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IM 12D7B5(03)-E-E.indd

1. 34 6 1 E glee MEO NET 34 6 2 Gell constant Mantal sen ske EE RD EE OE adu tesa suc ee rebus atu bags 34 6 3 Cell constan adtormidli aie ee ee hal teda pet babct qu dnd m Rind o tM ias 34 6 4 Alr zer Geleer EE ee OR m LT 34 6 5 Slade skeer oe AO EE OE essem pdt ten tote N N 34 6 6 Temperature coefficient calibration ee EE Ee AE EE ee RE ee ee EE ee ee 34 6 7 Temperature calibration see De EDE ee ee Pe ie NEEE 34 6 8 General comments on SC calibration ee ee ee RR Re ee 35 7 MAINTENANCE oes oen ese oe ees eo ig ie ke Ee ee ie ee tarn ie be Ee ua 36 f 1 Penodi Te EE oe n in Ad GE dd ee UT 36 1 2 Periodic maintenance for the sensor ee ee RR mH 36 7 3 Cleaning methods PTT OO OE OE N 36 8 TROUBLESHOOTING tritus eds ie se Ee de ese ee de Og N ee ant 37 8 1 Eier ri E E At deu dac Ut o Ge pd MU EUM AM dur NECEM LU af 8 2 ee eie oe RN ETT af 8 3 mio fracti ep CHECK ETT 37 8 4 Predictive maintenanGe iste bos v anera ie DE aai of 8 5 Prediction of cleaning needed ee ee ee Ee ee GE ee GE ee Ee of 8 6 Poor calibration TechHhible ss ed rb n GE aaa 37 8 7 Eror di Se and SEG NEU df 9 QUALITY INSPECTION 25 eens bt esse sg Se ee Re x etur Ern RE ee rad aci udis 38 10 SPARE PARE oorsese se Re EE FOU be ee ge utn DU ie eg ee ae De NE 41 11 SOFTWARE HISTORY ee se see se ee ee ee ee ee ee ee nnne nnns an nnn nnns 42 APPENDICES m
2. bracket as shown in figure 3 4 on page 6 IM 12D7B5 E E a JONVN JLNIYN ONLLOOHSH 18NOHL e 38 9 QUALITY INSPECTION STANDARD QIS Before shipping any instrument Yokogawa submits all their instruments to a series of functional tests The results of these tests are printed on a standard Quality Information 1 Instrument description Certificate form and are shipped with the instrument This chapter provides additional information what tests are performed and how to interpret the results Each instrument is uniquely defined by the Serial Number The SN is shown on the fourth zoom screen of the transmitter Press the magnifying glass on the main display and next until the serial number appears Sequence number Automated Test Equipment number 1 3 Date 2002 P 2003 R 2004 S 2005 T 2006 U 2007 V 2008 W 2009 X 2010 A 2011 B 2012 C 2015 D January 1 February 2 March d April 4 May 5 June 6 July T August 8 September 9 October A November B December C Tag This TAG should be unique throughout the plant and correspond to the TAG on top of the transmitter The TAG is pre defined by the user 2 Safety tests This instruments is designed according the IEC 61010C 1 the safety requirements for electrical equipment for measurement control To ensure that the design and methods of construction used provide adequate protection for the operator ag
3. 43 Appendix 1 Temperature Compensation ee n 43 Appendix MERE eR ERE EET AT Appendix 3 Calibration solutions for conductivity ee ee Ee ee ee 48 Appendix 4 Sensor selection Ee ee ee ee nnn nnns 50 Appendix 5 HART HHT 275 372 Menu stucture ees esse ss ee ee se ee ee ee ee ee ee ee ee ees S2 IM 12D7B5 E E 1 INTRODUCTION AND GENERAL DESCRIPTION The Yokogawa EXAxt SC450G is a transmitter designed for industrial process monitoring measurement and control applications This instruction manual contains the information needed to install set up operate and maintain the unit correctly This manual also includes a basic troubleshooting guide to answer typical user questions Yokogawa can not be responsible for the performance of the EXAxt transmitter if these instructions are not followed 1 1 Instrument check Upon delivery unpack the instrument carefully and inspect it to ensure that it was not damaged during shipment If damage is found retain the original packing materials including the outer box and then immediately notify the carrier and the relevant Yokogawa sales office Make sure the model number on the nameplate affixed to the top of the instrument agrees with your order Example of the nameplate is shown below MODEL SUFFIX SUPPLY UM id 20 to 55 C SERIAL NO NN N200 Ce i APPROVED EG KE A YOKOGAWA 4 Amersfoort The Netherlands CLI DI
4. e e Configure hold Lifetime contacts Hold is the procedure to set the outputs to a known One should note that the lifetime of the contacts state when going into commissioning During is limited 10e When these contacts are used commissioning HOLD is always enabled outputs for control pulse frequency or duty cycle with will have a fixed or last value During calibration the small interval times the lifetime of these contact same HOLD function applies For calibration it is up should be observed On Off control is preferred to the user if HOLD is enabled or not over Pulse duty cycle IM 12D7B5 E E ONINOISSIININOO 4HANLONAIS nNa3lN p Output setup Y Configure Hold Input contact Select function Disabled Y Menu values min max Simulation IM 12D7B5 E E Parameter Percentage betup Simulate ercentage S1 fail Hard Soft Fail 1 simulation Contact off 50 00 ST USP USP safety margin Factor 10 mA1 Factor 10 mA 2 Factor 10 mA1 2 Default 5096 Hard Soft Fail Hard Fail only AJ On Off Contact off Al J gt On Off io Contact off S2 S3 S4 Similar structure to S1 depending on mA1 and mA2 output settings Range 096 10096 5 8 Fail A fail contact is energized when a fail situation occurs Fail situations are configured in secton 5 11 For SOFT Fails the contact and the display LED are p
5. 50000 81 0 mS cm 100000 140 mS cm Table 5 3 NaCl values at 25 C Note For resistivity measurement the standard resistivity units of the calibration solution can be calculated as follows R 1000 G kQ cm if G uS cm Example 0 001 weight R 1000 21 4 46 7 kQ cm IM 12D7B5 E E SSOIGNAddV 50 APPENDIX 4 Sensor selection for the EXAxt SC450G Yokogawa supplies the following sensors and their application is briefly described All are compatible with the EXAxt SC450G and the user must be aware of the sensor configuration for 2 or 4 electrodes in order to set the converter correctly SC42 SP34 amp SX42 SX34 cc 0 01 cm 2 electrode sensor This sensor is the first choice for pure and ultra pure water measurements From 0 055uS cm up to 100uS cm this is a perfect choice The measuring range extends to at least 1000uS cm but there are better choices in that range Almost exclusively used in flow fittings and sub assemblies FF40 and FS40 The SX sensors are screwed or flanged direct into the process pipework or tanks SC4A S T XX 002 cc 0 02 cm 2 electrode sensor This sensor is a good choice for pure and ultra pure water measurements From 0 055uS cm up to 50uS cm this is a good choice The measuring range extends to 500uS cm but there are better choices in that range The SC4A sensors make up a range that use compression adapters or specialized fittings includ
6. _ Expiry time 5 12 Error configuration Errors 1 3 3 3 Errors are intended to notify the user of any unwanted situations The user can determine which situations should be clasified as FAIL immidiate action is required The process variable is not reliable WARN the process variable processes by the transmitter is still reliable at this moment but maintenance is required in the near future FAIL gives a flashing FAIL flag in the main display The contact configured as FAIL Commissioning output setup will be energized continuously All the other contacts are inhibited A Fail signal is also transmitted on the mA outputs when enabled burn high low Commissioning gt gt output setup WARN gives a flashing WARN flag in the display The contact configured as FAIL is pulsed All the other contacts are still functional and the transmitter continues to work normally A good example is a time out warning that the regular maintenance is due The user is notified but it should not be used to shut down the whole measurement 5 13 Logbook configuration General Logbook is available to keep an electronic record of events such as error messages calibrations and programmed data changes By reference to this log users can for instance easily determine maintenance or replacement schedules In Configure Logbook the user can select each item he is interested in to be logged when the event occurs T
7. Tolerance 0 00 uS cm 0 02 mA De energized m Energized im 100 0 uS cm 1 5 uS cm 0 07 mA De energized De energized t 200 0 uS cm 3 0 uS cm j 0 12 mA De energized De energized i 500 0 uS cm 17 5 yS cm Energized i De energized 8 Approved by Ambient temp Humidity Databankweg 20 QIC 12D7B5 E H YOKOGAWA 4 one rte First Edition IM 12D7B5 E E 41 10 SPARE PARTS Item A Description Partnr 2 Pr rd PH version K1548FE 4 ver mblvy with ket rews and hin in K1548MY 10 Panelmounting kit K1541KR F Pipe wall Bert KABADKWN 12 Hashloaderkt TKI SAB FU K1548EC spare LCD for units delivered before may 2006 SN U5 K1548ED spare LCD for units delivered after April 2006 and for all models L 450 Q U K1548EE conversion kit for replacement of K1548EC by K1 948ED The kit includes pe unit and b Power Flatcable 9 Tag Plate 6 fuse at the backside 1 power board di eC a ae dad 8 glandset IM 12D7B5 E E SlAdVd ddvdsS 42 11 SOFTWARE HISTORY Software version 1 10 e Service menu moved to Advanced Setup Factory Adjustment e introduced Service password that is unique per device derived from S N via an algorithm e increased font size for unit in main screen e added the possibility to enter a four digit Operator ID after entering the Calibration and Commissioning password this ID will be logged e HOLD flag has been
8. Model SC450G ELF Instruction Conductivity Resistivity Manual Transmitter C YOKOGAWA Bei r o a OUER ER eaonaraizert YOKOGAWA e IM 12D7B5 E E Ath edition Measurement setup 7 Configure sensor 4 Temperature settings 4 Temp compensation 4 Calibration settings 4 Concentration Output setup Al A2 Output Alarm Alarm 4 Configure Hold Input contact Select function Disabled EXAxt 50450 Commissioning 1 3 Change language or Concentration a igh limit 250 0 mS Com missioning onductivity too low Warn or Concentration Y Commissioning 4 Output setup Input contact setup Error configuration 4 Logbook configuration Advanced setup rase logbook Calibration Display setup rase No am if logbook full No 7 Measurement setup 2 Advanced setup X axis Timing 4 Y axis Limits Auto Return 10 min PREFACE Electrostatic discharge The EXAxt transmitter contains devices that can be damaged by electrostatic discharge When servicing this equipment please observe proper procedures to prevent such damage Heplacement components should be shipped in conductive packaging Repair work should be done at grounded workstations using grounded soldering irons and wrist straps to avoid electrostatic discharge Installation and wiring The EXAxt transmitter should only be used with equipment that meets the relevant IEC
9. Tel 31 33 4641 611 Fax 31 33 4641 610 www yokogawa com eu IM 12D7B5 E E Subject to change without notice Copyright O YOKOGAWA CORPORATION OF AMERICA 2 Dart Road Newnan GA 30265 United States Tel 1 770 253 7000 Fax 1 770 251 2088 WWW yca com YOKOGAWA ELECTRIC ASIA Pte Ltd 5 Bedok South Road Singapore 469270 Singapore Tel 65 241 9933 Fax 65 241 2606 www yokogawa com sg Yokogawa has an extensive sales and distribution network Please refer to the European website www yokogawa com eu to contact your nearest representative YOKOGAWA 04 612 A Q Printed in The Netherlands
10. 200 C 10 to 120 C 20 to 120 C s 0 5 of reading 0 3 C s 0 4 C for Pt100 lt 0 02 mA 500 ppm C dee Vie 4 sec for 9096 for a 2 decade step D Transmission signals General Output function Control function Burnout function Two isolated outputs of 4 20 mA DC with common negative Maximum load 6009 Bi directional HARTe digital communication superimposed on mA1 4 20mA signal Linear or non linear 21 step table for Conductivity Resistivity concentration or temperature PID control Burn up 21 0mA or burn down 3 6mA to signal failure acc NAMUR NE43 Adjustable damping Expire time Hold E Contact outputs General Switch capacity Status The mA outputs are frozen to the last fixed value during calibration commissioning Four SPDT relay contacts with display indicators Maximum values 100 VA 250 VAC 5 Amps Maximum values 50 Watts 250 VDC 5 Amps High Low process alarms selected from conductivity resistvity concentration or temperature Configurable delay time and hysteresis PID duty cycle or pulsed frequency control FAIL alarm Control function On Off Adjustable damping Expire time IM 12D7B5 E E Hold The contacts are frozen to the last fixed value during calibration commissioning Fail safe Contact S4 is programmed as a fail safe contact F Temperature compensation Function Automatic or manual Proce
11. Delay Time 0 2 S Os Alarm S1 Expire Time 0 0 s Os Hold Fixed value mA1 12 mA 3 6 MA Hold Fixed value mA2 12 mA 3 6 mA IM 12D7B5 E E Expire time If the output is over 100 for longer than the expire time the output will return to O96 Setpoint Damping time The response to a step input change reaches approximately 90 percent of its final value within the damping time lt Delay time Delay time Figure 5 3 Alarm contact on off control controller output 100 tog gt 0 1 sec Duty cycle ton 4 toff Figure 5 2 Direct Reverse action Duty cycle 5 7 Contact output setput lone et see 1 S2 S3 S4 Each Switch contact can have the following ee functions 1 Control A selection of P PI or PID control Figure 5 4 Duty cycle control 2 Alarm Low or high value Limits monitoring 3 Hold A hold contact is energised when 5 COMMONS T DUADUE LE 100 the instrument is in HOLD 5 Fall S4 is set as fail safe contact Maximum pulse frequency 6 Simulate To test the operation of the contact mE simulate can be used The contact ind can be switched on or off or a ma CRINES RR ENS percentage of duty cycle can be entered DC period time Off Switch is not used USP USP EU limits for WFI H No pulses 5096 pulse frequency OO power on EE Figure 5 5 Pulse frequency control activated power on power down normal opened S1 S2 S3 E e e e
12. The contact output signals consist of voltage free relay contacts for switching electrical appliances SPDT They can also be used as digital outputs to signal processing equipment such as a controller or PLC It is possible to use multi core cables for the contact in and output signals and shielded multi core cable for the analog signals 3 4 2 Contact outputs The EXAxt 450 unit s four contacts switches that can be wired and configured to suit user requirements Contact S4 is programmed as a fail safe contact Please refer to section 5 7 Contact output setup for functionality description Alarm limits monitoring Contacts configured as ALARM can be energized when limits are crossed Fail Contacts configured as FAIL will be energized when a fail situation occurs Some fail situations are automatically signaled by the internal diagnostics electronics of the transmitter Others can be configured by the user see section 5 11 Error Configuration By pressing the INFO button on the main screen the user is given an explanation as well as a remedy for the current fail situation Always connect the fail contact to an alarm device such as a warning light alarm bell or displayed on an annunciator IM 12D7B5 E E cm N No S No Fal and Alarm inp wo mo When a fail situation occurs which is related to the parameter associated with the contact Conductivity Resistivity Concentration or temperatur
13. be adjusted for a number of different types of temperature sensors Details provided in this instruction manual are sufficient to operate the EXAxt with all Yokogawa sensor systems and a wide range of third party commercially available probes For best results read this manual in conjunction with the corresponding sensor instruction manual Yokogawa designed the EXAxt transmitter to withstand industrial environments It meets all the CE regulatory standards The unit meets or exceeds stringent requirements See section 2 without compromise to assure the user of continued accurate performance in even the most demanding industrial installations IM 12D7B5 E E NOILLAIAdOSACd IvHd3Nd39 ANY NOLLOCGCGOSWLNI A 2 2 GENERAL SPECIFICATIONS OF EXAXT SC450G A Input specifications B Input ranges Conductivity Minimum Maximum Resistivity Minimum Maximum Temperature Pt1000 Pt100 Ni100 NTC 8k55 Pb36 JIS NTC 6k C Accuracy Conductivity resistivity Temperature mA outputs Ambient temperature influence Step respons Two or four electrodes measurement with square wave excitation using max 60m 200ft cable WU40 WF10 and cell constants from 0 005 to 50 0 cm 0 000 uS cm 2000 mS cm 1uS x c c underrange 0 00 uS x c c 200 mS x c c overrange 2000 mS x c c 0 0 Uecm 1000 Uecm 5Q c c underrange 0 0 Q c c 1MQ c c overrange 1000 MQ2 c c 20 to 250 C 20 to 200 C 20 to
14. can save current settings as user defined defaults before proceeding Afterwards these settings can be restored from memory Note that we specify the environmental influences to our instruments in our specifications These should be taken into account when performing an overall accuracy test 8 Approval All our instruments are designed and manufactured to the highest standards All tests are performed under controlled ambient temperature and humidity by well trained employees IM 12D7B5 E E NOLLO3dSNI ALITVNO s Quality Model SC450G Inspection Conductivity and Resistivity Certificate Transmitter Device ID Software Revision Bonding i e Communication test Hart m Date Time t test EE E E E 50000200250 1000040059 2000040109 40 00 Q 0 200 50 00 Q 0 25 Q TT aa a Ad NENNEN EES ee T 50 00 Q 0 250 100 0 0 0 5 Q 200 0 Q 1 00 400 00 2 00 500 00 2 50 pi x NENNEN AT NNNM Se 1 eee eee 500 00 2 50 1000KO 0 005 KO 2 000 KO 0 010 KO 4 000kD 0 010kKN 5000kQ0 amp 0025kQ ssid ea BT Al ME 5 000 KO 0 025 KO 10 00 KO 0 05kQ 2000 KO 0 10 KO 4000k0 020kQ 50 00kQ 0 25KA 50 00 KO 40 25 KO 100 0 KO 40 5 KQ 200 0 KO 1 0 KO 400 0 KO 2 0 KO 500 0 KO 42 5 KO 1 000 MQ 0 005 MQ tolerance 10 C 25 C 75 C 120 C 190 C 240 C accuracy tests C C 0 1 c t1000 T mA1 Resistance Calculated Reading Tolerance Calculated Actual
15. caused by the early onset of polarization the factor that limits the upper range of the sensor in any case Polarization is seen in contaminated sensors and it is for this reason that there is a sophisticated polarization check built into the SC450G Details of this diagnostic tool are found in the troubleshooting section Chapter 9 EXAxt SC450G is programmed with the following table of conductivity of Potassium Chloride KCl solutions at 25 C This is used in the Automatic Cell Constant setting calibration feature See chapter 7 on calibration The table is derived from the Standards laid down in International Hecommendation No 56 of the Organisation Internationale de M trologie Legale molal m mgofKCI kg of solution 0001 7460 0 1469 mS cm 0002 14932 02916 mS cm 745 263 1 4083 mS c 7419 13 12 852 mS c 71135 2 111 31 mS c Table 5 2 KCI values at 25 C IM 12D7B5 E E N 49 If it is more convenient the user may make solutions from Sodium Chloride NaCl or common table salt with the help of the following relationship table This table is derived from the IEC norm 746 3 Weight 96 Conductivity 0 001 21 4 uS cm 0 003 64 0 uS cm 0 005 106 uS cm 0 01 210 uS cm 0 03 617 uS cm 0 05 1 03 mS cm 0 1 1000 1 99 mS cm 0 3 3000 5 69 mS cm 0 5 5000 9 48 mS cm 10000 17 6 mS cm 30000 48 6 mS cm
16. given a button look can be pressed to deactivate HOLD e After leaving Setup the HOLD status is made equal to the situation before entering Setup e routing tags in Output Configuration screen longer then 12 characters will be shown correctly e result of Predictive Maintenance calculation shown as time frame instead of date e improved detection analysis and handling of error 121 unstable measurement e improved error analysis Eeprom error generated for a completely uninitialized device e system errors during re start of device are now logged e fixed reset problem due to watchdog error caused by a full logbook from 1 01 e display changes from 4 to 3 digits at 500 xS cm instead of 200 e added the possibility to configure any output contact as USP contact e polarization now shown without unit Software version 1 20 e Firmware update for new LCD April 2006 e The pure water limit 25 is implemented in steps of 5 C from O to 135 C IM 12D7B5 E E APPENDICES APPENDIX 1 Temperature compensation The conductivity of a solution is very dependent on temperature Typically for every 1 change in temperature the solution conductivity will change by approximately 296 The effect of temperature varies from one solution to another and is determined by several factors like solution composition concentration and temperature range A coefficient o is introduced to express the amount of temperature influence in 96 change in conductivit
17. maintenance is needed is calculated from on line polarization checks The trend of polarization measurements on the sensor is used to calculate when to tell the user when to clean the sensor 8 6 Poor calibration technique When the calibration data is not consistent this fact is used as a diagnostic tool The significance of this error message is to require the user to improve his calibration technique Typical causes for this error are attempting to calibrate dirty sensors calibration solution contamination and poor operator technique 8 7 Error displays and actions All errors are shown in the Main Display screen however the EXAxt makes a distinction between diagnostic findings The error messages may be set to OFF WARN or FAIL For process conditions where a particular diagnostic may not be appropriate the setting OFF is used FAIL gives a display indication only of that the system has a problem and inhibits the relay control action and can be set to trigger the Burn function Burn up or Burn down drives the mA output signal to 21 mA or 3 6 mA respectively 8 8 Contrast adjustment During the life of the analyzer the contrast of the display may fade The contrast can be adjusted using the potentiometer on the backside of the LCD board The position is shown on this picture For units delivered prior to April 2006 the potentiometer is placed behind the little hole in the LCD N 9
18. setup gt gt Configure sensor The Calibration menu of the SC450G is provided for fine tuning the sensor setup and checking and verification after a time in service Where 1st and 2nd compensations are referred to in this part of the menu these provide alternatives for the wet calibration designed to give the user the greatest flexibility This does not mean that two cell constants can or should be calibrated they are alternative routes to the same end 6 2 Cell constant manual The intention of this calibration routine is to fine tune a sensor for which only the nominal cell constant is known or recalibrate a sensor that has been changed or damaged in the course of operation Choose 1st or 2nd compensation to suit the calibration solution used The solution should be prepared or purchased meeting the highest standards of precision available Allow the sensor to reach stable readings for both temperature and conductivity before adjusting to correspond to the calibration solution value The setting of a cell constant for a new replacement sensor is also possible in this routine This IM 12D7B5 E E avoids the need for entry into the commissioning mode which may have another authorization password level 6 3 Cell constant automatic This routine is built around the test method described in OIML Organisation Internationale de Metrologie Legale International Hecommendation No 56 It allows the direct use o
19. to make the most accurate measurements it is important to have a precise temperature measurement This affects the display of temperature and the output signal when used More important however is the temperature compensation and calibration accuracy The temperature of the sensor system should be measured independently with a high precision thermometer The display should then adjusted to agree with the reading zero offset calibration only For best accuracy this should be done as near to the normal operating temperature as possible 6 8 Operation of hold function during calibration EXAxt SC450G has a HOLD function that will suspend the operation of the control alarm relays and mA outputs During calibration the user may choose to enable HOLD so that the output signals are frozen to a last or fixed value Some users will choose to leave the outputs live to record the calibration event This has implications for pharmaceutical manufacture for example where an independent record of calibrations is mandatory Press HOLD button on mainscreen to remove the HOLD The route for HOLD setup is Commissioning gt gt Output setup gt gt Configure Hold 35 6 9 General comments on SC calibration a SC sensors experience no drift except if they are damaged or dirty b There are no good calibration solutions like pH buffer solutions c Solution calibration of SC demands laboratory technical skills d
20. updates potentio bracket M20 glands output terminal block protective shield bracket Figure 3 4 Internal view of EXA wiring compartment 3 2 Wiring 3 2 1 Preparation Refer to figure 3 4 The relay contact terminals and power supply connections are under the screening shielding plate These should be connected first Connect the sensor outputs and HARTe communication connections last To open the EXAxt 450 for wiring 1 Loosen the four frontplate screws and swing open the cover 2 The upper terminal strip is now visible 3 Remove the screen shield plate covering the lower terminal strip 4 Connect the power supply and contact outputs Use the three glands at the back for these cables IM 12D7B5 E E Always replace the screen plate over the power supply and contact terminals for safety reasons N and to avoid interference 5 6 Put back replace the screen shield plate over the lower terminals Connect the analog output s the sensor inputs and if necessary the HARTe wiring and input contact Use the front three glands for analog output sensor inputs contact input and HART wiring See figure 3 5 Swing back the cover and secure it with the four screws Switch on the power Commission the instrument as required or use the default settings 3 2 2 Cables Terminals and glands PH450 A D A The PH450 is supplied with terminals suitable for the connection of finished wir
21. with the temperature coefficient set to 0 00 C and use the following equation to calculate a temperature coefficient o Kr Kref TE ME N NEE MEEN d a T Ts K K Ker Teo T4 Tur pot Tig Tar Ky 1 a To Treg Ko 1 Ty Te K uS cm Ki a To Tg Kos a Ty Tig Ko Ki Ko K Q K T Tree Ko T T Ted Where T4 To liquid temperature C K conductivity at T C CS GBTIODO DVD Ara C Figure 11 1 Conductivity Calculation example Calculate the temperature coefficient of a liquid from the following data Conductivity 124 5 uS cm at a liquid temperature of 18 0 C and a conductivity 147 6 uS cm at a liquid temperature of 31 0 C Substituting the data in the above formula gives the following result 147 6 124 5 124 5 81 0 25 147 6 18 0 25 Set the temperature coefficient in the SC450G converter x 100 1 298 C IM 12D7B5 E E 45 Checking When the temperature coefficient already set is accurate the conductivity to be displayed must be constant regardless of liquid temperature The following check will make sure that the temperature coefficient already set is accurate If when the liquid temperature is lowered a larger conductivity value is indicated the temperature coefficient already set is too small The opposite also applies If a smaller conductivity value is indic
22. American or Canadian standards Yokogawa accepts no responsibility for the misuse of this unit The Instrument is packed carefully with shock absorbing materials nevertheless the instrument may be damaged or broken if subjected to strong shock such as if the instrument is dropped Handle with care Al ot use an abrasive or organic solvent in gle amp niNg the instrument Notice Contents of this manual are subject to change without notice Yokogawa is not responsible for damage to the instrument poor performance of the instrument or losses resulting from such if the problems are caused by e Incorrect operation by the user e Use of the instrument in incorrect applications e Use of the instrument in an inappropriate environment or incorrect utility program e Repair or modification of the related instrument by an engineer not authorised by Yokogawa Warranty and service Yokogawa products and parts are guaranteed free from defects in workmanship and material under normal use and service for a period of typically 12 months from the date of shipment from the manufacturer Individual sales organisations can deviate from the typical warranty period and the conditions of sale relating to the original purchase order should be consulted Damage caused by wear and tear inadequate maintenance corrosion or by the effects of chemical processes are excluded from this warranty coverage In the event of warranty claim the
23. EE a EE GE Ge 4 9 2 ee RR o 6 3 3 Wiring the OWE SUDDIY see Ee ee ee EI ie 8 3 4 Wiring tie oontact signals sees Ve she dU prd Se ie eub VERA ER Re 10 3 5 Wiring the mA output signals issie Sein SR Gee N ER Feb dmt ba GR EIE IEEE eed da 10 3 6 Mike SES orca c 11 4 OPERATION OF EXAxt SC450G seen 14 4 1 Main CHS Day TUNGIIONS ON Om os 14 4 2 Tenana ADCS Ne rU ETT 14 4 3 dad WE Ee aber MNT 14 4 4 AE ane E EE E E OE AEE A Ee Ee A 16 4 5 Setup calibration amp commissioning EE AAE R E AE 16 4 6 Secondary primary value display switch esse sere ee ee ee ee ee ee ee ee ee 16 4 f Navigation of the menu structure seke perenne hatt Fu Re EA ae 17 5 MENU STRUCTURE COMMISSIONING sese 19 5 1 ie gels See GER VO NE Ee ON 19 De TEMS hate sel se RE be SE a ER ee EE 19 Oo Temperature COMPENSATION si EE SEE N ER Ee ee ee koe see 19 5 4 ele der Ue TM AE EE UM 21 5 5 oasis MNT RE 21 5 6 AG ae 6 Ne Ellas cli 6 esr p ed 5 7 eie Bek Es ode AE AA OE MA OR AEE T AE 2 5 8 FAL EE EE EE 5 eEe 27 5 9 wlan M C 2 2f sco ENIMS cS ICTU 27 oI En eonia ie ie A TT 29 S14 Logbook COMMOTION ser ER ER eo EO ee ed 29 6 12 Advanced sell iss Ese En ei DI AR n Ke N so GED GE Di ae Ee 31 5 14 Display sq AE OO AA EE N DO ER DEE N 33 IM 12D7B5 E E 6 CALIBRATION
24. EMPERATURE CONCENT 2 mA1 control rocess parameter CONDUCT Setup P control gt P control Off Pl control PID control gt 0 0s P control mA1 Setpoint 500 0 HS EM ange 100 0 uS cm proportional band Direction Reverse xpiry time 0 s disabled anual Reset 0 000 96 in of the range mA1 output rocess parameter CONDUCT Linear gt Linear mA1 0 000 S cm 1 000 S cm 0 value 100 value Menu mA1 control MAT output mA1 simulate PID control mA1 PID control mA2 PID control mA1 PID control mA2 PID control mA1 PID control PID control Linear MA1 Linear mA2 Linear mA1 Linear mA2 Table IM 12D7B5 E E Parameter Expire time Damping time Simulation perc Setpoint Setpoint Range Range Manual Reset time D time 096 Value 10096 value Table mA1 mA 2 similar structure to mA1 Default 0 0 sec 0 0 sec 5096 250 0 uS cm 29 Cr 50 00 uS cm 10 C F 096 3600 sec O sec O S cm 0 C F 100 S cm 100 C F see appendix No action heck values No action Enter values 1800 sec 3600 sec 100 4 inf inf 4 inf inf 10096 3600 sec 60 sec 4 inf 4 inf 4 inf 4 inf 4 inf 23 5 6 mA output setup The general procedure is to first define the function control output simulate off of the output and second the process parameter associated to the output Available proces
25. NALS NNAW p 32 Main display onductivity unit 1stline Conductivity 2nd line Temperature 3rd line Empty Additional text X axis Timing Y axis Limits Auto Return 10 min Parameter Conduct low Conduct high Conduct 2 low Conduct 2 high Temp low Temp high IM 12D7B5 E E Conductivity Conductivity2 Conductivity Display setu P Conductivity2 Temperature raph S X axis Timing Y axis Limits Conductivity2 Temperature Empty onduc low 0 000 S cm high 500 0 HS cm onduc 2 low 0 000 S cm high 500 0 HS cm emp low 0 0 C high 100 0 C Default O uS cm 500 uS cm O uS cm 500 uS cm 0 C 32 F 100 C 212 F 5 15 Display setup Main Display The main display consists of three lines with Process Values Each line is user definable with the restriction that each line should have a different Process Value The default settings can be defined here By pressing one of the two smaller process values this will become the main process value in the main screen Autoreturn will cause the main display to go to default setting See also 4 6 Secondary to Primary Value display Switch Note Configuration possibilities in the main and secondary display lines are determined by the choices made in the menu measurement Measurement setup Measurement Additional text Each process value can be given an additional text containing up to 12 characters per text This text is
26. NSMITTER CONVERTER d 5 Core Screen White Co axial cable Overall Screen at 3 Core 07 Screen Brown Co axial Cable 12 blue 14 overall screen A ubt us NS Co axial cable 17 screen brown 11 red Figure 3 10 Connection of WF10 extension cable and BA10 junction box IM 12D7B5 E E Extension cable may be purchased in bulk quantities or in pre finished lengths In the case of bulk quantities cut to length then it is necessary to terminate the cable as shown below Termination procedure for WF10 cable 1 Slide 3 cm of heat shrink tube 9 x 1 5 over the cable end to be terminated 2 Strip 9 cm of the outer black insulating material taking care not to cut or damage internal cores 3 Remove loose copper screening and cut off the cotton packing threads as short as possible 4 3 cm heat shrink Figure 3 11 a cotton threads Figure 3 11 b Figure 3 11 c 13 Strip insulation from the last 3 cm of the brown and the white coaxial cores Extract the coaxial cores from the braid and trim off the black low noise screening material as short as possible Insulate the overall screen and the 2 coaxial screens with suitable plastic tubing Strip and terminate all ends with su
27. S3 perc S4 perc Serial number Software Revision Device Revision DD Revision Sensor data Output data Level 3 menu Calibration Sensor Pred Maint Settings mA1 mA2 S1 S2 S3 S4 Level 4 menu Online menu Most appl Error Calibration Hold Instrument Commissioning Level 1 menu Error description remedy CC Calibration SC1 CC Calibration SC2 Air Calibration Sample calibration SC1 Sample calibration SC2 TC Calibration SC1 TC Calibration SC2 Temp Calibration Hold Instrument Hold Outputs Hold Off Measurement setup Level 2 menu Meas Configure sensor Temp settings Temp compensation Calib settings Concentration Level 3 menu Sensor type Meas unit Fact CC Measure Temp sensor Temp unit Temp comp Man value Hef temp Method SC1 TC SOT Matrix SC1 Method SC2 TE SC2 Matrix SC2 Air adjust limit cc hi limit cc lo limit Stab time cal interval Additional table Conc table unit 53 Level 4 menu IM 12D7B5 E E SSOIGNAddV 54 Online menu Commissioning IM 12D7B5 E E Level 1 menu Output setup Level 2 menu mA1 setup mA2 setup similar to mA1 S1 setup S2 setup similar to S1 S3 setup similar to S1 S4 setup similar to S1 HOLD setup Input contact Error config Logbook config Level 3 menu Type control Func Process parameter PID SP PID Rng PID dir PID MR PID tim
28. Solutions can be used to give a fair calibration check at higher conductivity e Solutions can NOT be used to check calibration at low conductivity f Low conductivity solutions 10uS cm absorb CO2 from the air very fast g Low conductivity measurement must be made only with air excluded h Apparatus must be scrupulously clean to avoid contamination i Sensor linearity is never a problem for lower values j A dirty sensor is prone to polarization k Polarization shows as a low side error at higher conductivity I A dirty sensor will often read perfectly at low conductivity m Wet calibration tests are best done towards the top of a sensor s range n If the system responds correctly to the highest trip point all is well IM 12D7B5 E E NOILLVH8I IVO p 36 7 MAINTENANCE 7 1 Periodic maintenance The transmitter requires very little periodic maintenance except to make sure the front window is kept clean in order to permit a clear view of the display and allow proper operation of the touchscreen If the window becomes soiled clean it using a soft damp cloth or soft tissue To deal with more stubborn stains a neutral detergent may be used When you must open the front cover and or glands make sure that the seals are clean and correctly fitted when the unit is re assembled in order to maintain the housing s weatherproof integrity against water and water vapor Note Never use harsh chemicals or solvents I
29. V 2 GROUPS ABCD T6 FOR Ta 20 TO 55 C Figure 1 1 Nameplate Note The nameplate will also contain the serial number and any relevant certification marks Be sure to apply correct power to the unit as detailed on the nameplate 1 2 Application The EXAxt transmitter is intended to be used for continuous on line measurement of Conductivity Resistivity and or Concentration in industrial installations The unit combines simple operation and microprocessor based performance with advanced self diagnostics and enhanced communications capability to meet the most advanced requirements The measurement can be used as part of an automated process control system It can also be used to indicate operating limits of a process to monitor product quality or to function as a controller for a dosing delution system Sensors should normally be mounted close to the transmitter in order to ensure easy calibration and peak performance If the unit must be mounted remotely from the sensors WF10 extension cable can be used up to a maximum of 50 metres 150 feet with a BA10 junction box and up 10 metres standard sensor cable The EXAxt is delivered with a general purpose default setting for programmable items see Chapter 5 While this initial configuration allows easy start up the configuration should be adjusted to suit each particular application An example of an adjustable item is the type of temperature sensor used The EXAxt can
30. ainst electrical shock and against fire its mandatory that each instrument is tested for the bonding between protection earth and all accessible conductive parts on the outside of the instrument the insulation dielectric strength between the hazardous live parts at one side and the protection earth and low voltage parts at the other side 3 Functional tests e Visual check during start up e The Serial number is set see instrument description IM 12D7B5 E E e The voltage between terminals 11 amp 12 is checked This is required for temperature measurement e Burn high fail annunciation for mA output 1 61 62 and mA output 2 65 66 is tested 21m4A e Inout contact switch terminals 21 and 22 is checked e Contacts terminals 31 32 33 41 42 43 51 52 58 71 72 73 are checked Communication test HART During the complete test procedure the automated test equipment uses HART communication to operate the instrument When there are no signs of errors in the HART signals this test is completed Date Time test The current Date Time is set N DECADE BOX 1 Temperature RESISTANC ECADE BOX DECADE BOX 2 Conductivity HIGH RANGE RESISTANCE DECADE BOX 24 Volts DC Supply Figure 9 1 Connection diagram for Test Procedure 4 Sensor input linearity and accuracy tests After the instrument is initialized the linearity and accuracy is te
31. an also be used in dip tubes FD40 SC42 TPOS8 FPO8 cc 10 cm 4 electrode sensor These sensors are for extreme applications The PTFE or the PVDF used for the body of the sensor gives good chemical resistance for the strongly corrosive applications These sensors are intended for use in ranges 10mS to 1000mS cm Careful selection of the holder is needed The PVDF sub assembly is an obvious choice for the SC42 FPO8 and the PP flow fitting often has sufficient corrosion resistance for the application In any case selection must be done with due regard to the process conditions The 2 electrode versions SC42 T F PO4A do exist but like the epoxy version SC42 EPO4 they should be discounted for new applications 0 01 0 1 1 0 10 100 1000 uS cm Cell Constant 0 01 cm Cell Constant range Cell Constant Use 4 el Under useful range sensor Cell Constant 10 cm 0 00001 0 0001 0 001 0 01 0 1 1 10 100 1000 mS cm IM 12D7B5 E E SSOIGNAddV 52 APPENDIX 5 HART HHT 275 375 Menu structure Online menu Process values Zoom IM 12D7B5 E E Level 1 menu Primary value SC RES Conc Secondary value Temp Tertiary value SC RES Cond Zoom sensor Zoom outputs Zoom device Logbook Level 2 menu Fact CC Adj CC Method SC1 Method SC2 Pol96 Ohms USP mA1 value mA2 value S1 perc S2 perc
32. ated the temperature coefficient already set is too large In either case change the temperature coefficient so that the conductivity no longer changes Matrix compensation The compensation matrix is a table of temperature and conductivity values at differing concentrations These values are used to calculate the temperature compensation applicable for a particular solution Choose the component that you will be measuring in your application and where appropriate the concentration range The EXAxt will do the rest By following the routing Commissioning gt gt Measurement setup gt gt Temp compensation gt gt Matrix you gain access to the Matrix selection area Matrices are available for the common mineral acids and bases In addition Ammonia and Morpholine are included In short by using the matrix method specialist compensation is available for the majority of applications in the power industry water treatment and chemical manufacturing The following matrices are available initially but as with all Yokogawa products we are continually striving to improve both the quality and technological content Further solutions will be added to this list 35 88 IM 12D7B5 E E SSOIGNAddV 46 Temperature compensation matrix 1 A minimum number of values is required to make interpolation possible The highlighted values markes as A are mandatory to enter Concent ref ee EE NENNEN NNI Sox pP J
33. ation for cCSAus Kema Keur and FM Class 1 Div 2 Group ABCD Tg for T4 20 to 55 C FM Pending N Environment and operational conditions Ambient temperature 20 to 455 C Storage temperature 30 to 70 C Humidity O to 9096 RH non condensing Data protection EEPROM for configuration data and logbook Lithium cell for clock Watchdog timer Checks microprocessor Power down Reset to measurement Automatic safeguard Auto return to measuring mode when touchscreen is untouched for 10 min IM 12D7B5 E E SNOILVOIJIOddS IvHdNd9 z 4 Model code Suffix Code Option code SC450G Conductiity Resistivity transmitter Power A AC version 85 265 VAC D DC version 9 6 30 VDC E ORA oo Aways Options Predefined Tagnumber text only Quality and Calibration Certificate Universal Mounting kit panel pipe wall f the tagnumber is predefined with the purchase Yokogawa will inscript the tagplate with the specified tagnumber and program the tagnumber in the transmitter 3 INSTALLATION AND WIRING 3 1 Installation and dimensions The ambient temperature and humidity of the installation environment must be within 3 1 1 Installation site the limits of the instrument specifications See The EXAxt 450 transmitter is weatherproof and chapter 2 can be installed inside or outside It should however be installed as close as possible to the 3 1 2 Mounting methods sensor to avoid long cable runs be
34. ation of the analyzer The following messages will appear under normal default conditions Zoom in on Details Home key back to mainscreen One level up zZ ouo ouo BA dc O Scroll choices grey a 4 12 00 8 00 CrNext 34 Enter selected data or choice First Zoom screen gives you inside into the parameters involving current measurement All following zoom screens give Polarization 1 additional information Sensor Ohms 500 0 Q about the device and Next lead to logbook data Read logbook Sensor data Calibration Output data mA Figure 4 3 Detail screen means deactivated 4 3 1 actual mA the current output in mA of the first current output which is defined as mA1 The range and function of this mA output can be set in Routing Commissioning Output setup gt gt mA1 4 3 2 actual mA2 the current output in mA of the second current output which is defined as mA2 The range and function of this mA output can be set in Routing Commissioning Output setup gt gt mA2 4 3 3 S1 S2 S3 S4 the current state of contacts 1 to 4 The functions and settings of the contacts can be set in Routing Commissioning Output setup gt gt 1 S2 S3 S4 4 3 4 C C factory the nominal cell constant as determined by the factory calibration during production This value is set during commissioning and is found on the nameplate of the sen
35. ature Unit Celcius or Fahrenheit temperature scales can be selected to suit the user s preference When the unit is changed all temperature related parameters and settings will be recalculated 5 3 Temperature compensation Compensation Two types of methods can be used here Automatic for use of temperature element Select one of the Temperature elements used The other is a manual set temperature The manual temperature that represents the process temperature must be set here Reference Temperature Choose a temperature to which the measured conductivity or resistivity value must be compensated Normally 25 C 77 F is used therefore this temperature is chosen as the default value Method TC In addition to the temperature coefficient calibration routine it is possible to adjust the compensation factor directly If the compensation factor of the sample liquid is known from laboratory experiments or has been previously determined it can be introduced here Adjust the value between 0 00 to 3 50 96 per C In combination with reference temperature a linear compensation function is obtained suitable for all kinds of chemical solutions NaCl Temperature compensation according NaCl curve See appendix 1 for values Matrix The EXAxt is equipped with a matrix type algorithm for accurate temperature compensation in various applications Select the range as close as possible to the actual temperature concentration range The EXA
36. brated at the date of the last calibration 4 3 11 Calibration due at the date scheduled for the next calibration This field is determined by the calibration interval Routing Commissioning gt gt Measurement setup gt gt Calibration settings 4 3 12 Projected calibration at a diagnostic output showing a time frame when the unit should next be maintained according to the sophisticated self diagnostic tools built into the EXAxt software for example gt 12 months 3 6 months or O 1 month The analyzer checks the rate of polarization every 24 hours If a clear increase of polarization is observed the user is notified when a next calibration should take place Prior to calibration the sensor should be well cleaned and rinsed 4 3 13 Serial number serial number of the transmitter 4 3 14 Software revision the revision level of the software in the instrument IM 12D7B5 E E OOSGTOS KVYA AO NOILVHd3dO 16 4 3 15 HART Device revision Sometimes the firmware of a device is updated in a way that the communication file HART DD need revision too In this case the revision level is increased by one The revision level of the HART DD must match the revision level of the Firmware The revision level is expressed by the first two characters of the filename The following files should be used when the HART Device revision level is 2 0201 aot 0201 fms 0201 imp 0201 sym 4 3 16 Logbook The EXAxt contains
37. curacy and operation of a 4 electrode conductivity measuring system If an apparent increase in cell constant occurs cleaning the cell will restore accurate measurement 7 3 Cleaning methods 1 For normal applications hot water with domestic washing up liquid added will be effective 2 For lime hydroxides etc a 5 1096 solution of hydrochloric acid is recommended 3 Organic contaminants oils fats etc can be easily removed with acetone 4 For algae bacteria or moulds use a solution of domestic bleach hypochlorite Never use hydrochloric acid and bleaching liquid simultaneously The release of the very poisonous chlorine gas will result o A 33 8 TROUBLESHOOTING 8 1 General The EXAxt is a microprocessor based analyzer that performs continuous self diagnostics to verify that it is working correctly Error messages resulting from faults in the micro processor systems itself are monitored Incorrect programming by the user will also result in an error explained in a message so that the fault can be corrected according to the limits set in the operating structure The EXAxt also checks the sensor system to establish whether it is still functioning properly In the main display screen is a Status Information button that will show For information For warning a potential problem is diagnosed and the system should be checked For FAIL when the diagnostics have confirmed a problem an
38. d be between 7 amp 12 mm POWER 12 24V ZT 10W FUSE 1A 250 VAC T POWER 100 240 VAC 10 VA 50 60 Hz FUSE 500 mA 250 VAC T AC DC AN 32 31 33 42 41 43 NC C NO NC C NO mA1 HART mA OUTPUTS 250V 5A ANY AES 72 71 73 100VA 50W NC C NO C NC S2 CONTACTS S3 S4 fail safe IL LS INNER OUTER INNER OUTER ELECTRODE SENSOR S REFER TO INSTRUCTION MANUAL FOR CONNECTIONS Figure 3 7 Input and output connections 3 3 5 Grounding the housing For the safety of the user and to protect the instrument against interference the housing should always be connected to ground This has to be done by a large area conductor This cable can be fixed to the rear of the housing or by using the internal ground connections using a braided wire cable See figure 3 8 Figure 3 8 a External grounding 3 3 6 Switching on the instrument After all connections are made and checked the power can be switched on from the power supply Make sure the LCD display comes on After a brief interval the display will change to the measured value If errors are displayed or a valid measured value is not shown consult the troubleshooting section Chapter 8 before calling Yokogawa POWER 100 240 VAC 10 VA 47 63 Hz FUSE 500 mA 250 VAC T AC Figure 3 8 b Internal grounding IM 12D7B5 E E ONIHIIAA NV NOLLV TIV LSNI e 10 3 4 Wiring the contact signals 3 4 1 General precautions
39. d the system must be checked This button gives access to a status report page where The most applicable error will be displayed No errors is displayed during proper operation Explanation gt gt Description or error message and possible remedies Advanced troubleshooting gt gt Error code screen that is used in conjunction with the service manual This data will also be needed in the event that you request assistance from a Yokogawa service department What follows is a brief outline of the EXAxt troubleshooting procedures including possible causes and remedies 8 2 Calibration check The EXAxt SC450G converter incorporates a diagnostic check of the adjusted cell constant value during calibration If the adjusted value stays within 80 120 of the factory value it is accepted otherwise the unit generates an error message and the calibration is rejected 8 3 Polarization check The EXAxt SC450G performs on line monitoring to detect polarization This is an early indicator for sensor fouling The detection of polarization in the measurement gives a warning of the onset of sensor coating before significant measuring errors build up 3 8 4 Predictive maintenance EXAxt has a unique prediction feature Calibration and polarization check data are stored in software data logbooks This data is then used to calculate a prediction for maintenance purposes 8 5 Prediction of cleaning needed The date when the next
40. dOUTER CELL SX42 SX F SENSORS Figure 3 9 Sensor wiring diagrams RED YELLOW GREEN 11 Sensor wiring Refer to figure 3 9 which includes drawings that Outline sensor wiring The EXAxt can be used with a wide range of sensor types The sensor system fall into two categories the ones that use fixed cables and the ones with separate cables To connect sensors with fixed cables simply match the terminal numbers in the instrument with the identification numbers on the cable ends ONIHIIAA NV NOILVTIVLSNI e BA10 Connection 2 WF10 Extension Cable 15 O O 15 po Alee 14 B 0 14 i 14 14 17 OP P 13 Oo 13 12 OoOo 7 11 TEMPERATURE 12 TEMPERATURE 13 INNER ELECTRODE T 14 OUTER ELECTRODE 15 INNER ELECTRODE 16 OUTER ELECTRODE IM 12D7B5 E E 12 3 6 1 Sensor cable connections using and the WF10 extension cable should be used junction box BA10 and extension These items are manufactured to a very high cable WF10 standard and are necessary to ensure that the Where a convenient installation is not possible specifications of the system can be met The using the standard cables between sensors and total cable length should not exceed 50 metres transmitter a junction box and extension cable e g 5 m fixed cable and 55 m extension cable may be used The Yokogawa BA10 junction box EXA TRA
41. defective goods should be sent freight paid to the service department of the relevant sales organisation for repair or replacement at Yokogawa discretion The following information must be included in the letter accompanying the returned goods e Part number model code and serial number e Original purchase order and date e Length of time in service and a description of the process e Description of the fault and the circumstances of failure e Process environmental conditions that may be related to the failure of the device e Astatement whether warranty or non warranty service is requested e Complete shipping and billing instructions for return of material plus the name and phone number of a contact person who can be reached for further information Returned goods that have been in contact with process fluids must be decontaminated disinfected before shipment Goods should carry a certificate to this effect for the health and safety of our employees Material safety data sheets should also be included for all components of the processes to which the equipment has been exposed TABLE OF CONTENTS 1 INTRODUCTION AND GENERAL DESCRIPTION ee se ee ee se ee ee ee 1 1 1 Eer LEER oe EO m S 1 1 2 lee ie ie RE EO 1 2 GENERAL SPECIFICATIONS ee ee ee ee ee ee ee mener nnns 2 3 INSTALLATION AND WIRING ee ee ee ee ee menn 4 3 1 Installation and dimensions ee ER
42. displayed on the main display next to the process value This way the user can distinguish separate measurements X axis Timing The time range of the trend graph can be set from 15 minutes up to 14 days Y axis Limits The ranges for each measurement need to be set according the application Auto Return When Auto return is enabled the transmitter reverts to the measuring mode main display from anywhere in the configuration menus when no button is pressed during the set time interval of 10 minutes The HOLD flag will be cleared and all outputs will function normally 33 IM 12D7B5 E E ONINOISSININOO SENLONELS nNa3lN p 34 6 CALIBRATION 6 1 General The nominal cell constant of a conductivity sensor is determined at the construction stage because it is a factor set by the size of the electrodes and their distance apart A conductivity sensor does not change its cell constant during operation as long as it remains undamaged and clean It is therefore vital that in any calibration check the first step should be to clean the sensor or at least check its cleanliness After cleaning ensure that the sensor is carefully rinsed in distilled water to remove all traces of the cleaning medium In the commissioning menu the original sensor configuration will include the programming of the cell constant defined for the sensor at manufacture Follow the routing below to the setup screen Commissioning gt gt Measurement
43. e PID D time Burn Expiry time Type control Func Process parameter Expire time PID SP PID Rng PID dir PID MR PID time PID D time Analog output DC period time max pulse freq Type fail func HOLD L F mA1 fixed mA2 fixed Hold during cal Configure Input contact Configure error Off Warn Fail set limits Sensor logbook mA logbook Contact logbook Erase logbook Warn logbook full Level 4 menu Type output Func Process parameter Lin 0 Lin 100 Burn Damping time Type simulate Func Sim Perc Type Off Type alarm Func Process parameter alarm SP alarm dir alarm hyst alarm delay expiry time Type simulate func on off percentage Type hold func Type Off Calibration Sensor Predictive Maint All logbooks Online menu Loop test Basic setup Review Level 1 menu Tag Distributor Model Device information Model Distributor Write protect Manufacturer Dev id Tag Descriptor Message Date Universal rev Fld dev rev Sofware rev Poll addr Num red preams Level 2 menu Date Descriptor Message Poll addr Num resp preams Level 3 menu 55 Level 4 menu IM 12D7B5 E E SSOIGNAddV YOKOGAWA HEADOUARTERS 9 32 Nakacho 2 chome Musashinoshi Tokyo 180 Japan Tel 81 422 52 5535 Fax 81 422 55 1202 www yokogawa com YOKOGAWA EUROPE B V Databankweg 20 3821 AL AMERSFOORT The Netherlands
44. e the contact will go to NC When the fail situation is not related to the parameter associated with the contact the contact will remain in the state it is currently in 3 5 Wiring the mA output signals 3 5 1 General precautions The analog output signals of the EXAxt transmit low power standard industry signals to peripherals like control systems or strip chart recorders Figure 3 6 3 5 2 Analog output signals The output signals consist of active current signals of 4 20 mA The maximum load can be 600 ohms on each It is necessary to use screening shielding on the output signal cables Terminal 63 is used to connect the shielding 3 6 Wiring of sensors General precautions Generally signals from sensors are at low voltage and current level Thus a lot of care must be taken to avoid interference Before connecting sensor cables to the transmitter make sure that following conditions are met the sensor cables are not mounted in tracks together with high voltage and or power switching cables only standard sensor cable or extension cable is used the transmitter is mounted within the distance of the sensor cables max 10 m up to 60m WF10 extension cable the setup is kept flexible at the sensors end for easy insertion and retraction of the sensor in the fitting CONDUCTIVITY RESISTIVITY TRANSMITTER 12 TEMPERATURE 13 18 INNER CELL O 14 1St OUTER CELL 15 29d INNER CELL 16 2n
45. es in the size range of 0 13 to 2 5 sq mm 26 to 14 AWG The cable glandes supplied will form a tight seal on cables with an outside diameter of 7 to 12 mm 9 32 to 15 32 inches Unused cable entry holes must be sealed with cable glands including the blind plugs supplied OOO PH450 A D U The PH450 is supplied with terminals suitable for the connection of finished wires in the size range of 14 26 AWG The cable entry holes are sealed with FM certified plugs Prior to cable entry the plugs can be removed with allen key size 3 8 The cable conduit fittings can be mounted in the holes of the housing as required The cable glands supplied with the unit will give a tight seal on cables with outside diameter of 9 32 to 15 32 inches BE High voltage section QO Contact Contact S1 S2 mA S3 S4 output cables output cables cables Power Sensor contact cable Cables Suitable for cables with an outside diameter between 7 12 mm 0 28 4 72 Figure 3 5 System configuration IM 12D7B5 E E ONIdIM NV NOILYTIYLSNI e FRONT GLANDS LG ___Denotopenwhen energized REAR GLANDS T I Pos Sensor NU output signals Contact input Figure 3 6 System configuration 3 3 Wiring the power supply 3 3 1 General precautions Make sure the power supply is switched off Also make sure that the power supply is correct for the specifications of the EXAxt and that the
46. events concerning the contacts Each HMI screen can contain up to 5 events As each logbook can contain 50 events in total one can access previous events by selecting another page 1 to 10 4 3 17 Trouble shooting If you contact the local sales service organization the serial number and software revision is necessary information Without that information it is impossible to help you It is also very useful to report all the information that you find on the zoom in display 4 4 Information function In this field an information sign a warning sign or a fail sign YY can appear Pushing this button the user gets detailed information about the status of the sensor or the instrument if applicable See troubleshooting chapter 8 for further details 4 5 Setup Calibration amp commissioning By pressing the setup key you get access to the operating system of the transmitter based on menus and submenus Browse through the list using the key till you find the required menu and press the key to enter this menu It is also possible to press on the amp or Q symbol found beside the menu item 4 6 Secondary primary value display switch Pressing on this text block automatically switches the secondary value to the main display Large font size 25 0 4 7 Navigation of the menu structure EXAxt SC450 Commissioning Change language 7 Measurement setup Output setup Input contact setup Er
47. f the solutions prescribed in the test method automatically selecting the appropriate temperature compensation The look up table is used to find the appropriate conductivity reading for the measured temperature See appendix 2 for OIML solutions 6 4 Air zero calibration With the clean dry cell in open air the reading should be zero The Air cal compensates for excess cable capacitance and gives a better accuracy at low readings This should be done for all installations during commissioning After some time in service a dirty sensor may well show a high zero offset because of fouling Clean the sensor and try again 6 5 Sample calibration With the sensor in situ a sample can be taken for laboratory analysis Sample calibration records the time and reading and holds these in memory until the analysis has been completed The laboratory data can then be entered regardless of the current process value without the need for calculations 6 6 Temperature coefficient calibration Simply input the solution conductivity at reference temperature Tg after the sensor is allowed to stabilize at elevated temperature EXAxt SC450G will calculate the temperature coefficient for you The ideal temperature for this calibration is the normal process value Tp For good calibrations the minimum span Tp TR should be at least 2 C Note that the Temperature Compensation should be set to TC first 6 7 Temperature calibration In order
48. ge Because these changes should be handled as described in the maintenance section it does not make sense to regularly recalibrate the SC450G A calibration check however is another matter When the objective is clearly defined as a diagnostic exercise a regular check can bring an extra level of security and confidence to the measurement Sensor damage and or coatings can be difficult to see and the calibration check can confirm their presence by a deviation from the known solution conductivity The remedial action should be to clean the sensor and carefully check for blockage or damage not simply to recalibrate Higher conductivity solutions should be used where possible The lower the conductivity of the test solution the easier it is to contaminate Carbon dioxide from the air can be quickly absorbed to cause an error All containers must be suitably clean and all materials suitably pure Outside of a well equipped laboratory these conditions are hard to meet Also note that the check must be performed with due regard to the cell constant of the sensor as it limits the effective working range The documentation provided with the sensor should be consulted to determine its maximum working value By using a checking solution close to the upper range limit of the sensor the detection of contamination is better A slightly contaminated sensor may read perfectly at lower conductivity but show significant errors at higher values This is
49. his can be done for three separate logbooks Each logbook can be erased individually or all at once Enable the Warn if Logbook full when you would like to be warned when the logbook is almost full The content of the logbook s can also be retrieved from the transmitter using the EXAxt Configurator software package which can be downloaded from the Yokogawa Europe website Pus Flashing Fail flag in main display ael Flashing Warn flag in main display IM 12D7B5 E E ONINOISSIININOO 4ANLONAIS NNAW H 30 Defaults oad factory defaults After the defaults are loaded Save current as user defined he instrument will reset f oad userdefined defaults ag JEXAxt SC450 Advanced setup Passwords Date time HART Factory adjustment ommissioning ntering an empty password esults in disabling the pass ord check Date time fixed format Y Y Y Y MM DD 24 hours etwork address ode z 584543084D0xxxxxx nter your password _ Parameter Default val Network address 0 IM 12D7B5 E E 5 14 Advanced setup Defaults The functionality of the EXAxt allows to save and load defaults to come to a known instrument setting The EXAxt has both factory and user defined defaults After a load default the instrument will reset The following parameters are not included in the defaults l X axis timing Auto return 10 min disabled Tag Pas
50. ing retractable SC42 SP24 amp SX42 SX24 cc 0 1cm1 2 electrode sensor This sensor should be used for clean and pure water measurements From 0 2uS cm up to 1 mS cm the sensor is fine with measurement up to 10 mS cm possible but there are better choices in that range Mounting of these sensors is as for the SP X 34 series SC4A S T XX 010 cc 0 1 cm 2 electrode sensor This sensor is a good choice for clean water measurements From 0 5uS cm up to 200uS cm this is a good choice The measuring range extends to 2000uS cm but there are better choices in that range The SCAA sensors make up a range that uses compression adapters or specialized fittings including retractable SC42 EP15 D cc 1 cm 2 electrode sensor This sensor is intended as a handy short sensor It is easy to fit in a branch tee on a pipeline and is good for measurements where the precision is less critical than a convenient installation The D version is particularly suited to food applications because of it s cleanability Range of application is from 10 uS cm to 10 mS cm SC42 EP14 cc 1 cm 2 electrode sensor Clean cooling and process water applications are where this sensor is used The best range of application is 10uS cm to 10mS cm It is better suited to flow through installations in FS40 and FF40 adapters and fittings but it can also be used in dip tubes FD4O SC42 EP18 cc 1 cmt 4 electrode sensor Cooling and process water application
51. itable crimp terminals and identify with numbers as shown Finally shrink the overall heat shrink tube into position Ws 9 cm remove insulation ES EET PEEKS SS EN PES SS lt 3 cm IM 12D7B5 E E ONIHIIAA ANY NOLLV TIVLSNI e 14 4 OPERATION OF EXAXT SC450G 4 1 Main display functions Tag EXAxt SC45D 200 0 ys em C Figure 4 1 Main display 4 2 Trending graphics Fi Pressing the button changes the display into a graphical mode in which the average measured value is shown on a time scale The Live value is also digitally displayed in a text box The time scale X axis and the primary value scale Y axis are set in the DISPLAY SETUP menu The full screen displays a trend of 51 points that represent the average of the selected time interval The analyzer samples the measurement every second The trending graphic also shows the maximum and minimum measured value in that interval For example if the time scale is set to 4 hours then the trend is shown for 4 hours prior to the actual measurement Each point on the trend line represents the average over 4 60 60 51 282 measurements seconds Tag EXAxt SC 450 MES B Live reading 120 0 E i e hes H hi it i 109 3 uS cm 02 00 02 20 T bw Maximum Average Minimum Figure 4 2 Trend screen IM 12D7B5 E E 4 3 Zoom in on details This button gives access to the diagnostic inform
52. n the event that the window does become heavily stained or scratched refer to the parts list Chapter 10 for replacement part numbers Battery The EXAxt transmitter contains a logbook feature that uses a clock to provide the timings The instrument contains a lithium cell battery to support the clock function when the power is switched off The cell has an expected working life of 10 years Should this cell need to be replaced contact your nearest Yokogawa service center Fuse There is a circuit board mounted fuse protecting the instrument If you suspect that this needs to be replaced contact your nearest Yokogawa service center 7 2 Periodic maintenance of the sensor Note Maintenance advice listed here is intentionally general in nature Sensor maintenance is highly application specific In general conductivity resistivity measurements do not need much periodic maintenance If the EXAxt indicates an error in the measurement or in the calibration some action may be needed ref chapter 9 troubleshooting IM 12D7B5 E E When a 2 electrode sensor has become fouled an insulating layer may be formed on the surface of the electrodes and consequently an apparent increase in cell constant may occur giving a measuring error This error is 2 x Rv Rcel x 100 96 where Rv the resistance of the fouling layer Hcel the cell resistance Note Resistance due to fouling or to polarization does not effect the ac
53. nged the instrument will reset main display settings units and recalculate several values The menu structure will change accordingly 5 1 Configure sensor Sensor type Choose the sensor type used Normally conductivity and or resistivity measurements are done with 2 electrode type sensors At high conductivity ranges polarization of the electrodes may cause an error in conductivity measurement For this reason 4 electrode type sensors may be necessary Measuring unit cm m Either cm or m can be chosen here The process values will be expressed in S cm or S m respectively Q cm or Q m in resistivity mode Cell constant factory Cell constant given by factory calibration Usually given on a label on the sensor or the calibration certificate Only change this value in case a new sensor is used By changing this value the actual cell constant is also changed Measure Process values to be measured can be selected to suit the user s preference Conductivity only Concentration only or one of both Conductivity and Concentration Note this choice is not available in Resistivity mode 5 2 Temperature setting Temperature Element Selection of the temperature sensor used for compensation The default selection is the Pt1000 Ohm sensor which gives excellent precision with the two wire connections used The other options give the flexibility to use a very wide range of other conductivity resistivity Sensors Temper
54. oo EE EE EN 2 Tref reference temperature is defined in the Temperature Compensation menu If Tref is between T1 and T10 then the value of Tref needs to be entered as Tx T2 T9 concent Tref Ls EE Mad MEE kai Sox TT J PEE NEE ENE EER concent Tref dd e EE EE C10 The matrix can be cleared before entering 2 dode new values Next new matrix values can be MA n entered as described above The EXAxt can sii iw is ane interpolate the matrix During this process it will check if the matrix is completely ascending descending This is necessary as otherwise the lookup function can give two results for one temperature If an error is found the EXAxt will specify the location of the error as shown in the user interface screen user defined 1 2 Enter values the backspace key should be used for deleting an individual matrix value An empty value is shown as IM 12D7B5 E E APPENDIX 2 TDS readings The concept of Total Dissolved Solids TDS is widely used as an indication of the total solute concentration in water and is a widely accepted water quality standard The determination is simply made by evaporation and weighing the residue As the heat treatment converts the chemical properties of the solution some solutes that contribute to the total conductivity will not be found in the residue Also some combinations of solutes will become volatile at the dr
55. ot It provides rate feedback resulting in more damping High derivative gains can increase the rizing time and settling time It is difficult to realize in practice because differentiation leads to noisy signals Z Figure 5 1 Direct Reverse action IM 12D7B5 E E ONINOISSIININOO SENLONELS nNa3lN p 24 51 control Pl control 51 rocess parameter Setpoint CONDUCT ange 1 00 pH P control gt P control proportional band Direction Reverse Reverse PID control gt a a dans Duty cycle gt Pulse freq gt ontrol type Duty cycle gt xpiry time 0 0 s 0 s disabled 1 alarm rocess parameter Control p CONDUCT Setup alarm Alarm S1 Direction high high 4 500 HS EM low Delay time 0 2 s xpiry time 0 0 s 0 s disabled Output setup Output ast or fixed ixed value m 1 12 00 m ixed value mA2 12 00 mA ontact outputs are set to Configure Hold de energized during Hold old during Enabled Enabled alibration wash Disabled Parameter Default val PID control S1 Setpoint 250 0 uS cm PID control S1 Range 50 0 uS cm PID control S1 Manual Reset 096 PID control S1 time 3600 s PID control S1 D time Os Duty cycle DC period time 10s Pulse freq Max pulse freq 70 p min mA1 simulate Expire time 0 0 s Alarm S1 Setpoint 450 0 uS cm high Alarm S2 Setpoint 50 0 uS cm low inf Alarm S1 Hysteresis 4 500 uS cm O uS cm Alarm S1
56. roduced uncompensated conductivity in the DISPLAY menu In the LCD display the user can read the temperature and the raw conductivity to compare his water quality with the WEI table 3 We have added a USP function to the contact allocation Only contact 1 can be selected as USP alarm if the function USP detect has been selected The contact closes when the USP limit is reached USP Safety Margin Figure 5 6 USP Safety Margin Limit of uncompensated conductivity as function of temperature as defined for WFI USP Alarm Limit set as 20 will close the contact at 80 of the conductivity value at all temperatures For example if the temperature is 64 C and the safety margin is adjusted for 20 then the contact closes at 0 8 x 2 2 uS cm 1 76 uo cm 2 2 uS cm is the WEI limit at 64 C In resistivity mode the contact will close at an uncompensated resistivity of 1 1 76 uS cm 0 568 Mohm Recommended Commissioning settings when monitoring WFI in a gt 80 C WEI installation Commissioning Measurement Set up Measure Temp Compensation Conductivity 1 Conductivity only automatic None Error Configuration Errors 2 3 USP Limit exceeded Warn Output Setup S1 USP 2 Alarm Parameter Setpoint Direction Delay Time Expiry Time Temperature 80 C Low 0 2 s O disabled 5 11s Input contacts The terminal of the SC450G p
57. ror configuration Logbook configuration exit to previous 1 RETURN KEY Jr gt Main display gt Primary setup display gt Commisioning menu display IM 12D7B5 E E OOSYOS IXVX4 AO NOILVHJdO 18 Conductivity Resistivity Measurement setup easure Conductivity only 7 Configure sensor e oo Temperature settings 49 Temp compensation Calibration settings Concentration Configure sensor 2 electrode 4 electrode Sensor type 2 electrode easuring unit cm icm ell constant 0 1000 cm easure Conductivity only Conductivity only Conduct Concentr Concentration only Temperature emp element sc nit Temp comp ompensation eference temp 25 0 C ethod Conductivity 1 NaCl Conductivity 2 None Note N Main parameter and or Measure determines the rest of the HMI menu structure Menu Parameter Default Range values min max Configure Sensor Cell constant 0 1 ome 0 005 ome 50 cm Temp Comp Reference Temp 25 C 77 F OC 4 F 100 C 212 F Manual Comp Manual Temp EG Xf 20 C 32 F 250 C 482 F Temp Coef T C methods 1 2 10 C 10 C 18 F 10 C 1896 F Temp Coef T C methods 2 2 10 C 0 C 0 F 3 5 C 296 F IM 12D7B5 E E 19 5 MENU STRUCTURE COMMISSIONING Measurement setup Main parameter Choose the required parameter either conductivity or resistivity If the main parameter is cha
58. rovides for an input contact see Figure 3 7 This input contact can be used to switch the range of the outputs The range can be increased by 1 decade IM 12D7B5 E E ONINOISSIININOO SENLONELS nNa3lN p 28 1 3 onductivity too high Warn Warn or Concentration Fail igh limit a onductivity too low Off or Concentration EN ai Errors 28 Warn Temperature too high Temperature too low Warm Polarization detect Warn t Calibr time exceeded Off USP limit exceeded Warn cF Next 3 3 onfiguration error 1st comp matrix Fail 2nd comp matrix Fail Concentration table Fail Configure logbook Settings logbook mA Settings logbook contact rase logbook Calibration rase No arn if logbook full No Calibration Sensor Pred Maint all Default Parameter Menu Errors1 3 Errorsi a Errors1 3 Errors1 3 Cond High Limit 250 mS Cond Low Limit Res Low Limit Hes Low Limit IM 12D7B5 E E selector selector selector ES B Fail ml SIE 3 ZEE ress de and use the off on mA settings ress m and use the off on Contact settings ress m and use the off on Error off Temperature coeff Air adjust limit Adj c c low limit Adj c c high limit Reference temp Reference temp Hold fixed value Control setpoint Control range Contact setup
59. s are where this sensor is used including light fouling The best range of application is 100uS cm to 100mS cm The four electrode system copes with some contamination from the process and eliminates the tendenoy for polarization to occur at the higher conductivity It is better suited to flow through installations in F540 and FF40 adapters and fittings but it can also be used in dip tubes FD40 IM 12D7B5 E E 51 SC42 EP04 cc 10 cm 1 2 electrode sensor This sensor is in the program for historical reasons It makes little sense to select this sensor for new applications It was used mostly for process water and light process solutions The operating range can be 1to 100 mS cm with higher readings having a very high risk of polarization The SC42 EP18 or the SC42 EP08 4 el sensors covers these ranges with much greater certainty of avoiding polarization SC42 EP08 cc 10 cm 4 electrode sensor Process applications are where this sensor is used including light fouling The best range of application is 1mS cm to 500mS cm The four electrode system copes with some contamination from the process and eliminates the tendency for polarization to occur at the higher conductivity The upper limit is determined more often by chemical compatibility The epoxy material is attacked by many of the chemicals that are present in high conductivity solutions It is better suited to flow through installations in FS40 and FF40 adapters and fittings but it c
60. s parameters depend on the selected main parameter and measure Proportional control will reduce but not eliminate the steady state error Therefore proportional Control action includes a Manual Reset The manual reset percentage of output is used to eliminate the steady state error Note Any changes disturbances in the process will re introduce a steady fail safe contact Burn Low or High will give an output of 3 6 resp 21 mA in case of Fail situation Note When leaving Commissioning Hold remains active until switched off manually This is to avoid inappropriate actions while setting up the measurement Proportional control Proportional Control action produces an output signal that is proportional to the difference between the Setpoint and the PV deviation or error Proportional control amplifies the error to motivate the process value towards the desired setpoint The output signal is represented as a percentage of output 0 100996 Off When an output is set off the state error Proportional control can output is not used and will give an also produce excessive overshoot and output of 4 mA oscillation Too much gain may result in Control A selection of P PI or PID control an unstable or oscillating process Too Manual Static output required to maintain little gain results in a sustained steady reset equilibrium state with setpoint state error Gain 1 Range PV units Direction Direct If
61. several logbooks to store historical information on events changed settings and calibrations The logbooks have been categorized to simplify the retrieval of this information Calibration will give information of previous calibrations This logbook is useful as one now can 1 Monitor the sensor performance over time 2 Monitor the sensor s lifetime Sensor will give all historical information on parameter settings concerning the sensor s The events logged in this logbook are user definable This is done in Commissioning gt gt Configure Logbook gt gt Sensor Logbook Predictive maintenance If the sensor diagnostics of the EXAxt are enabled the diagnostics are saved into this logbook For the EXAxt SC450G the polarization due to fouling is stored once a day This information can be used for predictive maintenance schedules as the polarization is a measure of fouling and the sensor should be kept clean for best results Settings wil give all history information on parameter settings concerning the analog outputs mA1 mA2 and contact S1 S4 This logbook is useful to trace back differences in performance due to changed settings The events logged in this logbook are user definable This is done in Commissioning Configure Logbook Settings Logbook mA and or Settings Logbook contact IM 12D7B5 E E mA1 mA2 shows all dynamic events concerning the analog outputs 1 S2 S3 S4 shows all dynamic
62. sor or the calibration certificate Routing Commissioning gt gt Measurement setup gt gt Configure sensor 4 3 5 C C adjusted the calibrated cell constant When the cell constant of the system is adjusted on line by grab sample or by calibrated solution technique the new cell constant is recorded here This value should not deviate greatly from the original factory calibration In the event that there is a significant discrepancy seen between this reading and the C C factory value the sensor should be checked for damage and cleanliness Routing is via the Calibration menu 4 3 6 Temp comp 1 the chosen temperature compensation method for the primary measurement Routing Commissioning gt gt Measurement setup gt gt Temp compensation 15 4 3 7 Temp comp 2 the chosen temperature compensation method for the secondary measurement Note This does not imply two separate measurements There is the possibility to set two separate compensation methods so that two different stages of the same process can be monitored accurately An example is process cleaning fluid interface Routing Commissioning gt gt Measurement setup gt gt Temp compensation 4 3 8 Polarization the polarization is measured by the input circuitry Monitoring this figure gives a guide to progressive fouling of the sensor 4 3 9 Sensor ohms the input measurement as an uncompensated resistance value 4 3 10 Last cali
63. ss compensation by configurable temperature coefficient NaCl curve 13 pre defined matrices or 2 user programmable matrices G Calibration Semi automatic calibration using pre configured OIML KCl buffer tables with automatic stability check Manual adjustment to grab sample H Logbook Software record of important events and diagnostic data readily available in the display I Display Graphical Quarter VGA 320 x 240 pixels LCD with LED backlight and touchscreen Plain language messages in English German French Spanish and Italian J Shipping details Package size 293 X 233 X 230 mm Lx W x D 11 5 x YL x 9 1 inch Package weight app 2 5 kg 5 5lbs K Housing Cast Aluminim housing with chemically resistant coating Polycarbonate cover with Polycarbonate flexible window Protection IP66 NEMA4X Colour Silver grey SC450 A D A IP66 cable glands are supplied with the unit SC450 A D U NEMAAX blind plugs are mounted in the unused cable entry holes and can be replaced by conduit fittings as required Pipe Panel or Wall mounting using optional hardware L Power supply 100 240 VAC 10 Max 10VA 47 63Hz 12 24 VDC 410 max 10W M Regulatory compliance EMC Meets directive 89 336 EEC Emission conform EN 55022 class A Immunity conform IEC 61326 1 Low Voltage Meets directive 73 23 EEC Conform IEC 61010 1 UL61010C 1 and CSA 22 2 No 1010 1 Installation category Il Pollution degree 2 Certific
64. sted This is done by connecting a decade box between terminal 15 and 13 The measured Sensor Ohms are shown in the Zoom screen By pressing the magnifying glass and next one will find the value 5 Temperature accuracy tests The EXAxt supports a number of temperature elements All these elements are initialized and tested for accuracy The resistor decade box is set to the following impedance values to accurately simulate the temperature element impedance po 10 C X 25 C 75 C 120 C 190 C 240G Pt1000 960 9 Q 1097 4Q 1290 0 Q 1460 6 Q 1721 6 Q 1904 6 Q PHHOO 1Q 1097Q 1290Q 1461Q 17229 5k o BO 1142Q 1449Q 1759Q 23189 8K55 47000 0Q 8550 0 Q 1263 0Q 34300 PB36 94140 l 21790Q 42120 13839 6 mA output accuracy The EXAxt simulates a number of mA output values The accuracy of both mA outputs is checked with a load of 3009 The ripple voltage over the 300 load is measured and should be within 30mV RMS With a load of 600 the instrument should still be able to transmit a signal of 22mA no signal drop with maximum load 7 Overall accuracy tests All separate accuracy tests are performed As all these accuracies will accumulate or influence each other an overall accuracy test is performed Note That the instrument is set to default values as certain settings like temperature compensation will alter the transmitted signal If one decides to perform an overall test one
65. supply agrees with the voltage specified on the textplate Local health and safety regulations may require an external circuit breaker to be installed The instrument is protected internally by a fuse The fuse rating is dependent on the supply to the instrument The 250 VAC fuses should be of the time lag type conforming to IEC127 Fuse ratings Power supply 9 6 30VDC 10W max 1A 250V Slow 85 265VAC 10VA max 0 5A 250V Slow Refer to the service manual for fuse replacement Fuse type 3 3 2 Access to terminal and cable entry Terminals 1 2 and 3 are used for the power supply Guide the power cables through the gland closest to the power supply terminals The terminals will accept wires of 2 5 mme 14 AWG Always use cable finishings if possible IM 12D7B5 E E LI Power Contact output lt 58 d BO d BO d c 58 d Contact output 3 3 3 AC power Connect terminal L1 to the phase line of the AC power and terminal N to the zero line See figure 3 8 for the power ground This is separated from input ground by a galvanic isolation 3 3 4 DC power Connect terminal 1 to the positive outlet and terminal 2 to the negative outlet Terminal 3 is for the power ground This is separated from input ground by a galvanic isolation A 2 core screened cable should be used with the screen connected to terminal 3 The size of conductors should be at least 1 25 mm The overall cable diameter shoul
66. swords Date and time Language The contents of all logbooks HART parameters address tag descriptor message EE Priscus pe Tag A tag provides a symbolic reference to the instrument and is defined to be unique throughout the control system at one plant site A tag can contain up to 12 characters If the instrument is purchased with the SCT option the TAG is pre programmed with the specified tagnumber Passwords Calibration and Commissioning may be separately protected by a password By default both passwords are empty Entering an empty password results in disabling the password check A password can contain up to 8 characters When a password is entered for the calibration and commissioning a 4 digit operator ID can be entered One can also leave the ID empty Date time The Logbooks and trend graph use the clock calendar as reference The current date and time is set here The current time is displayed in the third zoom menu Note The fixed format is YYYY MM DD HH MM SS HART The address of the EXAxt in a HART network can be set Valid addresses are O 15 31 Factory adjustment This menu is for service engineers only This section is protected by a password Attempting to change data in the factory adjustment menu without the proper instructions and equipment can result in corruption of the instrument setup and will impair the performance of the unit IM 12D7B5 E E ONINOISSIININOO 4ANLO
67. the process variable is too high Integral Control relative to the SP the output of the Integral control is used to eliminate the steady controller is increased state error and any future process changes direct action It will accumulate setpoint and process load Reverse changes by continuing to adjust the output If the process variable is too high until the error is eliminated Small values of relative to the SP the output of the integral term I time in seconds provide quick controller is decreased compensation but increase overshoot Usually reverse action the integral term is set to a maximum value Output Linear or non linear table output that provides a compromise between the three The table function allows the confi system characteristics of overshoot settling guration of an output curve by 21 time and the time necessary to cancel the steps 596 intervals In the main effects of static loading process changes The menu concentration can be selec integral term is provided with an anti windup ted to set the concentration range function When the output of PI portion of the Simulate Percentage of output span controller is outside the control range less than Normal span of outputs are 5 or greater than 105 the I part is frozen limited from 3 8 to 20 5 mA Fail safe Contact S4 is programmed as a Derivative control The control acts on the slope rate of change of the process value thereby minimizing oversho
68. tween sensor Hefer to figures 3 2 and 3 3 Note that the and transmitter In any case the cable length EXAxt transmitter has universal mounting should not exceed 60 metres 197 feet Select capabilities an installation site where e Mechanical vibrations and shocks are e Panel mounting using optional brackets negligible e Surface mounting on a plate using bolts e No relay power switches are in the direct from the back environment e Wall mounting on a bracket for example on e Access is possible to the cable glands see a solid wall figure 3 1 e Pipe mounting using a bracket on a e The transmitter is not mounted in direct horizontal or vertical pipe maximum pipe sunlight or severe weather conditions diameter 50 mm e Maintenance procedures are possible avoiding corrosive environments IM 12D7B5 E E 144 5 67 min 185 7 25 HR _ H P 138 5 43 FR NIU O O N N OO Figure 3 1 Housing dimensions and Figure 3 2 Option UM Universal mounting layout of glands kit panel mounting diagram wall mounting pipe mounting pipe mounting vertical horizontal n X liA e 2 ND pipe OPTION UM Universal pipe wall panel mounting kit Figure 3 3 Wall and pipe mounting diagram IM 12D7B5 E E ONIdIM NV NOILVTIVLSNI e input terminal block connector for future software
69. ulsating For HARD Fails the contact and the display LED are energized continuously Only contact S4 is programmed as a fail safe contact This means that contact S4 will be de energized when a fail situation occurs Hard fail only e contact reacts to Hard Fails Only Hard soft fail The contact reacts to Hard and Soft Fails 5 9 Simulate The contact can be switched on off or a percentage of output can be simulated On Off enables the user to manually switch a contact on or off The percentage is an analogue value and represents the on time per period The Duty Cyde Period time See figure 5 4 is used as a period for percentage simulation Note that the simulated settings of the contacts become visible in measuring mode and after HOLD has ended c q has been overruled A warning is activated in case of a simulated output contact 5 10 Water for Injection Monitoring USP 645 and EU 0169 Setting up EXA SC450 for WFI monitoring 1 In Software Rev 1 1 a function USP detect is defined as Error Code on page 29 Error 2 3 This can be set to off warn fail according to your requirement This function can be modified by the function USP alarm limit in This a percentage of the WFI conductivity value at that temperature that serves as safety margin This is independent of what is being measured The display shows this error when the water quality exceeds the WFI conductivity limits as set in stage 1 2 We have int
70. val 250 days 250 days Concentr Table Table See appendix IM 12D7B5 E E 5 4 Calibration settings Air adjust limit To avoid cable influences on the measurement a zero calibration with a dry sensor may be done If a connection box BA10 and extension cable WF10 are being used zero calibration should be done including this connection equipment When using a 4 electrode sensor additional connections are required Temporarily Interconnect terminals 13 amp 14 with each other and 15 amp 16 with each other before making the adjustment This is necessary to eliminate the capacitive influence of the cables The links should be removed after this step is completed As the calibration is performed in air the resistivity is infinite open connection Higher conductivity values than the air adjust limit indicate the cell is not in air or is still wet To prevent wrong air calibrations a limit must be given here c c high limit High limit of the cell constant expressed in 96 of nominal value During calibration this value is used to check if the calibrated cell constant remains within reasonable limits c c low limit Low limit of the cell constant expressed in 96 of nominal value During calibration this value is used to check if the calibrated cell constant remains within reasonable limits Stabilization time During calibration the stability of the measurement is constantly monitored When the value is within a band
71. width of 196 over a period of the stabilization time the calibration is considered stable and the calibration may be completed Calibration Interval A user defined interval in which a new calibration should take place If the interval is exceeded the instrument will give a warning or a fail user definable in error configuration 2 3 21 5 5 Concentration Concentration has a direct relation with the conductivity value at reference temperature This relation is built in every matrix which are used for temperature compensation These can be found in Commissioning gt gt Measurement setup gt gt Temp compensation gt gt Method By selecting one of the matrices for temperature compensation directly gives the concentration value on the main display If another temperature compensation method is chosen NaCl or T C the relation between the conductivity at reference temperature and the concentration is obtained from the Concentration table Additional table This 21x2 user defined concentration table is used to come to more accurate concentration values compared to the temperature compensation matrix Enabling this additional table overrules the concentration values obtained from the matrix if used Unit for table The way the concentration values are presented to the user Changing the unit will not result in a re calculation of the table IM 12D7B5 E E ONINOISSININOO SENLONELS nNa3lN s 22 CONCENT T
72. xt will compensate by interpolation If user defined 1 or user defined 2 is selected the temperature compensation range for the adjustable matrix must be defined See Appendix 6 for matrix interpolation Note Extra information on temperature compensation is given in appendix 1 IM 12D7B5 E E ONINOISSIININOO 4ANLONAIS NNAW p 20 Measurement setup Al Calibration easure Conductivity only Limits Configure sensor Air es 10 00 y Mm eee Temperature settings em mg 120 0 low 80 00 9 Temp compensation 4 Calibration settings Timing Concentration Stabilization time 5 s et Calibr interval 250 days sd Concentration measurement is only possible if measure in the Configure sensor menu is set to conductivity concentration or Concentration only Concentr table No action Yes Additional table lear table No action heck values No action No action efer to section 5 of the IM ow to set up Concentration easurement Enter values Concentr table 13 Concentr table 23 Concentr table 3 3 96 Sicm i Siem 96 96 i Siem 96 96 T Siem 96 96 Siem i A Siem 96 i 96 i S cm mandatory 5 Next none mandatory gt Fini mandatory nmap wna Parameter Default Calibration Air adjust 10 00 uS c c high 12096 c c low 8096 Stabilization time 58 Calib inter
73. y C In almost all applications this temperature influence must be compensated before the conductivity reading can be interpreted as an accurate measure of concentration or purity NaCl or standard temperature compensation From the factory the EXAxt is set with the default of a general temperature compensation function based on a Sodium Chloride table salt solution This is suitable for many applications and is compatible with the NaCl compensation functions of typical laboratory or portable instruments SC temperature compensation 43 Tt kt fa Table 11 1 NaCl compensation according to IEC 746 3 with Tref 25 C Configure calculated temperature coefficient TC Follow routing Commissioning gt gt Measurement setup gt gt Temp compensation gt gt T C Enter the temperature coefficient calculated from the following formula A Calculation of temperature coefficient factor With known conductivity at reference temperature Q Kt Tref Kref K er 100 EEN X T 5 Ts Kei Temperature compensation factor in C Measured temperature in C Conductivity at T Reference temperature Conductivity at Tref IM 12D7B5 E E AHOLSIH JHVMLJOS SSOIGNAddV v AA B Calculation of temperature coefficient factor with two known conductivity values at different temperatures Measure the conductivity of the liquid at two temperatures one below the reference and above the reference temperature
74. ying temperature The same applies for those solutes that do not contribute to the conductivity but do end up in de residue When one or a few solute is dominant in the solution these problems may be neglected and TDS will have a direct correlation with the conductivity Next is a graph that shows the correlation between the specific conductance and concentrations by weight for six salts The factor by which the conductivity should be multiplied to come to a TDS reading ranges from 0 4 to 0 7 up to a conductivity of 500 uS cm At a conductance of approximately 3000 uS cm the range would be from 0 5 and 1 0 The EXAxt 450 measures conductivity This value can be used to display TDS values on the main display One should use the additional concentration table Please refer to section 5 5 for concentration measurement The unit for the TDS reading can be set to ppb or ppb Specific conductance uS cm 25 C 47 NaCl KCI CaCl 4 MgCl Na SO 4 M eo 1000 2000 3000 4000 5000 Concentration mg L IM 12D7B5 E E SSOIGNAddV 48 APPENDIX 3 Calibration solutions for conductivity N Note This section should be read in conjunction with the calibration section Chapter 7 and the maintenance section Chapter 8 The calibration cell constant of a sensor does not change unless the sensor is damaged It can also appear to change because of coating of the electrodes or partial blocka

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