Using the Fluke 373 True RMS Clamp Meter is quite straightforward. For measuring AC current, just open the fixed jaw and place the conductor inside. The meter will show the current reading on the large backlit display. When measuring voltage, connect the test lead set properly. For AC voltage, make sure to check if the circuit is suitable for measurement. For DC voltage, pay attention to the polarity. When measuring resistance, ensure the circuit is powered off. As for maintenance, keep the meter clean and dry. Avoid exposing it to extreme temperatures or humidity. The soft carrying case is provided to protect the meter during transport. Refer to the user manual for detailed troubleshooting and calibration steps if needed.