UEi Test Instruments DT15A User manual

DT15A/DT20A

Instruction Manual

INTRODUCTION

Forward

Congratulations on your purchase of this thermometer by UEi!

This instrument is a portable, battery operated temperature-

measuring device. It uses thermister probes to provide fast,

accurate measurements with excellent resolution.

Materials Supplied

This package contains:

• TheDT15AorDT20Atemperaturetester

• Animpactresistantrubberboot

• ATT55Athermistorprobe(twoprobesincludedwithDT20A)

• Installedbatteries

• Thisinstructionmanual

SAFETY

Practicing Safety

This instrument is designed for professionals who know the

hazards associated with their trade. While the opportunity to

injure yourself as a direct result of operating this instrument is

nearly non-existent, the equipment you are servicing, as well as

the environment you’re

working in, can be hazardous. These are a few common safety

practices for those working around temperature critical

environments:

• Followthemanufacturer’smaintenanceprocedureswhen

servicing equipment

• PlaceONLYthermistorprobesinthejacks

• Besuretheprobeyouareusingcanwithstandthetempera-

ture extreme it may be exposed to in your service task

• Properlymaintainyourthermometerandcalibrateitregularly

CONTROLS AND INDICATORS

Key:

1. PowerSwitch-Powersinstrumentonandoff

2. Min/Max–Displaysthecapturedminimumandmaximum

values for all parameters.

3. BackLightSwitch-Powersbacklightonandoff

4. HoldSwitch-Freezesscreendata

5. °F/°CModeSelectSwitch-Togglesdisplaydatafrom

 degreesCelsiustodegreesFahrenheit.

6. T1-T2Switch(DT20Aonly)-Togglesscreeninformation

 betweenT,T2,andT1-T2.

7. ThermistorPorts–1/8”minijackplugsforthethermistor

 probesused;T1ontheleftT2ontherightforDT20A

8. LCDDisplay–Displayscreenoffunctionand

data information

9. SecondDisplay(DT20Aonly)–DisplayofT2orT1-T2data

OPERATING INSTRUCTIONS

Functional Description

ThemeterwillmomentarilyflashallLCDsegmentsonthe

display when it is first turned on, emit four quick beeps then

it will go blank for approximately 3 seconds before starting

operation. The instrument will only provide information with

probes plugged in.

TheDT15Ahasasinglescreenofinformationtoviewthe

temperaturein°For°C,recordedminimumormaximum,or

held value.

TheDT20AhasasplitscreentoviewbothT1andT2,or

T1-T2andyourchoiceofeitherT1orT2.Thechoicesfor

formatarethesameaswiththeDT15A.Numerousviewing

combinations are available to ensure you get the information

you need.

• Min/Maxfunctionstartswhenthemeterispoweredon,

and continues to capture values while operating with

probes connected

• TemperaturereadingsareeasilytoggledbetweenFahren-

heit and Celsius

• ThebacklightilluminatestheLCDforviewinginlowlight

areas

• TheHOLDbuttonwillfreezethedisplaydataandsuspend

theMin/Maxfunction

• Thedisplaywillbegintoblinkwhenbatteryvoltageislow.

Note:Ifnoprobesarepluggedin,threedasheswillappearin

the temperature data screens. This will also be recorded as a

Maxuntilthepowerisswitchedoffthenbackon.

This instrument operates and updates silently.

Auto Power Off

Thisinstrumentwillshutoffautomaticallyinapproximately60

minutes.Forrecordingoroperatingoverlongerperiodsof

time you can defeat the auto power off function by holding

down the hold button while turning the unit on. The unit will

start with one solid beep to indicate that auto power off func-

tion is not activated.

Mode Options

Whentheinstrumentisinitiallyturnedon,thePrimaryscreen

displaysT1andtheSecondaryscreendisplaysT2(DT20A).

The following table lists the modes of operation that can be

invoked by pressing the buttons indicated. The table assumes

your instrument has been powered on with temperature

probe(s)installed:

— Continued on reverse —

DT15A/DT20A Controls

DT20Ashown.DT15AdoesnothavedualdisplayorT1-T2button.

DT15A/DT20AMAN9/01

Button Response/Display

On/Off Turnsinstrumenton(Defaultsetting)andoff.

Three beeps emitted at power up.

MIN/MAX PressonceandthedisplayindicatesMIN.

  Youarenowabletochangescalestodisplay

  minimumindegreesForC,andontheDT20Ayou

  areabletocyclethroughT1-T2options.

  PressasecondtimetodisplayMAX–Youhave

the same display

  Pressagaintoreturntorealtimereadings.

Back Light Pressmomentarilytoactivateorturnoffthe

backlight.

Hold Pressmomentarilytoholdallreadings.Thisalso

  stopstherecordingofMin/Maxvalues.

Hold down while turning unit on to disable auto

power off. Confirmed with one solid tone.

