Omega Speaker Systems HH-21A User's Manual
Contents
1. An OMEGA Technologies Company http www omega com e mail info omega com HH 21A HH 22A and HH 23A Handheld Microprocessor Digital Thermometers omega com lt OMEGAnet On Line Service Internet e mail http www omega com info omega com Servicing North America USA One Omega Drive Box 4047 ISO 9001 Certified Stamford CT 06907 0047 Tel 203 359 1660 FAX 203 359 7700 e mail info omega com Canada 976 Bergar Laval Quebec H7L 5A1 Tel 514 856 6928 FAX 514 856 6886 e mail canada omega com For immediate technical or application assistance USA 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 TELEX 996404 EASYLINK 62968934 CABLE OMEGA Mexico and Latin America Tel 95 800 TC OMEGA FAX 95 203 359 7807 En Espa ol 203 359 1660 ext 2203 e mail espanol Bomega com Servicing Europe Benelux Postbus 8034 1180 LA Amstelveen The Netherlands Tel 31 20 6418405 FAX 31 20 6434643 Toll Free in Benelux 06 0993344 e mail nl omega com Czech Republic Ostravska 767 733 01 Karvina Tel 42 69 6311899 FAX 42 69 6311114 e mail czech omega com France 9 rue Denis Papin 78190 Trappes Tel 33 130 621 400 FAX 33 130 699 120 Toll Free in France 0800 4 06342 e mail france omega com Germany Austria Daimlerstrasse 262. MIN MAX data is erased when the thermometer is turned off Record configurations are not saved during power off STOP CLR function cannot be performed while the readout is in the SCAN mode Select T1 T2 and or T1 T2 modes before attempting to stop recording or clear data The STOP CLR key must be pressed twice to clear recorded data and will only clear data in the TC mode that is active when the key is pressed SERVICE INFORMATION WARNING All service information is intended for qualified electronic maintenance personnel only 1 CALIBRATION PROCEDURE Test Equipment Required 1 2 Thermocouple calibrator Omega CL521 or equivalent Calibration cable for each thermocouple type handled by unit under test U U T Type K Type J Type T Ambient Conditions Units should be calibrated at an ambient temperature of 23 C 1 C with rel ative humidity less than 8096 Avoid air currents and heat sources that can disturb the thermal equilibrium of the U U T Procedure 1 2 3 Turn OFF U U T Remove rear cover Refer to Disassembly Instructions Install shorting plug on circuit board At the J1 Cal location Do not remove any shorting plugs from other J1 locations Refer to Mechanical Parts Diagram for location P N CS 791 4 Replace rear cover Reinstall battery Turn on U U T 5 Connect input of U U T to the thermocouple calibrator with a type K 10 18 cable Use input T1 on Models H
3. FEATURES Temperature trend indication rising falling or stable Full range resolution of 0 1 degree Work with thermocouple types K J and T Keypad selectable F or C Two probe inputs for two point temperature measurements Calculates and displays temperature difference between the two probe inputs Maximum and minimum temperature storage Dust proof splash proof drop proof construction Built in tilt stand hanger for bench use or hands free field measurements User friendly function programming Performs self diagnostic test and displays error readout Retains function settings even when turned off Low battery and open sensor indication Input data scan and display hold modes MANUAL ADDENDA Improvements or changes to this manual will be explained on an addendum included with the instrument All change information should be incorporated immediately into the appropriate places in the manual UNPACKING AND INSPECTION Each instrument is inspected both mechanically and electrically before ship ment Upon receiving your instrument unpack all items from the shipping container and check for any obvious damage that may have occurred during transit Report any damage to the shipping agent Retain and use the origi nal packing materials if reshipment is necessary SAFETY INFORMATION SAFETY SYMBOLS AND TERMS The symbol on the instrument denotes that the user should refer to the operating instructions The WARNING use
