TM User’s Guide
TMUser’s GuideShop online atomega.com SMe-mail: info@omega.comFor latest product manuals:www.omegamanual.infoCL940A, CL945ADigital TemperatureCalibrator–Thermometer
Where Do I Find Everything I Needfor Process Measurement and Control?OMEGA Of Course!Shop online at omega.com SMTEMPERATUREMUMUMUMUMUThermocouple, RTD & Thermistor Probes, Connectors, Panels & AssembliesWire: Thermocouple, RTD & ThermistorCalibrators & Ice Point ReferencesRecorders, Controllers & Process MonitorsInfrared PyrometersPRESSURE, STRAIN AND FORCEMUMUMUMUTransducers & Strain GagesLoad Cells & Pressure GagesDisplacement TransducersInstrumentation & AccessoriesFLOW/LEVELMUMUMUMURotameters, Gas Mass Flowmeters & Flow ComputersAir Velocity IndicatorsTurbine/Paddlewheel SystemsTotalizers & Batch ControllerspH/CONDUCTIVITYMUMUMUMUpH Electrodes, Testers & AccessoriesBenchtop/Laboratory MetersControllers, Calibrators, Simulators & PumpsIndustrial pH & Conductivity EquipmentDATA ACQUISITIONMUMUMUMUMUCommunications-Based Acquisition SystemsData Logging SystemsWireless Sensors, Transmitters, & ReceiversSignal ConditionersData Acquisition SoftwareHEATERSMUMUMUMUMUHeating CableCartridge & Strip HeatersImmersion & Band HeatersFlexible HeatersLaboratory HeatersENVIRONMENTALMONITORING AND CONTROLMUMUMUMUMUMUCL940A Rev. AMetering & Control InstrumentationRefractometersPumps & TubingAir, Soil & Water MonitorsIndustrial Water & Wastewater TreatmentpH, Conductivity & Dissolved Oxygen InstrumentsM5725/0219
Table of ContentsTABLE OF CONTENTS1. Instrument Description . 1-1Specifications . 1-1OMEGA Family of Thermometers. 1-52. Preparation for Use . 2-1General Information . 2-1Feature Overview . 2-1Safety Notices and Information . 2-2Unpacking and Inspection . 2-4Battery Installation and Replacement . 2-4Initial Power ON . 2-53. Operating Instructions . 3-1Keypad Functions . 3-1LCD Display . 3-2Setup Menu . 3-4View Modes and Statistics . 3-6Auto-Power Off . 3-7Backlight and Backlight Timeout . 3-8Operating Modes . 3-8Trend Indicators . 3-9Battery Indicator . 3-9Probe Offset . 3-9Open Lead Detection Enable/Disable . 3-11Clear Function. 3-11Presets: Save, Recall and Erase . 3-12Invalid Measurement Indications . 3-134. Service Information. 4-14Inspection and Cleaning . 4-14Calibration . 4-14Troubleshooting . 4-19Diagnostic Routines and Error Codes . 4-20Memory Sterilization . 4-20Statement of Calibration. 4-21A. Required Equipment . A-iB. Expanded Instrument Uncertainties . B-iC. Instrument Verification Data Sheet . C-i
Instrument Description1. INSTRUMENT DESCRIPTIONSpecificationsSource/MeasureAccuracy 0.003% * [READING] 5µV 18 TO 28 C 1RESOLUTION0.01 CRANGE-15MV TO 85MVCOLD JUNCTION ERROR 0.15 CDISPLAYUP TO999.99 CAND0.1 C 1000 C5-DIGIT AUTO-RESOLUTION RACY1 OVER RANGE OF 18 TO 28 C (64.4 TO 82.4 F) CJC error includedConformityTemperature RangesK-230 C - 1372 C-382 F - 2502 FJ-200 C - 1200 C-328 F – 2192 FT-260 C – 400 C-436 F – 752 F1ITS-90Types B,E,J,K,N,R,S,TEN 60584-1 2013Type CASTM E988 Table 3Type DASTM E1751 5.1.1Type GDIN 43710Types L and UASTM E1751 5.1.2Type P C Range C-230 to -160 1.2 to 0.6-160 to -90 0.5 to 0.4-90 to 380 0.3380 to 665 0.2665 to 1372 0.3-200 to -160 0.7 to 0.5-160 to -110 0.4-110 to 10 0.310 to 1200 0.2-260 to -190 2.6 to 0.7-190 to -120 0.6 to 0.5-120 to -70 0.4-70 to 80 0.380 to 400 0.2See Graphs in Appendix B for Expanded Uncertainties1-1
