Extech Instruments TM20 User manual

USERGUIDE

PortableThermometers

ModelsTM20,TM25,andTM26

TM20Thermometer

StandardProbe

TM25Thermometer

PenetrationProbe

TM26Thermometer

PenetrationProbe

NSFCertified

SoundReflector

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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Introduction

ThankyouforselectingtheExtechPortableThermometer.TheTMseriesthermometersareideal

forhomeuse.Measurethetemperatureofair,liquid,paste,orsemi‐solidmaterials.

TheTM20usesastandardtemperatureprobewhiletheTM25andTM26areequippedwitha

penetrationprobeforinsertionintomaterialsundertest.TheTM26functionsthesameasthe

TM25buttheTM26includesasoundreflectorforamplifyingitsbeeperandisNSFcertified,

meetingtherequirementsforuseinthefoodserviceindustry.

Thesedevicesareshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof

reliableservice.

Specifications

Display Multi‐functionLCD

MeasurementrangeTM20:‐40to70oC(‐40to158oF)

TM25/TM26:‐40to200oC(‐40to392oF)

Resolution 0.1oC/oF

Accuracy ±0.5oC:0oto24oC

±1.0oC:‐20oto‐1oCand25oto49oC

±2.0oC:‐40oto‐21oCand50oto200oC

±0.9oF:32oto75oF

±1.8oF:‐4oto31oFand76oto120oF

±3.6oF:‐40oto‐5oFand121oto392oF

ProtectionsafetyratingIP65ratingonmeterandsensors

LowbatteryindicationBatterysymbolappearsontheLCD

Powersupply CR20323Vbuttonbattery

MeterDimensions 86(L)x57(H)x30(D)mm[3.4(L)x2.2(H)x1.2(D)"]

Cablelength TM20cable:2.9m(9.6’)

TM25/TM26cable:1.5m(5’)

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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

Doubleinsulation

GeneralSafety

oPleasereadallsafetyandinstructionalinformationbeforeusingtheseproducts.

oTheseproductsareintendedforhomeuseonlyonair,liquid,pastes,andsemi‐solid

materials.

oUnauthorizedrepairs,modifications,orotherchangestotheproductsarenotsupported.

oThisproductisnotintendedforuseinmedicalpractice.

Caution!RiskofInjury!

oKeeptheseproducts,theirprobes,andbatteriesoutofthereachofchildrenandpets

oUseextremecautionwhenhandlingtheprobes

oBatteriesmustnotbeplacedinfire,shortcircuited,takenapart,ordischarged.Riskof

explosion!

oBatteriescanbefatalifswallowed.Contactmedicalemergencypersonnelifbatteriesare

swallowed.

oBatteriescontainharmfulacids.Lowbatteriesshouldbechangedassoonaspossibleto

preventdamagecausedbyleakingbatteries.

ProductSafety!

oDonotplacetheseproductsnearextremetemperatures,vibration,orshock

oOnlytheprobesareheatresistantto392oF(200oC)fortheTM25/TM26probeandto158oF

(70oC)fortheTM20probe,notthemetersthemselves

oNeverholdaprobedirectlyinoroverfire

oDonotimmersethemetersinanyliquid

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12 3

Description

MeterDescription

1. Meter

2. LCDdisplay

3. PowerON/OFFbutton

4. MAX/MINbutton

5. ALARM/SETbutton

6. Temperatureunits/uparrowbutton

7. Meterstand/base

8. Sensorcabling

9. Sensortips

10. Probemountingbracket

Note:Wallmountaccesshole,magnet,andsoundreflector(TM26only)onrearofinstrument,

notpictured.

DisplaySymbols

1. Batterypowerstatus

2. Measurementreading

3. Alarmarmedsymbol

4. TemperatureDegreessymbol

5. HighAlarmsymbol

6. LowAlarmsymbol

7. CorFunitofmeasure

8. Data(Display)Hold

9. MAXreadingdisplay

10. MINreadingdisplay

11. ERROR(Batteryvoltagetoolowtodisplayaccuratereadings)

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Operation

DisplayProtectiveFoil

Themeter’sdisplayisshippedwithaprotectivefoilcovering.Pleaseremovecarefullybefore

use.

Poweringthemeter

Openthebatterycompartmentbylooseningthetwoscrewslocatedonthebackofthemeter

(oneithersideofthemagnet).InsertanewCR20323Vlithiumbuttonbatteryandclosethe

cover.Ifabatteryisalreadyinstalled,removetheinsulationstripsothatthebatterycanmake

propercircuitcontact.

Theinstrumentisnowreadyforuse.PresstheON/OFFkeyoncetopowerthemeter.The

meter’sprevioussettingswillbepreserved.

AllEUusersarelegallyboundbythebatteryordinancetoreturnallusedbatteriestocollection

pointsinyourcommunityorwhereverbatteries/accumulatorsaresold!Disposalinthehousehold

trashisprohibited!

SelectingoC/oFunitsofmeasure

PresstheoC/oFkeytoselectthedesiredtemperatureunitofmeasure.

MAX‐MINandHOLDFunction

Tofreeze(hold)thedisplayedreading,presstheMAX/MINkey.Thecurrentreadingwillbe

heldonthedisplayandtheHOLDdisplayiconwillbevisible.

PressMAX/MINagaintoviewtheMaximumreadingcapturedsincethelastreset;theMAX

indicatorwillbevisiblealongwiththeMAXreading.

PressMAX‐MINagaintoviewtheMinimum(MIN)temperaturereading;theMINiconwillbe

visiblealongwiththelowestreadingcapturedsincethelastreset.

ToresettheMAXandMINvaluespressandholdtheMAX‐MINbuttonfor3secondswhile

theMAXorMINiconisvisible.

ToreturntonormaloperationpresstheMAX/MINkeyagain;theHOLD‐MIN‐MAXindicators

shouldnowbeoff.

SoundReflector(TM26only)

TheTM26includesasoundreflectorontherearoftheunit.Thisdeviceamplifiestheaudible

beepersoastobeheardfromgreaterdistances.

NSFCertified(TM26only)

TheTM26isNSFCertified,meetingtherequirementsforuseinthefoodserviceindustry.

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TemperatureAlarms

Sethigh/lowalarmlimitsasdescribedbelow.Themeterwillthenaudiblyandvisuallyalertthe

userifeitherlimitisexceeded:

1. PresstheALARM/SETbuttononcefromthenormaloperatingmode;theupperlimitvalue

anditssymbol(uparrow)willflash.

2. Setthetemperaturelimitbypressingthe▲button(pressandholdforfastscrolling).

3. NowusetheMAX/MINbuttontoactivate/deactivatethealarm(alarmsymbolwillappear

intheupperrighthandcorneroftheLCDwhenactivated).

4. VerifythesettingbypressingALARM/SET.

5. Performthesamestepsforthelowalarmlimit.

Aftersettingthealarms,theupperandlowerlimitsymbols(▲▼)willbedisplayedontheLCD

indicatingthatanupperandaloweralertvaluehasbeenset.Ifthemeasuredtemperature

exceedseitherlimit,thealarmbeeperwillsoundfor1minute.Thealarmbeepericonandthe

correspondingarrowwillflash.Pressinganybuttonwillswitchoffthealarm.

Whenthetemperaturereturnstothedesiredrangetheaudiblealarmwillstopsounding.The

arrowwillremainflashinghowevertoshowthatthetemperaturewashigherorlowerthanaset

valueatleastonceinthepast.Pressthe▲buttontoswitchOFFtheflashingarrow.

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

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

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