4. C ENVIRONMENTAL LIMITS FOR OPERATING 0 C to 50 C less than 80 relative humidity R H up to 35 C reduce R H limit by 3 C from 35 C to 50 C ENVIRONMENTAL LIMITS FOR STORAGE 35 C to 60 C less than 90 relative humidity R H up to 35 C reduce R H limit by 3 C from 35 C to 60 C INPUT CURRENT 50 nA typical READING RATE T1 T2 T1 T2 1 reading second typical all parameters 2 MAXIMUM COMMON MODE VOLTAGE 42V peak to earth POWER 9 volt transistor battery NEDA 1604 BATTERY LIFE CONTINUOUS 50 hrs typical carbon zinc 100 hrs typical alkaline 200 hrs typical lithium 15 hrs typical Ni Cd rechargeable BATTERY INDICATOR Display indicates BAT when less than 10 of life remains DISPLAY 5 digit LCD 0 4 height Polarity indication and decimal point Annunciators Readout Parameter T1 T2 T1 T2 SCAN Record Parameter MIN or MAX when viewing recorded data Readout Scale F C TC Type K J T Hold when activated Reading Trend up arrow for increasing readings down arrow for decreasing readings Both arrows on for stable reading Record MIN MAX readings for T1 T2 and or T1 T2 Flashing annunciator indi cates data being collected Steady annunciator indicates data available but not being up dated KEYPAD 9 momentary switches with tactile feedback select Power ON OFF Readout Ti T2 T1 T2 or SCAN TC type K J T Readout scale F C Resolution 0 1
5. D 75392 Deckenpfronn Germany Tel 49 07056 3017 FAX 49 07056 8540 Toll Free in Germany 0130 11 21 66 e mail germany omega com United Kingdom 25 Swannington Road P O Box 7 Omega Drive ISO 9002 Certified Broughton Astley Leicestershire Irlam Manchester LE9 6TU England M44 5EX England Tel 44 1455 285520 Tel 44 161 777 6611 FAX 44 1455 283912 FAX 44 161 777 6622 Toll Free in England 0800 488 488 e mail uk omega com It is the policy of OMEGA 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 Engineering Inc 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 patient connected applications TABLE OF CONTENTS General Information 2 Specificatioris c se re URL nce Ba Ener 2 Difference Specifications 4 ESE ao 5 Manual 5 Unpacking and Inspection 5 Safety 6 Safety Pre
6. Flowmeters amp Flow Computers Air Velocity Indicators 14 Turbine Paddlewheel Systems Totalizers amp Batch Controllers pH CONDUCTIVITY 4 pH Electrodes Testers Accessories i Benchtop Laboratory Meters Controllers Calibrators Simulators amp Pumps Industrial pH amp Conductivity Equipment DATA ACQUISITION Data Acquisition Engineering Software E Communications Based Acquisition Systems 4 Plug in Cards for Apple IBM amp Compatibles Y Datalogging Systems Recorders Printers amp Plotters HEATERS Heating Cable Cartridge Strip Heaters 4 Immersion amp Band Heaters Flexible Heaters E Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL 4 Metering Control Instrumentation EF Refractometers KH Pumps amp Tubing EY Air Soil amp Water Monitors Industrial Water amp Wastewater Treatment pH Conductivity amp Dissolved Oxygen Instruments M0739 12 07
7. SCREW 4 40x5 16PPHBLK BATTERY COVER E dE INCLUDED W BOTTOM COVER BATTERY FOAM 9 30509 3 SELF THREADING SCREWS 2 4 8x5 8PPHST FEET 4 TC CONNCECTORS 2 FE 13 STANDOFF ST 306 BATTERY CLIPS 865 306 1 SHORTING PLUG STRIP CONNECTOR 5 791 5 810 GASKET LCD SUPPORT 30172 130A 307 1 PAD WINDOW 30382 30195 LCD DD 203 TOP COVER MODEL HH 21 819 305 HH 21 820 305 HH 23 820 305 OVERLAY NOT SHOWN MODEL HH 21 HH21A 320 HH 22 22 320 HH 23 23 320 MEMBRANE KEYPAD SHOWN MODEL HH 21A 819 322 HH 21A 821 322 D HH 21A 821 322 D 21 22 23 24 WARRANTY DISCLAIMER 2 OMEGA ENGINEERING INC warrants this unit to be free of defects in materials and workmanship for a period of 37 months from date of purchase OMEGA Warranty adds an additional one 1 month grace period to the normal three 3 year product warranty to cover handling and shipping time This ensures that OMEGA s customers receive maximum coverage on each product the unit should malfunction it must be returned to the factory for evaluation OMEGA s Customer Service Department will issue an Authorized Return AR number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including
8. T1 T2 or T1 T2 then press REC When more than one measurement mode is to be recorded select the desired mode and then activate the record function When is activated a corresponding annunciator s will turn on and start flashing adjacent to the mode annunciator s T1 T2 T1 T2 The flashing REC annunciator means that minimum and maximum data is being recorded The instrument has 3 separate acquisition files which allow simultaneous recording of all three modes NOTE REC cannot be started while the readout is in the SCAN mode However after recording is initiated the readout can be set to the SCAN mode 15 With the thermometer in either the T1 T2 or T1 T2 mode corre VIEW sponding MIN MAX data can be viewed To view MIN MAX data first select T1 T2 or T1 T2 Then press the VIEW key to read the MAX temperature A second press of the VIEW key will display the MIN temperature At the third press of the VIEW key the dis play will go back to display the current temperature To view a dif ferent input select that input and repeat the procedure NOTES MIN MAX data can be viewed while recording is in progress ie REC annunciator s flashing In this case the VIEW function will display real time running values of MIN or MAX temperatures MIN MAX data can be viewed after data recording is stopped See STOP CLR for instructions to stop recording In this case the VIEW function will dis play static data that
