Extech Instruments EX330 User Manual
Mini multimeter with non-contact voltage detector
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Table of Contents
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Table of Contents
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Summary of Contents for Extech Instruments EX330
- Page 1 User's Guide Mini Multimeter with Non-Contact Voltage Detector (NCV) Model EX330...
- Page 2 Introduction Congratulations on your purchase of the Extech EX330 Meter. The EX330 offers AC/DC Voltage, AC/DC Current, Resistance, Diode, Continuity, non-contact Voltage Detection, Capacitance, Frequency, Duty Cycle, and Temperature (Type K) functions. Proper use and care of this meter will provide many years of reliable service.
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Page 3: Safety Instructions
NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. EX330-EU-ENG – V4.2 1/08... - Page 4 Expired or damaged batteries can cause cauterization on contact with the skin. Always, therefore, use suitable hand gloves in such cases • See that the batteries are not short-circuited. Do not throw batteries into the fire. EX330-EU-ENG – V4.2 1/08...
- Page 5 Farads (capacitance) Ω mega (10 ) (ohms) Ohms Hertz (frequency) Volts Percent (duty ratio) Relative Alternating current AUTO Autoranging Direct current HOLD Display hold ºF Degrees Fahrenheit ºC Degrees Centigrade •))) Continuity Diode test Battery status EX330-EU-ENG – V4.2 1/08...
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Page 6: Non-Contact Ac Voltage Detector
Hold the top of the meter very close to the voltage source as shown. If voltage is present, the rim of the LCD display will flash a bright orange and an audible warning will sound. EX330-EU-ENG – V4.2 1/08... -
Page 7: Ac Voltage Measurements
Touch the red test probe tip to the “hot” side of circuit. Read the voltage in the display. If the measured AC voltage exceeds the highest range of the meter (refer to the specification table) an audible tone will sound. EX330-EU-ENG – V4.2 1/08... -
Page 8: Dc Voltage Measurements
Insert the red test lead banana plug into the positive V jack. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. Read the voltage in the display. EX330-EU-ENG – V4.2 1/08... -
Page 9: Ac / Dc Current Measurements
Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. Apply power to the circuit. Read the current in the display. EX330-EU-ENG – V4.2 1/08... -
Page 10: Resistance Measurements
Touch the test probe tips to the circuit or wire you wish to check. If the resistance is less than approximately 100Ω, the audible signal will sound. If the circuit is ‘open’ (bad), the display will indicate “OL”. EX330-EU-ENG – V4.2 1/08... -
Page 11: Diode Test
Touch the test leads to the capacitor to be tested. The test may take up to 3 minutes or more for large capacitors to charge. Wait until the readings settle before ending the test. Read the capacitance value in the display EX330-EU-ENG – V4.2 1/08... -
Page 12: Frequency Measurements
Allow 30 seconds for the display to stabilize. Read the temperature in the display. Note: The temperature range of the supplied thermocouple probe is -20 to 250°C (-4 to 482°F) EX330-EU-ENG – V4.2 1/08... -
Page 13: Auto-Manual Range Selection
The meter will automatically turn off after 15 minutes of inactivity. This will conserve battery energy. To turn the meter on after an Auto Power OFF, simply turn the rotary switch to OFF and then back to the desired setting. EX330-EU-ENG – V4.2 1/08... -
Page 14: Maintenance
TYPE. Remove old or weak batteries so they do not leak and damage the unit. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the batteries should be removed to prevent damage to the unit. EX330-EU-ENG – V4.2 1/08... -
Page 15: Low Battery Indication
Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle WARNING: To avoid electric shock, do not operate the meter until the batteries and the fuses are in place and fastened securely. EX330-EU-ENG – V4.2 1/08... -
Page 16: Replacing The Fuses
Always use fuses of the proper size and value (500mA/250V fast blow for the mA / µA ranges, 10A/250V fast blow for the A range). Secure the fuse/battery compartment cover. Place the protective rubber holster on the meter. EX330-EU-ENG – V4.2 1/08... -
Page 17: Specifications
±(2.5% reading + 5 digits) AC Current ±(1.5% reading + 5 digits) 400μA 0.1μA (A AC) 4000μA 1μA (50 / 60Hz) ±(1.8% reading + 5 digits) 40mA 0.01mA 400mA 0.1mA 0.01A ±(3.0% reading + 7 digits) EX330-EU-ENG – V4.2 1/08... - Page 18 Accuracy is stated at 65 F to 83 F (18 C to 28 C) and less than 75% RH. UL LISTED The UL mark does not indicate that this product has been evaluated for the accuracy of its readings. EX330-EU-ENG – V4.2 1/08...
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Page 19: General Specifications
The meter also meets UL 61010-1, Second Edition (2004), CAN/CSA C22.2 No. 61010-1, Second Edition (2004), and UL 61010B-2-031, First Edition (2003) The UL mark does not indicate that this product has UL LISTED been evaluated for the accuracy of its readings. EX330-EU-ENG – V4.2 1/08... - Page 20 Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. Note – Examples include electricity meters and primary over-current protection equipment Copyright © 2008 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form. www.extech.com EX330-EU-ENG – V4.2 1/08...
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