Instrument Description-240 to -150 1.2 to 0.4-150 to -100 0.4-100 to 20 0.320 to 1000 0.2310 to 595 1.8 to 1.0595 to 830 0.9830 to 965 0.7965 to 1820 0.6-230 to -150 1.6 to 0.7-150 to -50 0.5-50 to 215 0.3215 to 1300 0.2-15 to 100 1.2 to 0.8100 to 240 0.7240 to 495 0.6495 to 1768 0.5-20 to 75 1.2 to 0.975 to 150 0.8150 to 285 0.7285 to 1768 0.6100 to 240 1.0 to 0.6240 to 310 0.5310 to 460 0.4460 to 2315 0.3C0 C – 2315 C32 F – 4199 F0 to 60 0.560 to 2200 0.42200 to 2315 0.5D0 C – 2315 C32 F – 4199 F0 to 100 0.6 to 0.5100 to 230 0.4230 to 2315 0.3E-240 C – 1000 C-400 F – 1832 FB2310 C – 1820 C590 F – 3308 FN2-230 C – 1300 C-382 F – 2372 FR2-15 C – 1768 C5 F – 3214 FS2-20 C – 1768 C-4 F – 3214 FG2100 C - 2315 C212 F – 4199 F222Thermocouple types B, N, R, S, C, D, G, P, L and U are model CL945A only.1-2
Instrument DescriptionP20 C to 1395 C32 F to 2543 FL2J-DIN-200 C - 900 C-328 F – 1652 FU2T-DIN-200 C – 600 C-328 F – 1112 F0 to 1395 0.3-200 to -90 0.6 to 0.4-100 to -40 0.4-40 to 655 0.3655 to 665 0.4665 to 900 0.3 0.8 to 0.5-200 to -75-75 to 0 0.4-0 to 385 0.3385 to 600 0.2Connector TypeTwo (2) Mini-TC CopperTemperature Units C, F, mVProbe Zero FunctionResolution 0.1 C/ FReading Rate3/sec. for Readings and TREND indicatorsBattery Type3 AA (IEC LR6, ANSI 15) AlkalineBattery Life500 Hours TypicalBattery IndicatorFour (4) Stage Battery Charge IndicatorDisplayTwo (2) rows of Five (5) digit LCD with separate minussign, decimal indicators, with offset, thermocouple typesKJTEBNRSGCDPLU, battery, source, read, temperatureunits, voltage units, percent, trend, PRST (0-19), MIN,MAX, AVG, RNG, STDEV, Transfer, symbols: Fast Ramp,Slow Ramp, Step, BluetoothStatisticsMinimum Reading, Maximum Reading, Average Reading,Reading Range, Standard DeviationDisplay BacklightFour (4) LED Backlight with 30-second timeoutDisplay Resolution0.01 1000 Auto Off20 minute no key pressed Auto Off. Feature can bedisabledKeypadTwelve (12) momentary switches with audible and tactilefeedbackPower CycleConfigurationRetentionInstrument retains: Sensor Type, Temperature UnitOffset Values, Presets, Statistics, Open Lead detectionstatus, 0%/100% span settings, and operating modeInternal Preset Storage20 Preset user-determined storage registers, 0-191-3.1 1000
Instrument DescriptionInput Current 50 nA maximumMaximum CommonMode Voltage42 V peak to earthLow Resistance LoadLess than 5µV change in output with a 100KΩ resistance1 V p-p between T1 and T2OperatingEnvironmentOperating Temp-20 to 55 C-4 to 131 FStorage Temp-51 to 71 C-59.8 to 159.8 FHumidity 10 C (50 F): Non-condensing10 to 30 C (50 to 86 F): 5 to 95% RH30 to 40 C (86 to 104 F): 5 to 85% RH40 C to 55 C (104 to 131 F): 5 to 60% RHAltitude0 to 4600 mVibrationRandom 10 – 500 Hz, 0.03 g /HzShock30g Half SineDrop4 Drops from 1 m to Concrete0 to 15,092 ft2Compliance, ElectricalCE, MIL-PRF-28800F Class 2Compliance,SubstancesRoHS 2 Directive, 2011/65/EU Compliant, REACHElectrical SafetyIEC-61010EMCEN 61326, MIL-PRF-28800F, Class 2ESDIEC 61326 Criterion BSanitationNSF/ANSI/3-1 14159-2StandardsMIL-PRF-28800F, Class 2TemperatureCoefficientFor specification variances due to ambient operating temperature,see the Expanded Instrument Uncertainty charts in Appendix B ofthis manual. For ambient operating temperatures not shown inAppendix B, accuracies shall be interpolated linearly.Included Accessories3 AA Batteries, Quick Start Guide, Tilt Stand/Magnetic,Calibration ReportPHYSICALCHARACTERISTICS:Dimensions193 x 84 x 28 mm7.6 x 3.3 x 1.1 inWeight includingBatteries362.9g12.8 oz.1-4
Instrument DescriptionOMEGA Family of uple Thermometer, Single InputHH912TThermocouple Thermometer, Dual InputDataThermometersHH931TData Thermometer, Single InputHH932TData Thermometer, Dual Input1-5
Preparation for Use2. PREPARATION FOR USEGeneral InformationThis manual provides operating instructions and maintenance information for two calibratorinstruments, CL940A and CL945A. These instruments are high performance calibratorthermometers capable of simulating and measuring a wide-variety of sensors. In addition,features such as high accuracies, preset storage, ramp, step and transfer modes furtherenhance their versatility.It is recommended that you read this manual thoroughly, especially the sections on safety,prior to operating these instruments.Feature Overview 0.01 / 0.1 display resolutionInternal storage for 20 presets500-hour battery life 3Five (5) digit dual LCD with LED Backlight Simultaneous Source/MeasureComprehensive real-time statistics: MIN, MAX, AVG, RNG, and STDEVEasy to cleanProbe offset function to minimize probe error F, C, and mV temperature and voltage unitsDurable: Meets MIL-PRF-28800F, Class 2 requirementsTilt Stand/Magnet/Hanger3 Typical battery life under normal use conditions in laboratory environment. Continuous or repeated use offeatures such as the backlight or use or storage at high or low temperature extremes may reduce battery life.2-1
Preparation for UseSafety Notices and InformationRead this Operation Manual thoroughly before using the instrument to become familiar with itsoperations and capabilities.Visually inspect instrument before using. Do not use if unit appears damaged or with any part of thecase removed.WARNINGMAINTENANCE INSTRUCTIONS WITHIN THIS MANUAL ARE FOR USE BY QUALIFIED SERVICEPERSONNEL ONLY. DO NOT ATTEMPT TO SERVICE THIS UNIT UNLESS YOU ARE QUALIFIED TO DOSO.SHOCK HAZARDDisconnect all temperature probes and turn the unit off before removing the battery cover.Never connect thermocouple leads to any source where more than 42 Volts (peak) could existbetween the lead and ground. If it is necessary to make measurements of an object at elevatedelectrical potential, the user is responsible for obtaining and properly using a probe that providesadequate insulation between the surface with elevated potential and the thermocouple wiring.Always disconnect probe leads before opening the battery door or the instrument housing.Internal circuits can present a shock hazard if leads are connected to a source of elevated potential.Do not use this instrument if the housing, probe wiring, probe, or probe handle are damagedor distorted. Housings and wire insulation are part of the personnel protection system, and if damagedcould expose users to elevated potentials.EXPLOSION HAZARDNever use or store this product with batteries installed, or change batteries, in anenvironment where explosive or flammable vapors or dust suspensions may exist. Forthermocouple thermometers suitable for use in explosive environments, see Error! Reference sourcenot found.’s 921A or 922A Intrinsically Safe Thermometers.Do not attempt to recharge alkaline batteries.Do not put batteries into bags designed to protect parts from electrostatic discharge (ESD).These bags are specially designed with metal shielding which can short circuit a battery.Do not expose batteries to extreme heat or fire. Observe all regional laws and regulations whendisposing batteries.Never use this instrument or any temperature probe or sensor inside a microwave oven.BURN HAZARDDo not touch a temperature probe sheath that has been exposed to toxic substances orextremely high or low temperatures.Do not attempt to measure temperatures beyond the range of the temperature probe. Probedamage or personal injury could result from exceeding a probe’s maximum temperature rating.Safety Notices and Information continued on next page . . . .2-2
