automatically select the appropriate scale for amps, ohms, and volts. However, this statement is not entirely accurate, as some digital multimeters require manual selection of range. Technician B points out that for many digital multimeters, the auto ranging function can indeed be turned off, allowing the user to select the range manually. This is particularly useful in situations where the user needs more control over the measurement, or when the automatic ranging does not give an accurate reading due to the complexity of the circuit being tested.
Digital multimeters are essential tools in the field of electronics and electrical engineering. They are used to measure voltage, which is the potential difference between two points in a circuit, and measure current, which is the rate at which charge is flowing through a conductor. These multimeters can also be employed to measure resistance using an ohmmeter function, which requires the component to be disconnected from the circuit to get an accurate reading. Multimeters that can switch between auto ranging and manual ranging provide greater flexibility for diagnosing and troubleshooting electrical systems.