SevenMulti
 Operating Instructions
SevenMult
METTLER TOLEDO
Contents
Content
1. SevenMulti™ 3
1.1 Introduction 3
1.2 Safety precautions 3
1.3 Description of the instrument 4
1.3.1 Key field 4
1.3.2 Symbols in the measurement display 4
1.3.3 Connections 5
1.3.4 Pin assignments 6
1.4 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
2.1 Unpacking/checking scope of delivery 8
2.2 Mounting electrode arm 8
2.3 Installing/removing expansion units 8
2.4 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 11
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 1D 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 informafion 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 menu 25
5.2 Operation of the Dual Channel menu 26
5.3 Measuring with two expansion units 28
METTLER TOLEDO SevenMulii™
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
6.1.2 Operation of the pH menu 30
6.1.3 Measuring a pH value 36
6.1.4 Calibrating a pH electrode 36
6.2 The mV/rel. mV mode 38
0.2.1 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
0.3.3 Measuring ion concentration 51
6.3.4 Calibrating an ion-sensifive 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
A The conductivity mode 57
7.1.1 Menu structure of the conductivity mode 57
7.1.2 Operation of the Conductivity menu 58
7.1.3 Measuring conductivity 65
7.1.4 Calibrating a conductivity sensor 65
72 The TDS mode 67
7.2.1 Menu structure of the TDS mode 67
12.2 Operation of the TDS menu 68
12.3 Measuring total dissolved solids (TDS) 70
7.3 The Salinity mode 71
7.3.1 Menu structure of the Salinity mode 71
1.3.2 Operation of the Salinity menu 72
7.3.3 Reading salinity 73
7.4 The Resistivity mode 74
7.4.1 Menu structure of the Resistivity mode 74
7.4.2 Operation of the Resistivity menu 75
74.3 Reading resistivity 76
8. Appendix 77
8.1 Technical data 77
8.1.1 Technical data of the SevenMulti™ 77
8.1.2 Technical data of pH expansion unit 77
8.1.3 Technical data of Conductivity expansion unif 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 Temperalure-correction factors fo; 82
85 Conductivity standards 82
8.0 USP / EP tables 83
Index 84
METTLER TOLEDO SevenMulfi™
SevenMulfi™
1. SevenMulti™
1.1 Introduction
SevenMulti™ — Modular expansion at any time
An ingenious instrument concept based on precise elecirochemical measuring technique combined with latest op-
tions for your challenges in the laboraiory.
e Extend the instrument's possibilities with durable plug-in expansion units at any time. With no effort, make it a
dual channel instrument.
* 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 fight (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 satefy 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,
direct sunlight,
atmospheric humidity greater than 80%,
corrosive gas atmosphere,
temperatures below 5 °C and above 40 °C,
powerful electric or magnetic fields!
METTLER TOLEDO SevenMulii™ 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
О) (i) Opens the i menu, provides context-sensitive
A Y | O) 9 help
A 1 O) Starts calibration
| O) Read) Starts/ends reading
200 |
© © © © 1 Softkey assignment (variable)
OOO 2 The current softkey assignment is shown to the
(1) 65 O) © left on the screen
3 Alphanumeric key field
3
1.3.2 Symbols in the measurement display
In addition fo the measured value, additional symbols and messages appear on the screen, which allow you to
check the measurement process for each expansion unit.
] 2 3 4 5
Selected method
7 Measured value with unit
03-03-2003
0 15:05
Endpoint
17 METHOD! 6 (A dutomatic, /m manual, /7 fimed
7 9 ATC or MTC — automatic or manual temperature
compensation
16 25.0 °С 8 10 Information line, e.g. for the calibration reminder
15 193 9 11 Timed Interval Reading active
14 2.00, 4.01, … 12 Condition of the aftached electrode (pH)
13 Af 5 Electrode in good condition
10 5 Electrode requires cleaning
19 11 5 Electrode is defective
1 User name 13 Sensor ID
2 Routine mode active 14 Calibration standards
3 GLP printout active/ 15 Sample ID
data transfer to printer/PC active 16 Measured/specified temperature
4 Interface settings: LabX 17 Selected channel
5 Date and time
4 METTLER TOLEDO SevenMulfi™
SevenMulfi™
1.3.3 Connections
Connections on the SevenMult|™
DC Mains connection socket
1 7 = Y Data RS2 32 interface
= Analog Analog output of electrode potential for pH/
(lf lon expansion unit
PE © | 1 2 connections for expansion units
2 I connection for communicafion modules
The expansion units can be combined together as you
wish, with one exception: It is nof possible to have 2
Conductivity expansion units.
Connections on the pH and lon expansion unit
Sensor Electrode connection socket
Ref Reference elecfrode connecfion sockef
O) © ATC Connection for temperature sensor
NTC 30 kQ
Pt1000 Connection for temperature sensor PTI 000
Connections on the Conductivity expansion unit
Sensor Electrode connection socket
Titrator Titration unit output (analog signal)
Sensor O Titrator O)
Connections on the ISFET expansion unit
-—o
N Sensor Electrode connection socket
METTLER TOLEDO SevenMulii™ 5
SevenMulti™
1.3.4 Pin assignments
RS232, TTL: Socket 9 Pin, D-Sub, female Pin assignment R$232
2437! Pni NC Pin6 NC
Hs Pn2 TxD (ou) Pn7 NC
© | OKI | o Pin3 RxD (in) Pin8 NC
97! Pin4 № Pin9 №
86 Pin5 RSGND
Pin assignment TTL
Pin 1 In 1 Pine 0u4
Pin 2 In 2 Pin 7 Ground
Pin3 Out] Pin8 Ground
Pin4 Out2 Pn9 +5 Volt
Pinb NC
USB Pin assignment USB
Pin 1 VCC
2] Pn2 D-
Pin3 D+
USB
) | o Pin4 Ground
( ©
с
O
о)
(
o
Ds
1.4 Analog output
For the pH and lon expansion units the analog output of the SevenMulti™ supplies a voltage proportional fo the
displayed measured value (pH, mV, rel. mV and ion concentration). The polarity of the output corresponds fo the
polarity af the measurement elecirode. The voliage af the analog output is nof femperafure-compensated.
e |f a pH or lon expansion unit is operated on both channels, the measurement signal 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 SevenMulfi™
SevenMulfi™
1.5.2 Cleaning the electrodes
The SevenMulti™ monitors the condition of the attached pH electrodes.
7 —Elecirode in good condition
for pH: slope 95 fo 105 %, offset - 15 to + 15 MV
for ISFET: slope 85 to 105 %, offset - 15 to + 15 MY
5 Electrode must be cleaned
for pH: slope 90 to 94 %, offset - 15 to - 35 MV and + 15 to + 35 MV
for ISFET: slope 80 fo 84 %, offset - 15 to - 35 mV and + 15 to + 35 MY
7 Electrode is defective
for pH: slope 85 fo 89 %, offset < - 35 mV and offset > + 3b mV
for ISFET: slope 75 fo 79 %, offset < - 35 mV and offset > + 3b mV
— 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 Electronic Equip-
ment (WEEE) this device may not be disposed of in domestic waste.
This also applies fo 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 vou have any questions, please contact Ihe 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
his regulation must also be related.
Thank you for your contribution to environmental protection.
METTLER TOLEDO SevenMulii™ 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.
Mounting electrode arm as standalone
— Remove the cover from the central hole in the base.
— Place the electrode arm info the holder and secure the connection with the supplied
mountingscrew.
— Save the cover in case you would like to mount the electrode arm in a different
position af a later time.
Mounting electrode arm to SevenMultI™
The electrode arm can be fastened fo SevenMulti™ on the left or right side.
— Remove the cover from fwo holes in the base.
— Mount the base to the instrument with the supplied mounting screw so that the free
end of the base poinfs foward fhe 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 rofary tensioning knob: turn the knob anticlockwise.
— To fighten the rofary 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 SevenMulfi™
Installation
Installing expansion unit
— Remove the cover from the desired slot (left or right).
— Save the cover.
— Insert the expansion unif into the slot until it engages.
Removing expansion unit
— Press the coloured buiton on the expansion unit and remove it trom the instrument.
— If you do not wish to insert another expansion unit into this slot, replace the cover
or use a blank expansion 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.
— Insert the communication module into the slot and Tasten it with Two screws.
Removing communication module
— Loosen both screws and pull ouf the communication module.
— If 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 info the mains connection socket (DC) on the back of SevenMulti™,
— Connect the power supply to an electrical outlet.
METTLER TOLEDO SevenMulii™ 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 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 Sfirrer Driver
incl y-shaped cable (Order No. 51302827)
male connector
female connecfor
female connecfor
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 fo 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
lo the computer (USB) simultaneously. You can find more information about Ihe 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 SevenMulfi™
Installation
3. Operation 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 fo 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 SevenMulfi™ 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 fo the left or
right halt of the screen
Working with 2 expansion units (simultaneously)
The softkeys are assigned as follows in the basic configuration of SevenMulfi™ measurement display, with 2 expan-
sion unifs:
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 fo 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:
t + Select previous/next menu item
+ For input: delete the last character
> For input: switch to the next character
Enter Call up selected menu item
Select Select selected menu parameter
Save Accept selected parameter
Exit Back fo 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 dafa set
+ Change fo next data set
METTLER TOLEDO SevenMulii™ 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 О.
3.2.1 Alphanumeric input
Keys 2 through 9 may be assigned with several values, including the lefters 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-
tered by pressing the keys repeatedly.
o With he « Key, inpuf can be deleted character-by-character from right fo left.
