pH Meter/Conductometer
912 Conductometer | 913 pH Meter | 914 pH/Conductometer
Manual
8.912.8001EN / 2016-11-11
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
info@metrohm.com
www.metrohm.com
pH Meter/Conductometer
912 Conductometer | 913 pH Meter |
914 pH/Conductometer
Manual
8.912.8001EN / 2016-11-11
fpe
Technische Dokumentation
Metrohm AG
CH-9100 Herisau
techdoc@metrohm.com
This documentation is protected by copyright. All rights reserved.
This documentation has been prepared with great care. However, errors
can never be entirely ruled out. Please send comments regarding possible
errors to the address above.
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Table of contents
Table of contents
1 Introduction
1
1.1
Instrument description ......................................................... 1
1.1.1
Instrument and sales versions .................................................. 2
1.1.2
Power supply ........................................................................... 2
1.1.3
Interfaces ................................................................................ 3
1.1.4
Sensors .................................................................................... 3
1.2
Intended use ......................................................................... 3
1.3
About the documentation ................................................... 3
1.3.1
Symbols and conventions ........................................................ 3
1.4
Safety instructions ................................................................ 4
1.4.1
General notes on safety ........................................................... 4
1.4.2
Electrical safety ........................................................................ 5
1.4.3
Flammable solvents and chemicals ........................................... 5
1.4.4
Recycling and disposal ............................................................. 6
2 Overview of the instrument
7
2.1
Instrument connectors ......................................................... 8
2.1.1
912 Conductometer ................................................................ 8
2.1.2
913 pH Meter .......................................................................... 8
2.1.3
914 pH/Conductometer IS ....................................................... 9
2.1.4
914 pH/Conductometer ........................................................... 9
2.2
Application environment ................................................... 10
2.2.1
Laboratory use ....................................................................... 10
2.2.2
Mobile application ................................................................. 11
3 Installation
12
3.1
Unpacking and inspecting the instrument ....................... 12
3.1.1
Packaging .............................................................................. 12
3.1.2
Checks .................................................................................. 12
3.1.3
Application area .................................................................... 12
3.2
Power supply ...................................................................... 12
3.2.1
Charging the accumulator ..................................................... 13
3.2.2
Operation with power supply unit ......................................... 14
3.2.3
Operation via USB connector (PC) .......................................... 15
3.3
Connecting sensors ............................................................ 15
3.4
Connecting a printer .......................................................... 16
3.5
Initial configuration ............................................................ 17
3.5.1
Setting the Language ............................................................. 17
3.5.2
Setting the date and time ...................................................... 18
pH Meter/Conductometer
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Table of contents
4 Operation
20
4.1
Switching the instrument on and off ............................... 20
4.2
Displays ............................................................................... 20
4.3
Status displays .................................................................... 23
4.3.1
Accumulator status ................................................................ 23
4.3.2
User rights ............................................................................. 23
4.3.3
Sensor quality for pH electrodes ............................................ 24
4.4
Control keys ........................................................................ 24
4.5
Basic operation ................................................................... 25
4.5.1
Main dialog with two measuring channels ............................. 25
4.5.2
Main dialog with one measuring channel ............................... 26
4.5.3
Operation in the main dialog ................................................. 27
4.5.4
Menu dialog .......................................................................... 28
4.5.5
Editing dialog ........................................................................ 29
4.5.6
Selection dialog ..................................................................... 31
4.5.7
Changing the user ................................................................. 32
4.6
Menu structures .................................................................. 33
4.6.1
912 Conductometer .............................................................. 34
4.6.2
913 pH Meter ........................................................................ 35
4.6.3
914 pH/Conductometer IS ..................................................... 36
4.6.4
914 pH/Conductometer ......................................................... 37
4.7
Menu dialogs ...................................................................... 38
4.7.1
Parameters pH/U/T and Parameters pH/U/T IS ........................ 38
4.7.2
Parameters Κ/TDS/Sal/ρ/T ...................................................... 39
4.7.3
Measured values .................................................................... 40
4.7.4
Sensors .................................................................................. 42
4.7.5
Report ................................................................................... 47
4.7.6
Configuration ........................................................................ 48
4.7.7
User ...................................................................................... 49
4.8
pH measurement ................................................................ 50
4.8.1
pH electrode calibration ......................................................... 50
4.8.2
Measurement ........................................................................ 52
4.9
Conductivity measurement ................................................ 53
4.9.1
Determination of the cell constant (calibration) ...................... 53
4.9.2
Measurement ........................................................................ 54
4.10 Issuing reports/measured values ....................................... 56
4.10.1 Printing out ........................................................................... 56
4.10.2 PC/LIMS and CSV data transfer .............................................. 56
5 Operation and maintenance
59
5.1
General notes ...................................................................... 59
5.1.1
Care ...................................................................................... 59
5.1.2
Maintenance by Metrohm Service .......................................... 59
5.1.3
Sensor care ............................................................................ 59
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Table of contents
5.2
Quality management and qualification with Metrohm . . 60
6 Troubleshooting
6.1
61
General ................................................................................ 61
6.2
Problems ............................................................................. 62
6.2.1
Troubleshooting .................................................................... 62
6.3
Restarting/resetting the instrument ................................. 64
6.3.1
Instrument reset .................................................................... 64
6.3.2
Resetting the instrument to factory settings ........................... 64
6.4
Messages ............................................................................. 65
7 Appendix
66
7.1
Saved buffer series ............................................................. 66
7.1.1
Metrohm ............................................................................... 67
7.1.2
NIST (according to DIN standard 19266, 2000) ...................... 68
7.1.3
DIN (according to DIN standard 19267, 2012) ....................... 69
7.1.4
Fisher .................................................................................... 70
7.1.5
Mettler Toledo ....................................................................... 71
7.1.6
Merck CertiPUR 20 / Titrisol ................................................... 72
7.1.7
Merck CertiPUR 25 ................................................................ 73
7.1.8
Beckmann ............................................................................. 74
7.1.9
Radiometer Analytical ............................................................ 75
7.1.10 Baker ..................................................................................... 76
7.1.11 Hamilton DURACAL ............................................................... 77
7.1.12 Fluka ..................................................................................... 78
8 Technical specifications
pH Meter/Conductometer
79
8.1
Measuring inputs ................................................................ 79
8.2
Measured value memory ................................................... 80
8.3
TFT display .......................................................................... 80
8.4
Interfaces ............................................................................. 80
8.5
Power supply ...................................................................... 80
8.6
Charging time ..................................................................... 81
8.7
Runtime with accumulator ................................................ 81
8.8
Housing specification ......................................................... 82
8.9
Safety specification ............................................................ 82
8.10
Electromagnetic compatibility (EMC) ................................ 82
8.11
Ambient temperature ......................................................... 83
8.12
Reference conditions .......................................................... 83
8.13
Dimensions/material ........................................................... 83
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Table of contents
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9 Accessories
84
Glossary
85
Index
86
pH Meter/Conductometer
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Table of figures
Table of figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
pH Meter/Conductometer
pH Meter/Conductometer - front ...................................................... 7
912 Conductometer - connectors ...................................................... 8
913 pH Meter - connectors ............................................................... 8
914 pH/Conductometer (digital) - connectors .................................... 9
914 pH/Conductometer (analog) - connectors ................................... 9
pH Meter/Conductometer in a laboratory setup ............................... 10
pH Meter/Conductometer for mobile application ............................. 11
USB Y cable ..................................................................................... 17
View - main dialog .......................................................................... 21
View - menu dialog ......................................................................... 21
View - editing dialog ....................................................................... 22
View - selection dialog .................................................................... 22
Operation - main dialog, two-channel ............................................. 26
Operation - main dialog, one-channel ............................................. 27
Operation - menu dialog ................................................................. 29
Operation - editing dialog ............................................................... 30
Operation - selection dialog ............................................................. 31
Example of a message ..................................................................... 65
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1 Introduction
1 Introduction
This manual gives you a comprehensive overview of the installation, functioning and operation of pH Meter/Conductometer.
NOTE
You can request application descriptions in the form of
Application Notes and Application Bulletins from your
Metrohm representative or download them from
http://www.metrohm.com.
1.1
Instrument description
pH Meter/Conductometers are designed for use both outdoors and
indoors as well as for stationary use in the laboratory.
The instruments come in four basic versions, which differ in their design
with regard to different measuring channels and respective functions.
912 Conductometer
With a measuring channel for measuring conductivity, TDS and salinity.
913 pH Meter
With an analog and a digital measuring channel each for measuring pH,
potential and temperature.
914 pH/Conductometer IS
With a digital measuring channel for measuring pH, potential and temperature and a measuring channel for measuring conductivity, TDS, salinity
and temperature.
914 pH/Conductometer
With an analog measuring channel for measuring pH, potential and temperature and a measuring channel for measuring conductivity, TDS, salinity and temperature.
The pH/Conductometers are equipped with a permanently installed accumulator for mobile use.
For stationary use in the laboratory, the instrument can be connected to
the power supply with a dedicated power supply unit.
pH Meter/Conductometer
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1.1 Instrument description
1.1.1
Instrument and sales versions
pH Meter/Conductometers are available in the following versions:
Table 1
Instrument versions
2.912.0010
912 Conductometer
Instrument with standard
accessories
2.912.0110
912 Conductometer
Mobile version with accessories case
2.912.0210
912 Conductometer
Laboratory version with
stand plate
2.913.0010
913 pH Meter (digital/analog)
Instrument with standard
accessories
2.913.0110
913 pH Meter (digital/analog)
Mobile version with accessories case
2.913.0210
913 pH Meter (digital/analog)
Laboratory version with
stand plate
2.914.0010
914 pH/Conductometer (pH digital)
Instrument with standard
accessories
2.914.0020
914 pH/Conductometer (pH analog)
Instrument with standard
accessories
2.914.0110
914 pH/Conductometer (pH digital)
Mobile version with accessories case
2.914.0120
914 pH/Conductometer (pH analog)
Mobile version with accessories case
2.914.0210
914 pH/Conductometer (pH digital)
Laboratory version with
stand plate
2.914.0220
914 pH/Conductometer (pH analog)
Laboratory version with
stand plate
NOTE
The accessories for a given instrument version can be viewed as a PDF
list on the Internet at http://partslists.metrohm.com.
1.1.2
Power supply
The instrument is powered either by a built-in accumulator or, for stationary use, by a power supply unit.
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pH Meter/Conductometer
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1.1.3
1 Introduction
Interfaces
You can connect a printer or establish a connection with a PC for data
transfer (PC/LIMS report and CSV format) using the USB interface.
1.1.4
Sensors
Metrohm offers various sensors for specific measurements.
NOTE
For more information on the basic theoretical principles, please refer to
the Metrohm monograph Electrodes in Potentiometry.
1.2
Intended use
This instrument is suitable for making measurements in chemicals and
flammable samples. Therefore, using the pH Meter/Conductometer
requires the user to have basic knowledge and experience in handling
toxic and caustic substances. Knowledge of the application of the fire protection measures prescribed for laboratories is also mandatory.
1.3
About the documentation
CAUTION
Please read through this documentation carefully before putting the
instrument into operation. The documentation contains information
and warnings which the user must follow in order to ensure safe operation of the instrument.
1.3.1
Symbols and conventions
The following symbols and formatting may appear in this documentation:
Cross-reference to figure legend
The first number refers to the figure number, the second to the instrument part in the figure.
Instruction step
Carry out these steps in the sequence shown.
Method
pH Meter/Conductometer
Dialog text, parameter in the software
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1.4 Safety instructions
File ▶ New
Menu or menu item
[Next]
Button or key
WARNING
This symbol draws attention to a possible life-threatening hazard or risk of injury.
WARNING
This symbol draws attention to a possible hazard due
to electrical current.
WARNING
This symbol draws attention to a possible hazard due
to heat or hot instrument parts.
WARNING
This symbol draws attention to a possible biological
hazard.
CAUTION
This symbol draws attention to possible damage to
instruments or instrument parts.
