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Model PH450G [Style: S2] pH and ORP Converter

1. ii 12 3 5 1 General PrECAUTIONS geegegie te fekrane getest Senge 12 3 5 2 Analog output SIGNALS sro aa iaia 12 3 6 Wiring the sensor system E 13 3 6 1 Impedance measurement jumper Settings 13 eE IRE Tnt 13 3 7 1 Connection ee E 13 3 7 2 Sensor cable connection with special grommet 450G 0 A version 16 3 7 3 Sensor cable connections using junction box BA10 and extension ci LA 17 4 OPERATION OF EXAxt PH450G iii 19 41 Main display TUNCIHONS cl aa 19 S e ne age iz eR ARR E RA AAT 19 d 5 Zoom NON e TE 19 En E ert MA EE 19 SZ e T 19 A RR IRA 19 4 3 4 ae toe 20 IM 12B07C05 01E 4th Edition Mar 2012 YK All Rights Reserved Copyright 2007 Yokogawa Electric Corporation IM 12B07C05 01E ETNE 20 4 3 6 Reference impedance EE 20 4 3 7 Last calibrated E 20 4 3 8 Calibration due E 20 4 3 9 Projected Gallen e T T 20 4 3 10 Projected replacement WWW WWW mma 20 4 3 11 Serial UNE aio 21 4 3 12 Software revision iii 21 4 3 13 HART Device revislon EE 21 4 3 14 Oka T 21 ee oa toe ee feta 21 4 5 Setup calibration amp COMMISSIONING scri 21 4 6 Secondary primary value display switch 21 4 7 Navigation of the menu Structure nens 22 4 8 Setup Concentration mode 22 5 MENU STRUCTURE COMMISSIONING KENNEN EEE
2. Do not open when energized I I I L I I CMPL 12B07C05 02E Part No K9171SS Y9608KU D0117XL A K9171SY K9171SX K9171ST Y9520LU K9171SW Y9608KU K9676BA A NNa SAARE Panel Mounting Hardware Option code PM UNIVERSAL MOUNT SET Option code UM includes both U and PM Description Mounting Set U Screw U Bolt Assembly Plate Bracket Mounting Set PM Screw Bracket Screw Awning hood assembly H5 4th Edition Oct 2011 YK
3. Copyright 2012 4th Edition Aug 2015 YK IM 12B07C05 01E YOKOGAWA SE EES 4th Edition Yokogawa Electric Corporation 2 2 GENERAL SPECIFICATIONS OF EXAxt PH450G A Inputs specs B Input ranges Dual high impedance input 10120 under referance conditions pH 2 to 16 pH ORP 1500 to 1500 mV rH O to 100 rH Temperature Pt1000 30 to 140 C Pt100 30 to 140 C 3500 DKK 30 to 140 C 5k1 30 to 140 C 6k8 30 to 140 C PTC10k 30 to 140 C NTC 8k55 10 to 120 C 3kBalco 30 to 140 C C Accuracy pH input lt 0 01 pH ORP input amp 1mV Temperature lt 0 3 C s 0 4 C for Pt100 Step response lt 4 sec for 9096 pH 7 pH 4 Note on performance specifications The following tolerance is added to above performance mA output tolerance 0 02 mA of 4 20 mA D Transmission signals General Output functions Control function Burnout function Hold E Contact outputs General Switch capacity Status Control function Two isolated outputs of 4 20 mA DC with common negative Maximum load 6000 Bi directional HART digital communication superimposed on mA1 4 20 mA signal Linear or Non linear 21 step table output for pH temperature ORP or rH PID control Burn up 21 0 mA or burn down 3 6 mA to signal failure acc NAMUR NE43 Adjustable damping Expire time The mA outputs are frozen to the last fixed value du
4. IM 12B07C05 01E 47 This test is done on the HIF display of Factory Mode Touch the Setup icon Touch the Commissioning Touch the Advanced setup Touch the Factory adjustment Enter a password Select the Factory Mode in Key Select the HIF in Execute Select the Input1 pH in mV input When the standard voltage source to the corresponding value of Simulation input mV in Table 1 is set check the data display and the value must be within the range shown in Table 1 Table 1 Simulation input mV Check Point pH Data Display pH After the above test is completed select the Input1 ORP in mV input When the standard voltage source to the corresponding value of Simulation input mV in Table 2 is set check the data display and the value must be within the range shown in Table 2 Table 2 Simulation input mV Check Point ORP Data Display mV After the above test is completed touch the Exit to return to the HIF display Temperature Indication Check Following Section 3 3 select the PT 1000 in Temperature of the HIF display In this state change the resistance of the decade resistance box and check the data display The value on the data display must be within the range shown in Table 3 Table 3 Resistance O of Decade Resistance Box 960 9 1097 3 1460 6 After the above test is completed touch the Exit to return
5. Above table shows contact output status between common to NO Configure hold Hold is the procedure to set the outputs to a known state when going into commission ing During commissioning HOLD is always enabled outputs will have a fixed or last value During calibration the same HOLD function IM 12B07C05 01E applies For calibration it is up to the user if HOLD is enabled or not gt Delay time Delay time Figure 5 3 Alarm contact on off control controller output 100 e toff gt 0 1 sec Duty cycle Duty cycle ton gt 0 1 sec Duty cycle Figure 5 4 Duty cycle control controller output o 100 Maximum pulse frequency BE 50 leen 50 pulse frequency No pulses Figure 5 5 Pulse frequency control Lifetime contacts One should note that the lifetime of the con tacts is limited 109 When these contacts are used for control pulse frequency or duty cycle with small interval times the lifetime of these contact should be observed On Off control is preferred over Pulse duty cycle AT Output gt A2 Output gt Alarm Alarm gt b Wash Fail Configure Hold PID control S1 PID control S1 P ID control S1 PI D control S1 P I D control S1 Duty cycle Pulse freq MA1 simulate Alarm S1 Alarm S2 Alarm Alarm Hold Hold Output setup S1 control rocess parameter P control gt ontrol type Duty cycle gt xpiry
6. Shield of no 15 Shield of no 15 Shield of no 15 Shield of no 15 Shield of no 13 Shield of no 13 Shield of no 13 Shield of no 13 Note Secondary value is always temperature For combined pH and Redox measurement pH is the primary value and Redox the tertiary value For ORP measurement temperature is not required for automatic temperature compensation IM 12B07C05 01E ONIYIM ANY NOILVTIVLSNI H pH transmitter 11 Temperature 12 Temperature 13 Reference 14 Solution ground d 15 Glass measure L 16 Shield j 17 Shield Cable markers Separate electrodes for pH measurement o 11 Temperature o 12 Temperature SUS 13 Reference Plack 14 Solution ground 15 Glass measure o 16 Shield i 17 Shield Cable markers Combined glass reference electrode for pH measurement 011 Temperature Temperature Reference Metal ORP sensor Glass measure Shield e Shield 2 Cable Markers The blue cable can also be disconnected Separate electrodes for pH and Redox ORP rH measurement PH ORP S NNSISGYWOSN Temperature Temperature Reference Solution ground 7 Glass measure Shield 7 FU20 four in one sensor for pH measurement Note Connect cables to similaly marked terminals 11 to 11 12 to 12 etc This configuration also enables combined pH ORP measurements Temperature Temperature Reference red
7. the TAG is pre programmed with the specified tagnumber Passwords Calibration and Commissioning may be sepa rately protected by a password By default both passwords are empty Entering an empty pass word 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 0 15 IM 12B07C05 01E FACTORY ADJUSTMENT This menu is for service engineers only This section is protected by a password Attempting to change data in the factory adjust ment menu without the proper instructions and equipment can result in corruption of the instrument setup and will impair the perform ance of the unit After defaults are loaded the nstrument will reset ag JEXAxt PH450 Passwords ntering an empty password Advanced setup esults in disabling the pass Date time 2002 10 15 15 16 49 Factory adjustment 24 hours etwork address 0 ode 5945430840xxxxxx nter your password _ Parameter Default values Network address 0 fixed f
8. Adapter Figure 3 5c Conduit adapter FRONT GLANDS 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 cor rect for the specifications of the EXAxt and that the supply agrees with the voltage specified on the textplate A DANGER Install an external switch or circuit breaker to the power supply of the converter Packing G1 2 screw AFTG 1 2 NPT screw ANSI M20 screw AM20 Contact output Unit mm inch REAR GLANDS ONIYIM ANY NOILVTIVLSNI H ag LADA LADA LADA The external switch or circuit breaker should be installed within reach of the operator and identified with marking as a power supply switch to the converter Power lines such as power cables and contact outputs should be fixed securely onto a wall or construction using cable racks conduit tubing nylon bands or other appropriate ways Accidental removal from terminals by pulling may result in electric shock 2 Use an external switch or circuit breaker rated 5A and conforming to IEC 60947 1 or IEC 60947 3 3 Itis recommended that the external switch or circuit breaker be installed in the same room as the converter Local health and safety regulations may require an external circuit breaker to be installed The instrument is protected internally by a fuse The
9. In this setup it is also possible to measure rH ORP Note For best results a Liquid Earth is connected to terminal 14 If there is no LE terminal 13 and 14 are shortcutted and no sensor diagnostics are possible This setting determines the menu structure thoughout the instrument 5 2 Measurement setup Measurement which process values This setting determines will be available for monitoring and control 5 3 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 sensors Unit Celcius or Fahrenheit temperature scales can be selected to suit the user s preference Manual temp reference temp temp coef ficient and temp ranges in the matrix are re calculated automatically to the new unit IM 12B07C05 01E 5 4 Temperature compensation Two types of methods can be used here Automatic when a temperature element is used Select one of the Temp elements used The other is a manual set temperature which represent the temperature of the process The latter is used when temperature measurement is difficult and temperatures do not vary much Reference Temperature Choose a temperature to which the measured pH value must be compensated Normally 25 C is used therefore this temperatu
10. Notice e This manual should be passed on to the end user e The contents of this manual are subject to change without prior notice e The contents of this manual shall not be reproduced or copied in part or in whole without permission This manual explains the functions contained in this product but does not warrant that they are suitable the particular purpose of the user Every effort has been made to ensure accuracy in the preparation of this manual However when you realize mistaken expressions or omissions please contact the nearest Yokogawa Electric representative or sales office his manual does not cover the special specifications This manual may be left unchanged on any change of specification construction or parts when the change does not affect the functions or performance of the product e If the product is not used in a manner specified in this manual the safety of this product may be impaired 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 Improper operation by the user Use of the instrument in improper applications Use of the instrument in an improper environment or improper utility program Repair or modification of the related instrument by an engineer not authorized by Yokogawa Safety and Modification Precautions Follow the safety precautions in this manual when usin
11. ORP Hr Zoom Zoom sensor Zoom outputs Zoom device Logbook Output data Settings MAI mA2 S1 2 3 S4 Level 3 menu Zero Slope Sensor mV ORP Zero ORP Slope ORP Sensor mV RH Zero RH Slope RH Sensor mV impedance 1 impedance 2 Level 2 menu mA1 value mA2 value S1 perc 92 perc S3 perc 94 perc Serial number Note Software Revision Device Revision DD Revision Sensor data Calibration Sensor Pred Maint Note A part of the HART device ID descriptor IM 12B07C05 01E Level 4 menu Level 2 menu Level 1 menu Online menu Most appl Error Calib Wash Hold Hold Instrument Hold Outputs Hold Off 53 Level 3 menu Level 4 menu Error description remedy pH 1pt Calibration ORP 1pt Calibration rH 1pt Calibration pH Sample Calib ORP Sample Calib rH Sample Calib Temp Calibration Manual Wash Measurement setup Meas type Temp settings Temp compensation Calib settings Temp sensor Temp unit Temp comp Man value Ref temp Comp method TC ORP comp method ORP TC Zero unit Slope unit Zero Slope units Zero hi lim Zero lo lim Slope hi lim Slope lo lim ORP Zero hi lim ORP Zero lo lim ORP Slope hi lim ORP Slope lo lim rH Zero hi lim rH Zero lo lim rH Slope hi lim rH Slope lo lim Stab time Cal int Limits and timing soos IM 12B07C05 01E 54 Level 2 menu Level 1 m
12. Panel mounting using optional brackets Surface mounting on a plate using bolts from the back Wall mounting on a bracket for example on a solid wall Pipe mounting using a bracket on a horizontal or vertical pipe Size nominal 50A Unit mm inch Hood Option code H5 some cutout on the left side cover cable gland When shipped not installed For output signal For contact input For sensor cable B C D E F e LJ Grounding terminal M4 screw moov gt 121 5 4 78 For power supply For contact output S1 and S2 For contact output S3 and S4 Adapter for Conduit Work optional option code AFTG ANSI AM20 O TTM Lee eech 49 Approx 1 93 55 2 2 G1 2 screw AFTG _ 1 2 NPT screw ANSI M20 screw AM20 Figure 3 1 Housing dimensions and layout of glands IM 12B07C05 01E ONIYIM ANY NOILVTIVLSNI H Unit mm inch min 185 7 25 Figure 3 2 Option PM panel mounting diagram Note When option code UM is specified universal pipe wall panel mounting kit are supplied same as option code U and PM both specified wall mounting pipe mounting pipe mounting vertical horizontal res SN ND pipe Figure 3 3 Option U wall and pipe mounting diagram IM 12B07C05 01E 11 TEMPERATURE 12 TEMPERATURE 13 REFERENCE 14 SOLUTION GRO
13. fuse rating is dependent on the supply to the instrument The 250 VAC fuses should be of the time lag type conforming to IEC127 IM 12B07C05 01E AN 10 AN WARNING Fuse replacement should be performed only by a gualified service personnel See Sec 7 MAINTENANCE Fuse Fuse ratings Power supply Fuse type 12 24 VDC 10W max 2A 250V Slow 100 240 VAC 15VA max 0 5A 250V Slow 3 3 2 Access to terminal and cable entry Terminals 1 and 2 are used for the power sup ply Guide the power cables through the gland closed to the power supply terminals The ter minals will accept wires of 2 5 mm 14 AWG Always use cable finishings if possible 32 31 33 42 41 43 NC E NO NC C NO mA1 HART mA OUTPUTS REFER TO INSTRUCTION MANUAL FOR CONNECTIONS CONTACT 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 must 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 N DANGER The minimum cross sectional area of the pro tective grounding wire should be 0 75 mm2 IM 12B07C05 01E 3 3 3 AC power Connect terminal L to the phase line of the AC power and terminal N to the zero line See fig ure 3 8 for the power ground This is separated f
14. other screens are deactivated by pressing the The interval time and wash time are reversed Note Recovery time is intended to let the wash flag once or twice The wash cycle has two time intervals Ty and Tg and depending on the moment of pressing the wash flag the current interval is ended see fig 6 1 sensor system recover to Normal process conditions Interval time ended Measuring Recovery Mode Figure 6 1 Wash cycle Manual wash When enabled in the generic wash settings wash cycles can be activated manually via the user interface Calibration Wash gt gt Start manual wash cycle or via an input contact if provided for Continuous wash during sample hold meas urement Some processes scale the electrodes in such a way that the electrodes need continuous wash in order to keep on performing well In this configuration a recovery time and a interval time interrupt the continuous wash cleaning The continuous wash cycle is started the moment Continuous wash is enabled First with measuring mode which has the duration of wash time followed by the wash mode which has the duration of interval time IM 12B07C05 01E The wash cycle is terminated the same way as described above pressing the wash flag in the main display once or twice When the cycle is terminated Continuous wash should be re enabled to start the wash cycle Note When this
15. overshoot settling time and the time necessary to cancel the effects of static loading process changes The integral term is provided with an anti windup function When the output of PI portion of the controller is outside the control range less than 5 or greater than 105 the I part is frozen Derivative control Z Process Controller The control acts on the slope rate of change of the process value thereby minimizing overshoot It provides rate feedback resulting in more damping High derivative gains can increase the rising time and settling time It is difficult to realize in practice because differen tiation leads to noisy signals 29 ion TEMPERATURE ORP RH Pl control gt ba PID control xpiry time 0 0 s i 0 s disabled 4 d Low High MAI output rocess parameter PH rocess parameter PH Setup P control gt Off PID control mA1 Direct Reverse TEMPERATURE Linear MAI 0 value 0 00 pH 00 value 14 00 pH Linear gt Table mAI lear table No action heck values No action A Enter values t o mA2 similar structure to mA1 4 Configure Hold Parameter Default values MAI control Expire time 0 0 sec 1800 sec mA1 output Damping time 0 0 sec 3600 sec mA1 simulate Simulation perc 50 Yo 100 P ID control mA1 Setpoint 7 pH inf P ID control mA2 Setpoint 25 C F inf P ID control mA1
16. sensor ZERO can also be displayed in pH units and then it represents the pH value where the sensor output is 0 mV at 25 C Go to Com missioning gt gt Measurement gt gt Calibration Settings gt gt Zero and Slope Units 4 3 4 Slope calibrated efficiency of the sensor unit in percentage of theoretical slope of the sensor unit The theoretical slope follows the NERNST equation and is 59 16 mV pH The SLOPE can be calibrated only after a two point calibration in buffer solutions with a different pH value A low slope indicates that the sensor is not clean or it indicates a bad sensor If the calibrated slope exceeds the range 70 110 or user defined limits then the calibration is rejected and a error message is shown The SLOPE can also be displayed as mV pH value at 25 C if the user has defined this variable as mV pH in Commissioning zz Measurement gt gt Calibration Settings gt gt Zero and Slope Units 4 3 5 Sensor mV the output of the sensor unit prior to calibra tion and temperature compensation This value is important for trouble shooting 4 3 6 Reference impedance the electrical resistance of the liquid junc tion The liquid junction forms the electolytical contact between the reference element and the measuring electrode so it must be kept clean and filled with conductive electrolyte Otherwise the measurement will suffer from instability drift and measuring errors The elec trical impedance i
17. 02E revised to 2nd edition because Part No for option codes U PM H5 AFTG ANSI AM20 added 4th Mar 2012 Revisions PREFACE Addition of How to dispose the batteries p3 to 4 Some revision of N Safety and EMC conforming standards description for EMC revised p19 HART communication mark added to Figure 4 1 p44 Section 7 3 Contrast adjustment changed to LCD adjustment some caution added Customer Maintenance Parts List CMPL 12B07C05 02E revised to 4th Edition some of illustration changed User s Model PH450G Style S2 Supplement Manual pH and ORP Converter Mee Thank you for selecting Model PH450G Style S2 pH and ORP Converter The user s manual IM 12B07C05 01E 4th edition supplied with the product has been amended as follows please replace the corresponding pages in your copy with the attached revised pages Revisions Page 2 to 3 Some spell error corrections and addtion of specification description Page 5 to 6 Some revision of Figure 3 1 and Figure 3 3 addtion of M6 screw position for wall mounting Page 15 Some revision of Figure 3 10c Page 24 Addition of description about a sensor exchange Page 41 How to check the ORP electrode added to subsection 6 6 Page 46 to 49 QIS 12B07C05 01E QIC 12B07C05 01 revised some change of insulation amp dielectric strength test Page 58 Appendix 5 ORP Electrode Check added CMPL 12B07C05 02E Some revision of P N item 2
18. 24 V DC Acceptable range 10 8 to 26 4 V DC Power Consumption 10 W Safety and EMC conforming standards C 1 EN 61010 1 RER CSA C22 2 No 61010 1 UL 61010 1 FM3611 Class I Div 2 Group ABCD T6 for Ta 20 to 55 C EN 61326 1 Class A Table 2 For use in industrial locations EN 61326 2 3 EN 61000 3 2 Class A EN 61000 3 3 Korea Electromagnetic Conformity Standard Installation altitude 2000 m or less Category based on IEC 61010 Il Note Pollution degree based on IEC 61010 2 Note Note Installation category called over voltage category specifies impulse withstand voltage Category II is for electrical equipment Pollution degree indicates the degree of existence of solid liquid gas or other inclusions which may reduce dielectric strength Degree 2 is the normal indoor environment IM 12B07C05 01E SNOI LVOIJIO3dS TWYANAD H A AN CAUTION This instrument is a Class A product and it is designed for use in the industrial environment Please use this instrument in the industrial environment only O Environment and operational conditions Ambient temperature 20 to 55 C 5 130 F Storage temperature 30 to 70 C 20 160 F Humidity 10 to 90 at 40 C 100 F 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
19. 9 23 9 18 9 14 9 10 9 07 9 04 9 01 8 99 8 96 8 94 8 92 8 90 889 The freely programmable table is populated with a basic set of data to provide a start for the user configuration This table is intended for the user to be able to choose his buffer solutions to suit his own preference The data concerning the pH temperature characteristic will need to be obtained from the supplier of the buffers Note Yokogawa recommend the use of NIST primary buffer standards rather than buffers which have been adjusted by the addition of acid or alkaline materials to the buffer composition In this way the customer gets a recognized standard as well as the best buffer capacity the ability to resist pH change with contamination Defaults for matrix temperature compensation Tref T1 T2 T3 T4 T5 25 0 25 0 45 0 0 0 Solution 1 6 40 pH 6 42 6 40 pH 6 34 pH 6 23 pH 6 11 pH Solution 2 7 00 pH 7 38 pH 7 00 pH 6 70 pH 6 45 pH 6 25 pH Solution 3 7 30 pH 7 94 pH 7 30 pH 6 86 pH 6 54 pH 6 31 pH Solution 4 7 60 pH 8 31 pH 7 60 pH 7 06 pH 6 67 pH 6 40 pH Solution 5 9 00 pH 9 74 pH 9 00 pH 8 40 pH 7 91 pH 7 51 pH Defaults for mA output table 9 10 45 20 2 40 4 1 7 1 pH 0007 14 21 28 35 42 49 56 63 70 77 84 91 98 105 112 119 126 133 140 IM 12B07C05 01E soos 52 Appendix 2 HART HHT 275 375 menu structure Level 1 menu Online menu Process values Primary value pH Secondary value Temp Tertiary value
20. The rate of electrolyte consumption will again be process dependent so experience will show how often you must refill Pressurized systems need to be regularly checked to ensure that the pres sure is adequate Periodic re calibration of the sensor system is necessary to ensure best accuracy This takes into account the aging of the sensors and the non recoverable changes that take place These processes are slow however If frequent re calibration is needed it is usually because the cleaning technique is not effec tive the calibration is not well executed or the pH readings are temperature dependent Monthly calibrations should be sufficient for most applications If a film remains on the pH sensor after cleaning or if the reference junction is partly plugged measuring errors can be interpreted as a need for re calibration Because these changes are reversible with correct cleaning or adjustment of the electrolyte flow through the junction make sure that these items are correct before re calibrating the system IM 12B07C05 01E 7 3 LCD adjustment Contrast adjustment During the life of the analyzer the contrast of the display may fade The contrast can be ad justed using the potentiometer on the backside of the LCD board This adjustment must be done only by Yokogawa s service personnel The position is shown on the picture below For units manufactured after July 2007 the potentiometer is placed behind the little hol
21. Zero aspot Slope sensitivity ITP values can be entered directly in this section These data can be provided by the manufacturer of the probe or by the users laboratory etc They are determined independently of the measuring loop JN Note itis not necessary to enter this data In most cases as the EXAxt automatically does this while performing a calibration The feature is used in the case of special electrode systems and where calibration in the process environment is not possible See chapter 6 5 6 Impedance setting Reference impedance High Low The EXAxt has an impedance check capable of moni toring the impedance of all sorts of sensor systems In order to fine tune this diagnostic tool it is necessary to set it up to match the sensors used The system is set to measure the impedance of Glass high and reference low electrodes In applications that have a tendency to leave deposits on the electrodes and to clog the reference sensor junction there is the possibility to use the impedance check set error configu ration on the reference sensor to initiate an alarm or to initiate the wash cleaning process when one of the limits is exceeded Measurement setup easurement pH ORP Temperature settings Temp compensation Calibration settings Impedance settings Calibration pH settings ORP settings Calibration pH 7 Zero and Slope units Limits and timing Buffers select set Zer
22. and the reference is con nected to terminal 13 Only Redox needs to be measured The metal is connected to terminal 15 and the reference or glass is connected to terminal 13 pH ORP When pH and ORP are measured simultaneously the glass electrode is connected to terminal 15 and the reference is connected to terminal 13 The metal electrode is connected to terminal 14 In this setup it is also possible to measure rH ORP Note For best results a Liquid Earth is connected to terminal 14 If there is no LE terminal 13 and 14 are shortcutted and no sensor diagnostics are possible This setting determines the menu structure thoughout the instrument If you replace the sensor delete the predictive maintenance log first on the logbook configu ration screen in section 5 12 If you do not proper prediction will not be possible using the sensor diagnostics You can check whether the log has been properly cleared by changing the sensor data to predictive maintenance under Read logbook on the Detail screen of figure 4 3 and then pressing Enter 5 2 Measurement setup Measurement which process values This setting determines will be available for monitoring and control 5 3 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 t
23. contact will remain in the state it is Currently in Wash cycles do not influence other contacts When HOLD is enabled during wash it is HOLD that will set all contacts to NC 3 4 3 Contact input It is necessary to use screening shielding on the input signal cables Terminal 63 is used to connect the shielding 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 IM 12B07C05 01E ONIYIM ANY NOILVTIVLSNI H 12 3 6 Wiring the sensor system 3 6 1 Impedance measurement jumper settings Impedance measurement is a powerful diagnostic tool In order to perform impedance measurements it is important to have a good jumper setting The table and figure below will guide you to make the right setting Note It is important to decide first which application and which settings are appropriate for the installation This decision is best done before the jumpers are installed because the cables will rest on top of the jumpers in their installed positions Table 3 1 Impedance measuring jumpers Fig
24. logbook contact T Hold fixed value rase logbook Calibration Control setpoint sori me selector _ Control range arn if logbook full No off on Manual reset _ l time D time Burn Linear output 96 Damping time Expiry time Contact setup Control setpoint Control range Manual reset l time D time _ Control type DC period time Max pulse freq Alarm setpoint Alarm direction Alarm hysteresis Alarm delay time Expiry time Wash setup selector Sensor Pred Maint all IM 12B07C05 01E 36 5 13 Advanced setup Defaults The functionality of the EXAxt allows to save and load defaults to come to a known instru ment 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 X axis timing Auto return 10 min disabled Tag Passwords Date and time Language The contents of all logbooks HART parameters address tag descriptor message oOo d OO PS Con 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
25. mode when touchscreen is untouched for 10 min Model and Suffix Codes Style S2 Model Suffix code Option code PH450G pH ORP Converter Power A AC version 100 240 VAC D DC version 12 24 VDC Type A General purpose version U FM version Mounting Hardware UM Universal mounting kit panel pipe wall Pipe and wall mounting hardware 2 Panel mounting hardware 2 Hood Awning hood stainless steel 2 Conduit adapter G1 2 2 1 2NPT 2 M20 2 Tag Plate SCT Stainless steel tag plate 1 Notes 1 If the tag number is predefined with the purchase Yokogawa will inscript the tag plate with the specified tag number and program the tag number in the converter 2 Option codes U PM H5 AFTG ANSI and AM20 are not specified for FM version U IM 12B07C05 01E 3 INSTALLATION AND WIRING 3 1 Installation and dimensions 3 1 1 Installation site The EXAxt 450 converter is weatherproof and can be installed inside or outside It should however be installed as close as possible to the sensor to avoid long cable runs between sensor and converter In any case the cable length should not exceed 50 metres 162 feet Select an installation site where Mechanical vibrations and shocks are negligible Norelay power switches are in the direct environment Access is possible to the cable glands see figure 3 1 The converter is not mounted in direct sunlig
26. outputs General Switch capacity Status Control function Wash Hold Fail Transmission signals Two isolated outputs of 4 20 mA DC with common negative Maximum load 6000 Bi directional HART digital communication superimposed on mA1 4 20 mA signal Linear or Non linear 21 step table output for pH temperature ORP or rH PID control Burn up 21 0 mA or burn down 3 6 mA to signal failure acc NAMUR NE43 Adjustable damping Expire time 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 pH ORP rH and temperature Configurable delay time and hysteresis Failure annunciation On Off PID duty cycle or pulsed frequency control Contact can be used to start manual or interval time wash cycles Contact can be used to signal the Hold situation Contact S4 is programmed as fail safe contact Note When contact output current is more than 4 Amps ambient temperature should be less than 40 C IM 12B07C05 01E F Contact input Remote wash cycle start G Temperature compensation Function H Calibration I Logbook J Display K Shipping details Package size Package weight Converter weight L Housing Colour PH450G A D A PH450G A D U Automatic o
27. sensitivity unit Slope can be defined in mV pH or defined as percentage of theoretical slope at 25 C Limits and timing Zero aspot High Low During calibration the new zero is checked for exceeding these low and high limits Narrowing the band will prevent bad calibration procedures and calibration of bad sensors which results in higher accuracy The default values should be adjusted to suit the application and the users criterion Slope sensitivity high low During calibration the new slope is checked for exceeding these low and high limits Narrowing the band will prevent bad calibration procedures and calibration of bad sensors which results in higher accuracy The default values should be adjusted to suit the application and the users criterion IM 12B07C05 01E Stabilization time During calibration the value should be stable within 0 01 pH over this stabilization time pe riod When the pH value is not stable within 10 minutes calibration is aborted Calibration interval The interval in which a new calibration must take place If the interval is exceeded the instrument will give a warning or a fail user definable in error configuration 2 3 Buffers Calibration is done using standard calibration buffers Our preference goes to NIST buffers for highest accuracy but the user is free to select US DIN or define his own The standard buffers can be found in Appendix 1 Zero aspot slope sensitivity ITP
28. 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 8 Contact output setup for functionality descrip tion Alarm limits monitoring Contacts configured as ALARM can be ener gized when limits are crossed Fail Contacts configured as FAIL will be energized when a fail situation occurs Some fail situa tions are automatically signaled by the internal diagnostics electronics of the converter 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 11 4 M4 screw POWER 100 240 VAC 15 VA 50 60Hz FUSE 500 mA 250 VACIT Figure 3 8 b Internal grounding Peer Poweron NO Nam No rat Fatta lam NOT NC NC NC NO NO HOLD NC NC NC NO NC NC NC When a fail situation occurs which is related to the parameter associated with the contact pH ORP rH or temperature the contact will go to NC When the fail situation is not related to the parameter associated with the contact the
29. time 0 0s 0 s disabled rocess parameter PH amp Setup alarm Setpoint Range Manual Reset Lime D time DC period time Max pulse freq Expire time Setpoint Setpoint Hysteresis Delay time Fixed value mA1 Fixed value mA2 PID control S1 Direction ysteresi Delay time xpiry time 0 0 s 0 s disabled ast or fixed ixed value mA1 ixed value m 2 ontact outputs are set to de energized during Hold old during alibration wash Parameter values 7pH 1 00 pH 0 3600 sec 0 sec 10 sec 70 p min 0 0 sec 13 pH high 1 pH low 0 10 pH 0 2 sec 12 MA 12 MA Pl control gt Direction PID control gt Pulse freq ange 1 00 pH proportional band Reverse 3600 s Alarm S1 high 5 0 10 pH 025 Last 12 00 mA Fixed 12 00 m Enabled Enabled Disabled Default min 31 Reverse inf inf 100 3600 sec 60 sec 1800 sec 120 p min 1800 sec inf inf inf 1800 sec 21 mA 21 mA IM 12B07C05 01E ONINOISSIININOO AYNLONHLS NNAW H 32 5 9 Fail A fail contact is energized when a fail situation occurs Fail situations are configured in section 5 10 For SOFT Fails the contact and the dis play on LCD are pulsating For HARD Fails the contact and the display on LCD are energized continuously Only contact S4 is programmed as a fail safe contact This means that contact S4 will be de energize
30. 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 main screen to remove the HOLD The route for HOLD setup is Commissioning gt gt Output setup Configure Hold 6 8 Contact output setup Wash Wash functionality is more than activating the cleaning system Wash can be seen as an inter ruption of the normal measuring mode to clean the electrode system The wash cycle first cleans the sensor system either chemical or mechani cal during wash time Tw Next the sensor system is left to recover during wash recovery time Tg After the sensor system is recovered the wash cycle has ended and converter returns to the normal measuring mode The input contact is always enabled when an output contact is configured as wash The input contact can be used to enable a wash when a high impedance error occurs on the reference electrode Then one wash cycle is started Hold during wash When enabled the mA outputs will be frozen to a pre defined last or fixed value All contacts are de energized except the one s configured as wash contact Disabled mA outputs and contacts will not be affected by wash cycles IM 12B07C05 01E NOIL VH8lITVO 42 Termination of a wash cycle The user can decide to terminate the current wash cycle This is done in the main screen all
31. to the HIF display Temperature C Data Display C Current Output Test Following Section 3 4 select the Check in mA outputs of the HIF display Set value 4 000 mA appears at the bottom of the display Select Next value in the Command and touch Enter the value on the data display increases in steps of 4 mA Check the current outputs 1 and 2 corresponding to the data display the current output must be within the range shown in Table 4 QIS 12B07C05 01E IM 12B07C05 01E NOILOAdSNI m 48 Table 4 Data Display Current Output MA DC 12 0 02 20 0 02 After all tests are completed a Touch the Exit twice to return to the Service display b Select Normal in Key c Touch the Home icon to return to the initial display PH450G POWER Sensor s SUPPLY DC DC Ammeter Ammeter O O O O Decade Resistance POWER Box SUPPLY Standard Voltage Source Figure 1 Testing Circuit and Test Equipment QIS 12B07C05 01E IM 12B07C05 01E MAM PRODUCT NAME RA MODEL F ACNo ORDER NO INSULATION RESISTANCE DIELECTRIC STRENGTH PA mz SENSOR INPUT INDICATION im ERT TEMPERATURE INDICATION HA Bit CURRENT OUTPUT Af DATE REA INSPECTOR K d x TEST CERTIFICATE 448 stpH ORP thes 4 WIRE pH ORP CONVERTER PH450G RAIA INS
32. 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 This 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 converter using the EXAxt Configura tor software package which can be download ed from the Yokogawa Europe website IM 12B07C05 01E Flashing Fail flag in main display Flashing Warn flag in main display 35 1 8 bH too high pH too low emperature too high Errors eis emperature too low atrix config error Fail alib time exceeded Off ash half time error Off Errors 3 3 Impedance 1toolow Warn Impedance 2 too high Warn Impedance 2 too low Off Next Sensor logbook Error on Error off T C Zer gt T C Zero low limit Zero high limit Slope low limit Slope high limit Stabilization time Imp 1 low limit Imp 1 high limit Imp 2 low limit Imp 2 high limit ress uem and use the selector off on ONINOISSIININOO AYNLONHLS NNAW H SIS SSI SIS ISI SI Configure logbook 7 Sensor logbook Settings logbook mA Settings
33. transparent Glass measure black coax Shield Solution ground Retractable sensor assembly PR20 Also PD20 PF20 amp PS20 Note Connect cables to similaly marked terminals 11 to 11 12 to 12 etc Temperature Temperature Reference Solution ground Glass measure J Shield FU20 four in one sensor for pH and Redox measurement Note Connect cables to similaly marked terminals 11 to 11 12 to 12 etc This configuration also enables combined pH ORP measurements Figure 3 10 b Sensor wiring for combined pH Redox measurement Hy Ll II Uv I Comb ORP Comb Comb PH REF ORP REF PH ORP EF Liquid PH Earth IM 12B07C05 01E 11 TEMPERATURE 12 TEMPERATURE 13 REFERENCE 14 SOLUTION GROUND 15 METAL MEASURE 16 SHIELD 17 SHIELD 7 O 41 TEMPERATURE 0 12 TEMPERATURE REFERENCE SOLUTION GROUND METAL MEASURE SHIELD SHIELD 7 Cable Markers Cable Markers Separate electrodes for ORP Combined metal reference electrode measurements for ORP measurement O 11 TEMPERATURE O 11 TEMPERATURE O 12 TEMPERATURE O 12 TEMPERATURE REFERENCE SOLUTION GROUND PRP METAL SHIELD d O13 REFERENCE i O14 SOLUTION GROUND ORP 015 METAL O16 SHIELD O 17 SHIELD ONIYIM ANY NOILVTIVLSNI H SNNN DONOR FU20 four in one sensor for FU20 four in one sensor for ORP measurement ORP measurement GLASS SOLUTION GROUND METAL SHIELD SHIELD Ca
34. values corrected p27 parameter values corrected p29 parameter values corrected p31 made some revisions p43 some CAUTION of the touchscreen added p45 to p48 Sec 9 QUALITY INSPECTION inserted p49 Sec 10 SPARE PARTS section and page moved p50 to p56 APPENDICES page moved p51 note of serial number added p56 APPENDIX 4 Control drawing for FM approval added CMPL 12B07C05 02E 1st Edition made some revisions 3rd Aug 2008 Revisions Back side of cover note illustration added p2 Description of hold contact outputs changed p3 Japanese added to display language p4 option codes U PM H5 AFTG ANSI AM20 added to Model and codes p5 to 6 Layout changed Figure 3 1 moved and changed because external dimensions for awning hood H5 conduit adapter AFTG ANSI AM20 added p7 Figure 3 4 title modified p8 conduit adapter work added to subsection 3 2 2 p9 to 11 Layout changed descriptions after conduit adapter work moved p12 Description changed for subsection 3 6 1 Impedance measurement jumper settings p13 some error corrected p14 some error corrected p20 Subsection 4 3 10 Projected replacement description corrected p21 Subsection 4 3 11 Serial number gt HART ID changed p24 to 39 Layout changed illustration of submenu screen placed on appropriate page p41 some error corrected p47 some error corrected p55 Note of HART protocol DD files URL added Customer Maintenance Parts List CMPL 12B07C05
35. 0 x 240 pixels LCD with LED backlight and touchscreen Plain language messages in English German French Spanish Italian Swedish Portuguese and Japanese 290 x 300 x 290 mm L x W x D 11 5 x 11 8 x 11 5 inch Approx 2 5 kg 5 5 Ibs Approx 1 5 kg Cast aluminum housing with chemically resistant coating Polycarbonate cover with Polycarbonate flexible window Protection IP66 NEMA 4X CSA Type 3S Silver grey IP66 cable glands are supplied with the unit NEMA 4X close up 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 Optional conduit adapter Power supply PH450G A PH450G D N Safety EMC G1 2 1 2NPT or M20 female Ratings 100 240 V AC Acceptable range 90 to 264 V AC Ratings 50 60 Hz Acceptable range 50 Hz 5 60 Hz 5 Power Consumption 15 VA Ratings 12 24 V DC Acceptable range 10 8 to 26 4 V DC Power Consumption 10 W Safety and EMC conforming standards EN 61010 1 LE C N200 CSA C22 2 No 61010 1 UL 61010 1 FM3611 Class I Div 2 Group ABCD T6 for Ta 20 to 55 C EN 61326 1 Class A Table 2 For use in industrial locations 1 EN 61326 2 3 EN 61000 3 2 Class A EN 61000 3 3 Korea Electromagnetic Conformity Standard 1 Influence of immunity environment Criteria A Output shift is specified within 35 of F S Installation altitude 20
36. 00 m or less Category based on IEC 61010 II Note Pollution degree based on IEC 61010 2 Note Note Installation category called over voltage category specifies impulse withstand voltage Category Il is for electrical equipment Pollution degree indicates the degree of existence of solid liquid gas or other inclusions which may reduce dielectric strength Degree 2 is the normal indoor environment IM 12B07C05 01E SNOI LVOIJIO3dS TWYANAD z 3 INSTALLATION AND WIRING 3 1 Installation and dimensions 3 1 1 Installation site The EXAxt 450 converter is weatherproof and can be installed inside or outside It should however be installed as close as possible to the sensor to avoid long cable runs between sensor and converter In any case the cable length should not exceed 50 metres 162 feet Select an installation site where Mechanical vibrations and shocks are negligible Norelay power switches are in the direct environment Access is possible to the cable glands see figure 3 1 The converter is not mounted in direct sunlight or severe weather conditions Maintenance procedures are possible avoiding corrosive environments The ambient temperature and humidity of the installation environment must be within the limits of the instrument specifications See chapter 2 3 1 2 Mounting methods Refer to figures 3 2 and 3 3 Note that the EXAxt converter has universal mounting capa bilities
37. 19267 US Free programmable 9 pH 0 mV 0 pH 110 100 30 sec 250 days Zero high Zero high Slope high Slope high 14 pH 1000000 O 1000000 O IM 12B07C05 01E ONINOISSIININOO AYNLONHLS NNAW H 28 5 7 mA output setup The general procedure is to first define the function control output simulate off of the output and second the process parameter as sociated to the output Available process parameters depend on se lected sensor type and measurement setup Off When an output is set off the output is not used and will give an output of 4 mA A selection of P PI or PID control Static output required to maintain equilibrium state with setpoint Direct If the process variable is too high relative to the SP the output of the controller is increased direct action Reverse If the process variable is too high relative to the SP the output of the controller is decreased reverse action Linear or non linear table output The table function allows the configuration of an output curve by 21 steps 5 intervals In the main menu concentration can be selected to set the concentration range Percentage of output span Normal span of outputs are limited from 3 8 to 20 5 MA Control Manual reset Direction Output Simulate 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 un
38. 40 Eo 20 29 30 35 8 40 45 50 2 60 0 80 20 925 1 68 pH 1 668 1 670 1 672 1 675 1 679 1 683 1 688 1 691 1 694 1 700 1 707 1 715 1 723 1 743 1 766 1 792 1 806 4 01pH 4 003 3 999 3 998 3 999 4 002 4 008 4 015 4 024 4 030 4 035 4 047 4 060 4 075 4 091 4 126 4 164 4 205 4 227 6 87 pH 6 984 6 951 6 923 6 900 6 881 6 865 6 853 6 844 6 840 6 838 6 834 6 833 6 834 6 836 6 845 6 859 6 877 6 886 9 18 pH 9 464 9 395 9 332 9 276 9 225 9 180 9 139 9 102 9 081 9 068 9 038 9 011 8 985 8 962 8 921 8 885 8 850 8 833 DIN 19267 German buffers so called technical buffer solutions Oo 25 30 40 20 60 70 830 930 4 65pHDIN 4 670 4660 4 650 4650 4650 4660 4680 4700 4720 4750 4790 6 79pHDIN 6 890 6 840 6 800 6 790 6 780 6 760 6 760 6 760 6 760 6 780 6 800 9 23 pH DIN 9480 9370 9270 9230 9 180 9090 9 000 8920 8 880 8850 8 820 US technical buffers PE MANA 1 0 BA 192025 gt DE 40pHUS 4 000 3 998 3 997 3 998 4 001 4 005 4 001 4018 4 027 4 038 4 050 4 064 4 080 ZOpHUS 7 120 7 090 7 060 7 040 7 020 7 000 6 990 6 980 6 988 6 978 6 970 6 890 6 980 10 0 pHUS 10 317 10 245 10 179 10 118 10 062 10 012 9 966 9 926 9 889 9 856 9 828 9 828 9 828 FREE PROGRAMMABLE Default settings based on rounded NIST values 1 15 20 2 4 4 10 7 buffer4 4 00 4 00 4 00 4 00 4 00 401 402 4 02 404 4 05 406 408 409 411 4 13 4 15 4 16 buffer7 6 98 6 95 6 92 6 90 6 88 6 87 6 85 6 84 6 84 6 83 6 83 6 83 6 84 6 84 6 85 6 85 6 86 buffer 9 9 46 9 40 9 33 9 28
39. 7C05 02E Revision ROC db T I S i IM 12B07C05 01E vi 1 INTRODUCTION AND GENERAL DESCRIPTION The Yokogawa EXAxt PH450G is a converter designed for industrial process monitoring meas urement 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 converter if these instructions are not followed 1 1 Instrument check Upon delivery unpack the instrument care fully 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 side of the instrument agrees with your order Example of the nameplate is shown below KCC REM IG YHQ EEN257 C PH ORP TRANSMITTER MODEL PH450G SUFFIX SUPPLY OUTPUTS AMB TEMP STYLE NO 4 20mA mA1 HART 20 to 55 C NI CL I DIV 2 GROUPS ABCD T6 FOR Ta 20 to 55 C SEE INSTRUCTION MANUAL APPROVED TYPE 4X SEE CONTROL DRAWING NFM016 A9 P 1 e YOKOGAWA us Made in Japan Crm O CC Figure 1 1 Nameplate Note The nameplate will also conta
40. A solution of known ORP Oxygen Reduction Potential is used Usually quinhydrone or ferric chloride solution is used as the test solution Yokogawa sells the following chemicals for making test solution The procedure for mixing solution is described below Quinhydrone salts P N K9024EC and Ferrous amp Ferric salts P N K9024ED Procedure for ORP Electrode Test You determine whether or not the ORP sen sor is normal by measuring the ORP of a test solution of known ORP and determining if the measured value is within tolerance Before starting normal operation when you need to check if the ORP sensor is normal or not use the procedure below A solution of known ORP is measured to check if the measured value is within tolerance Here we describe how to mix test solutions using the quinhydrone salts supplied with the OR8AX accessory kit or the ferrous salts that are sold separately by Yokogawa 1 Mix test solution To mix quinhydrone test solution Pour one packet of quinhydrone into a wide mouth 250 ml beaker and dissolve in pure water to make 250 ml of solution If the pure water is cold the powder will not completely dissolve and some may float on the surface but this will not cause any problems in practice To mix ferrous amp ferric chloride test solution Pour one packet of the light purple or light green powder to a wide mouth 250 ml beaker and add a 2 mol l solution of sulfuric acid to make 250 ml of solutio
41. Coaxial the ones with separate cables To connect sensors with fixed cables simply e Red to measuring element match the terminal numbers in the instrument with Blue to screen shield the identification numbers on the cable ends The triaxial cable has three connections it has The separate sensors and cables are not num an extra white wire termination these wires are bered but instead use a color coding system connected The electrodes have a colored band incorpo rated in the label on the connection cap e Red for measuring electrodes both pH and ORP Yellow for reference electrodes e Blue for combined sensors with both measuring and reference elements in the same body Triaxial Green for temperature sensors e Red to measuring element e Blue to reference The recommended procedure is to color code e White to screen shield each end of the cables to match the sensors with the color strips provided with each cable To connect the other sensor systems follow the This provides a quick way to identify the ends general pattern of the terminal connections as of the cables belonging to a particular sensor listed below when they are installed Single Measurement pH or Redox Combined measurement pH and Redox DEI pH ORP pH and ORP pH and rH 11 Temperature 1 Temperature 1 Temperature 1 Temperature 2 Temperature 2 Temperature 2 Reference Reference Reference Reference Liguid Earth Liguid Earth ORP ORP pH ORP pH pH
42. MORE 500V DC ta BH INSPECTION ITEM f E RESULT MEE Emin F 1 2 f HARE Bed in r DIELECTRIC f Him 31 32 33 41 42 43 51 52 53 71 72 73 Fhe 1400V AC 2P f STRENGTH BETWEEN POWER SUPPLY TERMINALS 1 2 AND PROTECTIVE EARTH TERMINAL BETWEEN CONTACTS TERMINALS 31 32 33 41 42 43 51 52 53 71 72 73 AND PROTECTIVE EARTH TERMINAL 1400V AC 2sec Eir 7138 F 61 62 65 66 E F i 500V AC 2 f BETWEEN CURRENT OUTPUT TERMINALS 61 62 65 66 AND PROTECTIVE EARTH TERMINAL 500V AC 2sec PAS SENSOR SST INDICATION pH INPUT INDICATION R INDICATION mV HEE FSE SBS REFERENCE ACCURACY ACTUAL 1500 1500 HP O 0 XJP amp t A 150 II J ime Ra TEMPERATURE ik gui SS m INDICATION C INDICATION RESISTANCE RE FSE SBS Q REFERENCE ACCURACY ACTUAL 960 9 1097 3 1460 6 HI E ERE 0 02mA DC ACCURACY 0 02mA DC CURRENT R 71 OUTPUTI mA DC 72 OUTPUT2 mA DC REFERENCE ACTUAL ERROR REFERENCE ACTUAL DE SEH SO AO KEE EE Oooo J S S R k pp 20 Aft SA me MS DATE AMBIENT TEMP amp HUM KAA ARE INSPECTOR APPROVED BY YOKOGAWA 9 QIC 12B07C05 01 Ed2 Sep 2013 IM 12B07C05 01E NOILOAdSNI m 58 Appendix 5 ORP Electrode Check To determine whether the ORP electrode is normal or not a solution of known ORP is measured to check if the measured value is within tolerance see Fig app 1 This is done in measurement mode ORP Electrode test solution
43. NENNEN nnn nnn nnn nhan 24 SS SEE piloni 24 5 2 Measurement SEP sonia kakak nina ae Bebas 24 9 3 Temp raiure e en OD i i 24 5 4 Temperature compensation EEN 24 9 9 Calibration SC WINGS S seipsa eon im n aan n i iaai aiaeei 26 945 Impedance Settllig BEE 26 ST 2 Teo Se WI E 28 FET NN 30 34 FTA TI 32 ARESE FR AAA E 32 SL Bro CON NG atO mt 34 5 12 bogbook CONTIQUIEAUON oo ai 34 SAS OVE 21518 Do RR Rm 36 SB 38 6 CALIBRA ON E A 40 6 1 Calibration check with buffer solutions i 40 6 2 Manual calibration mode E 40 6 3 Automatic calibration Mode reina 40 6 4 Sample calibration n en 41 6 5 Temperature Calibratori 41 6 6 ORP amp rH Ab Ne 41 6 7 Operation of hold function during calibration 41 EA ENN eran 41 S i MANENGEN 43 7 1 Periodic un Ener 43 7 2 Periodic maintenance of the Sensor ii 43 TE DE TU UTI 44 IM 12B07C05 01E 8 TROUBLESHDOOTING dicci 45 EN 45 Ge EEE 45 8 3 Predictive ne EE 45 6 4 Error displays e Eer d 45 T OUALCHY INSPECTION EE 46 t0 SFARE PARTS EE 50 APPENDICES E 51 Appendix 1 Buffer 9 E 51 Appendix 2 HART HHT 275 375 menu structure Woo Jaa 52 Appendix 3 Temperature compensation matrix Woo Woo 56 Appendix 4 Control drawing for FM approval Woo Wo Woo Wah 57 Customer Maintenance Parts List for Style S2 CMPL 12B0
44. O 12 00 8 00 CFNext Scroll choices grey means deactivated Enter selected data pH Zero 0 000 mV or choice Slope 100 0 Sensor 0 000 mV First zoom screen gives you inside into the parameters involving current 2100 0 k 4 10 0 ki Impedance 1 Impedance 2 cF Next measurement All following zoom screens give additional information about the device and lead to logbook data ead logbook Sensor data Calibration Output data m i Figure 4 3 Detail screen 4 3 1 Actual mA1 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 Commissioning gt gt 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 Commissioning gt gt output setup gt gt mA2 4 3 3 Zero calibrated sensor offset in mV Theoretically the sensor reads 0 mV in a buffer solution with the same pH value as the Isopotential pH value IM 12B07C05 01E O90StHd IXVX4 JO NOIL VH3dO H 20 of the sensor default 7 00 pH The ZERO value indicates the condition of the sensor If the value exceeds 120 mV or user defined limits an error message is displayed after calibration and the calibration is rejected The trend of ZERO drift during the lifetime of the sensor is used to predict the lifetime of the
45. PECTION ITEM t APPEARANCE T m TE ENTIS st tir 32 33 42 43 52 53 72 73 Im amp GRRE HE Hi fe S V EH Aimy 62 ERE FE th BETWEEN POWER SUPPLY TERMINALS 1 2 AND PROTECTIVE EARTH TERMINAL BETWEEN CONTACTS TERMINALS 32 33 42 43 52 53 72 73 AND PROTECTIVE EARTH TERMINAL stars SERIAL NO 100M Q LIE 500V DC BETWEEN CURRENT OUTPUT TERMINALS 62 AND PROTECTIVE EARTH TERMINAL 100M Q O San HRF 32 33 42 43 52 53 72 1338 T ERE HE bi BETWEEN POWER SUPPLY TERMINALS 1 2 AND PROTECTIVE EARTH TERMINAL BETWEEN CONTACTS TERMINALS 32 33 42 43 52 53 72 73 AND PROTECTIVE EARTH TERMINAL R MORE 500V DC 1390V AC 2 b i 1390V AC Zei E a Hi 7 Ah AH Hm BETWEEN CURRENT OUTPUT TERMINALS 62 AND PROTECTIVE EARTH TERMINAL EIE RESISTANCE Q EE ET 500V AC 2sec ZR c V HSE ACCURACY Felt INDICATION C Tess ACCURACY RAE ACTUAL 49 f S RESULT Bee i 1097 3 LA 14606 120 208 J BESSE TUR INDICATION YOKOGAWA 4 0 02 mA DC ACCURACY 0 02 mA DC zz D EHE mA DC Qs T EM d SCH a AEA RE SER IE SIS AMBIENT TEMP amp HUM ABA APPROVED BY SES ena SE QIC 12B07C05 01 Edi Jul 2007 IM 12B07C05 01E NOI LO3dSNI sol 50 10 SPARE PARTS See Customer Maintenance Parts List IM 12B07C05 01E 51 APPENDICES Appendix 1 Buffer tables NIST IEC 60746 2 DIN 19266 Q O 9
46. Range 1 00 pH inf P ID control mA2 Range 10 C F inf P control mA1 Manual Reset 0 100 PI D control mA1 I time 3600 sec 3600 sec P I D control mA1 D time 0 sec 60 sec Linear mA1 0 Value 0 pH inf Linear mA2 OP CPF inf Linear mA1 100 value 14 pH inf Linear mA2 100 C F inf Table Table mA1 see appendix 1 16 pH IM 12B07C05 01E ONINOISSIININOO AYNLONHLS NNAW H 30 Expire time If the output is over 100 for longer than the expire time the output will return to 0 Damping time The response to a step input change reaches approximately 90 percent of its final value within the damping time I Set process point value I I Reverse I I Set process gt point value Figure 5 2 Direct Reverse action 5 8 Contact output setup S1 S2 S3 S4 Each Switch contact can have the following functions 1 Control A selection of P PI or PID control 2 Alarm Low or high value Limits monitoring 3 Hold A hold contact is energised when the instrument is in HOLD 4 Wash See section 6 8 5 Fail S4 is set as fail safe contact 6 6 Simulate To test the operation of the con tact simulate can be used The contact can be switched on or off or a percentage of duty cycle can be entered DC period time 7 Off Switch is not used d power on pan Se power down normal opened contac activated S1 S2 S3 e eTe e e S4 e e oo
47. UND 15 METAL MEASURE 16 SHIELD 17 SHIELD 7 di Cable Markers Separate electrodes for ORP measurements O 11 TEMPERATURE O 12 TEMPERATURE O13 REFERENCE 14 SOLUTION GROUND ORP O 15 METAL O16 SHIELD 017 O 11 TEMPERATURE O 12 TEMPERATURE REFERENCE I SOLUTION GROUND METAL MEASURE SHIELD SHIELD 7 hi Cable Markers Combined metal reference electrode for ORP measurement O 11 TEMPERATURE O 12 TEMPERATURE REFERENCE d SOLUTION GROUND ORP METAL SHIELD SHIELD ONIYIM ANY NOILVTIVLSNI H Ee Kee a a FU20 four in one sensor for E FU20 four in one sensor for ORP measurement ORP measurement with normal reference with pH sensor as reference O 11 TEMPERATURE 12 TEMPERATURE 13 GLASS y 14 SOLUTION GROUND 15 METAL 16 SHIELD 17 SHIELD bi Cable Markers Single electrodes for rH measurement Figure 3 10 c Sensor wiring for redox measurement O 11 TEMPERATURE O 12 TEMPERATURE 013 GLASS d 14 SOLUTION GROUND 15 METAL 016 SHIELD 017 SHIELD ui Cable Markers Combined metal glass electrode for sensor pH compensated Redox ORP rH measurement IM 12B07C05 01E 24 5 MENU STRUCTURE COMMISSIONING 5 1 Sensor setup Sensor type The sensor connection to the ter minals is determining the setting of this parameter Three selec tions can be made here pH Only pH needs to be measured The glass electrode is connected to terminal 15
48. Universal rev Fld dev rev Sofware rev Poll addr Num req preams Level 2 menu HOLD setup Configure error Off Warn Fail Sensor logbook mA logbook Contact logbook Erase logbook Warn logbook full Date Descriptor Message Poll addr Num resp preams Level 3 menu HOLD L F mA1 fixed mA2 fixed Hold dur cal wash Calibration Sensor Predictive Maint All logbooks Note HART protocol DD files can be downloaded by following URL http www yokogawa com an download an dl fieldbus 001en htm 55 Level 4 menu IM 12B07C05 01E SEH 56 Appendix 3 Temperature compensation matrix 1 A minimum number of values is required to make interpolation possible The highlighted values marked as are mandatory to enter er BENE v Fer e 1 pf 1 sp j sa Lo d __ os a Fee 2 Tref reference temperature is defined in the Temperature Compensation menu If Tref is between T1 and T5 then the value of Tref needs to be entered as T2 or T3 or T4 we vr Fa v 5 Sol2 sm E sw SD 3 For every SxTx that is entered the following values become mandatory to enter SxTr SxT1 SxT5 and Tx ow 1 EHE lt lt a sm sm sm 1 sm se I 1 11 1 i sm fem Lal ss 1 pf The matrix can be cleared before entering new values Next new matrix values can be entered as described above The EXAxt can interpolate the ma
49. User s Model PH450G Style S2 pH and ORP Converter EC Manual vigilantplant hen energizec m e I m YOKOGAWA 9 TT Editon Yokogawa Electric Corporation Note This page may be referred to when reading pages where subsequent submenu screens are shown in the text Connection to the relevant submenu screen is indicated by a doted line with an arrow Note that screens in the text are typical examples and actual screens may differ depending on the set parameters Tag EXAxt FH450 EXAxt PH450 Commissioning Change language Concentration Commissioning 7 Sensor setup 4 Measurement setup Output setup Error configuration amp Logbook configuration Advanced setup Display setup e Enter Connection to the relevant submenu screen is indicated by a doted line with an arrow TI _ ri Sensor setup Sensor type Measurement setup 7 Temperature settings 4 Temp compensation amp Calibration settings Impedance settings e Output setup A2 Output gt Alarm Alarm v o s Wash gt 1 3 Warn Wam emperature too high Warn emperature too low Warn Pea 09s Configure logbook 7 Sensor logbook Settings logbook mA amp Settings logbook contact e oe eo e rase logbook Calibration rase No arn if logbook full No Advanced setup Factory adjustment Display setup 7 Main
50. ble Markers Single electrodes for rH measurement Figure 3 10 c Sensor wiring for redox measurement O 11 TEMPERATURE O 12 TEMPERATURE 013 GLASS O 14 SOLUTION GROUND 15 METAL d 016 SHIELD 17 SHIELD ii Cable Markers Combined metal glass electrode for sensor pH compensated Redox ORP rH measurement IM 12B07C05 01E 16 3 7 2 Sensor cable connection with special grommet 450G D A version In order to seal multiple sensor cables into EXAxt 450 a special grommet is provided that is designed to accommodate one two or three sensor cables 5 mm dia plus a liquid earth cable 2 5 mm dia In the pack with the grom met are blanking pieces to close any unused holes When correctly assembled the grom met maintains the IP66 and NEMA 4X rating of the EXAxt 450 housing Note The special grommet is intended to be used to seal the multiple cables from the Yokogawa flow fittings such as FF20 The designated cables are WU20 sensor cables which are approximately 5 mm 0 2 in diameter and K1500FV liquid earth cables which are approximately 2 5 mm 0 1 in diameter For sensor systems using a single cable like the FU20 and the PR20 PD20 PF20 and PS20 the standard gland will accommodate the cable adequately Single cables between approximately 6 mm and 12 mm 0 24 and 0 47 can be sealed properly with these glands and the standard tule Figure 3 11 a Grommet set use Figure 3 11 b Content o
51. careful to make sulfuric acid solution Note Customer Maintenance Parts List Item Ia 1b 2 3 Ba 5D 56 6a 6b I 8a 8b 9 10 11 12 Part No K9676GA K9676HA K9676EB K9676MA K9676MX K9676MW K9676MY A1108EF A1111EF K9676BE K9676BU K9676BY K9676DL K9676BT K9676CM K9171SU K9316AF K9676BC emi em e lI lI lI lI lI Il sen 2 1 1 1 Model PH450G Style S2 pH and ORP Converter 4 LO 4 LOX x Description Power board assembly AC version Power board assembly DC version Main board assembly PH version LCD module Cable assembly 3 core Cable assembly 10 core Cable assembly shield Fuse AC version 1 pcs Fuse DC version 1 pcs Cover assembly without screws and hingepins Cable glands assembly 6 pcs M20 Grommetset Stainless tagplate blank Screw assembly to fix cover M4 screws washer O ring hingepins Housing assembly polyurethan baked finish Adapter assembly for conduit work For G1 2 screw when AFTG specified For 1 2NPT screw when ANSI specified For M20 screw when AM20 specified Do not exchange these parts Call service personnel Copyright 2007 4th Edition Oct 2011 YK YOKOGAWA Subject to change without notice CMPL 12B07C05 02bE Yokogawa Electric Corporation Pipe Wall Mounting Hardware Option code U Awning Hood Option code H5
52. cient 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 conjunc tion with the corresponding sensor instruction manual Yokogawa designed the EXAxt converter 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 12B07C05 01E NOILLdI4HIS3G 1IVH3N39 ANY NOILONCOMINI 2 2 GENERAL SPECIFICATIONS OF EXAxt PH450G A Inputs specs B Input ranges pH ORP rH Temperature Pt1000 Pt100 3500 DKK 5k1 6k8 PTC10k NTC 8k55 3kBalco Accuracy pH input ORP input Temperature C Step response Dual high impedance input 10120 under referance conditions 2 to 16 pH 1500 to 1500 mV O to 100 rH 30 to 140 C 30 to 140 C 30 to 140 C 30 to 140 C 30 to 140 C 30 to 140 C 10 to 120 C 30 to 140 C lt 0 01 pH lt 1mV lt 0 3 C s 0 4 C for Pt100 lt 4 sec for 90 pH 7 pH 4 Note on performance specifications The following tolerance is added to above performance mA output tolerance 0 02 mA of 4 20 mA D General Output functions Control function Burnout function Hold E Contact
53. cted from this data The observed trend is extrapolated and the trend predicts when max deviations will be exceeded Good predictions are only achieved with good calibration data Prior to calibration the sensor should always be well cleaned and rinsed and the calibration procedures strictly observed 4 3 11 HART ID a part of the HART device ID descriptor 4 3 12 Software revision the revision level of the software in the instrument TROUBLE SHOOTING If you contact the local sales service organiza tion 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 3 13 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 14 Logbook The EXAxt contains several logbooks to store history information on events changed settings and calibrations The logbooks have been categorized to simplify the retrieval of this information Calibration will give information of pr
54. cuitry to conden sation Note Never use harsh chemicals or solvents In the event that the window does become heavily stained or scratched refer to the parts list for replacement part numbers Battery The EXAxt converter 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 work ing 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 protect ing the instrument If you suspect that this needs to be replaced contact your nearest Yokogawa service center 7 2 Periodic maintenance of the sensor A N Note Maintenance advice listed here is intentionally general in nature Sensor maintenance is highly application specific To perform correctly pH sensors should be clean This may be an obvious statement but it has some implications for routine maintenance The user should consider the reason behind a drift seen in a pH sensor system rather than to blindly recalibrate frequently and hope to thus minimize the errors Most drift in pH systems can be traced to fouling or deposits of some sort building up on the sensor It is often the case that a simple frequent cleaning regime can replace a too frequent calibration with the associated saving in labor and costly calibra tion solut
55. d and touch Enter the value on the data display increases in steps of 4 mA Check the current outputs 1 and 2 corresponding to the data display the current output must be within the range shown in Table 4 QIS 12B07C05 01E IM 12B07C05 01E NOILOAdSNI m 48 Table 4 Data Display Current Output MA DC 4 0 02 20 12 0 02 20 0 02 After all tests are completed a Touch the Exit twice to return to the Service display b Select Normal in Key c Touch the Home icon to return to the initial display POWER SUPPLY 1 H PH450G Sensor s DC Ammeter POWER SUPPLY DC Ammeter O O Standard Voltage Generator Figure 1 Testing Circuit and Test Equipment IM 12B07C05 01E QIS 12B07C05 01E 49 KE TEST CERTIFICATE EE Bp 4 stpH ORP2 Ha 2 amp PRODUCT NAME 4 WIRE pH ORP CONVERTER AA MODEL PH450G FANO HET Rz ORDER NO SERIAL NO MN APPEARANCE Se TRU EBT 1 2 f amp HR EE FR Hm FE INSULATION f Hi AHF 31 32 33 41 42 43 51 52 53 71 72 73 FREE Hb m T P RESISTANCE EH him 61 62 65 66 SER EE HE HA FA 100M 2 LIE 500V DC BETWEEN POWER SUPPLY TERMINALS 1 2 AND PROTECTIVE EARTH TERMINAL BETWEEN CONTACTS TERMINALS 31 32 33 41 42 43 51 52 53 71 72 73 AND PROTECTIVE EARTH TERMINAL BETWEEN CURRENT OUTPUT TERMINALS 61 62 65 66 AND PROTECTIVE EARTH TERMINAL 100M OR
56. d 73 and the protective earth terminal 3 Between the current output terminals shorted 62 and the protective earth terminal Dielectric Strength Test 1 Apply 1390 V AC an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz or 60 Hz between the power supply terminals shorted together 1 and 2 and the protective earth terminal for at least 2 seconds The insulation must withstand this voltage The sensed current should be 10 mA 2 Apply 1390 V AC an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz or 60 Hz between the contact output terminals shorted together 32 33 42 43 52 53 72 and 73 and the protective earth terminal for at least 2 seconds The insulation must withstand this voltage The sensed current should be 10 mA 3 Apply 500 V AC an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz or 60 Hz between the current output terminals shorted 62 and the protective earth terminal for at least 2 seconds The insulation must withstand this voltage The sensed current should be 10 mA Sensor Signal Input Test Connect the testing circuit as shown in Figure 1 and set the equipment as follows Decade resistance box temperature simulation input 1097 3 CO The power supply voltage should be set in accordance with the specifications of the converter YOKOGAWA 9 QIS 12B07C05 01E Yokogawa Electric Corporation EES 2007
57. d when a fail situation occurs Hard Fail Only The contact reacts to Hard Fails Only Hard Soft Fail The contact reacts to Hard and Soft Fails IM 12B07C05 01E 5 10 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 cycle Period time see figure 5 4 is used as a period for percentage simulation Note that the simulated settings of the con tacts 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 Y 33 Generic wash settings nterval time ash time 05min ecovery time 05min Enabled Disabled see chapter 6 for wash setup Disabled Enabled anual Wash Enabled ontinuous Wash Disabled Sample and Hold S1 fail Setup Hard Soft Fail i ri Hard Soft Fail Hard Fail only S1 simulation On Off Simulate OnOR Ii Contact off ssi Contact oft ercentage 50 00 5 S2 S3 S4 Similar structure to S1 Output setup AT A2 Output S1 Alarm 52 Alarm 53 Wash 54 Fail 4 Configure Hold Parameter Default values Generic wash settings Interval time 0 1 hour 36 hour Generic wash settings Wash time 0 1 min 10 min Generic wash settings recovery time 0 1 min 10 min Sim
58. display rend Graph Screen amp X axis Timing Joe o o 4 Y axis Limits Auto Return 10 min PREFACE Electrostatic discharge The EXAxt converter contains devices that can be damaged by electrostatic discharge When servicing this equipment please observe proper procedures to prevent such damage Replacement components should be shipped in conductive packaging Repair work should be done at grounded workstations using grounded soldering irons and wrist straps to avoid elec trostatic discharge DANGER Installation and wiring The EXAxt converter should only be used with equipment that meets the relevant IEC Ameri can or Canadian standards Yokogawa accepts no responsibility for the misuse of this unit FUN CAUTION The Instrument is packed carefully with shock absorbing materials nevertheless the instru ment may be damaged or broken if subjected to strong shock such as if the instrument is dropped Handle with care AN WARNING Do not use an abrasive or organic solvent in cleaning the instrument Do not modify the PH450 converter e Substitution of components may impair suitability for Division 2 Do not remove or replace while circuit is live unless area is know to be non hazardous Explosion Hazard Do not disconnect equipment unless area is known to be non hazardous Do not reset circuit breaker unless power has been removed from the equipment or the area is known to be non hazardous
59. e The sensed current should be 10 mA 2 Apply 1400 V AC an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz or 60 Hz between the contact output terminals shorted together 31 32 33 41 42 43 51 52 53 71 72 and 73 and the protective earth terminal for at least 2 seconds The insulation must withstand this voltage The sensed current should be 10 mA 3 Apply 500 V AC an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz or 60 Hz between the current output terminals shorted 61 62 65 and 66 and the protective earth terminal for at least 2 seconds The insulation must withstand this voltage The sensed current should be 10 mA Sensor Signal Input Test Connect the testing circuit as shown in Figure 1 and set the equipment as follows Decade resistance box temperature simulation input 1097 3 Q The power supply voltage should be set in accordance with the specifications of the YOKOGAWA 9 QIS 12B07C05 01E 1st Edition Jul 2007 Yokogawa Electric Corporation 2nd Edition Sep 2013 IM 12B07C05 01E converter This test is done on the HIF display of Factory Mode Touch the Setup icon Touch the Commissioning Touch the Advanced setup Touch the Factory adjustment Enter a password Select the Factory Mode in Key Select the HIF in Execute 47 Select the Input1 pH in mV input When the standard voltage source t
60. e in the LCD bracket as shown in Figure 3 4 on page 7 For units manufactured between April 2006 and April 2007 the potentiometer is located as shown below N AA A mo ON Touchscreen adjustment AN CAUTION A few years after using the touchscreen may deviate from the correct position due to aging deterioration of the touchscreen When that happens turn off power then on again The touchscreen will be calibrated automatically to the correct touch position at power on It is recommended to turn off power then on again when periodic maintenance A CAUTION Do not turn on power with the touchscreen pressed otherwise inaccurate touch position will occur If it occurs leave the touchscreen unpressed turn off power then on again The touch position will be accurate 45 8 TROUBLESHOOTING 8 1 General 8 3 Predictive maintenance The EXAxt is a microprocessor based con EXAxt has a unique prediction feature Calibra verter that performs continuous self diagnostics tion and reference impedance data are stored to verify that it is working correctly Error mes in software data logbooks This data is then sages resulting from faults in the micro proc used to calculate a prediction for maintenance essor systems itself are monitored Incorrect purposes programming by the user will also result in an See section 4 3 9 and 4 3 10 error explained in a message so that the fault can be corrected accordi
61. en supplied without the temperature dependency curve Their stability will never be as good as NIST solutions Always ensure that the sensors are properly conditioned clean and filled with the correct electrolyte solution if appropriate before starting a calibration Refer to section 7 Maintenance and to the sensor instructions for details 6 2 Manual calibration mode The unit is adjusted to agree with the value of a known solution This may be a buffer solution or a known process sample The user deter mines the pH value the temperature influence and the stability 1 A single point can be set to adjust only the zero asymmetry 2 A second point can be set to determine the slope sensitivity IM 12B07C05 01E 6 3 Automatic calibration mode The PH450G will provide prompts to aid the user to make a good calibration High quality buffer solutions must be used for best results The user selects the buffer type that he is using in the calibration menu The buffer set is selected in Commissioning gt gt Measurement setup gt gt Calibration setting gt gt Buffers See also Appendix 1 The PH450G uses temperature sensor input to determine the exact buffer values The EXAxt also determines the stability drift and will reject the new calibration data if it is outside limits The PH450G records the values internally and uses them to calculate the final calibration 1 A single point can be set to adjust onl
62. enu Online menu Commissioning Meintenance setup Calib settings Impedance settings Output setup mA1 setup mA2 setup similar to mA1 S1 setup S2 setup similar to S1 S3 setup similar to S1 S4 setup similar to S1 IM 12B07C05 01E Level 3 menu Buffer set Sero Slope ITP Input 1 Impedance Imp 1 low limit Imp 1 high limit Input 2 impedance Imp 2 low limit Imp 2 high limit Type 7 control Func Process parameter PID SP PID Rng PID dir PID MR PID I time PID D time Burn Expiry time Type 7 control Func Process parameter Expiry time PID SP PID Rng PID dir PID MR PID Lime PID D time Analog output DC period time max pulse freq Type fail func Type wash func Inter time Wash time Rec time Man wash Con Wash Level 4 menu Zero Slope ITP ORP zero ORP slope rH zero rH slope Type 7 output Func Process parameter Lin 0 Lin 100 Burn Damping time Type 7 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 Online menu Commissioning Loop test Basic setup Review Level 1 menu Output setup Logbook config Tag Distributor Model Device information Model Distributor Write protect Manufacturer Dev id Tag Descriptor Message Date
63. er warranty or non warranty service is requested 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 decontami nated 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 proc esses to which the equipment has been exposed iii TABLE OF CONTENTS PREFACE 1 INTRODUCTION AND GENERAL DESCRIPTION eere nnne nnns 1 ELSE el ce RTT 1 Ne HEEM 1 2 GENERAL SPECIFICATIONS OF EXAxt PH450G oooo mm mom 2 3 INSTALLATION AND WIRING iii 5 3 1 Installation and dimensions 9 TETEN 5 Ee Tadler 9 EE N S EEE EA E E A A EAE E EA A TEE E A AEE 7 2 PE ENN 7 3 2 2 Cables Terminals and glands o oooo WWW 8 3 3 Wiring the power SUP E 9 3 3 1 General precautions nennen nnne nns 9 3 3 2 Access to terminal and cable ent REENEN 10 3 3 3 AC ele EE 10 Se Mee 10 3 3 5 Grounding the MOU Sigi oom momonon mesa bes kn REP aua pri tbt an anta 11 3 3 6 Switching on the msirument ener 11 3 4 Wiring the contact le 12 3 4 1 General pDrecautons iii 12 3 4 2 Contact TE US oii eat ART SERRE TRS O ORI I 12 TONN lait 12 3 5 Wiring the mA output signals
64. evious 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 history 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 Sensor Logbook Predictive maintenance If the sensor diag nostics of the EXAxt are enabled the diagnos tics are saved into this logbook For the EXAxt PH450G the reference imped ance measured between the Liquid earth and 21 the reference electrode is stored every hour This information can be used for predictive maintenance schedules as the impedance is a measure of fouling and the sensor should be kept clean for best results Settings will give all history information on pa rameter settings concerning the analog outputs mA1 mA2 and contact S1 S4 This logbook is useful to trace back differences in perform ance due to changed settings The events logged in this logbook are user definable This is done in Commissioning gt gt Configure Logbook gt gt Settings Logbook mA and or Settings Logbook contact mA1 mA2 shows all dynamic events concern ing the analog outputs S1 S2 S3 S4 shows all dynamic events con cerning the contacts Each HMI screen can contain up to 5 events As the logbook can contain 50 one can access previous events by selecting events
65. f grommet set IM 12B07C05 01E 3 7 3 Sensor cable connections using junc tion box BA10 and extension cable WF10 Where a convenient installation is not possible using the standard cables between sensors and converter a junction box and extension ca ble may be used The Yokogawa BA10 junction box and the WF10 extension cable should be used These items are manufactured to a very high standard and are necessary to ensure that Kc e 45 Core Screen White Co axial cable Overall Screen Leen 3 Core D Screen Brown Co axial Cable Co axial cable white 16 screen 17 the specifications of the system can be met The total cable length should not exceed 60 metres e g 5 m fixed cable and 55 m exten sion cable In case of systems using dual high impedance sensors e g Pfaudler 18 then the cable length is restricted to 20 metres fixed cable only no extension with WF 10 EXA pH TRANSMITTER I CONVERTER Co axial cable 17 screen brown Figure 3 12 Connection of WF10 extension cable and BA10 junction box IM 12B07C05 01E ONIYIM ANY NOILVTIVLSNI H 18 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 neces sary to te
66. 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 main screen to remove the HOLD The route for HOLD setup is Commissioning Output setup Configure Hold 6 8 Contact output setup Wash Wash functionality is more than activating the cleaning system Wash can be seen as an inter ruption of the normal measuring mode to clean the electrode system The wash cycle first cleans the sensor system either chemical or mechani cal during wash time Tw Next the sensor system is left to recover during wash recovery time Tg After the sensor system is recovered the wash cycle has ended and converter returns to the normal measuring mode The input contact is always enabled when an output contact is configured as wash The input contact can be used to enable a wash when a high impedance error occurs on the reference electrode Then one wash cycle is started Hold during wash When enabled the mA outputs will be frozen to a pre defined last or fixed value All contacts are de energized except the one s configured as wash contact Disabled mA outputs and contacts will not be affected by wash cycles IM 12B07C05 01E NOILVYEI TYO 46 9 QUALITY INSPECTION Quality PH450G Inspection pH and ORP Co
67. g hingepins Housing assembly polyurethan baked finish Adapter assembly for conduit work For G1 2 screw when AFTG specified For 1 2NPT screw when ANSI specified For M20 screw when AM20 specified Do not exchange these parts Call service personnel Copyright 2007 4th Edition Oct 2011 YK YOKOGAWA Subject to change without notice CMPL 12B07C05 02bE Yokogawa Electric Corporation Pipe Wall Mounting Hardware Option code U Awning Hood Option code H5 Do not open when energized I I I L I I CMPL 12B07C05 02E Part No K9171SS Y9608KU D0117XL A K9171SY K9171SX K9171ST Y9520LU K9171SW Y9608KU K9676BA A NNa SAARE Panel Mounting Hardware Option code PM UNIVERSAL MOUNT SET Option code UM includes both U and PM Description Mounting Set U Screw U Bolt Assembly Plate Bracket Mounting Set PM Screw Bracket Screw Awning hood assembly H5 4th Edition Oct 2011 YK Revision Record Manual Title Model PH450G Style S2 pH and ORP Converter Manual Number IM 12B07C05 01E Edition Date Remark s 1st Jul 2007 Newly published 2nd Sep 2007 Back side of cover note added p1 FM approval description of Figure 1 1 changed p7 some CAUTION of Figure 3 4 and the touchscreen added p21 sec 4 3 11 Serial number changed p23 parameter
68. g the product to ensure protection and safety of the human body the product and the system containing the product How to dispose the batteries This is an explanation about the new EU Bat tery Directive DIRECTIVE 2006 66 EC This directive is only valid in the EU Batteries are included in this product Batteries incorporated into this product cannot be removed by your self Dispose them together with this product When you dispose this product in the EU con tact your local Yokogawa Europe B V office Do not dispose them as domestic household waste Battery type silver oxide battery Notice The symbol see above means they shall be sorted out and collected as ordained in ANNEX Il in DIRECTIVE 2006 66 EC The following safety symbols are used on the product as well as in this manual A DANGER This symbol indicates that an operator must follow the instructions laid out in this manual in order to avoid the risks for the human body of injury electric shock or fatalities The manual describes what spe cial care the operator must take to avoid such risks WARNING This symbol indicates that the operator must refer to the instructions in this manual in order to prevent the instrument hard ware or software from being damaged or a system failure from occurring A CAUTION This symbol gives information essential for understanding the operations and func tions Note This symbol indicates information
69. hooting procedures including possible causes and remedies 8 2 Calibration check The EXAxt PH450G converter incorporates a diagnostic check of the adjusted slope or zero value during calibration If the adjusted value stays within the configured limits it is accepted otherwise the unit generates an error mes sage and the calibration is rejected IM 12B07C05 01E ONILOOHS I8nos L D 46 9 QUALITY INSPECTION Quality PH450G Inspection H and ORP Converter Standards i Scope This inspection standard applies to the PH450G pH and ORP Converter Inspection Items 2 1 Insulation resistance test 2 2 Dielectric strength test 2 3 Sensor signal input test 2 4 Temperature indication check 2 5 Current output test Note Items marked with an asterisk may only be confirmed by a test certificate Inspection Methods Standards and Conditions e Connect the testing circuit as shown in Figure 1 Allow the instrument to warm up for at least 5 minutes before conducting the tests For the connections for the insulation resistance and dielectric strength tests follow the instructions in Sections 3 1 and 3 2 Insulation Resistance Test Apply 500 V DC between the terminals shown below The insulation resistance must be 100 MO or greater 1 Between the power supply terminals shorted together 1 and 2 and the protective earth terminal 2 Between the contact output terminals shorted together 32 33 42 43 52 53 72 an
70. ht or severe weather conditions e Maintenance procedures are possible avoiding corrosive environments The ambient temperature and humidity of the installation environment must be within the limits of the instrument specifications See chapter 2 3 1 2 Mounting methods Refer to figures 3 2 and 3 3 Note that the EXAxt converter has universal mounting capa bilities Panel mounting using optional brackets Surface mounting on a plate using bolts from the back e Wall mounting on a bracket for example on a solid wall Pipe mounting using a bracket on a horizontal or vertical pipe Size nominal 50A Unit mm inch Hood Option code H5 some cutout on the left side cover 144 5 67 1 24 5 A M20 cable gland When shipped not installed Adapter for Coduit Work optional option code AFTG ANSI AM20 20 0 79 A A A A For output signal Adapter T O O B For contact input 49 Approx E O O C For sensor cable 1 93 55 2 2 I N gt D For contact output S1 and S2 x O O O E For contact output S3 and S4 D UE Sr F For power supply amp G1 2 screw AFTG 1 2 NPT screw ANSI Grounding terminal M4 screw a M20 screw AM20 Figure 3 1 Housing dimensions and layout of glands IM 12B07C05 01E ONIYIM ANY NOILVTIVLSNI H Unit mm inch min 185 7 25 Figure 3 2 Option PM panel
71. in 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 converter is intended to be used for continuous on line measurement of pH and or Redox in industrial installations The unit combines simple operation and micro processor based performance with advanced self diagnostics and enhanced communications capability to meet the most advanced require ments 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 func tion as a controller for a dosing neutralisation system Sensors should normally be mounted close to the converter in order to ensure easy calibra tion and peak performance If the unit must be mounted remotely from the sensors WF 10 extension cable can be used up to a maximum of 60 meters 150 feet with a BA10 junction box and up 10 meters 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 be adjusted for a number of different types of temperature sensors Details provided in this instruction manual are suffi
72. ing appears when HART communication is not used Note that the X mark may appear due to output signal noise or the like even when HART communica tion is not used There is not problem when HART communication is not used Continue operation while ignoring the mark 4 2 Trending graphics 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 converter 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 PH450 Maximum Minimum Live reading Maximum Average y Minimum Figure 4 2 Trend screen 4 3 Zoom in on details This button gives access to the diagnostic information of the converter The following messages will appear under normal default conditions Home key back to mainscreen One level up 54 oo on oo O
73. ions Neutralization processes where lime or soda is used to raise the pH are well known for causing coatings and blocking reference junctions with the insoluble hydroxides that are precipitated In such an application daily washing of the sensors in a dilute acid will yield a far better performance than a daily buffer calibration It will also take a fraction of the time Each application should be judged on it s own merits some will have greasy deposits that will need a soapy solution to clean some may even require organic solvents to remove resinous deposits In any case avoid harsh chemicals like concentrated acids and abrasive cleaners as these will destroy the conditioning of the sensors and will require a re hydration period before full function is restored After cleaning the sensors and prior to a calibration always rinse thoroughly in distilled water to ensure that there is no residue of the cleaning medium to contaminate your calibration solution Z FONVNALNIVIN Note Some applications will poison simple sensors with non reversible chemical changes These systems do not improve with cleaning If you suspect that your system is one of these contact your local Yokogawa sales office or representative for advice An alternative sensor type will improve the performance IM 12B07C05 01E 44 Where a refillable flowing electrolyte refer ence system is employed make sure that the reservoir is kept topped up
74. lue The sample mode eliminates the calculation usually needed for this kind of calibration A sample calibration is a single zero point calibration 6 5 Temperature calibration In order to make the most accurate meas urements it is important to have a precise temperature measurement Measure the temperature with a high precision thermometer Adjust the sensor reading accordingly For best accuracy this should be done as near to the normal operating temperature as possible ORP amp rH calibration modes 6 6 ORP amp rH calibration The calibration modes for ORP or rH are the Manual and the Sample modes Manual calibration can be used for either single or two point calibrations Sample calibration is only a single point as it is with in pH measurement The non availability of well defined buffer solutions for ORP and rH eliminates the automatic calibration option Calibration ORP Calibration rH amp Temperature calibration Temperature calibration Start manual wash cycle Start manual wash cycle Refer to the user manual of the ORP electrode for the proper calibration method 6 7 Operation of hold function during cali bration EXAxt PH450G 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
75. ment determine the rest of the HMI menu structure Manual Temp comp Temp Coef Temp Coef Matrix Matrix Parameter Manual Temp Reference Temp T C pH T C ORP Temp Ranges pH Ranges Default values 25 C 77 F 25 C 77 F 0 0 pH C 0 0 pH F 0 0 mV C 0 0 mV F 30 C 22 F 0 C 32 F 0 1 pH C 0 06 pH F 10 mV C 6 mV PF 30 C 22 F 1 99 pH 139 C 284 F 100 C 211 F 0 1 pH C 0 06 pH F 10 mV C 6 mV F 139 C 284 F 16 pH IM 12B07C05 01E ONINOISSIININOO AYNLONHLS NNAW H 26 5 5 Calibration settings Calibration settings for a pH converter involve slope sensitivity zero aspot and ITP iso thermal point The following figure shows the pH value to the mV output of the sensor Characteristic for pH measurement is an offset also known as aspot mV or zero pH and a Slope mV pH For an ideal sensor the theo retical slope is 59 16 mV pH at 25 C Slope can be entered in mV pH or a percentage of the theoretical slope 10096 corresponds to 59 16 mV pH ITP is where the output of the sensor does not change with temperature Note that slope and zero are defined at 25 C p mV e 200 Figure 5 1 Calibration parameters Units Zero aspot unit Zero is an alternative to Asymmetry Potential This method conforms to the DIN standard for instruments IEC 60146 2 Zero is defined in pH or mV Slope
76. mounting diagram Note When option code UM is specified universal pipe wall pannel mounting kit are supplied same as option code U and PM both specified wall mounting pipe mounting pipe mounting vertical horizontal SN 2 ND pipe Figure 3 3 Option U wall and pipe mounting diagram IM 12B07C05 01E AN WARNING This connector for software must be used only by Yokogawa s service personnel input terminal block potentio merter output terminal block LCD bracket protective shield bracket ONIYIM ANY NOILVTIVLSNI H 2 6 X M20 glands __ Note PH450G A D U The enclosure is provided with stoppers in stead of M20 cable glands for the unused holes These stoppers must be removed and replaced by FM approved conduit fittings in accord ance with good installation practice Also see Appedix 4 Control drawing for FM approval Figure 3 4 Internal view of EXAxt wiring compartment AN WARNING Always place the screen plate over the power supply and contact terminals for safety reasons 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 HART 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 i
77. moved from the equipment or the area is know to be non hazardous Wiring for Division 2 must comply with NEC NFPA 70 or Local Electrical Code as applicable At Ta 55 C Maximum Current rating for Relay Contacts S1 S4 is 4A AtTa 40 C Maximum Current rating for Relay Contacts S1 S4 is 5A Incase of using cable glands in Outdoor location they shall be UV rated or made of metal Rev 4 August 13 2007 Doc No NFM016 A9 P 1 Yokogawa Electric Corporation NFM016 IM 12B07C05 01E SEH 58 IM 12B07C05 01E Customer Maintenance Parts List Item Ia 1b 2 3 Ba 5D 56 6a 6b I 8a 8b 9 10 11 12 Part No K9676GA K9676HA K9676EA K9676MA K9676MX K9676MW K9676MY A1108EF A1111EF K9676BE K9676BU K9676BY K9676DL K9676BT K9676CM K9171SU K9316AF K9676BC emi em e lI lI lI lI lI Il sen 2 1 1 1 Model PH450G Style S2 pH and ORP Converter 4 LO 4 LOX x Description Power board assembly AC version Power board assembly DC version Main board assembly PH version LCD module Cable assembly 3 core Cable assembly 10 core Cable assembly shield Fuse AC version 1 pcs Fuse DC version 1 pcs Cover assembly without screws and hingepins Cable glands assembly 6 pcs M20 Grommetset Stainless tagplate blank Screw assembly to fix cover M4 screws washer O rin
78. mple mode eliminates the calculation usually needed for this kind of calibration A sample calibration is a single zero point calibration 6 5 Temperature calibration In order to make the most accurate meas urements it is important to have a precise temperature measurement Measure the temperature with a high precision thermometer Adjust the sensor reading accordingly For best accuracy this should be done as near to the normal operating temperature as possible ORP amp rH calibration modes 6 6 ORP amp rH calibration The calibration modes for ORP or rH are the Manual and the Sample modes Manual calibration can be used for either single or two point calibrations Sample calibration is only a single point as it is with in pH measurement Note The non availability of well defined buffer solutions for ORP and rH eliminates the automatic calibration option How to check the ORP electrode is normal or not see Appendix 5 Calibration ORP Calibration rH amp Temperature calibration 1 Temperature calibration Start manual wash cycle Start manual wash cycle Refer to the user manual of the ORP electrode for the proper calibration method 6 7 Operation of hold function during cali bration EXAxt PH450G 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
79. n If you want to start with concentrated sulfuric acid mix one packet of the powder with approximately 150 ml of pure water in a wide mouth beaker then stirring vigorously IM 12B07C05 01E add 14 ml of concentrated sulfuric acid Top up with pure water to make 250 ml 2 Transfer about 50 100 ml of test solution to a clean 200 ml beaker 3 Remove the ORP sensor from its holder If an immersion holder is used first remove the holder then remove the sensor protector from the holder 4 Wash off any of the measured solution adhering to the sensor using tap water then wipe off any moisture droplets adhering to the sensor 5 Immerse the sensor tip in the test liquid see 2 above wait for the ORP reading to stabilize this typically takes 5 to 10 minutes 6 After the display reading has stabilized read and note it Measure the temperature of the test solution and check the ORP of the test solution at that temperature using Fig app 1 If the ORP reading is within the tolerance shown in Fig app 1 then the sensor is normal Note If the measurement value is only slightly out of tolerance you should check whether the test solution was fresh and whether it was mixed in the correct amounts see mixing instructions above Ferrous amp Ferric solution Tolerance ORP mV Tolerance 0 10 20 30 40 50 Temperature C ORP of Test Solution 7 Replace the sensor in its holder Fig app 1 Be
80. ng to the limits set in 8 4 Error displays and actions the operating structure The EXAxt also checks All errors are shown in the Main Display the sensor system to establish whether it is still screen however the EXAxt makes a distinction functioning properly between diagnostic findings The error mes sages may be set to OFF WARN or FAIL For In the main display screen is a Status Informa process conditions where a particular diagnos tion button that will show tic may not be appropriate the setting OFF is used FAIL gives a display indication only of For information that the system has a problem and inhibits the relay control action and can be set to trigger For warning a potential problem is diag the Burn function Burn up or Burn down nosed and the system should be checked drives the mA output signal to 21 mA or 3 6 mA respectively For FAIL when the diagnostics have confirmed a problem and 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 Error code screen that is used in conjunction with the service manual This data may also be needed in the event that you request assistance from a Yokogawa service department What follows is a brief outline of the EXAxt troubles
81. nverter Standards Scope This inspection standard applies to the PH450G pH and ORP Converter Inspection Items 2 1 Insulation resistance test 2 2 Dielectric strength test 2 3 Sensor signal input test 2 4 Temperature indication check 2 5 Current output test Note Items marked with an asterisk may only be confirmed by a test certificate Inspection Methods Standards and Conditions e Connect the testing circuit as shown in Figure 1 Allow the instrument to warm up for at least 5 minutes before conducting the tests For the connections for the insulation resistance and dielectric strength tests follow the instructions in Sections 3 1 and 3 2 Insulation Resistance Test Apply 500 V DC between the terminals shown below The insulation resistance must be 100 MQ or greater 1 Between the power supply terminals shorted together 1 and 2 and the protective earth terminal 2 Between the contact output terminals shorted together 31 32 33 41 42 43 51 52 53 71 72 and 73 and the protective earth terminal 3 Between the current output terminals shorted 61 62 65 and 66 and the protective earth terminal Dielectric Strength Test 1 Apply 1400 V AC an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz or 60 Hz between the power supply terminals shorted together 1 and 2 and the protective earth terminal for at least 2 seconds The insulation must withstand this voltag
82. o Slope ITP Use this menu if you want to manually overwrite the pH calibration results Calibration ORP rH zLimits and timing amp Zero Slope Use this menu if you want to manually overwrite the ORPYH calibration results Impedance settings nput 1 impedance No jumper between 15 and Io nput 2 impedance Low Place jumper between 13 and lo See also section 3 6 1 of the nstruction manual Parameter Limits and timing Zero high relative to I T P Zero low relative to I T P Slope high Slope low Stabilization time Limits and timing Limits and timing Limits and timing Limits and timing Limits and timing Calib interval Buffers Buffer table 1 2 3 Zero Slope ITP Zero Zero Slope ITP Slope Zero Slope ITP ITP Input 1 or 2 Impedance High limit Input 1 or 2 Impedance Low limit Default values 120 mV 2 03 pH 120 mV 2 03 pH 110 70 5 sec 250 days NIST DIN 19266 0 mV 7 pH 100 59 16 mV pH 7 pH 200000 Q 1000 Q Zero unit Slope unit Limits and timing Zero High Low 120 0 mV Slope High 110 0 Low 70 00 Stabilization time 5 s alibr interval 250 days Buffers Select buffer set NIST DIN 19266 Zero Slope TP Slope 100 0 7 00 pH Zero Slope 100 0 0 mV 0 pH 532 4 mV 9 pH 10096 70 2 sec 1 day See appendix 1 Zero low Zero low Slope low Slope low 0 pH 1000 O 1000 O NIST DIN 19266 DIN
83. o 12 mm 0 24 to 0 47 inches Unused cable entry holes must be sealed with cable glands includ ing the close up plugs supplied Contact S3 S4 output cables Contact 951552 output cables mA cables Input contact PH450G 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 0 24 to 0 47 inches x High voltage section Sensor Cables Power cable Suitable for cables with an outside diameter between 6 12 mm 0 24 0 47 Figure 3 5a Cable glands diagram Glandnut gt ES Figure 3 5b How to install cable glands IM 12B07C05 01E Contents 6 X Gland M20 6 X Close up plug 6 X Gland nut M20 6 X O ring 17 12 X 2 62 EPDM 70 sh NOTE The glands must be installed properly to meet IP66 and NEMA 4X rating Use close up plug for unused glands NOTE Moisturize O ring before assembling Adapter for conduit work When protect the cable with a conduit replace the M20 cable gland with a cable gland of optional conduit adapter and set the adapter shown as Figure 3 5c Approx 55 2 2 49 1 93
84. o the corresponding value of Simulation input mV in Table 1 is set check the data display and the value must be within the range shown in Table 1 Table 1 Simulation input mV Check Point pH Data Display pH o 20 01 7 3001 14 After the above test is completed select the Input1 ORP in mV input When the standard voltage source to the corresponding value of Simulation input mV in Table 2 is set check the data display and the value must be within the range shown in Table 2 Table 2 1500 Simulation input mV Check Point ORP Data Display mV 1500 1500 1 1500 1 After the above test is completed touch the Exit to return to the HIF display Temperature Indication Check Following Section 3 3 select the PT1000 in Temperature of the HIF display In this state change the resistance of the decade resistance box and check the data display The value on the data display must be within the range shown in Table 3 Table 3 Resistance Q of TEE E Decade Resistance BOX Data Display C 10 960 9 10 0 3 25 1097 3 120 1460 6 25 20 3 120 0 3 After the above test is completed touch the Exit to return to the HIF display Current Output Test Following Section 3 4 select the Check in mA outputs of the HIF display Set value 4 000 mA appears at the bottom of the display Select Next value in the Comman
85. o use a very wide range of other sensors IM 12B07C05 01E Unit Celcius or Fahrenheit temperature scales can be selected to suit the user s preference Manual temp reference temp temp coef ficient and temp ranges in the matrix are re calculated automatically to the new unit 5 4 Temperature compensation Two types of methods can be used here Automatic when a temperature element is used Select one of the Temp elements used The other is a manual set temperature which represent the temperature of the process The latter is used when temperature measurement is difficult and temperatures do not vary much Reference Temperature Choose a temperature to which the measured pH value must be compensated Normally 25 C is used therefore this temperature is chosen as default value Process Temperature Compensation TC It is possible to adjust the compensation factor directly If the compensation factor of the sam ple liquid is known from laboratory experiments or has been previously determined it can be introduced here Adjust the value between 0 1 to 0 1 pH C In combination with the reference temperature setting a linear compensation function is obtained suitable for all kinds of chemical solutions Matrix The EXAxt is equipped with a matrix type algo rithm for accurate temperature compensation in various applications Select the range as close as possible to the actual temperature pH range The EXAxt will compensa
86. ormat Y Y Y Y MM DD 37 No action Load factory defaults Save current as user defined Load user defined defaults IM 12B07C05 01E ONINOISSIININOO AYNLONHLS NNAW H 38 5 14 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 gt gt Measurement Additional text Each process value can be given an additional text containing up to 12 characters per text This text is 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 converter reverts to the measuring mode main display from anywhere in the configuration menus when no button is pressed during the set time inte
87. page 1 to 10 4 4 Information function In this field an information sign e a warning sign or a fail sign 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 converter based on menus and submenus Browse through the list using the hd key till you find the reguired menu and press the key to enter this menu Itis also possible to press onthe amp or symbol found beside the menu item O90StHd IXVX4 JO NOIL VH3dO H 4 6 Secondary primary value display switch 25 0 Pressing on this text block automatically switches the secondary value to the main display Large font size IM 12B07C05 01E 22 4 7 Navigation of the menu structure HOME KEY return to main display Tag EXAxt PH450 Main display EXAxt PH450 Commissioning Change language Concentration 7 Sensor setup Measurement setup Output setup Error configuration Logbook configuration Advanced setup Display setup Commisioning menu IM 12B07C05 01E RETURN KEY exit to previous display 4 8 Setup Concentration mode The concentration mode allows the user to generate an analog output signal that is linear to concentration units and to read the concent
88. r manual Compensation to Nernst equation Process compensation by configurable temperature coefficient NEN6411 for water or strong acids bases or programmable matrix Semi automatic 1 or 2 point calibration using pre configured NIST US DIN buffer tables 4 7 amp 9 or with user defined buffer tables with automatic stability check Manual adjustment to grab sample Software record of important events and diagnostic data readily available in the display or through HART Graphical Quarter VGA 320 x 240 pixels LCD with LED backlight and touchscreen Plain language messages in English German French Spanish Italian Swedish Portuguese and Japanese 290 x 300 x 290 mm Lx W x D 11 5 x 11 8 x 11 5 inch app 2 5 kg 5 5 Ibs app 1 5 kg Cast aluminum housing with chemically resistant coating Polycarbonate cover with Polycarbonate flexible window Protection IP66 NEMA 4X CSA Type 3S Silver grey IP66 cable glands are supplied with the unit NEMA 4X close up 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 Optional conduit adapter Power supply PH450G A PH450G D N o Safety EMC G1 2 1 2NPT or M20 female Ratings 100 240 V AC Acceptable range 90 to 264 V AC Ratings 50 60 Hz Acceptable range 50 Hz 5 60 Hz 5 Power Consumption 15 VA Ratings 12
89. ra tion on the LCD in the units mg l or ppt Concentration oncentration 1 105 mg L applicable only when mA is setto output and table oncentration Setup nit 100 m i 2 000 mg L 0 m i 0 000 mg L Example PH450 is used as ORP analyser and the output is linear to mg l Free Chlorine Table m i 1 0 000 5 000 695 0 mV 733 0 mV 762 0 mV 773 0 mV 784 0 mV 826 0 mV 10 00 15 00 20 00 50 00 2 3 4 5 6 25 00 7 Next mandatory As first step the table for mA1 must be filled in Then the concentration menu is opened and begin and end value of the scale are entered Setup is completed The measured concentration is now displayed on the top line of the LCD 23 OPERATION OF EXAxt PH450G IM 12B07C05 01E 24 5 MENU STRUCTURE COMMISSIONING 5 1 Sensor setup Sensor type The sensor connection to the ter minals is determining the setting of this parameter Three selec tions can be made here pH Only pH needs to be measured The glass electrode is connected to terminal 15 and the reference is con nected to terminal 13 Only Redox needs to be measured The metal is connected to terminal 15 and the reference or glass is connected to terminal 13 pH ORP When pH and ORP are measured simultaneously the glass electrode is connected to terminal 15 and the reference is connected to terminal 13 The metal electrode is connected to terminal 14
90. re is chosen as default value Process Temperature Compensation TC It is possible to adjust the compensation factor directly If the compensation factor of the sam ple liquid is known from laboratory experiments or has been previously determined it can be introduced here Adjust the value between 0 1 to 0 1 pH C In combination with the reference temperature setting a linear compensation function is obtained suitable for all kinds of chemical solutions Matrix The EXAxt is equipped with a matrix type algo rithm for accurate temperature compensation in various applications Select the range as close as possible to the actual temperature pH range The EXAxt will compensate by interpolation and extrapolation Consequently there is no need for a 100 coverage See Appendix 3 for matrix interpolation NEN6411 This is a NEN standard and applicable for many applications It s used for pH compen sation in water applications using a glass electrode The calculation is base on Ultra Pure Water UPW and is also valid for all strong acids and strong bases The main application is in demiwater and boiler feed water condensate easurement pH ORP Temperature settings 4 Temp compensation 4 Calibration settings Impedance settings emp element nit Te Temp comp eference temp 25 0 C rocess Temp Compensation pH None ORP 25 Note N Sensor type and Measure
91. ring 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 pH ORP rH and temperature Configurable delay time and hysteresis Failure annunciation On Off PID duty cycle or pulsed frequency control Wash Contact can be used to start manual or interval time wash cycles Hold Contact can be used to signal the Hold situation Fail Contact 54 is programmed as fail safe contact Note When contact output current is more than 4 Amps ambient temperature should be less than 40 C F Contact input Remote wash cycle start IM 12B07C05 01E G Temperature compensation Function H Calibration I Logbook J Display K Shipping details Package size Package weight Converter weight L Housing Colour PH450G A D A PH450G A D U Automatic or manual Compensation to Nernst equation Process compensation by configurable temperature coefficient NEN6411 for water or strong acids bases or programmable matrix Semi automatic 1 or 2 point calibration using pre configured NIST US DIN buffer tables 4 7 amp 9 or with user defined buffer tables with automatic stability check Manual adjustment to grab sample Software record of important events and diagnostic data readily available in the display or through HART Graphical Quarter VGA 32
92. rminate 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 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 suitable crimp terminals and identify with numbers as shown Finally shrink the overall heat shrink tube into position 9 cm remove insulation Figure 3 13 a A sE e ur 9 Cc Figure 3 13 b Dv OOo EE e EE CS Ny PNAS SAS SAS gt cotton threads Figure 3 13 c IM 12B07C05 01E 4 OPERATION OF EXAxt PH450G 19 4 1 Main display functions Tag EXAxt PH450 Q lez Goto trend screen 1 00 Goto zoom screen C259 Jc ei Goto status screen 2360 mv A m Di Go to maintenance screen Figure 4 1 Main Display A heart mark is lit on the right upper corner of the screen when HART communication is active An X mark is lit when HART communication is abnormal Noth
93. rom 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 This is separated from input ground by a galvanic isolation The size of conductors should be at least 1 25 mm2 The overall cable diameter should be between 6 amp 12 mm ERGOE t N L POWER POWER 100 240 VAC 15 VA 50 60Hz FUSE 500 mA 250 VAC T 12 24 V 10 W FUSE 2A 250 VAC T DC AC SOA 52 St 53 72 71 73 100VA 50W NC C NO NO C NC 52 CONTACTS S3 S4 fail safe 15 16 IMP Sat IN SHLD IN INPUT 1 IMP 13 La LOW LE INPUT 2 SENSOR S LOW 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 M4 screw Figure 3 8 a External grounding 3 4 Wiring the contact signals 3 4 1 General precautions The contact output signals consist of volt age 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
94. rval of 10 minutes The HOLD flag will be cleared and all outputs will function normally IM 12B07C05 01E Display setup 7 Main display rend Graph Screen amp X axis Timing Y axis Limits Auto Return 10 min Parameter pH low pH high ORP low ORP high rH low rH high Temp low Temp high Main display pH Empty Additional text 10 min Disabled low high 14 00 pH low 0 0 C high 100 0 C Default values 0 pH 14 pH 1500 mV 1500 mV inf inf 0 C OF 100 C 100 F 39 IM 12B07C05 01E ONINOISSIININOO AYNLONHLS NNAW H 40 6 CALIBRATION 6 1 Calibration check with buffer solutions The following tips will help to produce a good calibration 1 Before starting a calibration make sure the electrode system is properly cleaned so that the electrodes are fully functional They must then be rinsed with clean water to avoid con tamination of the calibration solution s 2 Always use fresh buffer solutions to avoid the possibility of introducing errors from contami nated or old solutions Buffers supplied as liq uids have a limited shelf life especially alkaline buffers which absorb CO2 from the air 3 Yokogawa strongly recommends NIST primary buffer standards in order to ensure the best accuracy and best buffer capacity is available Commercially adjusted buffers e g 7 00 9 00 or 10 00 pH are a compromise as a standard and are oft
95. s 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 A DANGER Cables that withstand temperatures of at least 70 C should be used for wiring Wiring work should be performed to meet IP66 or higher requirements Tighten four frontplate screws to 1 5 N m torque 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 HART 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 A CAUTION Do not turn on power with the touchcsreen pressed otherwise inaccurate screen positioning will occur If it occurs leave the touchscreen unpressed turn off power then on again The screen positioning will be accurate IM 12B07C05 01E 8 3 2 2 Cables Terminals glands and conduit adapter PH450G A D A The PH450 is supplied with terminals suitable for the connection of finished wires in the size range of 0 13 to 2 5 sq mm 26 to 14 AWG The cable glands supplied will form a tight seal on cables with an outside diameter of 6 t
96. s one of the most important diagnostic tools for keeping the measurement in good condition If the value exceeds a user defined limit 10000 1000kQ an error mes sage will be displayed IM 12B07C05 01E 4 3 7 Last calibrated the date on which the last sensor calibra tion is done The displayed value of the ZERO is the result of this calibration The displayed value of Slope is not necessarily calibrated on this date only if the last calibration was a 2 point calibration 4 3 8 Calibration due the date when the calibration must be done according to the settings of the maintenance timer This is based on scheduled maintenance procedures The maintenance intervals are set in menu setup gt gt Commissioning measurement setup calibration settings gt gt limits and timing 4 3 9 Projected calibration the date when the predictive maintenance function expects that recalibration of the sen sor unit is necessary for good measurement accuracy The converter checks the reference impedance every hour The user is notified when maintenance should take place Prior to calibration the sensor should be well cleaned and rinsed Hi limit Low limit 4 3 10 Projected replacement the date when the predictive maintenance function expects that replacement of the sensor is necessary for good measurement accuracy After each calibration the slope zero and reference impedance are logged Aging of the sensor can be dete
97. setup is chosen special care Note should be taken in reference to scaling when the wash cycle is terminated In this configuration manual wash is not applicable Diagnostics The response time is a good diagnostic tool to see the condition of the electrode system During the recovery time the response is moni tored and an error is generated when the half time value was not reached within 1 3 of the recovery time i GOOD SENSOR AGED SENSOR Figure 6 2 Chemical cleaning of sensors Input Contact The input contact is always enabled when an output contact is configured as wash The input contact can be used to enable a wash after the detection of an Impedance High error 7 MAINTENANCE 43 7 1 Periodic maintenance The converter requires very little periodic main tenance 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 The pH measurement uses high impedance sen sors and may otherwise be prone to problems caused by exposure of the cir
98. te by interpolation and extrapolation Consequently there is no need for a 10096 coverage See Appendix 3 for matrix interpolation NEN6411 This is a NEN standard and applicable for many applications It s used for pH compen sation in water applications using a glass electrode The calculation is base on Ultra Pure Water UPW and is also valid for all strong acids and strong bases The main application is in demiwater and boiler feed water condensate When the right buffer tables are entered automatic calibration is the easiest and most reliable calibration method to use The calibration is performed in several steps each clearly indicated by the user interface Each measurement point needs to be stable before proceeding The parameters for this stability check are set in Commissioning gt gt Calibration settings gt gt Limits and timing We advice to leave the sensors for 3 5 min utes in the buffer solution before proceeding even when the measurement is stable This will give reliable and accurate calibration results 6 4 Sample calibration mode This mode is used first to record an instantane ous value for a grab sample The sample value is held in memory and normal measurement and control can continue while the sample is analyzed Following the analysis re enter the Sample calibration mode The original value from memory is displayed The recorded reading is simply adjusted to agree with the analyzed value The sa
99. that complements the present topic S This symbol indicates Protective Ground Terminal l This symbol indicates Function Ground Terminal Do not use this terminal as the protective ground terminal RDS This symbol indicates Alternating current This symbol indicates Direct current Warranty and service Yokogawa products and parts are guaran teed 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 Dam age 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 defec tive goods should be sent freight paid to the service department of the relevant sales organisation for repair or replace ment at Yokogawa discretion The fol lowing information must be included in the letter accompanying the returned goods e Part number model code and serial number Original purchase order and date Length of time in service and a description of the process Description of the fault and the circumstances of failure Process environmental conditions that may be related to the failure of the device A statement wheth
100. til 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 100926 IM 12B07C05 01E 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 state error Proportional control can also produce excessive overshoot and oscillation Too much gain may result in an unstable or oscillating process Too little gain results in a sustained steady state error Gain 1 Range PV units Integral control Integral control is used to eliminate the steady state error and any future process changes It will accumulate setpoint and process load changes by continuing to adjust the output until the error is eliminated Small values of integral term I time in seconds provide quick compensation but increase overshoot Usually the integral term is set to a maximum value that provides a compromise between the three sys tem characteristics of
101. trix During this process it will check if the matrix is completely ascending descend ing This is necessary as otherwise the lookup function can give two results for one tempera ture If an error is found the EXAxt will specify the location of the error as shown in the user interface screen above The backspace key should be used for delet ing an individual matrix value An empty value is shown as IM 12B07C05 01E Matrix lear matrix No action heck values No action Columns not ascending Location Tmin Solution 2 z No action 57 Appendix 4 Control drawing for FM approval Model PH450G SC450G ISC450G Date February 28 2007 7 Drawings 7 1 Control Drawing Non hazardous Location Jass I Div 2 PH450G SC450G ISC450G Sensor Power Supply 100 240VAC AC version 12 24VDC DC version Q Q Sensor Inputs PH450G Relay Contacts I Q 5 S INPUT 2 Input Contacts e 14 LE 12 TEMP 11 TEMP SC450G mA Outputs Q Q I ELECTRODE 1 13 INNER Not used 1 Noincendive field wiring parameters for Sensor input WARNING Substitution of components may impair suitability for Division 2 Do not remove or replace while circuit is live unless area is know to be non hazardous Explosion Hazard Do not disconnect equipment unless area is know to be non hazardous Do not reset circuit breaker unless power has been re
102. ulation Percentage 096 10096 IM 12B07C05 01E ONINOISSIININOO AYNLONHLS NNAW H 34 5 11 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 classified as FAIL immediate action is required The proc ess variable is not reliable WARN the process variable processes by the converter 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 Com missioning gt gt output setup will be ener gized continuously All the other contacts are inhibited Exception is the contact configured for Wash Wash cycles are not interupted as this might cause scaling fouling to the electrodes 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 converter continues to work normally A good example is a time out warning that the regular maintenance is due The user is noti fied but it should not be used to shut down the whole measurement 5 12 Logbook configuration General Logbook is available to keep an electronic record of events such as error messages calibrations and programmed data changes By reference
103. ure 3 9a shows the jumper positions related to the types of measurement stated in Table 3 1 For Low impedance the Low should be shorted by a jumper See drawing below When shipped two jumpers are placed in a plastic bag and supplied with the product Typi cal setting for pH measurement 13 is shorted to become a low impedance input Unused jumpers should be stored in jumper holders in the cover as shown in Figure 3 9b Jumper Settings Application amp Sensor Connections Normal pH sensors including FU20 Glass sensor on Input 1 Reference sensor on Input 2 Special electrodes using 2 glass sensors e g Pfaudler ORP Redox measurement Metal sensor on Input 1 Normal reference on Input 2 ORP pH compensated or rH measurement Metal sensor on Input 1 Figure 3 9a Jumper placement for low impedance setting IM 12B07C05 01E pH glass as reference on Input 2 Figure 3 9b Jumper holders in cover AN 13 3 7 Sensor wiring 3 7 1 Connection cable Refer to figure 3 10 which includes drawings The coaxial cable has two connections that outline sensor wiring The EXAxt 450 can be used with a wide range core of commercially available sensor types both shield from Yokogawa and other manufacturers The sensor systems from Yokogawa fall into two categories the ones that use a fixed cable and
104. y the zero asymmetry 2 A second point can be set to determine the slope sensitivity Calibration pH zero slope Automatic zero slope Sample Temperature calibration Start manual wash cycle pH automatic NIST buffer Buffer 4 01 pH 23 1 C 3 97 pH 23 1 C CHECKING STABILITY pH automatic NIST buffer Buffer 4 01 pH 23 1 C 3 97 pH 23 1 C Reading now stable CGoto buffer 2 Calibration complete Note When the right buffer tables are entered automatic calibration is the easiest and most reliable calibration method to use The calibration is performed in several steps each clearly indicated by the user interface Each measurement point needs to be stable before proceeding The parameters for this stability check are set in Commissioning gt gt Calibration settings gt gt Limits and timing We advice to leave the sensors for 3 5 min utes in the buffer solution before proceeding even when the measurement is stable This will give reliable and accurate calibration results 6 4 Sample calibration mode This mode is used first to record an instantane ous value for a grab sample The sample value is held in memory and normal measurement and control can continue while the sample is analyzed Following the analysis re enter the Sample calibration mode The original value from memory is displayed The recorded reading is simply adjusted to agree with the analyzed va

Model PH450G [Style: S2] pH and ORP Converter

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