Example: Input UTA7 =2x8 1x8 1x2 5x7
Note: Only capital letters and numbers can be entered. If is not possible fo 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 alphanumeric 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 fhe menu ifem 1. Enter Sample ID with Enter.
— Enter the sample ID with max. 12 characters using the alphanumeric keys.
— Press the Save softkey fo save the sample ID and press Exit fo exif 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-
ler123), you can set it so thaf the sample ID is automatically incremented by 1 for each reading
2. <Auto Sequentlal> Off
The sample ID is not automatically incremented.
12 METTLER TOLEDO SevenMulfi™
Installation
3.3.2 Enter Sensor 1D/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-1D, if required change to the entry box for Sensor-SN with + and store the entries with Save.
— In the lon mode a fable of possible electrode types appears:
blank CN- Na+ S?-
Ag+ CO, NH, SCN-
BF, Cu?+ NH,* lon*
Br F NO, lon?-
Ca? H+ NO, lon-
Cd? Г NO, lon”
СГ K+ Pb?+ 7
— To select the corresponding electrode type, move the cursor with the t and 4 keys column by column through
the table.
Note: If you enfer a new sensor, fhe previous calibrafion dafa is replaced by fhe theorefical values for this type of elec-
rode. 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 fhe menu ifem 3. Enter User ID wiih 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 Ihe ID menu.
3.3.4 Enter ID using a barcode reader
A barcode reader can be aftached 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 SevenMulii™ 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 Callbration Page 15]
3. AccessiMemory Function Page 15)
1. Review/Transfer Measurement Data
1. Display All
2. Search by Date
. Search by User
. Search by Sample ID
. Search by Sensor ID
. Search by Method Type
w
о CU A
2. Review/ Transfer Calibration Data
1. pH
2. lon
3. Conductivity
4. ISFET
. Review/Transfer Method Data
. Review/ Transfer Current Sefting
. Review/ Transfer Incremental Meas. Data
MN a A W
. Delete Measurement Data/ Methods
1. 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 Calibrafion Data
1. pH
2. Conductivity
3. lon
4. |SFET
3. Delete Methods
. Delete Incremental Meas. Data
5. Empty Memory
O UI Ra ON —
Fa
14
METTLER TOLEDO SevenMulfi™
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 Datd
Method Datd
Instrument settings
You can fransmit 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 hem again from
memory.
. Store/ Transfer Current Reading
— If you wanf fo manually save a reading, press Data when the reading has ended (measurement display freez-
es)
— In this menu open 1. Store/Transfer Current Reading and confirm with Save.
The measurement data is stored.
Note the message on the bottom line of the screen:
* Data are stored: The measurement data is saved in memory.
* 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 aftached computer or printer.
Switch back to measurement display with Exit or Read.
. Revlew/ Transfer Current Calibratlo
— Press Data, select 2. Review/Transfer Current Calibratlon 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 aftached computer or printer.
3. AccessiMemory 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 dafa recorded by a specific user
Measurement dafa 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 botfom line.
METTLER TOLEDO SevenMulii™ 15
Installation
— Pressing the + 4 keys brings you to the data record of the previous/next 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
* lon sensor
e conductivity sensor
e |SFET sensor
When a sensor ID is selected, the stored calibration data is displayed.
— Pressing the + ¥ keys brings you to the previous/next calibration.
— Press Trans and select if the currently shown data record or if all tiltered data should be fransterred to the
connected PC or printer.
Review/Transfer Method Data
You can display the stored method data for the different measurement modes:
pH
conductivity
ion
my
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 dafa 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 and select if the currently shown data record or if all filtered data should be transferred to the
connected PC or printer.
16
METTLER TOLEDO SevenMulfi™
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 dafa recorded on a specific date
Measurement dafa 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 + 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, conductivity, 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 fo 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 dafa, all calibrafion data and methods trom memory.
METTLER TOLEDO SevenMulii™ 17
Installation
3.5 Theimenu
3.5.1 Help information
SevenMulti™ features extensive context-sensitive help information.
— Press (1.
Help informafion for fhe current operafion sfep appears on the display for fhe selecíed fopics.
— Press EJ.
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 fo 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 fo finish pressing all keys within two minutes, otherwise "Self fest failed!" appears, and you will have
fo repeat the procedure.
3.5.3 Remote Control On/Off
You can control SevenMulti™ via commands from PC software. The precondition is that you select LabX in the
system settings. You can block the control on the meter itselt with Remote Control On. Only the start and end of
measurement and a calibration is possible trom the meter. All other changes to seifings have fo 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
seftings are not possible. If routine mode is activated an icon [R] is displayed.
In the Routine mode you can perform the following operations:
e 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
» Start Rondolino readings and calibration
e Perform the electrode fest
Note: Swilfching between the Routine and Expert modes is protected by a PIN code. The PIN code corresponds fo
that of the system settings. Upon delivery, the PIN code is set to 000000.
18 METTLER TOLEDO SevenMulfi™
The system menu
4. The system menu
4.1 Menu structure of the system menu
П. Select Language INP age 20]
1. English
2. Deutsch
3. Francais
4. Espanol
5. lialiano
. Set Time and Date
1. Set Time
1. 24 Hour Format
2. 12 Hour Format
2. Sel Date
1.5ei Date: mm-dd-yy
2.5ei Date: dd-mm-yy
3. Screen Setting ENP age 20]
1. Screen Contrast
age
2. Screen Saver
1. Off
2. On
4. Interface Settings ENP age 21)
1. Ouipui/Inpui
1. Outpui
1. Prinfer
2. BalanceLink/Hperterminal
2. Input
2. LabX
[5. Printout Format INP age 22]
1. GLP
2. Standard
3. Short
l6. Instrument/Expansion Unit 1D Page 23)
1. Set Instrument 1D
2. Sel Expansion Unit 1D
[7. Login/System settings PIN Codes BP age 231
1. Set Instrument Login PIN code
2. Set system settings PIN code
3. Sel PIN code for deletion
18. Qualified Measurement only EP age 241
1.0n
2. Off
METTLER TOLEDO SevenMulii™
19
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 managers PIN code. Upon delivery, the PIN code is sel to 000000. Please
change the lab managers PIN code fo prevent unauthorised access.
Ÿ. Select Longuoge ЛОЛ
The following languages are available for the system: German, English, French, Spanish and Italian.
— Select the desired language and confirm with Select.
1. Set Time
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 = affer 12 noon
2. Set Date
You can select between two display tormats:
mm-dd-yy (month - day - year): E.g.: 09-27-03
dd-mm-yy (day - month - year): E.g.: 27-09-03
3. Screen Setting
1. Screen Contrast
You can sef the contrast of the screen to one of 32 levels with the + ¥ keys.
2. 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 SevenMulfi™
The system menu
nterface 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 rafes. The specific parameters for the prinfer are set under 1.1. Output
and for the barcode reader under 1.2. Input.
Note: If you want to operate the SevenMulii™ using a computer soffware program, you must select LabX and set the
specific parameters. With this setting there is no automatic printout through the inferface 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, 9600
e Data bit 1,8
e Stop bif 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
® Stop bit 1,2
® Parity no, odd, even
e Handshake no, Xon/xoff
2. Input
e Baud rate 1200, 2400, 4800, 9600
e Data bit 7,8
® Stop bit 1,2
® Parity no, odd, even
e Handshake no, Xon/xoff
2. LabX
e Baud rate 1200, 2400, 4800, 9600
e Data bil 7,8
o Stop bit 1,2
e Poaritv no, odd, even
oe Handshake no, Xon/xoff
— Use y + to select the input field and select the desired setting using Change.
— Press Save to save your settings.
METTLER TOLEDO SevenMulii™ 21
The system menu
This menu item allows you to define the desired format for your printout.
If you select GLP Format, you can enfer a header for your printout.
1. GLP 2. Standard
Example for GLP Format (Measurement in pH mode) Example for Standard Format (Measurement in pH
mode)
Channel L
Format: GLP dor 25-JUL-2005
Date: 25-JUL-2005 MU |
Time: 09:31 Time: 10:56
Sensor ID: INLABA13 Endpoint: Automatic
ATC/MTC MTC
Sensor SN: 5051234 |
Sample ID: WATER
Last Cal.: 24-JUL-2005 |
CH 11:25 Result: 6.99/pH
Cal. time - mV: 0.2mV
Instrument ID: ANA]
Instrument SN: 123456789
EXp.unit 1D: PHI
Temperature: 25.0%
Exp.unit SN: 230006p
User: MEIER 3. Shor
Method: ГАРТ Example for Short Format (Measurement in pH mode)
Endpoint: Automatic
ATC/MTC MTC Channel L |
Time int.: 120s 6.997 pH 25.0% MTC
Automation: Pos.:3
Sample ID: WATER
Result: 6.99/pH
mv: 0.2mV
Temperature: 23.0%
Alarm: Max pH
Min Temp
Signature:
22 METTLER TOLEDO SevenMulfi™
The system menu
[6. Tnsfrument/Expan sion ити! ——
1.
Set Instrument ID
The current instrument ID is displayed in the input field of the inpuf window.
— Enter an alphanumeric instrument ID (max. 6 places).
The entered instrument ID remains infact when the instrument is swifched 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 unif in the leff or right slof reappears.
— Repeat steps for the second expansion unit or end procedure with EXIT.
(7. Login/System seffings/PIN codes —_
1.
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 fo 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 input window for verification of the login password appears.
— Reenter password.
Note: If entry was not successful, the password must be reenfered 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 SevenMulii™ 23
The system menu
[8.JQualified Measurement only J ——
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 fhe calibrafion reminder goes off, the mefer will be blocked for measurements unfil fhe
next successtul calibration has been carried out.