Preparation for UseCAUTIONRISK OF INCORRECT READINGDo not use when AC or DC voltages in excess of 1V exist between thermocouple channels (oninstruments with more than one channel). Excessive voltage could result in an incorrect reading,or in more extreme cases, a blown fuse that will result in incorrect readings and need for repair.RISK OF INSTRUMENT DAMAGEOnly replace batteries with size AA (IEC LR6, ANSI 15). Observe proper polarity when installingbatteries. Do not mix old and new batteries.Do not apply voltages across thermocouple leads in excess of normal thermocouple voltagefor the selected range. Excessive input voltage could result in blown fuse, component damage, orfire. Application of excessive voltage is not covered by the warranty.Avoid making sharp bends in probe or sensor lead wires. Bending lead wires at sharp angles candamage the wire and cause probe failure.When using both thermometer inputs and a voltage differential exists between the twomeasurement points, at least one probe should be electrically insulated. If not, a ground-loopcurrent can flow through the thermocouple leads causing measurement error or instrument damage.Static discharge through a connected temperature probe may cause instrument damage. Usecare to avoid static discharge when handling the instrument or connected probes.2-3
Preparation for UseUnpacking and InspectionEach instrument is electrically and mechanically inspected before shipment. Upon receivingyour new OMEGA Data Thermometer, unpack all items from the shipping container andcheck for any obvious damage that may have occurred during transit. Use the originalpacking materials if reshipment is necessary.If any dents, broken, or loose parts are seen, do not use the equipment. Notify OMEGAimmediately.Check that all items are present. If any items are missing, notify OMEGA immediately.The following items are included with every new instrument: One (1) Calibrator Thermometer;One (1) Quick Start Guide;Calibration Report;Three (3) AA, 1.5 V batteries; andOptional accessories (if purchased).Battery Installation and ReplacementThree (3) AA 1.5 V batteries are supplied with the instrument, but not installed. Read thefollowing battery replacement instructions before attempting to install or remove thebatteries.CAUTIONAlways turn the instrument off and disconnect any input connections before replacingthe batteries. Re-install the battery compartment cover before resuming use of theinstrument.CAUTIONThe battery compartment is sealed with a rubber gasket. Use care to not damage thegasket when removing or installing the battery compartment cover.CAUTIONRemove the batteries when storing the instrument for an extended period of time orin a high temperature environment to prevent battery leakage and possible damageto the instrument.All measurement parameters may be reset to factory default if batteries are removed whilethe instrument is powered on. Always turn the instrument off before changing batteries.To install or replace batteries:Required Tools: Phillips Head Screwdriver1.Identify the battery compartment located on the back of the instrument (seeFigure 1 below);2.Remove the two (2) battery compartment retaining screws;3.Remove the battery compartment cover;4.If present, carefully remove old batteries being careful to not damage the batterycontacts;2-4
Preparation for Use5.Observing proper polarity, install three (3) new, AA alkaline (IEC LR6, ANSI 15)batteries;6.Re-install the battery cover and two (2) retaining screws;7.At initial power on after battery replacement, allow approximately 30 seconds forinstrument to igure 1: Battery InstallationInitial Power ONOMEGA’s 900 Series Calibrator Thermometers are designed for easy operation, while stillproviding a feature-rich experience via the intuitive user interface.To get started follow these steps:1.Perform Section 2.5, Battery Installation and Replacement;2.The instrument will initially display every segment on the LCD for 2 seconds as atest. An internal hardware, memory and battery self-test is performed during thistime.3.Upon completing the internal tests, the instrument will immediately display theSource and Read mode last user settings and battery indicator.4.Set the desired measurement parameters as follows:a.Enter the Setup Menu by pressing, hold the key down forapproximately 1.5 seconds, and then release it;b.The active thermocouple type is flashing on the display. Useto select the desired thermocouple type. You are setting thethermocouple type of the Read Channel.;2-5or
Preparation for UseThearrows always change a value. Thearrows positionthe cursor or will act to select only when changing Thermocouple type,desired digit or changing the mode.c.Momentarily (do not hold) pressthe next parameter;d.The active temperature unit is flashing on the display. Useselect the desired temperature unit ( C, F, or mV);e.Momentarily pressparameter;f.to save your selection and move tototo save your selection and move to the nextRead Channel 2 offset value is flashing on the display. If thetemperature probe’s offset value is known, pressto set theChannel 2 probe offset to the probe’s offset value. See Section 3.10,Probe Offset, for more information.g.Momentarily pressDetection, pressto save your selection and move to Open Leadto toggle on/off;h.Momentarily pressto save your selection and move to Source on/off;See Section 3.3, Set Up, figure 4 for more information.i.To save the current parameter value and exit the Setup Menu, pressj.To disregard changes made to the current parameter value and exit theSetup Menu, press.2-6;
Operating Instructions3. OPERATING INSTRUCTIONSKeypad FunctionsThe instrument keypad is a twelve (12) key, sealed membrane keypad. Each key providesaudible and tactile user feedback when pressed. Key functions are described in Figure 2below.Power instrument ON or OFF and exits KeyLock mode.(1.5s)Disable auto-power OFF(1.5s)Enter instrument Setup MenuWhile in Setup Menu, save current value andstep to next parameterToggle display backlight(1.5s)(1.5s)Disable backlight 30-second timeoutWhile in Setup Menu, discard all unsavedchanges and exit menuDelete all saved measurement data andreset all statistics currently stored in(1.5s)memory, MIN/MIX/AVG/RNG/STDEVWhile in PRST selection mode with PRST flashing, erases current presetnumber contentsDisplays in order: Current Source Channel reading, MIN, MAX, AVG, RNG,STDEVWhile in Setup Menu, save changes and exit menuWhile displaying Cold Junction Compensation (CJC) reading, toggles betweenCJC 1 and CJC 2(1.5s)Displays Cold Junction Compensation (CJC) readings.The 10%/90% key toggles between 10% and 90% of span. The first pressof the key goes to 10%.The 0%/ 25% key manually increments the output by 25% of the definedspan for the selected TC. Once the output reaches 100% the next press ofthe key will wrap around to 0%.Once in Preset, single press saves and exits leaving the selected presetnumber active(1.5s)Enters the
Shop online at omega.co. m. SM. User ’s Guide. Where Do I Find Everything I Need . for Process Measurement and Control? OMEGA Of Course! Shop online at omega.co. m. SM. TEMPERATURE. M. U Thermocouple, RTD & Thermistor Probes, Connectors, Panels &
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