NOTE
This symbol highlights additional information and
tips.
1.4
Safety instructions
1.4.1
General notes on safety
WARNING
This instrument may only be operated in accordance with the specifications in this documentation.
This instrument has left the factory in a flawless state in terms of technical
safety. To maintain this state and ensure non-hazardous operation of the
instrument, the following instructions must be observed carefully.
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pH Meter/Conductometer
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1.4.2
1 Introduction
Electrical safety
Electrical safety when working with the instrument is ensured in compliance with international standard IEC 61010.
WARNING
Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.
WARNING
Never open the housing of the instrument. The instrument could be
damaged.
There are no parts inside the housing which can be serviced or replaced
by the user.
Accumulator / power supply unit
WARNING
Only use the power supply unit for its intended purpose. Inappropriate
use or use of non-approved or incompatible power supply units may
cause fires and result in the revocation of the guarantee or warranty.
If you think that the accumulator or the power supply unit has been
damaged, have it checked by a service center. Do not use damaged
accumulators or power supply units.
Do not use the power supply unit outdoors.
1.4.3
Flammable solvents and chemicals
WARNING
All relevant safety measures are to be observed when working with
flammable solvents and chemicals.
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pH Meter/Conductometer
Set up the instrument in a well-ventilated location (e.g. fume cupboard).
Keep all sources of flame far from the workplace.
Clean up spilled liquids and solids immediately.
Follow the safety instructions of the chemical manufacturer.
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1.4 Safety instructions
1.4.4
Recycling and disposal
This product is covered by European Directive 2002/96/EC, WEEE – Waste
from Electrical and Electronic Equipment.
The correct disposal of your old equipment will help to prevent negative
effects on the environment and public health.
More details about the disposal of your old equipment can be obtained
from your local authorities, from waste disposal companies or from your
local dealer.
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pH Meter/Conductometer
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2 Overview of the instrument
2 Overview of the instrument
Figure 1
pH Meter/Conductometer - front
1
Connectors / interfaces
With a cover cap for the USB interface and
the digital interface.
2
Sensor holder slot
For mobile applications, a sensor holder may
be inserted here.
3
Display
For measured values and menus (see Chapter 4.2, page 20).
4
Keypad
With a total of eight keys to operate the
instrument (see Chapter 4.4, page 24).
5
Eyelet for carrying strap
As accessory for mobile applications.
pH Meter/Conductometer
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2.1 Instrument connectors
2.1
Instrument connectors
2.1.1
912 Conductometer
Figure 2
1
912 Conductometer - connectors
Conductivity measuring cell
Connection socket for conductivity measuring cells.
2.1.2
2
Type B mini USB connector
Connection socket for power supply, data
transmission and printing.
913 pH Meter
Figure 3
913 pH Meter - connectors
1
pH/mV electrode
Connection socket for analog pH/mV electrodes.
2
Temperature sensor / reference
3
pH/mV electrode
Connection socket for 854 iConnect for
connecting iTrodes.
4
Type B mini USB connector
Connection socket for power supply, data
transmission and printing.
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pH Meter/Conductometer
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2.1.3
2 Overview of the instrument
914 pH/Conductometer IS
Figure 4
914 pH/Conductometer (digital) - connectors
1
Conductivity measuring cell
Connection socket for conductivity measuring cells.
3
Type B mini USB connector
Connection socket for power supply, data
transmission and printing.
2.1.4
2
pH/mV electrode
Connection socket for 854 iConnect for
connecting iTrodes.
914 pH/Conductometer
Figure 5
914 pH/Conductometer (analog) - connectors
1
pH/mV electrode
Connection socket for analog pH/mV electrodes.
2
Temperature sensor / reference
3
Conductivity measuring cell
Connection socket for conductivity measuring cells.
4
Type B mini USB connector
Connection socket for power supply, data
transmission and printing.
pH Meter/Conductometer
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2.2 Application environment
2.2
Application environment
pH Meter/Conductometer instruments have been designed for use in
laboratories and for mobile use indoors or outdoors.
The sturdy design meets the requirements in accordance with IP 67 protection marking. The instruments are therefore protected against shorttime immersion in water, provided that the respective plugs are plugged in
at the sensor connectors.
2.2.1
Laboratory use
In the laboratory, pH Meter/Conductometer instruments can be placed
in an instrument base console.
Figure 6
pH Meter/Conductometer in a laboratory setup
1
Electrode holder
3
Instrument base console
Consisting of receptacle base and support
rod.
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2
Clamping ring
pH Meter/Conductometer
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2.2.2
2 Overview of the instrument
Mobile application
For mobile application, pH Meter/Conductometer instruments can be
equipped with a carrying strap and one or two slide-in holders for electrodes.
Figure 7
1
pH Meter/Conductometer for mobile application
Electrode holder
The holders can be inserted from both sides
(left/right) of the instrument.
pH Meter/Conductometer
2
Eyelet for carrying strap
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3.1 Unpacking and inspecting the instrument
3 Installation
3.1
Unpacking and inspecting the instrument
3.1.1
Packaging
The instrument is supplied in protective packaging together with the separately packed accessories. Keep this packaging, as only this ensures safe
transportation of the instrument.
3.1.2
Checks
Immediately after receipt, check whether the shipment has arrived complete and without damage by comparing it with the delivery note.
3.1.3
Application area
pH Meter/Conductometers have been designed for mobile application
outdoors and/or in the laboratory.
CAUTION
Influence of weather conditions
Damage to instruments as a result of direct sunlight or temperatures
below the freezing point.
When you are not using the instrument, do not expose it to direct sunlight or to temperatures below 0°C.
3.2
Power supply
The pH Meter/Conductometer is equipped with a built-in accumulator
which means it can be used for mobile applications. For stationary use in
the laboratory, the instrument can be operated with a power supply unit.
NOTE
Accumulator state of charge
You receive the accumulator in a partially charged state. However, you
may have to charge it again before you can use the instrument for the
first time.
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3 Installation
CAUTION
Unauthorized manipulations
The instrument may be damaged as a result of unauthorized manipulations.
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■
For charging, only use the supplied power supply unit (6.2166.100)
or the optional car charger adapter (6.2166.500), which have been
approved as accessories for use with this instrument.
Your instrument's accumulator cannot be removed.
Do not attempt to remove the accumulator from the instrument. To
replace the accumulator, take the instrument to your nearest authorized Metrohm Service.
Unauthorized replacement of the accumulator may result in a loss of
the warranty.
NOTE
Function of the control keys
For the installation steps below you need to use the control keys.
These are described in the following Operation chapter (see Chapter
4.4, page 24).
3.2.1
Charging the accumulator
NOTE
Charge accumulator
The accumulator is charged only when the instrument is switched on.
Please observe the following procedure:
1.
First, connect the USB cable to the supplied power supply unit, then
the power supply unit to the socket, and then finally the mini USB
connector of the cable to your instrument.
2.
3.
Switch on the instrument with the
.
When the accumulator is fully charged, disconnect the power supply
unit first from the instrument and then from the socket.
or
pH Meter/Conductometer
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3.2 Power supply
If no power socket is available, you can also charge your instrument via
the USB interface of a computer (PC) or a car charger adapter.
NOTE
Charging capacity
The charging process requires a minimum capacity of 500 mAh.
■
■
1.
2.
3.
Use a USB hub with external power supply or a suitable USB connector on the computer (PC).
For mobile charging of the accumulator, use a car charger adapter
from the Metrohm accessories (6.2166.500).
Connect the USB cable first to the computer and then to your instrument.
Then switch on the instrument.
As soon as the accumulator is fully charged, disconnect the USB cable
first from the instrument and then from the computer.
NOTE
Accumulator condition
The accumulator performance may deteriorate over time. If the operating times are much shorter than usual, take the instrument to the closest Metrohm Service to have the accumulator replaced.
3.2.2
Operation with power supply unit
You can operate the pH Meter/Conductometer with the supplied
power supply unit without restrictions.
CAUTION
Measuring with power supply unit connected
Inappropriate power supply units interfere with the measuring signal.
Use only the supplied power supply unit (6.2166.100) for measuring.
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pH Meter/Conductometer
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3 Installation
NOTE
Charging the accumulator with a power supply
The accumulator will not be overcharged if the instrument is used for
extended periods with the power supply unit connected. The instrument is equipped with a charging controller to protect the accumulator.
3.2.3
Operation via USB connector (PC)
NOTE
Measuring signal interference
Inappropriate power supply units of a PC interfere with the measuring
signal.
■
■
Use PCs or laptops with a grounded power supply unit.
When using an ungrounded PC power supply unit, cut the USB connection between pH Meter/Conductometer and PC before the measurement.
Operating the instrument with power supplied via a USB connector
requires a minimum capacity of 500 mAh (see Chapter 3.2.1, page 13).
3.3
Connecting sensors
Sensors can be connected while the instrument is running.
NOTE
Parameter setting
Please note that if you change the sensor, the sensor either has to be
selected in the menu dialog Menu ▶ Parameters X ▶ Measuring
parameters ▶ Sensor name, or a new sensor has to be entered in
the sensor list.
pH Meter/Conductometer
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3.4 Connecting a printer
NOTE
iConnect for iTrodes
Sensors from the iTrodes line are only supported by the 854 iConnect series 07 or higher.
The series is indicated by the number 17 in the following serial number
example:
1854001017216
3.4
Connecting a printer
Printers for report output are connected with the USB Y cable
(6.2151.140).
NOTE
Printer function
The connected printer will only work if the
pH Meter/Conductometer is connected to the power supply unit.
NOTE
Measuring signal interference
Inappropriate power supply units of a printer interfere with the measuring signal.
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■
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With the Metrohm USB printer "Neos" (2.141.0100) there is no
interference.
Only use printers with a grounded power supply unit.
pH Meter/Conductometer
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3 Installation
Figure 8
USB Y cable
1
USB type A
Power supply unit connector for power supply.
3
USB type B
Printer connector.
3.5
Initial configuration
3.5.1
Setting the Language
2
USB type B mini
Instrument connector pH Meter/
Conductometer.
NOTE
"Language" factory setting
English is set in the language settings on instruments delivered ex
works.
The following languages are available on the instrument:
German
English
Spanish
French
Portuguese
Chinese
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■
Setting the Language
You can access the menu structures via the Menu item (see Figure 13,
page 26) on the main screen.
1
pH Meter/Conductometer
Use the
or
arrow key to select the entry point.
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3.5 Initial configuration
2
3
Use the
button to change to the menu structures.
arrow key to select the Configuration menu struc-
Use the
ture and use the
4
5
arrow key to select the Language menu dialog and
Use the
use the
key to change to the menu structure.
key to change to the selection dialog.
Use the
or
arrow key to select the required lan-
guage and confirm with the
3.5.2
key.
Setting the date and time
NOTE
"Date and time" factory setting
The date and time values of the manufacturer are set on the instruments ex works.
If the accumulator is deeply discharged, the system time will be reset to
the default value.
Setting the date and time
You can access the menu structures via the Menu item (see Figure 13,
page 26) on the main screen.
1
2
3
Use the
Use the
or
button to change to the menu structures.
Use the
ture and use the
18 ■■■■■■■■
arrow key to select the entry point.
arrow key to select the Configuration menu struckey to change to the menu structure.
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
3 Installation
4
Use the
arrow key to select the Date or Time menu dialog
and use the
key to change to the editing dialog.
■
■
Date format: YYYY-MM-DD
Time format: hh:mm:ss
5
Use the
,
,
and
arrow keys to select the
required characters and confirm with the
key in each case.
6
Confirm the final value with the
key.
pH Meter/Conductometer
editing element and the
■■■■■■■■ 19
■■■■■■■■■■■■■■■■■■■■■■
4.1 Switching the instrument on and off
4 Operation
4.1
Switching the instrument on and off
Switching on the instrument
Please proceed as follows:
1
Press the
key.
The instrument is initialized and a system test is performed. This process takes some time.
