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1. SevenMulti - METTLER TOLEDO

1. Parameter Minimum Maximum Unit pH value 0 000 14 000 pH Temperature 30 0 130 0 C Calibration offset 60 0 60 0 mV Calibration slope 75 0 110 0 6 4 3 Measuring with the ISFET expansion unit The ISFET expansion unit is used exclusively for pH mV and rel mV readings with sensors based on lon Sensitive Field Effect Transistors Measuring pH values Note To ensure precise pH value measurements perform a calibration before each series of measurements see Section 6 1 2 Operation of the pH menu and adjust the offset regularly see Section 6 4 2 Operation of the ISFET menu With a new ISFET electrode the offset must be adjusted with a calibration buffer of pH 7 0 before the sample reading as the offset can vary considerably Attach a suitable ISFET electrode to the ISFET expansion unit Place the ISFET electrode into the sample and press Read The pH value of the sample is shown on the display METTLER TOLEDO SevenMulti 55 The pH lon and ISFET expansion units Preparing for calibration Have a set of calibration buffers on hand At least 2 calibration buffers with different pH values are required and max 9 different calibration buffers are possible Enter the parameters of the calibration buffer in the ISFET menu under 1 1 Select a Standard Buffer Group Performing calibration Place the electrode in the first calibration buffer and press Cal to start calibrating CA
2. Checking calibration To gauge the calibration display the calibration curve mV vs ion concentration graphically with Graph The calibration points are displayed as crosses or with the segment method via straight lines Press Save to accept the calibration for subsequent measurements Press Cancel to disgard the calibration Notes e For a single point calibration the theoretical value of the ion to be determined is always used for the slope e g 59 16 mV pH for Ht 59 16 mV pF for F or 29 58 mV pX for Ca If you perform a 1 point calibration using a sensor ID with which you have already performed a multi point calibration only the offset value is changed The slope of the previous multi point calibration is retained e f the same solution is used twice for an n point calibration the warning Wrong standard appears for the second measurement e f the temperature of the ion solution deviates by more than 0 5 C from the specified value the warning Mea sured temp differs from setting appears e Ensure that the calibration standards have the same temperature during calibration as the samples will later on during measurement 52 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 6 3 5 Incremental measurement Performing incremental measuring Select the desired incremental measurement method and confirm with Enter 1 Known Addition 2 Known Subtraction 3 Sample Addition
3. 80 METTLER TOLEDO SevenMulti Appendix Designation Order No HCl pepsin solution removes protein contamination 51340068 Thiourea solution removes silver sulfide contamination 51340070 Reactivation solution for pH electrodes 51340073 8 3 Buffer groups Buffer group 1 ref 25 C METTLER TOLEDO US Buffer group 5 ref 25 C DIN 19267 5 1 67 4 01 7 09 10 25 5 1 08 4 67 6 87 9 43 13 63 10 1 67 4 00 7 06 10 18 10 1 09 4 66 6 84 9 37 13 37 15 1 67 4 00 7 04 10 12 15 1 09 4 66 6 82 9 32 13 16 20 1 68 4 00 7 02 10 06 20 1 09 4 65 6 80 9 27 12 96 25 1 68 4 01 7 00 10 01 25 1 09 4 65 6 79 9 23 12 75 30 1 68 4 01 6 99 9 97 30 1 0 4 65 6 78 9 18 12 61 35 1 69 4 02 6 98 9 93 35 1 10 4 65 6 77 9 13 12 45 40 1 69 4 03 6 97 9 89 40 1 0 4 66 6 76 9 09 12 29 45 1 70 4 04 6 97 9 86 45 1 10 4 67 6 76 9 04 12 09 50 171 4 06 6 97 9 83 50 111 4 68 6 76 9 00 11 98 Buffer group 2 ref 25 C METTLER TOLEDO Europe Buffer group 6 ref 25 C JJG 119 Chinese 5 2 02 4 01 7 09 9 45 11 72 5 1 0609 3 999 6949 9391 13 210 10 2011 4 00 7 06 9 38 11 54 10 1671 3 996 6 921 9 330 13011 15 200 4 00 7 04 9 32 11 36 15 1 003 3 996 6898 9 276 12 820 20 2 00 4 00 7 02 9 26 11 18 20 1 076 3 998 6879 9 226 12 637 25 2 00 4 01 7 00 9 21 11 00 25 1 680 4 003 6 864 9 182 12 460 30 1 99 4 01 6 99 9 16 10 82 30 1684 40010 6852 9142 12292 35 1 99 4 02 6 98 9 11 10 64 35 1 088 4019 6844 9 105 12 130 40 1 98 4 03 6 97 9 06 10 46 40 1 694 4029 68
4. Press Cancel to discard the calibration Notes e A METTLER TOLEDO titration stirrer can be connected using the Seven Rondolino Stirrer Driver accessories This allows fully automatic measurement with a high rate of repeatability e For measurements If you have selected log to interface the data is transferred after each individual reading If you have selected log to memory the data is saved as in a normal reading METTLER TOLEDO SevenMulti 35 The pH lon and ISFET expansion units 10 pH Methods in Memory A total of 40 methods for all applications can be stored 1 Load a Stored Method from Memory A list of the names of stored measurement methods appears on the screen Select the desired method with the arrow keys Display the parameters of the selected method with Select Press Load to load the parameters for the subsequent measurements 2 Save Current Settings as a Method The current settings for the reading are displayed Press the Save key The input window for entry of the name of the measurement method appears When the name has been entered press Save again to store the measurement method A method ID cannot be used twice It must first be deleted before it can be used again Otherwise the Method ID already exists error message appears 6 1 3 Measuring a pH value Note To ensure precise pH value measurements perform a calibration before each series of measurements see Section
5. Up to 9 Rondolino positions can be entered The number of sample IDs entered determines the number of samples to be measured Press Save to confirm the last entry A table with the data entered appears Press Start The measurement with the sample changer starts Calibration The current standards are displayed To change the standards exit the Rondolino menu and redefine the standards in the menu Calibration set ting Enter the number of standards and press Save to confirm your entry Press Start After the last measurement a table appears showing the cell constants METTLER TOLEDO SevenMulti 63 The Conductivity expansion unit Notes e A METTLER TOLEDO titration stirrer can be connected using the Seven Rondolino Stirrer Driver accessories This allows fully automatic measurement with a high rate of repeatability e For measurements If you have selected log to interface the data is transferred after each individual reading If you have selected log to memory the data is saved as in a normal reading 9 Analog Output Setting The conductivity expansion unit has a separate analog output where the conductivity measurement is converted into a voltage In contrast fo a common analog output on the SevenMulti the analog signal at the conductivity expansion unit is temperature compensated With this menu you can set the sensitivity of the analog output of the conductivity expansion unit for a titrat
6. e The value 0 S m for a specific resistivity tending toward infinity is permanently programmed in the Seven Multi M 66 METTLER TOLEDO SevenMulti The Conductivity expansion unit 7 2 7 2 1 The TDS mode Menu structure of the TDS mode 1 Measurement Setting Page 68 1 Select Reference Temperature 2 Select Temp Correction Method 1 Linear Correction 2 Non linear Correction Natural Water 3 Off 3 Set TDS Factor 1 Set Calibration Standard 1 10 84 500 amp 1413 uS cm 12 88 mS cm 2 Saturated NaCl 3 Enter Cell Constant during Calibration 4 Enter your Special Standard 2 Set Calibration Reminder 1 Off 2 Remind by Interval Time 3 Select Endpoint Formats 1 Auto 2 Manual 3 Timed 4 Set MTC Temperature Page 62 5 Set Alarm Limits Page 69 1 TDS Max Limit 2 TDS Min Limit 3 Temperature Max Limit Page 61 4 Temperature Min Limit 5 Cell Constant Max Limit 6 Cell Constant Min Limit 6 Timed Interval Readings 1 On 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Off Page 62 7 Select Data Transfer Mode Page 63 1 Automatic Data Transfer 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Manual Data Transfer to Memory 8 Activate Rondolino Sample Changer Page 63 1 Measurement 2 Calibration 9 TDS Methods in Memory 1 Load a Stored Method from Memory Page 64 2 Save Current Settings as a Method
7. Operating Instructions SevenMulti Contents Content 1 SevenMulti 3 1 1 Introduction 3 1 2 Safety precautions 3 13 Description of the instrument 4 1 3 1 Key field 4 1 8 2 Symbols in the measurement display 4 1 3 3 Connections 5 1 3 4 Pin assignments 6 14 Analog output 6 1 5 Maintenance 6 1 5 1 Cleaning the SevenMulti 6 1 5 2 Cleaning the electrodes 7 1 5 3 Disposal 7 2 Installation 8 EN Unpacking checking scope of delivery 8 2 2 Mounting electrode arm 8 2 3 Installing removing expansion units 8 24 Installing removing communication module 9 2 5 Connecting to the mains network 9 2 6 Connection of additional instruments to the TTL communication module 10 2 7 Connection of a computer via the USB communication module 10 3 Operation of SevenMulti 11 3 1 Operation with softkeys 1 3 2 Operation using the alphanumeric keypad 12 3 2 1 Alphanumeric input 12 3 3 Entering IDs 12 3 3 1 Enter Sample ID 12 3 3 2 Enter Sensor ID Sensor SN 13 3 3 3 Enter user ID 13 3 3 4 Enter ID using a barcode reader 13 3 4 The Data menu 14 3 4 1 Menu structure of the Data menu 14 3 4 2 Operation of the Data Menu 15 3 5 The i menu 18 3 5 1 Help information 18 3 5 2 Instrument Self test 18 3 5 3 Remote Control On Off 18 3 5 4 Routine Expert Mode 18 4 The system menu 19 4 1 Menu structure of the system menu 19 4 2 Operation of the system menu 20 5 The Dual menu 25 5 Menu structure of the Dual Channel m
8. 4 Sample Subtraction Press Start if you want to use the current parameters for your measurement You are requested to place the electrode into the first solution Start the reading with Meas The measurement display appears until the first reading is complete You are then directed to place the electrode into the second solution and to start reading again with Meas This procedure is repeated until all of the solutions designated by the measurement method have been read At the end of the procedure the results are saved in the database or transferred to a printer or PC depending on the selected data transfer mode f you would like to change the parameters press Edit The following table appears V sample V stand C stand Enter the selected parameters using the alphanumeric keypad and press Save to confirm Press Start to start your measurement f you want to use an existing incremental method press Load The existing incremental methods in the data base will be displayed Press Load to select a method Press Start to begin the measurement Example Sample Addition Place electrode into the calibration standard and press Meas The first measurement starts automatically When the measurement is complete you will be directed to place the electrode into the second solution Add the specified volume of sample solution to the calibration standard and mix the solut
9. METTLER TOLEDO SevenMulti 67 The Conductivity expansion unit 7 2 2 Operation of the TDS menu TDS is the concentration of dissolved solids which pass through a filler with a pore size of 0 45 micrometers These are typically the following components carbonate bicarbonate chloride sulfate phosphate nitrate calcium mag nesium sodium organic ions and other ions TDS is often viewed as an important quantity for life in water as a certain ion concentration is essential for organ isms If the value is too high or too low life is impossible TDS can also be used for the determination of drinking water quality TDS behaves in a linear manner and is directly proportional to the conductivity of a sample TDS mg L is calculated by multiplying the conductivity value mS cm by the TDS factor If two expansion units are attached first ensure that the desired expansion unit is selected Press Mode and press TDS in the menu that appears to select the TDS mode Call up the TDS menu with Menu The operation of the TDS menu corresponds to that of the conductivity menu except for items 1 Measurement Setting and 5 Set Alarm limits A detailed description can be found in Section 7 1 2 Operation of the Conductiv ity menu on pages 58 to 65 1 Measurement Setting 1 Select Reference Temperature You can select between the reference temperatures 20 C and 25 C In the measurement the TDS value of the sample is refer
10. Q Input offset current el JOTA METTLER TOLEDO SevenMulti 77 Appendix 8 1 3 Technical data of Conductivity expansion unit Measurement range Conductivity 0 001 uS cm 1000 mS cm 1 00E 6 1 00E 2 S m TDS 0 01 mg L 1000 g L Factor 0 40 1 00 Salinity 0 00 80 00 ppt Resistivity 0 00 20 00 MQ cm Temperature 5 C 130 C Temperature compensation ATC b C 130 C MIC 30 C 130 C Measurement range Reso Auto range Scientific notation lution 5 00 9 99E 7 S m 0 01E 7 S m 1 00 9 99E 6 S m 0 01E 6 Sim 1 00 9 99E 5 S m 0 01E 5 S m 0 001 1 999 HS cm 0 001 uS cm 1 00 9 99E 4 S m 0 01E 4 Sim 2 00 19 99 uS cm 0 01 uS cm 1 00 9 99E 3 S m 0 01E 3 Sim 20 0 199 9 uS cm 0 1 uS cm 1 00 9 99E 2 S m 0 01E 2 S m 200 1999 HS cm 1 uS cm 1 00 9 99E 1 S m 0 01E 1 Sim 2 00 19 99 mS cm 0 01 mS cm 1 00 9 99E 0 Sim 0 01E 0 S m 20 0 199 9 mS cm 0 1 mS cm 1 00 9 99E 1 Sim 0 01E 1 Sim 200 1000 mS cm 1 mS cm Limits of errors 0 5 of measured value Analog output Output impedance lt 20 KQ 8 1 4 Technical data of lon expansion unit lon mode Measurement range 1 00E 9 9 99E 9 mmol l mol l mg l 0 001 9999 ppm 0 001 96 999 9 Resolution 1 of the least significan
11. Select Stability Criterion 8 Select Data Transfer Mode Page 34 1 Fast 1 Automatic Data Transfer 2 Normal 1 Log fo Memory 3 Strict 2 Log to Interface 3 Log to Memory and Interface 1 Auto 2 Manual Data Transfer to Memory 2 Manual 9 Activate Rondolino Sample Changer Page 35 3 Timed 1 Measurement SE 10 ISFET Methods in Memory Page 36 1 Load a Stored Method from Memory 2 Save Current Settings as a Method METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 6 4 2 Operation of the ISFET menu If two expansion units are attached first ensure that the desired expansion unit is selected Call up the ISFET menu with Menu The operation of the ISFET menu corresponds to operation of the pH menu except for point 2 Offset and 6 Set alarm limits A detailed description can be found in Section 6 1 2 Operation of the pH menu pages 30 to 36 You are directed to place the electrode into a calibration buffer of pH 7 0 Place the ISFET electrode into the calibraione buffer of pH 7 0 and start the offset measurement with Meas The offset of the electrode is automatically measured and adjusted 6 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout Before entering a limit you can activate or deactivate the alarm for this limit
12. Transfer Measurement Data 15 TIL 6 TTL communication module 10 U USB 6 USB communication module 10 UserID 13 USP EP tables 83 USP Mode 59 METTLER TOLEDO SevenMulti 85 86 METTLER TOLEDO SevenMulti METTLER TOLEDO SevenMulti 87 88 METTLER TOLEDO SevenMulti Quality certificate Development production and testing according to ISO9001 Iso Iso 9001 4400P Environmental management system according to ISO14001 D Worldwide service Our extensive service network is among the best in the world and ensures maximum availability and service life of your product C European conformity The CE conformity mark provides you with the assurance that our products comply with the most recent EU directives On the Internet You will quickly find lots of essential information about our products our services and our company at INTERNET http www mt com Printed on 100 chlorine free paper for the sake of our environment Il ll N I P51710416 Mettler Toledo GmbH 2006 ME 51710416 Printed in China 0605 2 12 Mettler Toledo GmbH Analytical Sonnenbergstrasse 74 CH 8603 Schwerzenbach Switzerland Tel 41 0 44 806 7711 Fax 41 0 44 806 7350
13. When calculating the desired concentration of the sample after the sec ond sample addition the same formula as above is used but with the following solution concentration and volume Csrp2 7 em Verpi Csamplel Vsample1 Vari Vsample1 Nana Vem Vsamplet AE2 change of the mV signal after addition of the second sample increment The third and fourth sample additions are performed accordingly A table with the current values for the following parameters appears C Stand concentration of the ion to be determined in the calibration standard unit selected as usual V Stand volume of calibration standard in mL V Sample1 volume of the first sample increment or the first thinning in mL V Sample2 volume of the second sample increment or the second thinning in mL V Sample3 volume of the third sample increment or the third thinning in mL V Sample4 volume of the fourth sample increment or the fourth thinning in mL Parameter entry occurs as described under 1 1 Known Addition 4 Sample Subtraction With the sample subtraction the potential of a highly diluted solution with a known volume and concentra tion is measured A small known volume increment of a sample solution which forms a precipitate with the measured ion with low solubility is tnen added The electrode responds to the standard but not to the sample to be determined The potential is measured again and the concentration of the sample calculated using the fo