˚F / ˚C Pressmomentarilyandtheunittogglesbetween

  Fahrenheit(thedefault)andCelsiustemperatures.

The current mode is indicated on the right side of

  theLCD.

T1/T2 (DT20A Only) Pressmomentarilytodisplay

  T1-T2onthelowerdisplaywithT1onthe

upper display.

  PressagaintodisplayT1-T2onthelowerdisplay

  withT2ontheupperdisplay.

  PressingathirdtimewillreturnthedisplaytoT1

  ontheupperdisplayandT2onthelowerdisplay.

MAINTENANCE

Cleaning

Use a damp cloth and mild soap to clean the case of your ther-

mometer.Donotuseharshdetergentsorabrasivesasthese

may mar the finish or damage your unit’s case with an adverse

chemical reaction.

Donotallowmoisturetodirectlycontactthetemperatureprobe

jacks, or enter the instrument’s housing. Remove the instrument

from its boot to ensure moisture is not trapped during cleaning.

Replacing the battery

Replaceyour(3)AAAalkalinebatterieswhen:

• Thedisplaybeginstoblinkonandoff

• Theinstrumentwillnotpoweron

• Useoftheback-lightcausesthedisplaytoblink

Even if the batteries were recently replaced, check their volt-

age level if you get no response from your instrument. Remove

batteries from instruments that you do not plan to use for a

monthormore.Donotleavebatteriesininstrumentsthatmay

be exposed to temperature extremes.

Dispose of batteries in accordance with local land use regula-

tions.

To replace the batteries:

1. Removethetemperatureprobesfromthetopof

the instrument

2. Removetherubberboot,byslidingtheinstrument

out toward the top faceplate cut-out

3.Laytheinstrumentfacedownonaclean,flatsurface.

4. Remove the battery cover by sliding it straight down.

5.Removeandreplacethebatteries,observing

indicated polarity.

Calibration

To ensure your instrument is performing at its peak, send it to

the UEi factory or a qualified instrument calibration facility for

annual calibration.

TROUBLESHOOTING

This instrument contains no user serviceable parts beyond

those listed in this table. In the event your instrument is physi-

cally damaged or does not function properly after taking the

listed action, please return the instrument to UEi following the

warranty and service instructions.

SPECIFICATIONS

Replacement Parts

Batteries:ThreeStandardAAA(NEDA24A,IECLR03)

Alkalinerecommended

TemperatureProbes:ATT55Athermistorprobeimmersionstyle

Optional Accessories

Probes: ATT56AAirprobe

  ATT57ASurfaceprobe

  AC319SoftCarryingCase

Operating Conditions

32to122°F(0to50°C)at0to85%relativehumidity

(non-condensing)

WARRANTY AND SERVICE

DT15A/DT20A Warranty

Yourthermometeriswarrantedtobefreefromdefectsin

material and workmanship for a period of three years from the

date of

purchase. If, within this warranty period, your thermometer

should become inoperative from such defects, the instrument

will be

repaired or replaced at UEi’s option. This warranty does not

cover batteries, misuse, abuse, alteration, tampering, neglect,

or improper maintenance, or damage resulting from leaking

batteries.Proofofpurchaseisrequiredforwarrantyrepairs.

Service Information

Servicecoveredunderwarrantywillbeprovidedatnocharge.

Instrumentsoutofwarrantywillberepaired,(whenrepairable)

for a service charge. Return the unit postage paid and insured

to:

UEiServiceDepartment

8030SWNimbus•Beaverton,Oregon97008

To receive a free catalog containing our full line of test and

measurementproducts,call(503)644-8723.Visitourfull-feature

web site at ueitest.com.

Autopower

off defeat

Hold function suspends

captureofMIN/MAX

values

Allow5secondsafter

power-on for data to

show up on screen

Instrument turns

off during

recording

Probes

TimeDelay

Dashesappear

in data screen

InsertmissingProbes

Dashesappear

during review

of maximum

recorded value

Followprocedures

outlinedinOperating

Instructions

Hold function

activated

Check for intermittent or

momentarily removed

temperature probe

Replace low batteries

Battery

voltage

Instrument does

not turn on

If I See This

Malfunction

I Should

Check For

Then Take This Corrective

Action

Battery

Polarity

Ensure batteries are

installed as shown in battery

compartment

OpenProbe

Minimumor

Maximumvalue

not captured

Specificationsareforoperatingtemperaturesbetween64and77°F(18to25°C).

Specificationsvalidfor1yearaftercalibration.

Range Resolution Accuracy

-50to-20°F/°C

-19.9to199.9

°F/°C

200to571°F

200to300°C

1°

0.1°

±1%

±1.5°F/°C

GENERAL SPECIFICATIONS

H x W x D

Weight

Thermistor

5.5”x3”x1.25”

.44 lbs.

100k

UEi Test Instruments DT15A, DT20A User manual

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