What are common errors associated with measurement tools?

The selection highlighting both measuring ohms on a live circuit and connecting a meter to a voltage source configured for inline amp measurements identifies significant safety concerns when using measurement tools.

Measuring resistance or ohms on a live circuit can lead to severe damage not only to the multimeter itself but also poses a risk of electrical shock to the operator. Resistance measurements require the circuit to be de-energized to avoid incorrect readings and potential hazards. When a current is present, the meter may create a short circuit, leading to high current through the meter that it isn't designed to handle in that mode.

Connecting a meter set for current measurement, or ampere mode, to a voltage source can also be dangerous. This action effectively shorts the voltage source, as the meter tries to measure the current flowing; if the circuit isn't designed to handle that situation, it can cause excessive current to flow through the meter, which can damage the instrument and create risks of injury from overheating or even sparks.

Both these actions illustrate a misunderstanding of the appropriate use of testing equipment and highlight the importance of ensuring that circuits are properly prepared and meters are configured correctly to prevent accidents.