Mettler-Toledo Benchtop pH meters SevenDirect™ SD20 LowVol kit User guide

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Page 1

Reference Manual

SevenDirect™ SD20

pH Meter

Page 2

Page 3

1 Introduction 3

2 Safety Information 4

2.1 Definitions of signal words and warning symbols ............................................... 4

2.2 Product specific safety notes ............................................................................ 4

3 Design and Function 6

3.1 Overview........................................................................................................ 6

3.2 Rear panel connections ................................................................................... 6

3.3 User interface ................................................................................................. 7

3.3.1 Main sections at a glance ................................................................ 7

3.3.2 Home screen .................................................................................. 7

3.3.2.1 Display representation ................................................................ 8

3.3.3 How to operate the touch screen ....................................................... 10

3.3.3.1 Selecting or activating an item ..................................................... 10

3.3.3.2 Scrolling up and down................................................................ 10

3.3.3.3 Accessing specific menus............................................................ 11

3.3.3.4 Secondary functions for list items ................................................. 11

3.3.3.5 Entering characters and numbers ................................................. 11

3.3.3.6 Entering numbers and unit .......................................................... 11

3.3.3.7 Changing date and time.............................................................. 12

4 Putting into Operation 13

4.1 Scope of delivery ............................................................................................ 13

4.2 Mounting EasyPlace™ .................................................................................... 13

4.3 Installing power supply.................................................................................... 13

4.4 Switching the instrument on and off................................................................... 14

4.5 First Startup Wizard......................................................................................... 14

4.6 Connecting sensors......................................................................................... 15

5 Starting Analysis 16

5.1 Selecting a method ......................................................................................... 16

5.2 Selecting a sensor........................................................................................... 16

5.3 Starting a calibration ....................................................................................... 16

5.4 Starting a verification....................................................................................... 17

5.5 Starting a measurement................................................................................... 17

5.6 Interrupting analysis........................................................................................ 18

5.7 Endpoint criterion............................................................................................ 18

5.8 Measurement status ........................................................................................ 18

6 Menu 19

6.1 Logging in and out.......................................................................................... 19

6.2 Global settings ............................................................................................... 20

6.2.1 General .......................................................................................... 20

6.2.2 Peripherals ..................................................................................... 20

6.2.3 Analysis settings ............................................................................. 21

6.2.4 User settings................................................................................... 22

6.3 User management........................................................................................... 23

6.3.1 Creating a new user......................................................................... 23

6.3.2 Deleting an user.............................................................................. 24

6.3.3 Changing the password ................................................................... 24

6.3.4 Editing User Group .......................................................................... 25

6.4 Sensors ......................................................................................................... 26

6.4.1 Creating a sensor ............................................................................ 26

Table of Contents 1SevenDirect™ SD20

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6.4.2 Deleting a sensor ............................................................................ 26

6.4.3 Editing a sensor .............................................................................. 27

6.4.4 pH Sensor Parameters ..................................................................... 27

6.4.5 Redox Sensor Parameters ................................................................ 28

6.5 Buffers & Standards ........................................................................................ 29

6.5.1 Creating customized buffer group / standard list.................................. 30

6.6 Maintenance & Service .................................................................................... 31

6.6.1 Instrument ...................................................................................... 31

6.6.2 Service........................................................................................... 31

6.6.3 Peripherals status............................................................................ 32

6.6.4 Import / Export ................................................................................ 32

6.6.5 Update ........................................................................................... 32

6.6.6 Firmware history ............................................................................. 33

6.6.7 Factory reset ................................................................................... 33

7 Methods 34

7.1 Adding a new method ..................................................................................... 34

7.2 Cloning a method ........................................................................................... 35

7.3 Deleting a method........................................................................................... 35

7.4 Editing a method ............................................................................................ 36

7.5 Printing a method ........................................................................................... 37

7.6 pH method parameters .................................................................................... 37

7.7 Redox method parameters ............................................................................... 41

7.8 Stability criteria ............................................................................................... 44

8 Result 45

8.1 Results fly-in .................................................................................................. 48

8.2 Result details.................................................................................................. 49

8.2.1 Result Reason & Result Status .......................................................... 49

9 Maintenance and Care 51

9.1 Cleaning the Instrument ................................................................................... 51

9.2 Maintenance of electrodes................................................................................ 51

9.3 Transporting the instrument.............................................................................. 52

9.4 Disposal ........................................................................................................ 52

10 Sensors, Solutions and Accessories 53

11 Technical Data 55

12 Appendix 57

12.1 Predefined buffers ........................................................................................... 57

12.2 Predefined standards....................................................................................... 61

Table of Contents2 SevenDirect™ SD20

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1 Introduction

The SevenDirect is an intuitive, easy-to-operate benchtop meter for parameters such as pH, redox potential, conductivity and ion concentrations (depending on instrument version). It is designed for robustness in typical laboratory settings and supports the recording and transfer of important measurement data.

Conventions and symbols

Refers to an external document.

Note

For useful information about the product.

Elements of instructions

Instructions always contain action steps and can contain prerequisites, intermediate results and results. If an instruction contains more than one action step, the action steps are numbered.

Prerequisites that must be fulfilled before the individual action steps can be executed.

1 Action step 1

Intermediate result

2 Action step 2

Result

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2 Safety Information

Two documents named "User Manual" and "Reference Manual" are available for this instrument.

The User Manual is printed and delivered with the instrument. The electronic Reference Manual contains a full description of the instrument and its use. Keep both documents for future reference. Include both documents if you transfer the instrument to other parties.

Only use the instrument according to the User Manual and the Reference Manual. If you do not use the instrument according to these documents or if the instrument is modified, the safety of the instrument may be impaired and Mettler-Toledo GmbH assumes no liability.

User Manual and Reference Manual are available online.

u www.mt.com/library

The FCC Supplier Declaration of Conformity is available online.

u http://www.mt.com/ComplianceSearch

2.1 Definitions of signal words and warning symbols

Safety notes contain important information on safety issues. Ignoring the safety notes may lead to personal injury, damage to the instrument, malfunctions and false results. Safety notes are marked with the following signal words and warning symbols:

Signal words

WARNING

NOTICE

Warning symbols

A hazardous situation with medium risk, possibly resulting in death or severe injury if not avoided.

A hazardous situation with low risk, resulting in damage to the instrument, other material damage, malfunctions and erroneous results, or loss of data.

Electrical shock

2.2 Product specific safety notes

Intended use

This instrument is designed to be used by trained staff. The SevenDirect™ SD20 pH Meter is intended for measuring pH and redox potential.

Any other type of use and operation beyond the limits of use stated by Mettler-Toledo GmbH without consent from Mettler-Toledo GmbH is considered as not intended.

Responsibilities of the instrument owner

The instrument owner is the person holding the legal title to the instrument and who uses the instrument or authorizes any person to use it, or the person who is deemed by law to be the operator of the instrument. The instrument owner is responsible for the safety of all users of the instrument and third parties.

Mettler-Toledo GmbH assumes that the instrument owner trains users to safely use the instrument in their workplace and deal with potential hazards. Mettler-Toledo GmbH assumes that the instrument owner provides the necessary protective gear.

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Safety notes

WARNING

Death or serious injury due to electric shock

Contact with parts that carry a live current can lead to death or injury. 1 Only use the METTLER TOLEDO AC/DC adapter designed for your instrument. 2 Keep all electrical cables and connections away from liquids and moisture. 3 Check the cables and the plugs for damage and replace damaged cables and plugs.

NOTICE

Damage to the instrument or malfunction due to the use of unsuitable parts

Only use parts from METTLER TOLEDO that are intended to be used with your instrument.

FCC Rules

This device complies with Part 15 of the FCC Rules and Radio Interference Requirements of the Canadian Department of Communications. Operation is subject to the following conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

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3 Design and Function

3.1 Overview

# Description Function

1 On screen help To display help information for the current screen.

2 Home

3 Touch screen Displays information and operates the meter.

4 Power switch Switches the meter on/off.

5 Connector protection

rubber

6 Connector protection

cover

7 Status light Indicates whether the meter is:

To return from any menu level to Home screen.

Press to switch on. Press and hold for 3 seconds to switch off.

The removable dust rubber protects the meter from dust and the grooves are used for cable guidance.

Closed to prevent dust from entering the meter. Open to access rear panel connections.

ready for use: green in use: blinking green user intervention required: yellow blocked: red

3.2 Rear panel connections

DC power supply socket

ATC socket for temperature signal input

USB-B interface

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BNC socket for mV/pH signal input

USB-A interface (USB-Stick, printer, barcode

reader)

Mini DIN socket for EasyMix

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Note For best performance, use USB memory stick with FAT16 or FAT32 file system.

3.3 User interface

Note The screen shots in this manual are examples and can differ from the screen on your meter.

3.3.1 Main sections at a glance

The Home screen (1) is the central navigation point where all the menus and settings can be found. The Menu (2), Methods (3) and Results fly-in (4) open when using the handles along the sides of the main screen. The

Result (5) opens when tapping List from (4).

3.3.2 Home screen

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# Description Function

Standard view

uFocus™ view

1 User name Displays the name of the current user.

2 Methods handle

3 Date and time Displays the current date and time.

4 Activate / deactivate

uFocus™ mode

5 Measurement

reading area

6 Results handle

7 Method information

area

Read

Calibration

Verification

Terminate

12 Menu handle

13 Menu button

3.3.2.1 Display representation

There are two modes available for the display representation: the full-information screen with all the information displayed, and the measurement close-up screen uFocus™, where the method information area is hidden and the measurement information is shown in large font. To toggle between these views, touch Activate / deactivate uFocus™ mode button before, during or after a measurement.

Enters into Methods to view and edit methods.

The format is set in Menu > Settings > General.

Switches modes for the display representation. Details see [Display representation Page8].

Displays the results of the current measurement, calibration or verification.

Enters into Results fly-in to see the list of the latest 7 results.

Displays the information about the sample, sensor and method.

Starts measurements and confirms measurement results.

Reviews sensor status, changes sensor and starts calibrations.

Reviews sensor status, changes sensor and starts verifications.

Terminates the measurement, calibration or verification.

Enters into Menu to maintain settings, user management, sensors, buffers & standards and maintenance & service.

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# Description Function

1 Method ID Displays the measurement mode and the name of the active method.

'pH:': can perform pH measurement, pH sensor calibration and pH sensor verification

'Redox:': can perform redox measurement and redox sensor verification

2 Duration : displays the duration of the measurement.

: displays the number of data points which are already recorded.

Only if Methods > Measure > Interval reading is active, you can tap to switch between these 2 modes.

3 Temperature Displays the temperature.

Tap to perform a temperature check while the meter is in idle state.

: gets the temperature value from the sample automatically. : tap to change the temperature value used for the current

measurement only.

4 Endpoint type Displays the information of the endpoint type.

If a user belonging to the Administrator user group is logged in, you can tap to enter the active method to adjust settings for the endpoint type and the stability criterion.

1. Endpoint type, defined in Methods > Measure > Endpoint type.

Automatic: stops the measurement automatically when the signal

is stable.

Manual: manually stops the measurement by tapping Manual

endpoint.

Timed: stops the measurement after the predefined time.

2. Stability Criterion (pH only), defined in Methods > Measure > Stability criteria. Details see [Stability criteria Page44].

Strict Standard Fast

5 Sensor name Displays the information of the selected sensor.

Tap to change to another sensor if no sensor is defined in the method and no ISM sensor is connected.

1. pH electrode condition

Slope: 95-105% / Offset: ±(0-20) mV (Electrode is in good

condition)

Slope: 94-90% / Offset: ±(20-35) mV (Electrode needs

cleaning)

Slope: 89-85% / Offset: ±(>35) mV (Electrode is defective or too

old)

2. Informs about whether a calibration is due based on:

Methods > Calibration > Calibration reminder Menu > Settings > Analysis settings > Calibration expiry action

3. Inform about whether a verification is due based on:

Methods > Verification > Verification reminder Menu > Settings > Analysis settings > Verification expiry action

6 Sample ID Displays the information of the sample ID.

Tap to set the sample ID manually.

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# Description Function

7 Range indicator Only visible for pH measurement mode.

8 Reading Displays the measurement value and used measurement unit.

3.3.3 How to operate the touch screen

The meter is operated by using a finger tapping on the touch screen.

NOTICE

Danger of damaging the touch screen with pointed or sharp objects!

Pressing on the touch screen with pointed or sharp objects may be damaged it.

Operate the touch screen by applying gentle pressure with the pad of your finger.

3.3.3.1 Selecting or activating an item

Tap the item or function to be selected or activated.

The green area shows the range covered by the current calibration.

The bold vertical line will move to indicate the current measured value.

If Methods > Measure > Limits of the measurement are defined, the limits are also indicated on the bar, marked as vertical lines.

pH: raw value 'mV' with unit 'pH', 'mV' Redox: raw value 'mV' with unit 'mV', 'Rel.mV'

3.3.3.2 Scrolling up and down

1 Place the finger on the screen. 2 Move the list or content up and down.

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3.3.3.3 Accessing specific menus

1 2

The handles are placed along the sides of Home screen. Use the handles to access specific menus.

To use the handles, proceed as follows:

Place the finger on the handle and slide the function window out or in.

- or -

Swipe across the measurement reading area away from the handle of the menu which you want to open or close.

- or -

Tap the handle symbol to open or close the function window.

3.3.3.4 Secondary functions for list items

To access the secondary functions, proceed as follows:

Place the finger on the triangle symbol and slide to the left to display the secondary functions.

- or -

Swipe left across a list item to display its secondary functions and swipe right across to hide its secondary functions.

- or -

Tap to display or hide the secondary functions.

3.3.3.5 Entering characters and numbers

The instrument has different keyboard layouts of the alphanumeric input field which can be selected in Menu > Settings > User settings > Language.The following image is an example of the English keyboard.

# Description Function

1 Backspace Deletes the character left of the current curser position. The curser can be

positioned by using the touch screen.

2 Discard Closes the keyboard dialog and discards the input.

3 Confirm Confirms the entered information.

4 Numbers and

Switches to the keyboards for special characters and numbers.

special characters

5 Shift Switches between lower or upper case letters.

Double tap can engage caps lock.

3.3.3.6 Entering numbers and unit

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# Description Function

1 Discard Closes the keyboard dialog and discards the input.

2 Confirm Confirms the entered data.

3 Unit Lists optional units. Tap to switch the unit.

4 Backspace Deletes the number left of the current curser position. The curser can be

3.3.3.7 Changing date and time

The display field (1) shows the defined date or time. Scroll to move the list up/down to change the display field.

Note The format of date and time can be defined in Menu > Settings > General.

Only displayed if the unit can be changed.

positioned by using the touch screen.

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4 Putting into Operation

4.1 Scope of delivery

Unpack the instrument and check the scope of delivery. Keep the calibration certificate in a safe place. SevenDirect™ is delivered with:

AC adapter Electrode arm EasyPlace™ complete Protective cover EU Declaration of conformity Test report User Manual (print version)

4.2 Mounting EasyPlace™

1 Attach the base plate (1) to the pole (2) by tightening the

Screws (3) by hand. 2 Put the Top Cover Pole (4) on the pole. 3 Insert the Sensor Holder (5) into the electrode arm (6). 4 Put the Parking Beaker Insert (7) into the Parking Beaker

(8). 5 Put the Parking Beaker to the dedicated storage position

(9). 6 Put the Sachet Holder (10) to the dedicated position

(11), which is used to hold the buffers/standards. 7 Press the button (12) and slide up and down to adjust

the height. 8 Rotate the electrode arm to adjust the sensor position.

4.3 Installing power supply

WARNING

Death or serious injury due to electric shock

NOTICE

Danger of damage to the AC adapter due to overheating!

If the AC adapter is covered or in a container, it is not sufficiently cooled and overheats. 1 Do not cover the AC adapter. 2 Do not put the AC adapter in a container.

The instrument is operated using an AC adapter. The AC adapter is suitable for all supply line voltages ranging from 100...240 V AC ±10% and 50-60 Hz.

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1 Insert the correct connector plug into the AC adapter until

it is completely inserted.

2 Connect the cable of the AC adapter with the DC socket of

the instrument.

3 Install the cables in such a way that they cannot be

damaged or interfere with operation.

4 Insert the plug of the AC/DC adapter into a power outlet

that is easily accessible. To remove the connector plug, push the release button

and withdraw the connector plug.

4.4 Switching the instrument on and off

Switching the instrument on

1 Press the power switch.

The StatusLight turns on. 2 Wait for 1 - 2 seconds, the screen lights up and displays the startup image. 3 The instrument is initialized. The instrument will be ready for operation in about 25 seconds.

Switching the instrument off

NOTICE

Risk of data loss when switching off

The data will be lost when switching off while any processes are active. – Make sure no measurement, calibration, verification, transfer and printout is running before

you switch off the instrument.

1 Press the power switch for 3 seconds. 2 The instrument stops running tasks and shuts down. This process will take some time.

The screen turns off.

4.5 First Startup Wizard

At first startup of the instrument or after a factory reset, a First Startup Wizard guides you through the major settings of the instrument.

1 Select a Language from the language list.

The user interface switches to the language selected

immediately. 2 Tap Next.

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3 Scroll down to read the EULA and make it active. 4 Tap Next.

5 Set the date format, date and time one by one. 6 Tap Next.

7 Select the temperature unit and default buffers. 8 Tap Finish.

Get into Login screen.

9 Tap the default user account without password to enter

Home screen.

If you want to change settings made during the startup wizard, they are all available in the settings menu.

4.6 Connecting sensors

When connecting a sensor, make sure that the plugs are properly inserted. If you are using a sensor with a built-in temperature probe or a separate temperature probe, connect the second cable to the ATC socket.

Example

Connect a pH sensor to the BNC plug and if a temperature sensor, ISM or both are integrated, connect the RCA (Cinch) plug to the ATC input.

ISM® sensor

When connecting an ISM® sensor to the meter, the ISM icon appears on the display and the sensor name of the sensor chip is registered and appears on the display.

The calibration history, the initial data and the maximum temperature can be reviewed in the data memory.

Note We strongly recommend you to switch off the meter when disconnecting an ISM sensor. In doing so, you make sure that the sensor is not removed while the instrument is reading data from or writing data to the ISMchip of the sensor.

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5 Starting Analysis

5.1 Selecting a method

Before starting the analysis, you must first select a method. You can select a predefined or user-defined method directly from the method lists.

To select a method, proceed as follows:

1 Use the top handle to access into Methods menu. 2 Select a measurement mode from the side tab on the left. 3 Tap the method you want to start.

The measurement mode and method name is shown on Home screen.

5.2 Selecting a sensor

If the parameter in Methods > Configuration > Sensor is defined as 'Any' and no ISM sensor is connected, you can change a sensor on Home screen before starting an analysis.

To select a sensor, proceed as follows:

1 Tap the sensor name on Home screen.

- or Tap Calibration > Change sensor.

- or Tap Verification > Change sensor.

The names of all available sensors are listed. 2 Tap the sensor that you want to select.

The last calibration date of the sensor and the required buffers/standards are displayed. 3 Tap Close to go back to Home screen.

- or Tap Start calibration to start the calibration.

- or Tap Start verification to start the verification.

5.3 Starting a calibration

The meter allows you to perform pH calibrations with up to 5 points. The successful calibration data will be stored into the active sensor data.

Note

The use of a temperature sensor or electrode with a built-in temperature sensor is recommended. If you use (Manual) mode, you should enter the correct temperature value for each measurement and

keep all buffers/standards and sample solutions at the set temperature. To ensure the most accurate readings, you should perform calibrations regularly.

Performing a Calibration

Ensure that the appropriate buffers/standards have been selected. 1 Select an appropriate method according to [Selecting a method Page16]. 2 Select a sensor if necessary according to [Selecting a sensor Page16]. 3 Tap Calibration. 4 Tap Start calibration. 5 Enter the lot number if Methods > Calibration > Check buffer lot number is active and confirm with OK.

The sensor name, the endpoint type and buffers/standards points are displayed. 6 Place the sensor in a calibration buffer/standard. 7 Tap Read.

The font of the measurement values turns to light blue. 8 The measurement stops when the endpoint criterion is fulfilled. See [Endpoint criterion Page18].

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appears in front of the passed calibration point. 9 Rinse the sensor with deionized water and place the sensor in the next calibration buffer/standard. 10 Tap Read.

The font of the measurement values turns to light blue.

11 The measurement stops when the endpoint criterion is fulfilled. See [Endpoint criterion Page18].

appears in front of the passed calibration point. 12 Rinse the sensor with deionized water and repeat the steps with all buffers/standards.

