USER MANUAL True RMS AutoSensingTM Multimeter + NCV Model MN30 Please visit www.extech.
Introduction Thank you for selecting the Model MN30 True RMS AutoSensingTM Multimeter with Non-contact Voltage Detector (NCV). The MN30 automatically senses AC Voltage, DC Voltage or Resistance/Continuity measurement types. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.com) to check for the latest version of this User Manual, Translations, Product Updates, Product Registration, and Customer Support.
Safety Information To ensure the safe operation and service of the meter, follow these instructions closely. Failure to observe warnings can result in severe injury. WARNINGS WARNINGS identify hazardous conditions that could cause BODILY HARM or DEATH. • • • • • • • • • • • • Keep hands and fingers behind the finger guards at all times. Remove test leads before opening the meter. Use the meter only as specified in this User Manual. Use the proper terminals when taking measurements.
Meter Description 1. 2. 3. 4. 5. 6. 7. 8. LCD Display Hold (H) button NCV Non-Contact Voltage button Flashlight button Power button Flashlight NCV LED Lamp Test leads Note: Test lead holders, battery compartment are on rear of unit. Push-Button Descriptions Power button Press for at least 3 seconds to power on the meter. Press again for 3 seconds to power off. H (HOLD) button Short press to freeze displayed reading (H icon is visible). Press again to release the reading.
Operating Instructions WARNING: Risk of electrocution. High-voltage circuits are very dangerous and should be measured with care. Meter Power Press and hold the power button for approximately 3 seconds to power on the meter. The LCD will display ‘ALL’. Auto Power OFF (APO) APO turns the meter off after 15 minutes of inactivity. Flashlight The MN30 has an flashlight to make working in dark areas easier. Press the button to power ON the flashlight. Press again to power OFF the flashlight.
Resistance Measurements WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking resistance measurements. 1. Press the power button for 3 seconds to power the meter. 2. Touch the test probe tips across the circuit. Disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading. 3. Read the measured resistance on the display. 4.
2. The LCD screen will display ‘---‘ in the NCV mode. 3. Hold the meter top near a source of AC voltage. The test leads are not necessary in NCV mode. 4. The front LED lamp will flash and the meter will beep when an AC voltage is sensed. 5. The meter’s voltage detection ability is affected by varying electrical outlet designs and insulation thicknesses/types. Always check the NCV function on a known live circuit before testing.
Specifications Specifications stated for ambient conditions 23oC ±5oC (73.4oF ±9oF); Relative Humidity < 75% Function Range Resolution Accuracy DC Voltage 1 to 600 V 0.01V ±(1.5% of rdg + 3 dgts) Max input voltage ±600V AC Voltage 1 to 600 V 0.01V ±(1.8% rdg + 3 dgts) (50-60Hz) Max input voltage ±600V Resistance 1Ω to 200Ω 1Ω ±(2.5% rdg + 4 dgts) 200Ω to 10MΩ 1Ω ±(2% rdg + 3 dgts) Resistance notes: Open circuit voltage 1V approx.