14. 3 Screen Setting Page 20 1 Screen Contrast 2 Screen Saver 1 Off 2 On 4 Interface Settings Page 21 1 Output Input 1 Output 1 Printer 2 BalanceLink Hperterminal 2 Input 2 LabX 5 Printout Format Page 22 1 GLP 2 Standard 3 Short 6 Instrument Expansion Unit ID Page 23 1 Set Instrument ID 2 Set Expansion Unit ID 7 Login System settings PIN Codes 1 Set Instrument Login PIN code Page 23 2 Set system settings PIN code 3 Set PIN code for deletion 8 Qualified Measurement only 1 On 2 Off Page 24 METTLER TOLEDO SevenMulti The system menu 4 2 Operation of the system menu To call up the system menu press Sys in the measurement display Note This menu is protected by a lab manager s PIN code Upon delivery the PIN code is set to 000000 Please change the lab manager s PIN code to prevent unauthorised access 1 Select Language The following languages are available for the system German English French Spanish and Italian Select the desired language and confirm with Select 2 Set Time and Date 1 SetTime You can select between two display formats 24 Hour Format E g 18 56 12 Hour Format E g 06 56 PM For 12 Hour Format select the time of day with AM PM AM morning PM after 12 noon m Set Date You can select between two display formats mm dd yy month day year E g 09 27 03 dd mm yy day month year E g 27 09 03 3 S
15. 6 1 2 Operation of the pH menu Attach a suitable pH electrode to the pH expansion unit f the pH electrode does not have a temperature sensor enter the sample temperature manually see pH menu 5 Set MTC Temperature Place the pH electrode in the sample and press Read The pH value of the sample is shown on the display n the automatic or timed endpoint format the endpoint becomes stable either automatically or after a pre defined time and the display freezes End the measurement manually by pressing Read again 6 1 4 Calibrating a pH electrode Preparing for calibration Have calibration buffers on hand Max 5 different calibration buffers are possible Enter the parameters of the calibration buffers in the pH menu under 1 1 Set Calibration Buffer n the pH menu under 1 2 Select Calibration Mode select the calibration mode 36 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units Calibrating Place the electrode in the first calibration buffer and press Cal to start calibrating CAL 1 on the screen indicates that the first calibration point is being measured If a standard other than the selected one is to be used it can still be changed using the il key Depending on the endpoint format the value is displayed when the measured value is stable Rinse off electrode Place the electrode in the second calibration buffer and press Cal to start calibrating again
16. 9600 e Data bit 7 8 e Stop bit 1 2 e Parity no odd even e Handshake no xon xoff 2 BalanceLink Hyperterminal e Baud rate 1200 2400 4800 9600 e Data bit 7 8 e Stop bit 1 2 e Parity no odd even e Handshake no xon xoff 2 Input e Baud rate 1200 2400 4800 9600 e Data bit 7 8 e Stop bit 1 2 e Parity no odd even e Handshake no xon xoff 2 LabX e Baud rate 1200 2400 4800 9600 e Data bit 7 8 e Stop bit 1 2 e Parity no odd even e Handshake no xon xoff Use t to select the input field and select the desired setting using Change Press Save to save your settings METTLER TOLEDO SevenMulti 21 The system menu 5 Printout format This menu item allows you to define the desired format for your printout If you select GLP Format you can enter a header for your printout 1 GLP Example for GLP Format Measurement in pH mode 2 Standard Example for Standard Format Measurement in pH mode Channel L Channel L Format GLP i Date 25 JUL 2005 i o Time 09 31 Endpoint Automatic Sensor ID INLAB413 ATC MTC MTC Sensor SN 5051234 Sample ID WATER Last Cal 24 JUL 2005 Result 6 997pH Cal time 11 25 mV 0 2mV Instrument ID ANAT o Instrument SN 123456789 EES se Exp unit ID PHI Exp unit SN 230006p 3 Short User MEIER Meihod LAP Example for Short Format Measurement in pH mode Endpoint Automatic ATC MTC MTC Channel L Time int 120s 6 997 pH 25 0 C MIC Automation
17. End measurement by pressing Read again 3 Timed With the timed endpoint measurement is started with Read The measurement is ended automatically when the set time period expires You set this time period 3 s to 3600 s in the following input window 2 Set MTC Temperature manual temperature compensation If you are working without a temperature sensor during the measurement enter the temperature of the sample in this menu 30 C 130 C 3 Timed Interval Readings In this menu you activate and deactivate series measurements and set the time interval between two successive measurements 1 On The input window for the time interval 3 s to 2400 s appears When the time interval is entered a menu appears for selection of the mode of measured data recording 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface 2 Off no series measurement 26 METTLER TOLEDO SevenMulti The Dual menu 4 Select Data Transfer Mode l Automatic Data Transfer 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log
18. Page 41 1 Measurement 8 mV rel mV Methods in Memory Page 42 1 Load a Stored Method from Memory 2 Save Current Settings as a Method 9 rel mV Offset Setting Page 42 1 Enter an Offset Value 2 Test a Reference Sample 1 You can only set this in the rel mV menu METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 6 2 2 Operation of the mV rel mV menu If two expansion units are attached first ensure that the desired expansion unit is selected Press Mode and press mV rel mV in the menu that appears to select the mV rel mV mode Call up the mV rel mV menu with Menu 1 Select Resolution and Stability Criterion l Select Display Resolution In this menu you select the resolution to which the measurement display is to be shown 1 X no decimal place 2 X X one decimal place Select Stability Criterion In this menu you can define the stability criterion of your measurement Stability criterion for fast The measured signal may not change by more than 0 6 mV in 4 seconds Stability criterion for normal The measured signal may not change by more than 0 1 mV in 6 seconds Stability criterion for strict The measured signal may not change by more than 0 03 mV in 8 seconds or by more than 0 1 mV in 30 seconds 2 Select Endpoint Formats l Auto With the automatic endpoint the selected stability criterion determines the end of an individual reading de pending on the behavior of
19. buffer group Note If the measured mV value for the first calibration point deviates by more than 60 mV approx x 1 pH from the theoretical value of the calibration buffer point the Offset out of range warning ap pears 2 Auto buffer recognition Off Switch off the automatic buffer recognition if you want to specify the order of the pH buffers yourself or if the offset value deviates too much from the theoretical value e g in readings using electrodes that contain a non aqueous electrolyte A table for selection of the pH buffers appears Press Change to define the order of the pH buffers Navigate to the next input field using Press Save to accept the list 30 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 2 Set a Customized Buffer Group This menu allows you to define your own set of pH buffers with up to 5 different temperatures for each buffer for calibrating SevenMulti Please note that the temperature difference between buffers must be at least 5 C and the difference be tween the pH values must be at least 1 Nr Temp Buffer 1 Buffer2 Buffer 3 Buffer 4 Buffer 5 Mm se Nm I Press Change to access the table You can navigate within the table using the t and keys and delete the value using Press End to finish editing the table and Save to store the values 1 Auto buffer recognition On
20. buffer is used twice or two calibration buffers whose mV values differ less tnan 60 mV are used the Wrong Buffer warning appears In the calibration the measured temp differs from setting warning appears if the temperature deviation from the temperature range entered is more than 0 5 C for standard buffer groups and more than 1 C for user defined buffer groups If you perform a 1 point calibration using a sensor ID with which you have already performed a multi point calibration only the offset value is changed The slope of the previous multi point calibration is retained METTLER TOLEDO SevenMulti 37 The pH lon and ISFET expansion units 6 2 ThemV rel mV mode 6 2 1 Menu structure of the mV rel mV mode 1 Select Resolution and Stability Criterion Page 39 1 Select Display Resolution 1 X 2 XX 2 Select Stability Criterion 1 Fast 2 Normal 3 Strict 2 Select Endpoint Formats Page 39 1 Auto 2 Manual 3 Timed 3 Set MTC Temperature Page 40 4 Set mV rel mV Alarm Limits Page 40 1 mV Mox Limit 2 mV Min Limit 3 Temperature Max Limit 4 Temperature Min Limit 5 Timed Interval Readings Page 40 1 On 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Off 6 Select Data Transfer Mode Page 41 1 Automatic Data Transfer 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Manual Data Transfer to Memory 7 Activate Rondolino Sample Changer
21. calibration the nominal cell constant of your conductivity sen sor must be known 5 An input window appears in which the cell constant 5 of the conductivity sensor used is entered Auto Standard Recognition Off If you switch off the automatic standard recognition you can define the order of the predefined standards yourself A table to enter the order of the standards appears Press Change to select a standard Press to navigate to the input field Press Save to accept the selected standards 2 Saturated NaCl 60 METTLER TOLEDO SevenMulti The Conductivity expansion unit 3 Enter Cell Constant during Calibration If the cell constant of the conductivity cell being used is accurately known you can enter it directly in the SevenMulti Press Cal in the measurement display the request to enter the cell constant then appears 4 Enter your Special Standard If you are using your own conductivity standard for calibration of the conductivity sensor you can enter the conductivity of the calibration standard in mS cm in this screen Lowest possible special standard 0 00005 mS cm This corresponds to the conductivity of natural water at 25 C exclusively caused by the autoprotolysis of water For the special standard you can enter up to 5 temperature dependent values in the table Use t to navigate within the table delete using and press Save to save the values Set Calibration Reminder 1 O
22. electrode types 13 endpoint format 33 40 48 62 Endpoint Formats 26 33 39 48 61 EP Mode highly purified water 59 EP Mode purified water 60 F f25 factor 59 69 76 f25 table 82 H Help function 18 l ID 12 Incremental measurement 53 Incremental Methods 46 Input 21 Installation 8 Instrument ID 23 Instrument Self test 18 Interface Settings 21 Interval Readings 26 34 40 49 62 lon menu 45 ISFET 55 79 i menu 18 K Key field 4 Known Addition 46 Known Subtraction 46 L LabX 21 LabX direct pH 21 Language 20 Linear correction 58 68 75 Linear Method 31 45 Login password 23 M Mains connection 9 Maintenance 6 Manual temperature compensation 26 33 40 48 62 Measurement 27 35 41 50 63 Measurement Units 45 60 Measuring absolute potential 42 Measuring a pH value 36 Measuring conductivity 65 Measuring ion concentration 51 Measuring ISFET 55 Measuring mV value 42 Measuring rel mV value 43 Measuring relative potential 43 84 METTLER TOLEDO SevenMulti Index Measuring total dissolved solids TDS 70 Memory Functions 14 15 Menu structure of the conductivity mode 57 Menu structure of the Data menu 14 Menu structure of the Dual Channel menu 25 Menu structure of the lon mode 44 Menu structure of the ISFET expansion unit 54 Menu structure of the mV rel mV mode 38 Menu structure of the system menu 19 Method 28 36 42 51 64 MTC temperature 26 33 40 48 62
23. from two holes in the base Mount the base to the instrument with the supplied mounting screw so that the free end of the base points toward the rear Place the electrode arm into the holder and secure the connection with the supplied mountingscrew Adjusting electrode arm The position of the electrode arm can be adjusted with the rotary tensioning knob To loosen the rotary tensioning knob turn the knob anticlockwise To tighten the rotary tensioning knob turn the knob clockwise 2 3 Installing removing expansion units SevenMulti can be equipped with 2 expansion units The expansion units can be combined together as you wish with one exception It is not possible to have 2 Conductivity expansion units If you are only working with one expansion unit you can equip the free connection with a blank expansion unit Order No 51302874 Please note that you must first switch off the instrument and then switch it on again if you change the expansion unit during operation 8 METTLER TOLEDO SevenMulti Installation Installing expansion unit Remove the cover from the desired slot left or right Save the cover Insert the expansion unit into the slot until it engages Removing expansion unit Press the coloured button on the expansion unit and remove it from the instrument If you do not wish to insert another expansion unit into this slot replace the cover or use a blank expan
24. mV in 26 seconds 1 Set Calibration Standard You can define the calibration standards here Select the unit and press Enter to access the table for entering temperature values and ion concentrations Enter values using the alphanumeric keypad use to navigate within the table and to delete Press Save to end the editing the table and accept the values 2 Select Calibration Mode 1 Segmented Method The segmented method is the most modern method for precise lon measurements The calibration curve is made up of line segments joining the individual calibration points rather than a linear regression through them Non linear behavior frequently occurs at low ion concentrations The segmented method is preferred for high precision measurements 2 Linear Method With this method the calibration curve is determined via a linear regression line The linear method should only be used at higher concentrations where the calibration curve is still mainly linear METTLER TOLEDO SevenMulti 45 The pH lon and ISFET expansion units 3 Set Calibration Reminder 1 Off no calibration reminder 2 Remind by Interval Time If the calibration reminder is active you are reminded to perform a new calibration after a specified amount of time has passed The reminder comes in the form of a message on the bottom line of the measurement display Activating this item leads to an input window into which you enter the time interval 1 to
25. or MTC automatic or manual temperature pH compensation 16 4 250 C ATC DL Ai 8 10 Information line e g for the calibration reminder 15 123 9 11 Timed Interval Reading active 14 fh 2 00 4 01 12 Condition of the attached electrode pH 13 1 EM Electrode in good condition 10 amp Electrode requires cleaning 12 11 amp Electrode is defective User name 13 Sensor ID 2 Routine mode active 14 Calibration standards A OLP printout active IIe 8 data transfer to printer PC active 16 Measured specified temperature 4 Interface settings LabX 17 Selected channel 5 Date and time 4 METTLER TOLEDO SevenMulti SevenMulti 1 3 3 Connections Connections on the SevenMulti Connections on the pH and Ion expansion unit OsOQ Q Sensor Ref ATC P1000 Connections on the Conductivity expansion unit Sensor Titrator Connections on the ISFET expansion unit T Sensor DC Data Analog Mains connection socket RS232 interface Analog output of electrode potential for pH lon expansion unit 2 connections for expansion units connection for communication modules The expansion units can be combined
26. press Read to complete the measurement Press Read again to start a new measurement Note Calibration is not possible in mV mode 42 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 6 2 4 Measuring relative potential rel mV value Calling up rel mV mode Press Mode in the measurement display Then press Rel mV in the following menu The measurement display is now in mV The measured or entered offset is subtracted automatically Reading offset Call up the rel mV menu with Menu and confirm 9 Offset Setting with Enter Select 2 Test a Reference Sample and confirm with Enter Place electrode into the reference sample Start the reference measurement with Meas and wait until the measurement display freezes Press Save to accept the offset Press Exit to cancel the measurement Entering offset manually Call up the rel mV menu with Mode and confirm 9 Offset Setting with Enter Confirm 1 Enter an Offset Value with Enter Enter offset in mV 1999 9 1999 9 mV Prss Save to accept the offset Press Exit to cancel the input Measuring relative potential Place the electrode into the sample and press Read The relative potential at the electrode is displayed in mV in the display Depending on the set endpoint wait until the measurement display freezes or press Read to complete the mea surement Press Read again to start a new measu
