Extech Instruments EX310 User Manual

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User's Guide

Mini Multimeter

with Non-Contact Voltage Detector (NCV)

Model EX310

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Model EX310 - Version 7.1 – 05/2006

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

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.

This WARNING symbol indicates a potentially hazardous situation, which

if not avoided, could result in death or serious injury.

This CAUTION symbol indicates a potentially hazardous situation, which

if not avoided, may result damage to the product.

This symbol advises the user that the terminal(s) so marked must not be 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 terminals 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.

1. NEVER apply voltage or current to the meter that exceeds the specified maximum:

Input Protection Limits

Function Maximum Input

V DC or V AC 600V AC and DC

mA AC/DC 200mA DC/AC

A AC/DC 10A DC/AC (for 30 seconds max. every 15 mins.)

Resistance, Diode Test, Continuity 250V DC/AC

2. USE EXTREME CAUTION when working with high voltages.

3. DO NOT measure voltage if the voltage on the "COM" input jack exceeds 600V above earth ground.

4. NEVER connect 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. NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely.

8. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

WARNING

CAUTION

MAX 600V

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Model EX310 - Version 7.1 – 05/2006

Controls and Jacks

1. AC Voltage Detector Sensor

2. AC Voltage Detector indicator light

3. LCD display

4. Non-contact AC Voltage Detector test button

5. Rotary function dial

6. 10 ampere test lead jack

7. COM test lead jack

8. Test lead jack for voltage, milliamp, resistance/continuity, and diode functions

9. Protective rubber holster (must be removed to access the rear battery compartment)

Symbols

•))) Continuity

Diode

Battery status

m milli (10

-3

) (volts, amps)

k kilo (10

) (ohms)

V Volts

A Amps

Ω Ohms

AC Alternating current

DC Direct current

V/ /mA

CATII-600V

EX310

MultiMeter

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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 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.

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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.

4. Touch the 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.

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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.

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.

1.50

V/ /mA

CATII-600V

EX310

MultiMeter

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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 Ω

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 Ω jack.

4. Touch the test probe tips across the circuit or

part under test. It is best to 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 Ω 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 Ω jack.

4. Touch the test probe tips to the circuit

or wire you wish to check.

5. If the resistance is less than

approximately 100Ω, the audible signal will sound. If the circuit is open, the

display will indicate “1___”.

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Model EX310 - Version 7.1 – 05/2006

DIODE TEST

1. Set the function switch to the

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.

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Model EX310 - Version 7.1 – 05/2006

Maintenance

WARNING: To avoid electric shock, 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. KEEP THE METER DRY. If it gets wet, wipe it off.

2. USE AND STORE THE METER IN NORMAL TEMPERATURES. Temperature

extremes can shorten the life of the electronic parts and distort or melt plastic parts.

3. HANDLE THE METER GENTLY AND CAREFULLY. Dropping it can damage the

electronic parts or the case.

4. KEEP THE METER CLEAN. Wipe the case occasionally with a damp cloth. DO

NOT use chemicals, cleaning solvents, or detergents.

5. USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE.

Remove old or weak batteries so they do not leak and damage the unit.

6. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the battery

should be removed to prevent damage to the unit.

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Model EX310 - Version 7.1 – 05/2006

BATTERY INSTALLATION and LOW BATTERY INDICATION

WARNING: To avoid electric shock, disconnect the test leads from any source of voltage

before removing the battery cover. Do not operate meter unless the battery is in place.

LOW BATTERY INDICATION

The 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

1. Disconnect the test leads from the meter.

2. Remove the protective rubber holster. See diagram.

3. Remove the Phillips head screw located on the lower back of the instrument.

4. Remove the fuse/battery compartment cover to access the battery. See diagram.

5. Replace the 9V battery observing polarity.

6. Secure the fuse/battery compartment cover using the Phillips head screw.

7. Place the protective rubber holster on the meter.

1. Removable Rubber Holster

2. Meter

3. Battery

4. Fuses

5. Compartment Cover

6. Rubber Holster

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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.

1. Disconnect the test leads from the meter.

2. Remove the protective rubber holster.

3. Remove the Phillips head screw located on the lower back of the instrument.

4. Remove the fuse/battery compartment cover to access the fuses.

5. Gently remove the fuse(s) and install new fuse(s) into the holder(s).

6. Always use fuses of the proper size and value (200mA/250V fast blow for the mA /

µA ranges, 10A/250V fast blow for the A range).

7. Secure the fuse/battery compartment cover.

8. 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.

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Model EX310 - Version 7.1 – 05/2006

Range Specifications

Function Range Resolution Accuracy

Non-contact AC Voltage detector

100 to 600V Resolution & accuracy do not apply since the meter does

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.

200mV 0.1mV

±(0.5% reading + 2 digits)

2000mV 1mV

20V 0.01V

200V 0.1V

±(1.0% reading + 2 digits)

DC Voltage

(V DC)

600V 1V

±(1.5% reading + 2 digits)

200V 0.1V

±(1.5% reading + 3 digits)

AC Voltage (VAC) 50/60Hz

600V 1V

±(2.0% reading + 4 digits

200mA 0.1mA

±(1.5% reading + 2 digits)

DC Current

(A DC)

10A 0.01A

±(2.5% reading + 5 digits)

200mA 0.1mA

±(1.8% reading + 5 digits)

AC Current

(A AC) 50/60Hz

10A 0.01A

±(3.0% reading + 7 digits)

200Ω 0.1Ω ±(1.2% reading + 4 digits)

2000Ω 1Ω

20kΩ 0.01kΩ

200kΩ 0.1kΩ

Resistance

2000kΩ 1kΩ

±(1.2% reading + 2 digits)

Notes:

Accuracy specifications consist of two elements:

• (% reading) – This is the accuracy of the measurement circuit.

• (+ digits) – This is the accuracy of the analog to digital converter.

Accuracy is stated at 65

F to 83oF (18oC to 28oC) and less than 75% RH.

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Model EX310 - Version 7.1 – 05/2006

General Specifications

Diode Test Bias voltage: 2.3VDC Continuity Check Audible signal will sound if the resistance is less than 100Ω Input Impedance 10MΩ (VDC & VAC) AC Bandwidth 50 / 60Hz Display 2000 count (0 to 1999) LCD Overrange indication “1___” is displayed Polarity Automatic (no indication for positive); Minus (-) sign for

negative

Measurement Rate 2 times per second, nominal Low Battery Indication “ ” is displayed if battery voltage drops below operating

voltage

Battery One (1) 9V battery Fuses mA range; 200mA/250V fast blow

A range; 10A/250V fast blow, ceramic

Operating Temperature 32ºF to 122ºF (0ºC to 50ºC) Storage Temperature -4

F to 140oF (-20oC to 60oC)

Operating Humidity Max 70% up to 87ºF (31ºC) decreasing linearly to 50% at

122ºF (50ºC)

Storage Humidity < 80% RH Operating Altitude 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 IEC610101 2nd Edition (2001) to CAT II 1000V & 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 I

Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level. Note – Examples include protected electronic circuits.

OVERVOLTAGE CATEGORY II

Equipment of OVERVOLTAGE CATEGORY II 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

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Model EX310 - Version 7.1 – 05/2006



Support line (781) 890-7440

Technical support: Extension 200; E-mail: support@extech.com

Repair & 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

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, 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.

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Extech Instruments EX310 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual