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Omega CL27 User's Manual

1. 7 Battery 9 Memory 10 Operation with Rechargeable 10 Operating Instructions 11 1 Diagnostics and Error 11 2 Initial Turn 11 3 Meter Mode Operation Thermocouple 13 4 Meter Mode Operation RTD Thermistor Ohms 14 5 Data Logging amp 15 6 Calibrator Mode Operation Thermocouples 17 7 Calibrator Mode Operation RTD Thermistor Ohms 18 8 Storage and Recall of Calibrator Settings 20 9 Step Function iioc eene teen tein 22 10 Ramp 22 Service 0400400 23 1 Calibration 23 2 Calibration 32 3 Mechanical Parts 38 Warranty 45 Limitation of Warranty 45 Statement of 45 GENERAL INFORMATION This manual provides operating instructions and maintenance information for five temperature instruments These instruments are high performance cali b
2. BOTTOM COVER 820 307 3 NYLON SCREW 4 40x5 16PPHBLK SCREWS 2 4 Bx5 8PPHST FEET 4 TC CONNECTORS 2 FE 13 CS 797 1 MACHINE SCREWS 4 2 56 1 4 STANDOFF ST 306 SOCKET 50 206 BATTERY CLIPS 865 306 1 POWER JACK 5 615 SHORTING PLUG 2 FLEX PC 5 791 850 114 RTD BOARD 850 201 855 201 5 C 376 2 GASKET LCD SUPPORT 30172 130 307 2 PAD ee Sas 30382 LCD DD 212 TOP COVER 820 305 1 OVERLAY NOT SHOWN 845 320 MEMBRANE KEYPAD NOT SHOWN B45 322 A 38 CALIBRATION PROCEDURES Test Equipment Required 1 Thermocouple simulator OMEGA CL25 or equivalent 2 Microvolt null meter Keithley 155 or equivalent 3 Calibration cover OMEGA 820 307 4 4 Calibration cables T C types K J T amp E as required per Figure1 below 5 Low thermal eg copper shorting link for null meter NOTE The 2 alloy copper junctions in the calibration cables can be either solder joints cleaned to remove flux or crimp con nections Insulate each junction with heat shrink tubing then wrap them close together in copper foil to ensure that they main tain identical temperatures ambient Ambient Conditions Units should be calibrated at an ambient temperature of 23 C 1 C with rel ative humidity less than 80 Test equipment and the unit under test U U T should have 1 hour to reach thermal equilibrium with ambient tem perature Ca
3. Clear 0 Sensor Select 1 F C 2 Resolution 3 Operate 4 Store 5 Recall 6 Calibrator Meter Up Ramp 7 Calibrator Step Down Ramp 8 Calibrator Ramp Meter Hold 9 DISPLAY 5 digit LCD 0 4 height and decimal point Annunciators Loaded Memory Locations 10 for data storage 4 for ramp parameters Low Battery BAT Number Change Mode NUM Calibrator Mode CALIB Meter Mode METER Operate Mode OPR Store Mode STO Recall Mode RCL Meter Hold HOLD Scale F C Sensor Type POWER OFF CONFIGURATION RETENTION Instrument retains last selected Sensor 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 Thermocouple RTD or Thermistor E 1 momentary Invalid Keypad Entry E 2 momentary Ramp Function Not Installed Temperature Reading or Keypad Entry Exceeds Rating LO Temperature Reading or Keypad Entry Too Low For Accuracy LCD Test During power up all segments and annunciators enabled momentarily ENVIRONMENTAL LIMITS FOR OPERATING 0 C to 50 C less than 90 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 to 60 C less than 95 relative humidity R H up to 35 C reduce R H limit by 3 C from 35 C to 60 C POWER 9
4. Adjust potentiometer P11 for a reading of 2500 0 F NOTE Adjustment steps 8 amp 9 are interactive Repeat these steps as necessary to get the desired readings Hit OPR key to store K meter zero adjustment in EEPROM Note that FUNC annuciator turns off Select Type J thermocouple key on CL23A SENSOR SELECT key on CL24 Turn off U U T Replace K calibration cable with J calibration cable Turn on U U T Note that FUNC annunciator is on again Allow 2 3 min utes for thermal restabilization Apply 32 F Type J Adjust P1 for a reading of 32 0 F exclusive of noise Hit OPR key to store J meter zero adjustment Select Type T thermocouple Turn off U U T Replace J calibration cable with T calibration cable Turn on U U T Allow 2 3 minutes for thermal stabilization Apply 32 F Type T Adjust P1 for a reading of 32 0 F exclusive of noise Hit OPR key to store T meter zero adjustment NOTE Steps 23 thru 28 apply to Model CL24 only For Model CL23A go to step 29 next 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Select Type E thermocouple Turn off U U T Replace T calibration cable with E calibration cable Turn on U U T Allow 2 3 minutes for thermal stabilization Apply 32 F Type E Adjust P1 for a reading of 32 0 F exclusive of noise Hit OPR key to store E meter zero adjustment Selec
5. User s Guide OMEGA http J We www Sian com e mail info omega com CL23A 24 25 26 27 Digital Calibrator Thermometer omega com OMEGAnet On Line Service Internet e mail http www omega com info omega com USA ISO 9001 Certified Canada Servicing North America One Omega Drive Box 4047 Stamford CT 06907 0047 Tel 203 359 1660 FAX 203 359 7700 e mail info omega com 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 Mexico and Latin America Benelux Czech Republic France Germany Austria United Kingdom ISO 9002 Certified 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 Tel 95 800 TC OMEGA FAX 95 203 359 7807 Espa ol 203 359 1660 ext 2203 e mail espanol omega com Servicing Europe 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 Ostravska 767 733 01 Karvina Tel 42 69 6311899 FAX 42 69 6311114 e mail czech omega com 9 rue Denis Papin 78190 Trappes Tel 33 130 621 400 FAX 33 130 699 120 Toll Free in France 0800 4 063
6. instrument To avoid electrical shock hazard disconnect 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 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 Keep inputs electrically isolated from outputs Do not con nect an external voltage source between the two connectors and avoid any external electrical pathways between input and output T2 amp T1 Failure to do so will disturb meter readings and calibrator output levels Damage to the instrument is also possible Where the meter and calibrator connectors are simultane ously wired into a system lacking the above isolation it is necessary to use an ungrounded 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 instructions before attempting to install or remove the battery Replacement batteries should also be alkaline types WARNING Turn the unit off and disconnect any input output connec tions 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 direct