A starting image is displayed during start-up.
Then the main dialog is displayed. Now the instrument is ready.
Switching off the instrument
1
Press the
key.
The 912-129 Shut down message appears, the instrument saves
the data and switches off.
4.2
Displays
The pH Meter/Conductometer has a total of four display types containing specific displays and/or operating functions.
■
■
■
■
Main dialog
Menu dialog
Editing dialog
Selection dialog
NOTE
Active dialog field
The actively selected dialog field is always displayed with the Metrohm
green contrast color.
In this case, the entry point for the Menu menu structures is selected.
20 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
Main dialog
The main dialog (example: both measuring channels displayed) is the normal status after the instrument has been switched on.
Figure 9
Menu dialog
4 Operation
View - main dialog
The menu dialog is used for navigating through the functional structures.
Menu lines with an arrow contain another, deeper structure with further
dialogs.
Figure 10
Editing dialog
View - menu dialog
Editing dialogs are used in general for data entry and editing.
Depending on the data type, a different set of possible characters is available.
pH Meter/Conductometer
■■■■■■■■ 21
■■■■■■■■■■■■■■■■■■■■■■
4.2 Displays
NOTE
Capital letters and special characters
You can insert capital letters and special characters by holding the
key pressed down.
Figure 11
Selection dialog
Selection dialogs offer default values for selection in corresponding data
fields.
Figure 12
22 ■■■■■■■■
View - editing dialog
View - selection dialog
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4.3
4 Operation
Status displays
The main dialog displays contain corresponding graphical elements to
show instrument and sensor statuses.
4.3.1
Accumulator status
The accumulator status is displayed in five stages with colored graphical
elements.
The accumulator is fully charged and charging is complete.
The accumulator is nearly fully charged but still charging.
The accumulator is 75% charged.
The accumulator is 50% charged.
The accumulator is 25% charged.
The accumulator is flat.
NOTE
Flash icon
The flash icon indicates that the instrument is connected to a power
source for charging.
4.3.2
User rights
The user rights can be set in the Menu menu under User as Dialog
type:
1.
2.
Expert
Use of the instrument is unrestricted. All functions are available.
Routine
The Configuration and Sensors menu structures are locked.
key icon (at the top in the main dialog) is displayed, then the
If the
user menu is limited to the functions for Routine users.
pH Meter/Conductometer
■■■■■■■■ 23
■■■■■■■■■■■■■■■■■■■■■■
4.4 Control keys
4.3.3
Sensor quality for pH electrodes
The sensor quality is indicated with three colored graphical elements.
The criteria for the display status are set in the calibration parameters (see
Chapter 4.7.4, page 42).
The electrode is in a good range with regard to the limit values set.
The electrode is close to the limit value range.
The limit value range is defined as follows.
■
■
Slope limit value with an approximation of 1% to the set limit value.
Limit value pH(0) with an approximation of 0.1 pH to the set limit
value.
The electrode is outside the limit values.
4.4
Control keys
Keypad
Switching the instrument on or off.
■
■
To switch on, briefly press the pushbutton. The instrument starts.
To switch off, briefly press the pushbutton. A message appears and
the instrument switches off.
The CAL key starts the procedure to calibrate a sensor.
24 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
NOTE
Calibration
A sensor can be calibrated only in the corresponding one-channel main
dialog.
The BACK key causes the entry to be accepted and/or exits the dialog.
The OK key confirms a selection or starts a process.
The LEFT/RIGHT arrow keys are used for navigating in the text and
number editor for selecting characters, or for toggling between the measuring channel displays in the main dialog.
The UP/DOWN arrow keys are used for navigating the selection bar one
line up or down, or for selecting characters in the text editor.
4.5
Basic operation
The following chapters describe the various displays and how to operate
them.
4.5.1
Main dialog with two measuring channels
The view with two measuring channels is displayed after the instrument
start-up.
NOTE
This does not apply for the 912 Conductometer, as this instrument
has only one measuring channel.
NOTE
Temperature display
The temperature displays on the two measuring channels can only be
compared in the same medium.
As a result of temperature sensor and instrument tolerances, the displayed values might deviate from each other.
pH Meter/Conductometer
■■■■■■■■ 25
■■■■■■■■■■■■■■■■■■■■■■
4.5 Basic operation
Figure 13
Operation - main dialog, two-channel
1
Battery state of charge
(see Chapter 4.3.1, page 23).
2
Menu access
(see "Accessing the menu structures", page
27).
3
Sensor condition
(see Chapter 4.3.3, page 24).
4
Display measuring channel 1
5
Calibration interval display
Time in days until the next calibration is due.
6
Display measuring channel 2
7
Print/save measured value
Button for the functions print, save or
print+save.
8
Date/time display
Both measured values are printed and/or
saved.
NOTE
The procedure for functions of the main dialog with two measuring
channels is the same as for the main dialog with one measuring channel:
■
■
4.5.2
(see "Accessing the menu structures", page 27).
(see "Toggling from one-channel to two-channel view", page 28).
Main dialog with one measuring channel
The corresponding measuring channel is displayed according to the selection.
In addition, the display and input fields ID1, ID2 and User are displayed in
the main dialog with one measuring channel.
26 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
Figure 14
Operation - main dialog, one-channel
1
Battery state of charge
(see Chapter 4.3.1, page 23).
2
Menu access
(see "Accessing the menu structures", page
27).
3
Sensor condition
(see Chapter 4.3.3, page 24).
4
Measuring channel display
5
Calibration interval display
Time in days until the next calibration is due.
6
Print/save measured value
Button for the functions print, save or
print+save.
The measured value with the currently
selected measuring channel is printed and/or
saved.
7
ID1
Input option for sample designation/identification (e.g. name, number, etc.).
8
ID2
Input option for sample designation/identification (e.g. batch number, lot number, etc.).
9
User
Input option for the user name or display of
the preset value from the User menu dialog
(see Chapter 4.7.7, page 49).
10
Date/time display
4.5.3
Operation in the main dialog
Accessing the menu structures
You can access the menu structures via the Menu item (14-2) in the main
dialog.
1
pH Meter/Conductometer
Select the entry point with the
or
arrow keys.
■■■■■■■■ 27
■■■■■■■■■■■■■■■■■■■■■■
4.5 Basic operation
2
Use the
key to change to the menu structures.
Toggling from one-channel to two-channel view
The view can be changed in instruments with two measuring channels.
Three views can be displayed as follows:
Display with both measuring channels.
Display with measuring channel 1 and the data ID1, ID2 and User.
Display with measuring channel 2 and the data ID1, ID2 and User.
■
■
■
1
You can toggle between the views as needed with the
arrow keys.
or
Printing and/or saving measured values
Measured value recording is started with the Print/save measured
value button.
■
- Printing the measured values.
■
- Printing and saving the measured values.
■
- Saving the measured values.
The respective triggering is determined by the settings in the menu:
■
■
4.5.4
Menu ▶ Measured values ▶ Values
and
Menu ▶ Measured values ▶ Data
(see Chapter 4.7.3, page 40).
Menu dialog
The further menu structures, editing dialogs and selection dialogs can be
selected in the menu dialog.
28 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
Figure 15
Operation - menu dialog
1
Menu title
The menu title indicates which menu structure is currently open.
3
Arrow icon
The arrow icon indicates that there are further substructures.
2
Menu line selected
The selected menu line is always displayed in
the color Metrohm green and in inversed
text.
Navigation in the menu structures
You can access the menu structures via the Menu item (14-2) in the main
dialog.
1
2
3
4.5.5
Select the desired menu line with the
keys.
Change into the next substructure with the
Change back to the higher structure with the
or
arrow
key.
key.
Editing dialog
The entries can be created and edited again in the editing dialog.
pH Meter/Conductometer
■■■■■■■■ 29
■■■■■■■■■■■■■■■■■■■■■■
4.5 Basic operation
Figure 16
Operation - editing dialog
1
Menu title
2
Menu line
3
Data field
4
Selectable characters
5
Function elements
The data entry is accepted with the Entry editing element.
The editing dialog is closed without changing the existing data value with
the Cancel editing element.
The entire contents of the data field are deleted and a new data value can
be entered with the Delete all editing element.
The character to the left of the cursor is deleted in the data field with the
Backspace editing element.
The cursor moves one space to the left in the data field with the One
space to the left editing element.
The cursor moves one space to the right in the data field with the One
space to the right editing element.
NOTE
Capital letters / special characters
Capital letters and special characters can be entered by holding the
key on the respective standard character.
30 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4.5.6
4 Operation
Selection dialog
In selection dialogs, you can select and apply fixed data values.
Figure 17
1
Menu title
3
Selectable data values
Operation - selection dialog
2
Menu line
Changing data values
The data values of the corresponding menu function can be selected, if
required.
1 On the corresponding menu function, open the selection window
with the
2
3
pH Meter/Conductometer
key.
Select the required data value with the
keys.
or
arrow
Apply the data value and exit the selection window with the
key.
■■■■■■■■ 31
■■■■■■■■■■■■■■■■■■■■■■
4.5 Basic operation
4.5.7
Changing the user
The user can be set to two different dialog types in the instrument (see
Chapter 4.7.7, page 49).
Routine
Changing the instrument to the User Routine:
1 Switch to the selection dialog Menu ▶ User ▶ Dialog type
2 Select the Dialog type Routine.
The instrument's functions are limited for the user and the key icon
is displayed in the main menu.
Expert
Changing the instrument to the User Expert:
1 Switch to the selection dialog Menu ▶ User ▶ Dialog type
2 Select the Dialog type Expert.
3 Switch to the selection dialog Menu ▶ User ▶ Password
4 Enter the Password set on the instrument and confirm with the
icon.
The instrument's functions are fully accessible and the key icon
is no longer displayed in the main menu.
32 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4.6
4 Operation
Menu structures
pH Meter/Conductometer instruments contain different menu structures depending on the instrument version. These structures are represented in an overview in the following tables:
■
■
■
■
912 Conductometer
(see Chapter 4.6.1, page 34)
913 pH Meter
(see Chapter 4.6.2, page 35)
914 pH/Conductometer IS
(see Chapter 4.6.3, page 36)
914 pH/Conductometer
(see Chapter 4.6.4, page 37)
NOTE
Menu dialogs
The menu dialogs and the corresponding menu lines are described in
more detail in the next chapter (see Chapter 4.7, page 38).
pH Meter/Conductometer
■■■■■■■■ 33
■■■■■■■■■■■■■■■■■■■■■■
4.6 Menu structures
4.6.1
912 Conductometer
Table 2
Menu
912 Conductometer – menu structures
Parameters Κ/TDS/Sal/ρ/T
(see Chapter 4.7.2, page 39)
Measured values
(see Chapter 4.7.3, page 40)
■
■
■
■
■
■
■
■
Sensors
(see Chapter 4.7.4, page 42)
Report
(see Chapter 4.7.5, page 47)
Configuration
(see Chapter 4.7.6, page 48)
■
■
■
■
■
■
■
■
■
■
■
■
■
Measuring parameters
Calibration param.
Values
Data
Criterion
Output date/time
Output headers
Calibration data
Sensor list
New sensor
Delete sensor
Report
Line feed
Printer
Date
Time
Power off after
Turn off LCD after
Brightness
Program version
Language
Service/Diagnosis
User
(see Chapter 4.7.7, page 49)
34 ■■■■■■■■
■
■
User
Dialog type
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4.6.2
4 Operation
913 pH Meter
Table 3
Menu
913 pH Meter – menu structures
Parameters pH/U/T
Parameters pH/U/T IS
■
■
Measuring parameters
Calibration param.
(see Chapter 4.7.1, page 38)
Measured values
(see Chapter 4.7.3, page 40)
■
■
■
■
■
■
Sensors
(see Chapter 4.7.4, page 42)
Report
(see Chapter 4.7.5, page 47)
Configuration
(see Chapter 4.7.6, page 48)
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Values
Data
Criterion
Output date/time
Output headers
Calibration data
Sensor list
New sensor
Delete sensor
Report
Line feed
Printer
Last decimal place
Date
Time
Power off after
Turn off LCD after
Brightness
Program version
Language
Service/Diagnosis
User
(see Chapter 4.7.7, page 49)
pH Meter/Conductometer
■
■
User
Dialog type
■■■■■■■■ 35
■■■■■■■■■■■■■■■■■■■■■■
4.6 Menu structures
4.6.3
914 pH/Conductometer IS
Table 4
Menu
914 pH/Conductometer IS – menu structures
Parameters pH/U/T IS
(see Chapter 4.7.1, page 38)
Parameters Κ/TDS/Sal/ρ/T
(see Chapter 4.7.2, page 39)
Measured values
(see Chapter 4.7.3, page 40)
■
■
■
■
■
■
■
■
■
■
Sensors
(see Chapter 4.7.4, page 42)
Report
(see Chapter 4.7.5, page 47)
Configuration
(see Chapter 4.7.6, page 48)
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Measuring parameters
Calibration param.
Measuring parameters
Calibration param.
Values
Data
Criterion
Output date/time
Output headers
Calibration data
Sensor list
New sensor
Delete sensor
Report
Line feed
Printer
Last decimal place
Date
Time
Power off after
Turn off LCD after
Brightness
Program version
Language
Service/Diagnosis
User
(see Chapter 4.7.7, page 49)
36 ■■■■■■■■
■
■
User
Dialog type
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4.6.4
4 Operation
914 pH/Conductometer
Table 5
Menu
914 pH/Conductometer – menu structures
Parameters pH/U/T
(see Chapter 4.7.1, page 38)
Parameters Κ/TDS/Sal/ρ/T
(see Chapter 4.7.2, page 39)
Measured values
(see Chapter 4.7.3, page 40)
■
■
■
■
■
■
■
■
■
■
Sensors
(see Chapter 4.7.4, page 42)
Report
(see Chapter 4.7.5, page 47)
Configuration
(see Chapter 4.7.6, page 48)
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Measuring parameters
Calibration param.
Measuring parameters
Calibration param.
Values
Data
Criterion
Output date/time
Output headers
Calibration data
Sensor list
New sensor
Delete sensor
Report
Line feed
Printer
Last decimal place
Date
Time
Power off after
Turn off LCD after
Brightness
Program version
Language
Service/Diagnosis
User
(see Chapter 4.7.7, page 49)
pH Meter/Conductometer
■
■
User
Dialog type
■■■■■■■■ 37
■■■■■■■■■■■■■■■■■■■■■■
4.7 Menu dialogs
4.7
Menu dialogs
4.7.1
Parameters pH/U/T and Parameters pH/U/T IS
The Parameters pH/U/T menu dialog for the parameters Measurement
and Calibration is shown below with the structure and the description.
Measuring parameters ▶
Measuring mode
Menu dialog for the Measuring parameters.
Selection dialog for selecting the measuring mode.
■
■
■
Sensor name
pH
The pH value is output.
U
The potential value is output in mV.
T
The temperature is output in °C.
Selection dialog for selecting a sensor from the sensor list.
In instruments with iTrodes, this is only a display field.
Order number
Display field with the sensor's Order number.
Serial number
Display field with the sensor's Serial number.
Temperature
Editing dialog for the manual entry of the measuring temperature.
■
Default value: 25.0 °C / input range: –999.9 - +999.9 °C
Does not apply for instruments with iTrodes.
Delta measurement mV
Selection dialog
■
■
Calibration param. ▶
Temperature
Menu dialog for the Calibration param..
Editing dialog for the manual entry of the calibration temperature.
■
Report
■
38 ■■■■■■■■
Default value: 25.0 °C / input range: 0.0 - 99.9 °C
Selection dialog
■
Number of buffers
on: with the input field for the Reference
with default value: 0.0 mV / input range: –1,500.0 - +1,500.0 mV
off: is the default setting
on
off: is the default setting
Selection dialog for the Number of buffers that are used for calibration.
■
Default value: 2 / input range: 1 - 5
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
Buffer type
4 Operation
Selection dialog for selecting the buffer type.
■
■
4.7.2
Available buffers and their values (see Chapter 7.1, page 66)
If required, the preset values may be adjusted for the Special buffer type.
Default value: 7 / input range: –19.999 - +19.999
Parameters Κ/TDS/Sal/ρ/T
The Parameters Κ/TDS/Sal/ρ/T menu dialog for the parameters Measurement and Calibration is shown below with the structure and the
description.
Measuring parameters ▶
Measuring mode
Menu dialog for the Measuring parameters.
Selection dialog for selecting the Measuring mode.
■
■
■
■
■
Cond. K
The conductivity of the sample is output.
TDS
(Total Dissolved Solids)
Salinity
The salinity is output.
ρ
The resistance value is output.
T
The temperature is output.
Sensor name
Selection dialog for a sensor from the sensor list.
Order number
Display field for the Order number of the selected sensor.
Serial number
Display field for the Serial number of the selected sensor.
Temperature
Editing dialog for entering the measuring temperature.
■
Reference temp.
Editing dialog for entering the reference temperature of the calibration standard.
■
Temp. compens.
■
■
pH Meter/Conductometer
Default value: 25.0°C / input range: 0 - 99.9°C
Editing dialog for entering the temperature compensation value.
■
TDS factor
Default value: 25.0°C / input range: –999.9 - +999.9°C
Default value: 2.00%/°C / input range: 0.00 - 9.99%/°C
If no temperature compensation is to be applied, enter 0.0%/°C.
DIN
Permanently saved function for temperature compensation for natural
groundwater, well water or surface water in accordance with DIN 38404-C8.
Editing dialog for entering the factor value for the TDS calculation.
■■■■■■■■ 39
■■■■■■■■■■■■■■■■■■■■■■
4.7 Menu dialogs
■
Calibration param. ▶
Temperature
Menu dialog for the Calibration param..
Editing dialog for manually entering the calibration temperature.
■
Reference temp.
■
Default value: 1.90%/°C / input range: 0.00 - 9.99%/°C
If no temperature compensation is to be applied, enter 0.0%/°C.
Selection dialog
■
■
4.7.3
Default value: 12.870 mS/cm / input range: 0.0000 - 2,000.0 mS/cm
Editing dialog for entering the temperature compensation.
■
Report
Default value: 25.0°C / input range: 0 - 99.9°C
Editing dialog for entering the calibration standard value.
■
Temp. compens.
Default value: 25.0°C / input range: 0 - 99.9°C
Editing dialog for entering the reference temperature of the calibration standard.
■
Stand. conduct.
Default value: 0.40 / input range: 0.40 - 1.00°C
on
off: is the default value
Measured values
The Measured values menu dialog is shown below with the structure
and the description.
Values
1.
2.
■
■
■
■
40 ■■■■■■■■
Selection dialog for viewing and deleting the Values on the instrument.
Selection dialog to indicate how the Values are to be saved on the instrument for output.
view
The measured values are shown individually on the display and can be toggled individually with the arrow keys.
In addition, you can navigate in the measured value list as follows using the
key:
– If you push the key briefly, then the last measured value will be displayed.
– If you hold the key for longer, then the first measured value will be
displayed.
delete all
All measured values on the instrument will be irreversibly deleted.
delete last
The latest (newest) measured value will be irreversibly deleted.
save as CSV
The currently saved measured values will be saved on the instrument as a
CSV file (see "CSV file", page 57).
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
■
Data
Criterion
Selection dialog to indicate whether the Data are to be printed and/or saved.
■
print:
■
save:
■
print+save:
Selection dialog to indicate when the Measured values are applied during the
measurement.
■
■
■
pH Meter/Conductometer
save as PC/LIMS
The currently saved measured values will be saved on the instrument as PC/
LIMS file (see "PC/LIMS report", page 57).
immediately
The displayed measured value will be immediately applied.
time-dependent
The measured value will be applied during a Time interval that can be set.
For the PC/LIMS report, the individual measured values are grouped in a data
group.
The interval ends after the Stop time has been achieved.
The parameters are as follows:
– Time interval in seconds
Default value: 4 s / input range: 1 - 999,999 s
– Stop time in seconds
Default value: off / input range: 1 - 999,999 s
when changed
The subsequent measured value will only be applied automatically if the deviation from the previous measured value is greater than the value
delta pH/T/mV/Κ defined here.
– Delta pH
Default value: 0.50 pH / input range: 0.10 - 16.00 pH
– Delta T(pH)
Default value: 0.5 °C / input range: 0.1 - 100.0 °C
– Delta mV
Default value: 30.0 mV / input range: 0.1 - 999.9 mV
– Delta κ
Default value: 0.1 mS/cm / input range: 0.0001 - 10 mS/cm
– Delta T(κ)
Default value: 0.5 °C / input range: 0.1 - 100.0 °C
– Stop time
Default value: off / input range: 1 - 999,999 s
– Primary channel
Selection dialog for selecting the measuring channel that has to fulfill
the change criterion.
■■■■■■■■ 41
■■■■■■■■■■■■■■■■■■■■■■
4.7 Menu dialogs
■
drift-dependent
The measured value will be applied when the value is stable according to the
drift criterion.
The drift thresholds are preset and cannot be changed:
– pH measurement: 0.028 pH/min
– Potential measurement U/mV: 1.875 mV/min
– Temperature measurement T/°C: 0.974 °C/min
For the conductivity, various drift thresholds are stored (depending on the
measuring range):
– 0.005 mS/cm/min in the measuring range up to 16 µS/cm
– 0.5 mS/cm/min in the measuring range from 16 µS/cm to 1 mS/cm
– 10 mS/cm/min in the measuring range from 1 mS/cm
For instruments with two measuring channels, the primary measuring channel for the fulfillment of the drift criterion has to be selected.
– Primary channel
Selection dialog for selecting the measuring channel that has to fulfill
the drift criterion.
pH/mV or Cond.
Output date/time
Selection dialog for selecting whether a time stamp is to be assigned to a measured value.
■
■
Output headers
Selection dialog for selecting how the headers are output.
■
■
■
Calibration data
once
always: is the default setting
off
Selection dialog for selecting whether the main Calibration data is assigned for
the output of the measured values.
■
■
4.7.4
on: Measured values contain a time stamp on the report.
off: Measured values do not contain a time stamp on the report.
Default value: off
on
off: is the default setting
Sensors
The Sensors menu dialog is shown below with the structure and the
description.
42 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
NOTE
Extent of the menu dialog
Depending on the instrument version and the sensor type, not all or
only the specific menu lines are available in the instrument's menu dialog.
The overview below includes a description of all menu lines.
■
■
Menu lines that are available only for pH measurement are marked
with the [ icon.pH]
Menu lines that are available only for conductivity are marked with
the [ icon. K ]
NOTE
iTrodes
iTrodes sensors contain their own data in the data memory which
becomes available directly in the sensor data when the sensors are connected to the instrument.
Some of this data cannot be edited.
Sensor list ▶
Selection
An available sensor can be selected in the Sensor list. The individual menu lines
are then also available corresponding to the selected sensor.
Selection dialog for selecting an identified sensor for editing and displaying the
individual data.
■
■
■
■
■
k default
metal def.
pH default
temp default
etc.
Additional sensors entered by the user.
Sensor name
Editing dialog for changing the sensor name.
Sensor type
Display field for the sensor type.
■
■
■
■
■
Order number
pH Meter/Conductometer
pH electrode
Conductivity
Metal electrode
Temp. sensor
Other sensor...
Editing dialog for entering/modifying the Order number.
■■■■■■■■ 43
■■■■■■■■■■■■■■■■■■■■■■
4.7 Menu dialogs
Only displayed for iTrodes.
Serial number
Editing dialog for entering/modifying the Serial number.
Only displayed for iTrodes.
pH Slope
Editing dialog for entering/modifying the Slope.
■
pH pH(0)
Editing dialog for entering/modifying pH(0).
