Extech EX310 Manual PDF
Contents
1. 4 Read the voltage in the display AC DC CURRENT MEASUREMENTS CAUTION Do not make current measurements at 10 Amps for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 200mA AC or DC set the function switch to the 200m AAC or ADC position and insert the red test lead banana plug into the mA jack 3 For current measurements up to 10A AC or DC set the function switch to the 10A AAC or 10A ADC position and insert the red test lead banana plug into the 10A jack 4 Remove power from the circuit under test then open up the circuit at the point where you wish to measure current 5 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 6 Apply power to the circuit 7 Read the current in the display 6 Model EX310 Version 7 1 05 2006 RESISTANCE MEASUREMENTS WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements 1 Set the function switch to the highest Q position 2 Insert the black test lead banana plug into the negative COM jack 3 Insert the red test lead banana plug into the positive Q jack 4 Touch the test probe tips across the circuit or part under test It is best t2. AC Voltage Detector Sensor AC Voltage Detector indicator light LCD display Non contact AC Voltage Detector test button Rotary function dial 10 ampere test lead jack COM test lead jack Test lead jack for voltage milliamp resistance continuity and diode functions OY Oy Or ge ON os o Protective rubber holster must be removed to access the rear battery compartment Symbols Continuity Dt Diode a Battery status FYI AC mem DC m milli 10 volts amps k kilo 10 ohms V Volts A Amps Q Ohms AC Alternating current DC Direct current 3 Model EX310 Version 7 1 05 2006 Operating Instructions WARNING Risk of electrocution High voltage circuits both AC and DC are very dangerous and should be measured with great care NOTE On some low AC and DC voltage ranges with the test leads not connected to a device the display may show a random changing reading This is normal and is caused by the high input sensitivity The reading will stabilize and give a proper measurement when connected to a circuit NON CONTACT AC VOLTAGE DETECTOR The EX310 can detect the presence of AC voltage from 100 to 600VAC simply by being held very near to a voltage source WARNING Test the AC voltage detector on a known live circuit before each use WARNING Before using the meter in the AC Voltage Detector mode verify that the battery is fresh by confirming characters appear on the LCD when
3. protected electronic circuits OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY Il is energy consuming equipment to be supplied from the fixed installation Note Examples include household office and laboratory appliances OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations Note Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation OVERVOLTAGE CATEGORY IV 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 Warranty 13 Model EX310 Version 7 1 05 2006 EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website at www extech com A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse
4. the function dial is turned to any position Do not attempt to use the meter as an AC Voltage Detector if the battery is weak or bad NON CONTACT VOLTAGE NCV The NCV function works on any rotary switch position 1 Test the detector on a known live circuit before use 2 Press and hold the NCV button for the duration of the test The meter will beep once when the button is pushed 3 Hold the top of the meter very close to the voltage source as shown 4 If voltage is present the rim of the LCD display will flash a bright orange and an audible warning will sound 4 Model EX310 Version 7 1 05 2006 AC VOLTAGE MEASUREMENTS WARNING Risk of Electrocution The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets As a result the reading may show 0 volts when the outlet actually has voltage on it Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present CAUTION Do not measure AC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the 600 VAC position 2 Insert the black test lead banana plug into the negative COM jack Insert red test lead banana plug into the positive V jack 3 Touch the black test probe tip to the neutral side of the circuit Touch t
