Extech Instruments MiniTec Series Bedienungsanleitung

User’s Manual

MiniTecTM Series MultiMeter

Model MN24

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2 MN24-en-US_V2.2 07/15

Introduction

Congratulations on your purchase of Extech’s MN24 Multimeter. This meter

measures AC/DC Voltage, DC Current, Resistance, Battery Voltage, Diode

Voltage and Continuity. This professional meter is shipped fully tested and

calibrated and, with proper care, will provide years of safe reliable service.

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user

must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use,

hazardous voltages may be present

Safety Precautions

1. Improper use of this meter can cause damage, shock, injury or death. Read

and understand this user manual before operating the meter.

2. Make sure any covers or battery doors are properly closed and secured.

3. Always remove the test leads before replacing the battery or fuses.

4. Inspect the condition of the test leads and the meter itself for any damage

before operating the meter. Repair any damage before use.

5. Do not exceed the maximum rated input limits.

6. Use great care when making measurements if the voltages are greater than

25VAC rms or 35VDC. These voltages are considered a shock hazard.

7. Always discharge capacitors and remove power from the device under test

before performing Diode, Resistance or Continuity tests.

8. Remove the battery from the meter if the meter is to be stored for long

periods.

9. Voltage checks on electrical outlets can be difficult and misleading because

of the uncertainty of connection to the electrical contacts. Other means

should be used to ensure that the terminals are not "live".

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3 MN24-en-US_V2.2 07/15

Description

1. LCD Display

2. Function switch

3. COM jack

4. 10A jack

5. Positive jack

Note: Tilt stand, fuse, and battery compartment are located on the rear of the unit

Symbols

•))) Continuity

Diode test

micro (amps)

m milli ( volts, amps)

k kilo (ohms)

 ohms

VDC volts direct current

VAC volts alternating current

ADC amps direct current

BAT Low battery

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Operating Instructions

AC or DC Voltage Measurements

1. Insert the black test lead banana plug into the negative

COM jack and the red test lead banana plug into the

positive Vjack.

2. Turn the rotary switch to the VDC or VAC range needed.

3. Touch the test probes to the circuit under test and read the

voltage on the display.

DC Current Measurements

CAUTION: Do not make current measurements on the 10A scale for longer

than 30 seconds. Exceeding 30 seconds may cause damage to the meter

and/or the test leads. Allow 15 minute cool-down after high current

measurements

1. Insert the black test lead banana plug into the negative

COM jack and the red test lead banana plug into the;

a. Positive mA jack for currents to 200mA

b. Positive 10A jack for currents to 10A

2. Turn the rotary switch to the ADC range needed.

3. Touch the test probes in series with the circuit under

test and read the current on the display.

Resistance Measurements

1. Insert the black test lead banana plug into the negative COM jack and the

red test lead banana plug into the positive jack.

2. Turn the rotary switch to the range needed.

3. Touch the test probes to the circuit or device under test

and read the resistance on the display.

Continuity Measurements

1. Insert the black test lead banana plug into the negative

COM jack and the red test lead banana plug into the

positive jack.

2. Turn the rotary switch to the /•))) position.

3. Touch the test probes to the circuit or device under test. If the resistance is

less than approximately 30the buzzer will sound. Read the resistance on

the display.

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5 MN24-en-US_V2.2 07/15

Diode Measurements

1. Insert the black test lead banana plug into the negative COM jack and the

red test lead banana plug into the positive diode jack.

2. Turn the rotary switch to the /•))) position.

3. Touch the test probes to the diode under test. Forward voltage will indicate

400 to 700mV. Reverse voltage will indicate “I”. Shorted devices will

indicate near 0mV. Shorted devices will indicate near 0mV and an open

device will indicate “I” in both polarities.

Battery Test

1. Insert the black test lead banana plug into the negative COM jack and the

red test lead banana plug into the positive Vjack.

2. Select the 1.5V or 9V BAT position using the function select switch.

3. Connect the red test lead to the positive side of the 1.5V or 9V battery and

the black test lead to the negative side of the 1.5V or 9V battery.

4. Read the voltage in the display.

Good Weak Bad

9V battery: > 8.2V 7.2 to 8.2V < 7.2V

1.5V battery: > 1.35V 1.22 to 1.35V < 1.22V

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6 MN24-en-US_V2.2 07/15

Maintenance

WARNING: To avoid electrical shock, disconnect the test leads from any

source of voltage before removing the rear cover.

WARNING: To avoid electrical shock, do not operate this meter until the rear

cover is in place and fastened securely.

This Multimeter is designed to provide years of dependable service if the following

care instructions are observed.

1. Keep the meter dry.

2. Use and store the meter in mild ambient conditions. Temperature

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

plastic parts.

3. Handle the meter gently. 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 batteries should

be removed to prevent damage to the unit.

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7 MN24-en-US_V2.2 07/15

Battery Replacement

WARNING: To avoid electrical shock, disconnect the test leads from any

source of voltage before removing the rear cover.

