Manual hydrion-10
Contents
1. 13 2 3 2 Selecting a Calibration Set Open the drop down menu under Calibrate and click on Selecting a calibration set Another drop down menu will appear with three predefined calibration sets pH 9_7_4 pH 7_4 and Standard Beneath these will be listed any additional user defined calibration sets These user defined sets can be deleted Select the desired calibration set and activate it by clicking inside the table This will cause all the drop down menus to disappear The selected calibration set is now activated and its name will appear in the Project window 2 3 3 One Point Calibration Once the desired calibration set is selected click again on Calibrate in the menu bar choose one point calibration from the drop down menu and click on Start The one point calibration can also be started by clicking on one point calibration in the project window Place the Sensor unit in the correct calibration fluid and click on OK to start the calibration If by any chance the wrong calibration fluid is used the program will automatically notice after one minute and will interrupt the procedure with the comment Wrong Calibration fluid The one point calibration has to be repeated every two hours Therefore if you start a new measurement session on a new day you must always begin with a one point calibration pH Calibration A pH one point calibration has to be carried out once every week Whenever there is a need for2. If the Sensor unit has been stored in the storage vessel for more than 12 hours rinse the Sensor unit with calibration fluid 2 and put it in calibration fluid 2 for conditioning for at least 15 minutes For rinsing and conditioning it is sufficient to use old calibration fluid For obtaining best results all samples solutions and the Hydrion 10 must have the same temperature During calibration and measurement temperature must not change more than 0 05 C min otherwise the measurement procedure will take longer When measuring a new sample the Sensor Unit should be rinsed with sample fluid If no sample fluid is available then rinse the Sensor Unit with old calibration fluid 1 Shake off the remaining fluid and place the Sensor Unit in fresh sample fluid Try to keep the sample concentrations within the calibration range for the most accurate results When a set of samples has to be measured try to measure from low to high concentrations After a pH multi point calibration put the Sensor unit in calibration fluid 2 for at least one hour When measuring from high to low concentrations put the Sensor unit in the sample for at least 5 minutes before starting the measuring procedure The Sensor unit fits into a standard 500 ml laboratory beaker During measurement the Sensor unit should be placed preferably 6 to 7 cm into the sample fluid Keep the small holes in the Sensor unit cap just above the surface of the sample fluid A sample o
3. Manual Hydrion 10 lon Concentration Meter Hydrion BV Nudepark 130 6702 DX Wageningen the Netherlands P O Box 522 6700 AM Wageningen the Netherlands Tel 31 317 415551 Fax 31 317 415384 E mail info hydrion nl Website www hydrion nl Important Information For proper use of the Hydrion 10 lon Concentration Meter it is important to read the information in the manual first or at least the following chapters 2 4 6 Recommendations for Accurate Measurements 3 3 Sensor Unit Maintenance If you encounter problems which cannot be solved with this manual please contact Hydrion BV Nudepark 130 6702 DX Wageningen the Netherlands P O Box 522 6700 AM Wageningen the Netherlands Tel 31 317 415551 Fax 31 317 415384 E mail info hydrion nl Website www hydrion nl Hydrion 10 Table of Contents Measuring Equipment The Sensor unit The Hydrion 10 Program ae a a NEN 2 The Hydrion 10 Program 2 1 General 2 1 1 Starting the Hydrion 10 Program 2 1 2 Menu of the Hydrion 10 Program 2 1 3 Toolbar 2 1 4 Project Window 2 2 Project 2 2 1 The Importance of Using Different Projects 2 2 2 Creating a Project 2 2 3 Opening an Existing Project 2 3 Calibrate 2 3 1 Creating a Calibration Set 2 3 2 Selecting a Calibration Set 2 3 3 One Point Calibration 2 3 4 Multi Point Calibration 2 3 5 Standard Calibration Fluid 2 4 Measure 2 4 1 Measuring a New Sample 2 4 2 Measuring Panel 2 4 3 Box colors 2 4 4 Symbols in