2. Off
Measurement is still possible.
24 METTLER TOLEDO SevenMulfi™
The Dual menu
5. The Dual menu
5.1 Menu structure of the Dual Channel menu
N. Select Endpoini Formais Page 26]
1. Auto
2. Manual
3. Timed
2. Set MTC Temperature ENP age 26]
13. Timed Interval Readings Page 26]
1. On
1. Log to Memory
2. Log fo Interface
3. Log fo Memory and Interface
2. Off
. Select Data Transfer Mode age
1. Automatic Dafa Transfer
1. Log to Memory
2. Log fo Inferface
3. Log fo Memory and Interface
2. Manual Data Transfer fo Memory
15. Activate Rondolino Sample Changer Page 271
1. Measurement
[6. Dual Channel Method In Memory Раде 28]
1. Load a Siored Method from Memory
2. Save Current Settings as a Method
METTLER TOLEDO SevenMulii™
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 fo 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. SelectiEndpolnt 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.
— 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 compensaii o JS
If you are working without a temperature sensor during Ihe measurement, enter Ihe temperature of Ihe sample in this
тепи (- 30 °С... 130 °С).
3. Timedinterval Readings
In fhis menu, you activaïe and deactivate series measurements and set the time interval between two successive
measurements.
1. On
The input window for the time interval (3 s fo 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 dafa is saved in SevenMulti™ and transferred to an attached computer or printer via the
interface.
2. Off — no series measurement,
26 METTLER TOLEDO SevenMulfi™
The Dual menu
4. SelectData 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 altached 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
measurement, press Data (see Section 3.4.2 Operation of the Data-Menu).
9. ActivateRondolino Sample Change
1.
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 fo 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
o A METTLER TOLEDO fitration stirrer can be connected using the Seven/Rondolino Stirrer Driver accessories. This
allows fully-automatic measurement with a high degree of repeatability.
e |f you have selected log to inferface, the data is transferred to the printer after each individual measurement. If
you have selected log fo memory, the data will be saved as in a normal measurement.
METTLER TOLEDO SevenMulii™ 27
The Dual menu
6. Dual Channel Method In Memor
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, ofherwise
an error message appears Please save single channel method first. A dual channel method is the combination of
two single channel methods.
1. Load a Stored Dual Channel Method from Memory
A list of the names of sfored 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 lo store the methods as a dual channel method.
9.3 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 for both expansion units can be entered using the Dual Menu as described in the current
chapter.
Settings that are specific fo 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 SevenMulfi™
The pH/lon and ISFET expansion units
6. The pH/lon and ISFET expansion units
6.1 The pH mode
6.1.1 Menu structure of the pH mode
I1. Calibration Setting Page 300
1. Set Calibration Buffer
1. Select a Standard Buffer Group
2. Set a Customized Buffer Group
2. Select Calibrafion Mode
1. Segment method
2. Linear method
3. Sel Calibration Reminder
1. Off
2. Remind by Interval Time
. Electrode test age
13. Select Resolution and Stability Criterion Раде 32]
1. Select Display Resolution
1. XX
2. X.XX
3. X XXX
2. Select Stability Criterion
1. Fast
2. Normal
3. Strict
4. Select Endpolni Formais Page 33)
1. Auto
2. Manual
3. Timed
5. Set MTC Temperature Раде 33]
6. Set Alarm LImits Page
-] © 1 > & N =
. pH Max. Limit
. pH Min. Limit
. temperature Max. Limit
. temperature Min. Limit
. Calibration Offset Max. Limit
. Calibration Offset Min. Limit
. Calibration Slope Max. Limit
8.
Calibration Slope Min. Limit
2.
I7. Timed Interval Readings Page 34]
1.
On
1. Log to Memory
2. Log fo Inferface
3. Log to Memory and Interface
Off
5, Select Data Transfer Mode Page
1. Automatic Data Transfer
2.
1. Log to Memory
2. Log fo Inferface
3. Log lo Memory and Interface
Manual Dafa Transfer to Memory
9. Activate Rondolino Sample Changer Page 35:
1.
2.
Measurement
Calibration
(10. pH Methods In Memory NP age 36]
1.
2.
Load a Stored pH Method from Memory
Save Current Settings as a Method
METTLER TOLEDO SevenMulii™
29
The pH/lon and ISFET expansion units
6.1.2 Operation of the pH menu
— If two expansion unifs 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.
IT CalTbration Seffing
1. Set Callbration Buffer
1. Select a Standard Buffer Group
— Select a predefined standard pH buffer group.
The following buffer groups are predefined.
Nr. | Buffer 1 Buffer2 Buffer 3 Buffer4 Buffer 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 JJG 1189
7. 12.00 4.01 7.00 10.00 — 25°C Technical buffers
8. |1.679 4.008 6.865 9.180 — 25°C JISZ 8802
1. Auto buffer recognition On
The SevenMulti™ features automatic calibration-buffer recognition. This allows you to calibrate in any
order you like within a buffer group.
Note: If the measured mV value for the first calibration point deviates by more than 60 mV (approx.
+ | 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 fable tor 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 SevenMulfi™
The pH/lon and ISFET expansion unifs
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 |Buffer3 |Buffer4 |Bufferb
oR LIN IH
— Press Change fo access the fable.
— You can navigate within the table using the + and + keys and delete Ihe value using +.
— Press End to finish edifing the table and Save fo store the values.
1. Auto buffer recognition On
(see 1. Select a standard buffer group)
2. Auto buffer recognition Off
(see 1. Select a standard buffer group)
2. Select Calibratlon Mode
1. Segmented Method
The segmented method is the most modern method MV 4 ore
for precise pH readings. The calibration curve is made a PH = Siope.
up of line segments joining the individual calibration
points rather than a linear regression through them. 0
This takes into account any non-linear behavior of the | ** ©
electrode over a large pH range. In the diagram, the ore! °
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 7.00 pH
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 calibrafion curve is determined via a linear regression line.
The linear method is preferred when samples with greatly varying pH values are fo be compared.
METTLER TOLEDO SevenMulii™ 31
The pH/lon and ISFET expansion units
3. Set Callbratlon Reminder
1. Off — no calibration reminder
2. Remind by Interval Time
If the calibration reminder is acfive, you are reminded fo perform a new calibrafion after a specified amount
of fime has passed. The reminder comes in the form of a message on the botfom line of the measurement
display.
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 oftset 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 resulis for the drift (mV/min), the slope (%), the oftset (mV) and the response time (s) are dis-
played with the message OK/crifical.
Measurement Criterla:
— The measurement will endpoint once the measurement signal changes less than 0.5 mV in 10 seconds.
— For calculafion 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 affer a further 30 seconds. The driff 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 the theoretical slope.
Offset is OK if in the range of + 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.
В. SelecfiResolution and Stability Criterion —
1. Select Display Resolution
In this menu, you select the resolution fo 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 SevenMulfi™
The pH/lon and ISFET expansion unifs
Select Stabllity Criterion
In this menu you can define the stability criterion of your measurement
Stabllity criterion for fast
The measured signal may not change by more than 0.6 mV in 4 seconds.
Stabllity criterion for normal
The measured signal may not change by more than 0.1 mV in 6 seconds.
Stabllity 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.
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
îne seï 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 endpoinf seffing :
Preselected format Start of mea- Signal stablilty | Endpolnted
surement measurement !)
Auto endpoint A fA A
A Read — IM
Manual endpolnt M 7 Read > Mi
MM Read — fi
Timed endpoint T Is > A
T Read — IM
1) The actual endpoint format (last column) not the preselected is stored with the data.
5. Set MTC Temperafure (manual femperafure compensat Ee
If you are working without a temperature sensor during the pH measurement, enter Ihe temperature of Ihe sample in
this menu (-30 °C ... 130 °C). SevenMulti™ calculates the temperature-adjusted electrode slope with this fempera-
ture and shows the temperature-compensated pH value in the measurement display.
METTLER TOLEDO SevenMulii™ 33
The pH/lon and ISFET expansion units
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
Temperature —30.0 130.0 °C
Calibration offset —60.0 60.0 mV
Calibration slope 85.0 110.0 %
/. Timed nterval 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 fime inferval is enfered, a menu appears tor selection of the mode otf measured dafa recording:
1. Log to Memory
The measured data is saved in the SevenMulti™ memory.
2. Log to Interface
The measured data is transterred to an attached computer or printer via the interface.
3. Log to Memory and Interface
The measurement dafa is saved in SevenMulti™ and transferred to an attached computer or printer via the
interface.
2. Off — no series measurement
8, SelectData 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 dafa is saved in SevenMulti™ and transferred to an attached computer or printer via the
interface.
2. Manual Data Transfer to Memory
Automatic measurement-datla transter is deactivated. If you would like fo store the measured values after a
measurement, press Data (see Section 3.4.2 Operation of the Data-Menu).
34 METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion unifs
9. ActivatefRondolino Sample Change
1.
Measurement
If you want fo start the reading with the sample changer using the currently displayed settings:
— Press Start. The reading with the sample changer starts.
If you wanf fo 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 fo 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 contirm the last entry. A table with the data entered appears.
Press Start. The reading with the sample changer starts.
Calibration
— The current buffer group is displayed.
— To change the buffer group, exif the Rondolino menu and select a new buffer group in the Calibration set
ling menu.
Enfer the number of the buffers and press Save fo confirm.
Press Start. Affer 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.
* |n the segment method, the calibration points are joined by siraight lines.
e In Ihe linear method, the calibration curve is calculated as a linear regression.
Press Save to use the calibration for further measurements.
— Press Cancel fo discard the calibration.
