pH and Redox Transmitter User Manual
Contents
1. 3 Take care to have adequate room for mounting and removal o f pHix Com pHix Compact is mounted correctly when the pact electrode tip is exposed approximately 10 mm out from the inner lining of the pipe 4 The working pressure of the system must not exceed 5 bar g 5 The working temperature of the s ystem must not exceed 80 C See also the following illustrations for correct adaptation to the pipe system Min 320 mm free space for mounting re moval of pHix Compact 2 outer pipe thread ISO Viton gasket v 228 1 Min 25 mm 80 mm to thread inner lining Max working pressure 5 bar g Maks working temperature 80 C GB pHix Compact Manual 100318 12 p FI zx compoct Mounting mjk Electrical mounting General pHix Compact must not be installed in explosion hazardous locations pHix Compact should be connected to an active 4 20 mA input or be supplied from a separate 12 30 VDC vo tage source Max power consumption is 50 mW pHix Compact s 4 20 mA output s is gal vanically separated from Signal cable pHix Compact comes wi he liquid ith either 1 or 2 galvanically separated signal outputs Qo pHix Compact with 1 x 4 20 mA output for ph or redox mea surement Note PHix Compact is delivered with cables made of PVC or PUR Check the type of cable according2. Redox electrodes Redox electrodes require cleaning like pH electrodes but not buffer adjusting However MJK do deliver redox buffers for control of electrode and transmitter If the transmitter does not show the correct value when put into the buffer solution the electrode must be exchanged Cleaning of elektrodes Use clean potable water for cleaning the electrode A 1096 hydrochloric acid solution can be used for cleaning if the electrodes are gre asy Protein coatings is removed with Pepsin cleaning fluid item number 163020 Electrode lifetime The expected lifetime of the electrodes is dependant of the measurement The lifetime is given with reservation as the physical conditions as well as the tempera ture pressure and pollution of the fluid has great influence on the stated lifetime The lifetime is based on 25 C but if the temperature is doubled the lifetime will be halved PH electrodes in purifying plants for ordinary household wastewater lasts approximately 1 year whereas the lifetime of pH electrodes in industrial plants is dependent on measu ring application and the process Redox electrodes have a lifetime of approxi mately 2 years depending on cleaning 21 SW 836502 PHz compact Spares and Specifications mk Spares Specifications Item no Description pHix Compact 160310 pHix pH electrode O point 4 6 pH Supply voltage 12 30 V DC 16
3. item no 521409 Fitting for submersion item no 155205 Extension for universal bracket item no 200215 Universal bracket 1 4 thread item no 200205 ISO 228 1 GB pHix Compact Manual 100318 24 p FEL compact Appendices mk Accessories for electrical mounting Loop supplied digital indicator type 531 item no 200125 See also data sheet 6 3 533p mk pH 230 V AC digital indicator type 533 with built in 24 V DC power supply and 2 relay outputs for alarm control etc item no 200130 See also data sheet 6 3 Power supply type 515 item no 200100 See also data sheet no 6 3 25 SW HW 837999 837999 e p FI zx compact pH and Redox Transmitter mjk Liability MJK Automation A S is liable to the common rules of i Danish law on product liability However the liability is MK Aa mede AVS reduced to coverage of our public liability insurance of DK 45 45 56 06 56 products To the extent where nothing else follows in lines NO 47 69 20 60 70 of invariable rules of law we are not liable for loss of profits SE 46 53 31 77 50 and working deficits or other indirect losses NL 31 251 672171 Changes IRL 353 879535625 USA 1 847 482 8655 As our products are developed continuously we reserve AUS 61 3 9758 8533 the right to make any alterations without prior notice GB pHix Compact Manual 100318
4. be used Extending the signal cable There are no specific demands to the cable that may be used for extending the existing cable except that it should be shielded and that the voltage drop should not be too big pHix Compact is a passive transmittter Considerations should be taken regar ding the voltage drop over the signal cable The supply voltage on the site must not drop below 12 V DC at maximum current 20 mA In order not to compromise operational re liability the cables should be interconnected by means of a watertight connection box item no 200590 2e000 00000 7 ipse MJK connection box item no 200590 GB pHix Compact Manual 100318 e p FI zx compoct Mounting mk Connection examples Local display MJK Power MJK Digital Supply 515 Indicator 531 Cable from pHix Compact Panel display MJK Digital Indicator 533 Cable from pHix Compact l N 4 20 mA signal with 24 V DC supply from 533 R1 R2 2 x voltage free relay outputs Connection to PLC PLS MJK Power Supply 515 oooo0oo000 S AT A20 PLC PLS with e passive input Age Cable from se pHix Compact S GS ate A20 PLC PLS with ee active input Aes Cable from ot 12 30 VDC pHix Compact O c 15 SW 836502 p FI zx compact Buffer Adjustment Buffer adjustment General In order to ensure a precise and stable pH
5. gutters wells and reservoirs Closed systems is e g pipe Systems or tanks vessels pHix Compact has class IP 68 enclosure and therefore withstands submersion into open system to a max pressure of 1 bar 10 mWG pHix Compact con forms to pressure class PN 5 and can therefore be mounted in closed systems with a working pres sure of max 5 bar Mounting in open channels and reservoirs Due to the lifetime of the electrode and measurement accuracy the following should possibly be complied with when mounting pHix Compact 1 pHix Compact should be mounted on a location with a good liquid circulation 2 The electrode tip should be minimum 30 cm below the liquid surface 3 The electrode tip must not touch the bottom Suspended in the cable If the liquid is flowing relatively slow and therefore giving no risk of pHix Compact hitting the side of the channel reservoir pHix Compact may be suspended in the cable by means of a cable bracket J pHix Compact is submerged directly into the liquid and is suspended in the cable by means of a cable bracket item no 560916 GB pHix Compact Manual 100318 p FI zx compoct Mounting mjk Mounted on a pipe end When measuring in e g open tanks inlet wells or gutters where strong currents can occur pHix Compact should be firmly fixed Fixed mounting can be made by means of a
6. 0311 pHix pH electrode O point 7 0 pH Consumption App 50mW 160312 pHix redox electrode Temperature range 20 60 C 570054 O ring for electrode Housing material Ryton PPS and 571030 Black rubber gasket for electrode stainless steel 521409 Union ring w Viton gasket EN 1 4404 ASTM 316L for mounting of pHix on pipe end Enclosure IP 68 withstands 521441 Viton gasket for union ring submersion to 10 mWG Input 0 14 pH 1000 1000 mV The followin is recommended for cleaning and buffer adjustment Input impedance Measuring input gt 10 ohm Reference input 109 ohm Output 0 14 pH 4 20 mA Temperature comp 20 80 C Item no Description Temp electrode Built in behind steel section 163020 Pepsin solution 0 251 Buffer adjustment Automatic with tilt switch 163030 pH buffer 6 x 25ml ampoules Switch ring or HART 2 pcs pH 4 pH 7 and pH 10 command 163032 pH buffer 1 liter pH 4 Cable length 6 meter 163034 pH buffer 1 liter pH 7 CE approvals EN50081 1 EN50082 1 163036 pH buffer 1 liter pH 10 163040 Redox buffer 6x25ml 230 mV Pt Ag AgCl Dimensions 267 38 amp 49 66 red separately ES 114 RG ISO 228 1 NB Union ring must be orde GB pHix Compact Manual 100318 e p Hxc compact Appendices mjk Appendices Error codes Symptom mA signal Fau