7. the battery and recharger Turn off the instrument to recharge the battery Allow 7 hours to fully recharge the battery Then unplug the recharger to avoid overcharging 10 OPERATING INSTRUCTIONS 1 DIAGNOSTICS AND ERROR MESSAGES Unit self diagnostics provide fault condition readouts which are described below PROBLEM Blank display unit does not power up BAT Annunciator Display reads OPEN Display reads E1 momentarily Display reads E2 momentarily Display reads HI Display reads LO 2 INITIAL TURN ON LIKELY CAUSE 1 Improper battery installation Check battery polarity 2 Dead battery 1 Low battery voltage install a new battery If problem persists con sult factory 1 No thermocouple RTD or thermis tor is plugged into the meter input 1 This indicates that an invalid key pad entry has been made Review keystroke sequence or consult manual for input instructions 1 Attempt made to activate non installed ramp function NOTE RAMP Function enabled on Models CL25 and CL27 only 1 Meter mode A input temperature exceeds rating of selected sensor 2 Calibrator mode exceeds rating of sensor type 1 Meter mode input temperature too low for accurate measurement 2 Calibrator mode keypad entry too low for accurate simulation Turn on the instrument by depressing the ON OFF keyswitch once Figure 2 At power up the unit first performs a di
8. SENSOR SELECTION K J E N R S D K J N S L D Thermocouples RAMP FUNCTION Included BATTERY LIFE CONTINUOUS 16 hrs typical alkaline 4 hrs typical Ni Cd rechargeable MODEL CL26 SENSOR SELECTION K J T E Thermocouples 1000 Platinum RTD 22520 Thermistor 1 00002 100 000Q Resistance ACCURACY 18 C to 28 C ambient 2 years 0 5 F rdg gt 50 F 0 04 rdg rdg gt 1250 F 1 0 F rdg lt 50 F OHMS 0 04 range TEMPERATURE COEFFICIENT 18 C to 28 C included in accuracy specifications From 0 C to 18 C and 28 C to 50 C K J T E 0 006 rdg 0 03 C C RTD THERMISTOR OHMS 0 006 rdg 0 012 rng C RAMP FUNCTION Not Included MODEL CL27 CL27EC SENSOR SELECTION J N B R S G D K J N R S L D Thermocouples 1000 10000 Platinum RTD 1 0000 10 000Q Resistance RAMP FUNCTION Included FEATURES Combination calibrator thermometer and datalogger Function selection and numeric data entered via 12 keyswitch color coded keypad Keyswitches have tactile feedback 5 digit LCD includes annunciators for operating modes Up 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 calibrator outputs Step mode for quick sequential recall of
9. calibrator outputs from memory Manual automatic ramping for testing controller setpoints Conforms to ITS 90 thermocouple tables Dust proof splash proof drop proof construction Built in tilt stand hanger for bench use or hands free field measurements User friendly programming Retains data and programming even when turned off Performs diagnostic tests and indicates fault conditions Low battery and open sensor indications 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 eee o 6 UNPACKING YOUR UNIT Remove the Packing List and verify that you have received all equipment If you have any questions about the shipment please call the OMEGA Customer Service Department at 1 800 622 2378 or 203 359 1660 When you receive the shipment inspect the container and equipment for any signs of damage Note any evidence of rough handling in transit Immediately report any damage to the shipping agent NOTE The carrier will not honor any claims unless all shipping material is saved for their examination After examining and removing contents save packing material and carton in the event reshipment is necessary Make sure that you have the following items in the packing box e 1 CL20 Series Calibrator and Holster 1 Operator
10. cover Resistance function calibration is complete Table 3 Calibration of Meter Mode Resistance Functions RTD 100 1000 Sensor Unit Select Reading RTD 100 390 260 1562 0 F 0 5 F RTD 100 100 002 32 0 0 1 F RTD 100 18 490 328 0 0 2 F RTD 1000 3 902 60 1562 0 F 0 5 F RTD 1000 1000 00 32 0 0 1 F 1 0000 900 000 900 000 1 0000 1 000 1 00 0 100 10 0002 9 000 02 9000 00 10 0002 10 00 10 0 1 00 exclusive of noise adjust as necessary to obtain steps 2 5 30 Table 4 Calibration of Calibrator Mode Resistance Functions RTD 100 1000 Current Sensor Source DMM Select Input Reading RTD 100 1562 0 F 0 39026v RTD 100 32 0 F 0 10000 0 00003v RTD 100 328 09 0 01849 0 00006v RTD 1000 1562 0 F 0 39026v RTD 1000 32 0 F 0 10000 0 00003 1 0000 900 002 0 90000 0 00010v 1 0000 1 000 0 00100 40 0001 0 10 0000 9 000 00 0 90000 0 00010v 10 0000 10 00 0 00100 0 00010v exclusive of noise Table 5 Calibration of Meter Mode Resistance Functions RTD Thermistor Sensor Unit Select Reading RTD 100 390 260 1562 0 RTD 100 100 000 32 0 0 3 RTD 100 18 490 328 0 0 5 F 1 000Q 900 000 900 000 1 0000 1 000 1 00 0 200 100 000Q 90 0000 90 0000 100 000Q 100Q 100 20Q Thermistor 47 0Q 293 0 F Thermistor 22520 77 0 0 2 F Thermistor 75 7909 40 0 0 2 F 1 2 3 4 5 6 7 8 9 A exclusive of noi
11. ensure accurate calibrator outputs observe specified limits to excitation currents If in doubt check current levels with a DMM in series with either source lead 1 or 3 NOTE Due to limited display area 1000 and 10000 RTD s indicated on the display by a momentary readout of RTD 100 or RTD 1000 when first selected Thermistors are identified by a momentary alpha numeric readout of Y 400 signifying YSI Series 400 type thermistor Any of these readouts can be recalled by turning the unit off and back on 8 STORAGE AND RECALL OF CALIBRATOR SETTINGS While operating as a calibrator the unit can store and recall up to 10 output settings each with independent parameters eg F C sensor type and res olution in random access memory To Store Outputs 1 While in the CALIB OPR mode depress the STORE key Note that the OPR annunciator is replaced by STO 2 Next depress one of the memory location numbers keys 0 1 2 9 The corresponding memory annunciator turns on and the calibrator returns to the OPR mode eg STORE 2 NOTES The enabled memory annunciator shows that the output set up has been saved When set up is stored in a location already in use the new set up replaces the old Saved set ups are retained during power off To store a reading of 0 just hit the CLEAR while in the CALIB OPR mode Then depress STORE and a location number 20 To Recall Outputs 1 Whi
12. legibility constraints on the display preclude the use of dedicated annunciators for the less common tungsten rhenium thermocouple types G C amp D Instead these types are annunciated momentarily on the alpha numeric display when first selected Both T and R annunciators remain on to indicate a Tungsten Rhenium selection To recall the actual G C D selec tion turn the unit off then on again for another momentary read out 5 Select the desired temperature scale F C key 17 6 Select the resolution desired 0 1 1 key 7 The unit accepts numeric inputs by first changing the keypad to its num ber entry mode NUM by depressing the CHANGE ENTER key once The numeric display will flash the OPR annunciator will turn off and the NUM annunciator will turn on Key in desired temperature value most sig nificant digit first After the desired temperature value is keyed in hit For example to convert 77 to a Celsius reading go to the CALIB OPR NOTE With 1 resolution one less key stroke will be required to enter calibrator output temperatures via the keypad CHANGE ENTER to return to OPR mode To enter a value of 212 with 0 1 resolution the following keystrokes are used CHANGE ENTER 2 1 2 0 CHANGE ENTER NOTES Invalid numeric entries eg a temperature beyond the span of the selected TC type will cause a corresponding error code to be displayed To enter negative ie minus temperature
13. on the display The voltmeter should read 0 000 mV Press the OFF function button The unit will turn off Press the ON function button The unit will power up and return to the cali brator mode CALIB will appear on the display along with the K enuncia tor the OPR enunciator and 32 0 F will be displayed The blinking symbol will have completely disappeared indicating that you have exited the cop per mode Remove the Copper Mode Calibrator Verification Cable from both the voltmeter and the CL25 The copper mode verification is now complete Press the OFF function button to turn the unit off ALLOY MODE VERIFICATION PROCEDURE FOR THERMOCOUPLE FUNCTIONS Equipment Required 1 2 36 1 OMEGA Model to be verified 2 Precision temperature simulator voltage source 3 Voltmeter accurate to 1uV resolution 4 Cable assembly Start your calibration with a fresh battery Press the ON function button to turn the unit on 10 14 12 Select the calibrator mode CALIB on display by pressing the CALIB METER function button Select type K thermocouple on display by pressing the SENSOR SELECT function button until type K is reached Select the tenth degree display with a digit appearing after the decimal point on the display by pressing the 0 0 1 function button Select F F on display by pressing the F C function button Attach the Alloy Mode Calibrat
14. product and 3 Repair instructions and or specific 3 Repair instructions and or specific problems problems relative to the product relative to the product OMEGA 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 OMEGA is a registered trademark of OMEGA ENGINEERING INC 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 OMEGA ENGINEERING INC Where Do Find Everything Need for Process Measurement and Control OMEGA Of Course TEMPERATURE 4 Thermocouple RTD amp Thermistor Probes Connectors Panels amp Assemblies Wire Thermocouple RTD amp Thermistor Calibrators amp Ice Point References Recorders Controllers amp Process Monitors A Infrared Pyrometers PRESSURE STRAIN AND FORCE 4 Transducers amp Strain Gauges Load Cells amp Pressure Gauges 4 Displacement Transducers Instrumentation amp Accessories FLOW LEVEL 4 Rotameters Gas Mass Flowmeters amp Flow Computers Air Velocity Indicators 4 Turbine Paddlewheel Systems A Totalizers amp Batch Controllers pH CONDUCTIVITY 4 pH Electrodes Testers amp Accessories 4 Benchtop Laboratory Meters Controllers C
15. s Manual 1 NIST Certificate 1 Accessories Kit SAFETY INFORMATION SAFETY SYMBOLS AND TERMS The symbol on the instrument denotes that the user should refer to the operating instructions The WARNING used 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 person nel trained in the safe operation of electronic testing equip ment 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 temperature 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 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 electrical isolation of the case WARNING The battery is accessible through a cover on the back of the
16. x1yV 0 000 mV x1yV 0 000 mV 1 2 238 mV 1 0 000 mV x1yV 0 000 mV x1yV MICROVOLT UNIT UNDER TEST Figure 11 Calibration Setup Copper Mode UNIT UNDER TEST Figure 12 Calibration Setup Meter Mode MICROVOLT us UNIT UNDER TEST Figure 13 Calibration Setup Calibrator Mode 27 RESISTANCE CALIBRATION NOTE Thermocouple and resistance calibrations are indepen dent However potentiometer P1 is used in both thermocouple and resistance calibrations to set EEPROM constants Follow cal ibration procedures carefully to ensure that thermocouple and resistance calibrations do not disturb one another Test Equipment Required il Resistance Decades General Resistance RTD 100 RTD 500 1000 and RDS 54 or equivalent 2 Current Source Fluke 5101B or equivalent Digital Multimeter OMEGA OM7551 or equivalent Calibration cables per Figure 14 Ambient Conditions Unit should be calibrated at an ambient temperature of 23 C 1 C with rela tive humidity less than 80 Preparation For Calibration 1 2 28 Turn off unit and remove bottom cover Refer to Disassembly Instructions Secure battery with a piece of adhesive tape NOTE Momentary loss of battery power during
17. 1 7 F RTD 0 2 F rdg gt 50 F 0 5 F rdg lt 50 F 0 2 F 0 04 rdg meter mode THERMISTOR 0 5F OHMS 0 02 range Exclusive of sensor errors and lead resistance induced errors RESOLUTION TEMPERATURE 0 1 1 F C OHMS 0 010 0 10 10 REPEATABILITY 1 week at constant ambient temperature J T E 0 2 F typ S C D 1 0 F typ RTD THERMISTOR 0 1 F typ OHMS 0 01 rng typ TEMPERATURE COEFFICIENT From 18 C to 28 C included in accuracy specifications From 0 C to 18 C 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 reading second typ METER MODE EXCITATION CURRENTS 100Q RTD lt 2mA 1000QRTD lt 200 999 990 lt 2 9999 90 lt 200 999990 lt 50pA THERMISTOR T lt 113 F lt 50 T gt 113 F lt 2mA CALIBRATOR MODE OUTPUT LOAD THERMOCOUPLES 5000 min CALIBRATOR MODE EXCITATION CURRENTS 1000 RTD 0 5 1mA 0 1 2mA typ 10000 RTD 50 100pA 10 200pA typ 999 990 Same as 1000 RTD 9999 90 Same as 10000 RTD 999990 10 20 1 20pA typ THERMISTOR T lt 113 F 10 200A T 113 F 0 5 1mA MAXIMUM COMMON MODE VOLTAGE 42V peak to earth KEYPAD 12 momentary switches with tactile feedback select On Off Change Enter
18. 42 e mail france omega com 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 omega com 25 Swannington Road P O Box 7 Omega Drive 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 Common Specifications essen 2 Unique 5 6 Manual Addenda 6 Unpacking Your 7 Safety Information 7 Safety Precautions
19. R 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 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 lowing information available BEFORE OMEGA for current repair charges Have the fol contacting OMEGA lowing 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
20. alibrators Simulators amp Pumps Industrial pH amp Conductivity Equipment DATA ACQUISITION 4 Data Acquisition amp Engineering Software 4 Communications Based Acquisition Systems Plug in Cards for Apple IBM amp Compatibles Datalogging Systems 4 Recorders Printers amp Plotters HEATERS Heating Cable Cartridge amp Strip Heaters Immersion amp Band Heaters Flexible Heaters Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL 4 Metering Control Instrumentation Refractometers 4 Pumps Tubing Air Soil amp Water Monitors Industrial Water amp Wastewater Treatment pH Conductivity Dissolved Oxygen Instruments M1554 499
21. ator for this location turns on and the memory con tents are displayed 3 Several stored readings can be randomly recalled by a key sequence such as T1 T2 Calibrator Thermometer output input o o oo Figure 7 16 eg RECALL 3 RECALL 5 RECALL 2 etc 4 To return the meter to the operate mode depress OPR after recalling the last reading All active location annunciators will turn on again together with the OPR annunciator NOTE Recalling data from unused ie empty locations will give a zero reading To Erase Data Locations Meter Mode 1 Individual data locations can be erased by recalling the location to be cleared followed by a CLEAR key input Note that the annunciator for the cleared location is turned off and the meter returns to OPR eg RECALL 3 CLEAR NOTES There is no need to clear a location if new data is ready for saving in this location Just STORE the new data It will write over and delete the old 6 CALIBRATOR 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 Replacement instructions 3 When operating as a calibrator the display indicates CALIB Should the instrument be in the METER mode hit the CALIB key to change to the cal ibrator function 4 Select the thermocouple type that will be used NOTE Space and
22. bra tion is intended 23 10 11 24 NOTE For calibrators with the older single jumper configura tion refer to calibration procedure beginning on page 39 Install calibration cover in place of bottom cover Re install battery Hook up test equipment calibration cables and U U T per Figure 10 Turn on DMM and TC simulator for warmup Allow at least 30 minutes Set the DMM to 200mV DC range Set the TC simulator to its COPPER output mode with a reference tem perature of 32 0 F Turn on U U T and verify that RTD and Q annunciators are flashing on the display This verifies removal of J1 and J2 respectively NOTE Flashing RTD indicates that zero offset corrections can be stored 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 Clear the EEPROM locations used to store E1 meter cold junction sen sor error and E2 calibrator cold junction sensor error as follows a Set U U T to CALIB OPR K F mode b Key in CHANGE 0 0 ENTER STO 1 OPR E1 is set to 0 0 F c Key in CHANGE 0 0 ENTER STO 2 OPR E2 is set to 0 0 F NOTE Both 1 amp 2 memory annunciators should be turned on but the RTD annunciator will have turned off d Perform RECALL 1 and RECALL 2 to verify storage of 0 0 F in both locations NOTE At the completion of calibrat
23. calibration cable Turn on U U T Allow 2 3 minutes for thermal stabilization Set both the U U T and thermocouple simulator to 32 0 Type E Adjust P1 for null meter reading of 3 Hit OPR Key to store E calib zero adjustment Turn off U U T Remove calibration cover Be careful not to disturb battery connections Re install J1 jumper Re install original back cover Calibration is complete WARRANTY DISCLAIMER 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 If 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 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 da
24. cated on the display by a momentary readout of RTD 100 or RTD 1000 when first selected Thermistors are identified by a momentary alpha numeric readout of Y 400 signifying YSI Series 400 type thermistor Any of these readouts can be recalled by turning the unit off and back on 5 DATA LOGGING AND RECALL Operating as a meter the unit can save and recall up to 10 readings each with independent parameters eg F C TC type and resolution in random access memory 15 To Save Readings 1 While in the METER OPR mode depress the STORE key Note that the OPR annunciator is replaced by STO 2 Next depress one of the memory location numbers keys 0 1 9 The corresponding memory annunciator turns on and the meter returns momentarily to the OPR mode displaying thermocouple temperature eg STORE 7 NOTES The enabled location annunciator indicates that the meter read ing at the instant that the location number key was hit was stored in 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 stored earlier can be displayed by first depressing the RECALL key Note that the OPR annunciator is replaced by RCL and all memory location annunciators are blanked 2 Next depress the keypad number corresponding to the desired location Note that the annunci
25. e E2 as follows E2 DMM Reading in p V 22 For example with DMM reading of 4 E2 0 5 F Store E2 CHANGE E2 value ENTER STO 2 OPR Install J2 jumper Re set U U T output to 32 F DMM reading should 2 Turn OFF U U T Thermocouple calibration is complete Remove calibration cover Re install original back cover unless going on to Part B Resistance Calibration 25 Table 1 Meter Mode Zero amp Gain Adjustments Sensor Select 0 000 mV 54 856 mV 1 11 Reading 32 0 0 1 F 2500 0 0 1 F Repeat Steps 1 amp 2 As Required OoOoOoogJuzmJAc exclusive of noise 0 000 mV 0 000 mV 0 000 mV 0 000 mV 1 439 mV 0 000 mV 0 000 mV 2 238 mV 0 000 mV 0 000 mV P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 on EC models G replaced by L Calibrate L per J Table 2 Calibrator Mode Zero amp Gain Adjustments Sensor Select 32 0 F 2500 0 F P1 41 1000 0 0 5 F 32 0 0 5 F 32 0 0 5 F 600 0 0 2 F 32 0 0 2 F 32 0 0 2 F DMM Reading 0 000 mV x1yV 54 856 mV 1pV R epeat Steps 1 amp 2 As Required OoococomigJuzmM4Ac exclusive of noise on EC models G replaced by L Calibrate L per J 26 32 0 F 32 0 F 32 0 F 32 0 F 1000 0 F 32 0 F 32 0 F 600 0 F 32 0 F 32 0 F P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 0 000 mV x1yV 0 000 mV x1yV 0 000 mV x1yV 0 000 mV x1yV 1 439 mV
26. he dis play and both the T and R will appear along the top row of the display Press the CHANGE function button The 32 0 F display will blink and will appear on the display Press 6 0 0 0 buttons and then press ENTER function button NUM will dis appear and 600 0 F will appear not blinking The voltmeter should read 2 238 mV 35 32 33 34 35 36 37 38 39 40 Press the SENSOR SELECT function button The sensor type will change to type C A will appear momentarily in the center of the display 600 0 will then appear in the center of the display and both the and R will appear along the top row of the display Press the CHANGE function button The 600 0 F display will blink and NUM will appear the display Press 3 2 0 buttons and then press ENTER function button NUM will dis appear and 32 0 F will appear not blinking The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type D A will appear momentarily in the center of the display 32 0 will then appear in the center of the display and both the T and will appear along the top row of the display The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type K The T and the will disappear from the display and a K will appear
27. hmmeter refer to the Meter Mode Operation section for detailed instructions For use as a tem perature calibrator or ohms simulator refer to Calibrator Mode Operation 3 METER MODE OPERATION Thermocouples Set Up 1 Turn on instrument by depressing the ON OFF key 2 Check that the BAT annunciator turns off following the power up LCD test If it does not turn off less than 1096 of battery remains Refer to Battery Installation Replacement instructions 3 If the meter is already in the METER mode the METER annunciator will be on Otherwise the calibrator mode is enabled and the CALIB annunci ator is on Depress the METER key to return to meter mode 4 Connect an input thermocouple TC to connector T2 Select the appro priate TC Type with the select key A display annunciator will indicate the selected TC type NOTE Space and legibility constraints on the display preclude the use of dedicated annunciators for the less common tungsten rhenium thermocouple types G C amp D Instead these types are annunciated momentarily on the alpha numeric display when first selected Both T and R annunciators remain on to indicate a Tungsten Rhenium selection To recall the actual G C D selec tion turn the unit off then on again for another momentary read out 5 Select temperature scale with F C key The corresponding annunciator is enabled 13 6 Select display resolution with 0 1 1 key NOTE Set up is retained dur
28. ing power off Hold Meter readings can be put on hold at any time by depressing the HOLD key At this time the HOLD annunciator turns on the 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 amp Ohms Set Up 1 Connect a sensor or unknown resistance to the instrument as shown in Figures 4 5 or 6 The 2 wire configuration is simplest but includes lead wire resistance in the measurement 2 wire measurements are generally limited to high resistance sensors e g 1000 ohm RTDs 2252 ohm thermistors RTD Thermistor elc Figure 5 3 Wire Resistance Measurement 14 Figure 6 4 Wire Resistance Measurement Lead resistance errors are compensated for in 3 wire configurations However full compensation requires equal resistance in each lead This configuration is common with 100 ohm RTDs In 4 wire configurations accuracy is unaffected by lead resistance and resistance differences between leads NOTE These instruments measure input voltages on all 4 termi nals and are able to distinguish between 2 4 and 3 wire hookups Switching between these measurement modes is automatic Set instrument to METER mode Use the sensor select key to set the instrument to the appropriate func tion and range NOTE Due to limited display area 100Q and 1000Q RTD s are indi
29. ion E1 and E2 will be saved in EEPROM Memory locations 1 and 2 will be free for normal use e Set U U T to METER OPR K F f Turn U U T OFF then ON to re enable and Q annunciators Calibration Adjustments ak won 16 17 18 19 20 21 22 NOTE deviate from the calibration adjustment sequence that follows This will ensure that adjustments to be stored in EEPROM go to the correct locations Set meter mode zero and gain adjustments per Table 1 Hit OPR key RTD annunciator turns off Set U U T to CALIB OPR K F Turn U U T OFF then ON to re enable amp annunciators Set calibrator mode zero and gain adjustments per Table 2 Hit CHANGE and ENTER at the completion of each step in Table 2 Hit OPR key RTD annunciator turns off Install J1 jumper Set U U T to METER OPR T F Change TC simulator output to Type T 32 F ALLOY mode Reconfigure calibration set up per Figure 12 Allow 2 3 minutes for ther mal stabilization Calculate E1 as follows E1 U U T Reading 32 0 12 13 14 15 Set U U T to CALIB OPR T F mode Store E1 CHANGE E1 value ENTER STO 1 OPR Go to METER mode and verify U U T reading of 32 0 0 1 F Reconfigure calibration setup per Figure 12 Leave simulator output at 32 F Type T ALLOY mode Allow 2 3 minutes for thermal stabilization Set U U T to CALIB mode 32 Type T Calculat
30. ion of the arrow located on the battery cover Figure 1 Battery Installation 2 Remove the old battery by lifting the battery extractor loop 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 NOTES Less than 10 of battery life remains when the BAT annuncia tor turns on When the battery is excessively discharged the display is blanked If the instrument is going to be stored for a long period of time or in a high temperature environment remove the battery to prevent leakage damage After a new battery is installed allow approximately 5 sec onds for display turn on the first time the unit is turned on During this period microcomputer initialization is 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 turn off the instrument and connect an HH22 AC battery charger Then exchange batteries and disconnect the battery charger Do not leave the bat tery charger connected to instruments with non rechargeable batteries OPERATION WITH RECHARGEABLE BATTERY HH22 AC provides a 9 volt Ni Cd battery and recharger suitable for use with the unit This battery provides 3 4 hours of continuous operation This dura tion can be extended to several days by operating simultaneously from both