9. but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive corrosion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OMEGA s control Components which wear are not warranted including but not limited to contact points fuses and triacs OMEGA is pleased to offer suggestions on the use of its various products However OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with informa tion provided by OMEGA either verbal or written OMEGA warrants only that the parts manufactured by it will be as specified and free of defects OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER EXPRESSED OR IMPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED LIMITATION OF LIABILITY The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on contract warranty negligence indemnification strict liability or otherwise shall not exceed the purchase price of the component
10. does not upcate The VIEW function cannot be initiated while the readout is in the SCAN mode For example to view the MAX value recorded for T2 first select mode T2 then depress the VIEW key After selecting parameters to view it is possible to go to the SCAN mode and continue to view these parameters Example While in mode T1 view MAX Then select mode T2 and view MIN When SCAN is activated the readout will sequentially display T1 MAX T2 MIN T1 T2 This is a very powerful tool for analytical temperature analysis If VIEW is enabled in a mode T1 T2 or T1 T2 that was not recorded the MAX and MIN annun ciators will turn on as before However the numer ic readout will indicate the current temperature Without RECORD being activated the current reading the maximum and the minimum readings are equivalent 16 Recording in one or more of the three measurement modes T1 T2 and T1 T2 can be stopped with this key Before pressing CLR this key select the appropriate mode When MIN MAX data col lection is stopped the corresponding REC annunciator will stop flashing but will remain on to indicate that MIN MAX data has been saved for viewing Recording can be re started anytime without loss of data with the REC key See REC If the STOP CLR key is pressed again after stopping data record ing MIN MAX data for the corresponding measurement mode is cleared and the REC annunciator is turned off NOTES
11. to degrees Fahrenheit press the TEMPERATURE SCALE key a second time NOTE Key selection is retained during power off 13 SENSOR SELECT HOLD 1 2 T1 T2 The DISPLAY RESOLUTION key selects whether the tempera ture readings will be displayed in high resolution 0 1 C or F or low resolution 1 C or F At initial power up the thermometer will read in high resolution NOTE Key selection is retained during power off The THERMOCOUPLE TYPE SELECTION key selects which type of thermocouple the thermometer will be set up to use Type K J or T Upon initia power up the thermometer will be ready to accept a K Type thermocouple To change the thermometer to accept a Type J thermocouple press the THERMOCOUPLE TYPE SELECTION key Press the key a second time to select Type T To change back press the key until desired type is dis played Thermocouple probe plugs are color coded Type K Thermocouples have a yellow plug Type J Thermocouples have a black plug and Type T Thermocouples have a blue plug NOTES Key selection is retained during power off To insure proper temperature readings be sure that the displayed thermocouple type matches the type of thermocouple you are using The HOLD key when pressed will freeze the temperature read ings on the display To get out of the Hold mode press the HOLD key a second time The INPUT SELECTION SCAN key selects which thermocouple i
