Omega CL25 User Manual Download

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User’s Guide

CL23A, 24, 25, 26, 27

Digital Calibrator/Thermometer

Summary of Contents for CL25

Page 1: ...http www omega com e mail info omega com User sGuide CL23A 24 25 26 27 Digital Calibrator Thermometer...

Page 2: ...ee in France 0800 4 06342 e mail france omega com Germany Austria Daimlerstrasse 26 D 75392 Deckenpfronn Germany Tel 49 07056 3017 FAX 49 07056 8540 Toll Free in Germany 0130 11 21 66 e mail germany o...

Page 3: ...rror Messages 11 12 Initial Turn On 11 3 Meter Mode Operation Thermocouple 13 14 Meter Mode Operation RTD Thermistor Ohms 14 15 Data Logging Recall 15 16 Calibrator Mode Operation Thermocouples 17 17...

Page 4: ...PLE Miniature TC jack RTD OHMS THERMISTOR T series instrumentation connector THERMOCOUPLE TYPES K J T E N B R S G C D RTD TYPES 1100 platinum 0 00385 1000 platinum 0 00385 THERMISTOR TYPE 2252 YSI Ser...

Page 5: ...18 C and 28 C to 50 C K J T E N 0 002 rdg 0 03 C C B R S G C D 0 002 rdg 0 1 C C RTD THERMISTOR OHMS 0 002 rdg 0 004 rng C METER MODE INPUT CURRENT THERMOCOUPLES 50nA typ METER MODE READING RATE 1 re...

Page 6: ...Type F C Scale 0 1 1 Resolution Calibrator Meter Mode Memory Contents data storage and ramp parameters DIAGNOSTICS Display codes indicate following conditions BAT Low Battery OPEN Open Input Thermoco...

Page 7: ...to 18 C and 28 C to 50 C less than 0 006 rdg 0 03 C C RAMP FUNCTION Not Included BATTERY LIFE CONTINUOUS 16 hrs typical alkaline 4 hrs typical Ni Cd rechargeable MODEL CL24 SENSOR SELECTION K J T E T...

Page 8: ...to 11 thermocouple types 2 RTD types and thermistor 1 or 0 1 resolution over temperature range of each sensor F and C scales Reading hold mode 10 memory locations for saving meter readings and or cal...

Page 9: ...in the event reshipment is necessary Make sure that you have the following items in the packing box 1 CL20 Series Calibrator and Holster 1 Operator s Manual 1 NIST Certificate 1 Accessories Kit SAFETY...

Page 10: ...42V peak AC Do not use this instrument where voltages at the measurement sur face exceed these levels WARNING Do not substitute a metal part for the nylon screw in the rear case Doing so will degrade...

Page 11: ...i e electrically isolated probe at the thermometer input BATTERY INSTALLATION REPLACEMENT A 9V alkaline battery is supplied with the instrument but not installed Read the following installation instru...

Page 12: ...eriod microcomputer initialization is per formed MEMORY BACKUP During battery replacement the contents of user programmed memory data operating modes etc can be saved Prior to removing the old battery...

Page 13: ...for input instructions Display reads E2 momentarily 1 Attempt made to activate non installed ramp function NOTE RAMP Function enabled on Models CL25 and CL27 only Display reads HI 1 Meter mode input t...

Page 14: ...y is installed it will automatically default to the METER mode ie temperature measurement operation It also defaults to K type thermocouples and F readings with 0 1 resolution The corresponding LCD an...

Page 15: ...owing the power up LCD test If it does not turn off less than 10 of battery remains Refer to Battery Installation Replacement instructions 3 If the meter is already in the METER mode the METER annunci...

Page 16: ...reading is frozen and all keys except ON OFF and HOLD are locked out Depress the HOLD key again to return to real time readings and re enable the keypad 4 METER MODE OPERATION RTD Thermistor Ohms Set...

Page 17: ...rument to METER mode 3 Use the sensor select key to set the instrument to the appropriate func tion and range NOTE Due to limited display area 100 and 1000 RTD s are indicated on the display by a mome...

Page 18: ...n memory When data is stored in a location already filed with data the new data replaces the old Stored readings are retained during power off To Recall Readings 1 While in the METER OPR mode readings...

Page 19: ...BRATOR MODE OPERATION Thermocouples Set Up 1 Turn on the instrument by depressing the ON OFF key 2 Check that the BAT annunciator turns off after display check If not refer to Battery Installation Rep...

Page 20: ...yond the span of the selected TC type will cause a corresponding error code to be displayed To enter negative ie minus temperatures hit the 0 key first when in the NUM mode The first hit on this key e...

Page 21: ...Simulation 19 Figure 8 2 Wire Resistance Simulation Figure 9 3 Wire Resistance Simulation GRN RED BLK WHT NOTE Colors indicated apply to Model 84937 Calibration Cable mA current source Calibrator out...

Page 22: ...reading of 0 just hit the CLEAR while in the CALIB OPR mode Then depress STORE and a location number 20 1 The same performance tradeoffs apply to 2 3 and 4 wire simulations as to 2 3 and 4 wire measu...

Page 23: ...CALL 9 eg etc 4 To return the unit to the CALIB OPR mode after recalling the last set up hit the OPR key NOTES Any other key except ON OFF and CLEAR will also return the OPR mode Set ups recalled from...

Page 24: ...ng A second hit to the RAMP key starts automatic ramping A third hit turns off the RAMP function User definable RAMP memory locations 1 2 3 4 are dedicated to storage of RAMP parameters step size stai...

Page 25: ...alent 3 Calibration cables per Figures 11 12 13 NOTE The copper constantan cables used in Figures 12 and 13 need to be calibrated Voltage errors in these cables should be com pensated at the simulator...

Page 26: ...ed in EEPROM It also indicates that cold junction com pensation is disabled Flashing indicates that error corrections for the cold junction sensors can be stored or recalled from EEPROM 11 Clear the E...

Page 27: ...figure calibration set up per Figure 12 Allow 2 3 minutes for ther mal stabilization 11 Calculate E1 as follows E1 U U T Reading 32 0 12 Set U U T to CALIB OPR T F mode 13 Store E1 CHANGE E1 value ENT...

Page 28: ...ibrator Mode Zero Gain Adjustments exclusive of noise on EC models G replaced by L Calibrate L per J Sensor U U T U U T Step Select Input Adjust Reading 1 K 0 000 mV P1 32 0 0 1 F 2 K 54 856 mV P11 25...

Page 29: ...27 Figure 13 Calibration Setup Calibrator Mode Figure 11 Calibration Setup Copper Mode Figure 12 Calibration Setup Meter Mode...

Page 30: ...e humidity less than 80 Preparation For Calibration 1 Turn off unit and remove bottom cover Refer to Disassembly Instructions 2 Secure battery with a piece of adhesive tape NOTE Momentary loss of batt...

Page 31: ...29 Figure 14 Resistance Calibration Setup...

Page 32: ...ration Adjustments NOTE Do not deviate from the calibration adjustment sequence that follows This will ensure that adjustments to be stored in EEPROM go to the correct locations 1 Perform meter mode a...

Page 33: ...A 0 90000 0 00010v 9 10 000 10 0 100 A 0 00100 0 00010v Table 4 Calibration of Calibrator Mode Resistance Functions RTD 100 1000 exclusive of noise Sensor Unit Unit Step Select Input Adjust Verify Rea...

Page 34: ...Calibrator Mode Resistance Functions RTD Thermistor exclusive of noise 2 CALIBRATION VERIFICATION Calibration is verified with the same instrument hookups as used for calibra tion ie Figures 12 and 1...

Page 35: ...l Aluminum alloys Referring to the OMEGA Calibrator s in TC operation Alloy mode means in effect other than Copper mode In order to make accurate measure ments using a thermocouple device one must eli...

Page 36: ...are in the copper mode 11 While in the copper mode attach the Copper Mode Calibrator Verification Cable to the connector on the top of the CL25 that is labeled T1 Attach the other end of the cable to...

Page 37: ...voltmeter should read 1 438 mV 25 Press the SENSOR SELECT function button The sensor type will change to type R The B will disappear from the display and a R will appear on the display 26 Press the C...

Page 38: ...ion button The sensor type will change to type K The T and the R will disappear from the display and a K will appear on the display The voltmeter should read 0 000 mV 37 Press the OFF function button...

Page 39: ...any where a temperature is transmitted output by the Thermocouple Temperature Simulator you should adjust the Voltage Source to the equivalent voltage as listed by a Type K N I S T ITS 90 Thermocoupl...

Page 40: ...4 MECHANICAL PARTS DIAGRAM 38...

Page 41: ...nd the unit under test U U T should have 1 hour to reach thermal equilibrium with ambient tem perature Calibration Adjustments 11 Remove battery from unit under test U U T Refer to Battery Installatio...

Page 42: ...ings 10 Hit OPR key to store K meter zero adjustment in EEPROM Note that FUNC annuciator turns off 11 Select Type J thermocouple KJT key on CL23A SENSOR SELECT key on CL24 12 Turn off U U T 13 Replace...

Page 43: ...t P2 for a null meter reading of 0 3 V 35 Set both the U U T and T simulator to output 2400 F Type K Adjust P41 for a null meter reading of 0 3 V NOTE Steps 34 and 35 are interactive Repeat each as ne...

Page 44: ...e 50 Turn off U U T 51 Replace T calibration cable with E calibration cable 52 Turn on U U T Allow 2 3 minutes for thermal stabilization 53 Set both the U U T and thermocouple simulator to 32 0 F Type...

Page 45: ...otherwise shall not exceed the purchase price of the compo nent upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment so...

Page 46: ...s Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial pH Conductiv...

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