Using the Milwaukee 2224-20 Digital GFCI Receptacle Tester is easy. First, make sure you insert two AAA batteries into the tester. Then, plug the tester into the electrical outlet you want to check. The LCD screen will show you the wiring conditions, voltage, and trip time. Keep an eye on the LED visual indicators to quickly identify any wiring issues. As for safety, always use the tester within the 135V AC voltage limit specified by the CAT II 135V safety rating. Don't expose it to excessive moisture or extreme temperatures. When it comes to maintenance, if the tester is dropped, check for any visible damage before using it again. It's built to withstand a 6 - foot drop, but it's better to be safe. Also, replace the batteries when the power gets low. If you have any problems with the tester, remember it comes with a 2 - year warranty, so you can reach out to the manufacturer for help.