5. User s Guide EXT INSTRUMENTS Mini Multimeter with Non Contact Voltage Detector NCV Model EX310 Non Contact Voltage Detector Test on known live circuit before each use CAT Ill 600V CAT II 1000V V Q mA Introduction Congratulations on your purchase of the Extech EX310 MultiMeter The EX310 offers AC DC Voltage AC DC Current Resistance Diode and Continuity testing plus a built in non contact Voltage Detector Proper use and care of this meter will provide many years of reliable service Safety ile This symbol adjacent to another symbol terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter WARNING This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product MAX This symbol advises the user that the terminal s so marked must not be 600V connected to a circuit point at which the voltage with respect to earth ground exceeds 600V This symbol adjacent to one or more terminals identifies them as being associated with ranges that may in normal use be subjected to particularly hazardous voltages For maximum safety the meter and its test leads should not be handled when these terminal
6. ge 2 3VDC Audible signal will sound if the resistance is less than 100Q 10MQ VDC amp VAC 50 60Hz 2000 count 0 to 1999 LCD 1 is displayed Automatic no indication for positive Minus sign for negative 2 times per second nominal is displayed if battery voltage drops below operating voltage One 1 9V battery mA range 200mA 250V fast blow A range 10A 250V fast blow ceramic 32 F to 122 F 0 C to 50 C 4 F to 140 F 20 C to 60 C Max 70 up to 87 F 31 C decreasing linearly to 50 at 122 F 50 C lt 80 RH 7000 ft 2000 meters maximum Weight 9 17 oz 260g includes holster Size 5 8 x 2 9 x 1 6 147 x 76 x 42mm includes holster Approvals CE UL Safety This meter is intended for indoor use and protected against the users by double insulation per EN61010 1 and IEC61010 1 2nd Edition 2001 to CAT II 1000V amp CAT III 600V Pollution Degree 2 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 UL LISTED The UL mark does not indicate that this product has been evaluated for the accuracy of its readings PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY Equipment of OVERVOLTAGE CATEGORY is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level Note Examples include
7. he red test probe tip to the hot side of circuit 5 Read the voltage in the display DC VOLTAGE MEASUREMENTS CAUTION Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the highest VDC position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 3 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 4 Read the voltage in the display Move the function switch to successively lower VDC positions to obtain a higher resolution reading 5 Model EX310 Version 7 1 05 2006 BATTERY VOLTAGE TEST CAUTION Do not measure batteries while they are installed in the devices they are powering The batteries must be removed from installations before tests can be made 1 Set the function switch to the 1 5V or 9V BAT switch position Use the 1 5V position for AAA AA C D and other 1 5V batteries Use the 9V position for square 9V transistor batteries 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 3 Touch the black test probe tip to the negative side of the battery Touch the red test probe tip to the positive side of the battery
8. improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers complete repair and calibration services for most of the products we sell For periodic calibration NIST certification or repair for most Extech products call customer service for details Extech recommends that calibration be performed on an annual basis to ensure calibration integrity a Support line 781 890 7440 Technical support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website www extech com Extech Instruments Corporation 285 Bear Hill Rd Waltham MA 02451 Copyright 2005 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 14 Model EX310 Version 7 1 05 2006
9. o disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading 5 Read the resistance in the display Move the function switch to successively lower Q positions to obtain a higher resolution reading CONTINUITY CHECK WARNING To avoid electric shock never measure continuity on circuits that have a voltage potential 1 Set the function switch to the position 2 Insert the black lead banana plug into the negative COM jack 3 Insert the red test lead banana plug into the positive Q jack 4 Touch the test probe tips to the circuit or wire you wish to check 5 If the resistance is less than approximately 100Q the audible signal will sound If the circuit is open the display will indicate 1___ 7 Model EX310 Version 7 1 05 2006 DIODE TEST 1 Set the function switch to the gt position 2 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive jack 3 Touch the test probes to the diode under test 4 A good diode will indicate approx 700 ohms for the forward test and 1 for the reverse test 5 A shorted diode will indicate the same value of resistance in both the reverse and forward test directions An open diode will indicate 1___ in both test directions 8 Model EX310 Version 7 1 05 2006 Maintenance WARNING To avoid electric sh