4. 3 Speci fications 3 1 Measuring Range Sensor type minimum maximum lifespan mo se oe gt o o 4 microSiom 10000 microSiom Temperature EC PH Ke Reference ce 2 440 Ml 0 003 PPM 27PPM 4 4710 407M 2 7 PPM 2 700 PPM a0 M a e OP A A SSS aa E O S a Temperature of sample fluid should not exceed given values Low temperatures make ISE sensors slow high temperatures speeds up aging of ISE sensors as does high ionic strength Reference electrode needs refill after 3 months Total ionic strength must not exceed 0 5 M Maximum inaccuracy is 10 of the measuring value over the entire calibration range 3 2 Parts of the Measuring System 1 Sensor unit watertight stainless steel tube with lon Selective Electrodes and other sensors and electronics Height 28 cm diameter 8 2 cm fits in a standard 500 ml beaker glass weight 2 5 kg 2 Storage vessel for dry or humid storage stainless steel container weight 0 35 kg 3 PC Supplied by the user Use of user s current PC is possible Weight of laptop 3 kg 4 Power adapter 19 Volt AC DC for PC weight 0 30 kg 5 Serial cable and USB adapter weight 0 20 kg 6 Suitcase Air and watertight polypropylene Dimensions 52x43x22 cm weight 5 5 kg 7 Hydrion 10 program on CD ROM and User Manual in English weight 0 30 kg Total weight of the Hydrion 10 equipment in suitcase with laptop and power adapter 12 k
5. a one point calibration the Hydrion 10 Program will warn you by graying out the little windows for pH and HCO3 measurement results After a one point pH calibration the Sensor Unit should be rinsed and placed in old standard fluid 2 for at least 15 minutes Calibration Interval The two hour interval for the one point calibration for all sensors except the pH and the one week interval for the one point calibration for the pH have been set as defaults in the program If necessary these settings can be changed by a service engineer but not by the user Since we now use a much better reference electrode recalibration every two hours may not be required anymore Control Measurements It is advisable to perform a control measurement on a standard solution with a known composition For the standard calibration set we recommend using Evian bottled water or a comparable mineral water with a stable composition This control measurement should be performed after every one point calibration and once every hour during measurement sessions When results differ more than 10 from the actual values you must repeat the one point calibration 14 2 0 4 Multi Point Calibration After selecting the desired calibration set click on Calibrate in the menu bar and choose multi point calibration from the drop down menu Click on Start to start the calibration procedure The program will them prompt you to insert measuring tube in fluid 1
6. for use 2 1 2 The Menu Bar of the Hydrion 10 Program The menu bar consists of two parts as shown in the figure below The left hand side is meant for operating the program this is handling the actual menu The right hand side shows the battery status not important in this version Clicking on Project will open the following drop down menu Project Create a new project New Open an existing project Open View the results View Close the active project Close Close the Hydrion 10 program Exit Opening recent project All of these options can be activated with a single click on the left mouse button Clicking on Calibrate will open the following drop down menu Calibrate Create a new calibration set New Select a calibration set Calibration set Start a one point calibration One point calibration Start a multi point calibration Multi point calibration Service is only accessible by a certified Hydrion service engineer Help is used to solve problems Hydrion 10 la x Project Calibrate Opties Service View Help diliiiceici a Toolbar Main menu bar Ready for measurement 2 1 3 Toolbar The toolbar makes it possible to easily carry out various procedures These procedures are also available in the main menu bar Start multi point calibration Close project Start one point calibration Open project iew saved data Close program 2 1 4 Project Window When Open project i
7. the Result Bar 2 4 5 Selecting Units 2 4 6 Recommendations for Accurate Measurements 2 5 Results 2 5 2 Viewing Stored Data Results 25 3 Processing Data Results 2 5 4 Printing Stored Data Results 3 Specifications 3 1 Measuring range 3 2 Parts of the Measuring System 3 3 Sensor unit Maintenance Appendix New Data Logger Application Application for the Replacement of Sensor Caps 1 Measuring Equipment 1 1 The Sensor unit The Sensor unit is the heart of the Hydrion 10 and consists of a watertight stainless steel tube containing ion selective sensors a small motor and pre amplifiers plus data conversion A serial cable handles all communication between the Sensor Unit and the PC There is a plug in connector for the USB port of the PC that converts the serial signals from the Sensor Unit to USB signals for the PC The standard Sensor unit is capable of measuring temperature EC pH potassium sodium calcium ammonium chloride nitrate and carbon dioxide Optionally one extra sensor could be added to measure for instance redox potential dissolved oxygen fluoride bromide or lithium etc If one or more of the standard ions are not being measured because they are either in very low concentration or altogether absent from the solution then these sensors are not necessary Communication cable from Sensor Unit to PC 1 2 The Hydrion 10 Program The Hydrion 10 program is compatible with all PC s running Windows 95 98 or recom
8. 22 12 4 T25 AOS 0 0209 0 241 2 42 ig calibration 2 18 11 99 9 36 18 19 0 7 00 339 0 198 30 0 302 ee a a M 2 5 2 Processing Stored Data Results m Ei M oe oT oo dm Ii M oe Click on View in the menu bar to make a new selection remove an existing selection save the results or print the results New Selection if only a part of the results must be removed printed or saved select the desired lines Remove Selection click this option in order to remove the selection Save the results will be saved in the chosen format Print the selected results will be printed Wey New selection Remove Selection Save Print Close 21 2 5 3 Printing Stored Data Results lf Print table is selected a print preview will appear Use the icons in the menu bar to adjust the columns so that they fit on either A4 or Letter format paper To actually print out the results click on the printer icon in the menu bar Zoom to fit 00 zoom Zoom to width First page Previous page Next page Last page Printer setup Print Save report Load report Exit print preview Monster Naam Tijdstip T mperatuur pH EC kalium Netrium Calcium Ammonium Chloride Ntraet HC O3 C Pll Hom ppm ppm ppm Pem ppm ppm ppm mmol test ijk BS 14 14 58 17 46 55 214 663 318 416 25 5 32 1 0635 552 245 596 water ad 14 11 58 12 00 03 204 731 1 16E3 2 yrs 73 5 0235 113 16 4 z213 22
9. Measurement not stable This could mean that just one measurement was not stable After the results are saved the measurement will continue but new data will not be stored in the data file unless you click the Save now button or start a new measurement procedure by clicking on Start By clicking on Save now the measurement data is instantly saved By clicking on Cancel the measurement procedure is interrupted and no data is saved 2 4 2 Measuring Panel When the Hydrion 10 program is active the measuring panel will be visible One parameter is shown per box The results can be displayed in different units The result bar in which results are displayed will be white or gray If the result bar is gray a one point or multi point calibration is required For more information put the mouse pointer over the bar and you will be shown what sort of calibration is required Read the following chapters for an explanation of the boxes result bars and the text displayed 0 00E 0 0 00E 0 0 0999 17 2 4 3 Box Colors The measurement boxes can have different colors green brown gray blue or black When the color of the box is green then the measurement is stable and reliable provided that the result bar is white and no prefixes appear If the box is brown then the measurement is not yet stable Usually it takes at least a minute before a measurement is adequately stabilized In which case the box w
10. SE sensors have replaceable sensor caps All Smart Sensors except the CO2 gas sensor can easily be replaced from the Sensor unit with a sensor puller After extracting the sensor from the unit one can remove the cap This allows you to replace the inner electrolyte fluid and place a new cap onto it The complete Smart Sensor can also be replaced if that is more convenient Smart Sensors contain the most recent calibration data so a factory delivered Smart Sensor is immediately ready for use Replacement of a Smart Sensor should only be done by certified personnel or a Hydrion distributor 25
11. This is the fluid with the lowest concentration of the calibration set Follow the instructions and click on OK to start the measurement Repeat these steps when prompted for fluid 2 and fluid 3 Fluid 3 is the fluid with the highest ion concentration of the standard calibration set At the end of the procedure the measurement results will change and should then be close to the known concentrations of the last calibration fluid used After the calibration one or more boxes may turn blue or black This indicates that one or more of the sensors are working poorly blue or are altogether defective black Additionally blue or black boxes will appear when the multi point calibration procedure failed in one way or another One possible reason for such a failure is that the temperature was not kept stable during the whole procedure If ever in doubt simply repeat the procedure If the black or blue boxes continue to appear please contact us It is advisable to perform a control measurement on a standard solution with known composition like Evian bottled water after each multi point calibration Before the measurement rinse the Sensor Unit thoroughly with Evian Refer to Control Measurements in Section 2 3 3 For all calibration procedures and measurements ionic concentrations should be measured from low to high If a second multi point calibration has to be carried out immediately after the first one that failed first rinse the Sensor Unit th