27. range appears 3 Off If you switch off temperature correction the conductivity value at the actual temperature is displayed a 0 C 5 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout Before entering a limit you can activate or deactivate the alarm for this limit Parameter Minimum Maximum Unit Resistivity 0 00 20 00 MQ cm Temperature 30 0 130 0 C Cell Constant 0 000001 200 0 l em 7 4 3 Reading resistivity The resistivity is yielded from the reciprocal of the measured conductivity of the sample Press Mode in the conductivity display Activate conversion into resistivity 2 cm with Res Note If you change conductivity sensor a calibration must be performed because every sensor has its own cell constant and the calculation of the resistivity Is based on the cell constant For calibration see section 7 1 4 Cali brating a conductivity sensor Attach a suitable conductivity sensor to the Conductivity expansion unit If the conductivity sensor does not have a temperature sensor enter the sample temperature manually see Resistivity menu 4 Set MTC Temperature Place the conductivity sensor into the sample and press Read The resistivity of the sample is shown on the display 76 METTLER TOLEDO
28. the data will be saved as in a normal measurement METTLER TOLEDO SevenMulti 27 The Dual menu 6 Dual Channel Method in Memory Up to 5 dual channel methods can be stored Before saving a dual channel method you first need to save a single channel method for each channel otherwise an error message appears Please save single channel method first A dual channel method is the combination of two single channel methods 1 Loada Stored Dual Channel Method from Memory A list of the names of stored measurement methods appears on the screen Select the desired method with the arrow keys Press Select to show the two single channel methods of the selected dual channel method Press Load to load the parameters for the subsequent measurements 2 Save Current Settings as a Method The entry box for entering the Method ID appears The current methods and measurement modes of both channels are displayed Press Save to store the methods as a dual channel method 5 3 Measuring with two expansion units If two expansion units are installed the screen is divided into two areas while measuring Left for the expansion unit installed on the left Right for the right expansion unit dual display The measurements are performed with both expansion units simultaneously Note To restart a reading the endpoints of the readings must have been reached in both channels Settings for the expansion units Settings that are the same
29. the name of the measurement method appears When the name has been entered press Save again to store the measurement method A method ID cannot be used twice It must first be deleted before it can be used again Otherwise the Method ID already exists error message appears 7 1 3 Measuring conductivity Note If the conductivity sensor is changed calibration must be performed again as each sensor has a different cell constant Attach a suitable conductivity sensor to the Conductivity expansion unit f the conductivity sensor does not have a temperature sensor enter the sample temperature manually see Conductivity menu 4 Set MTC Temperature Place the conductivity sensor into the sample and press Read The conductivity of the sample is shown on the display 7 1 4 Calibrating a conductivity sensor The conductivity sensor can be calibrated in 2 ways 1 Calibration with a conductivity standard 2 Entry of the cell constant see section 7 1 2 Operation of the Conductivity menu Preparing for calibration Have pre fabricated or your own conductivity standard on hand n the Conductivity menu under 2 1 Set Calibration Standard or enter the conductivity of the conductivity stan dard Performing calibration Place sensor into the conductivity standard and press Cal to start calibrating CAL on the screen indicates that the calibration is being carried out If you have activated automatic stan
30. the theoretical slope Offset is OK if in the range of x 30 mV Response time is OK if less than 60 seconds The limits within the meter apply to a test using pH 4 and 7 buffers or similar 3 Select Resolution and Stability Criterion 1 Select Display Resolution In this menu you select the resolution to which the measurement display is to be shown 1 X X one decimal place 2 X XX two decimal places 3 X XXX three decimal places 32 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 2 Select Stability Criterion In this menu you can define the stability criterion of your measurement Stability criterion for fast The measured signal may not change by more than 0 6 mV in 4 seconds Stability criterion for normal The measured signal may not change by more than 0 1 mV in 6 seconds Stability criterion for strict The measured signal may not change by more than 0 03 mV in 8 seconds or by more than 0 1 mV in 30 seconds 4 Select Endpoint Formats 1 Auto With the automatic endpoint the selected stability criterion determines the end of an individual reading de pending on the behavior of the sensor used This ensures an easy quick and precise measurement Start measurement with Read The measurement ends automatically when the measured value is stable 2 Manual Start measurement with Read End the measurement by pressing Read again 3 Timed With the timed endpoint measurement i
31. to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface Manual Data Transfer to Memory Automatic measurement data transfer is deactivated If you would like to store the measured values after a measurement press Data see Section 3 4 2 Operation of the Data Menu 5 Activate Rondolino Sample Changer l Measurement If you want to start the measurement with the sample changer using the currently displayed settings Press Start The reading with the sample changer starts If you want to change the sample ID Press Edit The input window to enter the sample IDs of the first 5 Rondolino positions appears Enter the sample ID using the alphanumeric keypad or the barcode reader Using move to the input window of the next Rondolino position Up to 9 Rondolino positions can be entered The number of sample IDs entered determines the number of samples to be measured Press Save to confirm the last entry A table showing the data entered appears Press Start The measurement with the sample changer starts Notes e A METTLER TOLEDO titration stirrer can be connected using the Seven Rondolino Gier Driver accessories This allows fully automatic measurement with a high degree of repeatability e f you have selected log to interface the data is transferred to the printer after each individual measurement If you have selected log to memory
32. together as you wish with one exception It is not possible to have 2 Conductivity expansion units Sensor Ref ATC Pt1000 Sensor Titrator Sensor Electrode connection socket Reference electrode connection socket Connection for temperature sensor NTC 30 kQ Connection for temperature sensor Pt 000 Electrode connection socket Titration unit output analog signal Electrode connection socket METTLER TOLEDO SevenMulti SevenMulti 1 3 4 Pin assignments RS232 TTL Socket 9 Pin D Sub female Pin assignment RS232 54351 Din NC Pin NC Tries P Pin2 TxD out Pin7 NC e OC d Pin 3 Bi in Pin8 NC oz Pind NC Pin9 NC SR Pin 5 RSGND Pin assignment TTL Pin 1 In 1 Pin6 Out4 Pin 2 In 2 Pin7 Ground Pin3 Out 1 Pin8 Ground Pin4 Out2 Pin9 5 Volt Pinb NC USB Pin assignment USB Pin VCC d Pin2 D Pin3 D USB e ol o Pin4 Ground 34 1 4 Analog output For the pH and lon expansion units the analog output of the SevenMulti supplies a voltage proportional to the displayed measured value pH mV rel mV and ion concentration The polarity of the output corresponds to the polarity at the measurement electrode The voltage at the analog output is not temperature compensated e f a pH or lon expansion unit is operated on both channels the measurement signa
33. 1 088 1 086 1 083 1 081 1 079 1 076 1 074 1 071 1 069 22 1 067 1 064 1 062 1 060 1 057 1 055 1 053 1 051 1 048 1 046 23 1 044 1 041 1 039 1 037 1 035 1 032 1 030 1 028 1 026 1 024 24 1 021 1 019 1 017 1 015 1 013 1 011 1 008 1 006 1 004 1 002 25 1 000 0 998 0 996 0 994 0 992 0 990 0 987 0 985 0 983 0 981 26 0 979 0 977 0 975 0 973 0 971 0 969 0 967 0 965 0 963 0 961 27 0 959 0 957 0 955 0 953 0 952 0 950 0 948 0 946 0 944 0 942 28 0 940 0 938 0 936 0 934 0 933 0 931 0 929 0 927 0 925 0 923 29 0 921 0 920 0 918 0 916 0 914 0 912 0 911 0 909 0 907 0 905 30 0 903 0 902 0 900 0 898 0 896 0 895 0 893 0 891 0 889 0 888 31 0 886 0 884 0 883 0 881 0 879 0 877 0 876 0 874 0 872 0 871 32 0 869 0 867 0 866 0 864 0 863 0 861 0 859 0 858 0 856 0 854 33 0 853 0 851 0 850 0 848 0 846 0 845 0 843 0 842 0 840 0 839 34 0 837 0 835 0 834 0 832 0 831 0 829 0 828 0 826 0 825 0 823 35 0 822 0 820 0 819 0 817 0 816 0 814 0 813 0 811 0 810 0 808 8 5 Conductivity standards T C 10 uS cm 84 HS cm 500 pS cm 1413 pS em 12 88 mS Saturated em NaCl mS cm 5 6 13 53 02 315 3 896 8 22 155 5 10 7 10 60 34 359 6 1020 9 33 177 9 15 7 95 67 61 402 9 1147 10 48 201 5 20 8 97 75 80 451 5 1278 11 67 226 0 25 10 00 84 00 500 0 1413 12 88 251 3 30 11 03 92 19 548 5 1552 14 12 271 4 35 12 14 100 92 602 5 1667 15 39 304 1 82 METTLER TOLEDO SevenMulti Appendix 8 6 USP EP tables Conductiviy requirements yS cm for USP EP h
34. 1000 h 3 Incremental Methods Incremental readings are especially useful when individual analyses are to be carried out as only one solu tion and two potential measurements are necessary Calibration need only be performed before the first read ing with the sensor as the slope of the sensor generally remains the same for several months 1 Known Addition For the known addition the potential of a sample with a known volume is measured After a small known volume increment of a standard with a known concentration is added the potential is measured again and the concentration of the sample is calculated using the following formula Csomple Csrp Ver sample Vey lt 10 4S Vsomple whereas Csampie desired concentration of sample in the selected unit U e g ppm Cap known concentration of the standard U Vstp known volume of the standard mL Vsample known volume of the sample mL AE change of the mV signal after addition of the standard increment mV S slope of the sensor being used mV pX saved in the instrument A table with the current values for the following parameters appears V sample volume of the sample in mL V stand volume of calibration standard in mL C stand concentration of the ion to be determined in the calibration standard unit selected as before 2 Known Subtraction For the known subtraction the potential of a sample with a known volume is measured A small known volume incremen
35. 38 9 072 11 975 45 1 98 4 04 6 97 9 03 10 28 45 1 700 4 042 6834 9 042 11 828 50 1 98 4 06 6 97 8 99 10 10 50 1 700 4 055 6833 9015 11 697 Buffer group 3 ref 20 C Merck standard buffers Buffer group 7 ref 25 C Technical Buffer 5 2 01 4 04 7 07 9 16 12 41 5 2 02 4 01 7 09 10 65 10 2011 4 02 7 05 9 11 12 26 10 2011 4 00 7 06 10 39 15 200 4 01 7 02 9 05 12 10 15 200 4 00 7 04 10 26 20 2 00 4 00 7 00 9 00 12 00 20 2 00 4 00 7 02 10 13 25 2 00 4 01 6 98 8 95 11 88 25 2 00 4 01 7 00 10 00 30 2 00 4 01 6 98 8 91 11 72 30 1 99 4 01 6 99 9 87 35 2 00 4 01 6 96 8 88 11 67 35 1 99 4 02 6 98 9 74 40 200 4 01 6 95 8 85 11 54 40 1 98 4 03 6 97 9 61 45 200 4 01 6 95 8 82 11 44 45 1 98 4 04 6 97 9 48 50 2 00 4 00 6 95 8 79 11 33 50 1 98 4 06 6 97 9 35 Buffer group 4 ref 25 C DIN 19266 NIST Buffer group 8 ref 25 C JIS Z 8802 Japanese 5 1 068 4004 6950 9 392 13 207 5 1 668 3 999 6 951 9 395 10 1 070 4 001 6922 9 331 13 003 10 1 670 3 998 6 923 9332 15 1 072 4 001 6900 9 277 12 810 15 1 072 3 999 6900 9 276 20 1 076 4 0038 6880 9 228 12 627 20 1 675 4 002 6 881 9 225 25 1 680 4 008 6 865 9 183 12 454 25 1 079 4 008 6 865 9 180 30 1685 4015 6853 9 144 12 289 30 1 088 4 015 6853 9 139 35 1691 4026 6845 9 110 12 133 35 1688 4024 6844 9102 40 1 097 4 036 6837 9 076 11 984 40 1 694 40385 6838 9 068 45 1 700 4049 6834 9 046 11 841 45 1 700 4 047 6834 9 038 50 1712 4 064 6833 9 018 11 705 50 1707 4 060 6833 9 011 METTLER TOL
36. 73 74 The Resistivity mode 74 74 Menu structure of the Resistivity mode 74 7 4 2 Operation of the Resistivity menu 75 7 4 3 Reading resistivity 76 8 Appendix 77 8 1 Technical data 71 8 1 1 Technical data of the SevenMulti 71 8 1 2 Technical data of pH expansion unit 77 8 1 3 Technical data of Conductivity expansion unit 78 8 1 4 Technical data of lon expansion unit 78 8 1 5 Technical data of ISFET expansion unit 79 8 2 Accessories 80 8 3 Buffer groups 8 8 4 Temperature correction factors for 82 8 5 Conductivity standards 82 8 6 USP EP tables 83 Index 84 2 METTLER TOLEDO SevenMulti SevenMulti l SevenMulti 1 1 Introduction SevenMulti Modular expansion at any time An ingenious instrument concept based on precise electrochemical measuring technique combined with latest op tions for your challenges in the laboratory e Extend the instrument s possibilities with durable plug in expansion units at any time With no effort make it a dual channel instrument e Control a sample changer or operate the SevenMulti using a computer software program 1 2 Safety precautions Measures for your protection Never work in an environment subject to explosion hazards The housing of the instrument is not gas tight explosion hazard due to spark formation corrosion caused by the ingress of gases When using chemicals and solvents comply with the instructions of the producer and the general lab saf
37. CAL 2 on the screen indicates that the second calibration point is being measured Depending on the endpoint format the value is displayed when the measured value is stable Repeat the procedure for all calibration buffers End calibration with End after reading of the last calibration buffer A table with the calibration results appears in the display Checking calibration To gauge the calibration display the calibration curve mV vs pH graphically with Graph The calibration points are displayed as crosses e With the segment method the calibration points are connected by straight lines e With the linear method the calibration curve is calculated as a best fit straight line Press Save to use the calibration and make an adjustment for subsequent measurements Press Cancel to discard the calibration Notes for Standard and Customized buffer groups The pH electrode can only be calibrated in the temperature range in which the pH values of the selected buffer group are defined e g between 5 C and 50 C for standard buffer groupsor for the range you have defined for the user defined buffer groups Otherwise the warning Buffer temp out of range appears If tne measured mV value for calibration points 2 through n deviates by more than 60 mV approx 1 pH from the theoretical value of the calibration buffer during an n point calibration the Slope out of range warning appears If for an n point calibration the same calibration
38. Coefficient To determine the o coefficient the sample has to be measured at two different temperatures First measure the sample at a temperature that is different to that of the reference temperature and that is in the typical range of the sample temperature Then measure the sample at the reference temperature A window with the calculated value of o appears Press Save to accept the value If you exit the menu by pressing Exit the result is discarded 58 METTLER TOLEDO SevenMulti The Conductivity expansion unit 2 Non Linear Correction Natural Water The conductivity of natural water shows strong non linear temperature behaviour For this reason use the non linear correction for natural water The measured conductivity is multiplied by the factor fas for the measured temperature see table in appen dix and thus corrected to the reference temperature of 25 C Gros Gr fos If another reference temperature is to be used e g 20 C the conductivity corrected to 25 C is divided by 1 116 see fo for 20 0 C Gro Gr fog 1 116 Note Conductivity measurements of natural water can only be performed at temperatures ranging from O C to 36 C Otherwise the warning Temp out of nLF correction range appears 3 Off If you switch off temperature correction the conductivity value at the actual temperature is displayed a O C 4 USP Mode In USP mode SevenMulti tests wheth
39. EDO SevenMulti 81 Appendix 8 4 Temperature correction factors f25 C 0 Jl 2 3 4 5 6 7 8 9 0 1 918 1 912 1 906 1 899 1 893 1 887 1 881 1 875 1 869 1 863 1 1 857 1 851 1 845 1 840 1 834 1 829 1 822 1 817 1 811 1 805 2 1 800 1 794 1 788 1 783 1 777 1 772 1 766 1 761 1 756 1 750 3 1 745 1 740 1 734 1 729 1 724 1 719 1 713 1 708 1 703 1 698 4 1 693 1 688 1 683 1 678 1 673 1 668 1 663 1 658 1 653 1 648 5 1 643 1 638 1 634 1 629 1 624 1 619 1 615 1 610 1 605 1 601 6 1 596 1 591 1 587 1 582 1 578 1 573 1 569 1 564 1 560 1 555 7 1 551 1 547 1 542 1 538 1 534 1 529 1 525 1 521 1 516 1 512 8 1 508 1 504 1 500 1 496 1 491 1 487 1 483 1 479 1 475 1 471 9 1 467 1 463 1 459 1 455 1 451 1 447 1 443 1 439 1 436 1 432 10 1 428 1 424 1 420 1 416 1 413 1 409 1 405 1 401 1 398 1 384 11 1 390 1 387 1 383 1 379 1 376 1 372 1 369 1 365 1 362 1 358 12 1 354 1 351 1 347 1 344 1 341 1 337 1 334 1 330 1 327 1 323 13 1 320 1 317 1 313 1 310 1 307 1 303 1 300 1 297 1 294 1 290 14 1 287 1 284 1 281 1 278 1 274 1 271 1 268 1 265 1 262 1 259 15 1 256 1 253 1 249 1 246 1 243 1 240 1 237 1 234 1 231 1 228 16 1 225 1 222 1 219 1 216 1 214 1 211 1 208 1 205 1 202 1 199 17 1 196 1 193 1 191 1 188 1 185 1 182 1 179 1 177 1 174 1 171 18 1 168 1 166 1 163 1 160 1 157 1 155 1 152 1 149 1 147 1 144 19 1 141 1 139 1 136 1 134 1 13 1 128 1 126 1 123 1 12 1 118 20 1 116 1 113 1 111 1 108 1 105 1 103 1 101 1 098 1 096 1 093 21 1 091
40. L 1 on the display indicates that the first calibration point is being measured If a standard other than the selected one is to be used it can still be changed using the l key Depending on the endpoint format selected the value is shown when the measured value is stable Place electrode into the second buffer and press Cal to continue calibrating CAL 2 in the display indicates that the second calibration point is being measured Depending on the endpoint format selected the value is shown when the measured value is stable Repeat this procedure for further calibration buffers End calibration with End after measurement of the last calibration buffer A table with the calibration results appears on the display Checking calibration To gauge the calibration display the calibration curve mV vs pH graphically with Graph The calibration points are displayed as crosses With the segment method the calibration points are connected by straight lines Press Save to accept the calibration for subsequent measurements Press Cancel to disgard the calibration 56 METTLER TOLEDO SevenMulti The Conductivity expansion unit 7 The Conductivity expansion unit In addition to conductivity measurement the conductivity expansion unit allows the measurement of TDS salinity and resistivity The menus for these measurement types are described in the following 7 1 The conductivity mode 7 1 1 Menu structure o
41. Measurement Data 1 Display All 2 Search by Date 3 Search by User 4 Search by Sample ID 5 Search by Sensor ID 6 Search by Method Type 2 Review Transfer Calibration Data 1 pH 2 lon 3 Conductivity 4 ISFET Review Transfer Method Data Review Transfer Current Setting Review Transfer Incremental Meas Data oa P og Delete Measurement Data Methods Delete Measurement Data Delete All Delete by Date Delete by User Name Delete by Sample ID Delete by Sensor ID Delete by Method Type 2 Delete Calibration Data 1 pH 2 Conductivity 3 lon 4 ISFET 3 Delete Methods 4 Delete Incremental Meas Data 5 Empty Memory On OO P GAMM ca 14 METTLER TOLEDO SevenMulti Installation 3 4 2 Operation of the Data Menu Press Data to call up the Data menu In this menu you can display overviews of Measurement Data Calibration Data Method Data Instrument settings You can transmit the displayed data to an attached computer or printer Either the entire data record or individual data records are transmitted In addition in this menu you can also save data records and delete them again from memory 1 Store Transfer Current Reading If you want to manually save a reading press Data when the reading has ended measurement display freez es n this menu open 1 Store Transfer Current Reading and confirm with Save The measurement data is stored Note the message
42. Pos 3 Sample ID WATER Result 6 997pH mV 0 2mV Temperature 23 0 C Alarm Max pH Min Temp Signature 22 METTLER TOLEDO SevenMulti The system menu 6 Instrument Expansion unit ID l Set Instrument ID The current instrument ID is displayed in the input field of the input window Enter an alphanumeric instrument ID max 6 places The entered instrument ID remains intact when the instrument is switched off Note When SevenMulti is delivered no instrument ID is set Set Expansion unit ID In this menu you can allocate an expansion unit ID to the expansion units in the left and right slots Select right or left slot with Select The input window for the ID of the expansion unit appears The current ID is displayed via the input field Enter an alphanumeric ID max 6 places The menu for selection of the expansion unit in the left or right slot reappears Repeat steps for the second expansion unit or end procedure with Exit 7 Login System settings PIN codes l Set Instrument Login PIN code Setting a login password can protect SevenMulti from unauthorised use When the instrument is switched on the user must enter the login password in order to be able to use the instrument When SevenMulti is delivered no login password is set Activate deactivate login password protection with Password protection On Off Enter a numeric login password max 6 places The inpu
43. SevenMulti Appendix 8 Appendix 8 1 Technical data 8 1 1 Technical data of the SevenMulti Screen LCD Outputs RS232 serial Settable baud rate 1200 2400 4800 9600 baud data bits 7 8 stop bit 1 2 parity no odd even Handshake no xon xoff Analog output with pH and lon expansion unit only Output impedance lt 10 kQ Ambient conditions Room temperature 5 C 40 C Relative humidity 80 at 31 C decreasing linearly to 50 at 40 C Overvoltage category Degree of contamination 2 Dimensions 190 x 240 x 65 mm Weight Basic device 850g expansion unit 135g Power supply The SevenMulti is equipped with a power supply adapter suitable for your area USA 120 V 60 Hz 10 VA 9 V DC Europe 230 V 50 Hz 10 VA 9 V DC UK 240 V 50 Hz 10 VA 9 V DC Japan 100 V 50 60 Hz 10 VA 9 V DC Materials Housing ABS reinforced with PC Expansion units ABS reinforced with PC Electrode arm ABS reinforced with PC Keypad Polyester 8 1 2 Technical data of pH expansion unit pH mV Temperature C Measurement range 2 000 20 000 1999 9 1999 9 30 0 130 0 Resolution 0 001 0 01 0 1 0 1 0 1 Limits of error 0 002 0 1 0 1 Relative mV yes Temperature compensation ATC 5 0 C 130 0 C MTC 30 0 C 130 0 C Sensor input Input impedance 23 10
44. TOLEDO SevenMulti 57 The Conductivity expansion unit 7 1 2 Operation of the Conductivity menu If two expansion units are attached first ensure that the desired expansion unit is selected Press Mode and press Cond in the menu that appears to select the conductivity mode Call up the Conductivity menu with Menu 1 Measurement Setting LP Select Reference Temperature You can select between the reference temperatures 20 C and 25 C The conductivity of the sample is refer enced to the selected temperature during measurement Select Temp Correction Method USP EP 1 Linear Correction The conductivity of a solution increases when the temperature increases With most solutions a linear interrelationship between conductivity and temperature is given In such cases select the linear correction method 1 Enter Temp Correction Coefficient The input window for the temperature correction coefficient O 10 96 C appears The measured conductivity is corrected and displayed using the following formula Gire Dei 1 CaCT Tre 100 96 whereas conductivity measured at temperature T mS cm Dune conductivity mS cm displayed by the instrument calculated back to the reference temperature Tp a linear temperature correction coefficient C a 0 no temperature correction T measured temperature C Tret Reference temperature 20 C or 25 C 2 Determine Temp Correction
45. To a linear temperature correction coefficient C a O no temperature correction T measured temperature C Tret Reference temperature 20 C or 25 C 2 Determine Temp Correction Coefficient To determine the o coefficient the sample has to be measured at two different temperatures First measure the sample at a temperature that is different to that of the reference temperature and that is in the typical range of the sample temperature Then measure the sample at the reference temperature A window with the calculated value of o appears Press Save to accept the value If you exit the menu by pressing Exit the result is discarded METTLER TOLEDO SevenMulti 75 The Conductivity expansion unit 2 Non Linear Correction Natural Water The conductivity of natural water shows strong non linear temperature behaviour For this reason use the non linear correction for natural water The measured conductivity is multiplied by the factor fz5 for the measured temperature see table in appen dix and thus corrected to the reference temperature of 25 C Gros Gr fos If another reference temperature is to be used e g 20 C the conductivity corrected to 25 C is divided by 1 116 see fos for 20 0 C Gro Gr 55 1 116 Note Conductivity measurements of natural water can only be performed at temperatures ranging from O C to 36 C Otherwise the warning Temp out of nLF correction
46. USP EP tables The method corresponds to that described under 4 USP mode Note In the EP mode temperature correction is automatically switched off a 0 C If GLP printout is selected the warning Conductivity exceeds EP limit also appears on the printout METTLER TOLEDO SevenMulti 59 The Conductivity expansion unit 6 EP Mode purified water In the EP mode purified water the SevenMulti checks whether the measured conductivity of the water is not greater than the value allowed according to EP European Pharmacopoeia for purified water at the temperature concerned see 8 6 USP EP tables The method corresponds to that described under 4 USP mode Note In the EP mode temperature correction is automatically switched off a 0 C If GLP printout is selected the warning Conductivity exceeds EP limit also appears on the printout 3 Select Measurement Units 1 Auto Range pS cm or mS cm The display automatically switches to the best measurement range The measurement unit is adapted to the measured conductivity value 2 X XX E X S m The measured value display is given in scientific notation S m uS cm S m mS cm E 6 0 01 E 0 10 E 5 0 1 E 1 100 E 4 1 E 2 1000 E 3 10 E 2 100 E 1 1000 2 Calibration Settings 1 Set Calibration Standard 1 10 84 500 amp 1413 pS cm 12 88 mS cm 1 Auto Standard Recognition On For automatic standard recognition in the
47. ames of stored measurement methods appears on the screen Select the desired method with the arrow keys Display the parameters of the selected method with Select Press Load to load the parameters for the subsequent measurements 2 Save Current Settings as a Method The current settings for the reading are displayed Press the Save key The input window for entry of the name of the measurement method appears When the name has been entered press Save again to store the measurement method A method ID cannot be used twice It must first be deleted before it can be used again Otherwise the Method ID already exists error message appears 6 3 3 Measuring ion concentration Notes e To ensure precise ion concentration measurements perform a calibration before each series of measurements see Section 6 3 2 Operation of the lon menu e Temperature dependencies cannot be programmed for the reference solutions For this reason the warning Measured temperature differs from setting appears if the temperature deviates from the specification by more than 0 5 C during calibration Attach a suitable ion sensitive electrode to the lon expansion unit f the electrode does not have a temperature sensor set the MTC temperature see lon menu 5 Set MTC Tem perature or use a separate Pt1000 or NTC 30 kO temperature sensor Place the electrode in the sample and press Read The ion concentration of the sample is sho
48. and select if the currently shown data record or if all filtered data should be transferred to the connected PC or printer METTLER TOLEDO SevenMulti Installation 6 Delete Measurement Data Methods Note This menu is protected by a PIN code Upon delivery the PIN code is set to 000000 Please change the PIN code to prevent unauthorised access With this menu you can delete stored measurement data calibration data and methods based on specific criteria 1 Delete Measurement Data deletes measurement data from memory based on the following criteria All measurement data Measurement data recorded on a specific date Measurement data recorded by a specific user Measurement data recorded with a specific sample ID Measurement data recorded with a specific sensor ID Measurement data recorded with a specific method 2 Delete Calibration Data deletes all calibration data for the selected sensor ID from memory Select measurement parameter pH conductivity ion ISFET with Select Select sensor ID with t or and press Del to delete the data record Confirm or cancel the action when the message This will delete all your selected data appears with Yes or Exit accordingly Note Only sensor IDs that are currently not in use are available in the list for deletion An active sensor ID cannot be deleted 3 Delete Methods removes method data for specific measurement Select measurement parameter pH conductivi
49. ble 24 METTLER TOLEDO SevenMulti The Dual menu 9 The Dual menu 5 1 Menu structure of the Dudl Channel menu 1 Select Endpoint Formats Page 26 1 Auto 2 Manual 3 Timed 2 Set MTC Temperature Page 26 3 Timed Interval Readings Page 26 1 On 1 Log fo Memory 2 Log to Interface 3 Log to Memory and Interface 2 Off 4 Select Data Transfer Mode Page 27 1 Automatic Data Transfer 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Manual Data Transfer to Memory 5 Activate Rondolino Sample Changer Page 27 1 Measurement 6 Dual Channel Method in Memory Page 28 1 Load a Stored Method from Memory 2 Save Current Settings as a Method METTLER TOLEDO SevenMulti 25 The Dual menu 5 2 Operation of the Dual Channel menu If you have installed two expansion units you can use the Dual Channel menu to set certain parameters that are the same for both expansion units Specific settings for the two expansion units must however be set individually for each unit using the right or left channel 1 Select Endpoint Formats 1 Auto With the automatic endpoint special algorithms determine the end of an individual measurement depending on the behaviour of the sensor used This ensures an easy quick and precise measurement Start measurement with Read The measurement ends automatically when the measured value is stable 2 Manual Start measurement with Read
50. creen Setting 1 Screen Contrast You can set the contrast of the screen to one of 32 levels with the t keys m Screen Saver 1 Off 2 0n In this menu you set the amount of time which passes before the screen saver is activated 5 99 minutes If SevenMulti is not operated during this time the screen saver is activated Press any key and the display is activated again independent of the function of the key Note The display has a limited lifetime and therefore we recommend activating the screen saver or switching of the meter when not in operation 20 METTLER TOLEDO SevenMulti The system menu 4 Interface Settings This menu allows you to set the interface parameters depending on the requirements of the connected instruments You can set different parameters for the input and output of the instrument if for example you want to connect a bar code reader and a printer with different baud rates The specific parameters for the printer are set under 1 1 Output and for the barcode reader under 1 2 Input Note If you want to operate the SevenMulti using a computer software program you must select LabX and set the specific parameters With this setting there is no automatic printout through the interface anymore The data must be requested through PC software If you are using LabX direct pH for data transfer you also need to select LabX 1 Output Input 1 Output 1 Printer e Baud rate 1200 2400 4800
51. dard recognition SevenMulti automatically recognizes the predefined standards If a standard other than the selected one is to be used it can still be changed using the l key Depending on the endpoint format selected the value is displayed when the measured value is stable If you want to calibrate with one conductivity standard End calibration with End The value of the calculated cell constant unit 1 cm is shown on the display Press Save to accept the calibration and adjust the stored cell constant for subsequent measurements Press Cancel to disgard the calibration METTLER TOLEDO SevenMulti 65 The Conductivity expansion unit If you want to calibrate over a wide conductivity range with several standards Place the sensor in a new standard and press Cal again Depending on the endpoint format selected the value is displayed when the measured value is stable Repeat these steps for further standards Press End to end the calibration On the screen the values of the determined cell constants in the different con ductivity ranges are displayed Press Save to accept the calibration and adjust the stored cell constant for subsequent measurements Press Cancel to disgard the calibration Notes e Calibration with the conductivity standard programmed in the instrument can only be performed at a tempera ture of O C to 35 C Otherwise the warning Standard temp out of range appears
52. e If you exit the menu by pressing Exit the result is discarded 2 Non Linear Correction Natural Water The conductivity of natural water shows strong non linear temperature behaviour For this reason use the non linear correction for natural water The measured conductivity is multiplied by the factor LG for the measured temperature see table in appen dix and thus corrected to the reference temperature of 25 C De Gr fos If another reference temperature is to be used e g 20 C the conductivity corrected 25 C is divided by 1 116 see fo for 20 0 C Oro Gr 55 1 116 Note Conductivity measurements of natural water can only be performed at temperatures ranging from 0 C to 36 C Otherwise the warning Temp out of nLF correction range appears 3 Off If you switch off temperature correction the conductivity value is displayed at the actual temperature a 0 C 3 Set TDS Factor TDS is calculated by multiplying the conductivity value by the TDS factor The input window for the TDS factor appears Enter factor between 0 4 and 1 0 and save with Save 5 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout Before entering a limit you can activate or deactivate the alarm for this limit Parameter Minim
53. e measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface 2 Off no series measurement 6 Select Data Transfer Mode 1 Automatic Data Transfer 1 Log to Memory The measured data is saved the in SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface 2 Manual Data Transfer to Memory Automatic measurement data transfer is deactivated If you would like to store the measured values after a measurement press Data see Section 3 4 2 Operation of the Data Menu METTLER TOLEDO SevenMulti 49 The pH lon and ISFET expansion units 9 Activate Rondolino Sample Changer 1 Measurement If you want to start the measurement with the sample changer using the currently displayed settings Press Start The measurement with the sample changer starts If you want to change the sample IDs Press Edit The input window to enter the sample IDs of the first 5 Rondolino positions appears Enter the sample ID using the alphanumeric keypad or the barcode reader Change to the next Rondolino position using Up to 9 Rondolino positions can be entered The number of the entered sample IDs determines the number of samples to be measured Press Save to confirm your la
54. enced to the selected temperature 2 Select Temp Correction Method 1 Linear Correction Since the TDS value is calculated from the conductivity of a solution you should select a temperature correction method For most solutions the relationship between conductivity and temperature is linear In such cases select the linear correction method 1 Enter Temp Correction Coefficient The input window for the temperature correction coefficient O 10 96 C appears The measured TDS value of the sample is corrected and displayed using the following equation Gire 01 1 CaCT Tre 100 96 whereas conductivity measured at temperature T mS cm Dune conductivity mS cm displayed by the instrument calculated back to the reference temperature Tp a linear temperature correction coefficient C a 0 no temperature correction T measured temperature C Tret Reference temperature 20 C or 25 C 68 METTLER TOLEDO SevenMulti The Conductivity expansion unit 2 Determine Temp Correction Coefficient To determine the o coefficient the sample has to be measured at two different temperatures First measure the sample at a temperature that is different to that of the reference temperature and that is in the typical range of the sample temperature Then measure the sample at the reference temperature A window with the calculated value of o appears Press Save to accept the valu
55. ent measurement Auto endpoint A AA fA A Read ih Manual endpoint M E Read gt M M Read gt iM Timed endpoint T E gt fT T Read gt iM 1 The actual endpoint format last column not the preselected is stored with the data 4 Set MTC Temperature manual temperature compensation If you are working without a temperature sensor during the conductivity measurement enter the temperature of the sample in this menu 30 C 130 C The SevenMulti uses this temperature to calculate the conductivity value based on the selected reference temperature 5 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout Before entering a limit you can activate or deactivate the alarm for this limit Parameter Minimum Maximum Unit Conductivity 0 000 1100 000 mS cm Temperature 30 0 130 0 C Cell Constant 0 000001 200 0 l em 6 Timed Interval Readings In this menu you activate and deactivate series measurements and set the time interval between two successive measurements 1 On The input window for the time interval 3 s to 2400 s appears When the time interval is entered a menu appears for selection of the mode of measured data recording 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to In
56. enu 25 5 2 Operation of the Dual Channel menu 26 5 3 Measuring with two expansion units 28 METTLER TOLEDO SevenMulti Contents 6 The pH lon and ISFET expansion units 29 6 1 The pH mode 29 6 1 1 Menu structure of the pH mode 29 6 12 Operation of the pH menu 30 6 1 8 Measuring a pH value 36 6 1 4 Calibrating a pH electrode 36 6 2 The mV rel mV mode 38 6 2 1 Menu structure of the mV rel mV mode 38 6 2 2 Operation of the mV rel mV menu 39 6 2 3 Measuring absolute potential mV value 42 6 2 4 Measuring relative potential rel mV value 43 6 3 The lon mode 44 6 3 1 Menu structure of the lon mode 44 6 3 2 Operation of the lon menu 45 6 3 3 Measuring ion concentration 5 6 3 4 Calibrating an ion sensitive electrode 52 6 3 5 Incremental measurement 53 6 4 The ISFET expansion unit 54 6 4 1 Menu structure of the ISFET expansion unit 54 6 4 2 Operation of the ISFET menu 55 6 4 3 Measuring with the ISFET expansion unit 55 7 The Conductivity expansion unit 57 71 The conductivity mode 57 71 1 Menu structure of the conductivity mode 57 71 2 Operation of the Conductivity menu 58 74 3 Measuring conductivity 65 714 Calibrating a conductivity sensor 65 7 2 The TDS mode 67 7 2 1 Menu structure of the TDS mode 67 7 2 2 Operation of the TDS menu 68 7 2 3 Measuring total dissolved solids TDS 70 7 3 The Salinity mode H 731 Menu structure of the Salinity mode 71 7 3 2 Operation of the Salinity menu 72 7 3 3 Reading salinity
57. er the measured conductivity of the water is not greater than the permissible value for purified water or water for injection at the relevant temperature according to the USP United States Pharmacopoeia see 8 6 USP EP tables This is the first step of the USP test If the value is lower the water fulfills the USP requirements If the value is greater the warning Conductivity exceeds USP limit appears Then you must proceed in accordance with the second step of the USP test If you have more stringent requirements for purified water than the USP you can use the USP factor 10 96 to 100 96 to take these into account Example At 15 C the water may not exceed a conductivity of 1 uiS cm in order to fulfill tne USP require ments in the first step A warning appears with a USP factor of 100 96 if the measured conductivity is greater than 1 uS cm With a USP factor of 80 96 this message appears when the measured conductivity is greater than 0 8 uiS cm Note In the USP mode temperature correction is automatically switched off a 0 C If GLP printout is selected the warning Conductivity exceeds USP limit also appears on the printout 5 EP Mode highly purified water In the EP mode highly purified water the SevenMulti checks whether the measured conductivity of the water is not greater than the value allowed according to EP European Pharmacopoeia for highly purified water at the temperature concerned see 8 6
58. ering a limit you can activate or deactivate the alarm for this limit Parameter Minimum Maximum Unit mV value 1 999 1 999 mV Temperature 30 0 130 0 C 5 Timed Interval Readings In this menu you activate and deactivate series measurements and set the time interval between two successive measurements l m On The input window for the time interval 3 s to 2400 s appears When the time interval is entered a menu appears for selection of the mode of measured data recording 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface Off no series measurement METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 6 Select Data Transfer Mode l Automatic Data Transfer 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface Manual Data Transfer to Memory Automatic measurement data transfer is deactivated If you would like to store the measu
59. ety rules Measures for operational safety Have the instrument serviced only by METTLER TOLEDO Service Dry off any liquids sprayed immediately The instrument is not watertight Exclude the following environmental influences e powerful vibrations e direct sunlight e atmospheric humidity greater than 80 e corrosive gas atmosphere e temperatures below 5 C and above 40 C e powerful electric or magnetic fields METTLER TOLEDO SevenMulti 3 SevenMulti 1 3 Description of the instrument 1 3 1 Key field Switches SevenMulti on off Activates the input of sample sensor or user IDs Saves displays sends and deletes data Opens the i menu provides context sensitive help SevenMulli MEIT ER TOLEDO 0008 Starts calibration Starts ends reading EJ o a 3 1 Softkey assignment variable 2 Thecurrent softkey assignment is shown to the left on the screen 3 X Alphanumeric key field 1 3 2 Symbols in the measurement display In addition to the measured value additional symbols and messages appear on the screen which allow you to check the measurement process for each expansion unit 1 2 3 4 5 6 Selected method 5 LAB R ar E D 00 09 2009 7 pees value with unit E 8 Endpoint 17 4 Left METHOD 1 6 x automatic m manual T timed 7 00 J 9 ATC
60. f the conductivity mode 1 Select Reference Temperature 1 On 2 Select Temp Correction Method USP EP 1 Log to Memory 1 Linear Correction 2 Log to Interface 2 Non linear Correction Natural Water 3 Log to Memory and Interface 3 Off 2 Off 4 USP Mode 5 EP Mode highly purified water 6 EP Mode purified water 1 Automatic Data Transfer 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 3 Select Measurement Units 1 Auto Range uS cm mS cm 2 X XX E X S m 2 Manual Data Transfer to Memory 2 Calibration Settings Page 60 1 Set Calibration Standard 8 Activate Rondolino Sample Changer Page 63 1 10 84 500 amp 1413 uS cm 12 88 mS cm 1 Measurement 2 Saturated NaCl 2 Calibration 3 Enter Cell Constant during Calibration 4 Enter your Special Standard 9 Analog Output Settings Page 64 2 Set Calibration Reminder 1 20 uS cm middle point 1 Off 2 200 uS cm middle point 2 Remind by Interval Time 3 2 mS cm middle point 3 Select Endpoint Formats Page 61 4 20 mS cm middle point 1 Auto 5 200 mS cm middle point 2 Manual 6 Whole range 3 Timed 10 Conductivity Methods in Memory Page 64 4 Set MTC Temperature Page 62 1 Load a Stored Method from Memory 2 Save Current Settings as a Method 5 Set Alarm Limits Page 62 1 Conductivity Max Limit 2 Conductivity Min Limit 3 Temperature Max Limit 4 Temperature Min Limit 5 Cell Constant Max Limit 6 Cell Constant Min Limit METTLER
61. ff no calibration reminder 2 Remind by Interval Time If the calibration reminder is active you are reminded to perform a new calibration after a specified amount of time has passed The reminder comes in the form of a message on the bottom line of the measurement display Activating this item leads to an input window into which you enter the time interval 1 to 1000 h 3 Select Endpoint Formats l Auto With the automatic endpoint special algorithms determine the end of an individual measurement depending on the behaviour of the sensor used This ensures an easy quick and precise measurement Start reading with Read The reading ends automatically when the measured value is stable Stability criterion for conductivity measurements The endpoint is taken when the measured conductivity differs by less than 0 4 from the average over the last 6 seconds Manual Start measurement with Read End the measurement by pressing Read again Timed With the timed endpoint measurement is started with Read The measurement is ended automatically when the set time period expires You set this time period 3 s to 3600 s in the following input window METTLER TOLEDO SevenMulti 61 The Conductivity expansion unit Information on the display The following symbols appear on the display depending on the endpoint setting Preselected format Start of mea Signal stability Endpointed surem
62. for both expansion units can be entered using the Dual Menu as described in the current chapter Settings that are specific to the particular expansion unit must be entered using the individual channels Select the right or left expansion unit with Left or Right Make menu and or mode settings as described for the expansion units 28 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 6 The pH lon and ISFET expansion units 6 1 6 1 1 The pH mode Menu structure of the pH mode 1 Set Calibration Buffer 1 Select a Standard Buffer Group 2 Set a Customized Buffer Group 2 Select Calibration Mode 1 Segment method 2 Linear method 3 Set Calibration Reminder 1 Off 2 Remind by Interval Time 6 Set Alarm Limits Page 34 1 pH Max Limit 2 pH Min Limit 3 Temperature Max Limit 4 Temperature Min Limit 5 Calibration Offset Max Limit 6 Calibration Offset Min Limit 7 Calibration Slope Max Limit 8 Calibration Slope Min Limit 2 Electrode test Page 32 7 Timed Interval Readings Page 34 3 Select Resolution and Stability Criterion Page 32 Us l 1 Log to Memory 1 Select Display Resolution 2 Log to Interface er 3 Log to Memory and Interface 2 X XX 3 XX AUT 2 Select Stability Criterion 8 Select Data Transfer Mode Page 34 1 Fast 1 Automatic Data Transfer 2 ig 1 Log to Memory 3 Strict 2 Log to Interface 4 Select Endpoint Formats Page 33 3 Log fo Memory and Interface 1 Aut
63. g a temperature sensor enter the temperature of the sample 30 C 130 C in this menu SevenMulti uses this temperature to calculate the correct value of the electrode slope for this temperature and shows the temperature compensated ion value on the measurement display 6 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout 48 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units Before entering a limit you can activate or deactivate the alarm for this limit Parameter Minimum Maximum Unit lon Concentration 1 00e 09 9 99e 09 mmol L 1 00e 09 9 99e 09 mol L 0 001 9999 ppm 1 00e 09 9 99e 09 mg L 0 001 999 9 Temperature 30 0 130 0 Rb Calibration Slope 85 0 110 0 7 Timed Interval Readings In this menu you activate and deactivate series measurements and set the time interval between two successive measurements 1 On The input window for the time interval 8 s to 2400 s appears When the time interval is entered a menu appears for selection of the mode of measured data recording 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface Th
64. ighly purified water EP purified water Temperature USP EP EP C uS cm highly purfied water purified water uS cm uS cm 0 0 6 0 6 24 5 0 8 0 8 10 0 9 0 9 3 6 15 1 0 1 0 20 1 1 1 1 4 3 25 1 3 13 5 1 30 1 4 1 4 5 4 35 1 5 1 5 40 3 1 7 6 5 45 1 8 1 8 50 1 9 1 9 7 1 55 2 1 2 1 60 22 2 2 8 1 65 2 4 2 4 70 2 5 2 5 9 1 75 2 7 2 7 9 7 80 2 7 2 7 9 7 85 2 7 27 90 2 7 2 7 9 7 95 2 9 2 9 100 3 1 3 1 10 2 METTLER TOLEDO SevenMulti 83 Index Index Symbols a coefficient 58 69 75 A Accessories 80 Alarm Limits 34 40 48 55 62 69 73 76 Alphanumeric input 12 Analog output 6 64 ATC 5 Auto buffer recognition 30 31 Auto Sequential 12 Auto Standard Recognition 60 B Barcode reader 13 Buffer Group 30 Buffer groups 81 C Calibrating an ion sensitive electrode 52 Calibrating a conductivity sensor 65 Calibrating a pH electrode 36 Calibrating conductivity sensor 65 Calibrating pH electrode 36 Calibration 35 36 45 50 52 63 Calibration reminder 32 46 61 Cell constant 60 61 Cleaning 7 Communication module 9 Conductivity menu 58 Conductivity standards 82 Connections 5 D Data menu 14 Data Transfer Mode 27 34 41 49 63 Date 20 Delete Measurement Data Methods 17 Delete Methods 17 Display resolution 39 Disposal 7 Dual menu 25 E electrode arm 8 Electrode test 32
65. ion Place electrode into the solution and press Meas The measurement starts automatically When the measurement is complete you will be directed to place the electrode into the third solution Repeat this procedure for the further somple additions max 4 When all additions have been measured the calculated concentration of the sample solution after each addition is displayed and can be printed or transferred to a computer METTLER TOLEDO SevenMulti 53 The pH lon and ISFET expansion units 6 4 The ISFET expansion unit Besides the ISFET mode the ISFET expansion unit also offers the possibility of measuring in mV and rel mV The description of the mV rel mV menu can be found in Section 6 2 The mV rel mV mode 6 4 1 Menu structure of the ISFET expansion unit 6 Set Alarm Limits Page 55 1 Set Calibration Buffer 1 pH Max Limit 1 Select a Standard Buffer Group 2 pH Min Limit 2 Set a Customized Buffer Group 3 Temperature Max Limit 2 Select Calibration Mode 4 Temperature Min Limit 1 Segment method mE 2 2 iinegrinelhiod 5 Calibration Offset Max Limit 3 Sof Calibration Reminder 6 Calibration Offset Min Limit 1 Off 7 Calibration Slope Max Limit 2 Remind by Interval Time 8 Calibration Slope Min Limit 2 Offset Test Page 55 3 Select Resolution and Stability Criterion Page 32 Toon 1 Select Display Resolution ee ee LXX 2 Log to Interface a XXX 3 Log to Memory and Interface 3 X XXX 2 Off 2
66. ion is that you select LabX in the system settings You can block the control on the meter itself with Remote Control On Only the start and end of a measurement and a calibration is possible from the meter All other changes to settings have to be carried out via commands from the PC software 3 5 4 Routine Expert Mode You can operate the SevenMulti in the Routine mode or in the Expert mode In the expert mode you have complete access fo all the instrument settings and functions whereas in the routine mode user rights are restricted e g system settings are not possible If routine mode is activated an icon R is displayed In the Routine mode you can perform the following operations Measure e Calibrate e Review store and transfer data e Choose the MTC temperature e Review and load methods e Enter sample sensor and user IDs e Start Rondolino readings and calibration e Perform the electrode test Note Switching between the Routine and Expert modes is protected by a PIN code The PIN code corresponds to that of the system settings Upon delivery the PIN code is set fo 000000 18 METTLER TOLEDO SevenMulti The system menu 4 The system menu 4 1 Menu structure of the system menu 1 Select Language Page 20 1 English 2 Deutsch 3 Francais 4 Espanol 5 Italiano 2 Set Time and Date 1 Set Time 1 24 Hour Format 2 12 Hour Format 2 Set Date 1 Set Date mm dd yy 2 Set Date dd mm yy Page 20
67. ion unit 7 4 2 Operation of the Resistivity menu If two expansion units are attached first ensure that the desired expansion unit is selected Press Mode and press Res in the menu that appears to select the resistivity mode Call up the Resistivity menu with Menu The operation of the Resistivity menu corresponds to that of the Conductivity menu except for items 1 Mea surement Setting and 5 Set Alarm Limits A detailed description can be found in Section 7 1 2 Operation of the Conductivity menu on pages 57 to 65 1 Measurement Setting 1 Select Reference Temperature You can select between the reference temperatures 20 C and 25 C In the measurement the resistivity of the sample is referenced to the selected temperature Select Temp Correction Method 1 Linear Correction The resistivity of a solution decreases with increasing temperature of the solution With most solutions an inverse linear relationship between resistivity and temperature is given In such cases select the linear cor rection method 1 Enter Temp Correction Coefficient The input window for the temperature correction coefficient O 10 96 C appears The measured resistivity is corrected and displayed using the following formula Cre Gr 1 CaCT Tre 100 96 whereas C resistivity measured at temperature T mS cm C resistivity mS cm displayed by the instrument calculated back to the reference temperature
68. ion unit The output voltage depends on the measurement range The following values are available for the mean output voltage at the analog output No Meanvalue Meas range 18 180 mV Meas range 180 1800 mV 1 20 uS cm 2 20 uS cm 20 200 uS cm 2 200 uS cm 20 200 uS cm 0 2 2 mS cm 3 2 mS cm 0 2 2 mS cm 2 20 mS cm 4 20mS cm 2 20 mS cm 20 200 mS cm 5 200 mS cm 20 200 mS cm 200 2000 mS cm 6 Whole Range Values see table below Whole Range The following voltages are provided at the analog output in this setting Measurement range Voltage range 1 uS cm 10 uS cm 0 300 mV 10 uS cm 100 uS cm 300 600 mV 100 uS cm 1 mS cm 600 900 mV mS cm 10 mS cm 900 1200 mV 10 mS cm 100 mS cm 1200 1500 mV 100 mS cm 1 S cm 1500 1800 mV 10 Conductivity Methods in Memory A total of 40 methods for all applications can be stored 1 Load a Stored Method from Memory A list of the names of stored measurement methods appears on the screen Select the desired method with the arrow keys Display the parameters of the selected method with Select Press Load to load the parameters for the subsequent measurements 64 METTLER TOLEDO SevenMulti The Conductivity expansion unit 2 Save Current Settings as a Method The current settings for the measurement are displayed Press the Save key The input window for entry of
69. is activated in SevenMulti readings can be performed automatically without any additional settings Rondolino sample changer setup with propeller stirrer Propeller stirrer incl cable Order No 51107019 Seven Rondolino Stirrer Driver incl y shaped cable Order No 51302827 male connector female connector female connector Standard TTL cable Order No 51190589 TTL communication module Order No 51302825 2 7 Connection of a computer via the USB communication module SevenMulti can be equipped with a USB communication module for data transfer to a computer The USB commu nication module includes a floppy disk with a driver which allows COM communication via the USB interface on the computer This is offered for programs which do not support USB communication e g MS Windows HyperTerminal This allows for example IDs to be input with the barcode reader RS232 and measured values to be transferred to the computer USB simultaneously You can find more information about the settings for the USB interface in chapter 4 System settings A detailed description for the installation of the software and the configuration of SevenMulti and the PC can be found on the Hompage of METTLER TOLEDO under www mt com LabX Note Instead of installing the software from the enclosed floppy disk you can download the actual driver from the internet See above 10 METTLER TOLEDO SevenMulti Installation 3 Opera
70. isposable cups for Rondolino 1400 pieces 101974 PowerShower 51108219 Barcode reader Heron G D130 21901297 Null modem adapter 9P M M 21900924 Power cord for barcode reader EU 21901313 Power cord for barcode reader UK 21901314 Power cord for barcode reader US 21901315 Power cord for barcode reader AUS 21901316 RS cable F 21901305 Power supply 5V 21901311 Printer RS P42 RS P42 RS232 cable 51302125 Analog cable to titrators 51302258 LabX direct pH 51302876 Guide to pH measurement 51300047 Guide to conductivity and dissolved oxygen 51724716 Guide to ion selective measurement 51300075 pH 4 01 buffer 30 packets at 20 mL each 51302069 pH 4 01 buffer 6 bottles at 250 mL each 51340058 pH 7 00 buffer 30 packets at 20 mL each 51302047 pH 7 00 buffer 6 bottles at 250 mL each 51340060 pH 9 21 buffer 30 packets at 20 mL each 51302070 pH 9 21 buffer 6 bottles at 250 mL each 51300194 pH 10 01 buffer 30 packets at 20 mL each 51302079 pH 10 01 buffer 6 bottles at 250 mL each 51340231 InLab9410 pH electrode temperature sensor refillable 52000118 InLab 412 laboratory pH electrode glass refillable 52000112 InLab9413 robust pH electrode PEEK shaft ATC 52000100 InLab 420 pH electrode with PTFE polished diaphragm 52000113 InLab 730 laboratory conductivity electrode 51302119 InLab 740 conductivity sensor for low conductivity 51340260 InLab 490 laboratory ISFET electrode 51302305 InLab 501 Redox electrode with platinum ring 52000129
71. l of the expansion unit on the left channel is always output at the analog ouput e This analog output does not supply voltage for the Conductivity and ISFET expansion units 1 5 Maintenance 1 5 1 Cleaning the SevenMulti The housing is made of ABS PC which could be damaged by certain organic solutions such as Toluene Xylene and methyl ethyl ketone Good laboratory conduct requires immediate wiping out of emptied spilled Safety precaution The housing and power supply may not be opened 6 METTLER TOLEDO SevenMulti SevenMulti 1 5 2 Cleaning the electrodes The SevenMulti monitors the condition of the attached pH electrodes ES Electrode in good condition for pH slope 95 to 105 96 offset 15 to 15 mV for ISFET slope 85 to 105 offset 15 to 15 mV Electrode must be cleaned for pH slope 90 to 94 96 offset 15 to 35 mV and 15 to 35 mV for ISFET slope 80 to 84 96 offset 15 to 35 mV and 15 to 35 mV Y Electrode is defective for pH slope 85 to 89 offset lt 35 mV and offset gt 35 mV for ISFET slope 75 to 79 offset lt 35 mV and offset gt 35 mV Y When cleaning always comply with the information contained in the operating instructions of the electrodes used The condition of the pH electrode can also be checked using the electrode test provided 1 5 3 Disposal In conformance with the European Directive 2002 96 EC on Waste Electrical and Electr
72. llowing formula Cscmpte Dem Dem Veamptei Vsampier Verbi Vsampiei D I Legend and setting options the same as with 3 Sample Addition see above METTLER TOLEDO SevenMulti 47 The pH lon and ISFET expansion units 4 Select Endpoint Formats 1 Auto With the automatic endpoint the selected stability criterion determines the end of an individual reading de pending on the behavior of the sensor used This ensures an easy quick and precise measurement Start measurement with Read The measurement ends automatically when the measured value is stable 2 Manual Start measurement with Read End the measurement by pressing Read again 3 Timed With the timed endpoint measurement is started with Read The measurement is ended automatically when the set time period expires You set this time period 3 s to 3600 s in the following input window Information on the display The following symbols appear on the display depending on the endpoint setting Preselected format Start of mea Signal stability Endpointed surement measurement Auto endpoint A iA A A Read gt iM Manual endpoint M A Read M M Read gt iM Timed endpoint T gt fT T Read iM 1 The actual endpoint format last column not the preselected is stored with the data 5 Set MTC Temperature manual temperature compensation If you are performing ion measurements and not usin
73. mV menu 39 mV reading 42 N Natural Sea Water Scale UNESCO 1966b 72 Non linear correction natural water 59 69 76 Notes 35 37 41 50 51 52 64 66 0 Offset 43 Offset Test 55 Output 21 P Pin assignments 6 PIN codes 23 Practical Salinity Scale UNESCO 1978 72 Printout format 22 Pt1000 5 Q Qualified Measurement only 24 R Reading conductivity 65 Reading pH values 55 Reading rel mV 43 Reading relative potential 43 Reading resistivity 76 Reading salinity 73 Reference Temperature 57 58 67 68 74 75 rel mV mode 38 Remote Control 18 Resistivity 75 78 Resolution 32 39 Review data 18 Rondolino Sample Changer 10 27 35 38 50 63 Routine Expert Mode 18 RS232 6 13 77 S Safety precautions 3 Salinity 72 Salinity Scale UNESCO 1966b 72 Sample Addition 47 Sample ID 12 Sample Subtraction 47 Screen 20 Segmented Method 31 45 Select Temp Correction Method 58 68 75 Select Temp Correction Method USP EP 58 Self test 18 Sensor ID 13 Sensor SN 13 Set expansion unit ID 23 Set TDS Factor 69 Softkeys 11 Special Standard 61 Stability Criterion 33 39 45 61 Symbols 4 System menu 19 T TDS 68 78 TDS Factor 69 TDS menu 68 Technical data 77 Temperature correction factors f25 82 The conductivity mode 57 The lon mode 44 The mV mode 38 The pH mode 29 The rel mv mode 38 The Resistivity mode 74 The Salinity mode 71 The TDS mode 67 Time 20 Time and Date 20
74. mn through the table Note If you enter a new sensor the previous calibration data is replaced by the theoretical values for this type of elec trode A new calibration must be performed because the calibration data is saved specifically for each sensor ID If you select a sensor ID from the list the specific calibration data is loaded from memory 3 3 3 Enter user ID Press ID and confirm the menu item 3 Enter User ID with Enter Enter the user ID with a maximum of 8 characters using the alphanumeric keys or select a user from the list Press the Save softkey to save the user ID and press Exit to exit the ID menu 3 3 4 Enter ID using a barcode reader A barcode reader can be attached to the RS232 interface to automate the input of IDs e g sample ID sensor ID Settings for the barcode reader are described in section 4 System settings If the barcode reader is activated in the measurement display the sample ID is automatically entered The Auto Se quential function must be deactivated beforehand Section 3 3 1 Enter Sample ID Note Up to 12 characters can be read in If a longer ID is read in with the barcode reader only the first 12 places are accepted METTLER TOLEDO SevenMulti 13 Installation 3 4 The Data menu 3 4 1 Menu structure of the Data menu 1 Store Transfer Current Reading Page 15 2 Review Transfer Current Calibration Page 15 3 Access Memory Functions Page 15 Review Transfer
75. n unit 5 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout Before entering a limit you can activate or deactivate the alarm for this limit Parameter Minimum Maximum Unit Salinity 0 00 80 00 ppt Temperature 30 0 130 0 C Cell Constant 0 000001 200 0 l em 7 3 3 Reading salinity The salinity can be derived from the conductivity of a sample Press Mode in the conductivity display Activate conversion into salinity with SAL Press Menu and select 1 Select Salinity Type Select salinity type and accept with Select The measurement is carried out as described in section 1 in the unit psu practical salinity unit or ppt parts per thousand Note If you change the conductivity sensor a calibration must be performed because every sensor has its own cell constant and the calculation of the salt content of the sample is based on the cell constant For calibration see sec tion 7 1 4 Calibrating a conductivity sensor Attach a suitable conductivity sensor to the Conductivity expansion unit f the conductivity sensor does not have a temperature sensor enter the sample temperature manually see Salinity Menu 4 Set MTC Temperature Place the conductivity sensor into the sample and press Read The salinity of
76. numeric characters for user IDs Capital letters can be used but special characters can not All IDs can also be entered using a barcode reader see Section 3 3 4 Enter ID using a barcode reader 3 3 1 Enter Sample ID Press ID and confirm the menu item 1 Enter Sample ID with Enter Enter the sample ID with max 12 characters using the alphanumeric keys Press the Save softkey to save the sample ID and press Exit to exit the ID menu 1 Auto Sequential On If you enter a purely numeric sample ID e g 123 or a sample ID that ends with numbers e g wa ter123 you can set it so that the sample ID is automatically incremented by 1 for each reading 2 Auto Sequential Off The sample ID is not automatically incremented 12 METTLER TOLEDO SevenMulti Installation 3 3 2 Enter Sensor ID Sensor SN Press ID select the menu item 2 Enter Sensor ID and confirm with Enter Enter the sensor ID using the alphanumeric keys using a maximum of 12 characters or select a sensor ID from the list Enter Sensor ID if required change to the entry box for Sensor SN with and store the entries with Save n the lon mode a table of possible electrode types appears blank CN Na se Ag CO NH3 SCN BF Cu NH lon Br F NO lon Ca H MO lon Cd2 NO lon Cl Kt Pb2 To select the corresponding electrode type move the cursor with the t and keys column by colu
77. o 2 Manual Dota Transfer to Memory 2 Manual 9 Activate Rondolino Sample Changer Page 35 3 Timed 1 Measurement 5 Set MTC Temperature Page 33 2 Calibration 10 pH Methods in Memory Page 36 1 Load a Stored pH Method from Memory 2 Save Current Settings as a Method METTLER TOLEDO SevenMulti 29 The pH lon and ISFET expansion units 6 1 2 Operation of the pH menu If two expansion units are attached first ensure that the desired expansion unit is selected Press Mode and press pH in the menu that appears to select the pH mode Call up the pH menu with Menu 1 Calibration Setting 1 Set Calibration Buffer 1 Select a Standard Buffer Group Select a predefined standard pH buffer group The following buffer groups are predefined Nr Buffer 1 Butter 2 Butter 3 Butter A Buffer5 Temp Designation 1 1 68 4 00 7 00 10 01 25 C METTLER TOLEDO US 2 2 00 4 01 7 00 9 21 11 00 25 C METTLER TOLEDO Europe 3 2 00 4 00 7 00 9 00 12 00 20 C Merck standard buffers 4 1 680 4 008 6 865 9 184 12 454 25 C DIN 19266 NIST 5 1 09 4 65 6 79 9 23 12 75 25 C DIN 19267 6 1 680 4 003 6 864 9 182 12 460 25 C JJG119 7 2 00 4 01 7 00 10 00 25 C Technical buffers 8 1 679 4 008 6 865 9 180 25 C JS28802 1 Auto buffer recognition On The SevenMulti features automatic calibration buffer recognition This allows you to calibrate in any order you like within a
78. o Interface NE f 3 Log to Memory and Interface 2 Calibration Settings Page 60 2 08 1 Set Calibration Standard 1 10 84 500 amp 1413 uS cm 12 88 mS cm 7 Select Data Transfer Mode Page 63 2 Saturated NaCl 1 Automatic Data Transfer 3 Enter Cell Constant during Calibration 1 Log to Memory 4 Enter your Special Standard 2 Log to Interface 2 Set Calibration Reminder 3 Log to Memory and Interface 1 Off 2 Manual Data Transfer to Memory 2 Remind by Interval Time i 8 Activate Rondolino Sample Changer Page 63 3 Select Endpoint Formats Page 61 ee ERR 2 Calibration 2 Manual 3 Timed 9 Salinity Methods in Memory Page 64 1 Load a Stored Method from Memory EE xc Des 2 Save Current Settings as a Method 5 Set Alarm Limits Page 73 1 Salinity Max Limit 2 Salinity Min Limit 3 Temperature Max Limit 4 Temperature Min Limit 5 Cell Constant Max Limit 6 Cell Constant Min Limit METTLER TOLEDO SevenMulti 71 The Conductivity expansion unit 7 3 2 Operation of the Salinity menu If two expansion units are attached first ensure that the desired expansion unit is selected Press Mode and press SAL in the menu that appears to select the salinity mode Call up the Salinity menu with Menu For practical reasons the salinity of a solution is derived from the salinity of seawater Two methods of calculating the salinity from the conductivity are supported The operation of the Salinity menu correspond
79. on the bottom line of the screen Data are stored The measurement data is saved in memory e Memory is full The data memory is full The measurement data was not stored To clear the memory see Data menu 3 5 Delete Measurement Data Methods Pressing Trans transmits the displayed data record to an attached computer or printer Switch back to measurement display with Exit or Read 2 Review Transfer Current Calibration Press Data select 2 Review Transfer Current Calibration and confirm with Enter Select in the Dual Channel menu the desired channel using 1 Left or 2 Right and press Enter to confirm The current calibration data of the sensor is displayed Pressing Trans transmits the displayed data record to an attached computer or printer 3 Access Memory Functions 1 Review Transfer Measurement Data It is possible to create overviews of the stored measurement data All measurement data Measurement data recorded as of a specific date Measurement data recorded by a specific user Measurement data recorded with a specific sample ID Measurement data recorded with a specific sensor ID Measurement data recorded with a specific method The last saved data record of the selection appears on the screen The number and total amount of selected readings are displayed on the bottom line METTLER TOLEDO SevenMulti 15 Installation Pressing the t keys brings you to the data record of the previous ne
80. onic Equip ment WEEE this device may not be disposed of in domestic waste This also applies to countries outside the EU per their specific requirements Please dispose of this product in accordance with local regulations at the collecting point specified for electrical and electronic equipment If you have any questions please contact the responsible authority or the distributor from which you purchased this device Should this device be passed on to other parties for private or professional use the content of this regulation must also be related Thank you for your contribution to environmental protection METTLER TOLEDO SevenMulti 7 Installation 2 Installation 2 1 Unpacking checking scope of delivery Unpack the instrument and check the scope of delivery with the accompanying shipping list 2 2 Mounting electrode arm The electrode arm can be used standalone or mounted to SevenMulti The base offers 3 different positions for mounting of the electrode arm J Mounting electrode arm as standalone Remove the cover from the central hole in the base D Place the electrode arm into the holder and secure the connection with the supplied mountingscrew Gi Save the cover in case you would like to mount the electrode arm in a different position at a later time Mounting electrode arm to SevenMulti The electrode arm can be fastened to SevenMulti on the left or right side Remove the cover
81. or input switch to the next character Enter Call up selected menu item Select Select selected menu parameter Save Accept selected parameter Exit Back to previous higher level menu To exit the menu press the Exit key until the measurement display appears or press Read Only in data menu Y Navigation within a data set 4 Change to next data set METTLER TOLEDO SevenMulti 11 Installation 3 2 Operation using the alphanumeric keypad The alphanumeric keypad allows you to access menu items directly Position 10 is accessed using the number O 3 2 1 Alphanumeric input Keys 2 through 9 may be assigned with several values including the letters shown depending on the input window which is active e f only numerical values are allowed in an input field e g time PIN code the keys are assigned the numbers shown e f both letters and numbers are allowed in an input field first the letters and then the number value can be en fered by pressing the keys repeatedly e With the key input can be deleted character by character from right to left Example Input UTA7 2 2x8 1x8 1x2 5x7 Note Only capital letters and numbers can be entered It is not possible to enter special characters 3 3 Entering IDs SevenMulti allows you to identify your readings with sample sensor and user IDs A maximum of 12 alphanumeric characters can be used for the identification of sample method and sensor IDs and a maximum of 8 alpha
82. re 30 0 130 0 C Calibration offset 60 0 60 0 mV Calibration slope 85 0 110 0 7 Timed Interval Readings In this menu you activate and deactivate series measurements and set the time interval between two successive measurements 1 On The input window for the time interval 3 s to 2400 s appears When the time interval is entered a menu appears for selection of the mode of measured data recording 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface 2 Off no series measurement 8 Select Data Transfer Mode 1 Automatic Data Transfer 1 Log to Memory The measured data is saved in the SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface 2 Manual Data Transfer to Memory Automatic measurement data transfer is deactivated If you would like to store the measured values after a measurement press Data see Section 3 4 2 Operation of the Data Menu 34 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion unit
83. red values after a measurement press Data see Section 3 4 2 Operation of the Data Menu 7 Activate Rondolino Sample Changer l Measurement If you want to start the measurement with the sample changer using the currently displayed settings Press Start The measurement with the sample changer starts If you want to change the sample IDs Press Edit The input window to enter the sample IDs of the first 5 Rondolino positions appears Enter the sample ID using the alphanumeric keypad or the barcode reader Change to the next Rondolino position using Up to 9 Rondolino positions can be entered The number of the entered sample IDs determines the number of samples to be measured Press Save to confirm the last entry A table with the data entered appears Press Start The measurement with the sample changer starts Notes e A METTLER TOLEDO titration stirrer can be connected using the Seven Rondolino Stirrer Driver accessories This allows fully automatic measurement with a high rate of repeatability e f you have selected log to interface the data is transferred after each individual measurement If you have selected log to memory the data is saved as in a normal measurement METTLER TOLEDO SevenMulti 4 The pH lon and ISFET expansion units 8 mV rel mV Methods in Memory A total of 40 methods for all applications can be stored 1 Load a Stored Method from Memory A list of the names of stored mea
84. rement Note Calibration is not possible in rel mV mode METTLER TOLEDO SevenMulti 43 The pH lon and ISFET expansion units 6 3 6 3 1 The lon mode Menu structure of the lon mode In addition to the ion mode the lon expansion unit also allows you to measure pH mV and rel mV Descriptions of the pH and mV rel mV menus are found in Sections 6 1 The pH mode and 6 2 The mV rel mV mode 1 Measurement Unit and Stability Criterion Page 45 1 Select Measurement Units 1 mmol L mol L ppm mg L 96 2 Select Stability Criterion 1 Fast 2 Normal 3 Strict 1 Set Calibration Standard 1 mmol L mol L ppm mg L 96 2 Select Calibration Mode 1 Segment Method 2 Linear Method 3 Set Calibration Reminder 1 Off 2 Remind by Interval Time o BON o BON 3 Incremental Methods 1 Known Addition 2 Known Subtraction 3 Sample Addition 4 Sample Subtraction 4 Select Endpoint Formats Page 48 1 Auto 2 Manual 3 Timed Page 46 5 Set MTC Temperature Page 48 6 Set Alarm Limits Page 48 1 lon Concentration Max Limit 2 lon Concentration Min Limit 3 Temperature Max Limit 4 Temperature Min Limit 5 Calibration Slope Max Limit 6 Calibration Slope Min Limit 7 Timed Interval Readings Page 49 1 On 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Off 8 Select Data Transfer Mode 1 Automatic Data Transfer 1 Log to Memory 2 Log to Inte
85. rface 3 Log to Memory and Interface Page 49 2 Manual Data Transfer to Memory 9 Activate Rondolino Sample Changer Page 50 1 Measurement 2 Calibration 10 lon Methods in Memory Page 51 1 Load a Stored Method from Memory 2 Save Current Settings as a Method METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 6 3 2 Operation of the lon menu If two expansion units are attached first ensure that the desired expansion unit is selected Press Mode and press lon in the menu that appears to select the ion mode Call up the lon menu with Menu Measurement Unit and Stability Criterion 1 Select Measurement Units In this menu you can define the unit mmol L mol L ppm mg L oder 96 for measurements and calibration Afterward you can change to mmol L and mol L units or ppm mg L and using the menu item 1 1 Mea surement setting Note If for example you wanted to change from mol L units to ppm you must first recalibrate otherwise an error message appears 2 Select Stability Criterion In this menu you can define the stability criterion of your measurement Stability criterion for fast The measured signal may not change by more than 0 3 mV in 4 seconds Stability criterion for normal The measured signal may not change by more than 0 08 mV in 8 seconds Stability criterion for strict The measured signal may not change by more than 0 03 mV in 12 seconds or by more than 0 08
86. s 9 Activate Rondolino Sample Changer 1 Measurement If you want to start the reading with the sample changer using the currently displayed settings Press Start The reading with the sample changer starts If you want to change the sample IDs Press Edit The input window to enter the sample IDs of the first 5 Rondolino positions appears Enter the sample ID using the alphanumeric keypad or the barcode reader Change to the input field of the next Rondolino position using Up to 9 Rondolino positions can be en tered The number of sample IDs entered determines the number of samples to be measured Press Save to confirm the last entry A table with the data entered appears Press Start The reading with the sample changer starts 2 Calibration The current buffer group is displayed To change the buffer group exit the Rondolino menu and select a new buffer group in the Calibration set ting menu Enter the number of the buffers and press Save to confirm Press Start After the last reading a table appears with the results of the calibration To assess the calibration display the calibration curve mV vs pH graphically using Graph e The calibration points are shown as crosses e n the segment method the calibration points are joined by straight lines e n the linear method the calibration curve is calculated as a linear regression Press Save to use the calibration for further measurements
87. s started with Read The measurement is ended automatically when the set time period expires You set this time period 3 s to 3600 s in the following input window Information on the display The following symbols appear in the display depending on the endpoint setting Preselected format Start of mea Signal stability Endpointed surement measurement 1 Auto endpoint A FA A A Read gt iM Manual endpoint M Read gt f M Read JM Timed endpoint T gt iT T Read gt iM D The actual endpoint format last column not the preselected is stored with the data 5 Set MTC Temperature manual temperature compensation If you are working without a temperature sensor during the pH measurement enter the temperature of the sample in this menu 30 C 130 C SevenMulti calculates the temperature adjusted electrode slope with this tempera ture and shows the temperature compensated pH value in the measurement display METTLER TOLEDO SevenMulti 33 The pH lon and ISFET expansion units 6 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout Before entering a limit you can activate or deactivate the alarm for this limit Parameter Minimum Maximum Unit pH value 2 000 20 000 pH Temperatu
88. s to that of the Conductivity menu except for item 1 Select Salinity Type and 5 Set Alarm Limits A detailed description can be found in Section 7 1 2 Operation of the Conductivity menu on pages 58 to 65 1 Select Salinity Type 1 Practical Salinity Scale UNESCO 1978 In the official definition the salinity Sosu of a sample in psu practical salinity unit is calculated using the fol lowing formula at standard atmospheric pressure 5 es 5 3 So Yan CE S oR j 0 14K T 15 do 0 0080 bo 0 0005 k 0 00162 a 0 1692 b 0 0056 Gaz 25 3851 b 0 0066 az 14 0941 bs 0 0375 a 7 0261 b 0 0636 d 2 7081 b 0 0144 R Csompie CT e p Cia T 32 4356 g KCI per 1000 g of solution 2 Natural Sea Water Scale UNESCO 1966b According to the older definition the salinity S of a sample in ppt parts per thousand is calculated using the following formula for a temperature of T 15 C and at standard atmospheric pressure Spp 0 08996 28 2929729 R 12 80832 R 10 67869 R 5 98624 Rt 1 32311 R5 whereas R Campie C With T 15 C C ampe Conductivity of sample C 42 914 mS cm Conductivity of Copenhagen Seawater Standard If the conductivity is not measured at 15 C the following applies for 10 C lt T lt 31 C Ry E Csempie T ICC R R 10 R R 1 T 15 96 7 72 0 R 37 3 R 0 63 0 21 R2Y T 15 72 METTLER TOLEDO SevenMulti The Conductivity expansio
89. see 1 Select a standard buffer group 2 Auto buffer recognition Off see 1 Select a standard buffer group 2 Select Calibration Mode 1 Segmented Method The segmented method is the most modern method ibi DINN for precise pH readings The calibration curve is made F pPH aere 7 up of line segments joining the individual calibration points rather than a linear regression through them This takes into account any non linear behavior of the electrode over a large pH range In the diagram the arat R segments a b c and d all have different slopes The offset defined as the potential at pH 7 is also differ ent for segments a b and d while that for segments b and c is the same This is because they both share the pH 7 buffer which is in fact the offset The segmented method is preferred for high precision readings 2 Linear Method With this method the calibration curve is determined via a linear regression line The linear method is preferred when samples with greatly varying pH values are to be compared Offset b c METTLER TOLEDO SevenMulti 31 The pH lon and ISFET expansion units 3 Set Calibration Reminder 1 Off no calibration reminder 2 Remind by Interval Time If the calibration reminder is active you are reminded to perform a new calibration after a specified amount of time has passed The reminder comes in the form of a message on the bottom line of the measurement displa
90. sion unit 2 4 Installing removing communication module Safety precaution Switch off the instrument and disconnect it from the mains network before installing or removing a communica tion module Installing communication module Remove the cover from the slot on the back of the instrument Save the cover nsert the communication module into the slot and fasten it with two screws Removing communication module Loosen both screws and pull out the communication module f you do not wish to connect another communication module replace the cover 2 5 Connecting to the mains network Safety precaution Operate SevenMulti with the supplied power supply only Ensure that the power supply is designed for the mains voltage available where you are If this is not the case contact your METTLER TOLEDO representative Insert the plug of the power supply into the mains connection socket DC on the back of SevenMulti Connect the power supply to an electrical outlet METTLER TOLEDO SevenMulti 9 Installation 2 6 Connection of additional instruments to the TTL communication module If SevenMulti is fitted with a TTL communication module additional instruments such as the Rondolino sample changer can be attached SevenMulti has a control protocol for communication with the Rondolino sample changer If operation with the sample changer
91. st entry A table with the data entered appears Press Start The reading with the sample changer starts 2 Calibration The current standards are displayed To change the buffer group exit the Rondolino menu and redefine the standards in the Calibration setting menu Enter the number of standards and press Save to confirm the entry Press Start After the last reading a table appears showing the results of the calibration To assess the calibration press Graph to display the calibration curve mV vs ion concentration graphically The calibration points are shown as crosses In the segment method the calibration points are joined by straight lines In the linear method the calibration curve is calculated as a linear regression To use the calibration for further readings press Save To discard the calibration press Cancel Notes e A METTLER TOLEDO titration stirrer can be connected using the Seven Rondolino Stirrer Driver accessories This allows fully automatic measurement with a high rate of repeatability e For readings If you have selected log to interface the data is transferred after each individual measurement If you have selected save data the data is saved as in a normal measurement 50 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 10 lon Methods in Memory A total of 40 methods for all applications can be stored 1 Load a Stored Method from Memory A list of the n
92. surement methods appears on the screen Select the desired method with the arrow keys Display the parameters of the selected method with Select Press Load to load the parameters for the subsequent measurements 2 Save Current Settings as a Method The current settings for the measurement are displayed Press the Save key The input window for entry of the name of the measurement method appears When the name has been entered press Save again to store the measurement method A method ID cannot be used twice It must first be deleted before it can be used again Otherwise the Method ID already exists error message appears 9 rel mV Offset Setting Note You can only set this in the rel mV menu 1 Enter an Offset Value The input window for the offset appears Enter offset in mV and save with Save 2 Test a Reference Sample You are directed to place the electrode into the reference solution Once the electrode is placed in the reference solution start measuring with Meas When the measurement display freezes save the measured value with Save 6 2 3 Measuring absolute potential mV value Calling up mV mode Press Mode in the measurement display Then press mV in the following menu The measurement display is now in mV Performing measurement Place the electrode into the sample and press Read Depending on the set endpoint wait until the measurement display stops moving or
93. t of a standard solution of a substance different from the measured ion and which forms a precipitate with low solubility with the measured ion is then added This leads to a measurable decrease in the measured ion concentration The potential is measured again and the concentration of the sample calcu lated using the following formula Csampie Csrp Var Vsampie Vscmpie Van 10 85 Legends and setting options as with 1 Known Addition 46 METTLER TOLEDO SevenMulti The pH lon and ISFET expansion units 3 Sample Addition With the sample addition the potential of a highly diluted solution with a known volume and concentration is measured A small known volume increment of a sample is added and the potential is measured again The concentration of the sample is calculated using the following formula Csamplel Coq C Vsampie1 F Vsto1 Vsampie1 S poses E Vsto1 Vsampie1 whereas Csampe1 desired concentration of the sample determined via sample addition Csrpi known concentration of the solution before addition of the first sample increment Van known volume of the solution before addition of the first sample increment Vsanpel known volume of the sample before addition of the first sample increment Ac change of the mV signal after addition of the first sample increment Up to 4 sample increments of the same volume can be added for one reading This yields 4 results which should theoretically be the same
94. t digit Limits of error 0 5 of measured value Sensor input Input impedance 23 1020 Input offset current lt 1 1072A Other modes pH mV Temperature C Measurement range 2 000 20 000 1999 9 1999 9 30 0 130 0 Resolution 0 001 0 01 0 1 0 1 0 1 Limits of errors 0 002 x 0 1 01 Relative mV yes Temperature compensation ATC 5 0 C 130 0 C MTC 30 0 C 130 0 C Sensor input Input impedance 23210 Input offset current lt 1 1072A 78 METTLER TOLEDO SevenMulti Appendix 8 1 5 Technical data of ISFET expansion unit Measurement range pH 0 000 14 000 Meas range temperature 5 0 C 105 0 C Resolution 0 001 pH Limits of errors 0 002 pH METTLER TOLEDO SevenMulti 79 Appendix 8 2 Accessories Designation Order No pH expansion unit 51302821 Conductivity expansion unit 51302822 lon expansion unit 51302823 ISFET expansion unit 51302824 Blank expansion unit 51302874 TTL communication module 51302825 Standard TTL cable 51190589 USB communication module without cable 51302826 Power supply EU 51302870 Power supply US 51302871 Power supply UK 51302872 Power supply JP 51302873 SevenMulti protective cover 51302819 Electrode arm complete 51302820 Rondolino sample changer complete 51108500 Compact stirrer incl 2 propeller stirrers 51109150 Seven Rondolino Stirrer Driver connection kit 51302827 D
95. t window for verification of the login password appears Reenter password Note If entry was not successful the password must be reentered and verification must be performed again Set system settings PIN code Enter a numeric PIN code max 6 places The input window for verification of the PIN code appears Reenter PIN code Note If entry was not successful the PIN code must be reentered and verification must be performed again The PIN code for the system settings is also valid for switching between the Expert and Routine modes Upon delivery the PIN code is set to 000000 Set PIN code for deletion Enter a numeric PIN code max 6 places The input window for verification of the PIN code appears Reenter PIN code Note If entry was not successful the PIN code must be reentered and verification must be performed again Upon delivery the PIN code is set to 000000 METTLER TOLEDO SevenMulti 23 The system menu 8 Qualified Measurement only Activating this menu point blocks SevenMulti automatically for measurements if a predefined time interval for cali bration is exceeded Only calibration can then be done with the current sensor ID until the next successful calibration has been carried out 1 On If during calibration the calibration reminder goes off the meter will be blocked for measurements until the next successful calibration has been carried out 2 Off Measurement is still possi
96. terface The measured data is transferred to an attached computer or printer via the interface 62 METTLER TOLEDO SevenMulti The Conductivity expansion unit 2 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface Off no series measurement 7 Select Data Transfer Mode l Automatic Data Transfer 1 Log to Memory The measured data is saved the in SevenMulti memory 2 Log to Interface The measured data is transferred to an attached computer or printer via the interface 3 Log to Memory and Interface The measurement data is saved in SevenMulti and transferred to an attached computer or printer via the interface Manual Data Transfer to Memory Automatic measurement data transfer is deactivated If you would like to store the measured values after a reading press Data see Section 3 4 2 Operation of the Data Menu 8 Activate Rondolino Sample Changer l Measurement If you want to start the measurement with the sample changer using the currently displayed settings Press Start The measurement with the sample changer starts If you want to change the sample IDs Press Edit The input window to enter the sample IDs of the first 5 Rondolino positions appears Enter the sample ID using the alphanumeric keypad or the barcode reader Change to the input window of the next Rondolino position using
97. the sample is shown on the display METTLER TOLEDO SevenMulti 73 The Conductivity expansion unit 7 4 The Resistivity mode 7 4 1 Menu structure of the Resistivity mode 1 Measurement Setting Page 75 1 Select Reference Temperature 2 Select Temp Correction Method 1 Linear Correction 2 Non linear Correction Natural Water 3 Off 2 Calibration Settings Page 60 1 Set Calibration Standard 1 10 84 500 amp 1413 uS cm 12 88 mS cm 2 Saturated NaCl 3 Enter Cell Constant during Calibration 4 Enter your Special Standard 2 Set Calibration Reminder 1 Off 2 Remind by Interval Time 3 Select Endpoint Formats Page 61 1 Auto 2 Manual 3 Timed 4 Set MTC Temperature Page 62 5 Set Alarm Limits Page 76 1 Resistivity Max Limit 2 Resistivity Min Limit 3 Temperature Max Limit 4 Temperature Min Limit 5 Cell Constant Max Limit 6 Cell Constant Min Limit 6 Timed Interval Readings Page 62 1 On 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Off 7 Select Data Transfer Mode Page 63 1 Automatic Data Transfer 1 Log to Memory 2 Log to Interface 3 Log to Memory and Interface 2 Manual Data Transfer to Memory 8 Activate Rondolino Sample Changer Page 63 1 Measurement 2 Calibration 9 Resistivity Methods in Memory Page 64 1 Load a Stored Method from Memory 2 Save Current Settings as a Method METTLER TOLEDO SevenMulti The Conductivity expans
98. the sensor used This ensures an easy quick and precise measurement Start measurement with Read The measurement ends automatically when the measured value is stable Manual Start measurement with Read End the measurement by pressing Read again Timed With the timed endpoint measurement is started with Read The measurement is ended automatically when the set time period expires You set this time period 3 s to 3600 s in the following input window METTLER TOLEDO SevenMulti 39 The pH lon and ISFET expansion units Information on the display The following symbols appear in the display depending on the endpoint setting Preselected format Start of mea Signal stability Endpointed surement measurement 1 Auto endpoint A A A A Read gt iM Manual endpoint M ag Read gt A M Read iM Timed endpoint T z gt iT T Read gt iM 1 The actual endpoint format last column not the preselected is stored with the data 3 Set MTC Temperature manual temperature compensation If you are working without a temperature sensor during the mV rel mV measurement enter the temperature of the sample in this menu 30 C 130 C 5 Set Alarm Limits In this menu you can define the upper and lower limits for measurement or calibration data If a limit is exceeded or undershot a warning is output to the screen This message also appears on the GLP printout Before ent
99. tion of SevenMulti 3 1 Operation with softkeys SevenMulti has 4 softkeys whose functions are assigned differently depending on the application and the expan sion unit used The current assignment is shown on the screen to the left of the softkeys Working with 2 expansion units left or right selected The softkeys are assigned as follows in the basic configuration of SevenMulti measurement display with 2 expan sion units Sys Activate System menu Menu Activate menu of expansion unit Mode Select measurement method e g pH or mV Dual Switch to dual display i e the measured value display for an expansion unit is limited to the left or right half of the screen Working with 2 expansion units simultaneously The softkeys are assigned as follows in the basic configuration of SevenMulti measurement display with 2 expan sion units Sys Activate System menu Menu Activate Dual Channel menu Left Select left expansion unit i e the display for the left expansion unit is expanded to fill the screen and settings can be made for the left expansion unit Right Select right expansion unit i e the display for the right expansion unit is expanded to fill the screen and settings can be made for the right expansion unit Softkeys in the expansion unit menus The most important assignments of the softkeys in the menu are as follows ty Select previous next menu item For input delete the last character gt F
100. ty ion ISFET mV Rel mV TDS Salinity Resistivity with Select Enter the method ID or select the method to be deleted from the list using the arrow keys and press Delete to delete Confirm or cancel the action when the message This will delete all your selected data appears with Yes or Exit accordingly Note Only methods not currently in use are available in the list for deletion An active method cannot be deleted 4 Delete Incremental Meas Data deletes all incremental measurement data from memory 5 Empty Memory removes all measurement data all calibration data and methods from memory METTLER TOLEDO SevenMulti 17 Installation 3 5 Thei menu 3 5 1 Help information SevenMulti features extensive context sensitive help information Press QD Help information for the current operation step appears on the display for the selected topics Press Ed A general information menu of the system is available 3 5 2 Instrument Self test This menu item starts the self test routine You are requested to press each key one by one in any order The self test result is displayed after a few seconds If errors are reported Contact METTLER TOLEDO Service Note You have to finish pressing all keys within two minutes otherwise Self test failed appears and you will have to repeat the procedure 3 5 3 Remote Control On Off You can control SevenMulti via commands from PC software The precondit
101. um Maximum Unit TDS 0 0001 1000 g L Temperature 30 0 130 0 C Cell Constant 0 000001 200 0 l em METTLER TOLEDO SevenMulti 69 The Conductivity expansion unit 7 2 3 Measuring total dissolved solids TDS A conductivity measured value can be converted to a total dissolved solids value Press Mode in the conductivity display Activate the conversion into the total dissolved solids TDS value with TDS Press Menu select 1 3 Set TDS Factor and confirm with Enter Enter TDS factor and store with Save Note If you change the conductivity sensor a calibration must be performed because every sensor has its own cell constant and the calculation of the TDS value is based on the cell constant For calibration see Section 7 1 4 Calibrating a conductivity sensor Attach a suitable conductivity sensor to the Conductivity expansion unit f the conductivity sensor does not have a temperature sensor enter the sample temperature manually see TDS Menu 4 Set MTC Temperature Place the conductivity sensor into the sample and press Read The TDS value of the sample is shown on the display 70 METTLER TOLEDO SevenMulti The Conductivity expansion unit 7 3 The Salinity mode 7 3 1 Menu structure of the Salinity mode 1 Measurement Setting Page 72 6 Timed Interval Readings Page 62 1 Select Salinity Type 1 On 1 Practical Salinity Scale 1978 1 Log to Memory 2 Natural Sea Water Scale 1966 2 Log t
102. wn on the display The unit of the measurement result depends on the parameters set under 2 Calibration setting METTLER TOLEDO SevenMulti 51 The pH lon and ISFET expansion units 6 3 4 Calibrating an ion sensitive electrode Preparing for calibration Have a set of calibration standards with known ion concentrations on hand A maximum of 9 different calibration standards is possible After entering of a new sensor ID and sensor SN select the electrode type Enter parameters of the calibration standards in the lon menu under 1 2 Calibration Setting Performing calibration Place electrode into the first calibration standard and press Cal to start calibrating CAL 1 on the display indicates that the first calibration point is being measured If a standard other than the selected one is to be used it can still be changed using the lit key Depending on the endpoint format selected the value is shown when the measured value is stable Place electrode into the second calibration standard and press Cal to start calibrating again CAL 2 on the display indicates that the second calibration point is being measured Depending on the endpoint format selected the value is shown when the measured value is stable Repeat this procedure for further calibration standards End the calibration with End after measurement of the last calibration standard A table with the calibration results appears on the display
103. xt reading Press Trans and select if the currently shown data record or if all filtered data should be transferred to the connected PC or printer Review Transfer Calibration Data You can display the calibration data saved under a sensor ID for the following sensor types pH sensor ion sensor conductivity sensor ISFET sensor When a sensor ID is selected the stored calibration data is displayed Pressing the t keys brings you to the previous next calibration Press Trans and select if the currently shown data record or if all filtered data should be transferred to the connected PC or printer Review Transfer Method Data You can display the stored method data for the different measurement modes pH conductvity ion mV Rel mV TDS Salinity Resistivity ISFET pH ISFET mV ISFET rel mV After selecting a measuring mode you can select 1 Enter Method ID or 2 Select Method ID from List to call up the corresponding stored methods After selection of the method the corresponding method parameters are shown Pressing Trans transmits the displayed data record to an attached computer or printer and ends the proce dure Review Transfer Current Setting The current instrument settings are displayed Pressing the Trans key transmits the displayed data record to an attached computer or printer Review Transfer Incremental Meas Data You can display the incremental measurement data Press Trans
104. y Activating this item leads to an input window into which you enter the time interval 1 to 1000 h 2 Electrode test This menu allows you to check the drift the slope the offset and the response time of your pH electrode without performing an adjustment Select two buffers from the current buffer group Place the electrode in the first buffer solution and press Meas When the measured value is stable the first read ing is automatically ended and the message Place electrode in buffer 2 appears on the display Place the electrode in the second buffer solution and press Meas The reading is automatically ended and the sensor ID the results for the drift mV min the slope 96 the offset mV and the response time s are dis played with the message OK critical Measurement Criteria The measurement will endpoint once the measurement signal changes less than 0 5 mV in 10 seconds For calculation of the response time the time sec is taken from the start of the second measurement until 98 of the difference between the reading for the two buffers is reached i e mV1 0 98 mV2 mV1 For the drift determination a measurment is taken after 60 seconds from the start of the measurement in the second buffer and again after a further 30 seconds The drift is then the difference between the 2 readings in mV 30s Limits Drift is OK if less than 3 mV in 30 seconds Slope is OK from 90 to 105 of

1. SevenMulti - METTLER TOLEDO

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