■
K
Cell constant
Default value: 100.00 / input range: 0.10 - 990.00%
Default value: 7,000 / input range: –99,999 - +99,999
Editing dialog for entering/modifying the Cell constant.
■
Default value: 1.00/cm / input range: 0.001 - 500.0/cm
Calibration
temp.
Display field indicating the temperature in °C from the last calibration.
K
Reference temp.
Display field indicating the reference temperature in °C.
K
Temp. compens.
Display field indicating the value for temperature compensation of the last calibration.
■
Default value: 2.07%/°C / input range: 0.00 - 9.99%/°C
Temp. calibration
Display field indicating the measurement method for temperature measurement
of the last calibration.
Calibration date
Display field for the last Calibration date.
Calibration time
Display field for the last Calibration time.
Calibration
interval
Editing dialog for entering time in days for the Calibration interval.
■
■
Temp. sensor
Selection dialog to indicate the temperature sensor type for the respective sensor.
■
■
pH Slope limit value
44 ■■■■■■■■
Default value: off / input range: 1 - 999 d
off disables the Calibration interval.
Pt1000: is the default value
NTC
– R(25°C)
Editing dialog
Default value: 30,000 Ω / input range: 10,000 - 100,000 Ω
– B value
Editing dialog
Default value: 4,100 Κ / input range: 1,000 - 9,999 Κ
Selection dialog for selecting whether the limit value is to be applied.
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
■
■
pH Slope lower limit
Editing dialog for entering the lower limit value.
■
Slope upper
pH limit
Limit value
pH pH(0)
■
pH(0) upper
K
Limit value c
■
■
c upper limit
Sensor type
on
off: is the default value
Editing dialog for entering the lower limit value.
Default value: 0.400/cm / input range: 0.001 - 500/cm
Editing dialog for entering the upper limit value.
■
New sensor ▶
Default value: 8.00 / input range: 0.00 - 99.99
Selection dialog for selecting whether the limit value is to be applied.
■
K
Default value: 6.40 / input range: 0.00 - 99.99
Editing dialog for entering the upper limit value.
■
c lower limit
on
off: is the default value
Editing dialog for entering the lower limit value.
■
K
Default value: 103.00 / input range: 1.0 - 999.9%
Selection dialog for selecting whether the limit value is to be applied.
■
pH limit
Default value: 95.00 / input range: 1.0 - 999.9%
Editing dialog for entering the upper limit value.
■
pH pH(0) lower limit
on
off: is the default value
Default value: 0.550/cm / input range: 0.001 - 500/cm
Menu dialog with the individual menu lines for entering a new sensor.
Selection dialog for the sensor type.
■
■
■
■
■
pH electrode
Conductivity
Metal electrode
Temp. sensor
Other sensor...
Sensor name
Editing dialog for entering sensor name.
Order number
Editing dialog for entering Order number.
Serial number
Editing dialog for entering Serial number.
pH Slope
pH Meter/Conductometer
Editing dialog for entering/modifying the Slope.
■■■■■■■■ 45
■■■■■■■■■■■■■■■■■■■■■■
4.7 Menu dialogs
■
Default value: 100.00 / input range: 0.10 - 999.99%
pH pH(0)
Editing dialog for entering/modifying pH(0).
K
Editing dialog for entering/modifying the Cell constant.
Cell constant
■
Calibration
interval
Editing dialog for entering time in days for the Calibration interval.
■
■
Temp. sensor
■
■
Slope upper
Limit value
pH pH(0)
■
pH(0) upper
K
Limit value c
■
on
off: is the default value
Editing dialog for entering the lower limit value.
Default value: 6.40 / input range: 0.00 - 99.99
Editing dialog for entering the upper limit value.
■
Default value: 8.00 / input range: 0.00 - 99.99
Selection dialog for selecting whether the limit value is to be applied.
■
46 ■■■■■■■■
Default value: 103.00 / input range: 1.0 - 999.9%
Selection dialog for selecting whether the limit value is to be applied.
■
pH limit
Default value: 95.00 / input range: 1.0 - 999.9%
Editing dialog for entering the upper limit value.
■
pH pH(0) lower limit
on
off: is the default value
Editing dialog for entering the lower limit value.
■
pH limit
Pt1000
NTC
– R(25°C)
Editing dialog
Default value: 30,000 Ω / input range: 10,000 - 100,000 Ω
– B value
Editing dialog
Default value: 4,100 Κ / input range: 1,000 - 9,999 Κ
Selection dialog for selecting whether the limit value is to be applied.
■
pH Slope lower limit
Default value: off / input range: 1 - 999 d
off disables the Calibration interval.
Selection dialog to indicate the temperature sensor type for the respective sensor.
■
pH Slope limit value
Default value: 1.00/cm / input range: 0.001 - 500/cm
on
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
■
K
c lower limit
Editing dialog for entering the lower limit value.
■
K
c upper limit
Default value: 0.400/cm / input range: 0.001 - 500/cm
Editing dialog for entering the upper limit value.
■
Delete sensor
off: is the default value
Default value: 0.550/cm / input range: 0.001 - 500/cm
Selection dialog for deleting a sensor.
The data will be irreversibly deleted.
4.7.5
Report
The Report menu dialog is shown below with the structure and the
description.
NOTE
Printer
pH Meter/Conductometer instruments support various printer types for
report output. If your printer is not listed, please use the printer
Universal (ESC-POS), which has appropriate setting parameters.
Report
Selection dialog for data output in the Report.
■
■
■
■
■
■
■
■
■
■
Line feed
Editing dialog to indicate the lines to be inserted at the end of the report.
■
Printer
Default value: 2 lines / input range: 0 - 99 lines
Selection dialog to indicate the printer for report output.
■
■
■
pH Meter/Conductometer
Calibration pH
Calibration pH IS
Calibration κ
Sensors
Configuration
Parameters pH
Parameters pH IS
Parameters κ
Meas. values
All reports
HP Officejet Pro
Page printer with paper size A4
HP Laserjet Pro
Page printer with paper size A4
Epson (ESC-POS)
Roll printer with paper width 80 mm
■■■■■■■■ 47
■■■■■■■■■■■■■■■■■■■■■■
4.7 Menu dialogs
■
■
■
■
4.7.6
Seiko (ESC-POS)
Roll printer with paper width 110 mm
Citizen ESC-POS)
Roll printer with paper width 80 mm
Custom (ESC-POS)
Roll printer with paper width 60 mm
Universal (ESC-POS)
Universal roll printer with variable settings:
– Paper width
50 - 200 mm
– Print resolution
100 - 600 dpi
– Print type
Line or Matrix
Configuration
The Configuration menu dialog for all instrument settings is shown
below with the structure and the description.
Last decimal place
Selection dialog for selecting whether the Last decimal place is displayed for
the pH measured values with three digits at most.
Drift value monitoring is not influenced by this setting.
■
■
Date
on: Last decimal place is displayed.
off: Last decimal place is not displayed.
Editing dialog for entering the system date.
Date format: YYYY-MM-DD
Time
Editing dialog for entering the system time.
Time format: hh:mm:ss
Power off after
Editing dialog for entering the time for the function Power off after x
minutes. The instrument shuts down automatically after this time.
This function is disabled while the instrument is charged and during time-dependent recording of measured values with a set time interval.
■
■
Turn off LCD after
Default value: 15 / input range: 1 - 60, or
off for continuous operation.
Editing dialog for entering the time for the function Turn off LCD after x
minutes. The display turns off after this time and can be turned back on again
with any key other than the
■
■
■
48 ■■■■■■■■
key.
Default value: 15 / input range: 1 - 60, or
auto for dimming after 20 seconds and switching off the display after
another 60 seconds.
off for continuous operation.
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
Brightness
4 Operation
Selection dialog for the display Brightness.
■
■
■
■
■
100 %
80 %
60 %
40 %
20 %
Program version
Display field for the current Program version.
Language
Selection dialog for selecting the instrument Language.
■
■
■
■
■
■
Change password
German
English: default factory setting
Español
Français
Português
中文
Editing dialog for customizing the password for the Expert user rights.
The default setting ex works is Expert.
1.
2.
3.
Service/Diagnosis ▶
Password
4.7.7
Old password
New password
Confirm
Menu dialog with password-protected access for Metrohm Service.
Password entry for the Service/Diagnosis menu functions.
User
The User menu dialog for setting user restrictions and user data is shown
below with the description.
User
Editing dialog for entering the user name.
The entered value is only displayed in the one-channel main screen.
Dialog type
Selection dialog for the Dialog type.
■
■
pH Meter/Conductometer
Expert
In the Dialog type Expert, all functions are unlocked.
When changing from Routine to Expert, you have to enter a Password to
unlock the locked menu structure.
Routine
In the Dialog type Routine, the following sections in the menu are disabled:
– Sensors
– Configuration
■■■■■■■■ 49
■■■■■■■■■■■■■■■■■■■■■■
4.8 pH measurement
4.8
pH measurement
This chapter describes the required steps to carry out a simple pH measurement with calibration. The description is limited to only the indispensable steps and will enable you to carry out first measurements with the
instrument directly.
4.8.1
pH electrode calibration
NOTE
Measuring channel selection
In order to perform the calibration, you have to select the corresponding measuring channel in the main dialog.
You cannot perform a calibration in the two-channel view in the main
dialog.
pH calibration
By default, the calibration parameters are set for calibration with two
Metrohm buffer solutions (see Chapter 4.7.1, page 38). If you would like
to use other buffers, you have to select the corresponding buffer type and
the number of buffer solutions.
If the Report selection dialog is set to on in the Calibration param.
menu dialog, then the calibration data will be output immediately.
1 Starting the calibration with the first buffer solution
■
■
■
■
Start the calibration with the
key.
Rinse the pH electrode with water and immerse it in the first buffer solution and then confirm with the
key.
The calibration temperature is measured with the connected temperature sensor and added to the calibration data.
If no temperature sensor is connected, then the temperature has
to be entered manually.
The first buffer solution is measured.
2 Continuing the calibration with second buffer solution
■
50 ■■■■■■■■
Remove the pH electrode from the first buffer solution and rinse
with water.
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
■
Immerse the pH electrode in the second buffer solution and con-
■
tinue the calibration procedure with the
The second buffer solution is measured.
key.
NOTE
Buffer exchange
If the buffer solution was not exchanged, then the message
912-181 Same buffer will appear.
Exchange the buffer solution and continue the calibration with the
key.
3 Result of the calibration
■
The result of the calibration is displayed in a diagram.
■
Finish the calibration with the
key.
(The instrument will automatically change to the main dialog after
30 seconds.)
NOTE
Limit values exceeded
If the calibration data is outside the limits defined as calibration
parameters, a corresponding message will be displayed.
You can then accept this calibration data nevertheless with the
key, or you can reject it with the
ing calibration data.
pH Meter/Conductometer
key and use the exist-
■■■■■■■■ 51
■■■■■■■■■■■■■■■■■■■■■■
4.8 pH measurement
4.8.2
Measurement
NOTE
Measured value criteria
You can set the various criteria for defining the measured value determination as follows (see Chapter 4.7.3, page 40):
1 Selecting the printout criterion
■
If the measured value found is to be directly printed out as a measured value report, then you have to set the required printout criterion (see Chapter 4.5.3, page 27).
2 Selecting the measured value criterion
■
This criterion defines the conditions as to when the measured
value is saved on the instrument and/or printed out.
3 Carrying out the measurement
■
Rinse the sensor with water and immerse it in the sample.
■
Select the Print/save measured value button with the
keys.
Trigger printing and/or saving of the measured value with the
■
key.
52 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
NOTE
Measured value recording
Depending on the settings of the measured value criterion, the
recording of the measured value may take some time. During the
measurement, hold the sensor steady and do not touch the sample vessel with it.
For measurements that take longer, we recommend using a stand
to secure the sensor in place.
Finishing measurements
After the last measurement, rinse the sensor and follow the storage instructions for the sensor.
4.9
Conductivity measurement
This chapter describes the required steps to carry out a simple conductivity
measurement with calibration. The description is limited to only the indispensable steps and will enable you to carry out first measurements with
the instrument directly.
4.9.1
Determination of the cell constant (calibration)
NOTE
Measuring channel selection
In order to perform the calibration, you have to select the corresponding measuring channel in the main dialog.
You cannot perform a calibration in the two-channel view in the main
dialog.
Determination of the cell constant
The calibration parameters are set to default values (see Chapter 4.7.2,
page 39).
If the Report selection dialog is set to on in the Calibration param.
menu dialog, then the calibration data will be output immediately.
1 Starting the calibration
pH Meter/Conductometer
■■■■■■■■ 53
■■■■■■■■■■■■■■■■■■■■■■
4.9 Conductivity measurement
■
■
■
■
■
■
■
Start the calibration with the
key.
Rinse the conductivity sensor with water and immerse it in the
first standard solution and then confirm with the
key.
The calibration temperature is measured with the connected temperature sensor and added to the calibration data.
If no temperature sensor is connected, then the temperature has
to be entered manually.
Enter the reference temperature for the standard solution.
Enter the conductivity value of the standard solution at the reference temperature.
Enter the coefficient for the current temperature and the selected
reference temperature for temperature compensation.
Trigger the calibration with the standard solution with the
key.
2 Result of the calibration
■
■
The result of the calibration (cell constant) is recorded and stored
for the respective sensor.
Calibration is completed and the instrument will automatically
change back to the main dialog after 30 seconds.
NOTE
Limit values exceeded
If the calibration data is outside the limits defined as calibration
parameters, a corresponding message will be displayed.
You can then accept this calibration data nevertheless with the
key, or you can reject it with the
4.9.2
key.
Measurement
NOTE
Measured value criteria
You can set the various criteria for defining the measured value determination as follows (see Chapter 4.7.3, page 40):
1 Selecting the printout criterion
54 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
■
If the measured value found is to be directly printed out as a measured value report, then you have to set the required printout criterion (see Chapter 4.5.3, page 27).
2 Selecting the measured value criterion
■
This criterion defines the conditions as to when the measured
value is saved on the instrument and/or printed out.
3 Carrying out the measurement
■
Rinse the sensor with water and immerse it in the sample.
■
Select the Print/save measured value button with the
keys.
Trigger printing and/or saving of the measured value with the
■
key.
NOTE
Measured value recording
Depending on the settings of the measured value criterion, the
recording of the measured value may take some time. During the
measurement, hold the sensor steady and do not touch the sample vessel with it.
For measurements that take longer, we recommend using a stand
to secure the sensor in place.
Finishing measurements
After the last measurement, rinse the sensor and follow the storage instructions for the sensor.
pH Meter/Conductometer
■■■■■■■■ 55
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4.10 Issuing reports/measured values
4.10
Issuing reports/measured values
The pH Meter/Conductometer supports output of various printouts and
data transfers for displaying the calibration and measured values.
4.10.1
Printing out
The printouts are divided into various groups:
■
■
Printing out values directly after generation:
– Calibration data
Calibration data can be printed out if on is selected under:
Menu ▶ Parameters X ▶ Calibration param. ▶ Report
– Measured values
You can print out the measured values directly using the
or
button.
Printing out saved values in the following areas as reports:
– Calibration
– Sensors
– Configuration
– Parameter
– Measured values
Report data can be printed using the Report selection dialog under:
Menu ▶ Report
NOTE
The value "dpH" indicates the difference between nominal value of the
buffer (by interpolating between two values from the buffer table) and
the pH value resulting from the measured voltage from the calibration
lines.
4.10.2
PC/LIMS and CSV data transfer
NOTE
USB cable
Data can be transferred to a PC connected using the supplied USB cable
(6.2151.110).
The optional USB Y cable (6.2151.140) cannot be used.
56 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
4 Operation
NOTE
Data output
For data output, the setting save or print+save is required when
recording measured values so that this data is saved on the instrument.
Data generation
The measured value data has to be re-generated before every data
transfer.
The data on the instrument memory can be saved in two data formats:
PC/LIMS report
Data in PC/LIMS format can be imported into and processed in the
Metrohm program tiBase for evaluation.
NOTE
Data collision
Transferring data from several instruments can lead to a data collision in
tiBase.
■
You should create an individual database for each measuring instrument in tiBase.
CSV file
CSV data can be imported as text data in MS Excel and processed for
evaluation.
The following parameters are required for text conversion:
■
■
■
pH Meter/Conductometer
Data type = separated with a semicolon
Data source = Unicode (UTF-8)
Data format of the columns = standard
■■■■■■■■ 57
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4.10 Issuing reports/measured values
Generating/transferring report data
NOTE
USB interface
If the report data is to be generated while the instrument is connected
to the PC, then the connection is briefly interrupted.
After the report data has been generated, the connection will be automatically established again.
1 Generating report data
You can generate the report data by selecting:
save as PC/LIMS or save as CSV
under Menu ▶ Measured values ▶ Values.
2 Connecting the instrument to the PC
Connect the instrument to the PC using the supplied USB cable
(6.2151.110).
The instrument is automatically recognized as a removable drive.
3 Transferring report data
The generated files are stored in the instrument as follows and can
be transferred to the PC for evaluation and report generation:
■
■
58 ■■■■■■■■
PCLIMS_X.UTF8 is in the PCLIMS directory
MEASREPORT.CSV is in the CSV directory
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
5 Operation and maintenance
5 Operation and maintenance
5.1
General notes
5.1.1
Care
pH Meter/Conductometer instruments require appropriate care. Excess
contamination of the instruments may result in functional disruptions and
a reduction in the service life of the otherwise sturdy mechanics and electronics.
Spilled chemicals and solvents should be removed immediately. In particular, the plug connections should be protected from contamination.
CAUTION
Although this is largely prevented by design measures, Metrohm Service
should immediately be notified if aggressive media have found their
way into the instrument.
5.1.2
Maintenance by Metrohm Service
Maintenance of the pH Meter/Conductometer is best carried out as
part of annual service, which is performed by specialist personnel from
Metrohm. A shorter maintenance interval may be necessary if you frequently work with caustic and corrosive chemicals.
Metrohm Service offers every form of technical advice for maintenance
and service of all Metrohm instruments.
5.1.3
Sensor care
Sensors are sensitive and require appropriate handling and care.
NOTE
Sensor leaflet
Handling, care and storage are important factors for the correct and
accurate functioning of sensors.
Therefore, please note the specific information on the respective sensor
leaflets.
You can download the leaflets from the Internet at
http://www.metrohm.com.
pH Meter/Conductometer
■■■■■■■■ 59
5.2 Quality management and qualification with Metrohm
5.2
■■■■■■■■■■■■■■■■■■■■■■
Quality management and qualification with
Metrohm
Quality management
Metrohm offers you comprehensive support in implementing quality management measures for instruments and software.
Qualification
Please contact your local Metrohm representative for support in qualification of instruments and software. The Installation Qualification (IQ)
and Operational Qualification (OQ) are offered by Metrohm representatives as a service. They are carried out by trained employees using standardized qualification documents and in accordance with the currently
applicable requirements of the regulated industry.
Maintenance
The electronic and mechanical modules of Metrohm instruments can and
should be checked by specialist personnel from Metrohm as part of a regular preventive maintenance schedule. Please ask your local Metrohm representative regarding the precise terms and conditions involved in concluding a corresponding maintenance agreement.
For detailed information on this topic, please visit www.metrohm.com.
60 ■■■■■■■■
pH Meter/Conductometer
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6 Troubleshooting
6 Troubleshooting
6.1
General
If you experience problems during measurements, then you can check the
following aspects to eliminate them:
Application
Difficult sample matrices or interfering influences may render accurate
measurements impossible (e.g. insufficient ionic strength, presence of
interfering ions, etc.).
Our Application Bulletins and Application Notes will support you in
choosing the appropriate analysis conditions and configuring the instrument method.
Buffer solutions /
standard solutions
The precision of the measurements mainly depends on the correct calibration of the sensors. To do so, you should use clean and fresh buffer or
standard solutions.
A common cause of incorrect calibrations is, for example, the use of an
old pH 10 or pH 12 buffer. The pH value of such buffers may markedly
deviate from the certified pH value of a new buffer as a result of the introduction of CO2 from the air.
Sensors
The sensors are the most important component in the entire measuring
system.
For the correct handling of sensors, please read the corresponding leaflets.
Device
If the pH Meter/Conductometer might be the cause of a measuring
problem, check all configuration and parameter settings first.
The pH Meter/Conductometer will notify you of problems with respective messages directly during operation.
You can find an explanation of these messages in the chapter Messages.
(see Chapter 6.4, page 65)
pH Meter/Conductometer
■■■■■■■■ 61
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6.2 Problems
6.2
Problems
The following list describes some general problems that might occur during measurements. Furthermore, the possible causes and solution
approaches are described.
NOTE
Sensor treatment
Follow the instructions given in the respective leaflets for sensors cleaning and maintenance.
6.2.1
Troubleshooting
Problem
Cause
Remedy
Measured value setting is sluggish.
The glass membrane or the
diaphragm is contaminated.
■
Clean the electrode following the instructions in the leaflet.
No measuring signal.
The sensor is not connected.
■
Connect the sensor.
Wrong measuring channel
is selected.
■
Select the correct measuring channel.
The sensor is defective.
■
Replace the sensor.
The cable is defective.
■
Replace the cable.
The electrode's reference
system contains air.
■
Perform an electrode maintenance as
described in the leaflet.
The measuring input and/
or the measuring channel
is defective.
■
Send the measuring instrument to the
Metrohm Service for inspection and, if necessary, repair.
The instrument does
not start.
The instrument battery is
not charged.
■
Connect the instrument to the power supply unit to charge it.
The battery is only charged when the
instrument is on.
(total charging time: approx. 9 hours)
The measured value
drift criterion is not
fulfilled.
The glass membrane or the
diaphragm is contaminated.
■
Clean the electrode following the instructions in the leaflet.
62 ■■■■■■■■
pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■
Problem
The measured value
is evidently wrong.
6 Troubleshooting
Cause
Remedy
The pH value or the temperature of the measuring
solution is not stable.
■
■
Measure under exclusion of air.
Regulate the measuring solution's temperature.
Conductivity is too low
because of an unsuitable
sensor.
■
Use a suitable sensor.
Measurement takes place
in an organic solution.
■
Use a suitable sensor.
Non-Metrohm power supply unit used for charging
the battery.
■
Use only the supplied power supply unit
during measurement operation.
pH calibration is faulty.
■
Check/repeat calibration.
Check/replace the buffer.
Check the buffer selection in the settings.
■
■
Conductivity calibration is
faulty.
■
■
■
■
The slope is insufficient during calibration.
pH Meter/Conductometer
Check/repeat calibration.
Check the value for the standard.
Check the value for the reference temperature.
Check the value for temperature compensation.
The temperature input is
wrong.
■
Enter the correct measuring temperature.
The wrong temperature
sensor type is selected.
■
Check the temperature sensor type (Pt1000
or NTC) and select the correct one, if necessary.
The glass membrane or the
diaphragm is contaminated.
■
Clean the membrane or the diaphragm following the instructions in the corresponding leaflet.
The electrolyte is overaged.
■
Replace the electrolyte.
The sensor is defective.
■
Replace the sensor.
The glass membrane or the
diaphragm is contaminated.
■
Clean the electrode following the instructions in the leaflet.
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6.3 Restarting/resetting the instrument
Problem
Cause
Remedy
No hydrated layer is present on the glass membrane
after measurements in
water-free solutions.
■
Hydrate the electrode between the measurements.
The buffer solutions are not
OK.
■
Replace the buffer solutions.
The sensor is "worn out".
■
Replace the sensor.
6.3
Restarting/resetting the instrument
6.3.1
Instrument reset
In case of a malfunction, the instrument might not work correctly anymore and not be switched off.
