Here are a few things to consider when using a fieldpiece multimeter: - Avoid touching exposed metal pipes, outlets, fixtures, and other items while taking measurements. - Before you open the casing, disconnect the test leads. - Check the test leads for insulation damage or exposed wire. If there is one, replace it. - Keep your fingertips behind the finger protections on the probes when taking measurements. - When possible, perform one-handed testing. High voltage transients can permanently harm the meter. - Never use fieldpiece multimeters during a storm. - Do not pass the clamp's rated 400AAC when measuring high-frequency AC. The RMS clamp meter may become unbearably hot if you don't follow instructions. - Turn the dial to the OFF setting, unplug the test leads, and unscrew the battery cover when replacing the battery.