31. le the CALIB mode set ups saved earlier in memory can be recalled to program the calibrator output First depress the RECALL key to recall a set up Note that the RCL annunciator turns on OPR turns off and all memory locations annunciators are blanked Next hit the key with the number corresponding to the desired memory location The corresponding annunciator turns on and the LCD updates to show the new calibrator setting eg RECALL 8 Several stored set ups can be randomly recalled by a key sequence such as eg RECALL 6 RECALL 3 RECALL 9 etc 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 unused locations will display and output 02 Calibrator set ups can be recalled even when the unit is func tioning in the meter mode The same 10 storage locations are shared in both meter and calibrator modes Readings stored in memory while operating as a METER can be recalled in the CALIB mode In this unusual application the unit generates calibrator outputs that simulate earlier stored meter inputs To Erase Set Up Locations Calibrator Mode 1 Individual set up locations can be erased by recalling the location followed by a hit to the CLEAR key eg RECALL 5 CLEAR 21 9 STEP FUNCTION When operating in the CALIBRATOR mode the STEP key will seq
32. libration Adjustments 1 Remove battery from unit under test U U T Refer to Battery Installation Replacement instructions in the manual 2 Remove bottom cover from U U T Refer to Disassembly Instructions 3 Remove calibration jumper J1 from printed circuit board NOTE When installed J1 protects the contents of EEPROM locations where zero offset adjustments are stored Once J1 is removed this data is erased when the U U T is turned on 4 Install calibration cover in place of bottom cover Re install battery Connect U U T to test equipment per Figure 2 using the K type calibra tion cable Turn on U U T and allow 2 3 minutes for thermal re stabilization of the TC mini plug and input jack NOTE U U T will be in the Type K meter mode The FUNC annunciator is on indicating that new constants will be stored in EEPROM 39 10 14 12 13 14 15 16 17 18 19 20 21 22 40 With J1 removed the digital filters in the U U T are dis abled This is to speed up U U T response to calibra tion adjustments In this mode 0 1 F of reading noise is normal Do not deviate from the calibration adjustment sequence that follows This will ensure that zero adjust ments for each TC type will be stored in the appropriate memory locations Apply 32 F Type K to U U T Adjust potentiometer P1 for a reading of 32 0 F exclusive of noise Apply 2500 F Type K to U U T
33. maged 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 information 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 MER CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED LIMI TATION 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 compo nent upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CF
34. n NUM will disappear and 32 0 F will appear not blinking The voltmeter should read 0 000 mV Press the CHANGE function button The 32 0 F display will blink and NUM will appear on the display Press 2 5 0 0 0 buttons and then press ENTER function button NUM will disappear and 2500 0 F will appear not blinking The voltmeter should read 54 845 mV Press the CHANGE function button The 2500 0 F display will blink and NUM will appear on the display Press 3 2 0 buttons and then press the ENTER function button NUM will disappear and 32 0 F will appear not blinking The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type J The K will disappear from the display and a will appear on the display The voltmeter should read 0 000 mV 19 20 21 22 23 24 25 26 27 28 29 30 31 Press the SENSOR SELECT function button sensor type will change to type T The J will disappear from the display and a T will appear on the display The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type E The will disappear from the display and an E will appear on the display The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type N The will disappear f
35. nt 500 F 3 High Limit 550 F 4 Low Limit 450 F 22 SERVICE INFORMATION WARNING All service information is intended for qualified electronic mainte nance personnel only 1 CALIBRATION PROCEDURES This is a two part procedure Products with thermocouple functions only fol low the Thermocouple Calibration procedure below Products with resistance functions RTD thermistor ohms follow first the Thermocouple Calibration procedure then the Resistance Calibration procedure A THERMOCOUPLE CALIBRATION Test Equipment Required 1 Thermocouple simulator OMEGA CL521 or equivalent calibrated to ITS 90 2 Microvolt DMM OMEGA 7551 or equivalent 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 4 Calibration cover OMEGA 820 307 4 Ambient Conditions Units should be calibrated at an ambient temperature of 23 C 1 C with rel ative humidity less than 80 Preparation for Calibration 1 Remove battery from unit under test U U T Refer to Battery Installation Replacement section in the manual 2 Remove bottom cover from U U T Refer to Disassembly Instructions 3 Remove calibration jumpers J1 and J2 from printed circuit board NOTE Removal of J1 J2 causes partial loss of previously stored calibration data Do not remove these jumpers unless recali
36. or Verification Cables per Fig 12 amp 13 If you are using a Type K Thermocouple Temperature Simulator ITS 90 you will use the regular set up If you are using a Precision Voltage Source use the alternate set up When performing the following proce dure using a Precision Voltage Source with the alternate set up 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 1 5 ITS 90 Thermocouple Reference Table Example 32 0 F would equal 0 000 mV Press the CHANGE function button and the numerical display will blink and NUM will appear on the display Press 3 2 0 buttons and then press the ENTER function button NUM will disappear and 32 0 F will appear not blinking Adjust the Thermocouple Temperature Simulator to 32 0 F Note The reading on the voltmeter should read null 0 000 mV Adjusting the CL25 to any temperature and adjusting the Temperature Simulator to the same temperature should result in a null or 0 000 mV on the volt meter Remove the Alloy Mode Calibrator Verification Cable from all equipment The Alloy Mode verification is now complete Press the OFF function but ton to turn the unit off 37 4 MECHANICAL PARTS DIAGRAM TILT BAIL WRIST BAND 820 309 BATTERY COVER 820 321 BATTERY FOAM NOT SHOWN 3 1 3 4 INCH SELF THREADING