You can switch off the instrument using the following key combination
for approx. two seconds:
■
■
+
The instrument can be switched on again.
NOTE
Data storage
The currently measured data and modified settings cannot be saved if
the instrument is reset.
6.3.2
Resetting the instrument to factory settings
This function deletes all user data on the instrument. Afterwards, the
instrument will be in the state as delivered from the manufacturer with the
default settings.
CAUTION
User data
The user data will be irreversibly deleted.
You can reset the instrument with the following key combination during
startup:
64 ■■■■■■■■
pH Meter/Conductometer
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■
■
6.4
6 Troubleshooting
+
Afterwards, a message will be displayed saying that the user data has
been deleted.
Messages
The instruments notify you of possible errors or operation problems with
various specific messages. A message as shown in the following example
will appear on the current display.
Figure 18
Example of a message
1
Message number and message
2
Symbol
3
Message text
4
Remedy
NOTE
Message number
Each message contains a message number in the top left-hand corner.
Please indicate this number in the case of queries or complaints.
pH Meter/Conductometer
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7.1 Saved buffer series
7 Appendix
7.1
Saved buffer series
The temperature-dependent pH values of the most important commercially available pH buffer solutions are stored in pH Meter/Conductometer instruments for automatic buffer recognition during pH calibration.
In addition to the Metrohm buffer solutions, other reference buffers are
also included in the tables.
CAUTION
Buffer quality
The precision of pH measurements mainly depends on the correct calibration of the measuring chain. To do so, you should use clean and
fresh buffer solutions. A common cause of incorrect calibration is, for
example, the use of an old pH 10 or pH 12 buffer. The pH value of a
buffer solution may markedly deviate from the certified pH value of a
new buffer solution as a result of the introduction of CO2 from the air.
The following tables provide an overview of the stored pH(T) series:
NOTE
pH values printed in bold are the values for the reference temperature
of the respective buffer set.
pH values highlighted in italics are interpolated or extrapolated values.
The other pH values correspond to the manufacturer's specifications.
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7.1.1
7 Appendix
Metrohm
Table 6
Metrohm buffer solutions
Metrohm
Temp.
pH
pH
pH
(°C)
4.00
7.00
9.00
0
3.99
7.11
9.27
5
3.99
7.08
9.18
10
3.99
7.06
9.13
15
3.99
7.04
9.08
20
3.99
7.02
9.04
25
4.00
7.00
9.00
30
4.00
6.99
8.96
35
4.01
6.98
8.93
40
4.02
6.98
8.90
45
4.03
6.97
8.87
50
4.04
6.97
8.84
55
4.06
6.97
8.81
60
4.07
6.97
8.79
65
4.09
6.98
8.76
70
4.11
6.98
8.74
75
4.13
6.99
8.73
80
4.15
7.00
8.71
85
4.18
7.00
8.70
90
4.20
7.01
8.68
95
4.23
7.02
8.67
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
pH Meter/Conductometer
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7.1 Saved buffer series
7.1.2
NIST (according to DIN standard 19266, 2000)
Table 7
NIST buffer solutions
NIST (according to DIN standard 19266, 2000)
Temp.
pH
pH
pH
pH
pH
(°C)
1,680
4,008
6,865
9,184
12,454
0
-
4,010
6,984
9,464
13,423
5
1,668
4,004
6,950
9,392
13,207
10
1,670
4,001
6,922
9,331
13,003
15
1,672
4,001
6,900
9,277
12,810
20
1,676
4,003
6,880
9,228
12,627
25
1,680
4,008
6,865
9,184
12,454
30
1,685
4,015
6,853
9,144
12,289
35
1,691
4,025
6,843
9,107
12,133
40
1,697
4,036
6,837
9,076
11,984
45
1,704
4,049
6,834
9,046
11,841
50
1,712
4,064
6,833
9,018
11,705
55
1,715
4,075
6,834
8,985
11,574
60
1,723
4,091
6,836
8,962
11,449
65
1,732
4,108
6,840
8,941
-
70
1,743
4,126
6,845
8,921
-
75
1,754
4,145
6,852
8,902
-
80
1,766
4,164
6,859
8,885
-
85
1,778
4,185
6,867
8,867
-
90
1,792
4,205
6,877
8,850
-
95
1,806
4,227
6,886
8,833
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept as up to date as possible.
However, they may be changed by the respective manufacturers.
The NIST buffers are identical to the buffer solutions that are used in
Chinese pharmacopoeia.
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pH Meter/Conductometer
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7.1.3
7 Appendix
DIN (according to DIN standard 19267, 2012)
Table 8
DIN buffer solutions
DIN (according to DIN standard 19267, 2012)
Temp.
pH
pH
pH
pH
pH
pH
(°C)
1.09
3.06
4.65
6.79
9.23
12.75
0
1.08
-
4.67
6.89
9.48
-
5
1.08
-
4.66
6.86
9.43
-
10
1.09
3.10
4.66
6.84
9.37
13.37
15
1.09
3.08
4.65
6.82
9.32
13.15
20
1.09
3.07
4.65
6.80
9.27
12.96
25
1.09
3.06
4.65
6.79
9.23
12.75
30
1.10
3.05
4.65
6.78
9.18
12.61
35
1.10
3.05
4.66
6.77
9.13
14.44
40
1.10
3.04
4.66
6.76
9.09
12.29
45
1.10
3.04
4.67
6.76
9.04
12.13
50
1.11
3.04
4.68
6.76
9.00
11.98
55
1.11
3.04
4.69
6.76
8.97
11.84
60
1.11
3.04
4.70
6.76
8.92
11.69
65
1.11
3.04
4.71
6.76
8.90
11.56
70
1.11
3.04
4.72
6.76
8.88
11.43
75
1.12
3.04
4.74
6.77
8.86
11.30
80
1.12
3.05
4.75
6.78
8.85
11.19
85
1.12
3.06
4.77
6.79
8.83
11.08
90
1.13
3.07
4.79
6.80
8.82
10.99
95
-
-
-
-
-
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
pH Meter/Conductometer
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7.1 Saved buffer series
7.1.4
Fisher
Table 9
Fisher buffer solutions
Fisher
Temp.
pH
pH
pH
pH
(°C)
2.00
4.00
7.00
10.00
0
-
4.01
7.13
10.34
5
1.98
3.99
7.10
10.26
10
1.98
4.00
7.07
10.19
15
2.02
3.99
7.05
10.12
20
2.00
4.00
7.02
10.06
25
2.00
4.00
7.00
10.00
30
2.00
4.01
6.99
9.94
35
2.02
4.02
6.98
9.90
40
2.01
4.03
6.97
9.85
45
2.01
4.04
6.97
9.81
50
2.01
4.06
6.97
9.78
55
-
4.07
6.97
9.74
60
-
4.09
6.98
9.70
65
-
4.11
6.99
9.68
70
-
4.13
7.00
9.65
75
-
4.14
7.02
9.63
80
-
4.16
7.03
9.62
85
-
4.18
7.06
9.61
90
-
4.21
7.08
9.60
95
-
4.23
7.11
9.60
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
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7.1.5
7 Appendix
Mettler Toledo
Table 10
Mettler Toledo buffer solutions
Mettler Toledo
Temp.
pH
pH
pH
pH
pH
(°C)
2.00
4.01
7.00
9.21
11.00
0
2.03
4.01
7.12
9.52
11.90
5
2.02
4.01
7.09
9.45
11.72
10
2.01
4.00
7.06
9.38
11.54
15
2.00
4.00
7.04
9.32
11.36
20
2.00
4.00
7.02
9.26
11.18
25
2.00
4.01
7.00
9.21
11.00
30
1.99
4.01
6.99
9.16
10.82
35
1.99
4.02
6.98
9.11
10.64
40
1.98
4.03
6.97
9.06
10.46
45
1.98
4.04
6.97
9.03
10.28
50
1.98
4.06
6.97
8.99
10.10
55
1.98
4.08
6.98
8.96
-
60
1.98
4.10
6.98
8.93
-
65
1.98
4.13
6.99
8.90
-
70
1.99
4.16
7.00
8.88
-
75
1.99
4.19
7.02
8.85
-
80
2.00
4.22
7.04
8.83
-
85
2.00
4.26
7.06
8.81
-
90
2.00
4.30
7.09
8.79
-
95
-
4.35
7.12
8.77
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
pH Meter/Conductometer
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7.1 Saved buffer series
7.1.6
Merck CertiPUR 20 / Titrisol
Table 11
Merck CertiPUR 20 / Titrisol buffer solutions
Merck CertiPUR 20
Temp.
pH
pH
pH
pH
pH
(°C)
2.000
4.000
7.000
9.000
12.000
0
2.010
4.050
7.130
9.240
12.580
5
2.010
4.040
7.070
9.160
12.410
10
2.010
4.020
7.050
9.110
12.260
15
2.000
4.010
7.020
9.050
12.100
20
2.000
4.000
7.000
9.000
12.000
25
2.000
4.010
6.980
8.950
11.880
30
2.000
4.010
6.980
8.910
11.720
35
2.000
4.010
6.960
8.880
11.670
40
2.000
4.010
6.950
8.850
11.540
45
2.000
4.000
6.950
8.820
11.440
50
2.000
4.000
6.950
8.790
11.330
55
2.000
4.000
6.950
8.760
11.190
60
2.000
4.000
6.960
8.730
11.040
65
2.000
4.000
6.960
8.715
10.970
70
2.010
4.000
6.960
8.700
10.900
75
2.010
4.000
6.960
8.680
10.800
80
2.010
4.000
6.970
8.660
10.700
85
2.010
4.000
6.980
8.650
10.590
90
2.010
4.000
7.000
8.640
10.480
95
-
4.000
7.020
-
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible. However, they may be
changed by the different manufacturers.
The CertiPUR 20 and Titrisol product lines have the identical values.
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7.1.7
7 Appendix
Merck CertiPUR 25
Table 12
Merck CertiPUR 25 buffer solutions
Merck CertiPUR (25°C)
Temp.
pH
pH
pH
pH
(°C)
4.00
7.00
9.00
10.00
0
-
-
-
-
5
4.05
7.09
9.22
10.22
10
4.04
7.08
9.16
10.18
15
4.02
7.04
9.10
10.10
20
4.01
7.02
9.06
10.06
25
4.00
7.00
9.00
10.00
30
3.99
6.98
8.98
9.94
35
3.98
6.98
8.93
9.90
40
3.98
6.97
8.89
9.86
45
3.98
6.97
8.86
9.80
50
3.98
6.97
8.84
9.73
55
-
-
-
-
60
-
-
-
-
65
-
-
-
-
70
-
-
-
-
75
-
-
-
-
80
-
-
-
-
85
-
-
-
-
90
-
-
-
-
95
-
-
-
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible. However, they may be
changed by the different manufacturers.
pH Meter/Conductometer
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7.1 Saved buffer series
7.1.8
Beckmann
Table 13
Beckmann buffer solutions
Beckmann
Temp.
pH
pH
pH
(°C)
4.00
7.00
10.01
0
4.00
7.12
10.32
5
4.00
7.09
10.25
10
4.00
7.06
10.18
15
4.00
7.04
10.12
20
4.00
7.02
10.06
25
4.00
7.00
10.01
30
4.01
6.99
9.97
35
4.02
6.99
9.93
40
4.03
6.98
9.89
45
4.05
6.98
9.86
50
4.06
6.97
9.83
55
4.08
6.98
-
60
4.09
6.98
-
65
4.11
6.99
-
70
4.12
6.99
-
75
4.14
7.00
-
80
4.16
7.00
-
85
4.18
7.01
-
90
4.19
7.02
-
95
4.21
7.03
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
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7.1.9
7 Appendix
Radiometer Analytical
Table 14
Radiometer Analytical buffer solutions
Radiometer Analytical
Temp.