7. Ip FI zx compact Buffer Adjustment Example of buffer adjustment in pH 4 and 7 1 With the switch ring in position M flush the electrode tip in demineralised water The LED gives 1 short flash every 5 Sec 2 Turn the switch ring from position M to position 7 and dip the electrode tip into the pH 7 buffer solution The LED will now begin to give 3 short flashes every 5 sec When the buffer adjustment has finished sucessfully the LED will start to give 2 short flashes every 5 sec The zero point is now set 3 Turn the switch ring from position 7 to position 4 and dip the electrode tip into the pH 4 buffer solution The LED will now begin to give 3 short flashes every 5 sec When the buffer adjustment has finished sucessfully the LED will start to give 2 short flashes every 5 sec The span angle is now set Buffer adjustment in pH 7 buffer In service measure Buffer adjustment in ment pH 4 buffer 1 flash every 5 second Buffer adjustment in pH 10 buffer GB pHix Compact Manual 100318 18 p FI zx compact Buffer Adjustment mjk Buffer adjustment using the tilt switch Remember to clean the electrode as descri bed in the previous section Only the built in tilt witch is active when the switch ring has been removed for more than 10 minutes The tilt switch inside pHix Compact detects when the electrode tip is turned upwards When the electro
8. adjust pHix Compact with the switch ring The switch ring has 4 positions and must only be set to one of these positions in order to obtain correct function Pos Function M Measurement The switch ring should always be in this positioni during normal service measuring This is indicated by the LED that is flashing for approx every 5 seconds 4 Buffer adjustment in buffer with pH value pH 4 7 Buffer adjustment in buffer with pH value pH 7 10 Buffer adjustment in buffer with pH value pH 10 If the switch ring is set to one of the positi ons 4 7 or 10 the LED will give out 3 short flashes every 5 seconds If oHix Compact is being put into a buffer liquid with the same value as the switch ring is set to pHix Compact will automa tically begin to scan for a buffer with the same value When the value is found pHix Compact will automatically set the O point or span to the correct value and the LED will indicate this with 2 short flashes every 5 seconds pHix Compact is now ready either for mea surement or for another buffer adjustment at another pH value pHix Compact determines automatically if zero point or span need to be adjusted depending of the electrode s zero point and the preceeding buffer values If oHix Compact cannot find the pH value for the selected buffer solution it will go into alarm condition which is indicated with continuous LED flashes every second SW 836502
9. de tip has been turned upwards in more than 30 seconds pHix Compact will go into buffer adjustment mode Proceed as described Remove pHix Compact from the process rinse the electrode and turn the electrode upside down The buffer adjustment mode is initiated after approx 30 seconds this is indicated by the LED with 3 short flashes every 5 seconds If pHix Compact is dipped into a buffer solution with a value of 4 7 or 10 pH pHix Compact automatically search for a buffer with one of those values When the correct value is found the zero point or span will automatically be set to the right value The LED will give 1 short flash every 5 seconds for indication of a succesful calibration pHix9 Compact is now ready to be put into Service or for another buffer adjustment with another pH value If a new buffer adjustment to another or same pH value pHix Compact is simply turned upside down again with the elec trode tip pointing upwards in approximately 30 seconds until the LED gives 3 short flashes every 5 seconds whereafter above procedure is repeated If oHix Compact cannot find the correct value for the selected buffer liquid the trans mittter will go into fault condition indicated by a flash every second The pHix Compact software determines automatically whether it is the zero point or the span that need adjustment depending on the zero point value of the electrode and the preceeding buffe
10. e p FI zx compact pH and Redox Transmitter mk pHisx compact pH and Redox Transmitter User Manual GB pHix Compact Manual 100318 SW 836502 Ip FI zx compact pH and Redox Transmitter mjk Konformitetserklaering Vi MJK Automation A S DK 2850 Naerum p tager os det fulde ansvar for at produktet Declaration of Conformity We MJK Automation A S DK 2850 N rum declare under our sole responsibility that the product Konformitatserklarung Wir MJK Automation A S DK 2850 Neerum erklaren in alleiniger Verantwortung dass das Produkt MJK pHix pH redox temperature transmitter som denne erkl ring ang r er i overensstemmelse med f lgende standard er eller andre normdokument er EN 50081 1 1995 EN 50082 1 1995 EN 60730 efter bestemmelserne i direktiv 89 336 EOF 73 23 E F 93 68 EOF Declaration de conformite Nous MJK Automation A S DK 2850 Neerum d clarons sous notre seule responsabilit que le produit to which this declaration relates is in conformity with the following standard s or other normative document s EN 50081 1 1995 EN 50082 1 1995 EN 60730 following the provisions of Directive 89 336 EWG 73 23 EWG 93 68 EWG Dichiarazione di conformita Noi MJK Automation A S DK 2850 Neerum dichiariamo sotto la nostra esclusiva responsabilit che l apparecchio auf das sich diese Erklarung bezieht mit der den folgenden Nor me en oder normativen Do
11. ing service and maintenance work etc Repair 1 Repair must only made by MJK or by a Service representative approved by MJK Explosion hazardous areas pHix Compact must not be installed in explosion hazardous areas SW 836502 PHI compact Introduction miki Construction pHix Compact is a 4 20 mA 2 wire trans mitter with power supply and measuring signal transmitted over the same two wires pHix Compact also has HART communi cation capabilities via the mA wires where both the primary measuring signal pH or re dox and the secondary measurement signal can be read HART communication gives the possibility to configure nearly all para meters like measuring ranges alarm limits electrode parameters and also commands for buffer adjustment HART communication requires that pHix Compact is connected to a HART commu nicator or a PLC with HART interface pHix Compact is delivered as standard for pH or redox masurement but can also be delivered for other types of measurement and non standard settings Product identification Check that the item s delivered corre sponds to the ordered item s The item number is printed on a label that is sticked onto the packing Shown below is the label for a delivery including a pHix Compact transmitter with pH electrode with zero point at pH 4 6 r 203110 mk pHix Compact pH temp transmitter Complete with electrode 160310 WARE S
12. kument en bereinstimmt EN 50081 1 1995 EN 50082 1 1995 EN 60730 Gem ss den Bestimmungen der Richtlinie 89 336 EWG 73 23 EWG 93 68 EWG Declaraci n de Conformidad Nosotros MJK Automation A S DK 2850 Naerum declaramos bajo nuestra nica responsabilidad que el producto MJK pHix pH redox temperature transmitter auquel se r f re cette d claration est conforme la aux norme s ou autre s document s normatif s EN 50081 1 1995 EN 50082 1 1995 EN 60730 conform ment aux dispositions de Directive 89 336 EWG 73 23 EWG 93 68 EWG r M al quale questa dichiarazione si riferisce amp conforme alla seguente normativa e standard o ad altri documenti di normativa e EN 50081 1 1995 EN 50082 1 1995 EN 60730 conformemente alla disposizioni della Direzione 89 336 EWG 73 23 EWG 93 68 EWG 28 09 2004 Jens Kruse i Ig CA LLA A al cual se refiere esta declaraci n est en conformidad con la s siguente e norma s u otros documentos normativos EN 50081 1 1995 EN 50082 1 1995 EN 60730 segun las disposiciones de la s directiva s 89 336 EWG 73 23 EWG 93 68 EWG e Ip FI zx compact pH and Redox Transmitter mjk Contents Introduction 5 Maintenance Safety instructions 5 General lale ore U ge 5 MENAS seni rto ts Explosion hazardous areas 5 Redox e
13. lectrodes Construction seerne 6 Cleaning of elektrodes 21 Product identification 6 Electrode lifetime 21 Spal 68 these bed 22 Mounting ecrire 7 P i Electrode types 7 DIMENSIONS aesir 22 Mounting the electrode 8 Specifications 22 Gasket O ring and plug 8 Dimensions Mechanical mounting 10 General sss 10 Appendices 23 Open and closed systems 1 Mounting in open channels and Error codes nsss 23 reservoirs 10 Standard transmitter Mounting in closed systems 11 configuration veces 23 Mounting on a pipe stub 12 i HART commands 23 Electrical mounting 13 Generali c necat Avnet axe 13 Accessories for mechanical Signal cable 13 mounting 24 Cutting the signal cable i A oec lectrical Cutting the signal cable 14 GOESSOTIES or e ecirica Extending the signal cable 14 MOUNN Pasce 25 Connection examples 15 Local display Panel display Ls Connection to PLC PLS 15 Buffer adjustment 16 General ees 16 Buffer liguld uc cene 16 Cleaning o edens 17 Buffer adjustment using the Switch ring sessees 17 Example of buffer adjustment in pH 4 and i ee 18 Buffer adjustment using the ti
14. lt Remedy Constant current signal Electrical connection Check connection and make the necessary or l 0 mA is not made correctly corrections Unsteady current signal Undervoltage Check the voltage at transmitter Min voltage max load gt 12 V DC 3 80 MA Undervoltage Check the voltage at transmitter Min voltage max load gt 12 V DC 3 85 mA Electrode error Exchange the electrode 3 90 MA Calibration not possible Exchange the electrode 3 95 mA pH lower than Readjust the measuring range to a lower range measuring range 4 00 mA Error on startup Disconnect the transmitter from PSU for min 5 seconds and try again 22 00 mA pH higher than Readjust the measuring range to a higher range measuring range Standard transmitter configuration The transmitter is standard configured as described below on delivery pH transmitter item no 203111 Measuring range 0 14 pH 4 20 mA 0 point 4 6 pH pH and temperature transmitter item no 203112 Measuring range 0 14 pH 4 20 mA O punkt 4 6 pH Temperature 0 50 C 4 20 mA Redox transmitter item no 203121 Measuring range 1000 to 1000 mV 4 20 mA HART commands All commands and settings can be read and set by means of HART commands Ask for separate documentation regarding HART commands 23 SW 836502 e p Hxc compact Appendices mjk Accessories for mechanical mounting Union for mounting on pipe end
15. lt engem 19 3 SW 836502 e I FI zx compact pH and Redox Transmitter mjk GB pHix Compact Manual 100318 4 p FI z compoct Introduction mk Introduction Thank you for choosing a pHix Compact pH Redox transmitter We have done everything possible to make a pH Redox transmitter that can fulfill all your demands pHix Compact is very simple to install and connect as electrode fitting and transmitter is built together in the same NEMA 6X class enclosure By doing so all error sources like e g bad cable connections and leaking fittings are eliminated As pHix Compact is equipped with an uni on flange in one end and male thread in the other the transmitter is very easily mounted in open tanks as well as pipes without the usual use of fittings You can always contact your representative or the MJK Service Hotline for advice and guidance Also take a look at http www phix dk PHix is registered trademark of MJK Safety instructions 1 Read this manual carefully 2 Be aware of the environment on the in stallation site Wear necessary protective equipment and follow all current safety regulations 3 pHix Compact can provide a start signal for dangerous machinery Always ensure that connected machinery and other equipment are effectively being put out of service i e removal of main fuses lock main and or security switches in off position before commencing setting fault find
16. measurement pHix Compact must be buf fer adjusted with regular intervals Buffer adjustment is a calibration which is carried out in practice by dipping pHix Compact in solutions buffers with known pH values The calibration is made by using these known pH values as a reference point pHix Compact is buffer adjusted using 2 buffers with pH values of 4 and 7 acidic range or pH values of 7 and 10 alkalic range For measurements around pH 7 neutral both buffers can be used The sequence of different pH buffer soluti ons is not important pHix Compact auto matically detects which buffer is used for ajusting the point of origin and which buffer is used for ajusting the slope sensitivity The first reference point sets the correct zero point for the measurement curve and the second reference point sets the correct Slope for the measurement curve pHix Compact is as standard delivered to use buffer values at the values 4 7 and 10 but other values can be chosen via HART communication pH 14 pH 10 pH7 pH4 0 First buffer adjustment with pH 7 as reference pH 14 pH 10 pH7 pH 4 pH 0 0 Second buffer adjustment with pH 4 as reference Buffer liquid Buffer liquid is delivered as ready to use solutions with the pH values 4 7 and 10 During the buffer adjustment pHix Compact is calibrated in accordance with the pH values of the buffer solutions It is therefore importa
17. ng and plug It is very important that both gasket and O ring and packing surfaces is clean and smooth and without cracks and scratches to avoid penetration of liquid in the center plug connection Check that gasket and O ring are complete and clean ant that they are placed correctly Likewise the connectors in both transmitter and electrode should be absolutely clean and dry Eventually use a dry cloth Check that the connectors are absolutely clean and dry GB pHix Compact Manual 100318 e p FI zx compoct Mounting mjk 1 Smear the O ring in acid free grease or Vaseline 2 Check that the O ring is placed correctly in the recess of the new electrode 3 Check that the hole for the electrode in the pHix Compact is completely dry if necessary use a dry cloth 4 Screw in the new electrode and tighten by hand Do not use tools 5 Finally pHixX Compact must be buffer adjusted prior to commissioning See pg 16 9 SW 836502 p FI zx compact Mounting mjk Mechanical mounting General pHix Compact is made from Ryton PPS and stainless steel EN 1 4404 ASTM 316L and has because of this a tremende ous resistance against chemicals pHix Compact can be used without any further preparation for measuring in solvents and strong basic or acid liquids Open and closed systems pHix Compact is designed for measuring in both open and closed systems Open systems is e g
18. no 100 160310 pH elektrode 0 4 6pH 0 14 pH 0 80 c U JS1503 J D Item number Serial no Item description Electrode specifi cation An identical marking is found on the pH transmitter cable Ur GB pHix Compact Manual 100318 e p FI zx compoct Mounting mks Mounting Electrode types The electrode housing is marked with information about electrode type and measuring range for the actual electrode pH electrode mjk 0 4 6 pH 160310 pH electrode item no 160310 1 14 pH 10 80 C 0 4 6 pH pH electrode mika 55 160311 PH electrode item no 160311 1 14 pH 10 80 C 0 7 0 pH Redox ORP mjk electrode 160312 Redox electrode item no 160312 O 80 C 7 SW 836502 p FI zx compact Mounting mjk Mounting the electrode Upon delivery of pHix Compact the elec trode is not mounted pHix Compact is configured for the electrode type included in the delivery and therefore it must only be used together with the electrode with which is was delivered pHix Compact shoud be used only with the electrode type included the delivery Contact MJK if other electrode types should be used Replacement of the electrode to another of same type does not require reconfiguration The electrode must not become dry Therefore do not remove the protective cap before before commissioning of pHix Compact Gasket O ri
19. nt to use as accurate buf fer solutions as possible i e a pH 7 buffer solution really has a pH value of exactly 7 MJK delivers buffer solutions for both pH og redox calibration The pH value of the buffer liquid is depen dant of the temperature and the stated pH value is valid at 25 C Buffer liquid has limited lifetime Bufferliquid for pH 4 and 7 has a life time of approx 1 year and buffer liquid for pH 10 is so mewhat shorter Note that buffer liquid with pH 10 is very unstable and should therefore be disposed of no more than 1 hour after it has been poured from the bottle GB pHix Compact Manual 100318 p FI zx compact Buffer Adjustment mjk Cleaning Before initiation of a buffer adjustment the electrode should be rinsed in running water and additionally in demineralized water be fore the electrode is lowered into the buffer liquid and again between every step in the buffer adjustment process Use only fresh buffer solutions Dispose of any used buffer liquid Take care that transmitter electrode and buffer solution has the same temperature preferably approx 25 C Put eventually pHix Compact in a bucket of lukewarm water before commencing a buffer adjustment Buffer adjustment using the switch ring Remember to clean the electrode as descri bed in the previous section When the switch ring has been put on for at least 10 minutes it will only be possible to buffer