37. pe thermocouple K on display by pressing the SENSOR SELECT function button until type K is reached Select the tenth degree display with a digit appearing after the decimal point on the display by pressing the 0 0 1 function button Select F F on display by pressing the F C function button Press the CHANGE function button The numerical display should blink Press 9 9 9 9 9 9999 9 should appear blinking on display Press the ENTER function button The display will blink once or twice and then will display 0 0 F blinking There will also be an Q symbol blinking in the upper left It will blink with the 0 0 display Press the ENTER function button The 0 0 F display will stop blinking and the will continue to blink You are now in the copper mode If or when you turn off the power or remove the battery the unit will no longer be in the copper mode and you would have to repeat the above steps to return to the copper mode As long as you see the O blinking you are in the copper mode 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 a precision voltmeter Press the CHANGE function button The 0 0 F display will blink and NUM will appear on the display Press 3 2 0 buttons and then press the ENTER function butto
38. rator thermometers capable of simulating and measuring a wide variety of sensors In addition features such as data storage and ramping further enhance their versatility It is recommended that you read this manual thoroughly especially the sec tions on safety prior to operating these instruments COMMON SPECIFICATIONS THERMOMETER INPUTS THERMOCOUPLE Miniature TC jack RTD OHMS THERMISTOR T series instrumentation connector CALIBRATOR OUTPUTS THERMOCOUPLE Miniature TC jack RTD OHMS THERMISTOR T series instrumentation connector THERMOCOUPLE TYPES J S G D RTD TYPES 1000 platinum 0 00385 1000Q platinum 0 00385 THERMISTOR TYPE 22520 YSI Series 400 RANGES 200 C to 1372 C 328 F to 2502 F J 210 C to 760 C 346 F to 1400 F T 200 C to 400 C 328 F to 752 F E 230 to 1000 C 382 F to 1832 F 200 to 1300 C 328 F to 2372 F B 500 C to 1820 C 932 F to 3308 R 0 C to 1768 C 32 F to 3214 F S 0 C to 1768 C 32 F to 3214 F G 300 C to 2316 C 572 F to 4201 F C 0 C to 2316 C 32 F to 4201 F D 0 C to 2316 C 32 F to 4201 F RTD 200 C to 850 C 328 F to 1562 F THERMISTOR 40 to 150 C 40 F to 302 F OHMS 0 999 990 0 9 999 90 0 99 9990 ACCURACY 18 to 28 C ambient 2 years J T E 0 5 F rdg gt 50 1 0 F rdg lt 50 R S G D
39. rom the display and a will appear on the display The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type The will disappear from the display and a will appear on the display LO will also appear on the display Press the CHANGE function button The 32 0 F display will blink and NUM will appear the display Press 1 0 0 0 0 buttons and then press ENTER function button NUM will disappear and 1000 0 F will appear not blinking The voltmeter should read 1 438 mV Press the SENSOR SELECT function button The sensor type will change to type The will disappear from the display and a will appear on the display Press the CHANGE function button The 1000 0 F display will blink and NUM will appear on the display Press 3 2 0 buttons and then press ENTER function button NUM will disappear and 32 0 F will appear not blinking The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type S The will disappear from the display and a S will appear on the display The voltmeter should read 0 000 mV Press the SENSOR SELECT function button The sensor type will change to type G The will disappear from the display and will appear momen tarily in the center of the display LO will then appear in the center of t
40. s hit the 0 key first when in the NUM mode The first hit on this key enters the neg ative sign Subsequent hits enter zeros To correct a numeric entry while in the NUM mode hit the CHANGE ENTER key twice This will return number entry to the beginning of a new number To return the calibrator output to 0 while in the OPR mode hit the CLEAR key The unit can be used as a convenient F to C or to F cal culator mode enter the reading to be converted and change scale eg F CHANGE ENTER 77 CHANGE ENTER C Display reads 25 C 7 CALIBRATOR MODE OPERATION RTD Thermistor amp Ohms Set Up 1 Connect measurement equipment under test eg RTD thermometer 18 ohmmeter etc to the instrument as shown in Figures 8 9 or 10 mA current source MEASUREMENT EQUIPMENT UNDER TEST Calibrator out Thermometer in l out V out Figure 8 2 Wire Resistance Simulation SOURCE SENSE SENSE SOURCE NOTE Colors indicated apply to Model 84937 Calibration Cable Figure 10 4 Wire Resistance Simulation 19 The same performance tradeoffs apply to 2 3 and 4 wire simulations as to 2 3 and 4 wire measurements Refer to RTD Thermistor and Ohms Meter Mode section above for wiring guidelines 2 Set instrument to CALIBRATOR mode 3 Use the sensor select key to set the instrument to the appropriate func tion and range NOTE To
41. se 31 Table 6 Calibration of Calibrator Mode Resistance Functions RTD Thermistor Current Sensor Source DMM Select Input Reading RTD 100 1562 0 F 0 39026v RTD 100 32 0 F 0 10000 0 00006v RTD 100 328 0 F 0 01849 0 00012v 1 000Q 900 000 0 90000 0 00020v 1 0000 1 000 0 00100 0 00020v 100 000Q 90 0000 0 90000 100 0000 1000 0 00100 0 00020v Thermistor 293 0 F 0 04700 0 00020v Thermistor 77 0 F 0 02252 0 00020v Thermistor 40 0 F 0 75790 0 00500v exclusive of noise 2 CALIBRATION VERIFICATION Calibration is verified with the same instrument hookups as used for calibra tion ie Figures 12 and 13 for thermocouple functions Figure 14 for resis tance functions While one hookup serves to verify all resistance functions RTD thermistor ohms a full check out of thermocouple functions requires a set of calibration cables for each thermocouple type To simplify the verification of thermocouple calibration software has been enhanced to reactivate the copper mode used during calibration This feature is available on products that use the following and later software revisions 32 Model Software Revision CL23A 6 7 CL24 7 7 CL25 3 7 CL26 5 6 CL27 4 16 Software revision is marked on a label attached to integrated circuit U1 on the mother board is a non compensated mode of operation during which cold junction compensation of inpu
42. splay test All segments and annunciators of the liquid crystal LCD are momentarily turned on for visual confirmation by the user Figure 3 NOTE In case of missing or poor contrast segments contact factory 11 NUMBER cear SENSOR SELECT 0 0 1 3 ee OPERATION 5 6 MODE Gene STEP RAMP HOLD 9 CALIB OUTPUT CONN 11 METER INPUT CONN 2 MADE IN THE USA ANA2V MAX Figure 2 Keypad 116 K EI FA BAT El EI NUM D CALIB 8 METER OPRSTORCLHOLD C F Figure 3 Display Test If the unit is turning on for the first time after a new battery 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 annunciators are enabled 12 METER unit functioning as a thermometer K K type thermocouple Fahrenheit readings Instrument is operational If no input thermocouple is connected to the unit at this time the numeric segments will indicate OPEN Plugging a thermocouple into the meter jack connector T2 on the top right side will give actual thermocouple temperature readings NOTE To obtain full accuracy allow 1 2 minutes after connect ing a thermocouple plug for thermal setting If the instrument is to be used as a thermometer or o
