Introduction
Congratulations on your purchase of Extech model MT310, MT320, or MT330 digital multimeter. Properly used, this meter
will provide many years of reliable service. All models measures AC/DC Voltage/Current, Resistance, Frequency and
Capacitance. All models are Autoranging and include a PC Interface feature.
The MT320 and MT330 also measure
temperature. The Model MT330 is True RMS responding.
Safety
International Safety Symbols
Refer to the manual Hazardous voltages Double insulation
for further information may be present.
UL Listed
The UL mark does not indicate that this product has been evaluated for the accuracy of its readings.