20. pipe with 5 4 inner thread ISO 228 1 and screw pHix Compact directly into the pipe pHix Compact mounted directly on a immersion bracket item no 155205 which is fastened with universal bracket item no 200205 and wall bracket item no 200215 Mounting in closed systems The electrode is filled with a liquid which should cover the membrane internally at all times Therefore pHix Compact should not be mounted in angles exceeding 75 from vertical Because of the liquid inside the electrode pHix Compact should always be mounted in angles less than 75 from vertical pHix Compact can be screwed into a pipe stub with 2 outer thread by means of an union item no 521409 that is placed over the housing flange after removal of the Switch ring Pull off the Put on the Put on the switch ring union switch ring if needed The switch ring is only used for buffer ad justment calibration but it is also possible to perform a buffer adjustment without using the switch ring See also pg 16 Buffer adjustment SW 836502 p FI zx compact Mounting Mounting on a pipe stub In order to ensure a tight seal and correct function of pHix Compact the following should be complied with 1 The pipe stub must be flush and free of Scales burrs etc 2 The pipe stub must have a length so that the tip of the electrode is exposed approximately 10 mm into the liquid
21. r values SW 836502 e p FI zx compact Buffer Adjustment m I ki GB pHix Compact Manual 100318 20 p HIP compact Maintenance mjk Maintenance General A pH or redox measuring system require maintenance with regular intervals Cleaning and buffer adjustment calibration is a normal and necessary maintenance that should be carried out regularly Intervals The interval between buffer adjustments and cleaning is depending widely on the working conditions Therefore the easiest way to find the most appropriate cleaning interval is by feeling one s way For instance start out with cleaning and buffer adjustment every week If the measurement is unchanged or just slightly changed after the buffer adjustment the electrode were not dirty or just slightly dirty and the cleaning interval can be chan ged to 2 weeks and after that 1 month The intervals are equally reduced if the elec trodes are very dirty and the measurement is significally changed after buffer adjusting There are no general guidelines to clea ning and adjustment men in most cases a monthly adjustment is sufficient Before beginning a buffer adjustment the electrode must be thoroughly washed first in running water if necessary a degreasing fluid like for example 10 hydrochloric acid solution and there after in de ionised water before the electrode is put into the buffer solution and in between every step of the buffer adjustment
22. to the specifications before con necting pHix Compact PVC Cable PVC Cable PUR Cable gt 2005 2006 gt 07 2007 gt Nr Designation Color Color Color Signal 1 Shield 2 12 30 VDC Red Red 1 Black pH or redox signal 3 4 20 mA Black Black 2 Black Output 1 Q 9 9 pHix Compact with 2 x 4 20 mA outputs 1 for ph or redox measurement and 1 for temperature measurement PVC Cable PVC Cable PUR Cable 2005 2006 gt 07 2007 gt Nr Designation Color Color Color Signal 1 Shield 2 12 30 V DC Red Red 1 Black pH or redox signal 3 4 20 mA Black Black 2 Black Output 1 4 12 30 V DC Yellow Orange Grey Temperature signal 5 4 20 mA Orange Brown Brown Output 2 13 SW 836502 p FI zx compact Mounting mjk Cutting the signal cable The cable comes with stripped wire ends ready for mounting 2 Black Grey Brown 1 Bla 1 Black i Shield ick Shield 2 Black j Uncutted cable end for pHix Compact with 1 respectively 2 signal outputs Besides the signal wires the cable also con tains wires solely used for service purposes and software upgrades These cables are exposed when the cable is cut The cable for a pHix Compact with dual outputs is cut and the service wires are exposed Grey 1 Black Brown 2 Black Shield Service wires The service wires must not be used Only the signal wires 1 black 2 black grey brown and shield may
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