The EXTECH MG300 is a True RMS multimeter and insulation resistance tester designed for heavy-duty use with a waterproof, rugged design. It supports wireless data transmission to a PC when linked properly.
This manual details the device's capabilities, including measurements of AC/DC voltage, current, resistance, capacitance, frequency, duty cycle, diode testing, continuity, and thermocouple temperature. It also provides specific safety instructions and step-by-step operating procedures for various measurement functions.
The meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Duty Cycle, Diode Test, Insulation Resistance, Continuity, and Thermocouple Temperature.
The meter has an input protection limit of 1000VDC/AC rms.
You must not make 20A current measurements for longer than 30 seconds.