10. ock disconnect the test leads from any source of voltage before removing the back cover or the battery or fuse covers WARNING To avoid electric shock do not operate your meter until the battery and fuse covers are in place and fastened securely This MultiMeter is designed to provide years of dependable service if the following care instructions are performed 1 2 3 KEEP THE METER DRY If it gets wet wipe it off USE AND STORE THE METER IN NORMAL TEMPERATURES Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts HANDLE THE METER GENTLY AND CAREFULLY Dropping it can damage the electronic parts or the case KEEP THE METER CLEAN Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND 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 battery should be removed to prevent damage to the unit 9 Model EX310 Version 7 1 05 2006 BATTERY INSTALLATION and LOW BATTERY INDICATION LOW BATTERY INDICATION The a icon will appear in the lower left hand corner of the display when the battery voltage becomes low Replace the batteries when this appears BATTERY REPLACEMENT Disconnect the test leads from the meter Remove the protective rubber holster See diagram Remove the Phillips head sc
11. on Accuracy Non contact AC 100 to 600V Resolution amp accuracy do not apply since the meter does Voltage detector not display the voltage in this mode The lamp at the top of the meter s display flashes when voltage is sensed and an audible warning will sound DC Voltage 200mV 0 1mV 0 5 reading 2 digits V DC 2000mV 1mV 20V 0 01V 1 0 reading 2 digits 200V 0 1V 600V 1V 1 5 reading 2 digits AC Voltage 200V 0 1V 1 5 reading 3 digits VAC 50 60Hz 7 F 600V 1V 2 0 reading 4 digits DC Current 200mA 0 1mA 1 5 reading 2 digits ADC 10A 0 01A 2 5 reading 5 digits AC Current 200mA 0 1mA 1 8 reading 5 digits AAC 50 60HZ 10A 0 01A 3 0 reading 7 digits Resistance 2009 0 10 1 2 reading 4 digits 20009 1Q 20kQ 0 01kQ 1 2 reading 2 digits 200kQ 0 1kQ 2000kQ 1kQ Notes Accuracy specifications consist of two elements e reading This is the accuracy of the measurement circuit e digits This is the accuracy of the analog to digital converter Accuracy is stated at 65 F to 83 F 18 C to 28 C and less than 75 RH 12 Model EX310 Version 7 1 05 2006 General Specifications Diode Test Continuity Check Input Impedance AC Bandwidth Display Overrange indication Polarity Measurement Rate Low Battery Indication Battery Fuses Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Bias volta
12. rew located on the lower back of the instrument Remove the fuse battery compartment cover to access the battery See diagram Replace the 9V battery observing polarity Secure the fuse battery compartment cover using the Phillips head screw NO nO fF WN Place the protective rubber holster on the meter 1 Removable Rubber Holster 2 Meter 3 Battery 4 Fuses 5 Compartment Cover 6 Rubber Holster 10 Model EX310 Version 7 1 05 2006 REPLACING THE FUSES WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the fuse cover Disconnect the test leads from the meter Remove the protective rubber holster Remove the Phillips head screw located on the lower back of the instrument Remove the fuse battery compartment cover to access the fuses Gently remove the fuse s and install new fuse s into the holder s OP OT Be FOO NS Always use fuses of the proper size and value 200mA 250V fast blow for the mA UA ranges 10A 250V fast blow for the A range Secure the fuse battery compartment cover N Place the protective rubber holster on the meter WARNING To avoid electric shock do not operate your meter until the fuse cover is in place and fastened securely 11 Model EX310 Version 7 1 05 2006 Range Specifications Function Range Resoluti
13. s are energized This symbol indicates that a device is protected throughout by double insulation or reinforced insulation SAFETY INSTRUCTIONS This meter has been designed for safe use but must be operated with caution The rules listed below must be carefully followed for safe operation NEVER apply voltage or current to the meter that exceeds the specified maximum Input Protection Limits Function Maximum Input V DC or VAC 600V AC and DC mA AC DC 200mA DC AC AAC DC 10A DC AC for 30 seconds max every 15 mins Resistance Diode Test Continuity 250V DC AC 2 USE EXTREME CAUTIONWhen working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 600V above earth ground 4 NEVERconnect the meter leads across a voltage source while the function switch is in the current resistance or diode mode Doing so can damage the meter 5 ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests 6 ALWAYS turn off power and disconnect test leads before opening the covers to replace the fuse or battery 7 NEWERoperate the meter unless the back cover and the battery and fuse covers are in place and fastened securely 8 Ifthe equipmentis used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 2 Model EX310 Version 7 1 05 2006 Controls and Jacks
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