1. Disconnect the test leads from the meter.

2. Remove the rubber holster (if in place)

3. Open the battery door by removing the screw with a

Phillips head screwdriver

4. Insert the new battery into the battery holder, ensuring

correct polarity

5. Replace the battery door and secure with the screw

Fuse Replacement

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

source of voltage before removing rear cover.

1. Disconnect the test leads from any circuit being measured.

2. Remove the rubber holster (if in place)

3. Open the fuse cover by removing the screw with a Phillips head

screwdriver.

4. Remove the old fuse and Install the new fuse by gently pushing it into the

holder.

5. Always use a fuse of the proper size and value (0.2A/250V fast blow, or

10A/250V fast blow).

6. Replace the fuse cover and secure with the screw

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8 MN24-en-US_V2.2 07/15

Specifications

Function Range Resolution Accuracy

DC Voltage

(V DC)

200mV 0.1mV (0.5% reading + 2 digits)

2000mV 1mV

20V 0.01V

200V 0.1V

600V 1V

AC Voltage

(V AC)

200V 0.1V (1.2% reading + 10 digits

(50/60Hz)

600V 1V

DC Current

(A DC)

2000A 1A (1.0% reading + 2 digits)

20mA 10A

200mA 100A (1.2% reading + 2 digits)

10A 10mA (2.0% reading + 2 digits)

Resistance 2000.1(0.8% reading + 2 digits)

20001

20k0.01k

200k0.1k

2000k1k(1.0% reading + 2 digits)

Battery Test 9V 10mV (1.0% reading + 2 digits)

1.5V 10mV

Input Limits

Function Maximum Input

VAC 600VDC/VAC

VDC 600VDC, 600VAC, 200Vrms on 200mV range

Ohms, Continuity 220Vrms for 15sec max

mA DC 200mA, 250V fast acting fuse

10A DC 10A, 250V fast acting fuse

NOTE: Accuracy is stated at 65oF to 83oF (18oC to 28oC) and less than 75% RH.

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9 MN24-en-US_V2.2 07/15

Diode Test Test current of 1mA maximum, open circuit voltage 2.8V DC typical

Continuity Check Audible signal will sound if the resistance is less than approx 30

Battery Test current 9V (6mA); 1.5V (100mA)

Input Impedance >1M

ACV Bandwidth 45Hz to 450Hz

DCA voltage drop 200mV

Display 3 ½ digit, 2000 count LCD, 0.5” digits

Over range indication “1” is displayed

Polarity Automatic (no indication for positive polarity); Minus (-) sign for negative

polarity.

Measurement Rate 2 times per second, nominal

Low Battery Indication “BAT” is displayed if battery voltage drops below operating voltage

Battery one 9 volt (NEDA 1604) battery

Fuses mA, A ranges; 0.2A/250V fast blow

A range; 10A/250V fast blow

Operating Temperature 32oF to 122oF (0oC to 50oC)

Storage Temperature -4oF to 140oF (-20oC to 60oC)

Relative Humidity <70% operating, <80% storage

Operating Altitude 7000ft. (2000) meters maximum.

Weight 9.17 oz. (260g).

Size 4.78” x 2.38” x 1.57” (121.5mm x 60.6mm x 40mm)

Approvals UL, CE

Safety For indoor use and in accordance with Overvoltage Category II 600V,

Pollution Degree 2. Category II includes local level, appliance, portable

equipment, etc., with transient overvoltages less than Overvoltage

Category III.

UL Listed The UL mark does not indicate that this product has been evaluated for

the accuracy of its readings.

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10 MN24-en-US_V2.2 07/15

Warranty

FLIRSystems,Inc.warrantsthisExtechInstrumentsbranddevicetobefreeofdefectsinpartsandworkmanshipforoneyear

fromdateofshipment(asixmonthlimitedwarrantyappliesto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forauthorization.Visit

thewebsitewww.extech.comforcontactinformation.AReturnAuthorization(RA)numbermustbeissuedbeforeanyproductis

returned.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.FLIRSystems,Inc.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.FLIR’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,Repair,andCustomerCareServices

FLIRSystems,Inc.offersrepairandcalibrationservicesfortheExtechInstrumentsproductswe

sell.NISTcertificationformostproductsisalsoprovided.CalltheCustomerServiceDepartmentfor

informationoncalibrationservicesavailableforthisproduct.Annualcalibrationsshouldbe

performedtoverifymeterperformanceandaccuracy.Technicalsupportandgeneralcustomer

serviceisalsoprovided,refertothecontactinformationprovidedbelow.

Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

www.extech.com

SupportLines:U.S.(877)439‐8324;International:+1(603)324‐7800

TechnicalSupport:Option3;E‐mail:[email protected]

Repair&Returns:Option4;E‐mail:[email protected]

Productspecificationsaresubjecttochangewithoutnotice

Pleasevisitourwebsiteforthemostup‐to‐dateinformation

www.extech.com

FLIRCommercialSystems,Inc.,9TownsendWest,Nashua,NH03063USA

ISO9001Certified

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