Answer :
Final answer:
It is true that test leads must be disconnected when changing the function select dial on a multimeter. This safety measure prevents damage to the multimeter, the circuit, and protects the user from potential harm due to voltage spikes or incorrect settings.
Explanation:
The statement 'Test leads must be disconnected when changing the function select dial' is True. Changing the function or range on a multimeter while the test leads are connected can lead to damage to the multimeter, the circuit under test, or can cause physical harm to the user if a voltage spike occurs or if the device is accidentally set to measure current while connected to a voltage source.
Therefore, to maintain safety and ensure the accuracy of measurements, it is essential to disconnect the test leads from the device being measured before selecting a different function or range. This is especially true when changing from a voltage measurement to a current measurement, as the internal structure of the meter changes to allow current to flow through it for the measurement, potentially causing a short circuit if connected to a voltage source.
Always refer to the manufacturer's instructions and safety guidelines when using any measurement equipment to explain proper operation procedures.
