Using the Greenlee DM-820A digital multimeter is quite straightforward. First, insert the 9V battery that comes with it. Then, you can connect the test leads to the appropriate terminals for different measurements like voltage, current, resistance, etc. When measuring current, make sure to insert the test leads correctly, or the BeepJack will warn you. For temperature measurement, use the bead temperature probe, but remember its maximum temperature limit is 400°F/204°C. The backlit LCD with dual 10,000 count displays makes it easy to read the measurements, even in low - light conditions. You can choose between automatic and manual range selection according to your needs. The relative offset mode is handy when you want to see the changes in your measurements. If you need to record data, you can use the data hold function and connect the multimeter to your PC via the optional USB interface DMSC - 9U. As for maintenance, keep the multimeter in the provided carrying case to protect it from damage. Wipe it clean with a soft, dry cloth regularly. And don't forget, this multimeter comes with a lifetime limited warranty, so if you have any issues, you can get support.