Notes
o A METTLER TOLEDO fitration stirrer can be connected using the Seven/Rondolino Stirrer Driver accessories. This
allows fully-automatic measurement with a high rate of repeatability.
® For measurements: If you have selected log fo interface, the data is transferred after each individual reading. If
you have selected log fo memory, the data is saved as in a normal reading.
METTLER TOLEDO SevenMulii™ 35
The pH/lon and ISFET expansion units
TO. pH Methods In Memo ——
A total of 40 methods for all applications can be stored.
1. Load a Stored Method from Memory
A list of the names of sfored 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 Ihe name has been entered, press Save again to store Ihe 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 6.1.2 Operation of the pH menu).
— Altach a suitable pH electrode to the pH expansion unit.
— If the pH electrode does not have a temperature sensor, enfer the sample temperature manually
(see pH menu 5. Set MTC Temperature).
— Place the pH elecirode in the sample and press Read.
The pH value of the sample is shown on fhe display.
— In the aufomatic or fimed 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 callbration
— 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.
— In the pH menu under 1.2. Select Callbration Mode, select the calibration mode.
36 METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion unifs
Callbrating
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 îfhe [ 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.
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 lasf calibrafion buffer.
A table with the calibration results appears in the display.
Checking callbration
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 lo use the calibration and make an adjustment for subsequent measurements.
Press Cancel to discard ihe 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 the measured mV value for calibration points 2 through n deviates by more than 60 mV (approx. + 1 pH)
from fhe theorefical value of the calibrafion buffer during an n-poinf calibrafion, the Slope out of range warning
appears.
If for an n-point calibration the same calibration buffer is used twice or two calibration buffers whose mV values
differ less than 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-poinf calibrafion using a sensor ID with which you have already performed a mulfi-poiní
calibration, only the offsef value is changed. The slope of the previous multi-point calibrafion is retained.
METTLER TOLEDO SevenMulii™ 37
The pH/lon and ISFET expansion units
6.2 The mV/rel. mV mode
6.2.1 Menu structure of the mV/rel. mV mode
Il. Select Resolution and Stabllity Criterion Раде 39]
1. Select Display Resolution 1. Automatic Data Transfer
1. X 1. Log to Memory
2. X.X 2. Log lo Interface
2. Select Stability Criterion 3. Log fo Memory and Interface
1. Fast 2. Manual Data Transfer fo Memory
2. Normal
3. Strict 7. ActivateRondolIno Sample Changer Page 4H
1. Measurement
12. Select Endpoint Formats Page 39)
1. Auto 18. mV/rel. mV Methods In Memory Page 42)
> Manual 1. Load a Siored Method from Memory
3 Timed 2. Save Current Settings as a Method
В: Set MTC Temperature IEP ge 40] 9-16. mV Offset Setting age 42]
1. Enfer an Offset Value
. Set mV/rel. mV Alarm Limits age
1. mV Max. Limit
2. mV Min. Limit
3. Temperature Max. Limit
2. Test a Reference Sample
4. Temperature Min. Limit
15. Timed Inferval Readings NP age 40]
1. Оп
1. Log to Memory
2. Log fo Inferface
3. Log to Memory and Interface
2. Off
1.) You can only set this in the rel. mV menu.
38 METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion unifs
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 andiStabllity Criterion
1.
Select Display Resolution
In this menu, you select the resolution fo 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
Stabllity criterion for fast
The measured signal may not change by more than 0.6 mV in 4 seconds.
Stabllity criterion for normal
The measured signal may not change by more than 0.1 mV in 6 seconds.
Stablilty criterlon 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. SelectiEndpolnt 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.
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 fo 3600 s) in the following input window.
METTLER TOLEDO SevenMulii™ 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
Auto endpoint A fA A
A Read — M
Manual endpoint | Mi {7 Read © Mi
М Read —> /М
Timed endpolnt T Is > A
T Read — M
12 The actual endpoint format (last column) not the preselected is stored with the data.
13. Set MTC Temperafure (manual femperafure compensafion) Ee
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).
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 enfering 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
9. [Imedinterval Readings
In fhis menu, you activaïe and deactivate series measurements and set the time interval between two successive
measurements.
1. On
The input window for the time interval (3 s fo 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
40 METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion unifs
6. SelectData 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 altached 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
measurement, press Data (see Section 3.4.2 Operation of the Data-Menu).
. Actlvate Rondollno Sample Change
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 ne enfered sample IDs defermines the number of samples fo 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
o A METTLER TOLEDO fitration 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 lo interface, he 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 SevenMulii™ 4]
The pH/lon and ISFET expansion units
8. mV7rel. mV Mefhods In Memory нЕ
A total of 40 methods for all applications can be stored.
1. Load a Stored Method from Memory
A list of the names of sfored 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 measurement are displayed.
— Press the Save key.
The input window for entry of the name of the measurement method appears.
— When Ihe name has been entered, press Save again to store Ihe 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.
. rel. mM set Seftin
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 fo 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 unfil the measurement display stops moving or 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 SevenMulfi™
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 unfil the measurement display freezes.
Press Save to accept the offset.
Press EXit fo 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 info the sample and press Read.
The relative potential af the elecirode is displayed in mV in the display.
Depending on the sef endpoint, waif until the measurement display treezes or press Read to complete the mea-
surement.
— Press Read again to start a new measurement.
Note: Calibration is not possible in rel. mV mode.
METTLER TOLEDO SevenMulii™ 43
The pH/lon and ISFET expansion units
6.3 The lon mode
6.3.1 Menu structure of the lon mode
In addition to the ion mode, the lon expansion unit also allows you fo measure pH, mV and rel. mV. Descriptions oft
the pH and mV/rel. mV menus are found in Sections 6.1 The pH mode and 6.2. The mV/rel. mV mode.
M. Measurement Unit and Stability Criterion Page 451
1. Select Measurement Units
1. mmol/L
. mol/L
. ppm
. mg/L
. %
2. Select Stability Criterion
1. Fast
2. Normal
3. Strict
G1 SW N
. Callbration Setting age
1. Set Calibration Standard
1. mmol/L
. mol/L
. ppm
. mg/L
. %
2. Select Calibration Mode
1. Segment Method
2. Linear Method
3. Sef Calibration Reminder
1. Off
2. Remind by Interval Time
G1 SW N
3. Incremental Methods Page 46
1. Known Addition
2. Known Subtraction
3. Sample Addition
4. Sample Subtraction
М. Select Endpoint Formats Page 48
1. Aufo
2. Manual
3. Timed
[5. Set MTC Temperature Page 48]
. Set Alarm Limits age
1. lon Concentrafion 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 491
1. On
1. Log to Memory
2. Log 10 Interface
3. Log to Memory and Interface
2. Off
8. Select Data Transfer Mode
1. Automatic Data Transter
1. Log to Memory
2. Log fo Inferface
3. Log to Memory and Interface
2. Manual Data Transier to Memory
9. Activate Rondolino Sample Changer Page 501
1. Measurement
2. Calibration
N10. lon Methods In Memory Page 5
1. Load a Stored Method from Memory
2. Save Current Settings as a Method
44
METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion units
6.3.2 Operation of the lon menu
— If two expansion unifs are attached, first ensure that the desired expansion unit is selected.
— Press Mode and press Ion in the menu that appears fo select the ion mode.
— Call up the lon menu with Menu.
tabllity Criterion
1.
Select Measurement Unlts
In this menu you can detine the unit (mmol/L, mol/L, ppm, mg/L oder %) 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. Меа-
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.
Select Stabllity Criterion
In this menu you can define the stability criterion of your measurement
Stabllity 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.
Stabllity criterion for strict
The measured signal may not change by more than 0.03 mV in 12 seconds or by more than 0.08 mV in
26 seconds
allbration Setting
1.
Set Calibratlon Standard
You can define the calibration standards here:
— Select the unit and press Enter fo access the table tor entering temperature values and ion concentrations.
— Enter values using the alphanumeric keypad, use + fo navigate within the table and « to delete.
— Press Save to end the editing the table and accept the values.
Select Callbration 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 af 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 SevenMulii™ 45
The pH/lon and ISFET expansion unifs
3.
Set Calibration Reminder
1. Off — no calibration reminder
2. Remind by Interval Time
If the calibrafion reminder is active, you are reminded to perform a new calibration affer a specitied amount
of fime has passed. The reminder comes in the form of a message on the Бойот line of the measurement
display.
Activating this item leads to an input window, info which you enter the fime interval (1 to 1000 h).
3 .Incremental Mefhods
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.
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:
Csample = (Gsm + Vero) / ((V sample + Vp) - 10 485 — Vsample)
whereas
Csampie = desired concentration of sample in the selected unit U, e.g. ppm
Corn = known concentration of the standard (U)
Ven = known volume of the standard (mL)
Усатре = 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)
Known Subtraction
For the known subiraction, the potential of a sample with a known volume is measured. A small, known
volume (increment) 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 fo a measurable decrease in
the measured ion concentration. The potential is measured again and the concenirafion of the sample calcu-
lated using the following formula:
Csample = (Стр - Vso) / (Veample —(Vsampie + Veo) 10 AES)
Legends and sefting options as with 1. Known Addition.
46
METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion unifs
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:
Csample1 = Corp ` (ССУбатрет + VsTp1 /V sample1 ) - 104F 8 — VsTp1/Vsampie1 )
whereas
Csampier = desired concentration of î$ne sample, determined via sample addition
CsTp1 = Known concentration of the solution before addition of the first sample increment
Vsip = known volume of the solution before addition of the first sample increment
Vsampier = known volume of the sample before addition of the first sample increment
Ag = change of the mV signal after addition of the first sample increment
Up 10 4 sample increments of the same volume can be added tor one reading. This yields 4 results, which
should theoretically be the same. 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:
Сетро = (Сато: Vero + Csample1 - Vsample1) / Vero] + V sample)
Vern2 = Veni + Vsample1
AE2 = change of the mV signal after addition of the second sample increment.
The third and fourth sample additions are pertormed 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(Samplel) volume of the first sample increment or the firsf thinning in mL
V(Sample2) volume of the second sample increment or the second thinning in mL
V(Sample3) volume of the third sample incremenf or fhe fhird fhinning in mL
V(Sample4) volume of the fourth sample increment or the fourth thinning in mL
Parameter enfry 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 then added. The electrode responds to the standard, but not to the sample
lo be determined. The potential is measured again and the concentration of the sample calculated using the
following formula:
Csample1 = Cs - (VsTp1/V sample 1 a (Veample1 + Vsto1)/V sample1) - 104€ 1/8)
Legend and setting options the same as with 3. Sample Addition, see above.
METTLER TOLEDO SevenMulii™ 47
The pH/lon and ISFET expansion unifs
4. SelectiEndpoint Formats
1. Auto
With те 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 fhe display, depending on the endpoinf setiing:
Preselected format | Start of mea- Signal stability | Endpolnted
surement measurement ))
Auto endpoint A (А A
А Read — М
Manual endpoint | M /7 Read > M
М Read — IM
Timed endpoint T Ia > A
T Read — MM
1) The actual endpoint format (last column) not the preselected is stored with the data.
(5. Set MTC Temperature (manual temperature compensati oO Ee
If you are performing ion measurements and nof using a femperafure sensor, enfer the femperafure of the sample
(-30 °C ... 130 °C) in this menu. SevenMulti™ uses this temperature fo calculate the correct value of the electrode
slope for fnis femperafure and shows fhe femperafure-compensated ion value on the measurement display.
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 SevenMulfi™
The pH/lon and ISFET expansion unifs
Before enfering a limif, you can acfivafe or deactivafe the alarm for this limif.
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
1.00е-09 9.99e+09 mg/L
0.001 999.9 %
Temperature —30.0 130.0 °C
Calibration Slope 85.0 110.0 %
/. Timedinterval Readings
In fhis menu, you activaïe and deactivate series measurements and set the time interval between two successive
measurements.
1. On
The input window for the time interval (3 s fo 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
6. SelectData 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 transterred to an attached computer or printer via the interface.
3. Log to Memory and Interface
The measurement dafa 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 SevenMulii™ 49
The pH/lon and ISFET expansion units
9. ActivatefRondolino Sample Change
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 fo 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 last entry. A table with the data entered appears.
— Press Start. The reading with the sample changer starts.
2. Callbration
— The current standards are displayed.
— To change the buffer group, exit the Rondolino menu and redefine the standards in the Calibration setting
menu.
Enfer the number of standards and press Save to confirm the entry.
Press Start. After Ihe last reading a table appears showing the results of the calibration.
— To assess the calibration, press Graph to display the calibration curve (MY vs. lon 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 fitration 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 fo interface, the dafa is fransferred after each individual measurement. If
you have selected save data, Те data is saved as in a normal measurement.
50 METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion units
TO. Ton Methods in Memo ———
A Total of 40 methods for all applications can be stored.
1. Load a Stored Method from Memory
A list of the names of sfored 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 enfered, press Save again fo 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
* To ensure precise ion concentration measurements, perform a calibration before each series of measurements (see
Section 6.3.2 Operation of the lon menu).
* Temperature dependencies cannot be programmed for the reference solufions. 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 fo the lon expansion unit.
— If the electrode does nof have a temperature sensor, set the MTC temperature (see lon menu 5. Set MTC Tem-
perature) or use a separate P1000 or NTC 30 kQ temperature sensor.
— Place the electrode in the sample and press Read.
The ion concentration of the sample is shown on the display.
The unit of the measurement result depends on the parameters set under 2. Calibration setting.
METTLER TOLEDO SevenMulii™ 51
The pH/lon and ISFET expansion units
6.3.4 Calibrating an lon-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 Ion menu under 1.2. Calibratlon 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 It] 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 fo 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 tor 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.
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 fo disgard the calibration.
Notes
® [or 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 H+, 59.16 mV/pF for For —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 refained.
o |f he same solufion is used Twice for an n-poinf calibrafion, the warning Wrong standard appears for the second
measurement.
e |f ¡ne 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 SevenMulfi™
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
4. Sample Subtraction
— Press Start if you want to use the current parameters for your measurement.
— You are requested fo place the electrode info the first solution. Start the reading with Meas. The measurement
display appears until the first reading is complete.
— You are then directed fo 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.
— If 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.
— If you wanf fo use an existing incremental method, press Load. The existing incremental methods in the data-
base will be displayed.
— Press Load fo select a method. Press Start fo 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 fo place the electrode into the second solution.
Add the specified volume of sample solution fo the calibration standard and mix the solution.
— Place elecirode info the solution and press Meas..
The measurement starts automatically.
When the measurement is complete, you will be directed to place the elecirode 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 fo a computer.
METTLER TOLEDO SevenMulii™ 53
The pH/lon and ISFET expansion unifs
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
П. Calibration Setting NP age 30]
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. Sef Calibration Reminder
1. Off
2. Remind by Interval Time
2. Offset Test Page
13. Select Resolution and Stability Criterion Раде 32]
1. Select Display Resolution
1. XX
2. X.XX
3. X. XXX
2. Select Stability Criterion
1. Fast
2. Normal
3. Strict
М. Select Endpoint Formats Page 33)
1. Aufo
2. Manual
3. Timed
15. Set MTC Temperature Page 33)
. Set Alarm Limits age
“ O U A WwW N =
. pH Max. Limit
. pH Min. Limit
. Temperature Max. Limit
. Temperature Min. Limit
. Calibration Offset Max. Limit
. Calibration Offset Min. Limif
. Calibration Slope Max. Limit
8.
Calibration Slope Min. Limit
1/7. Timed Interval Readings
1.
2.
On
1. Log to Memory
2. Log fo Interface
3. Log lo Memory and Interface
Off
8. Select Data Transfer Mode Page
1. Automatic Data Transfer
2.
1. Log to Memory
2. Log fo Interface
3. Log lo Memory and Interface
Manual Dafa Transfer to Memory
19. Activate Rondolino Sample Changer Page 35
1.
2.
Measurement
Calibration
ПО. ISFET Methods In Memory Page 36)
1.
2.
Load a Stored Method from Memory
save Current Settings as a Method
04
METTLER TOLEDO SevenMulfi™
The pH/lon and ISFET expansion unifs
6.4.2 Operation of the ISFET menu
— If two expansion unifs 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 info the calibraione buffer of pH-7.0 and start the offset measurement with Meas..
The offset of the electrode is automatically measured and adjusted.
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 oufput fo the screen. This message also appears on the GLP printout.
Before enfering a limit, you can activate or deactivate the alarm for this limit.
Parameter Minimum Maximum Unit
pH value 0.000 14.000 pH
Temperature —30.0 130.0 °C
Calibration offset —00.0 60.0 mV
Calibration slope 75.0 110.0 %
6.4.3 Measuring with the ISFET expansion unit
The ISFET expansion unif 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 SevenMulii™ 55
The pH/lon and ISFET expansion units
Preparing for calibration
— Have a set of calibration buffers on hand.
Af 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 callbration
— Place the electrode in the first calibration buffer and press Cal fo start calibrating.
CAL 1 on the display indicates that the first calibration point is being measured.
If a standard other than the selected one ls to be used, it can still be changed using the [tl 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 tormat 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 callbration
— 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 tor subsequent measurements.
— Press Cancel fo disgard the calibration.
56 METTLER TOLEDO SevenMulfi™
The Conductivity expansion unit
7. The Conductivity expansion unit
In addition fo conductivity measurement, the conductivity expansion unit allows the measurement of TDS, salinity
and resistivity. The menus for these measurement types are described in the tollowing.
7.1 The conductivity mode
7.1.1 Menu structure of the conductivity mode
1. Measurement Setting Page 58] [6. Timed Interval Readings Page 62)
1. Select Reference Temperature 1. On
2. Select Temp. Correction Method/USP/EP 1. Log io 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 . Select Data Transfer Node age
6. EP Mode (purified water) 1. Automatic Data Transfer
3. Select Measurement Units 1. Log fo Memory
1. Auto Range pS/cm, mS/cm 2. Log to Interface
2. XXX E-X Sim 3. Log to Memory and Interface
2. Manual Data Transfer to Memory
[2. Calibration Settings Page 601
1. Set Calibration Standard 18. Activate Rondolino Sample Changer Раде 63]
1. 10, 84, 500 & 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 ENP age 64]
2. Sef Calibration Reminder 1. 20 uS/cm (middle point)
1. Off 2. 200 uYcm (middle point)
2. Remind by Interval Time 3. 2 mS/cm (middle point)
BB. 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 641
4. Set MTC Temperature Page 62 1. Load a Stored Method from Memory
2. Save Current Settings as a Method
9. Sef Alarm Limits Page €
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 TOLEDO SevenMulii™ 57
The Conductivity expansion unit
7.1.2 Operation of the Conductivity menu
If fwo 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.
ll
=
. Measurement Seffin
Select Reference Temperature
You can select between the reference temperatures 20 *C and 25 °C. The conductivity of the sample is refer-
enced fo the selected temperature during measurement.
2. 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 behween conductivity and temperature is given. In such cases, select the linear correction
method.
1. Enter Temp. Correction Coefficlent
The input window for the temperature-correction coefficient (O — 10 % / °C) appears.
The measured conductivity is corrected and displayed using the following formula:
Grret = 61/ (1 + (aT — Tre))/ 100 %)
whereas
G; = conductivity measured at temperature T (mS/cm)
Gre = conductivity (mS/cm) displayed by the instrument, calculated back to the reference temperature Tp;
ao = linear temperature correction coefficient (%/°C); a = O: no temperature correction
T = measured temperature (°C)
Try = Reference temperature (20 °C or 25 °C)
2. Determine Temp. Correction Coefficient
To determine the a coefficient, the sample has fo 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 a 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 1,5 for the measured temperature (see fable in appen-
dix) and thus corrected to the reference temperature of 25 °C:
Gros = Gy y fs
If another reference temperature is to be used, e.g. 20 °C, the conductivity corrected to 25 °C is divided by
1.116 (see f,; for 20.0 °C)
Broo = (Gy +15) / 1.116
Note: Conductivity measurements of natural water can only be performed af temperatures ranging from
0 °C fo 36 °C. Otherwise, the warning Temp. out of nLF correction range appears.
3. Off
If you swifch off femperafure correction, the conducfivity value af the actual femperafure is displayed
(a = 0%/°C).
4. USP Mode
In USP mode, SevenMulii™ fests whether 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 fest.
If you have more stringent requirements for “purified water” than the USP, you can use the USP factor (10 %
fo 100 %) fo take these info account.
Example: At 15 °C, the water may not exceed a conductivity of 1 uS/cm, in order to fulfill the USP require-
ments In the tirst step. A warning appears with a USP factor of 100 % If the measured conductivity is
greater Than 1 uYcm. With a USP factor of 80 %, this message appears when the measured conductivity
is greater than 0.8 pS/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 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 SevenMulii™ 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 fo 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 | HS/cm S/m | mS/cm
Е-6 | 0.01 E+0 | 10
E—b | 0.1 E+1 | 100
E-4 | 1 E+2 | 1000
E-3 | 10
E-2 | 100
E-1 | 1000
В. Calibration Settino ДД
1. Set Callbration Standard
1.10, 84, 500 & 1413 pS/cm, 12.88 mS/cm
1. Auto Standard Recognition On
For automatic standard recognition in the calibrafion, the nominal cell constant ot 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.
2. 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 fo the input field.
— Press Save fo accept the selected standards.
2. Saturated NaCl
60
METTLER TOLEDO SevenMulfi™
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 if directly in the
SevenMulti™.
— Press Cal in the measurement display; the request to enter the cell constant then appears.
4. Enter your Speclal Standard
If you are using your own conducfivity sfandard for calibrafion 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 fo the conductivity of natural water
at 25 °C, exclusively caused by the autoprotolysis of wafer.
For The special standard, you can enter up to 5 temperafure-dependent values in the fable.
Use + t to navigate within the table, delete using + and press Save fo save the values.
Set Callbration Reminder
1. Off — no calibration reminder
2. Remind by Interval Time
If the calibration reminder is active, you are reminded fo perform a new calibration after a specified amount
of fime has passed. The reminder comes in the form of a message on the bottom line of the measurement
display.
Activating this item leads fo an input window, info which you enter the time interval (1 to 1000 h).
3. 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 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 sel time period expires.
You set this time period (3 s to 3600 s) in the following input window.
METTLER TOLEDO SevenMulii™ 61
The Conductivity expansion unit
Information on the display
The following symbols appear on the display, depending on the endpoint sefting :
Preselected format | Start of mea- Signal stability | Endpolnted
surement measurement ")
Auto endpoint À {А A
A Read —> M
Manual endpoint — | M 7 Read > M
М Read — M
Timed endpolnt T Is > f
T Read — M
12 The actual endpoint format (last column) not the preselected is stored with the data.
(4. Set MTC Temperafure (manual femperafure compensafion) Ee
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.
In This menu, you can define the upper and lower limits for measurement or calibration data. It a limit is exceeded
or undershot, a warning is output to the screen. This message also appears on the GLP printout.
Before enfering a limif, you can acfivafe or deacfivafe the alarm for this limif.
Parameter Minimum Maximum Unit
Conductivity 0.000 1100.000 mS/cm
Temperature —30.0 130.0 °C
Cell Constant 0.000001 200.0 1/cm
6. IImedilnierval 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 fime inferval is enfered, a menu appears tor selection of the mode otf measured dafa 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.
62 METTLER TOLEDO SevenMulfi™
The Conductivity expansion unit
2.
3. Log to Memory and Interface
The measurement dafa is saved in SevenMulti™ and transferred to an attached computer or printer via the
interface.
Off — no series measurement
/. SelectDaïta 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 altached 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. ActlvatelRondolino Sample Change
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 input window of the next Rondolino position using +. 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 fo confirm your entry.
— Press Start. After the last measurement a table appears showing the cell constants.
METTLER TOLEDO SevenMulii™ 63
The Conductivity expansion unit
Notes
o A METTLER TOLEDO fitration stirrer can be connected using the Seven/Rondolino Stirrer Driver accessories. This
allows fully-automatic measurement with a high rate of repeatability.
® For measurements: If you have selected log to interface, the data is fransferred after each individual reading. If
you have selected log to memory, the data is saved as in a normal reading.
. Analog Output Settin
The conductivity expansion unif has a separate analog ouput, where the conductivity measurement is converfed
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 titration unit.
The output voltage depends on the measurement range.
The following values are available for the mean output voltage at the analog output:
No. | Mean value Meas. range 18 — 180 mV Meas. range 180 — 1800 mV
1. | 20 us/cm 2 — 20 us/cm 20 — 200 uS/cm
2. | 200 pS/em 20 — 200 uS/cm 0.2 —2 mS/cm
3. |2mScm 0.2 —2 mS/cm 2 —20 mS/cm
4. [20 mS/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 ucm — 100 uS/cm 300 — 600 mV
100 pS/cm — 1 mS/cm 600 — 900 mV
I 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
IT. Conductivity Methods in Memory ДЕВИН
A total of 40 methods for all applications can be stored.
1. Load a Stored Method from Memory
A list of the names of sfored 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 SevenMulfi™
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 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 fhe conducfivity sensor is changed, calibrafion must be performed again, as each sensor has a different
cell constant.
— Altach 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
Conductivity menu 4. Set MTC Temperature).
— Place the conductivity sensor info 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 conducfivity standard on hand.
— In the Conductivity menu under 2.1. Set Calibration Standard or enter the conductivity of the conductivity stan-
dard.
Performing callbration
— 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 standard
recognition, SevenMulfi™ automatically recognizes the predefined standards.
If a standard other than the selected one is to be used, it can still be changed using the li key.
Depending on the endpoint format selected, the value is displayed when the measured value is stable.
If you want fo 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 SevenMulii™ 65
The Conductivity expansion unit
If you wanf fo calibrate over a wide conducfivity 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 lo 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 3b °C. Otherwise, the warning Standard temp. out of range appears.
e The value 0 S/m for a specific resistivity tending toward infinity is permanently programmed in the Seven-
Multi,
66 METTLER TOLEDO SevenMulfi™
The Conductivity expansion unit
1.2
7.2.1
The TDS mode
Menu structure of the TDS mode
N. Measurement Setting Page 681
1. Select Reference Temperature
2. Select Temp. Correction Method
1. Linear Correction
2. Non-linear Correction: Natural Water
3. Off
3. Set TDS Factor
12. Calibration Settings Page 607
1. Set Calibration Standard
1. 10, 84, 500 & 1413 pS/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
В. Select Endpolnt Formats A Page 6 Y
1. Aufo
2. Manual
3. Timed
4. Set MTC Temperature Раде 62]
9. Set Alarm Limits
1. TDS Max. Limit
2. TDS Min. Limit
3. Temperature Max. Limit
4. Temperature Min. Limit
5. Cell Constant Max. Limit
6. Cell Constant Min. Limit
16. Timed Interval Readings
1. On
1. Log to Memory
2. Log fo Interface
3. Log lo Memory and Interface
2. Off
. Select Data Transfer Mode Page E
1. Automatic Data Transter
1. Log to Memory
2. Log fo Interface
3. Log lo Memory and Interface
2. Manual Dafa Transfer to Memory
18. Activate Rondolino Sample Changer Раде 63]
1. Measurement
2. Calibration
[9. TDS Methods In Memory ENP age 64]
1. Load a Stored Method from Memory
2. Save Current Settings as a Method
METTLER TOLEDO SevenMulii™
67
The Conductivity expansion unit
7.2.2 Operation of the TDS menu
TDS is the concentration of dissolved solids which pass through a filter 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 foo 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 fo the conductivity of a sample.
TDS (mg/L) is calculated by multiplying the conductivity value (mS/cm) by the TDS factor.
— If two expansion unifs are affached, first ensure thaf the desired expansion unif is selecfed.
— 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 detalled description can be found In Section 7.1.2 Operation of the Conductlv-
[ty menu on pages 58 10 65.
IT. Measurement Seffin
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 referenced 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 Coefficlent
The input window for the temperature-correction coefficient (O — 10 % / °C) appears.
The measured TDS value of the sample is corrected and displayed using the following equation:
Grret = 61/ (1 + (aT — Tre))/ 100 %)
whereas
G; = conductivity measured at temperature T (mS/cm)
Gore = conductivity (mS/cm) displayed by the instrument, calculated back to îhe reference temperature Trer
ao = linear temperature correction coefficient (%/°C); a = O: no temperature correction
T = measured temperature (°C)
Try = Reference temperature (20 °C or 25 °C)
68 METTLER TOLEDO SevenMulfi™
The Conductivity expansion unit
2. Determine Temp. Correction Coefficlent
To determine the a coefficient, the sample has fo be measured at two different temperatures.
— First measure the sample at a temperature that is different lo That of Ihe reference temperature and that is
in the typical range of the sample temperature.
— Then measure the sample at the reference temperature.
— A window wiih the calculated value of a appears. Press Save to accept the value. 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 f,5 for the measured temperature (see table in appen-
dix) and thus corrected fo the reference temperature of 25 °C:
Gras = Gy | fs
If another reference temperature is to be used, e.g. 20 °C, the conductivity corrected 25 °C Is divided by
1.116 (see f,5 for 20.0 °C)
Grao = (Gr f95)/ 1.116
Note: Conductivity measurements of natural water can only be performed af temperatures ranging from
0 °C fo 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
(а = 0%/°С).
3. Set TDS Factor
TDS is calculated by multiplying the conductivity value by the TDS factor.
The input window for the TDS factor appears.
— Enfer factor (between 0.4 and 1.0) and save with Save.
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 oufput fo the screen. This message also appears on the GLP printout.
Before enfering a limit, you can activate or deactivate the alarm for this limit.
Parameter Minimum Maximum Unit
TDS 0.0001 1000 g/L
Temperature —30.0 130.0 °C
Cell Constant 0.000001 200.0 1/cm
METTLER TOLEDO SevenMulii™
69
The Conductivity expansion unit
7.2.3 Measuring total dissolved solids (TDS)
A conductivity measured value can be converted to a fotal 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 ifs own
cell constant and the calculation of the TDS value 1$ based on the cell constant. (For calibration see Section 7.1.4
Calibrating a conductivity sensor)
— Altach 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 TDS
Menu 4. Set MTC Temperature).
— Place the conductivity sensor info the sample and press Read.
The TDS value of the sample is shown on the display.
70 METTLER TOLEDO SevenMulfi™
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 fo Memory
2. Natural Sea Water Scale 1966 2. Log fo Inferface
3. Log to Memory and Interface
12. Calibration Settings Page 60)
a 2. Off
1. Set Calibration Standard
1. 10, 84, 500 & 1413 uS/cm, 12.88 mS/cm . Select Data Transfer Mode Page 6
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 lo Memory and Interface
1. Off 2. Manual Data Transfer to Memory
2. Remind by Interval Time
18. Activate Rondollno Sample Changer Раде 63]
13. Select Endpoint Formais Page 6 6
1. Measurement
1. Auto 2. Calibration
2. Manual
3. Timed 19. Salinity Methods In Memory Page 64)
1. Load a Stored Method from Memory
e. Set MIC Temperature 2. Save Current Seftings as a Method
5. Set Alarm Limits Page
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 SevenMulii™ 71
The Conductivity expansion unit
7.32 Operation of the Salinity menu
— If two expansion unifs 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 corresponds to that of the Conductivity menu except for Item 1. Select Salinity
Type and 5. Set Alarm Limits. A detalled description can be found In Section 7.1.2 Operation of the Conductivity
menu on pages 58 to 65.
IT. Select Saliniiy Туре
1. Practical Salinity Scale (UNESCO 1978)
In the official definition, the salinity Sig, of a sample in psu (practical salinity unif) is calculated using the fol-
lowing formula af standard atmospheric pressure:
5 | 5
5-Х од” —- (1-15) > oR)”
j=0
+K(T—15) £
do = 0.0080 bo= 0.0005 k = 0.00162
a, = —0.1692 b = -0.0056
d,= 25.3851 b,= —0.0066
аз = 14.0941 р. = —0.0375
а; = — 7.0261 р, = 0.0636
as = 2.7081 b= —0.0144
Csampie( T) ;
Ry = Cra T) (32.4356 g KCI per 1000 g of solution)
2. Natural Sea Water Scale (UNESCO 1966b)
According to the older definition, the salinity Sp,, 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:
Sot =—0.08996 + 28.2929729 R+ 12.80832 R? — 10.67869 R°+ 5.98624 R*— 1.32311 R°
whereas
R = Csampie / CWIth T = 15 °C
Csampie = 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 < T < 31 °C:
Ry = Coampie(TD / CCM
R = №; + 105 Ri (R-— 1CT — 15) [96.7 - 72.0 №; + 37.3 К? - (0.63 + 0.21 К;2)(Т - 15) ]
72 METTLER TOLEDO SevenMulfi™
The Conductivity expansion unit
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 oufput fo the screen. This message also appears on the GLP printout.
Before enfering a limit, you can activate or deactivate the alarm for this limit.
Parameter Minimum Maximum Unit
Salinity 0.00 80.00 рр!
Temperature —30.0 130.0 °C
Cell Constant 0.000001 200.0 1/cm
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)
— Altach 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
Salinity Menu 4. Set MTC Temperature).
— Place the conductivity sensor into the sample and press Read.
The salinity of the sample is shown on the display.
METTLER TOLEDO SevenMulii™ 73
The Conductivity expansion unit
1.4
7.4.1
The Resistivity mode
Menu structure of the Resistivity mode
N. Measurement Setting Page 751
1. Select Reference Temperature
2. Select Temp. Correction Method
1. Linear Correction
2. Non-linear Correction: Natural Water
3. Off
12. Calibration Settings Page 601
1. Sef Calibration Standard
1. 10, 84, 500 & 1413 pcm, 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
13. Select Endpoint Formats Page 618
1. Auto
2. Manual
3. Timed
(4. Set MTC Temperature Page 62]
9. Set Alarm Limits Page
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
16. Timed Interval Readings Bl Page 62]
1. Оп
1. Log to Memory
2. Log fo Inferface
3. Log to Memory and Interface
2. Off
. Select Data Transfer Mode Page E
1. Automatic Data Transter
1. Log to Memory
2. Log fo Inferface
3. Log to Memory and Interface
2. Manual Data Transfer to Memory
18. Activate Rondolino Sample Changer Раде 63]
1. Measurement
2. Calibration
19. Resistivity Methods In Memory Page 64)
1. Load a Siored Method from Memory
2. Save Current Settings as a Method
74
METTLER TOLEDO SevenMulfi™
The Conductivity expansion unit
7.42 Operation of the Resistivity menu
— If two expansion unifs 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. Меа-
surement Setting and 5. Set Alarm Limits. A detalled description can be found In Section 7.1.2 Operation of the
Conductivity menu on pages 57 to 65.
IT. Measurement Seffing
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 Coefficlent
The input window for the temperature-correction coefficient (O — 10 % / °C) appears.
The measured resistivity is corrected and displayed using the following formula:
Ст = G1/ (1 + (a(T = Tpe))/ 100 %)
whereas
G, = resistivity measured at temperature T (mS/cm)
Gore = resistivity (mS/cm) displayed by the instrument, calculated back to the reference temperature Tp
à = linear temperature correction coefficient (%/°C); a = 0: no temperature correction
T = measured temperature (°C)
Tre = Reference temperature (20 °C or 25 °C)
2. Determine Temp. Correction Coefficlent
To determine the a coefficient, ihe sample has to be measured af wo 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 a appears. Press Save to accept the value. If you exit the menu
by pressing EXIt, the resulf is discarded.
METTLER TOLEDO SevenMulii™ 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 1,5 for the measured temperature (see fable in appen-
dix) and thus corrected to the reference temperature of 25 °C:
Gros = Gy y fs
If another reference temperature is to be used, e.g. 20 °C, the conductivity corrected to 25 °C is divided by
1.116 (see f,; for 20.0 °C)
Broo = (Gy +15) / 1.116
Note: Conductivity measurements of natural water can only be performed at temperatures ranging from
0 °C fo 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= 0%/°C).
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 enfering 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 1/cm
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 [ Q-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).
— Altach 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 info the sample and press Read.
The resistivity of the sample is shown on the display.
76 METTLER TOLEDO SevenMulfi™
Appendix
8. Appendix
8.1 Technical data
8.1.1 Technical data of the SevenMulti™
Screen
LCD
Outputs
RS232 serial
Settable: baud rafe (1200, 2400, 4800, 2600 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 = 10 К©
Amblent conditlons | Room temperature 5°C ... 40°C
Relative humidity 80 % at 31 °C, decreasing linearly to 50 % at 40 °C
Overvoltage category Il
Degree of confaminafion 2
Dimensions | 190 x 240 x 65 mm
Weight | Basic device 850g
1 expansion unit 135 g
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 / bO Hz, 10 VA, 9 V DC
UK 240 V/ 50 Hz, 10 VA, 9V DC
Japan 100 V/ 60/60 Hz, 10 VA, 9 V DC
Materlals | Housing ABS, reinforced with PC
Expansion unifs 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 | Inpui impedance = 3: 10° ©2
Input offset current <= 1]. 1072 A
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 °С... 130 °С
Temperature compensation | ATC —5 °С... 130 °C
MTC —30 °C … 130 °C
Measurement range/Reso- | Auto range Scientific notation
lution | — — 5.00... 9.99E-7 Ym 0.01E-7 Sm
— — 1.00... 9.99E-6 S/m 0.01E-6 Ут
— — 1.00... 9.99E-5 S/m 0.01E-b S/m
0.001 ... 1.999 uS/cm 0.001 pS/cm | 1.00... 9.99Е-4 Ут 0.01E-4 S/m
2.00... 19.99 uScm 0.01 uS/em 1.00... 9.99E-3 S/m 0.01E-3 Sm
20.0... 199.9 uS/cm 0.1 uS/em 1.00... 9.99Е-2 Ym 0.01E2 S/m
200 ... 1999 uS/em 1 uS/cm 1.00... 9.99E-1 S/m 0.01E-1 Sm
2.00... 19.99 mS/cm 0.01 mScm 11.00... 9.99Е+0 Ут 0.01E+0 S/m
20.0 ... 199.9 mS/cm 0.1 mS/cm 1.00 ... 9.99E+1 Sm O0.01E+1 S/m
200 ... 1000 mS/cm 1 mS/cm — —
Limits of errors | + 0.5 % of measured value
Analog output | Oufput impedance < 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 % ... 999.9 %
Resolution | + 1 of the least significant digif
Limits of error | + 0.5 % of measured value
Sensor Input | Input impedance > 3 - 1029
Input ottset current < ] - 10-? A
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 + 0.1 + 0.1
Relative mV | — yes —
Temperature compensation | ATC —5.0 °С... 130.0 °С
MTC —30.0 °C ... 130.0 °C
Sensor Input | Input impedance = 3. 10° ©
Input offset current = 1-10 А
78
METTLER TOLEDO SevenMulfi™
Appendix
8.1.5 Technical data of ISFET expansion unit
Measurement range pH | 0.000 ... 14.000
Meas. range temperature | —5.0 °С... 105.0 °С
Resolution | 0.001 pH
Limits of errors | + 0.002 pH
METTLER TOLEDO SevenMulii™ 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
Disposable 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 fo titrators 51302258
LabX direct pH 51302876
Guide fo pH measurement 51300047
Guide fo conductivity and dissolved oxygen 51724716
Guide to ion selective measurement 51300075
pH 4.01 buffer, 30 packefs at 20 mL each 51302069
pH 4.01 buffer, G boîtles ai 250 mL each 51340058
pH 7.00 buffer, 30 packefs at 20 mL each 51302047
pH 7.00 buffer, 6 bottles at 250 mL each 51340060
pH 9.21 buffer, 30 packefs at 20 mL each 51302070
pH 9.21 buffer, 6 bottles at 250 mL each 51300194
pH 10.01 buffer, 30 packets af 20 mL each 51302079
pH 10.01 buffer, 6 boltles al 250 mL each 51340231
InLab%410, pH electrode; temperature sensor; refillable 52000118
InLab®4.12, laboratory pH electrode; glass; refillable 52000112
InLab®4 13, 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
80
METTLER TOLEDO SevenMulfi™
Appendix
Designation Order No.
HCl/pepsin solution (removes profein confamination) 51340068
Thiourea solution (removes silver sulfide confamination) 51340070
Reactivation solution tor 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 4.07 6.87 9.43 13.03
10 1.07 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 1.10 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 1.10 4.06 6.76 9.09 12.29
45 1.70 4.04 6.97 9.86 45 1.10 4.07 6.76 9.04 12.09
50 1.71 4,06 6.97 9.83 50 1.11 4.08 6.76 9.00 11.98
Buffer group 2 (ref. 25 °C) METTLER TOLEDO Europe
5
10
15
20
25
30
35
40
45
50
Buffer group 3 (ref. 20 °C) Merck standard buffers
5
10
15
20
25
30
35
40
45
50
2.02
2.01
2.00
2.00
2.00
1.99
1.99
1.98
1.98
1.98
2.01
2.01
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
4.01
4.00
4.00
4.00
4.01
4.01
4.02
4.03
4.04
4.06
4.04
4.02
4.01
4.00
4.01
4.01
4.01
4.01
4.01
4.00
7.09
7.06
7.04
7.02
7.00
6.99
6.98
6.97
6.97
6.97
7.07
7.05
7.02
7.00
6.98
6.98
6.96
6.95
6.95
6.95
9.45
9.38
9.32
9.26
9.21
9.16
9.11
9.06
9.03
8.99
9.16
9.11
9.05
9.00
8.95
8.91
8.88
8.85
8.82
8.79
11.72
11.64
11.36
11.18
11.00
10.82
10.64
10.46
10.28
10.10
12.41
12.26
12.10
12.00
11.88
11.72
11.67
11.64
11.44
11.33
Buffer group 4 (ref. 25 °C) DIN (19266) / NIST
5
10
15
20
25
30
35
40
45
50
1.668
1.670
1.672
1.676
1.680
1.685
1.691
1.697
1.704
1.712
4.004
4.001
4.001
4.003
4.008
4.015
4.026
4.036
4.049
4.064
6.950
6.922
6.900
6.880
6.865
6.853
6.845
6.837
6.834
6.833
9.392
9.331
9.277
9.228
9.183
9.144
9.110
9.076
9.046
9.018
13.207
13.003
12.810
12.627
12.454
12.289
12.133
11.984
11.841
11.705
Buffer group 6 (ref. 25 °C) JJG 119 (Chinese)
5
10
15
20
25
30
35
40
45
50
1.669
1.671
1.673
1.676
1.680
1.684
1.688
1.694
1.700
1.706
3.999
3.996
3.996
3.998
4.003
4.010
4.019
4.029
4.042
4.055
6.949
6.921
6.898
6.879
6.864
6.852
6.844
6.838
6.834
6.833
9.391
9.330
9.276
9.226
9.182
9.142
9.105
9.072
9.042
9.015
13.210
13.011
12.820
12.637
12.460
12.292
12.130
11.975
11.828
11.697
Buffer group 7 (ref. 25 °C) Technical Buffer
5
10
15
20
25
30
35
40
45
50
2.02
2.01
2.00
2.00
2.00
1.99
1.99
1.98
1.98
1.98
4.01
4.00
4.00
4.00
4.01
4.01
4.02
4.03
4.04
4.06
7.09
7.06
7.04
7.02
7.00
6.99
6.98
6.97
6.97
6.97
10.05
10.39
10.26
10.13
10.00
9.87
9.74
9.61
9.48
9.35
Buffer group 8 (ref. 25 °C) JIS Z 8802 (Japanese)
5
10
15
20
25
30
35
40
45
50
1.668
1.670
1.672
1.675
1.679
1.683
1.688
1.694
1.700
1.707
3.999
3.998
3.999
4.002
4.008
4.015
4.024
4.035
4.047
4.060
6.951
6.923
6.900
6.881
6.865
6.853
6.844
6.838
6.834
6.833
9.395
9.332
9.276
9.225
9.180
9.139
9.102
9.068
9.038
9.011
METTLER TOLEDO SevenMulii™
Appendix
8.4 Temperature-correction factors f,5
°C |.0 1 2 3 4 5 6 Л 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 1.706 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 | 1.093 1.688 1.683 1.678 1.673 1.668 1.663 1.658 1.053 1.048
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 1.682 1.578 1.573 1.569 1.664 1.660 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 1.302 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 1.28] 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 1.19] 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 1.1565 1.152 1.149 1.147 1.144
19 | 1.141 1.139 1.136 1.134 1.131 1.128 1.126 1.123 1.121 1.118
20 | 1.116 1.113 1.111 1.108 1.105 1.103 1.101 1.098 1.096 1.093
21 | 1.09] 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 1.061 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 |0.92] 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 pS/cm 84 uS/cm 500 pS/cm 1413 pScm 12.88 mS/ Saturated
cm NaCl mScm
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 14.12 277.4
35 12.14 100.92 602.5 1667 15.39 304.1
82 METTLER TOLEDO SevenMulfi™
Appendix
8.6 USP/EP tables
Conductiviy requirements (uS/cm) for USP / EP (highly purified water) / EP (purified water)
Temperature USP EP EP
[°C] [1S/cm] (highly purfied water) (purified water)
[uS/cm] [1S/cm]
0 0.6 0.6 2.4
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 1.3 5.1
30 1.4 1.4 5.4
35 1.5 1.5 —
40 1.7 1.7 6.5
45 1.8 1.8 —
50 1.9 1.9 7.1
55 2.1 2.1 —
60 2.2 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 2.7 —
90 2.7 2.7 9.7
95 2.9 2.9 —
100 3.1 3.1 10.2
METTLER TOLEDO SevenMulii™ 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 fest 32
elecirode types 13
endpoint format 33, 40, 48, 62
Endpoint Formats 26, 33, 39, 48, 61
ЕР Mode (highly purified water) 59
EP Mode (purified water) 60
F
125 factor 59, 69, 76
125 table 82
H
Help funcfion 18
|
D 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
¡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 ©
Manual temperature compensation 26, 33, 40, 48,
62
Measurement 27, 35, 41, 50, 63
Measurement Units 45, 60
Measuring absolute potential 47
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 SevenMulfi™
Index
Measuring fotal dissolved solids (TDS) 70
Memory Functions 14, 15
Menu structure of the conductivity mode 57
Menu sfruciure otf the Data menu 14
Menu structure of the Dual Channel menu 25
Menu sfruciure 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
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 bb
Ouipui 21
P
Pin assignments ©
PIN codes 23
Practical Salinity Scale (UNESCO 1978) 72
Printouf format 22
P1000 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
Resolufion 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) 7?
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 125 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
Transfer Measurement Data 15
TIL 6
TTL communication module 10
U
USB 6
USB communication module 10
User ID 13
USP / EP tables 83
USP Mode 59
METTLER TOLEDO SevenMulii™
85
86
METTLER TOLEDO SevenMulfi™
METTLER TOLEDO SevenMulii™
87
88
METTLER TOLEDO SevenMulfi™
Quality certificate. Development, production and testing according 10 1509001.
ISO 1SO
22017 12001 Environmental management system according to 15014001.
ÉS Worldwide service. Our exiensive service network is among the best in the
SERVICE 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
Prinfed on 100% chlorine-free paper, for the sake of our environment.
*Po1710416*
© 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
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising