Using the Amprobe AT-6010/KIT is quite straightforward. First, take out the receiver, transmitter, test lead, and digital multimeter from the soft case. Insert the 12 AA batteries into the relevant devices as instructed in the manual. To trace wires, connect the transmitter to the wire you want to trace and use the receiver to detect the signal. When using the digital multimeter, set it to the appropriate mode for voltage, continuity, etc., depending on your needs.
As for safety, always make sure the power is off when working on electrical connections. Avoid using the kit in wet or extremely hot environments. When not in use, store the kit in the soft case to protect it from dust and damage. Periodically check the batteries and replace them if they are low. This will keep your Amprobe AT-6010/KIT in good working condition for a long time.
