User Manual
Contents
1. Application in hazardous locations of Zone 0 Conventions Used in this Manual 4754 7 1 The Model 913 X pH 11 Package contents 11 Intended use Short description EE 11 2 Operation Meter design 5 Display Keypad Sensoface electrode monitoring Connection and start up Configuration Calibration Measurement Data memory m BE CR e EEN cA A E Serial Interface Standard settings for ZU 0244 Lab Printer is Printing measured values and records EEN Troubleshooting 20 21 Sensoface electrode monitoring Error messages 4 Maintenance Changing the batteries Cleaning the meter EENEG Table of Contents 8 T E 5500 Specifications for Model 913 X pH Specifications for ZU 0244 Printer EC Type Examination Certificate Statement of Conformity EENEG EC Declaration of Conformity cce imer Connection for Measurement in Hazardous Area Zone 0 5 General Information on Measurement Notes2. Manual Portamess 913 and Portamess 913 X pH Knick gt Warranty Defects occurring within 3 years from delivery date shall be remedied free of charge at our plant carriage and insurance paid by sender Sensors and accessories 1 year Subject to change without notice Return of products Please contact our Service Team Ship the cleaned device to the address you have been given If the device has been in contact with process fluids it must be decontaminated disinfected before shipment In that case please attach a corresponding certificate for the health and safety of our service personnel Disposal Please observe the applicable local or national regulations concerning the disposal of waste electrical and electronic equipment Knick Elektronische Messgerate GmbH amp Co KG Beuckestr 22 14163 Berlin Germany Tel 49 30 80191 0 Fax 49 30 80191 200 Internet http www knick de knick knick de Changes for Software Version 3 In addition to one and two point calibration the meter can perform a three point calibration Three point calibration must be activated in a new configuration step 3P CAL On OFF see page 20 During calibration you can stop the procedure after each completed buffer evaluation by pressing the meas key Depending on the number of buffer evaluations made the meter performs a one two or three point calibration With three point calibration t
3. un Pronk HBu uu display r oL Time and date format 2400 dREE To protect the batteries the meter switches off automatically when not operated for a longer time You can select whether switch off is to take place after one hour or after twelve hours factory setting 1 hour If the data logger is active and during remote interface operation the auto switch off feature is disabled If the Portamess 913 X pH is controlled by a PC and interface conflicts occur when the print key is pressed you should deactivate the print function Print OFF factory setting Print On 4 800 bauds The transmission speed can be set to 600 1200 2400 4800 or 9600 bauds The transmission speed must correspond to that set in the printer or PC Data format and protocol are permanently set to 7 bits one stop bit even parity and XON XOFF protocol NAMUR 28 The temperature can be displayed either in or F factory setting The time and date format can be set to either 24 hours and day month year or 12 hours am pm and month day factory setting 24 hours and day month year Operation 21 Calibration Calimatic automatic calibration Note d By calibration the pH meter is adjusted to zero point and slope of the electrode used For calibration using Calimatic automatic buffer
4. SA Temperature p a m a detection using Clock d EE udis Pt1000 NTC no Ie OO OOo lene TOW LAO Error message E Manual y Main temperature d Secondary display detection Write display memory Keypad Pressing on off switches the meter on or off When the meter is switched off one of the Sensoface status indicators is visible in the display After power on the meter automatically performs a self test and checks which temperature detector is connected After that it automatically goes to pH measuring mode Note You can also switch the meter on by pressing meas m However in this case only a short test is performed and the temperature detector is not identified The meter assumes that the last temperature detector identified is used a Pressing meas returns the meter to measuring mode from any function Pressing meas while in measuring mode selects the desired measured variable pH or mV for the main display Operation 14 clock 5 0 RCL print print print Note H For manual temperature specification no temperature detector connected the temperature is set using A and v These keys are also used to set the clock to select the memory locations and to edit selected parameters Pressing cal starts calibration With calibration the meter is adjusted to the electrode You can choose between one or two point calibration eith
5. W SLOPE This Sensoface display provides information on the electrode zero point and the slope ZERO WS lt gt Zeroand slope of the electrode are still okay however the electrode should be maintained or replaced soon lt gt Zero and or slope of the electrode have reached values which no longer ensure proper calibration It is advisable to replace the electrode Note The zero and slope values are determined during calibration Therefore the condition for accurate information is proper calibration For this reason always use fresh buffer solutions Using the calibration timer you set an interval within cal aa Which calibration should take place The calibration timer continues to run with the meter switched off Zeroand slope of the electrode are still okay however the electrode should be maintained or replaced soon lt gt Zero and or slope of the electrode have reached values which no longer ensure proper calibration It is advisable to replace the electrode Troubleshooting 36 Error messages Sensor problems ERROR 1 ERROR 2 ERROR 3 Note If there are problems with a sensor an error message appears and the measured value display flashes Problem with the electrode Possible causes Electrode defective Too little electrolyte in the electrode Electrode not connected Break in electrode cable Wrong electrode connected Measured pH less than 2 or great
6. reference electrolyte junction glass membrane Two buffer solutions are required for a two point calibra tion The pH values of the buffer solutions should differ by at least two pH units and bracket the expected measured value To ensure measurement accuracy the buffer solutions should be fresh Therefore never pour used buffer solution back into the storage container Never use used buffer solution Never immerse the electrode directly in the storage container Always keep the storage container closed The carbon dioxide from the air can lead to incorrect buffer solution values The problems described above can be avoided by using buffer bags see Accessories on page 43 Make sure that the buffer values are entered for the proper temperature Do not enter the nominal buffer value but instead the pH of the buffer solution at the calibration temperature Information on Measurement 57 Electrodes Today combination electrodes are commonly used due to the simpler handling involved When using individual electrodes make sure that they are connected to form a symmetrical system The dissipation systems of glass and reference elec trodes have the same potential e g both Ag AgCl KCI 3 mol l AgCl saturated or both calomel KCI saturated Only combine Thalamide glass electrodes with Thalamide reference electrodes The nominal zero point of commercially available electrodes is pH 7
7. Note For additional information refer to the appropriate m electrode instruction manual Electrode care Proper cleaning and care increases electrode service life and measurement accuracy Therefore you should observe the following points When not in use store electrodes in KCI solution refer ence electrolyte Never store them dry For a few hours the electrode can also remain in the sensor quiver without liquid Soak dry electrodes in solution for up to 12 hours prior to initial use For electrodes with liquid electrolyte open the KCI filling hole for calibration measurement and cleaning Make sure the electrolyte in the electrode is always at least 2 cm 1 higher than the medium to be measured Top up the KCI solution if necessary Use the KCI solu tion specified by the manufacturer For example for the SE 102N electrode use only KCI solution 3 contained in calibration buffer set To remove grease or oil you can use hot water and a household dishwashing liquid strong pollutions can carefully be removed using household scouring agent Information on Measurement 58 Temperature compensation Note m Protein contaminations can be removed by soaking the electrode in a pepsin hydrochloric acid solution elec trode cleaner for one hour Do not rub the electrode dry with a cloth or fleece as this will cause electric charging which may later result in incorrect measurements or even ma
8. Remove the old batteries from the battery holder Insert the new batteries in the specified direction Make sure the protective cover is in the notches provided and the rubber seal is correctly seated especially near the pH socket Remount the lid and secure it with the screws Be sure to tighten the screws thoroughly Remount the sensor quiver When changing the batteries all calibration and configu ration data are retained The calibration timer runs out Time and date must be reset The meter switches to pH measurement as does the event controlled data logger The current memory location is set to 00 Maintenance 41 Caution A If you want to store the meter for a longer time the batteries must always be removed beforehand Leaky batteries may damage the meter Cleaning the meter Caution To remove dust and dirt the external surfaces of the meter may be cleaned with water and also with a mild household cleaner if necessary Beware of electrostatic charging when using the meter in hazardous areas For example never wipe the meter with a dry cloth Maintenance 42 Accessories Ref No Printer ZU 0244 Printer paper 5 rolls ZU 0249 Printer ribbon 5 ribbons ZU 0250 Sensor quiver 5 pieces for leak proof storage ZU 0262 of pH sensor Calibration buffer set with 250 ml each of ZU 0261 Knick technical buffer solutions pH 4 7 9 and Knick technical
9. Temperature compensation 59 Temperature display C F 21 Temperature manual 27 Temperature probe connection 16 Index 63 Three point calibration automatic 23 Three point calibration configuration 20 Three point calibration manual 25 Time format 21 Time setting 31 Troubleshooting 35 Two point calibration automatic 23 Two point calibration manual 25 Warranty 2 Write memory 28 7 Zone 0 connection 53 Zone 0 precautions 6 Index 64 65 66 193 104 05 20120919 Software version 3 x 084088
10. and the meter returns to measuring mode Pressing meas exits the data logger mode Tos meas Data logging modes After pressing STO logging is continued after the P memory location in which the last measured value was ranger stored continue Press meas to exit logging ri After pressing STO the entire data memory is cleared LLT without starting the data logger clear LULLE After pressing STO the entire data memory is cleared d L re Storage begins from memory location 00 start LAGLE Press meas to exit logging Operation 29 Setting the data logger parameters n y ru LOLLE In the parameter setting mode you select whether data logging is to be interval controlled event controlled or manual Press STO to access the logging functions To select interval controlled logging of measured values press STO and set the interval in which the recording is to take place using a and v The interval range is between 5 seconds and 60 minutes Default time factory set is 2 minutes After selecting your interval time press STO to enter the value With event controlled data logging a measured value is not saved until it deviates from the last memory value by the preset differential value Using the time which is also stored you can determine when the value has changed The differential value is entered in the subsequent paramete
11. calibration timer the period of time can be specified within which calibration should occur The interval range is 0 to 1 000 hours When approx 80 96 of the preset interval has passed the calibration timer switches the Sensoface display from to When the total interval has run out the display is set to The timer is reset with a calibration To switch off the calibration timer enter O as the inter val Factory setting calibration timer off You can select whether you wish to calibrate with the Calimatic automatic buffer recognition system or with manual entry of the individual buffer values When calibrating with Calimatic automatic buffer rec ognition AutCal On you only have to enter the buffer set used once in the configuration menu The buffer values are stored at the correct temperature During calibration the meter then automatically recognizes the buffer used factory setting automatic calibration on Knick technical buffers Select the buffer set with the buffers used in the buffer set selection Various calibration buffer sets are stored in the Portamess 913 X pH The following buffer sets are permanently stored in the meter BUFFER 00 Knick technical buffers 2 00 4 01 7 00 9 21 BUFFER 01 Mettler Toledo technical buffers former Ingold pH2 00 4 01 7 00 9 21 BUFFER 02 Merck Riedel 2 00 4 00 7 00 9 00 12 00 BUFFER 03 DIN 19 267 pH 1 09 4 65 6 79 9 23
12. in Annex ll to the Directive The examination and test results are recorded in the confidential report PTB Ex 01 20452 Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 50014 1997 1 A2 EN 50020 1994 EN 50284 1999 If the sign X is placed after the certificate number it indicates that the equipment is subject to special conditions for safe use specified in the schedule to this certificate This EC type examination Certificate relates only to the design examination and tests of the specified equipment in accordance to the Directive 94 9 EC Further requirements of the Directive apply to the manufacturing process and supply of this equipment These are not covered by this certificate The marking of the equipment shall include the following 12 4 0 EExiallC T4 T6 Zertifizierupgsst lle Kee Braunschweig January 24 2002 By orde ANIS Oe 4 Dr Ing ree Regierungsdirektor sheet 1 3 EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the Physikalisch Technische Bundesanstalt In case of dispute the German text shall prevail Physikalisch Technische Bundesanstalt Bundesalle 100 D 38116 Braunschweig EC Type Examination Certificate 46 Physikalisch Technische Bundesanstalt Bra
13. on pH 5 Table of Contents 9 10 1 Model 913 Package contents Please check the completeness of the shipment after unpacking The package should include Portamess 913 X pH incl batteries and sensor quiver Carrying strap User manual Quickstart instructions German English and French Interface cable incl adapter Paraly transfer program Intended use Short description The Portamess 913 X pH is used for pH and temperature measurement in industry environment food processing and waste water treatment Operation of the Portamess 913 X pH is also permitted in hazardous areas Zone 1 The meter meets the EMC requirements of 89 336 EEC and the recommendations as per NAMUR NE 21 The meter is IP 66 protected to EN 60 529 jet water from all directions Temperature compensation is automatic with a Pt 1000 temperature detector an NTC 30 auto matic recognition during power on or through manual temperature input Calibration can be carried out with buffer solutions from various preselectable buffer sets The buffer is then automatically recognized by the Calimatic The Model 913 X pH 11 You can also calibrate manually enterin
14. recogni tion you only have to enter the buffer set used once in the configuration menu With the patented Calimatic system the meter automatically recognizes the buffer solutions calculates the electrode zero point and slope based on 25 C and carries out the corresponding adjustment It does not matter which buffer solution is taken first The meter can only operate properly when the buffer solutions used correspond with the buffer set selected in the configuration menu Other buffer solutions even with the same nominal val ues may demonstrate different temperature behavior which leads to measurement errors Pressing cal activates calibration Calibration can be exited by pressing meas If exited prior to entry of the first calibration point zero and slope of the last calibration are displayed for a moment Immerse electrode and temperature detector in the first buffer solution This can be any of the selected solutions m Press cal again to calibrate to the first buffer solution r HI If you do not want to calibrate press meas to cancel the AL process lin E During buffer recognition the lower line indicates the temperature while the hourglass indicator flashes d P Z The nominal value of the recognized buffer solution is nn displayed for approx 5 s Electrode and temperature pH 25 A detector must remain the first buffer solution until the display prompts for
15. subject to approval by the Physikalisch Technische Bundesanstalt In case of dispute the German text shall prevail Physikalisch Technische Bundesanstalt Bundesallee 100 D 38116 Braunschweig EC Type Examination Certificate 48 Knick gt Statement of Conformity Knick Elektronische Messger te Erkl rung G ltigkeit der EG Baumusterpr fbescheinigung GmbH 8 Co KG Declaration Validity of the EC Type Examination Certificate Beuckestr 22 D claration Validit de l attestation d examen CE de type D 14163 Berlin Dokument Nr Document No EB120718A No document Produktbezeichnung Batterie pH Meter Portamess Typ 91 X pH Product identification D signation du produit EG Baumusterpr fbescheinigung PTB 01 ATEX 2162 X EC Type Examination Certificate Attestation d examen CE de type Eine oder mehrere der in der EG Baumusterpr fbescheinigung PTB 01 ATEX 2162 X genannten Normen wurden durch neue im g ltigen Amtsblatt der Europ ischen Union aufgef hrten Normen oder Normenausgaben ersetzt One or more of the standards mentioned in the EC Type Examination Certificate PTB 01 ATEX 2162 X have been replaced with new standards or new editions of standards as listed in the Official Journal of the European Union Une ou plusieurs des normes cit es dans l attestation d examen CE de type PTB 01 ATEX 2162 X ont t remplac es par de nouvelles normes ou versions
16. the possibility to evaluate a third buffer solution after two point calibration has been completed With three point calibration turned off 3P CAL OFF see page 20 the calibration procedure is automatically exited at this point With three point calibration turned on 3P CAL On you can now evaluate a third buffer solution For two point calibration press meas to terminate the calibration The meter then shows the newly deter mined zero point in the main display and the new slope in the lower display and returns to pH measuring mode If you want to perform a three point calibration immerse the electrode and temperature detector in the third buffer solution Enter the pH value of the third buffer solution Press cal to continue the calibration The calibration process runs again as for the previous buffers and is automatically terminated Zero and slope are calculated using a mean straight line to DIN 19268 At the end of the calibration the zero point and slope based on 25 of the electrode are displayed Then the meter switches back to measuring mode Operation 25 Converting slope gt mV pH mV pH 96 mV pH 78 462 91 53 9 79 468 92 54 5 80 47 4 93 55 1 81 48 0 94 55 6 82 48 5 95 56 2 83 49 1 96 56 8 84 497 97 574 85 50 3 98 58 0 86 50 9 99 58 6 87 51 5 100 592 88 52 1 101 598 89 52 7 102 60 4 90 53 3 103 61 0 Oper
17. trode allows to optimally use the advantages of the microprocessor controlled pH meter Combination elec trodes with integrated temperature detector e g Model SE 101N or SE 102N are particularly advantageous Calibration and measuring characteristics of pH electrodes are dif measurement ferent for each electrode are variable and temperature dependent Therefore the meter must be adjusted to the characteristics of the current electrode This process is called calibration For calibration you take measurements of buffer solu tions These are solutions with exactly defined pH values The Portamess 913 X pH provides two calibration modes automatic calibration using Calimatic and manual calibration Information on Measurement 54 Calimatic automatic calibration Note Manual calibration Note 2 In the Portamess 913 X pH the table values of various buffer sets are stored for the correct temperatures Simply select and enter the buffer set once during initial start up see page 20 Then the patented Calimatic will calibrate the meter at the press of a key Calibration is conducted with two different buffer solutions from the selected buffer set The sequence of buffers is irrelevant The pH meter measures the electrode voltages and the temperatures and compares them with the programmed pH temperature tables for the buffer solutions From the measured values the meter calcu lates the zero poin
18. 12 75 BUFFER 04 Ciba 94 2 06 4 00 7 00 10 0 Operation 19 Note d BUFFER 05 NIST pH 1 68 4 00 7 00 10 01 12 46 BUFFER 06 DIN 19 266 and NIST NBS pH 1 679 4 006 6 865 9 180 BUFFER 07 HACH pH 4 00 7 00 10 18 Aut CAL Three point The meter can only operate properly if the buffer solu tions used correspond to the selected activated buffer set Other buffer solutions even those with the same nominal values demonstrate a different temperature behavior This leads to measurement errors For manual buffer specification AutCal OFF the pH value of the buffer solution must be entered for the correct temperature This allows calibration using any other buffer solutions You can choose whether you want to perform three calibration point calibration in addition to one or two point on off calibration With three point calibration turned on 3P Cal On you A n can calibrate with a third buffer solution after two Beta point calibration has been completed sequence of en the buffer solutions is unimportant With three point calibration zero point and slope are calculated using a mean straight line to DIN 19268 With three point calibration turned off 3P Cal OFF only one two point calibration is possible default setting 3P ERL 3P Cal OFF Operation 20 Automatic switch off h Auk OFF Interface
19. 30 kQ automatic recognition during power on or manual Data memory 100 memory locations pH mV temp time date Data logger Manual interval or event controlled Remote interface Serial RS 232 interface bidirectional asynchronous baud rate user definable can be used as either printer or computer interface Data retention Configuration and calibration data gt 10 years Auto switch off After either 1 or 12 hours Appendix 44 Emitted interference 61326 Class Immunity to interference EN 61326 EN 63326 A1 and NAMUR NE 21 Explosion protection 913 X pH only ll 2 1 G Ex ia IIC T3 T4 Ga 01 ATEX 2162 X FM IS Class Div 2 Group A B C D T4 Ambient temperature Operation 10 to 50 3 10 to 40 T4 Transport and storage 20 to 70 Power supply 3 AA LR 6 batteries alkaline manganese For hazardous area applications Temperature class T4 10 40 C Duracell MN1500 Temperature class 10 50 C Energizer E91 Power One 4106 Panasonic Pro Power LR6 See page 5 Operating time approx 2 000 h clock mode gt 2 years Enclosure Material PA IP 66 protected with integrated sensor quiver Dimensions 133x 160x 30 mm wxh x d Weight Approx 560 g including batteries 1 Due to storage the service life of the included batteries may be shorter Specifications for ZU 0244 Pr
20. ation 26 Measurement Measuring mode fei meas Note d Manual temperature specification Pressing meas accesses the measuring mode from all functions In the measuring mode the main display indicates the measured variable and the secondary dis play shows the temperature The measured variable is selected with meas You can choose between the following variables pH Electrode potential mV The response times of electrode and temperature detec tor are considerably reduced if you first move the elec trode in the buffer solution and then keep it still to read the values This provides stable values more quickly The man indicator signals that no temperature detec tor is connected The meter operates with the manually specified temperature The specified temperature can be edited using A and v Operati on 27 STO pH Pro Si a amp ra Up to one hundred measured values can be stored in the data memory together with temperature date and time Storage is performed either manually or automatically using the data logger The currently measured value pH or mV is stored Write memory At pressing STO the currently measured value is shown in the display HOLD Now you can select any memory location using A and v Press STO to store the measured value in the selected memory location After storing the mem
21. ature set for manual temperature specification Electrode used has different nominal zero point The electrode slope determined during calibration lies outside the permissible range The slope is less than 78 96 or greater than 103 96 This message appears in measuring mode follow ing a calibration It can only be remedied by recalibration with fresh buffer solutions Possible causes Electrode worn out Buffer solutions unusable or falsified Buffer does not belong to configured buffer set Temperature detector not immersed in buffer solution for automatic temperature compensation Wrong buffer temperature set for manual temperature specification Electrode used has different nominal slope Troubleshooting 38 ERROR 8 ERROR 9 ERROR 10 ERROR 11 The meter has recognized two identical buffer solutions This message is only displayed during calibration Calibration must be repeated with fresh buffer solutions Possible causes Same or similar buffer solution was used for both calibration steps Buffer solutions unusable or falsified Electrode defective Electrode not connected Break or short circuit in electrode cable The meter cannot recognize the buffer solution used This message is only displayed during calibration Calibration must be repeated with fresh buffer solutions Possible causes Buffer does not belong to configured buffer set Electrode defective Electr
22. ay only be used briefly in portable application in containers with Zone 0 The Model ZU 6979 X0 pH Pt1000 combination electrode may only be used for portable application in the hazardous area Zone 0 when the ground terminal is connected to the local equipotential bonding see page 53 The Portamess 91 X pH portable pH meter itself handheld unit may only be used in hazardous areas Zone 1 Application in Hazardous Locations of Zone 0 6 Conventions Used this Manual Caution A Warning A ITALICS are used for texts which appear in the Portamess 913 X PH display Bold print is used to represent the texts of keys e g cal Display examples or keys whose functions are explained are frequently shown in the left hand column Notes provide important information which should always be observed when using the meter Caution means that the instructions given must always be followed to prevent malfunctions or damage to the device Warning means that the instructions given must always be followed for your own safety Failure to follow these instructions may result in injuries Conventions Used in this Manual 7 Table of Contents Safety 5 4 Be sure to read and follow these instructions ss 4 Additional safety notes for
23. buffer pH 4 set of 30 bags for ZU 0263 one calibration each Knick technical buffer pH 7 set of 30 bags for ZU 0264 one calibration each Knick technical buffer pH 9 set of 30 bags for ZU 0265 one calibration each solution 250 ml ZU 0062 Sensors pH Pt 1000 combination electrode SE 101N Body plastic 110 mm pH Pt 1000 combination electrode SE 102N Body glass 110 mm pH combination puncture electrode SE 104N Body plastic 99 mm Pt 1000 temperature probe ZU 0156 Appendix 43 Specifications for Model 913 X pH Ranges pH 2 00 to 16 00 mV 1 300 to 1 300 20 0 to 120 0 Display LC display 35 x 67 mm character height 15 mm Measurement cycle Approx 1 s Measurement error 0 01 1 count mV 0 1 96 meas value 0 3 mV lt 0 3K Input DIN 19 262 Input resistance gt 1 1012 Input current lt 1 10 2 20 C Electrode Calimatic automatic calibration with automatic buffer standardization recognition German patent 29 37 227 Manual electrode standardization Meter and electrode monitoring Sensoface evaluates the calibration interval zero point electrode slope response time and glass impedance of the electrode optical indication good average poor Calibration timer monitors the calibration intervals configurable from 1 to 1 000 hours can be disabled Meter self test during power on Temperature compensation Pt 1000 NTC
24. changes with age and wear Glossary 60 Electrode zero point GLP meas NAMUR One point calibration pH electrode system Response time Sensoface Slope Three point calibration Two point calibration Zero point The voltage which a pH electrode gives off at a pH of 7 The electrode zero point is different for every electrode and changes with age and wear Good Laboratory Practice Rules for conducting and documenting measurements in the laboratory This key is used to return to measurement mode from all other levels In measuring mode it switches between mV and pH German committee for measurement and control standards in the chemical industry Calibration with which only the electrode zero point is taken into consideration The previous slope value is retained Only one buffer solution is required for a one point calibration A pH electrode system consists of glass and reference electrode If they are combined in one body they are referred to as combination electrode Time from the start of a calibration step to the stabilization of the electrode potential Automatic electrode monitoring The Sensoface indica tors provide information on the status of the electrode and the meter Calibration interval zero slope and response time of the electrode are evaluated See electrode slope Calibration in which the electrode zero and slope are taken into consideration Three buffer soluti
25. d interval can be given here However the calibration can be repeated frequently at the beginning If the calibration values electrode zero and slope show only minor differences the time between calibrations can be increased For measurements under constant conditions weekly calibration may be sufficient On the other hand calibra tion may be necessary prior to each measurement when measuring in media with large temperature or pH differ ences For monitoring the calibration interval you should configure the calibration timer see page 19 Observe the For electrodes with liquid electrolyte open the KCI fill following ing hole for calibration measurement and cleaning Immerse the electrode in the buffer solution ensuring that the junction is completely immersed Electrode response time is considerably reduced if you first move the electrode in the buffer solution and then keep it still to read the values Always rinse the electrode with deionized water before immersing it in the buffer solution If you calibrate without a temperature detector make sure that the manually set temperature matches the actual temperature of the buffer solutions and the substance to be measured Note For additional information refer to the electrode i instruction manual Information on Measurement 56 Buffer solutions Note Note Note b 5 Design of a combination electrode with liquid electrolyte Los filling hole
26. de normes mentionn es dans le Journal officiel de l Union europ enne en vigueur Wir die We Nous Knick Elektronische Messger te GmbH amp Co KG Beuckestr 22 D 14163 Berlin erkl ren hiermit auf Grund eines Normenvergleiches dokumentiert in CL120326A f r das g Produkt die bereinstimmung mit den im g ltigen Amtsblatt der Europ ischen Union aufgef hrten harmonisierten Normen oder Normenausgaben herewith declare on the basis of a comparison of standards as documented CL120326A that the above mentioned product complies with the harmonised standards or editions of standards listed in the Official Journal of the European Union d clarons par la pr sente sur la base d une comparaison des normes qui est document e dans CL120326A que le produit mentionn ci dessus est conforme aux normes ou versions de normes harmonis es sp cifi es dans le Journal officiel de l Union europ enne en vigueur Die angewandten harmonisierten Normen oder Normenausgaben sind in der EG Konformit tserkl rung aufgef hrt The applied harmonised standards or editions of standards are shown in the EC Declaration of Conformity Les normes ou versions de normes harmonis es appliqu es sont num r es dans la d claration de conformit CE EG Konformitatserklarung EG120718A EC Declaration of Conformity D claration de Conformit CE Das o g Produkt stimmt weiterhin mit den Forderungen der Richtlinie 94 9 EG berein The above menti
27. do not have to enter it for the next calibration which must be performed at the same temperature If the temperature has changed the pH value must be adjusted before proceeding The response times of electrode and temperature detec tor are considerably reduced if you first move the elec trode in the buffer solution and then keep it still to read the values This provides stable values more quickly ES The electrode stability is checked and the measured mV value displayed Stability check be overridden by 2507 pressing cal However this reduces calibration accuracy Operation 24 Note d re r HI LML St nr pH S 100 Calibration with the first buffer is complete Remove electrode and temperature detector from the first buffer solution and rinse off both thoroughly If you want to perform one point calibration press meas to terminate the calibration now The meter then shows the newly determined zero point in the main display and the old slope in the lower display and returns to pH measuring mode For two point calibration immerse the electrode and temperature detector in the second buffer solution Enter the pH value of the second buffer solution Press cal to continue the calibration The calibration process runs again as for the first buffer Only with three point calibration turned on 3P CAL On see page 20 the calibration menu offers
28. er than 16 Problem with the electrode Possible causes Electrode defective Electrode not connected Break in electrode cable Measured electrode potential is less than 1 300 mV or greater than 1 300 mV Problem with the temperature detector Possible causes Temperature detector defective Short circuit in temperature detector Wrong temperature detector connected Measured temperature less than 20 C or greater than 120 When changing the temperature detector also for electrodes with integrated temperature detector note that the tem perature detector type Pt 1000 NTC 30 is only recognized when the meter is switched on with on off Troubleshooting 37 Calibration If errors occur during calibration or if the determined elec error messages ERROR 4 ERROR 5 trode data are outside the valid range an error message appears ERROR 4 ERROR 11 The electrode zero point determined during calibration is out side the permissible range The zero point is less than pH 6 or greater than pH 8 This message appears in measuring mode following a calibra tion It can only be remedied by recalibration with fresh buffer solutions Possible causes Electrode worn out Buffer solutions unusable or falsified Buffer does not belong to configured buffer set Temperature detector not immersed in buffer solution for automatic temperature compensation Wrong buffer temper
29. er using Calimatic automatic buffer recognition or with manual buffer entry Pressing clock switches the meter into the clock mode All measurement processes are canceled and battery consumption is reduced to a minimum Pressing STO activates the data memory for writing measured values Pressing RCL activates the data memory for reading measured values Pressing print sends the currently measured value to a printer or PC Pressing RCL and print prints out the data stored in memory Pressing cal and print prints out the meter record Pressing cal on off simultaneously when the meter is switched off opens the configuration menu Keep the cal key depressed and then press the on off key When pressing two keys at the same time make sure that the key shown on the left is pressed first Operation 15 Sensoface electrode monitoring 000 The Sensoface automatic electrode monitoring system provides information on the electrode state Zero point slope response time impedance and drying out are evaluated In addition Sensoface reminds you to regularly calibrate the meter For more detailed information on the displayed electrode state and the individual evaluations of the parameters please see chapter Troubleshooting and Maintenance page 35 Connection and start up Sensor connection Connection assignment Commercially available electrodes with nominal electrode zero point of pH 7 and the f
30. erte Normen EN 60079 0 2009 D 38116 Braunschweig ExNB No 0102 Harmonised Standards EN 60079 11 2007 PTB 01 ATEX 2162 X Normes harmonis es EN 60079 26 2007 Kennzeichnung Designation Marquage 0044 112 1 Exia T3 T4 Ga Konformitatsaussage Statement of Conformity Attestation de conformit Knick Elektronische Messgerate GmbH amp Co KG Beuckestr 22 D 14163 Berlin 120718 EMV Richtlinie EMC directive 2004 108 EG Directive CEM Norm Standard Norme 7 Die Seherheistinweie de mitgalieferten Produkokumentaion sind zu beachten Bei einer mit dem Hersteller ich abgesimmten nderung des Ger tes undioder bei Nichtbeachtung Sicherheishinweise verliert diese Erkl rung ihre G ltigkeit Tho say stuctonstontamod in t documentation accompanying the product have to be observed I the apparatus is modified without having obtained manufacturers prior consent and or the safely instructions are not followed this declaration becomes void N est imp ratif de respecter les instructions s cunt dans la documentation fournie avec le produit En cas de modification de l appareil sans l accord du fabricant et ou en cas de non respect des instructions de s curit cette d claration perd sa vigueur Ausstellungsort datum Berlin 18 07 2012 Place and date of issue Lieu et date d mission Knick Elektronische Messger te GmbH amp Co KG Dr Dirk Steinm ller Leiter Mar
31. essing on off The meter can also be switched on with meas However in this case only a short test is performed and the temperature detector is not identified The meter assumes that the last temperature detector identified is used Operation 17 Configuration Note d meas If you calibrate using the Knick buffer set generally you do not have to change the configuration The following basic settings can be changed in the configuration Calibration timer interval Automatic calibration Calimatic on or off manual buffer set for automatic calibration Three point calibration on or off Automatic switch off after 1 hour or 12 hours Remote interface Printer output on off baud rate Temperature display or F Date and time format 24 hours and day month year or 12 hours am pm and month day year To activate the configuration hold down cal with the meter switched off and then press on off The menu items of the configuration menu are worked through in sequence To change the setting of the respective menu item press A Or v Pressing STO switches to the next menu item and saves the displayed settings Pressing meas exits the configuration menu at any time The value last displayed and possibly hanged will then not be saved Operation 18 Calibration timer Automatic or manual calibration ri Ln RuELCRL With the
32. eter Parameter Setting configuration Baud rate 4800 Printer On Printing measured values and records configuration Print On and the baud rate corresponds to Note Make sure that the print function is activated in the that of the printer Printing measured values Press print while in measuring mode to print out the print currently measured value The measured value is printed with temperature date time and a three digit identifica tion number The identification number is reset when the meter is switched off Printing the memory Press RCL and then print to print out the stored data All data points are printed with temperature date time and memory location number Sxx RCL gt print Printing individual data points RCL Press RCL Select the desired data point using A and v Press print to start printing Operation 33 Note d print I rj If Sensoface was 2 during data logging the memory location will be marked with and if the measurement range pH mV C was exceeded it will be marked with Printing the record To print out the meter record press cal then print The record printout contains a calibration record with the exact data from the last calibration the settings of the configuration menu a record of the last self test and alist of the current Sensoface criteria Operation 34 3 Troubleshooting Sensoface electrode monito
33. f Marketing and Sales Gesch lsf hrer Managing Director EC Declaration of Conformity 50 UII Knick gt EG Konformit tserkl ru ng Elektronische Messger te EC Declaration of Conformity GmbH amp Co KG 5 Beuckestr 22 D claration de Conformit CE D 14163 Berlin Dokument Nr DocumentNo EG120718A Aufbewahrung Keeping Garde en d p t No document J rgen Cammin KB Wir die We Nous Knick Elektronische Messger te GmbH amp Co KG Beuckestr 22 D 14163 Berlin erkl ren in alleiniger Verantwortung da dieses Produkt diese Produkte declare under our sole responsibility that the product products d clarons sous notre seule responsabilit que le produit les produits Produktbezeichnung Batterie pH Meter Portamess 911 X pH Product identification 913 X pH D signation du produit auf welche s sich diese Erkl rung bezieht mit allen wesentlichen Anforderungen der folgenden Richtlinien des Rates bereinstimmen to which this declaration relates is are in conformity with all essential requirements of the Council Directives relating to auquel auxquels se r f re cette d claration est sont conforme s aux exigences essentielles de la Directives du Conseil relatives ATEX Richtlinie ATEX directive 94 9 EG EG BoumusterUibeschenigug Type Examination Cerificate Directive ATEX Phi ysikalisch Technische Bundesanstalt Harmonisi
34. g smileys 35 Electrodes general 58 Error messages 37 Event controlled logging 30 Explosion protection 5 G General information on measurement 54 Glossary 60 H Hazardous area application 5 Hazardous area application Zone 0 53 Index 62 5 14 Intended use 11 Interface cable 33 Interface conflicts 21 Interface parameters 32 Interval controlled logging 30 K Keypad 14 M Maintenance 41 Manual calibration 24 Manual calibration configuration 19 Manual data logging 30 Manual temperature specification 27 Measuring mode 27 Memory function 28 mV measurement 27 One point calibration automatic 23 One point calibration manual 25 Operation 13 Order information 43 P Package contents 11 Paraly software 12 pH measurement general 54 Plugs 16 Printer cable 33 Printer settings 33 Printer specifications 45 Printing measured values 33 Printing the memory 33 Printing the record 34 R Read memory 28 Record printout 34 Remote interface 32 S Safety precautions 4 Safety precautions for hazardous areas Saving measured values 28 Sensoface electrode monitoring in brief 16 Sensoface messages 35 Sensor connection 16 Sensor problems 37 Sensor references 43 Serial interface 32 Short description 11 Slope values 26 Socket assignment 16 Specifications 44 Start up 17 Statement of Conformity 49 Storing the meter 42 T Technical data 44 Technical terms 60
35. g individual buffer values The Sensoface electrode monitoring system checks the connected electrode and provides information on its state The data logger records up to 100 measured pH or mV values together with temperature date and time Recording can be done either manually interval or event controlled Only three alkaline AA batteries are required for uninterrupted operation for approx 2 000 hours The Paraly software allows complete remote control of the Portamess 913 X pH via measured values and parameters can be read out and easily processed further e g using Microsoft Excel Measured values and meter record can also be sent directly to a printer via the serial interface Caution Never use the remote interface in hazardous areas The Model 913 X pH 12 2 Operation Meter design H ISSLOPE RCL l T zen STO o 00000000000 0 0 000 e e Electrode connection Reference electrode connection Temperature probe connection PC printer interface connection Sensor quiver Operation 13 Display Rinse Electrode Wait cal timer electrode response electrode response Stir buffer time 1 solution Press cal key PRESS 7 Senso Measurement face pesa pe 11 units m mV9 lt gt 9 H IN
36. he zero and slope are calculated using a mean straight line to DIN 19268 Therefore there is still only one zero point and one slope for Sensoface evaluation The calibration record has been supplemented by the third buffer Safety Precautions Be sure to read and follow these instructions If you have to open the Portamess 913 X pH to change the batteries make sure that it is outside the hazardous area If repairs are necessary the meter must be sent in to the factory Never operate the remote interface or printer within a hazardous area Whenever it is likely that the protection has been impaired the meter shall be made inoperative and secured against unintended operation The protection is likely to be impaired if for example the meter shows visible dama the meter fails to perform the i measurements after prolonged storage at temp res above 70 after severe transport stresses Before recommissioning the meti to EN 61 010 1 shall be performed factory fessional routine test according is test should be carried out at our Information 4 Safety Information Additional safety notes for ATEX The Portamess 91 X pH portable pH meter has been designed and manu factured under consideration of the valid European standards and regula tions and is suitable for use in areas with an explosion hazard Compliance with the harmonized European standards for use in hazardous areas is confir
37. ibration data are defective Completely reconfigure and recalibrate the meter Error in the factory settings or system memory FAIL appears in the display Possible causes EPROM or RAM defective Error in meter factory settings This error message should normally not occur as the data are protected from loss by multiple safety functions Should this error message nevertheless appear no remedy is available The meter must be repaired and recalibrated at the factory Troubleshooting 40 4 Maintenance Changing the batteries Note When the battery symbol appears in the display the batteries need replacement However you can still use the meter for a few days When the battery voltage continues to drop the meter will switch itself off Since battery con sumption is higher when the remote interface is used the battery symbol is displayed earlier in that case Never change the batteries within a hazardous area Use only the batteries specified on page 5 Make sure that the meter is carefully closed again and that the protective cover is properly mounted on the meter after changing the batteries see also Additional safety notes for ATEX page 5 To replace the batteries you need 3 alkaline AA cells and a screwdriver either straight blade or Philips Close the protective cover and remove the sensor quiver Lift the hook unscrew the four screws on the back of the meter and remove the lid
38. inter Printer type Matrix printer Interface Serial RS 232 interface Paper Normal paper width 57 5 mm 2 25 inches Data transfer Baud rate 4 800 bauds data bits 7 stop bits 1 parity even protocol no Power supply 230 V AC 10 96 Dimensions 197 x 73x 153 mm wxh x d Weight Approx 1 2 kg including plug in power pack Appendix 45 Physikalisch Technische Bundesanstalt Braunschweig und Berlin 1 2 3 4 5 6 7 8 9 10 11 12 Translation Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres Directive 94 9 EC EC type examination Certificate Number PTB 01 ATEX 2162 X Equipment Battery pH meter Portamess type 91 X pH Manufacturer Knick Elektronische Messger te GmbH amp Co Address Beuckestr 22 14163 Berlin Germany This equipment and any acceptable variation thereto are specified in the schedule to this certificate and the documents therein referred to The Physikalisch Technische Bundesanstalt notified body No 0102 in accordance with Article 9 of the Council Directive 94 9 EC of 23 March 1994 certifies that this equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of equipment and protective systems intended for use in potentially explosive atmospheres given
39. ke them impossible The temperature compensation takes the tempera ture dependency of the electrode slope into account Reference temperature for zero and slope of the meter is 25 C The pH of the medium to be measured is also temperature dependent This temperature dependence is unknown and depends on the composition of the mea sured medium As a result this temperature dependence cannot be compensated Therefore always indicate the measuring temperature together with the pH observe when comparing measured pH values In the case of a major temperature difference between the calibration and measuring temperature an additional temperature effect on the electrode zero may affect the electrode performance These effects are not subject to any general rules in contrast to the temperature depen dence of the slope To achieve a particularly high degree of measurement accuracy this error can be eliminated by calibrating at the measuring temperature recommended by DIN 19268 The temperature dependence of the calibration buffer pH values is automatically taken into consideration during calibration with Calimatic Information on Measurement 59 Glossary Auto switch off Buffer set Buffer solution cal Calibration Calibration buffer set Calimatic Combination electrode Data logger Data memory Electrode slope To protect the batteries the meter switches off automati cally when not operated for a l
40. keting und Vertrieb Managing Director Head of Marketing and Sales EC Declaration of Conformity 51 52 Connection for Measurement Hazardous Area Zone 0 Hd X 16 sseuiejiod E a I9 9 Dim 2 D euoz apapa 000 L1d Hd buipuoq jenuejodinb3 0 6 69 nz 53 Measurement in Hazardous Area Zone 0 E ujbue T 0 6 6902 4 gt jenueodinb3 5 General Information on Measurement Note The chapter General Information on Measurement ea provides a summary of the most important points to be observed during pH measurement You can skip this chapter if you are sufficiently familiar with the practice of measurement Notes on pH measurement General Two electrodes a glass electrode and a reference elec information trode are required for electrometric pH measurement They are usually offered combined in a glass or plastic body as a so called combination electrode During pH measurement simultaneous temperature detection is required For a correct pH value you must always specify the respective measurement temperature e g pH 7 15 Using a temperature detector together with the elec
41. lock mode Press the meas key to return to measuring mode Operation 31 Serial interface Note d Interface parameters Note d If the Portamess 913 X pH has been connected to a PC and measurement are taken in a grounded liquid measurement errors may result With the remote interface you can directly send data to a printer with serial port or set up a direct connection to a computer Via the computer the meter can be completely remote controlled and all data and parameters can be read Using the printer e g Model ZU 0244 you can directly print measured values stored data and records The RS 232 interface can be defined for all common baud rates Setting is carried out in the configuration menu Baud rate 600 Bd 1 200 Bd 2 400 Bd 4 800 Bd default setting 9 600 Bd Data format and protocol are permanently set to 7 data bits even parity one stop bit XON XOFF protocol For the command set of the Portamess 913 X pH refer to the online help of the Paraly transfer software Operation 32 Interface cable one interface cable is required to operate a printer or PC By simply turning the plug around on the Portamess 913 X pH the cable can be used to connect to either a printer or a PC due d 5 Connection assignment 1 O DCD RXD rer TXD Til RXD DTR GND GND TXD DSR RTS CTS 9 Standard settings for ZU 0244 Lab Printer M
42. med by the declaration of conformity and the EC type test certificate These are included in the user manual When using the Portamess 91 X pH portable pH meter the conditions of EN 60079 14 Electrical systems in hazardous areas must be observed Prerequisite to safe use of the equipment is the observance of the specified ambient conditions and temperature ranges Never open the meter inside a hazardous area Warning For applications in hazardous locations only use the battery types listed in the table below The batteries must be from the same manufacturer and of identical type and capacity Never use new and used batteries together Batteries for applications in hazardous locations Batteries 3 x each Temp class Ambient temperature range Duracell MN1500 4 10 Ta lt 40 91 T3 10 C lt Ta lt 50 Power One 4106 T3 10 lt Ta lt 50 Panasonic Pro Power LR6 T3 10 lt Ta lt 50 Additional safety notes for 5 Application hazardous locations of Zone 0 Warning When using the equipment in hazardous locations of Zone 0 there is a danger of releasing explosive atmo sphere and penetration by flames from outside into the hazardous area Zone 0 The following should therefore be observed The Model ZU 6979 X0 pH Pt1000 combination electrode connected to the pH temperature measuring loop of the Model 91 X portable pH meter m
43. ode not connected Break in electrode cable Wrong buffer temperature set for manual temperature specification During manual calibration the buffer solutions were not used in the specified order Calibration must be repeated Calibration was cancelled after approx 2 minutes because the electrode drift was too large This message is only displayed during calibration Calibration must be repeated with fresh buffer solutions Possible causes Electrode defective or dirty No electrolyte in the electrode Electrode cable insufficiently shielded or defective Strong electric fields influencing the measurement Major temperature fluctuation of the buffer solution No buffer solution or extremely diluted Troubleshooting 39 ERROR 14 ERROR 15 ERROR 18 ERROR 19 roo IL Note If the clock has not been set e g after battery replacement this error message is displayed To clear the message set the clock see page 31 If errors occur during transmission via the RS 232 interface this error message appears This message will not occur if Printer On is configured Possible causes No valid end character transmitted receiver overflow Wrong transmission rate baud rate set see page 21 Error during transmission Wrong data format see page 21 e g parity bit If the meter detects an error during the self test this error message appears Possible causes Configuration or cal
44. ollowing plugs can be connected Coaxial standard plug to DIN 19 262 and or 4 mm banana plug Connection Combination electrode Single measuring electrode Single reference electrode Integrated temperature detector of combination electrodes Separate temperature probe Remote Interface sssini Operation 16 Note Note Start up Note on off Note Note gj gj gj gj gj If no temperature detector has been connected the meter operates with the manually set temperature and man appears in the display If the Portamess 913 X pH is connected to a PC and is used to take measurements in grounded liquid measuring errors may result Prior to first measurement the buffer set to be used must be selected and the meter calibrated If required the clock must be set With the meter switched off one of the Sensoface status indicators is always visible Even with the meter switched off the calibration data and the contents of the data memory remain permanently stored Pressing on off switches the meter into measuring mode After power on the meter determines the con nected temperature detector and performs a self test Simultaneous appearance of all display segments symbols and Sensoface indicators Display of Model No 913 Display of software version Display of selected buffer set The temperature detector is only recognized during the power on procedure after pr
45. on of the plant as regards the pressure temperature of the materials used For the operating conditions when used without explosive mixtures reference shall be made to the specifications provided by the manufacturer Category 2 equipment The battery pH meter Portamess type 91 X pH the measuring cell and the separate or mounted Pt 1000 and NTC sensors are installed in potentially explosive atmospheres for category 2 equipment For the relationship between temperature class and the permissible ambient temperature range reference is made to the following table Temperature Permissible ambient temperature class range T6 10 40 T5 10 40 T4 10 55 sheet 2 3 EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the Physikalisch Technische Bundesanstalt In case of dispute the German text shall prevail Physikalisch Technische Bundesanstalt Bundesallee 100 D 38116 Braunschweig EC Type Examination Certificate 47 Physikalisch Technische Bundesanstalt PIB Braunschweig und Berlin SCHEDULE TO EC TYPE EXAMINATION CERTIFICATE PTB 01 ATEX 2162 X 16 17 18 Electrical data Auxiliary power 3 batteries Varta Universal Alkaline No 4006 type Mignon model LR6 AA AMG alkali manganese or batteries Varta Unive
46. oned product continues to meet the requirements of Directive 94 9 EC Le produit mentionn ci dessus est toujours en conformit avec les exigences de la directive 94 9 CE Die o g EG Baumusterpr fbescheinigung ist weiterhin g llig The above mentioned EC Type Examination Certificate remains valid L attestation d examen CE de type ci dessus reste valable Ausstellungsort datum Place and date of issue Lieu et date d mission Berlin 18 07 2012 Knick Elektronische Messger te GmbH amp Co KG J rgen Cammin Entwicklung Produktsicherheit Zulassungen Development Safety Approvals Statement of Conformity 49 AAA Dokument Nr Document No document Wir die We Nous Produktbezeichnung Product identification D signation du produit auf welche s sich diese Erkl rung bezieht mit allen wesentlichen Anforderungen der folgenden Richtlinien des Rates bereinstimmen in conformity with all essential requirements of the Council Directives relating to ration est sont conforme s aux exigences essentielles de la Directives du Conseil relatives to which this declaration relates is are auquel auxquels se r f re cette d clar EMV Richtlinie EMC directive Directive CEM Norm Standard Norme 1 est imp ralif de respecter les instructions de s cur Ausstellungsort datum Place and date of issue Lieu et date d mission AUI Knick gt EG Konformi
47. onger period Switch off can take place after either one hour or twelve hours When data logger or remote interface are active the auto switch off feature is disabled Contains selected buffer solutions which can be used for automatic calibration with the Knick Calimatic The buffer set must be selected prior to initial calibration Solution with an exactly defined pH for calibrating a pH measuring instrument Key for activating calibration Adjustment of the pH measuring unit to the current electrode characteristics The zero point and slope are adjusted Either a one or two point calibration can be carried out With one point calibration only the zero point is adjusted See buffer set Automatic buffer recognition Before the first calibration the buffer set used must be activated once The patented Calimatic then automatically recognizes the buffer solution used during calibration Combination of glass and reference electrode in one body The data logger records up to 100 measured values pH or mV together with the temperature date and time in the data memory Recording takes place either inter val or event controlled measured value difference or manually at the press of a key Up to 100 measured values pH or mV can be stored in the data memory together with temperature time and date Is indicated in of the theoretical slope 59 2 mV pH at 25 C The electrode slope is different for every electrode and
48. ons are required for three point calibration Zero point and slope are calculated using a mean straight line to DIN 19268 Calibration in which the electrode zero and slope are taken into consideration Two buffer solutions are required for two point calibration See electrode zero point Glossary 61 Index OOO 35 A Accessories 43 Approvals 45 Automatic calibration 22 Automatic calibration configuration 19 Automatic switch off configuration 21 B Batteries for hazardous area applications 5 Battery replacement 41 Baud rate setting 21 Buffer handling 57 Buffer selection 19 Buffer sets 19 Calibration error messages 38 Calibration general information 54 Calibration mode 22 Calibration timer configuration 19 Calimatic automatic calibration 22 Certificate of Conformity 46 Changing the batteries 41 Cleaning the electrode 58 Cleaning the meter 42 Clear memory 28 Clock mode 31 Combination electrode 57 Computer cable 33 Configuration 18 Connecting the sensors 16 Connections overview 13 Converting the slope values 26 D Data logger 29 Data logger configuration 30 Data memory 28 Data memory printout 33 Date format 21 Date setting 31 Declaration of Conformity 50 Diagnostics Sensoface 35 Display 14 Disposal 2 E EC Declaration of Conformity 50 EC Type Examination Certificate 46 Electrode care 58 Electrode connection 16 Electrode monitoring in brief 16 Electrode monitorin
49. ory location number is automatically incremented and the meter returns to measuring mode Read memory Pressing RCL displays the last measured values stored Now you can select any memory location using A and v Pressing RCL switches between the measured value and time date of storage This allows for example searching for a value that was stored at a certain time Pressing meas returns to measuring mode Clear memory To clear the entire data memory press STO to access memory mode and then clock to access data logger mode Select Clear Clr using A or v LL LOOGEr m By confirming this with STO the entire memory area is cleared If you do not want to clear the memory press meas to cancel Operation 28 Data logger Data logger The data logger records up to 100 measured values together with temperature time and date Data storage is performed either manually at the press of a key inter val or event controlled The data logger always saves the currently measured variable pH or mV Press STO to access memory mode and then clock to 39 lei access data logger mode Now choose between three different recording modes and the parameter setting of the data logger using A or v T Pressing STO confirms the selected mode In the Continue and Start mode this also starts the data logger The current memory location is shown in the display If Clear has been selected all memory locations are cleared
50. r setting step The differential value is always based on the currently set measured variable pH or mV This means that if dif ferential pH values are to be logged the meter must be set to pH measurement prior to parameter setting and data logging With manual data logging the measured values are saved by pressing STO After selecting the above parameters select Continue or Start using the A and v keys and then press STO to commence logging The data logger does not stop after reaching the last memory location 99 Recording is automatically contin ued with memory location number 00 To avoid losing data by overwriting download stored data and clear the logger before beginning a new set of data Be aware of this when using interval controlled data logging Operation 30 mode Dec Pressing clock activates the clock mode The time and date are displayed In this mode the battery consumption of the meter is reduced to a minimum Setting the clock STO clock To set the time or date the clock mode must be activat ed Press STO and clock simultaneously to set the clock The time display flashes P L DU The time can be set using A and v nr When the correct time is displayed press STO pn zc Then set the date dite ur When the correct date is displayed press STO AL H r Then set the year cnt Press STO to confirm the year The meter returns to c
51. ring C Note Note The automatic Sensoface electrode monitoring system provides information on the electrode state It evaluates zero point slope and response time of the electrode In addition Sensoface requests calibration at regular intervals Sensoface is specially designed for monitoring pH electrodes The deterioration of the electrode condition is signified by or O of the Sensoface indicator smiley This evaluation is permanent An improvement can only take place after a calibration This Sensoface indicator provides information on the amp electrode response time i e the amount of time electrode requires to supply a stable measured value The value is determined during calibration Due to wear aging and as the result of incorrect handling e g drying out the swelling layer of the glass membrane of an electrode may recede This leads to a longer response time and the electrode becomes sluggish electrode response is slow You should consider maintaining or replacing the electrode It may be possible to achieve an improvement by cleaning or for an electrode returned to duty after dry storage by rehydrating electrode response is very slow Correct measure ment is no longer ensured The electrode should be maintained If appropriate maintenance fails to rem edy the situation the electrode should be replaced Troubleshooting 35
52. rsal Alkaline No 8006 type Mignon model LR6 AA AMG alkali manganese or 3 batteries Varta Standard No 3706 type Mignon model AA zinc chloride pH temperature measuring circuits type of protection Intrinsic Safety EEx ia BU 2 3 4 Maximum values U 5 l 11 mA P 13 mW R 2487 o C 30 nF L negligibly low 1 8 uF 5100 Interface circuits RxD TxD Un 2253 V BU 5 6 7 The serial interface may only be used outside the hazardous area When the interface is connected to a circuit neither the equipment nor the pH temperature measuring circuit may be positioned inside the hazardous area Test report PTB Ex 01 20452 When used as category 1 2 equipment the battery pH meter Portamess type 91 X pH shall electrostatically contact resistance 1 be connected to the equipotential bonding conductor e g using the earth terminal The pH Pt 1000 combined measuring and reference electrode type ZU 6979 X0 may in tanks only briefly be used in zone 0 Reference has to be made to the risk resulting from the release of explosive atmosphere and of flames penetrating from outside Essential health and safety requirements Met by compliance with the above standards Braunschweig January 24 2002 sheet 3 3 EC type examination Certificates without signature and official stamp shall not bo valid The certificates may be circulated only without alteration Extracts or alterations are
53. t and slope of the electrode This type of calibration with two buffer solutions is a two point calibration For a one point calibration only one buffer solution is used and the calibration process is discontinued after the first calibration step Only zero point is adjusted The previous slope value is retained The Portamess 913 X pH also allows performing a three point calibration Here three buffer solutions are required Zero point and slope are calculated using a mean straight line to DIN 19268 The buffer solutions used for calibration must always correspond to the buffer set selected in the meter If you want to work with special buffer solutions not included in the stored buffer sets select manual calibra tion see page 19 Here you enter your individual buffer value at the correct temperature pH at calibration tem perature Values entered once remain stored During the next calibration the meter will suggest these values That means you do not have to enter the values once more provided that the sequence of the last calibration is retained Make sure that the buffer values are entered for the proper temperature Do not enter the nominal buffer value but instead the pH of the buffer solution at the calibration temperature Information on Measurement 55 Calibration The calibration interval is highly dependent on the condi intervals tions under which measurements are taken As a result no generally vali
54. tatserklarung Sheet Declaration of Conformity GmbH amp Co KG D claration de Conformit CE Beuckestr 22 D 14163 Berlin EG120718B Aufbewahrung Kooping Garde en d p t J rgen Cammin KB Knick Elektronische Messger te GmbH amp Co KG Beuckestr 22 D 14163 Berlin erkl ren in alleiniger Verantwortung dafs dieses Produkt diese Produkte declare under our sole responsibility that the product products d clarons sous notre seule responsabilit que le produit les produits Batterie pH Meter Portamess 911 pH 913 pH 2004 108 EG Die Sicherheitshinweise der mitgelieferten Produkidokumentation sind zu beachten Bei einer mit dem Hersteller nicht abgestimmten nderung des Ger tes und oder bei Nichtbeachtung der Sicherheilshinweise verliert diese Erkl rung ihre safety instructions contained in the documentation accompanying the product have to be observed If the apparatus is modified without having obtained manufacturer s prior consent and or the safety instructions are not followed this declaration becomes void G ltigkeit rit dans la documentation fournie avec le produit En cas de modification de l appareil sans l accord du fabricant et ou en cas de non respect des instructions de s curit cette d claration perd vigueur Berlin 18 07 2012 Knick Elektronische Messgerate GmbH amp Co KG a Dr Dirk Steinm ller Leiter Marketing und Vertrieb Head o
55. the second buffer Operation 22 HU Es Tn 3 LLE The response times of electrode and temperature detec tor are considerably reduced if you first move the elec trode in the buffer solution and then keep it still to read the values This provides stable values more quickly The electrode stability is checked and the measured mV value displayed Stability check can be overridden by pressing cal However this reduces calibration accuracy Calibration with the first buffer is complete Remove electrode and temperature detector from the first buffer solution and rinse off both thoroughly If you want to perform one point calibration press meas to terminate the calibration now The meter then shows the newly determined zero point in the main display and the old slope in the lower display and returns to pH measuring mode For two point calibration immerse the electrode and temperature detector in the second buffer solution Press cal to continue the calibration The calibration process runs again as for the first buffer Only with three point calibration turned on 3P CAL On see page 20 the calibration menu offers the possibility to evaluate a third buffer solution after two point calibra tion has been completed With three point calibration turned off 3P CAL OFF see page 20 the calibration procedure is automatically ended at this point With three point calibration
56. turned on 3P CAL On you can now evaluate a third buffer solution For two point calibration press meas to terminate the calibration The meter then shows the newly deter mined zero point in the main display and the new slope in the lower display and returns to pH measuring mode Operation 23 pH ei 100 Manual calibration eal noun LU d i If you want to perform a three point calibration immerse the electrode and temperature detector in the third buffer solution Press cal to continue the cali bration The calibration process runs again as for the previous buffers and is automatically terminated Zero and slope are calculated using a mean straight line DIN 19268 At the end of the calibration the zero point and slope based on 25 C of the electrode are displayed Then the meter switches back to measuring mode For calibration with manual buffer entry you must first disable the Calimatic Then you must enter the pH value of the buffer solution used for the correct temperature This allows to calibrate with any buffer solution Pressing cal activates calibration Calibration can be exited by pressing meas In that case zero and slope of the last calibration are displayed for a moment Enter the temperature corrected pH of your buffer solution using A and v Press cal to start calibration The buffer value set is stored so that you
57. unschweig und 13 14 15 SCHEDULE EC TYPE EXAMINATION CERTIFICATE PTB 01 ATEX 2162 X Description of equipment The battery pH meter Portamess type 91 X pH is primarily used for pH redox and temperature measurement in the electrochemical and environmental field Pt 1000 or NTC sensors which may be installed separately or be mounted in the measuring cell provide for general precise temperature measurements and automatic temperature compensation while pH values are measured Use as category 1 2 equipment is only permissible in conjunction with the pH Pt 1000 combined measuring and reference electrode type ZU 6979 X0 C ategory 1 2 ipment The battery pH meter Portamess type 91 X pH is used in potentially explosive atmospheres requiring category 2 equipment The pH Pt 1000 combined measuring and reference electrode type ZU 6979 0 is connected to the BU 2 socket of the unit and is installed in potentially explosive atmospheres requiring category 1 equipment For applications requiring category 1 2 apparatus the permissible ambient temperature as well as the media process pressure has to range from 20 to 60 and from 0 8 to 1 1 bar respectively Should these conditions not be met at the measuring sensor it has to be considered that the measuring sensor even in case of faults does not show any self heating effect It should also be noted that the plant owner is responsible for safe operati
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