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User’s Guide

HH502

Digital Thermometer

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It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is

constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every

appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA accepts

no liability for any errors it contains, and reserves the right to alter specifications without notice.

WARNING: These products are not designed for use in, and should not be used for, human applications.

Benelux:

Managed by the United Kingdom Office

Toll-Free: 0800 099 3344 TEL: +31 20 347 21 21

FAX: +31 20 643 46 43 e-mail: [email protected]

Czech Republic:

Frystatska 184, 733 01 Karviná, Czech Republic

Toll-Free: 0800-1-66342 TEL: +420-59-6311899

FAX: +420-59-6311114 e-mail: [email protected]

France:

Managed by the United Kingdom Office

Toll-Free: 0800 466 342 TEL: +33 (0) 161 37 29 00

FAX: +33 (0) 130 57 54 27 e-mail: sale[email protected]

Servicing Europe:

U.S.A. and Canada:

Sales Service: 1-800-826-6342/1-800-TC-OMEGA®

Customer Service: 1-800-622-2378/1-800-622-BEST®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN®

U.S.A.: ISO 9001 Certified

OMEGA Engineering, Inc.

One Omega Drive, P.O. Box 4047

Stamford, CT 06907-0047 USA

Toll-Free: 1-800-826-6342 TEL: (203) 359-1660

FAX: (203) 359-7700 e-mail: [email protected]

Servicing North America:

For immediate technical or application assistance:

Mexico:

En Español: 001 (203) 359-7803

FAX: (001) 203-359-7807

[email protected]

e-mail: [email protected]

Germany/Austria:

Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

Toll-Free: 0 800 6397678 TEL: +49 (0) 7059 9398-0

FAX: +49 (0) 7056 9398-29 e-mail: [email protected]

United Kingdom:

ISO 9001 Certified

OMEGA Engineering Ltd.

One Omega Drive, River Bend Technology Centre

Northbank , Irlam, Manchester M44 5BD England

Toll-Free: 0800-488-488 TEL: +44 (0)161 777-6611

FAX: +44 (0)161 777-6622

e-mail: [email protected]

Canada:

976 Bergar

Laval (Quebec), Canada H7L 5A1

Toll-Free: 1-800-826-6342 TEL: (514) 856-6928

FAX: (514) 856-6886 e-mail: [email protected]

The symbol on the instrument indicates that the operator must refer to an

explanation in this manual.

WARNING

To avoid electrical shock, do not use this instrument when working

voltages at the measurement surface over 24V AC or DC.

WARNING

To avoid damage or burns, do not make temperature

measurement in microwave ovens.

CAUTION

Repeated sharp flexing can break the thermocouple leads. To prolong

lead life, avoid sharp bends in the leads, especially near the connector.

INTRODUCTION

This instrument is a 4½ digit, compact-sized portable digital thermometer

designed to use external K-type and J-type thermocouples as temperature

sensor.TemperatureindicationfollowsReferenceTemperature/VoltageTables

(N.I.S.T. Monograph 175 Revised to ITS-90) for K-type and J-type thermo-

couples. Two K-type thermocouple are supplied with the thermometer.

SAFETY INFORMATION

Itisrecommendedthatyoureadthesafetyandoperationinstructionsbefore

using the thermometer.

SPECIFICATIONS

ELECTRICAL

Temperature Scale: Celsius or Fahrenheit user-selectable.

Measurement Range:

J-TYPE -200°C to 1050°C, (-328°F to 1922°F)

K-TYPE -200°C to 1370°C, (-328°F to 2498°F)

Resolution: 0.1°C or 0.2°F.

Accuracy:Accuracyisspecifiedforoperatingtemperaturesovertherangeof

18°C to 28°C (64°F to 82°F), for 1 year, not including thermocouple error.

±(0.05% rdg + 0.3°C) -50°C to 1370°C

±(0.05% rdg + 0.7°C) -50°C to -200°C

±(0.05% rdg + 0.6°F) -58°F to 2498°F

±(0.05% rdg + 1.4°F) -58°F to -328°F

TemperatureCoefficient:0.1timestheapplicableaccuracyspecificationper

°C from 0°C to 18°C and 28°C to 50°C (32°F to 64°F and 82°F to 122°F).

Input Protection: 24V dc or 24V ac rms maximum input voltage on any

combination of input pins.

Maximum Differential Common Mode Voltage (Maximum Voltage be-

tween T1 and T2 during measurement): 1volt.

Reading Rate: one time per second.

Input Connector: Accepts SMP male miniature thermocouple connectors.

ENVIRONMENTAL

Ambient Operating Ranges: 0°C to 50°C (32°F to 122°F) <80% R.H.

Storage Temperature: -20°C to 60°C (-4°F to 140°F) <70% R.H.

GENERAL

Display:4½digitliquidcrystaldisplay(LCD)withmaximumreadingof19999.

Overload: "----.-" is display.

Battery: Standard 9V battery.

Battery Life: 100 hours typical.

Auto power off: The meter key switch inactive for more than 30 minutes,

press power key to resume operation.

Dimensions: 192mm(H) x 91mm(W) x 52.5mm(D).

Weight: 365g.

OPERATING INSTRUCTIONS

Power Switch

The key turns the thermometer on or off. In the data SET mode, can not

power off, must leave data SET mode then power off.

°C/°F Selecting the Temperature Scale

Readings are dual displayed in either degrees Celsius(°C) or degrees

Fahrenheit(°F). When the thermometer is turned on, it is set to the

temperature scale that was in use when the thermometer was last turned

off. To change the temperature scale, press the °C/°F key.