A window pops up with calibration data.

13 Tap OK (Adjust) to save the result.

- or Tap Reject to reject the calibration and return to Home screen.

Finalize a Calibration in Advance

If Home screen > Menu > Settings > Analysis settings > Finalize pH calibration at any point is active, a button Calculate will display for the multi-point pH calibration. You can tap it to finalize the calibration in advance.

To finalize the calibration in advance, proceed as follows:

The calibration is a multi-point pH calibration.

At least one calibration point of a multi-point calibration is passed.

1 Tap Calculate. 2 Tap OK (Adjust) to save the result.

- or Tap Reject to reject the calibration and return to Home screen.

The meter will do calibrations in the user-defined order in the active method. If one calibration point fails, you should redo this calibration point and cannot skip it.

However, if Auto buffer recognition of a pH method is active, the meter will automatically recognize the closest calibration point.

5.4 Starting a verification

The latest verification data will be stored into the data of the active sensor.

Ensure that the appropriate buffers/standards have been selected. 1 Select an appropriate method according to [Selecting a method Page16]. 2 Select a sensor if necessary according to [Selecting a sensor Page16]. 3 Tap Verification. 4 Tap Start verification. 5 Enter the lot number if Methods > Verification > Check buffer lot number is active and confirm with OK.

The verification point, sensor name, sensor status and the endpoint type are displayed. 6 Tap Read. 7 The measurement stops when the endpoint criterion is fulfilled. See [Endpoint criterion Page18].

A window pops up with verification data. 8 Tap OK.

5.5 Starting a measurement

1 Select an appropriate method according to [Selecting a method Page16]. 2 Select a sensor if necessary according to [Selecting a sensor Page16]. 3 Tap Sample ID to enter the Sample ID if necessary. 4 Place the sensor in the sample. 5 Tap Read. 6 The measurement stops when the endpoint criterion is fulfilled. See [Endpoint criterion Page18].

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7 Tap Confirm if Menu > Settings > Analysis settings > Confirm end of analysis is active.

5.6 Interrupting analysis

Ongoing analyses can be interrupted anytime.

To interrupt an analysis, proceed as follows:

1 Tap Terminate. 2 Confirm with OK to go back to Home screen.

- or Tap Cancel to continue the analysis.

5.7 Endpoint criterion

The measurement will stop based on the setting in Methods > Measure > Endpoint type.

If Endpoint type is defined as:

Automatic: The measurement will stop automatically, based on the programmed stability criteria. Manual: The measurement will only stop when you tap Manual endpoint. Timed: The measurement will stop after the defined time in Methods > Measure > Endpoint time.

If Home screen > Menu > Settings > Analysis settings > Allow taking of manual endpoint is active, you can also stop the measurement manually by tapping Manual endpoint during the measurement, whatever the

Endpoint type is defined for.

5.8 Measurement status

Measurement Reading

Measurement limit

Inactive font: light blue font: white

Active font: light blue font: red font: white

Temperature Reading

Temperature limit

Inactive font: light blue font: white

Active font: light blue font: red font: white

In progress Endpoint reached

Within limit Out of limit Within limit Out of limit

background: white background: dark blue

background: white background: green background: red

In progress Endpoint reached

Within limit Out of limit Within limit Out of limit

background: white background: dark blue

background: white background: green background: red

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6 Menu

6.1 Logging in and out

Logging in

When the instrument switched on, the system starts up and enters into the Login screen first. You have to log in with your user account before you operate the instrument.

To log in, proceed as follows:

1 Select your user name from the user list on Login screen.

The selected user is highlighted. 2 If your user account has a password, enter the password.

- or If your user account doesn't have the password, you don't need to enter anything.

Enter Home screen.

Logging out

You can log out of the instrument when there is no measurement, calibration, verification or data transfer running.

To log out, proceed as follows:

1 Use the menu handle or tap the menu button to enter

Menu.

2 Tap Log out.

Enter Login screen.

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6.2 Global settings

Navigation: Home screen > Menu > Settings

In Settings, you can make general instrument settings that apply to all users. The settings here can only be changed by users in the Administrator user group.

Note Settings are only applied when confirming with Save.

6.2.1 General

You can view and set date and time, temperature unit, status light and brightness here.

Note Only users in the Administrator user group can change the settings.

Parameter Description Values

Date Sets the current date. -

Date format Defines the format for displaying the date. MM/DD/YYYY | DD/MM/

Time Defines the time format and sets the current time. -

Temperature unit Defines the temperature unit to be shown, stored, transferred and

Status light

Brightness of status light

Glove mode

printed.

Predefined buffer groups and standard lists always use the unit °C as the reference temperature. For customized buffer groups and standard lists, the unit of the temperature depends on the active temperature unit.

Active: The instrument will light up in different colors synchronized with the notification bar.

Green: OK Yellow: Action required Red: Error Flashing Green: Busy

The brightness changes immediately when changing the value from the list.

Displayed if Status light is activated.

Active: The screen sensitivity is increased.

YYY | YYYY/MM/DD | DD-MMM-YYYY

°C | °F

Active | Inactive

20% | 40% | 60% | 80% | 100%

Active | Inactive

6.2.2 Peripherals

You can enable or disable each transfer settings of the meter here.

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Note Only users in the Administrator user group can change the settings.

Parameter Description Values

Transfer to printer

Print after each interval

Transfer to USB memory stick

Transfer to EasyDirect pH

Active: The instrument will do a required resource check before the measurement, calibration and verification.

If there is no printer connected, you cannot do any analysis. If a printer is connected successfully, the result of the measurement, calibration and verification will be printed once the analysis is finished.

Active: The measurement data will be printed out after each interval time which is defined in the activated method > Measure > Interval time, until the measurement is finished.

Displayed if Transfer to printer is activated.

Active: The instrument will do a required resource check before measurement, calibration and verification.

If there is no USB memory stick connected, you cannot do any analysis. If an USB memory stick is connected, the measurement, calibration and verification results will be transferred to the USB memory stick once the analysis is finished.

Active: The instrument will do a required resource check before the measurement, calibration and verification.

If the PC software is not connected, you cannot do any analysis. If the PC software is connected, the result of the measurement, calibration and verification will be transferred to the PC.

6.2.3 Analysis settings

You can set additional analysis settings outside method settings here.

Note Only users in the Administrator user group can change the settings.

Parameter Description Values

Sample ID mandatory

Allow taking of manual endpoint

Confirm end of analysis

Save result on instrument

Range indicator tolerance

Calibration expiry action

Active: A sample ID must be available for each measurement.

If the user attempts to start a measurement and no sample ID is available, an error message appears and the measurement cannot be started.

Active: You can take the endpoint manually by tapping Manual endpoint during the measurement, calibration and verification.

Active: All endpoint results of the measurement, calibration and

verification are shown on screen. The measurement is only completed when Confirm is tapped.

Active: The results of the measurement, calibration and verification are stored in the meter.

Sets a tolerance value for the calibration range which shows in the range indicator for pH measurement mode.

Warn: If Calibration reminder of the active method is activated, the meter gives a warning when using a sensor with an expired calibration. However, you CAN still perform measurements with this sensor.

Warn and Block: If Calibration reminder of the activated method is activated, the meter gives a warning when using a sensor with an expired calibration. In addition, you CANNOT perform measurements with this sensor.

Active | Inactive

0.000…20.000 pH

Warn | Warn and Block

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Parameter Description Values

Verification expiry action

Life span expiration action

Warn: If Verification reminder of the activated method is activated, the meter gives a warning when using a sensor with an expired verification. But you CAN still perform measurements with this sensor.

Warn and Block: If Verification reminder of the activated method is activated, the meter gives a warning when using a sensor with an expired verification. In addition, you CANNOT perform measurements with this sensor.

Warn: If Monitoring life span of the activated sensor is activated, the meter gives a warning when the sensor with an expired life span. But you CAN still perform measurements with this sensor.

Warn and Block: If Monitoring life span of the activated sensor is activated, the meter gives a warning when the sensor with an expired life span. In addition, you CANNOT perform measurements with this sensor.

6.2.4 User settings

User settings contains the settings that can be made specifically for each user.

Parameter Description Values

Language Sets the language for the screen text display. English | German |

Keyboard layout Defines the layout of the alphanumeric input field. English | French |

Screen brightness The brightness changes immediately when changing the value

Screen saver

Wait time

Beep when pushing a button

Beep on error message

Beep on stability signal

Beep on notification

from the list.

Active: The screen will become dark when there is no action on meter during the defined screen save wait time period.

The user can touch any area to light up the screen. When there's a message or system event popup, the screen also will light up.

Displayed if Screen saver is activated.

Active: A beeping sound is played when you tap on the touch screen.

Active: A beeping sound is played when an error message is displayed.

Active: A beeping sound is played when a measurement result is stable.

Active: A beeping sound is played when a notification is displayed.

Warn | Warn and Block

German

10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100%

Active | Inactive

1…120 min

Active | Inactive

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6.3 User management

Navigation: Home screen > Menu > User management

In User management you can manage the settings for user accounts and passwords. A maximum of 30 different users can be defined. Users can be created, deleted and edited.

User can only be managed by users in the appropriate user group.

The instrument has two user group levels. One is Administrator and the other is Operator. The user in Admin- istrator user group has full access rights while the user in the Operator user group has limited access rights. There is a default user with a predefined user name (user name: Administrator, user group: Administrator) that cannot be deleted. It is recommended to change its password after the initial boot.

Note

Only Administrator can view all users while Operator can only view their own. The user which is currently logged in cannot be deleted.

6.3.1 Creating a new user

Only users in the Administrator user group can create a new user.

To create a new user, proceed as follows:

Logged-in user belongs to the user group Administrator.

Enter User management.

1 Tap New. 2 Define User name, Group, Password and Confirm password.

If the user name is repeated, a warning message appears and User name changes to the original one. 3 Tap Save to create the new user.

If Password and Confirm password don't match, an error message appears and the new user cannot be created. You need to change the passwords to be the same.

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Parameter Description Values

User name Defines the user name which uniquely identifies him to the

Group Assignment of the user ID to a user group.

Created on Information on date and time of account creation. -

Created by Information on the administrator logged in at time of account

Password Maximum 32 characters, including upper and lower case letters,

Confirm password

system.

Maximum 14 characters.

Depending on the user group, the user has various rights.

creation.

numbers and symbols.

If they are blank, the user doesn't need to enter a password when logging in.

Double check the password. -

6.3.2 Deleting an user

Only the users in the Administrator user group can delete a user.

The following users cannot be deleted:

The system predefined user 'Administrator'. The current logged-in user.

To delete an user, proceed as follows:

Logged-in user belongs to the user group Administrator.

Enter User management. 1 Use the handle after the user name you want to delete. 2 Tap Delete.

Administrator | Operator

3 Confirm with OK.

The user is removed from the user list.

6.3.3 Changing the password

The users in the Administrator user group can change each user's password. The users in the Operator user group can only change its own password.

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To change the password of the user, proceed as follows:

Enter User management. 1 Tap the user name you want to change. 2 Tap Change password.

3 Enter New password and Confirm password.

Note These two passwords must be the same. 4 Confirm with OK. 5 Tap Save.

Note Changes are only made when confirming with

Save.

If Password and Confirm password don't match, an

error message appears and the password cannot be

changed. You have to change the passwords to be the

same.

You have to use new password to login after logging out or screen saving.

6.3.4 Editing User Group

The users in the Administrator user group can change each user's user group.

To edit a user's user group, proceed as follows:

Logged-in user belongs to the user group Administrator.

Enter User management. 1 Tap the user name you want to change.

Save function is inactive.

2 Change Group from the drop list.

Save function is active.

3 Tap Save.

Note Changes are only made when confirming with

Save.

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6.4 Sensors

Navigation: Home screen > Menu > Sensors

Sensors for pH and redox can be connected to the instrument. One default sensor per sensor type is predefined. Each method can only select the sensors with the matched sensor type.

Sensors can be created, modified and deleted. The usable life and life span of a sensor can be set and monitored. If a sensor is used for an active method, it is highlighted.

SD20 can create a maximum of 10 pH sensors and 10 redox sensors.

Note Digital ISM® sensors are detected automatically.

6.4.1 Creating a sensor

To create a new sensor, proceed as follows:

Logged-in user belongs to the user group Administrator.

Enter Sensors menu.

1 Tap New. 2 Select the measurement mode.

3 Select between the side tab on the left to define

parameters.

4 Tap Save.

Note Changes are only made when confirming with Save.

The new sensor is added into the sensor list.

6.4.2 Deleting a sensor

The following sensors cannot be deleted:

Attached ISM sensors The last sensor of this sensor type

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To delete a sensor, proceed as follows:

Logged-in user belongs to the user group Administrator.

Enter Sensors menu. 1 Use the handle after the sensor that you want to delete. 2 Tap Delete.

3 Confirm with OK.

The sensor is removed from the sensor list.

6.4.3 Editing a sensor

If the sensor is not used in a running measurement, verification or calibration, you can set the name, serial number and life span of this sensor.

Note You cannot edit the name or serial number for an ISM® sensor.

To edit a sensor, proceed as follows:

Logged-in user belongs to the user group Administrator.

Enter Sensors menu. 1 Tap the sensor that you want to edit. 2 Select between the side tab on the left to define

parameters. 3 Tap Save.

Note Changes are only made when confirming with

Save.

6.4.4 pH Sensor Parameters

General

Display and modify the general settings of the sensor.

Parameter Description Values

Sensor type Information on the type of the sensor. pH

Sensor name Defines the name of the sensor.

Maximum 16 characters.

Serial number Defines the serial number of the sensor.

Maximum 12 characters.

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Monitoring life span

Initial operation Defines the initial operation date of the sensor.

Life span Defines the life span of the sensor.

Expiry date Information on the expiry date.

Active: The instrument checks the life span of the sensor at regular intervals and takes action based on Menu > Settings > Analysis settings > Life span expiration action.

Displayed if Monitoring life span is activated.

Calibration

Display the current used calibration data of the sensor. The data is automatically stored after calibration finished successfully. You cannot modify any data here.

Parameter Description Values

Offset Information on offset. -

Slope Information on the slope. -

Calibration procedure

Date / Time of calibration

Calibrated by Information on the user name of the user who performed the

Information on calibration procedure. -

Information on date and time of calibration. -

calibration.

Verification

Display the current used verification data of the sensor. The data is automatically stored after verification finished. You cannot modify any data here.

Parameter Description Values

Verification result Information on the verification result. Pass | Failed

Verification buffer Information on the verification buffer. -

Verification criteria

Method Information on the name of the method which is used for the

Date / Time of verification

Verified by Information on the user name of the user who performed the

Information on the verification criteria. -

verification.

Information on date and time of the verification. -

verification.

6.4.5 Redox Sensor Parameters

General

Display and modify the general settings of the sensor.

Parameter Description Values

Sensor type Information on the type of the sensor. Redox

Sensor name Defines the name of the sensor.

Maximum 16 characters.

Serial number Defines the serial number of the sensor.

Maximum 12 characters.

Active | Inactive

1…100 Month(s)

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Monitoring life span

Initial operation Defines the initial operation date of the sensor.

Life span Defines the life span of the sensor.

Expiry date Information on the expiry date.

Active: The instrument checks the life span of the sensor at regular intervals and takes action based on Menu > Settings > Analysis settings > Life span expiration action.

Displayed if Monitoring life span is activated.

Active | Inactive

1…100 Month(s)

Verification

Display the current used verification data of the sensor. The data is automatically stored after verification finished. You cannot modify any data here.

Parameter Description Values

Verification result Information on the verification result. Pass | Failed

Reference value Information on the reference value. -

Verification criteria

Method Information on the name of the method which is used for the

Date / Time of verification

Verified by Information on the user name of the user who performed the

Information on the verification criteria. -

verification.

Information on date and time of the verification. -

verification.

6.5 Buffers & Standards

Navigation: Home screen > Menu > Buffers & Standards

In Buffers & Standards, you can view all predefined pH buffer groups and view all buffer values at different temperatures. You can neither delete nor edit any predefined buffer group.

If the user group of your user account is Administrator, you can create a maximum of 10 customized buffer groups. You can also modify and delete them.

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6.5.1 Creating customized buffer group / standard list

To create a customized buffer group or standard list, proceed as follows:

Logged-in user belongs to the user group Administrator.

Enter Buffers & Standards menu.

1 Tap New to create a buffer group / standard list.

- or Use the handle after the buffer group / standard list can delete it.

2 Select the measurement mode.

3 Set Name and Reference temperature for the buffer

group / standard list.

4 Tap New to add buffers / standards.

- or Use the handle after the buffers / standards to delete it.

5 Set Name for the buffer / standard.

6 Tap New to add buffer / standard values.

- or Use the handle after the buffer / standard values to delete

it. 7 Tap the field to set the temperature and value. 8 Tap OK to save buffer / standard values. 9 Tap Save to save buffers / standards and the buffer

group / standard list. Note Once the buffer group / standard list is created, the

reference temperature cannot be changed anymore.

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6.6 Maintenance & Service

Navigation: Home screen > Menu > Maintenance & Service

If you are logged in with the user in the Administrator user group, the following functions are available:

Instrument Service Peripheral status Import / Export Update Firmware history Factory Reset

If you are logged in with the user in the Operator user group, you can only view Instrument.

6.6.1 Instrument

Navigation: Home screen > Menu > Maintenance & Service > Instrument

In the screen, you can see the following information of the instrument:

Instrument type Instrument serial number Instrument software version Instrument hardware version Last service date License declaration Open source license

6.6.2 Service

Navigation: Home screen > Menu > Maintenance & Service > Service

In the screen, a list is shown with METTLER TOLEDO maintenance information. Each entry contains information about the date of last maintenance and the user name.

Set service life

Navigation: Home screen > Menu > Maintenance & Service > Service > Settings

Define the parameter for the service life to determine the date of the next maintenance interval. You can set a reminder to be informed on the upcoming maintenance. The following parameters can be set:

Parameter Description Values

Service life Sets the maintenance intervals. 0…750 Day(s)

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Parameter Description Values

Reminder

Days before expiration

Active: A reminder informs about the days before the next maintenance takes place.

Defines how many days before the expiration to inform the reminder.

Days before expiration must be smaller than Reminder.

Displayed if Reminder is activated.

Active | Inactive

0…1000 Day(s)

6.6.3 Peripherals status

Navigation: Home screen > Menu > Maintenance & Service > Peripheral status

In this screen, you can see a list of devices that can be connected to the instrument. You can also check each status of these devices.

The following devices can be checked for connection:

Printer

USB memory stick

Barcode reader

Stirrer

6.6.4 Import / Export

Navigation: Home screen > Menu > Maintenance & Service > Import / Export

In the screen, you can either transfer data to or from USB sticks. Using a Memory copy is an easy way to transfer the settings from one instrument to another. Then quickly you have installed two instruments with identical functions.

The following data can be imported or exported:

Methods

Sensors

Buffers & Standards

User management

Memory copy

Log file

Note

The function Import / Export is only possible when a USB stick is connected and no task is running.

All the saved results, analysis data, METTLER TOLEDO tables and predefined buffer groups / standard lists

are not contained in a memory copy.

When you import or export user management settings, the entire user management settings, with all users

and their properties, will be imported or exported.

You can create and import a backup copy only when you are logged in with the user in the Administrator

user group.

Do not change the filenames of exported files.

When importing a memory copy or user management, the instrument will reboot after the import is

complete.

6.6.5 Update

Navigation: Home screen > Menu > Service > Update

In the screen, you can manage firmware updates of the instrument and modules. Data can be transferred from USB sticks.

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Note

You can implement a firmware update only when you are logged in with the user in the Administrator user group.

METTLER TOLEDO provides additional information for updating instruments. These instructions will be part of the firmware update.

6.6.6 Firmware history

Navigation: Home screen > Menu > Maintenance & Service > Firmware history

You must log in with the user in the Administrator user group to see the screen. In the screen, a list shows all the firmware updates. The first entry on the list corresponds to initial operation.

All list entries show the following information:

Date: The date of the installation. Firmware version: The software version installed.

6.6.7 Factory reset

Navigation: Home screen > Menu > Maintenance & Service > Factory Reset

You must log in with the user in the Administrator user group to see the screen. In the screen, you can reset all instrument settings to factory settings. A pop-up window informs you that all existing data and settings will be deleted.

Note If reset is performed, all created data, amendments, settings, setup entries and results will be lost.

Please create a Memory copy before you reset to factory settings.

To reset to factory settings, proceed as follows:

1 Tap Factory Reset.

2 Tap OK.

3 Tap OK.

The instrument is shutting down and restarts with the First Startup Wizard. All the data is deleted.

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7 Methods

A method combines all parameters for a specific measurement procedure, including its associated calibration and verification. When settings are grouped into methods, it is easy and convenient to switch between the appropriate settings for different applications. It makes sure that no setting is left out.

The instrument predefines a method with default parameters for each measurement mode.

The active method is highlighted.

Note The images in this section show examples of the pH method and can differ from your instrument.

7.1 Adding a new method

To add a new method, proceed as follows:

Enter Methods.

1 Tap New to create a new method. 2 Tap pH or Redox to select the measurement mode.

3 Select between the side tab on the left to define

parameters. 4 Tap Save.

Note Changes are only made when confirming with

Save.

Go back to Home screen.

The active method is updated to the newly created one. Note The maximum number of methods across all method

types is 20.

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7.2 Cloning a method

To clone a method, proceed as follows:

Enter Methods. 1 Select a measurement mode from the side tab on the left. 2 Use the handle after the method to access additional

functions.

3 Tap More.

4 Tap Duplicate.

A new method with the same parameters as the original one appears to be edited.

5 Select between the side tab on the left to define

parameters.

Go back to Home screen.

The active method is updated to the newly created one.

7.3 Deleting a method

To delete a method, proceed as follows:

Enter Methods. 1 Select a measurement mode from the side tab on the left. 2 Use the handle after the method to access additional

functions.

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3 Tap More.

4 Tap Delete. 5 Confirm with OK.

The method disappears from the method list immediately.

Note The activated method cannot be deleted.

7.4 Editing a method

To edit a method, proceed as follows:

Enter Methods. 1 Select a measurement mode from the side tab on the left. 2 Use the handle after the method to access additional

functions. 3 Tap Edit.

4 Select between the side tab on the left to define

parameters. 5 Tap Save.

Note Changes are only made when confirming with

Save.

Go back to Home screen.

The active method is updated to the modified one.

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7.5 Printing a method

To print a method, proceed as follows:

Enter Methods.

A printer is connected successfully. 1 Select a measurement mode from the side tab on the left. 2 Use the handle after the method to access additional

functions.

3 Tap More. 4 Tap Print.

The method details are printed on the connected printer

according to the format defined in Methods > Report >

Print format.

7.6 pH method parameters

General

Parameter Description Values

Measurement type

Method ID Defines the method name which uniquely identifies him to the

Author Information on the administrator logged in at time of the method

Created on Information on date and time of the method creation. -

Modified on Information on date and time of the method modification. -

Modified by Information on the administrator logged in at time of the method

Comment Defines some comments.

Configuration

Parameter Description Values

Sensor Select a sensor from the list of defined sensors if the method

Information on the measurement type. pH

system.

Maximum 30 characters.

creation.

modification.

Maximum 128 characters.

always runs with the same sensor.

Any: You can select any suitable sensor before calibration, verification or measurement.

Any | List of defined sensors

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Temperature capture

Sensor type Select the sensor type.

Temperature Defines the temperature.

Sample ID Defines the sample ID.

Auto sequential sample ID

Select the temperature capture mode.

Sensor: Uses the temperature measured by a connected temperature sensor.

Manual: Uses your input temperature value. Auto-Recognition: Uses automatic temperature correction if a

temperature sensor is connected and manual temperature correction otherwise..

For temperatures below 100 °C, select Auto. For temperatures above 100 °C, select the suitable temperature sensor.

Displayed if Temperature capture = Sensor or Auto-Recog- nition.

Displayed if Temperature capture = Manual or Auto-Recog- nition.

Maximum 30 characters.

Activates auto sequential sample ID. When using auto-sequential sample IDs, the instrument checks whether the last digits of a sample ID are numbers. If yes, the number is increased by 1 for the next measurement. If no, the number 1 is appended to the sample ID for the next measurement.

If this method is reloaded or the instrument is restarted, the sample ID will be reset to the one defined in the method.

Sensor | Manual | AutoRecognition

Auto | NTC 30k | Pt1000

-30.0 °C…130.0 °C |

-22.0 °F…266.0 °F

Active | Inactive

Conditioning

Parameter Description Values

Stir

Stirring time Defines the stir duration.

Stirring speed Select the stir speed.

Wait

Use conditioning for calibration

Active: A stirring period is applied before the measurement and verification starts (after pressing Read).

Displayed if Stir is activated.

Active: Defines the wait time. The wait time is applied after the stirring period of the pre-conditioning, but before the measurement.

Active: Conditioning settings are applied for each calibration point.

Displayed if Stir or Wait is activated.

Active | Inactive

1…1000000 s

10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100%

Active | Inactive

1…1000000 s

Active | Inactive

Calibration

Parameter Description Values

Auto buffer recognition

Active: You can measure buffers in any order during calibration.

Inactive: You need to indicate the buffer order for each calibration point manually.

Active | Inactive

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Parameter Description Values

Buffer(s) Select a buffer for each calibration point from the list. Up to 5

Check buffer lot number

Calibration mode Select the calibration mode.

Stir

Stirring speed Select the stir speed.

Calibration reminder

buffers can be defined. The selected buffer values cannot be the same.

Active: You need to enter a buffer Iot number manually before each calibration point.

Linear: The calibration curve is determined using linear regression.

Segmented: The calibration curve is made up of linear segments joining the individual calibration points.

If the number of the selected buffers is less than 3, the calibration mode can only be Linear. If high accuracy is required,

Segmented is recommended.

Active: A stirring period is applied during the calibration.

Displayed if Stir is activated.

Active: The instrument checks the calibration expiry at regular intervals and takes action based on Menu > Settings > Analysis settings > Calibration expiry action.

Active | Inactive

Linear | Segmented

Active | Inactive

10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100%

Active | Inactive

1…9999 Hour(s) | 1… 400 Day(s)

Measure

Parameter Description Values

Unit Select the unit of the measured value. pH | mV

Decimal places The values depend on the defined unit. -

Endpoint type Select the endpoint type.

Automatic: The instrument determines when a measurement is to be stopped, based on the programmed stability criteria.

Manual: You need to stop the measurement manually. Timed: The instrument stops the measurement after a defined

time.

Endpoint time Defines the time after which the instrument stops the

Stability criteria Select the stability criteria.

Stir

Stirring speed Select the stir speed.

Limits

measurement.

Displays if Endpoint type = Timed.

See [Stability criteria Page44] for details.

Active: A stirring is applied during the measurement and verification.

Displayed if Stir is activated.

Active: The upper and lower limits for the measurement result can be defined.

If the measurement result is either less than the lower limit or more than the upper limit, a warning is displayed on the screen.

Automatic | Manual | Timed

1…1000000 s

Strict | Standard | Fast

Active | Inactive

10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100%

Active | Inactive

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Lower limit Defines the lower limit of the measurement result. The limit range

Upper limit Defines the upper limit of the measurement result. The limit range

Lower temp. limit Defines the lower limit of the temperature. The limit range is same

Upper temp. limit Defines the upper limit of the temperature. The limit range is

Interval reading

Interval time Defines the time difference between two recorded measurement

is same as the measurement range.

Active: The instrument will display a warning when the measurement result is less than the lower limit.

Inactive: The instrument will not display a warning because of the lower result limit.

is same as the measurement range. The upper limit value should be larger than lower limit value.

Active: The instrument will display a warning when the measurement result is more than the upper limit.

Inactive: The instrument will not display a warning because of the upper result limit.

as the measurement range.

Active: The instrument will display a warning if the measured temperature is less than the lower temperature limit.

Inactive: The instrument will not display a warning because of the lower temperature limit.

same as the measurement range. The upper limit value should be larger than lower limit value.

Active: The instrument will display a warning if the measured temperature is more than the upper temperature limit.

Inactive: The instrument will not display a warning because of the upper temperature limit.

Active: The instrument records a measured value as a result at defined time intervals until the measurement is finished.

Not recommended if Endpoint type is Automatic.

values for interval measurements.

Displayed if Interval reading is activated.

Active | Inactive

1…1000000 s

Verification

Parameter Description Values

Buffer(s) Select a buffer from the list of defined buffers. -

Verification criteria

Check buffer lot number

Verification reminder

Defines the verification criteria. 0.001…1.000 pH

Active: You need to enter the Iot number manually at the start of verification process.

Active: The instrument checks the verification expiry at regular intervals and takes action based on Menu > Settings > Analysis settings > Verification expiry action.

Active | Inactive

1…9999 Hour(s) | 1… 400 Day(s)

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Report

Parameter Description Values

Print format Select the format of the report.

Short: Prints a summary of the measurement result. Standard: Prints full measurement results. GLP: Prints detailed measurement result and method infor-

mation.

7.7 Redox method parameters

General

Parameter Description Values

Measurement type

Method ID Defines the method name which uniquely identifies him to the

Author Information on the administrator logged in at time of the method

Created on Information on date and time of the method creation. -

Modified on Information on date and time of the method modification. -

Modified by Information on the administrator logged in at time of the method

Comment Defines some comments.

Configuration

Parameter Description Values

Sensor Select a sensor from the list of defined sensors if the method

Temperature capture

Temperature Defines the temperature.

Sample ID Defines the sample ID.

Information on the measurement type. Redox

system.

Maximum 30 characters.

creation.

modification.

Maximum 128 characters.

always runs with the same sensor.

Any: You can select any suitable sensor before calibration, verification or measurement.

Select the temperature capture mode.

Sensor: Uses the temperature measured by a connected temperature sensor.

Manual: Uses your input temperature value. Auto-Recognition: Uses automatic temperature correction if a

temperature sensor is connected and manual temperature correction otherwise..

Displayed if Temperature capture = Manual or Auto-Recog- nition.

Maximum 30 characters.

Short | Standard | GLP

Any | List of defined sensors

Sensor | Manual | AutoRecognition

-30.0 °C…130.0 °C |

-22.0 °F…266.0 °F

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Auto sequential sample ID

Conditioning

Parameter Description Values

Stir

Stirring time Defines the stir duration.

Stirring speed Select the stir speed.

Wait

Measure

Parameter Description Values

Unit Select the unit of the measured value. mV | Rel.mV

Offset

Decimal places The values depend on the defined unit. -

Endpoint type Select the endpoint type.

Endpoint time Defines the time after which the instrument stops the

Stability criteria Select the stability criteria.

Stir

Stirring speed Select the stir speed.

Limits

If this method is reloaded or the instrument is restarted, the sample ID will be reset to the one defined in the method.

Active: A stirring period is applied before the measurement and verification starts (after pressing Read).

Displayed if Stir is activated.

Active: Defines the wait time. The wait time is applied after the stirring period of the pre-conditioning, but before the measurement.

Displayed if Unit = Rel.mV.

Automatic: The instrument determines when a measurement is to be stopped, based on the programmed stability criteria.

Manual: You need to stop the measurement manually. Timed: The instrument stops the measurement after a defined

time.

measurement.

Displays if Endpoint type = Timed.

See [Stability criteria Page44] for details.

Active: A stirring is applied during the measurement and verification.

Displayed if Stir is activated.

Active: The upper and lower limits for the measurement result can be defined.

If the measurement result is either less than the lower limit or more than the upper limit, a warning is displayed on the screen.

Active | Inactive

1…1000000 s

10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100%

Active | Inactive

1…1000000 s

-2000.0…2000.0 mV

Automatic | Manual | Timed

1…1000000 s

Strict | Standard | Fast

Active | Inactive

10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100%

Active | Inactive

Methods42 SevenDirect™ SD20

Page 45

Lower limit Defines the lower limit of the measurement result. The limit range

Upper limit Defines the upper limit of the measurement result. The limit range

Lower temp. limit Defines the lower limit of the temperature. The limit range is same

Upper temp. limit Defines the upper limit of the temperature. The limit range is

Interval reading

Interval time Defines the time difference between two recorded measurement

Verification

Parameter Description Values

Reference value Defines the reference value. -500…500 mV

Verification criteria

Verification reminder

Report

Parameter Description Values

Print format Select the format of the report.

is same as the measurement range.

Active: The instrument will display a warning when the measurement result is less than the lower limit.

Inactive: The instrument will not display a warning because of the lower result limit.

is same as the measurement range. The upper limit value should be larger than lower limit value.

Active: The instrument will display a warning when the measurement result is more than the upper limit.

Inactive: The instrument will not display a warning because of the upper result limit.

as the measurement range.

Active: The instrument will display a warning if the measured temperature is less than the lower temperature limit.

Inactive: The instrument will not display a warning because of the lower temperature limit.

same as the measurement range. The upper limit value should be larger than lower limit value.

Active: The instrument will display a warning if the measured temperature is more than the upper temperature limit.

Inactive: The instrument will not display a warning because of the upper temperature limit.

Active: The instrument records a measured value as a result at defined time intervals until the measurement is finished.

Not recommended if Endpoint type is Automatic.

values for interval measurements.

Displayed if Interval reading is activated.

Defines the verification criteria. -500…500 mV

Active: The instrument checks the verification expiry at regular intervals and takes action based on Menu > Settings > Analysis

settings > Verification expiry action.

Short: Prints a summary of the measurement result. Standard: Prints full measurement results. GLP: Prints detailed measurement result and method infor-

mation.

Active | Inactive

1…1000000 s

Active | Inactive

1…9999 Hour(s) | 1… 400 Day(s)

Short | Standard | GLP

Methods 43SevenDirect™ SD20

Page 46

7.8 Stability criteria

Measurement Type

pH or Redox Value varies less than 0.03 mV

Stability criteria

Strict Standard Fast

during the last 8 seconds or

0.1 mV for the last 20 seconds.

Value varies less than 0.1 mV during the last 6 seconds.

Value varies less than 0.6 mV during the last 4 seconds.

Methods44 SevenDirect™ SD20

Page 47

8 Result

Navigation: Home screen > Results fly-in > List

The instrument can save up to 2000 standard results. If the maximum number of results is reached, older results are deleted. In case of large data sets, the total number of results may be reduced and multiple older results may be deleted. For safe long term data storage, it is recommended to maintain your data separately from the instrument, such as on printouts or by exporting to the EasyDirectTM pH PC software.

The results are divided into several categories by the tab in the left.

All: show all results in a list, including the measurement, calibration and verification.

pH: show pH measurement results in a list.

Redox: show redox measurement results in a list.

Calibration: show calibration results in a list.

Verification: show verification results in a list.

Two columns of result data are displayed in the result list. You can tap the name of the column to sort the results.

Tap the result row you can see the details of the result.

Selecting data to display

You can select the following data to display in a result list:

Date / Time: default

Method ID

Sample ID

Result value: default

Result status

User name

To select the data to display, proceed as follows:

Enter a result list category.

1 Tap Columns. 2 Use the drop down list to select which data to display in

the first column. 3 Use the drop down list to select which data to display in

the second column. 4 Confirm with OK.

Only the columns of the current result list changes.

Result 45SevenDirect™ SD20

Page 48

Filtering results

To filter result, proceed as follows:

Enter a result list category.

1 Tap Filter. 2 Enter the data you want to be filtered and confirm with

OK.

- or -

3 Tap Clear filter to show all results.

Note

You are only able to filter according to the visible columns in the result list.

Column Result value cannot set filter.

Exporting a result

To export the result that you want to export, proceed as follows:

Enter a result list category. 1 Use the handle after the result that you want to export. 2 Tap More.

- or 3 Tap the result that you want to export. 4 Tap Export.

5 Select a device to export to. 6 Confirm with OK.

The result is stored in the device.

Exporting all results

To export all results, proceed as follows:

Enter a result list category.

1 Tap Export all to export multiple results.

Result46 SevenDirect™ SD20

Page 49

2 Select a device to export to. 3 Confirm with OK.

All results are stored in the device.

Note If tapped Export all, only the results displayed on the current result list can be export. For example, if you set a filter and then tap Export all, the results that are filtered out are not exported.

Deleting a result

To delete a result that you want to delete, proceed as follows:

Enter a result list category.

1 Use the handle after the result that you want to delete.

- or 2 Tap the result that you want to delete. 3 Tap Delete.

4 Confirm with OK.

This result is removed from the result list category.

Deleting all results

To delete all results, proceed as follows:

Enter a result list category.

1 Tap Delete all results to delete multiple results. 2 Confirm with OK.

The result list category is empty.

Note If tapped Delete all results, only the results displayed on the current result list can be deleted. For example, if you set a filter and then tap Delete all results the results filtered out are not deleted.

Result 47SevenDirect™ SD20

Page 50

Print a result

To print a result that you want to print, proceed as follows:

1 Use the handle after the result that you want to print. 2 Tap More.

3 Select Print.

A new line with Format pops up. 4 Select a format. 5 Confirm with OK.

8.1 Results fly-in

The newest 7 results are displayed in Results fly-in sorted by date / time ascending, with the latest result at the top of the list.

Result48 SevenDirect™ SD20

Page 51

There are 2 lines in a result. Tap a result and you can see the details about the result quickly.

# Description

1 For measurement

Sample ID Time for today's results if no Sample ID is entered Date for old results if no Sample ID is entered "…" if the Sample ID is too long

For calibration

pH calibration / cond. calibration / Ion calibration

For verification

pH verification / cond. verification / Ion verification / redox verification

2 The result of the measurement, calibration or verification.

Only the result of the first segment is visible.

3 The color bar changes if limits of measurement results

are activated or for verification results.

Red

Measurement value outside limits Verification value failed to fulfill criteria

Green

Measurement value within limits Verification value fulfill criteria

Blue

No limit is used for measurement All accepted calibration results are blue

Yellow

Rejected calibration result Terminated measurement result Rejected verification result

Rejection or termination of a calibration result takes precedence over the measurement limits. Therefore, yellow color will be shown instead of red or green if multiple options are applicable.

8.2 Result details

Different result types store different details. The main parts are as follows.

Settings: Displays the most important settings for the analysis. Data: Displays the data of buffers/standards, stable status and time. Result: Displays the result status and the information of analysis result. Resource: Displays the information of the sensor. Interval: Visible when the method uses Interval reading. Displays the list of each interval reading. Table: Visible for calibration results. Displays the list of calibration points.

8.2.1 Result Reason & Result Status

If more than one status applies, the result shows the higher status level. Result status level (from low to high) is OK < OK* < Failed < Error. If more than one error occurred, the instrument shows all of them as Result reason.

Result 49SevenDirect™ SD20

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If none of the below criteria applies, the result status is 'OK'.

Result reason Result Status

For measurement For calibration For verification

Calibration expired OK* - OK*

Verification expired OK* - -

No valid verification OK* - -

Out of calibration range (pH only) OK* - OK*

Out of measurement range Failed Failed Failed

Out of measurement limits Failed - -

Out of temperature limits Failed - -

Slope out of range - Failed -

Offset out of range - Failed -

Terminated Error Error Error

Sensor removed (ISM) Error Error Error

Resource lost Error Error Error

System problem Error Error Error

Result50 SevenDirect™ SD20

Page 53

9 Maintenance and Care

Do not open the housing of the instrument; it does not contain any parts that can be maintained, repaired or replaced by the user. If you experience problems with your instrument, contact your authorized METTLER TOLEDO dealer or service representative.

▶ www.mt.com/contact

Note: It is recommended to restart the instrument periodically for optimal performance.

9.1 Cleaning the Instrument

NOTICE

Danger of damage to the instrument due to inappropriate cleaning agents!

The housing is made of acrylonitrile butadiene styrene/polycarbonate (ABS/PC). This material is sensitive to some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). If liquids enter the housing they can damage the instrument.

1 Use only water and a mild detergent to clean the housing. 2 Wipe off any spills immediately.

The instrument is turned off and disconnected from the electrical outlet. Clean the housing of the instrument using a cloth dampened with water and a mild detergent.

If you have questions about the compatibility of cleaning agents, contact your authorized METTLER TOLEDO dealer or service representative.

u www.mt.com/contact

9.2 Maintenance of electrodes

The instrument monitors the condition of the attached pH electrodes.

Slope: 95-105% and offset: ± (0-20) mV Electrode is in good condition

When cleaning, always follow the instructions in the manual of the electrodes used. Make sure the pH electrode is always kept filled with the appropriate filling solution. For maximum accuracy, any filling solution that may have "crept" and encrusted the outside of the electrode should be removed with deionized water. Always store the electrode according to the manufacturer’s instructions and do not allow it to dry out.

If the electrode slope falls rapidly, or if the response becomes sluggish, the following procedures may help. Try one of the following, depending on your sample.

Problem Action

Fat or oil build-up Either rinse the membrane with soap solution or acetone/ethanol

pH electrode membrane has dried out Soak the tip of the electrode overnight in 0.1mol/LHCl.

Protein build-up in the diaphragm of a pH electrode

Silver sulfide contamination of pH electrode Remove deposits by soaking the electrode in a thiourea solution.

Run a new calibration after treatment.

Slope: 90-94% or offset: ± (20-35) mV Electrode needs cleaning

or shortly soak the tip of the electrode in warm water. When rinsed with organic solvent, place the membrane overnight in

0.1mol/LHCl.

If this procedure has no effect, soak the tip of the electrode for a few minutes in reactivation solution for pH electrodes.

Remove deposits by soaking the electrode in an HCl/pepsin solution for few hours or overnight.

Slope: 85-89% or offset: ± (>35) mV Electrode is defective or too old

Maintenance and Care 51SevenDirect™ SD20

Page 54

Note

Cleaning and filling solutions should be handled with the same care as that given to toxic or corrosive substances.

9.3 Transporting the instrument

Note the following instructions when transporting the instrument to a new location:

Transport the instrument with care to avoid damage! The instrument may be damaged if not transported correctly.

Unplug the instrument and remove all connected cables. Remove the electrode arm. To avoid damage to the instrument when transporting it over long distances, please use the original

packaging. If the original packaging is no longer available, choose packaging that will ensure safe handling.

9.4 Disposal

In conformance with the European Directive 2012/19/EU on Waste Electrical and Electronic Equipment (WEEE) this device may not be disposed of in domestic waste. This also applies to countries outside the EU, per their specific requirements.

Please dispose of this product in accordance with local regulations at the collecting point specified for electrical and electronic equipment. If you have any questions, please contact the responsible authority or the distributor from which you purchased this device. Should this device be passed on to other parties, the content of this regulation must also be related.

Maintenance and Care52 SevenDirect™ SD20

Page 55

10 Sensors, Solutions and Accessories

pH Sensors

Parts Order No.

ISM® sensors with MultiPin™ head

InLab®Micro Pro-ISM, 3-in-1 pH sensor, glass shaft, 5 mm shaft diameter, ATC, refillable

InLab®Power Pro-ISM, 3-in-1 pH sensor, glass shaft, ATC, pressurized SteadyForce™ reference system

InLab®Pure Pro-ISM, 3-in-1 pH sensor, glass shaft, immovable glass sleeve, ATC, refillable

InLab®Routine Pro-ISM, 3-in-1 pH sensor, glass shaft, ATC, refillable 51344055

InLab®Science Pro-ISM, 3-in-1 pH sensor, glass shaft, movable glass sleeve, ATC, refillable

InLab®Solids Pro-ISM, 3-in-1 pH sensor, glass shaft, open junction, sharp membrane, ATC

pH solutions

Solutions Order No.

pH 2.00 buffer sachets, 30 x 20mL 30111134

pH 2.00 buffer solution, 250mL 51350002

pH 2.00 buffer solution, 6 x 250mL 51350016

pH 4.01 buffer sachets, 30 x 20mL 51302069

pH 4.01 buffer solution, 250mL 51350004

pH 4.01 buffer solution, 6 x 250mL 51350018

pH 7.00 buffer sachets, 30 x 20mL 51302047

pH 7.00 buffer solution, 250mL 51350006

pH 7.00 buffer solution, 6 x 250mL 51350020

pH 9.21 buffer sachets, 30 x 20mL 51302070

pH 9.21 buffer solution, 250mL 51350008

pH 9.21 buffer solution, 6 x 250mL 51350022

pH 10.01 buffer sachets, 30 x 20mL 51302079

pH 10.00 buffer solution, 250mL 51350010

pH 10.00 buffer solution, 6 x 250mL 51350024

pH 11.00 buffer sachets, 30 x 20mL 30111135

pH 11.00 buffer solution, 250mL 51350012

pH 11.00 buffer solution, 6 x 250mL 51350026

Rainbow sachets I (10 sachets of pH 4.01 / 7.00 / 9.21) 51302068

Rainbow sachets II (10 sachets of pH 4.01 / 7.00 / 10.01) 51302080

Rainbow bottles I (2 x 250 mL of pH 4.01 / 7.00 / 9.21) 30095312

Rainbow bottles II (2 x 250 mL of pH 4.01 / 7.00 / 10.00) 30095313

InLab storage solution (for all InLab pH and redox electrodes), 250mL 30111142

Electrolyte 3mol/L KCl, 25mL 51343180

Electrolyte 3mol/L KCl, 250mL 51350072

51344163

51344211

51344172

51344072

51344155

Sensors, Solutions and Accessories 53SevenDirect™ SD20

Page 56

Solutions Order No.

Electrolyte 3mol/L KCl, 6 x 250mL 51350080

HCl/Pepsin solution (removes protein contamination), 250mL 51350100

Thiourea solution (removes silver sulfide contamination), 250mL 51350102

Regeneration solution for pH electrodes, 25mL 51350104

Conductivity sensors

Parts Order No.

InLab®731-ISM 30014092

InLab®741-ISM (steel) 30014094

InLab®710 (glass) 51302256

InLab®720 (glass) 51302255

InLab®751-4mm (narrow shaft) 51344030

Conductivity solutions

Parts Order No.

10 μS/cm conductivity standard solution, 250 mL 51300169

84 μS/cm conductivity standard solution, 250 mL 51302153

84 μS/cm conductivity standard solution, 30 x 20 mL sachets 30111140

500 μS/cm conductivity standard solution, 250 mL 51300170

1413 μS/cm conductivity standard solution, 30 x 20 mL sachets 51302049

1413 μS/cm conductivity standard solution, 6 x 250 mL 51350096

12.88 mS/cm conductivity standard solution, 30 x 20 mL sachets 51302050

12.88 mS/cm conductivity standard solution, 6 x 250 mL 51350098

Sensors, Solutions and Accessories54 SevenDirect™ SD20

Page 57

11 Technical Data

General

Ambient conditions

Standards for safety and EMC

Power rating instrument

Power rating AC adapter

pH measurement

Measurement range

Color TFT

Screen

Interfaces

Dimensions

Materials

Resolution

Accuracy

Isopotential point

USB-A USB-Stick (FAT12/FAT16/FAT32)/

USB-B Computer

Ambient temperature 5…40 °C

Relative humidity 5…80% (non-condensing)

Overvoltage category Class II

Pollution degree 2

Range of application For indoor use only

Maximum operating altitude Up to 5000 m

See Declaration of Conformity

Width 195 mm

Depth 205 mm

Height 65 mm

Weight 850 g

Input voltage 12 V

Maximum power consumption 11 W

Line voltage 100 - 240V ±10 %

Input frequency 50/60 Hz

Input current 0.5 A

Output voltage 12 V

Output current 1.5 A

Housing ABS/PC reinforced

Window Glass

pH -2.000…20.000

mV -2000.0…2000.0

Temperature -30.0…130.0 °C

pH 0.1/0.01/0.001

mV 1/0.1

Temperature 0.1 °C

pH ±0.002

mV ±0.1 (-500.0…500.0 mV)

Temperature ±0.1°C (0.0…100.0 °C)

pH 7.00

pH input BNC, impedance > 3 · 1012 Ω

Printer/barcode reader

±0.2 (< -500.0 mV or > 500.0 mV)

±0.3°C (< 0.0 °C or > 100.0 °C)

Technical Data 55SevenDirect™ SD20

Page 58

Temperature input

Calibration (pH)

Redox measurement

Measurement range

Resolution

Accuracy

mV input BNC, impedance > 3 · 1012 Ω

Temperature input

RCA (Cinch) NTC 30kΩ or PT1000

Calibration points 1…5

Predefined buffer groups 11

User-defined buffer groups 10

Automatic buffer recognition Yes

Calibration methods Linear, segmented

mV -2000.0…2000.0 mV

rel.mV -2000.0…2000.0

Temperature -30…130 °C

mV 1/0.1

rel.mV 1/0.1

Temperature 0.1 °C

mV ± 0.1 (-500…500 mV)

Temperature ± 0.1 °C (0.0…100.0 °C)

RCA (Cinch) NTC 30kΩ or PT1000

± 0.2 (< -500 mV or > 500 mV)

± 0.3 °C (< 0.0 °C or > 100.0 °C)

Technical Data56 SevenDirect™ SD20

Page 59

12 Appendix

12.1 Predefined buffers

Note: If you intend to connect ISM sensors calibrated on SevenDirect to other meters, it is recommended to use

the buffer groups MT USA, MT Europe or technical for traceability. Otherwise, the combined METTLER TOLEDO buffer group offers the greatest convenience.

METTLER TOLEDO (Ref. 25°C) USA & Europe & Technical

T [°C] 1.68 2.00 4.01 5.00 7.00 8.00 9.21 10.00 10.01 11.00

0.0 1.67 2.03 4.01 5.04 7.12 8.07 9.52 - 10.32 11.9

5.0 1.67 2.02 4.01 5.03 7.09 8.06 9.45 10.65 10.25 11.72

10.0 1.67 2.01 4.00 5.02 7.06 8.07 9.38 10.39 10.18 11.54

15.0 1.67 2.00 4.00 5.01 7.04 8.04 9.32 10.26 10.12 11.36

20.0 1.68 2.00 4.00 5.00 7.02 8.02 9.26 10.13 10.06 11.18

25.0 1.68 2.00 4.01 5.00 7.00 8.00 9.21 10.00 10.01 11.00

30.0 1.68 1.99 4.01 5.01 6.99 7.98 9.16 9.87 9.97 10.82

35.0 1.69 1.99 4.02 5.01 6.98 7.95 9.11 9.74 9.93 10.64

40.0 1.69 1.98 4.03 5.03 6.97 7.94 9.06 9.61 9.89 10.46

45.0 1.70 1.98 4.04 5.05 6.97 7.91 9.03 9.48 9.86 10.28

50.0 1.71 1.98 4.06 5.06 6.97 7.90 8.99 9.35 9.83 10.10

55.0 1.72 1.98 4.08 5.08 6.98 7.89 8.96 - - -

60.0 1.72 1.98 4.10 5.11 6.98 7.86 8.93 - - -

65.0 - 1.98 4.13 5.14 6.99 7.88 - - - -

70.0 1.74 1.99 4.16 5.17 7.00 7.87 8.88 - - -

75.0 - 1.99 4.19 5.20 7.02 7.86 - - - -

80.0 1.77 2.00 4.22 5.23 7.04 7.85 8.83 - - -

85.0 - 2.00 4.26 5.26 7.06 7.86 - - - -

90.0 1.79 2.00 4.30 5.29 7.09 7.87 8.79 - - -

95.0 1.81 2.00 4.35 5.32 7.12 7.87 8.77 - - -

Appendix 57SevenDirect™ SD20

Page 60

DIN(19266)/NIST (Ref. 25°C)

T [°C] 1.679 3.557 3.776 4.005 6.865 7.413 9.180 10.012 12.454

0.0 1.666 - 3.865 4.000 6.984 7.534 9.464 10.317 -

5.0 1.668 - 3.840 3.998 6.951 7.500 9.395 10.245 13.207

10.0 1.670 - 3.820 3.997 6.923 7.472 9.332 10.179 13.003

15.0 1.672 - 3.802 3.998 6.900 7.448 9.276 10.118 12.810

20.0 1.675 - 3.788 4.000 6.881 7.429 9.225 10.062 12.627

25.0 1.679 3.557 3.776 4.005 6.865 7.413 9.180 10.012 12.454

30.0 1.683 3.552 3.766 4.011 6.853 7.400 9.139 9.966 12.289

35.0 1.688 3.549 3.759 4.018 6.844 7.389 9.102 9.926 12.133

37.0 - 3.548 3.756 4.022 6.841 7.386 9.088 9.910 -

38.0 1.691 - - - - - - - 12.043

40.0 1.694 3.547 3.754 4.027 6.838 7.380 9.068 9.889 11.984

45.0 - - - - - - - - 11.841

50.0 1.707 3.549 3.749 4.050 6.833 7.367 9.011 9.828 11.705

JJG119 (Chinese) (Ref. 25°C)

T [°C] 1.680 3.559 3.776 4.003 6.864 7.413 7.699 9.182 10.012 12.460

0.0 1.668 - 3.863 4.006 6.981 7.534 8.471 9.458 10.317 13.416

5.0 1.669 - 3.840 3.999 6.949 7.500 8.303 9.391 10.245 13.210

10.0 1.671 - 3.820 3.996 6.921 7.472 8.142 9.330 10.179 13.011

15.0 1.673 - 3.802 3.996 6.898 7.448 7.988 9.276 10.118 12.820

20.0 1.676 - 3.788 3.998 6.879 7.429 7.840 9.226 10.062 12.637

25.0 1.680 3.559 3.776 4.003 6.864 7.413 7.699 9.182 10.012 12.460

30.0 1.684 3.551 3.766 4.010 6.852 7.400 7.563 9.142 9.966 12.292

35.0 1.688 3.547 3.759 4.019 6.844 7.389 7.433 9.105 9.926 12.130

37.0 1.694 3.547 3.756 4.022 6.839 7.386 7.382 - 9.910 12.069

40.0 1.694 3.547 3.754 4.029 6.838 7.380 7.307 9.072 9.889 11.975

45.0 1.700 3.550 - 4.042 6.834 - 7.186 9.042 - 11.828

50.0 1.706 3.555 3.749 4.055 6.833 7.367 7.070 9.015 9.828 11.697

55.0 1.713 3.563 - 4.070 6.834 - - 8.990 - 11.553

60.0 1.721 3.573 - 4.087 6.837 - - 8.968 - 11.426

70.0 1.739 3.596 - 4.122 6.847 - - 8.926 - -

80.0 1.759 3.622 - 4.161 62 - - 8.890 - -

90.0 1.782 3.648 - 4.203 6.881 - - 8.856 - -

95.0 1.795 3.660 - 4.224 6.891 - - 8.839 - -

Appendix58 SevenDirect™ SD20

Page 61

MERCK (Ref. 20°C)

T [°C] 2.00 4.00 7.00 9.00 12.00

5.0 2.01 4.05 7.07 9.16 12.41

10.0 2.01 4.03 7.05 9.11 12.26

15.0 2.00 4.02 7.02 9.05 12.10

20.0 2.00 4.00 7.00 9.00 12.00

25.0 2.00 3.99 6.98 8.95 11.88

30.0 2.00 3.98 6.98 8.91 11.72

35.0 2.00 3.98 6.96 8.88 11.67

40.0 2.00 3.98 6.95 8.85 11.54

45.0 2.00 3.98 6.95 8.82 11.44

50.0 2.00 3.98 6.95 8.79 11.33

DIN(19267) (Ref. 25°C)

T [°C] 1.09 3.06 4.65 6.79 9.23 12.75

0.0 1.08 - 4.67 6.89 9.48 -

10.0 1.09 3.10 4.66 6.84 9.37 13.37

20.0 1.09 3.07 4.65 6.80 9.27 12.96

25.0 1.09 3.06 4.65 6.79 9.23 12.75

30.0 1.10 3.05 4.65 6.78 9.18 12.61

40.0 1.10 3.04 4.66 6.76 9.09 12.29

50.0 1.11 3.04 4.68 6.76 9.00 11.98

60.0 1.11 3.04 4.70 6.76 8.92 11.69

70.0 1.11 3.04 4.72 6.76 8.88 11.43

80.0 1.12 3.05 4.75 6.78 8.85 11.19

90.0 1.13 3.07 4.79 6.80 8.82 10.99

Appendix 59SevenDirect™ SD20

Page 62

GB/T(27501) (Ref. 25°C)

T [°C] 1.680 3.559 4.003 6.864 9.182 12.460

0.0 1.668 - 4.006 6.981 9.458 13.416

5.0 1.669 - 3.999 6.949 9.391 13.210

10.0 1.671 - 3.996 6.921 9.330 13.011

15.0 1.673 - 3.996 6.898 9.276 12.820

20.0 1.676 - 3.998 6.879 9.226 12.637

25.0 1.680 3.559 4.003 6.864 9.182 12.460

30.0 1.684 3.551 4.010 6.852 9.142 12.292

35.0 1.688 3.547 4.019 6.844 9.105 12.130

40.0 1.694 3.547 4.029 6.838 9.072 11.975

45.0 1.700 3.550 4.042 6.834 9.042 11.828

50.0 1.706 3.555 4.055 6.833 9.015 11.697

55.0 1.713 3.563 4.070 6.834 8.990 11.553

60.0 1.721 3.573 4.087 6.837 8.968 11.426

70.0 1.739 3.596 4.122 6.847 8.926 -

80.0 1.759 3.622 4.161 6.862 8.890 -

90.0 1.782 3.648 4.203 6.881 8.856 -

95.0 1.795 3.660 4.224 6.891 8.839 -

JISZ882(Japanese)

T [°C] 1.679 4.008 6.865 9.180

5.0 1.668 3.999 6.951 9.395

10.0 1.670 3.998 6.923 9.332

15.0 1.672 3.999 6.900 9.276

20.0 1.675 4.002 6.881 9.225

25.0 1.679 4.008 6.865 9.180

30.0 1.683 4.015 6.853 9.139

35.0 1.688 4.024 6.844 9.102

40.0 1.694 4.035 6.838 9.068

45.0 1.700 4.047 6.834 9.038

50.0 1.707 4.060 6.833 9.011

Appendix60 SevenDirect™ SD20

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ChP 2020 (Ref. 25°C)

T [°C] 1.68 4.01 6.68 9.18 12.45

0.0 1.67 4.01 6.98 9.46 13.43

5.0 1.67 4.00 6.95 9.40 13.21

10.0 1.67 4.00 6.92 9.33 13.00

15.0 1.67 4.00 6.90 9.27 12.81

20.0 1.68 4.00 6.88 9.22 12.63

25.0 1.68 4.01 6.68 9.18 12.45

30.0 1.68 4.01 6.85 9.14 12.30

35.0 1.69 4.02 6.84 9.10 12.14

40.0 1.69 4.04 6.84 9.06 11.98

45.0 1.70 4.05 6.83 9.04 11.84

50.0 1.71 4.06 6.83 9.01 11.71

55.0 1.72 4.08 6.83 8.99 11.57

60.0 1.72 4.09 6.84 8.96 11.45

12.2 Predefined standards

International

T [°C] 10 µS/cm 84 µS/cm 500 µS/cm 1413 µS/cm 12.88 mS/cm

5.0 6.13 53.02 315.3 896 8.22

10.0 7.10 60.34 359.6 1020 9.33

15.0 7.95 67.61 402.9 1147 10.48

16.0 8.15 69.25 - - -

17.0 8.36 70.89 - - -

18.0 8.56 72.52 - - -

19.0 8.77 74.16 - - -

20.0 8.97 75.80 451.5 1278 11.67

21.0 9.18 77.44 - - -

22.0 9.38 79.08 - - -

23.0 9.59 80.72 - - -

24.0 9.79 82.36 - - -

25.0 10.00 84.00 500.0 1413 12.88

30.0 11.03 92.19 548.5 1552 14.12

35.0 12.14 100.92 602.5 1696 15.39

40.0 13.29 109.21 - - -

45.0 14.44 118.05 - - -

50.0 15.55 126.80 - - -

Appendix 61SevenDirect™ SD20

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Chinese

T [°C] 146.5 µS/cm 1408 µS/cm 12.85 mS/cm 111.3 mS/cm

15.0 118.5 1141.4 10.455 92.12

18.0 126.7 1220.0 11.163 97.80

20.0 132.2 1273.7 11.644 101.70

25.0 146.5 1408.3 12.852 111.31

35.0 176.5 1687.6 15.353 131.10

Japanese Standards

T [°C] 1330 µS/cm 133.0 µS/cm 26.6 µS/cm

0.0 771.40 77.14 15.428

5.0 911.05 91.11 18.221

10.0 1050.70 105.07 21.014

15.0 1190.35 119.04 23.807

20.0 1330.00 133.00 26.600

25.0 1469.65 146.97 29.393

30.0 1609.30 160.93 32.186

35.0 1748.95 174.90 34.979

Saturated NaCl

T [°C] 251.3 mS/cm

5.0 155.5

10.0 177.9

15.0 201.5

20.0 226.0

25.0 251.3

30.0 277.4

35.0 304.1

METTLER TOLEDO ION

T [°C] 0.1 mg/L 1 mg/L 10 mg/L 100 mg/L 1000 mg/L

20.0 0.1 1 10 100 1000

25.0 0.1 1 10 100 1000

30.0 0.1 1 10 100 1000

Appendix62 SevenDirect™ SD20

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Page 66

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