12. 1 Display Hold Record MIN MAX View MIN MAX Stop recording MIN MAX first keystroke clear recorded MIN MAX second keystroke 9 o POWER OFF CONFIGURATION RETENTION Instrument retains last selected Readout T1 T2 T1 T2 SCAN TC type K J T Resolution 0 1 1 Scale F C DIAGNOSTICS Display codes indicate the following conditions Low Battery BAT Open Thermocouple s OPEN Invalid Keypad Entry Momentary E 1 Temperature Reading exceeds TC Rating 2 Internal Hardware Fault E 3 consult factory LCD Test During power up all segments annunciators turned on momentarily ELECTROMAGNETIC COMPATIBILITY Add 0 5 of range to accuracy specific tions for RF fields up to 1 volt meter Accuracy not specified for fields greater than 1 volt meter DIMENSIONS WEIGHT 7 0 x 2 9 x 1 1 Net weight 10 oz DIFFERENCE SPECIFICATIONS MODEL HH 21A THERMOCOUPLE INPUTS 1 DISPLAY 5 digit LCD 0 4 height Polarity indication and decimal point Annunciators Readout Scale F C TC Type K J Hold when activated KEYPAD 5 momentary switches with tactile feedback select Power ON OFF e TC type K J T Readout scale F C Resolution 0 1 1 Display Hold POWER OFF CONFIGURATION RETENTION Instrument retains last selected TC type K J T Resolution 0 1 1 Scale F C MODEL HH 22A THERMOCOUPLE TYPES K J
13. 23A except operation is limited to K and J thermocouples 1 DIAGNOSTICS Automatic diagnostics provide error indicators which are described below PROBLEM LIKELY CAUSE Blank display unit does not 1 Improper battery installation Check power up battery polarity 2 Dead battery Low BAT Annunciator 1 Low battery voltage install a new battery If problem persists consult factory Display reads li 1 No thermocouple or a damaged ther mocouple is plugged into the selected input NOTE When viewing 1 2 there must be a thermocouple plug ged into both input jacks P Z i Display reads f momentarily 1 This indicates that an invalid entry has been made Review keystroke se quence or consult manual for input instructions E23 re Display reads L during 1 This indicates the temperature range temperature measurement has been exceeded for this thermo couple type Remove thermocouple from temperature source WARNING Do not touch the probe sheath when measuring excessively high or low temperatures WARNING Probe damage and personal injury could result from exceed ing a probes maximum tempera ture ratings 2 DISPLAY ANNUNCIATORS Each item on the display Figure 2 is described below in detail To better familiarize yourself with the thermometer s display annunciators please read this section 1 Input Selection Annunciator This annunciator will indicate which input i
14. H 22 and HH 23 Set calibrator output to 32 F type K Wait for U U T readout to stabilize then press HOLD key once and wait a few seconds U U T should read 32 0 F 0 5 F type K Set calibrator to 2500 F type K Wait for U U T readout to stabilize then press HOLD key once and wait a few seconds U U T should read 2500 0 F 1 0 F type K Replace type K cable with Type J 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Set calibrator output to 32 F type J Wait for U U T readout to stabilize then press HOLD key once and wait a few seconds U U T should read 32 0 F 0 5 F type J Set calibrator output to 1400 F type J Wait for U U T readout to stabilize then press HOLD key once and wait a few seconds U U T should read 1400 0 F 1 0 F type J NOTE On Model HH 22 go to step 21 to complete calibra tion On Models HH 21 and HH 23 continue calibra tion at step 15 Replace type J cable with Type T Set calibrator output to 32 F type T Wait for U U T readout to stabilize then press HOLD key once and wait a few seconds U U T should read 32 0 F 0 5 F type T Set calibrator output to 750 F type T Wait for U U T reading to stabilize then press HOLD key once and wait a few seconds U U T should read 750 0 F 1 0 F type T Press HOLD key one last time Wait for HOLD annunciator to show on readout Indicates that calibration data i
15. SCAN T1 T2 T1 T2 ACCURACY 18 C to 28 C ambient 2 years excludes thermocouple error Extended Temp Type Range Resolution K 0 C to 1372 C 32 F to 2502 F 200 C to 0 C 328 F to 32 F 0 C to 760 C 32 F to 1400 F 210 C to 0 C 346 F to 32 F 0 C to 400 C 32 F to 752 F 200 C to 0 C 328 F to 32 F 0 1 1 C 0 1 1 F 0 1 1 C 0 1 1 F Accuracy T1 T2 0 1 rdg 0 6 C 0 1 rdg 1 0 F 0 3 rdg 0 6 C 0 3 rdg 1 0 F Accuracy T1 T2 1 2 T1 T2 1 2 Accy T1 T2 Range Acc y T1 T2 Typ 200 C to 250 C 3 328 F to 418 F 5 F 0 1 rdg 0 6 C 0 1 rdg 1 0 F 0 3 rdg 0 6 C 0 3 rdg 1 0 F 0 1 rdg 0 6 C 0 1 rdg 1 0 F 0 3 rdg 0 6 0 3 rdg 1 0 F 1 2 1 T2 T1 T2 1 2 T1 T2 1 2 T1 T2 1 2 200 C to 250 C 3 328 F to 418 F 5 F REPEATABILITY 0 2 C typical for 1 week at constant ambient temperature TEMPERATURE COEFFICIENT 18 C to 28 C included in accuracy specification From 0 C to 18 C and 28 C to 50 C less than 0 02 rdg 0 1 C
16. a microwave oven CAUTION Avoid making sharp bends in probe or sensor lead wires Bending lead wires at a sharp angle can damage the wire causing probe failure CAUTION When using both thermometer inputs and a voltage differ ential exists between the two measurement points at least one probe should be electrically insulated If not ground loop current can flow through the thermocouple leads causing measurement error or instrument damage BATTERY INSTALLATION REPLACEMENT A 9V battery is supplied with the instrument but not installed Read the fol lowing installation instructions before attempting to install or remove the bat tery WARNING Turn the unit off and disconnect any input connections before replacing the battery Put the cover back into place on the battery compartment before resuming use of the instrument 1 Remove the cover from the battery compartment by sliding it off in the direction of the arrow located on the battery cover 2 Remove the old battery and wait at least 20 seconds before installing the new battery 3 Place the new battery in the battery compartment Be sure to observe proper polarity 4 Re install the battery cover before resuming use of the instrument Figure 1 Battery Installation NOTES Less than 10 of battery life remains when the BAT annun ciator turns on If the instrument is going to be stored for a long period of time or in a high temperature environment remove the b
17. attery to prevent leakage damage After a new battery is installed allow approximately 30 sec onds for reading stabilization the first time the instrument is turned on The ON button may need to be pressed twice the first time the unit is turned on after battery replacement MADE IN THE U S A MADE IN THE U S A TYPE K TC NiCr NiAl TYPE J TC Fe CuNi TYPE T TC Cu CuNi N Figure 2 Display Keypad Formats for Models 21 8 HH 23A MEMORY BACKUP During battery replacement the contents of user programmed memory data operating modes etc can be saved Prior to removing the old battery turn off the instrument and connect a Model HH22A AC battery charger in the U S A Then exchange batteries and disconnect the battery charger Do not leave the battery charger connected to instruments with non rechargeable batteries OPERATION WITH RECHARGEABLE BATTERY Model HH22A AC provides a 9 volt Ni Cd battery and recharger suitable for use with the unit in the U S A This battery provides 15 hours of continuous operation This duration can be extended indefinitely by operating simultane ously from both the battery and recharger OPERATING INSTRUCTIONS The following instructions make reference to keypad inputs and display read outs Refer to Figure 2 to locate key switches and identify display differences between thermometer models Model HH 22A is similar in layout to the HH
18. cautions usa oe tage nei ees 6 Battery Installation Replacement 8 Memory Backup coco v ER ERR a 9 Operation with Rechargeable 9 Operating 1 5 5 9 1 Diagnostics aan ea ee 9 2 Display amp 11 3 FUNCI N Keys es ent a 13 Service 18 1 Calibration 18 2 Disassembly 1 5 19 3 Mechanical Parts 21 GENERAL INFORMATION This manual provides information on the use of three digital handheld ther mometers Functional features both common and unique to each model are described All three models are microprocessor based and provide accurate and reliable operation They function with the most popular thermocouples types K J and T A variety of features in these projects enhance their versatility while simplifying operation It is recommended that you read this manual thoroughly especially the sections on safety prior to operating these instruments SPECIFICATIONS THERMOCOUPLE INPUTS 2 T1 T2 miniature TC connectors Accepts male miniature and subminiature TC connectors THERMOCOUPLE TYPES K J T READOUT T1 T2 T1 T2 and
19. d in this manual explains dangers that could result in personal injury or death The CAUTION used in this manual explains hazards that could damage the instrument SAFETY PRECAUTIONS WARNING These instruments are intended for use by qualified per sonnel trained in the safe operation of electronic testing equipment Read the instruction manual thoroughly before using to become familiar with the instrument s operations and capabilities WARNING Do not touch a temperature probe sheath when measuring excessively high or low temperatures or toxic substances WARNING Do not attempt to measure temperatures beyond the range of the probe being used Probe damage or personal injury could result from exceeding a probe s maximum tempera ture rating WARNING The American National Safety Institute ANSI states that a shock hazard exists when probes or sensors are exposed to voltage levels greater than 42VDC or 42V peak AC Do not use this instrument where voltages at the measure ment surface exceed these levels WARNING Do not substitute a metal part for the nylon screw in the rear case Doing so will degrade electrical isolation of the case WARNING The battery is accessible through a cover on the back of the instrument To avoid electrical shock hazard discon nect all temperature probes and sensors and turn the unit off before removing the cover WARNING Never use this instrument or any probe or sensor inside
20. ng OMEGA information available BEFORE 1 P O number under which the product was contacting OMEGA PURCHASED 1 P O number to cover the COST 2 Model and serial number of the product under of the repair warranty and 2 Model and serial number of product and 3 Repair instructions and or specific 3 Repair instructions and or specific problems problems relative to the product relative to the product CMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering CMEGA is a registered trademark of OMEGA ENGINEERING INC 2 Copyright 1996 OMEGA ENGINEERING INC All rights reserved This document may not be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without prior written consent of CMEGA ENGINEERING INC Where Do Find Everything Need for Process Measurement and Control OMEGA Of Course TEMPERATURE Id Thermocouple RTD amp Thermistor Probes Connectors Panels amp Assemblies BF Wire Thermocouple RTD amp Thermistor 4 Calibrators amp Ice Point References Recorders Controllers amp Process Monitors LY Infrared Pyrometers PRESSURE STRAIN AND FORCE WY Transducers amp Strain Gauges Load Cells Pressure Gauges Y Displacement Transducers iA Instrumentation amp Accessories FLOW LEVEL L Rotameters Gas Mass
21. nput the thermometer will display thermocouple T1 thermocou ple T2 or the difference between thermocouples T1 and T2 Upon initial power up the thermometer will default to channel T1 To select channel T2 press the INPUT SELECTION key input selection annunciator will appear To view the difference between the two inputs calculated as T1 minus T2 press the INPUT SELECTION key a second time input selection annunci ator T132 will appear To scan inputs T1 T2 T1 T2 press the INPUT SELECTION SCAN key a third time The SCAN annunciator will then appear The unit will then sequentially display the readings of T1 T2 and T1 T2 To return to T1 press the key again REC NOTE The thermometer will display OPEN on any selected channel that does not have a thermocouple plugged in or if the thermo couple is open circuited CAUTION When using both thermocouple inputs and a voltage differential exists between the two mea surement points at least one probe should be electrically insulated NOTES T1 and T2 are not measured simultaneously Therefore T1 and T2 readings can differ even when the temperatures are equal if T1 and T2 are changing rapidly Key selection is retained during power off With the REC key the recording of MIN MAX temperatures is enabled This function can be activated in one or more of the 3 measurement modes T1 T2 and T1 T2 To start recording select a desired measurement mode
22. s being monitored thermocouple T1 thermocouple T2 the difference between the two thermocouples T1 T2 11 12 oma Record Annunciator A flashing record symbol adjacent to a corresponding input selection annunciator indicates that this channel is being recorded A static record symbol indicates data has been recorded but is not being updated y When the up arrow is displayed the reading is increasing When the down arrow is displayed the reading is decreasing When both arrows are displayed the reading is stable When the second arrow is flashing on and off the sensor is approach ing a stable reading Trend Indication Annunciators BAT Low Battery Annunciator This symbol appears when less than 10 of battery life remains KJT Thermocouple Type Annunciator These symbols indicate the thermocouple type selection NOTE To insure correct temperature readings the displayed thermocouple type must match the thermocouple used Numeric Display The 5 digit numeric display indicates the temperature of the selected thermocouple T1 or T2 or T1 T2 C F Temperature Scale Annunciators The C and F symbols indicate whether the temperature readings are displayed in degrees Celsius or degrees Fahrenheit MIN Minimum Annunciator This symbol appears when the display is showing the minimum reading stored while in the record mode MAX Maximum Annunciator This symbol appears when the di
23. s stored in EEPROM Carefully remove battery cover while holding battery in place Loss of battery power at this time will cause loss of calibration data Remove back cover while holding battery in place Remove shorting plug J1 from the Cal position only to write protect EEPROM Turn off U U T and remove battery Replace rear cover and battery cover and then re install battery Calibration is complete 2 DISASSEMBLY INSTRUCTIONS Before opening the case remove all input output connections This includes input sensors calibration cables and the optional battery charger Turn the instrument face down and remove the three Phillips head screws from the rear cover Lift off the rear cover The circuit board can be lifted from the front case after removal of the hexagonal standoff NOTE Be sure to keep the case face down during this last step Otherwise the LCD and its associated hardware may fall free and break 19 Re assembie the instrument by following the reverse of the above procedure 20 CAUTION Do not use excessive torque when re installing the nylon machine screw into the rear case Excess torque will dam age the part WARNING Do not substitute a metal part for the nylon machine screw Doing so will degrade the electrical isolation of the instru ment 3 MECHANICAL PARTS DIAGRAM BOTTOM COVER TILT BAIL WRIST BAND MODEL HH 21 819 307 8660 304 1 820 309 HH 22 819 307 HH 23 819A 307 NYLON
24. splay is showing the maximum reading stored while in the record mode 10 HOLD Hold Annunciator This symbol will indicate that the instrument display is on hold 11 SCAN Scan Annunciator This annunciator will be displayed when the instrument is sequentially viewing T1 T2 and T1 T2 3 FUNCTION KEYS 2 OFF The ON OFF key turns the thermometer on or off To turn the ther mometer on press the ON OFF Key once All the display annun ciators and segments should turn on momentarily see Figure 2 for visual checking During this period the thermometer performs internal diagnostics Following display test if no input thermocouple is connected to the unit the display will indicate OPEN Plugging a thermocouple into the appropriate TC connector will give actual thermocouple temperature readings If the unit is turning on for the first time after installation of a new battery it will default to K type thermocouples and F readings with 0 1 resolution NOTE To obtain full accuracy allow 1 2 minutes after connecting a thermocouple plug for thermal setting To turn the thermometer OFF press the ON OFF key a second time The TEMPERATURE SCALE key selects whether temperature readings will be displayed in degrees Fahrenheit or degrees Celsius Upon initial power up the thermometer will display read ings in degrees Fahrenheit To display readings in degrees Celsius press the TEMPERATURE SCALE key To change back
25. upon which liability is based In no event shall OMEGA be liable for consequential incidental or special dam ages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OMEGA assumes no responsibility as set forth in our basic WARRANTY DISCLAIMER language and additionally purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product s in such a manner pu RETURN REQUESTS INQUIRIES Direct all warranty and repair requests inquiries to the OMEGA Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST OBTAIN AN AUTHORIZED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned AR number should then be marked on the outside of the return package and on any correspondence The purchaser is responsible for shipping charges freight insurance and proper packaging to prevent breakage in transit FOR WARRANTY RETURNS please have the fol FOR NON WARRANTY REPAIRS consult OMEGA lowing information available BEFORE for current repair charges Have the following contacti
Download Pdf Manuals
Related Search