HOLD Mode (only Main display)

Pressing the HOLD key to enter the Data Hold mode, the "HOLD" annun-

ciator is displayed. When HOLD mode is selected, the thermometer held

the present readings and stops all further measurements.

PressingtheHOLDkeyagaintocancelHOLDmodecausing thermometer

to resume taking measurements.

In the MIN/MAX recording mode, press HOLD key to stop the recording.

Press HOLD key again to resume recording. (Previously recorded reading

are not erased).

T1 /T2/T1-T2 Main display Input Selection

The input selection indicates which input is selected for main display; T1

thermocouple,T2thermocoupleorthedifferencebetweenthetwothermo-

couples (T1-T2), when the thermometer is turned on, it is set to T1, When

main display input selected T1, then T1 input can select alternate of

thermocouple by pressing K/J key switch.

K/J T1 Input Thermocouple Type Select (Main display)

The K/J key switch the T1 input selects the K-type or J-type thermocouple

as input, when main display input selected T1.

When the thermometer is turned on, it is set to the type selected that was

in use when the thermometer was last turned off.

MIN MAX with Time record Mode (only Main display)

Press MIN MAX key to enter the MIN MAX Recording mode, (displays the

Maximum reading with time, Minimum reading with time and Average

reading stored in record mode). In the this mode the automatic power-off

featureis disabledand key,°C/°Fkey,RELkey,SETkey,Hi/LoLIMITS

key and main display T1 T2 T1-T2 key, K/J key are disabled.

The beeper emits a tone when a new minimum or maximum value is

recorded.

Push MIN MAX key to cycle through the MAX, MIN and AVG readings.

If an overload is recorded, the averaging function is stopped and average

value display"----.-".

In the this mode, press HOLD key to stop the recording of readings, all

values are frozen, press again to restart recording.

TopreventaccidentallossofMIN,MAXandAVGdata,inthismodecanonly

becancelledbypressingandholddowntheMINMAXkeyfor2secondsto

exit and erased recorded readings.

WARNING

MIN,MAXandAVGreadingscanberecordedforaperiodofupto20hours

maximum. If this 20 hours period is exceeded the unit readings will not be

accurate.

REL Relative mode (only Main display)

Pressing REL key to enter the Relative mode, zero the display, and store

the displayed Reading as a reference value and annunciator REL is

displayed. Press REL key again to exit the relative mode.

The relative value can also be entered by the user. (See "SET mode" later

in this manual.)

WhenthedesiredRelativevaluehasbeenentered,pressRELkeytoenter

the Relative mode, press SET key use set Relative value as a reference

value. Press REL key again to exit the relative mode.

In the Relative mode, the value (can not >±3000.0 counts) shown on the

LCDisalwaysthedifferencebetweenthestoredreferenceandthepresent

reading.

Sec. Minu. Selecting the Time scale

Reading the third displayed (Time) in either second or minute. When the

thermometerturnedon,itissettosecond.TochangetheTimescale,press

sec. Minu. key.

Maximum Time reading is 100 hours. If 100 hours is exceeded, reset Time

to zero and restart.

SET mode (Relative value set, Time set and Hi/Lo Limits value set)

1. Press SET key to enter Relative valuse SET mode (Press ENTER key can

escape relative valuse set mode), REL set mode. = = = =.= is displayed in

main display.

Relativevalueisenteredviaoverlaynumbers,thenpressoverlayENTERkey,

stored the relative value, enter Time set mode.

2. Time set mode, (Press ENTER key can escape Time set mode)

=.= ==:==isdisplayedinsecondandthirddisplay.Time(hours,minutes,

seconds)valueisenteredviaoverlaynumbers,thenpressoverlayENTER

key. Time start from set time value, enter Hi/Lo Limits value set mode.

3. Hi Limit value set mode, is displayed (Press ENTER key can escape Hi

Limit value set mode), = = = =.= is displayed in main display, Hi Limit value

is entered via overlay numbers, then press overlay ENTER key, stored the

HiLimitvalue,enterLoLimitvaluesetmode(Press ENTERkeycanescape

Lo Limit value set mode). = = = =.= is displayed in main display, Lo Limit

value is entered via overlay numbers, then press overlay ENTER key,

stored the Lo Limit value and exit SET mode.

4.Whenthethermometeristurnedon.TheRelativesetvalueandHi/LoLimits

setvaluethat was in usewhenthermometerwas last turned offsetvalues.

T1/T2/T1-T2 second display Input Selection

Theinput selectionindicateswhichinputisselectedforseconddisplay;T1

thermocouple,T2thermocoupleorthedifferencebetweenthetwothermo-

couples (T1-T2), when the thermometer is turn on, it is set to T2 input can

select alternate of thermocouple by second display K/J key switch.

K/J T2 Input thermocouple type select (second display)

The K/J key switch the T2 input selects the K-type or J-type thermocouple

as input, when second display input selected T2.

When the thermometer is turned on, it is set to the type selected that was

in use when the thermometer was last turned off.

Hi/Lo Limits mode (only Main display)

Press Hi/Lo Limits key to enter the Hi/Lo Limits comparative mode, is

displayed,wheninputtemperaturevalueexceedHiorLoLimitsvalue.The

beeper emits a continuity pulse tone. Press Hi/Lo Limits key again to exit

the Hi/Lo Limits mode.

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