12. anufactured by Merck http www merck de pH 4 ordering number 109435 pH 7 ordering number 109439 pH 9 ordering number 109461 for most purposes using only pH 4 and pH 7 is sufficient 15 2 3 5 Standard Calibration Fluid Shown below is the recipe for making a standard calibration fluid for surface water and the like This calibration fluid is especially useful for the measurement of drinking water in most areas General Remarks e The EC is adjusted to 20 e NH and NO are expressed as total weight not as pure N e HCl must be added last to the volumetric flask which is first filled with demineralized water 4000 ml for the big flask CO starts to develop as soon as HCI is added This is why the bottles with calibration fluid must be tightly sealed with as little air inside as possible Recipe for Standard Calibration fluid 2 B and 3 C Stock solution pette NH Cl 0 01 M 2 ml per 5000 ml 100 mi per 5000 ml Ca NO3 gt 0 05 M 20 ml 100 ml KHCO3 0 025 M 20 ml 100 ml CaCl 0 15 M 20 ml j 100 ml j NaHCO 0 3125 M 20 ml 100 ml j HCI 0 1 M 20 ml 100 ml Calibration fluid 2 and Calibration fluid 1 are respectively 5x and 25x diluted solutions of Calibration fluid 3 It is best to make Calibration fluid 2 directly and not as a dilution of Calibration fluid 3 Recipe for Standard calibration fluid 1 Fluid 1 A 5000
13. e measurement procedure takes longer than seven minutes to complete it will automatically terminate and the incomplete results will be saved regardless of measurement stability These incomplete results will be marked with an asterix When this occurs a warning will appear on the screen with a red dot reporting Measurement not stable See also chapter 2 4 1 Measuring a new sample Drinkwater MAREYPress Nev 2 2 Project 2 2 1 The Importance of Using Different Projects The Hydrion 10 program makes it possible for you to organize your measurement data in different ways which are stored in different unique projects For example if you are measuring in different areas you can make a separate project for each area with its own calibration set and sequence of measurement results All the information belonging to one project will be saved under this project You can also organize the different projects by using personal names for project titles 2 2 2 Creating a New Project Open the drop down menu under Project and click on New and the New Project window will appear In the white bar next to filename type the new project name i e Example prj and click on Open New Project Look in E My Documents E F aa Demo pr Demo a Helsinki prj _ Demos testB pry Demo4 Helsinki __ test6 Files of type Projects pri Cancel A validation window will then ap
14. f 250 300 ml is sufficient for measurement However it is recommended to have about 500 ml sample fluid available The additional 200 ml can be used for rinsing prior to measuring 20 2 5 Results 2 5 1 Viewing Stored Data Results The project data can be viewed by clicking on View under Project You can choose to view just today s results or the total results Only results that belong to the current project will be shown Close View Project Save data file as Print table Add a new selection Delete an existing selection View stored data vem ff ih EE Sere ETT T Bar le Duc na eenp 1 11 99 17 05 45 20 2 740 264 0 0157 0 373 1 08 Bar le Duc na eenp 1 11 99 17 13 24 20 2 fo 264 0 0168 03r 1 07 p Evian 1 11 99 17 22 14 20 2 T25 Aer 0 0241 0 239 1 95 b3 oud 11 11 99 16 01 56 20 0 6 70 314 0 106 124 0 841 ia b3 oud 11 11 99 16 05 19 20 6 B 70 314 0 102 124 0 524 test 12 11 99 12 50 17 19 2 ppe 316 0202 H 1 28 0 504 ie test 12 11 99 12 58 02 19 5 6 60 313 0 100 125 0 803 test 12 11 99 13 12 04 200 6 60 314 0 101 1 25 0 808 tes 12 11 99 13 47 01 20 3 BBS 314 1 102 1 22 0 79 El Helsinki tapwater 16 11 99 20 57 10 21 6 lt 8 02 189 H 0 062 0 350 0395 E Helsinki tapwater 17 11 99 7 28 07 14 6 z 6 08 179 0 0579 0 303 0 496 ijk 2 17 11 99 12 01 21 21 3 6 60 314 0 102 12 0 527 Evian 17 11 99 12 13 03 14 3 7 19 510 0 0233 0 248 2 61 EVAN 17 11 99 13 12
15. g The PC and power adapter are normally not included in the purchase of a measuring system 23 3 3 Sensor Unit Maintenance Always store the Sensor unit in the provided storage vessel To prevent the sensors from drying out move the Sensor Unit directly from the fluid to the storage vessel A thorough cleaning of the Sensor unit should be performed once a month This cleaning should also be performed if the Sensor unit has come in contact with polluted water i e containing bacteria fungi floating organic material etc This cleaning will prevent the growth of bacteria and or fungi on the sensor membranes which can considerably shorten the lifespan of the Sensor unit To perform this thorough cleaning of the Sensor unit immerse it in a 70 alcohol solution for exactly 30 seconds Then rinse the Sensor unit with old one point calibration fluid for an hour After this the Hydrion 10 is ready for use or long term storage 24 Appendix This version of the Hydrion 10 contains Smart Sensors inside the Sensor unit The body of a Smart Sensor functions as a mini data logger that contains calibration data that is used by the PC to convert the raw data into accurate measurement data To check the Smart Sensor data inside the Sensor unit a special monitoring program scans them at the start of each measurement session Smart Sensor data check Application 6 C projects smartsensor smartData exe ydrion s
16. ill turn green Some sensors simply need more time before the measurement is stabilized but it could also be caused by the age of the sensor or a notably large change in the concentration between samples from high to low If the dot in the upper left corner is gray then the concentration of the sample solution is above or below the measuring range of the sensor In the case the concentration of the sample solution is too high you could dilute it to bring it within the measuring range If the dot is blue then the relevant sensor is old or is otherwise working poorly It is also possible that something went wrong with the multi point calibration In which case you should repeat the calibration procedure Sensor sensitivity decreases with age This will be noticed during the multi point calibration The sensor is working but should be replaced as soon as possible If the dot is black then the relevant sensor is defective It is possible that something has gone wrong during the multi point calibration In which case you can simply repeat the calibration procedure to correct the problem However if the sensor is truly defective it will no longer give measurement results Please contact your dealer for a replacement 18 2 4 4 Symbols in the Result Bar R Defective The measurement is not yet stable the color of the box is brown The measurement is below the lower limit of the calibration range The measurement is above than the
17. l 1 Welcome to the wizard New calibrationset The wizard new calibrationset helps you creating a nev calibrationset Fill in the Edit calibrationset form and click Mest to continue Click Cancel if you want to leave without creating a new calibrationset Previous Name aam Description fijkset Number of fluids B One point calibration fluid e Dillution factor S Jt First fill in the name of the calibration set the number of calibration fluids the dilution factor and which fluid has to be used for the one point calibration procedure After that click on Next and the following window will appear As a standard we use a three point calibration for a multi point calibration set with the middle solution as the one point calibration fluid The Edit Calibration Set window assumes that you will follow this convention and has already filled in these default values for you However you can change the values in this window to a 2 for a two point calibration set or a 4 for a four point calibration set etc The dilution factor can also be changed By default the dilution factor is a five fold dilution starting from the highest concentration All calibration fluids of the same set have the same composition and only the concentrations between fluids are different The dilution factor between consecutive fluids of the same set is the same for the whole set In the following window you can give
18. mart sensor data logger lt C 20603 Hydrion B U y Michel Wissink and Rene Tegel Available commands re init toggle debug toggle verbose Q exit toggle pause display settings check sensors 2 6 control reference pump speed Initialization Ok opened port 7218 ydrion 3 USB Interface Hydrion R amp D ydrion 18 Tube Hydrion R amp D ydpion 1 detected Reference electrode detected later level sensor found Reference pump found interval 7 s ound 106 sensors Init AD converters Most important functions e R Ifasensor is unplugged while the meter is still working press r e C If everything is working well this gives a status report of the most important sensors e Q Exit Guidelines for the Replacement of Sensors and Sensor caps Aside from the temperature and EC sensor all other sensors have a limited lifespan The life expectancy of ISE lon Selective Electrode sensors varies from 4 months to over 24 months Although the pH sensor is a Smart Sensor and also an IS its has no replaceable cap and must be replaced completely The CO2 gas sensor is a Smart Sensor with a replaceable cap but it is not an ISE Replacement of the electrolyte and its cap is more complicated This sensor can not be pulled out of the Sensor unit as described below A Smart ISE Sensor consists of a body containing electronics some electrolyte fluid and a sensor cap with an ion selective membrane All the I
19. mended 2000 XP It is not recommended to run the software on Vista It is also not recommended to run the software on dual cores and if the processor supports hyperthreading Hyperthreading should be disabled in the BIOS refer to your mainboard pc s manual for instructions on how to disable hyperthreading The program converts the raw measurement data into accurate results by simultaneously correcting for temperature pH total ionic strength and other interactions that influence the measurements The user is also kept informed about the actual condition of the sensors and possible exceeding of measuring ranges Additionally the Hydrion 10 program performs calibrations and processes data before printing This leads to highly accurate and reliable results Certain variables can be changed via the control panel However these settings are only accessible by authorized personnel with the proper password i e service engineer Storage Vessel Sensor unit Computer Suitcase AC DC adaptor for PC hidden behind PC 2 The Hydrion 10 Program 2 1 General 2 1 1 Starting the Hydrion 10 Program Double click the icon with the left mouse button shown below to start the Hydrion 10 program M Double click to start Hydrion 10 Once a connection is established between the program and the Sensor unit all data from the Sensor unit will be transferred to the program When this exchange is complete the program will be ready
20. ml graduated flask 3 4 filled with demi water Fluid 3 C 200 ml pipette Composition Calibration fluids fluid 1 A Fluid 2 B fluid 3 C Re K 500 Na 6250 Caf 4000 NH5 200 CI 8200 NO 2000 HCO 4750 EC 64 microS cm EC gt 309 microS cm EC 1450 microS cm pH 6 7 pH 6 7 pH 6 7 16 2 4 Measuring 2 4 1 Measuring a New Sample Click New in the measurement window to start the measurement Handling Procedure Rinse the tube Sensor unit with sample fluid Shake off the remaining fluid Place the tube in fresh sample fluid and click on New Fill in the sample name and click on OK to start the measurement The measurement box will begin blinking and the buttons Save now and Cancel will appear After completion of the measurement the buttons Save now and Cancel disappear and the measurement box will stop blinking When all measurements are stable the values will be saved along with the date and time of the measurement If the measurement procedure takes longer than seven minutes to complete it will automatically terminate and the incomplete results will be saved regardless of measurement stability These incomplete results will be marked in the data file with an asterix When this occurs a warning will appear on the screen with a red dot reporting
21. oroughly with old Fluid 1 and leave it in old Fluid 1 for at least 15 minutes Restart the calibration procedure with fresh Fluid 1 A multi point calibration should be carried out once every two weeks and preferably also at the end of a measuring session The need for a multi point calibration is indicated in the green result boxes Some of the result bars may become grayed out If you place the mouse pointer over the result bar the program will explain why it is grayed out pH Multi Point Calibration Carry out the pH multi point calibration from a high pH value to a low pH value A pH multi point calibration should be carried out once every four weeks Immediately following this calibration the Sensor Unit must be kept for at least an hour in the Standard calibration fluid 2 used for the normal one point calibration If both a pH calibration and a normal calibration are required at the same time begin with the pH calibration The concentration of the HCOS3 ion is calculated based on the pH of the fluid and the measured concentration of dissolved CO2 in the water Thus if the pH measurement is incorrect the calculation of the HCO3 concentration will also be incorrect Type of Calibration OH multi point Every four weeks End of measuring session One point calibration Every two hours Begin of measuring session Multi point calibration Every two weeks End of measuring session The recommended buffer solutions for pH calibration are m
22. pear asking if you want to use an existing project for the layout of the new project or not 2 Use old project to create new i No Cancel You can create a new project based on an existing project by selecting it from the list below Otherwise click on No in the validation window and the default settings will appear When you close this new project all new settings will be stored under the new project name Use project Look in E My Documents SS ES Demo Dera pr Demoz Example pri Demo Helsinki pr Demo a testB pr J Helsinki TT test amp File name Demo pr Files of type Projects pril Cancel 10 2 2 3 Opening a Project Open the drop down menu under Project and click on Open Next to filename type the name of the project and click on Open You can also open a project by double clicking directly on its name in the list If you want to create a project or open a project you must first close the active project To do this click on the X button in the right hand corner of the measurement window Projects pr a 11 2 3 Calibrating 2 3 1 Creating a Calibration Set First click on Calibrate in the main menu bar and select creating a calibration set from the drop down menu then click on New A menu will appear with the parameters for the new calibration set New calibrationset E X l Edit calibrationset 10 x Genera
23. s selected from the drop down menu or toolbar button a project window will open The name of the active project will then be displayed in the title bar of the project window The project window consists of three sections 1 The left section gives information about the owner the identification number of the Sensor unit and the starting date of the active project 2 The middle section is for starting a one point calibration procedure usually repeated every two hours At the top the name of the calibration set is shown By clicking the One Point Calibration button the program starts the calibration procedure 3 The right section of the window is for measuring samples At the top the name of the sample being analyzed is shown In order to keep your measurements well organized it is advisable to fill in a new name for every new sample Starting a new measurement Click on New to start the measurement procedure The program will ask for a sample name You can either type a new name or accept the old name by pressing the ENTER key and the measurement will start Make sure that the Sensor unit is in the sample solution before pressing the ENTER key At this point you can click on Save now to save the results immediately or Cancel to abort the measurement procedure e f all measurements are sufficiently stable all boxes are green the results are automatically saved in memory and the measurement procedure is complete e lf th
24. the concentrations of the different ions that are in your new calibration fluid In the column Value fill in the concentrations of the most concentrated calibration solution In the column Calibrate fill in yes to include it in the calibration set or no to exclude it pH Na K Ca NH4 NO3 Cl and CO2 can be measured the other concentrations will be calculated You can also add new ions to the list by clicking on Add in the bottom right hand corner of the window This will open a drop down menu see next window When you feel that your list is complete click on Apply in the Edit Calibration Set window before continuing with the Wizard window 12 l Edit calibrationset General 1 Name Description Parameters Hame Value rit Calibrate Temperature measured C EC 0 measured wo cm Potassium mmol liter Calcium mmol liter Chloride mmol liter Ammonium mmolliter Nitrate mmolliter Carbon dioxide calculated mmol liter Bicarbonate 0 mmol liter Sodium O mmol liter lonicstrength F 00E 18 mmol liter Computed EC 20 0 00E 0 wo cm Carbonate Apply Restore DK Eancel New calibrationset Mowe Add the parameters you want ta Calibrate Do not worry if not everything is OF You can always change them later Click Finished to create the new calibrationset Previous Cancel To finish this procedure click on Finished in the Wizard window
25. upper limit of the calibration range The measurement is below the measuring range of the sensor The measurement is above the measuring range of the sensor A one point calibration is required A multi point calibration is required P stands for poisoning This indicates too much interference from other ions This happens especially when the sensor is sensitive to other ions For example the ammonium sensor is quite sensitive to potassium ions When you have a solution with a high potassium concentration and a low ammonium concentration the ammonium sensor only detects potassium ions In this case the measurement for ammonium is unreliable The sensor shows response but not enough for an accurate measurement It needs replacement the dot has turned blue The sensor shows no response and should be replaced immediately Except for the indication Defective all prefixes are also stored in the data file 2 4 5 Selecting Names and Units Clicking on unit with the right mouse button will display a list of possible units Click on the desired unit in this list and the results of this box will be shown in this unit You can choose a different unit for each parameter w mmol liter umol liter Ppi mgram M liter pl Clicking on the name in the box with the right mouse button will display a list of possible names Nitraat NOs w Nitrate 19 2 4 6 Recommendations for Accurate Measurements
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