43. t Type K thermocouple Select CALIB mode Turn off U U T Connect U U T to test equipment per Figure 3 using the K calibration cable Turn on U U T and allow 2 3 minutes for thermal stabilization Set both the U U T and TC simulator to output 32 0 F Type K Adjust P2 for a null meter reading of 0 3yV Set both the U U T and T simulator to output 2400 F Type K Adjust P41 for a null meter reading of 0 3yV NOTE Steps 34 and 35 are interactive Repeat each as neces sary to get the desired null readings Hit OPR key to store K calib zero adjustment Select J thermocouple Turn off U U T Replace K calibration cable with J calibration cable Turn on U U T Allow 2 3 minutes for thermal stabilization Set both the U U T and TC simulator to output 32 0 F Type J Adjust P1 for a null meter reading of 0 3yV Hit OPR Key to store J calib zero adjustment Select Type T thermocouple Turn off U U T Replace J calibration cable with T calibration cable Turn on U U T Allow 2 3 minutes for thermal stabilization 41 47 48 49 50 51 52 53 54 55 56 57 58 42 Set both the U U T and TC simulator to output 32 0 F Type T Adjust P1 for a null meter reading of 0 3yV Hit OPR key to store T calib zero adjustment NOTE Steps 49 thru 54 apply to Model CL24 only For Model CL23A go next to step 55 Select Type E thermocouple Turn off U U T Replace T calibration cable with E
44. the following cal ibration will invalidate previous adjustments both resistance and thermocouple Hook up test equipment and unit per Figure 14 Set current source to 1 STANDBY mode Set DMM to 2V DC range Turn on unit Set unit to METER mode RTD 100 F Turn off unit Remove jumper J1 Turn on unit annunciator should be flashing NOTES Flashing RTD indicates that calibration adjustments will be written to memory Avoid selecting thermocouple functions while in this mode Should it be necessary to scroll through thermocouple functions first hit the key disables flashing RTD and start again at Step 7 above DIGITAL VOLTMETER 200009 CURRENT SOURCE Figure 14 Resistance Calibration Setup UNIT UNDER TEST 29 Calibration 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 Perform meter mode adjustments and verifications per Table 3 use Table 5 for RTD Thermistor models Hit OPR key Flashing RTD annunciator turns off Install J1 jumper Set unit to CALIB mode RTD 100 F Switch current source to OPERATE mode Perform calibrator mode adjustments and verifications per Table 4 use Table 6 for RTD Thermistor models Turn off unit Remove tape holding battery N Re install back
45. ts and outputs is disabled This permits the use of copper wire interconnections between instruments while avoid ing the time and expense of multiple thermocouple cable hookups At the conclusion of calibration verification cold junction compensation is re enabled and operation returns to alloy mode Alloy mode refers to Thermocouple operations for example a Type K thermocouple is made up of Nickel Chromium and Nickel 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 eliminate erroneous voltage signals In Alloy mode the OMEGA calibrator automatically calculates the cold junction compensation for the selected TC type based on the value s from the ITS 90 table This feature enables the user to make accurate tem perature measurements without making manual calculations for error cor rections COPPER MODE VERIFICATION PROCEDURE FOR THERMOCOUPLE FUNCTIONS Equipment Required 1 OMEGA Model to be verified 2 Voltmeter accurate to 1uV resolution 3 Cable assembly Fig 11 1 Start your calibration with a fresh battery 2 Press the ON function button to turn the unit on 3 Select the calibrator mode CALIB on display by pressing the CALIB METER function button 33 ON 10 11 12 13 14 15 16 17 18 34 Select ty
46. uentially recall data stored in memory up to 10 steps At each step the calibrator will display and output these parameters The STEP function is non functional in METER mode 10 RAMP FUNCTION CL25 and CL27 This feature available only on Models CL25 and CL27 allows the calibrator to automatically ramp up and down a user defined staircase Up and down keys allow for manual ramping by the user To activate the RAMP function the instrument must first be in the CALI BRATE mode Depress the RAMP key once to enter the ramp programming mode The display reads prog with memory annunciators 1 4 flashing 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 amp 4 are dedicated to storage of RAMP parameters step size staircase starting point upper limit and lower limit respectively These memory locations are accessible only when in RAMP prog mode and are independent of the other 10 memory locations Numeric values for RAMP parameters can be set stored recalled and cleared like other calibrator settings Refer page 17 CALIBRATOR MODE OPERATION When automatic ramping is in progress a hit to either the 7 or 8 key activates manual up ramping or down ramping respectively Whenever the battery is replaced and memory backup is not performed the ramp parameters default to factory set values LOC 1 Step Size 10 F 2 Start Poi
47. volt alkaline battery NEDA 1604 BATTERY LIFE CONTINUOUS 10 hrs typical alkaline 3 hrs typical Ni Cd rechargeable BATTERY INDICATOR Display indicates BAT when less than 10 of life remains DIMENSIONS WEIGHT 7 0 x 2 9 x 1 1 Net weight 12 oz UNIQUE SPECIFICATIONS NOTE The specifications below are specific to the model s as identified by model number The difference specifications are in addition to the OVERALL SERIES SPEC IFICATIONS found on pages 2 5 MODEL CL23A CL23EC SENSOR SELECTION K J T K J T L Thermocouples ACCURACY 18 to 28 C ambient 2 years 0 5 F rdg gt 50 F 0 04 rdg rdg gt 1250 F 1 0 F rdg lt 50 F TEMPERATURE COEFFICIENT 18 C to 28 C included in accuracy specifications From 0 C 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 Thermocouples ACCURACY 18 to 28 C ambient 2 years 0 5 F rdg gt 50 F 0 04 rdg rdg gt 1250 F 1 0 F rdg lt 509 TEMPERATURE COEFFICIENT 18 C to 28 C included in accuracy specifications From 0 C 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 CL25 CL25EC

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