Using the Fluke 376 FC is a breeze. First, make sure the 2 AA batteries are properly installed. To measure current, if you're dealing with large or oddly - shaped conductors, use the 18 - inch iFlex Flexible Current Probe. For regular measurements, the clamp can be used. You can connect the meter to your smartphone via Fluke Connect. Once connected, you can read measurements on your phone from a safe spot, which is great as it reduces the need for a lot of protective equipment. When taking measurements, ensure the voltage doesn't exceed 1000 V between any terminal and earth ground. The meter can operate in temperatures from - 10 °C to +50 °C, so avoid using it outside this range. For storage, keep it in the soft carrying case provided, and make sure the storage temperature stays between - 40 °C to +60 °C. Periodically check the batteries and replace them when needed. Also, clean the meter gently with a dry cloth to keep it in good condition.