Inspect the tester for damage before use
Verify the tester works on a known live source
Read the manufacturer’s instructions for your specific model
Select the correct voltage range if your tester has one
Hold the tester by the insulated grips only
Touch the probe tips to the test points or outlet slots
Check the indicator lights or display for the voltage reading
Test both hot-to-neutral and hot-to-ground when needed
Confirm absence of voltage before touching any conductors
Recheck the tester on a known live source after testing
Replace batteries if the tester gives weak or inconsistent readings
Store the tester in a dry, protected place