pH
pH
pH
pH
(°C)
1.679
4.005
7.000
9.180
0
1.666
4.000
7.118
9.464
5
1.668
3.998
7.087
9.395
10
1.670
3.997
7.059
9.332
15
1.672
3.998
7.036
9.276
20
1.675
4.001
7.016
9.225
25
1.679
4.005
7.000
9.180
30
1.683
4.011
6.987
9.139
35
1.688
4.018
6.977
9.102
40
1.694
4.027
6.970
9.068
45
1.700
4.038
6.965
9.038
50
1.707
4.050
6.964
9.011
55
1.715
4.064
6.965
8.985
60
1.723
4.080
6.968
8.962
65
1.732
4.097
6.974
8.941
70
1.743
4.116
6.982
8.921
75
1.754
4.137
6.992
8.900
80
1.765
4.159
7.004
8.885
85
1.778
4.183
7.018
8.867
90
1.792
4.210
7.034
8.850
95
-
4.240
-
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
pH Meter/Conductometer
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7.1 Saved buffer series
7.1.10
Baker
Table 15
Baker buffer solutions
Baker
Temp.
pH
pH
pH
pH
(°C)
4.00
7.00
9.00
10.00
0
4.00
7.13
9.23
10.30
5
4.00
7.09
9.17
10.24
10
4.00
7.05
9.10
10.17
15
4.00
7.03
9.05
10.11
20
4.00
7.00
9.00
10.05
25
4.00
6.98
8.96
10.00
30
4.01
6.98
8.91
9.96
35
4.02
6.98
8.88
9.93
40
4.03
6.97
8.84
9.89
45
4.04
6.97
8.81
9.86
50
4.05
6.96
8.78
9.82
55
4.07
6.96
8.76
9.79
60
4.08
6.96
8.73
9.76
65
4.10
6.97
8.71
9.74
70
4.12
6.97
8.69
9.72
75
4.14
6.98
8.68
9.70
80
4.16
6.98
8.66
9.68
85
4.19
6.99
8.64
9.66
90
4.21
7.00
8.62
9.64
95
-
-
-
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
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7.1.11
7 Appendix
Hamilton DURACAL
Table 16
Hamilton DURACAL buffer solutions
Hamilton DURACAL
Temp.
pH
pH
pH
pH
(°C)
4.01
7.00
9.21
10.01
0
-
-
-
-
5
4.01
7.09
9.45
10.19
10
4.00
7.06
9.38
10.15
15
4.00
7.04
9.32
10.11
20
4.00
7.02
9.26
10.06
25
4.01
7.00
9.21
10.01
30
4.01
6.99
9.16
9.97
35
4.02
6.98
9.11
9.92
40
4.03
6.97
9.06
9.86
45
4.04
6.97
9.03
9.83
50
4.06
6.97
8.99
9.79
55
-
-
-
-
60
-
-
-
-
65
-
-
-
-
70
-
-
-
-
75
-
-
-
-
80
-
-
-
-
85
-
-
-
-
90
-
-
-
-
95
-
-
-
-
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
pH Meter/Conductometer
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7.1 Saved buffer series
7.1.12
Fluka
Table 17
Fluka buffer solutions
Fluka
Temp.
pH
pH
pH
(°C)
4.000
7.000
9.000
0
4.030
7.130
9.240
5
4.025
7.090
9.175
10
4.020
7.050
9.110
15
4.010
7.020
9.055
20
4.000
7.000
9.000
25
4.000
6.990
8.965
30
4.000
6.980
8.930
35
4.000
6.975
8.895
40
4.000
9.970
8.860
45
4.000
6.965
8.830
50
4.000
6.960
8.800
55
4.000
6.960
8.775
60
4.000
6.960
8.750
65
4.000
6.965
8.730
70
4.000
6.970
8.710
75
4.000
6.975
8.690
80
4.000
6.980
8.670
85
4.000
6.990
8.655
90
4.000
7.000
8.640
95
4.000
7.010
8.620
NOTE
Update
The values of the individual buffers with the corresponding temperatures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.
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pH Meter/Conductometer
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8 Technical specifications
8 Technical specifications
8.1
Measuring inputs
The four available instruments are each equipped with specific measuring
inputs.
The following table lists the measuring inputs for each instrument and the
corresponding measuring modes.
Table 18
Measuring inputs / instrument
Instrument
Measuring inputs / measuring modes
Electrode,
analog
Electrode,
digital
Conductivity
Temperature
Reference
T
x
T
x
Κ/TDS/Sal1)/ρ/T
2.912.010
2.913.010
pH/U/T
pH/U/T
2.914.010
Κ/TDS/Sal1)/ρ/T
pH/U/T
2.914.020
Κ/TDS/Sal1)/ρ/T
pH/U/T
1)
The salinity (Sal) calculation is based on the specifications in the
"Unesco technical papers in marine science 36" under the title
"Tenth report of the joint panel on oceanographic tables and standards".
> 1 * 1012 Ohm (under reference conditions)
Input resistance
Table 19
Specification of the measuring inputs
Measuring range
Resolution
Measuring accuracy 2)
–13,000…+20,000
0.001 pH
±0.003 pH
Pt1000
–150°C - +250°C
0.1°C
±0.2°C (–20°C - +150°C)
with iConnect
–150°C - +250°C
0.1°C
±0.4°C (–20°C - +150°C)
NTC 30 kΩ
–5°C - +250°C
0.1°C
±0.6°C (+10°C - +40°C)
Supply voltage
–1200.0 mV - +1200.0 mV
0.1 mV
±0.2 mV
Conductance 3)
0.1 µS - 500 mS
4 significant places
±0.5% at 0.1 µS - 16 µS
pH value
Temperature:
±0.5% at 16 µS - 1 mS
±1.0% at 1 mS - 500 mS
2)
±1 digit, without sensor error, at reference conditions
3)
To obtain the conductivity, the corresponding value must be multiplied
by the cell constant. The indicated values apply for c = 1/cm.
pH Meter/Conductometer
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8.2 Measured value memory
Display interval of the measurement = 1 s
8.2
Measured value memory
Memory size
■
■
8.3
10,000 measured values, non-volatile memory
10 sensor entries in sensor list
TFT display
Resolution
320 x 240 pixels (RGB)
Display colors
16.7 million
Display size
3.5 inches (70.08 x 52.56 mm)
8.4
Interfaces
USB connector
Type A/B mini USB connector (USB 2.0) with the following functions:
Power supply
■ Data transmission
with USB cable (6.2151.110)
■ Print
with USB Y cable (6.2151.140)
■
8.5
Power supply
Lithium polymer
accumulator
3.7 V, 3000 mAh
The accumulator cannot be replaced by the user.
USB connector
Nominal input
voltage
5 V ±5% DC
Power consumption
850 mA max.
Power consumption at PCUSB
500 mA
Power supply unit
No. 6.2166.100 (Accessories)
Nominal input
voltage
100 - 240 V AC
Frequency
50 - 60 Hz
Output voltage
5.25 V DC
Nominal output
current
1530 mA max.
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pH Meter/Conductometer
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8 Technical specifications
No. 6.2166.500 (optional accessories)
Car charger
adapter
Nominal input
voltage
12 V DC
Output voltage
5 V DC
Nominal output
current
1,000 mA
8.6
Charging time
Charging time
with power supply
unit
9 hours with original power supply unit (no. 6.2166.100) and original
USB cable
Charging time on
USB interface
15 hours
Charging time
with USB Y cable
15 hours
8.7
Runtime with accumulator
NOTE
Runtimes
The runtimes may vary according to the configuration used and the
usage habits.
The following values are based on operation under reference conditions
(see Chapter 8.12, page 83).
Uptime
pH Meter/Conductometer
8 hours
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8.8 Housing specification
8.8
Housing specification
Protection class IP
67 / DIN EN 60529
8.9
Dust-resistant and protected against temporary immersion in water
Safety specification
This instrument fulfills the following electrical safety requirements:
CE marking pursuant to the EU directive:
■ 2014/35/EU (Low Voltage Directive, LVD)
■ 2014/30/EU (EMC Directive, EMC)
Federal Inspectorate for Heavy Current Installations ESTI (Accreditation
No. SCESp 033)
■ Safety mark for certification type 2 in accordance with NEV (type
testing with market monitoring, EMC conformity)
Design and testing
According to EN/IEC/UL 61010-1, CSA-C22.2 No. 61010-1, protection
class III, EN/IEC 60529, degree of protection IP67.
Safety instructions
This document contains safety instructions which have to be followed
by the user in order to ensure safe operation of the instrument.
8.10
Emission
Electromagnetic compatibility (EMC)
Standards fulfilled:
EN/IEC 61326-1
■ EN/IEC 61000-6-3
■ EN 55011 / CISPR 11
■
Immunity
82 ■■■■■■■■
Standards fulfilled:
■ EN/IEC 61326-1
■ EN/IEC 61000-6-1
■ EN/IEC 61000-4-2
■ EN/IEC 61000-4-3
■ EN/IEC 61000-4-4
■ EN/IEC 61000-4-5
■ EN/IEC 61000-4-6
■ EN/IEC 61000-4-11
■ EN/IEC 61000-4-14
■ EN/IEC 61000-4-28
pH Meter/Conductometer
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8.11
8 Technical specifications
Ambient temperature
Operation
0°C - +40°C (at a max. of 85% humidity)
Storage and transport
0°C - +45°C (at a max. of 85% humidity)
8.12
Reference conditions
Ambient temperature
+25°C (±3°C)
Relative humidity
≤ 60%
Instrument status
> 5 min. in operation
Validity of the
data
After adjustment
8.13
Dimensions/material
Dimensions
Length
208 mm
Width
92 mm
Height
34 mm
Weight
400 g (net incl. accumulator)
Material
Housing
Acrylonitrile butadiene styrene (ABS)
Keyboard foil
Polyester (PES)
Screen cover
Polycarbonate (PC)
Interface cover
Thermoplastic elastomers (TPE-E)
pH Meter/Conductometer
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9 Accessories
Up-to-date information on the scope of delivery and on optional accessories for your instrument can be found on the Internet. You can download
this information using the article number as follows:
Downloading the accessories list
1 Type http://partslists.metrohm.com into your Internet browser.
The Partslists webpage will be displayed.
2 Select the desired output language.
3 Enter the article number (e.g. Variable Produktnummer) and click
on the Generate PDF command.
The PDF file with the accessories data will be created in the language
selected.
NOTE
When you receive your new instrument, we recommend downloading
the accessories list from the Internet, printing it out and keeping it
together with the manual for reference purposes.
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pH Meter/Conductometer
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Glossary
Glossary
Display field
Display fields are menu lines with a designation and a displayed value.
Editing dialog
In editing dialogs, you can enter or edit values (see "Editing dialog", page
21).
IS
The abbreviation IS in instruments and menus stands for Intelligent
Sensor from the iTrode line of sensors.
A chip in the sensor head saves the data, which is automatically transmitted when the sensor is connected with the instrument by means of the
854 iConnect. The measured data is transmitted digitally.
Main dialog
In the main dialog, measured values are displayed and you can trigger primary operations for measurements (see "Main dialog", page 21).
Menu dialog
Menu dialogs show an open menu structure with the corresponding
menu lines (see "Menu dialog", page 21).
Menu line
Menu lines are positions in the menu dialog that can be selected or that
display something.
Menu structure
The menu structure represents the navigation in the instrument through
the menus (see Chapter 4.6, page 33).
Selection dialog
In selection dialogs, you can select one option from a range of options
(see "Selection dialog", page 22).
dpH
Difference between nominal value of the buffer (by interpolating between
two values from the buffer table) and the pH value that results from the
measured voltage from the calibration lines (see Chapter 4.10, page 56).
pH Meter/Conductometer
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Index
Index
A
Accumulator ............................. 12
B
Brightness ................................ 49
C
Calibration .......................... 50, 53
Calibration param. .............. 38, 40
Conductivity ................... 1, 39, 53
Conductometer .......................... 8
Configuration ........................... 48
Connector .................................. 8
Control keys ............................. 24
CSV file .................................... 57
D
Date ......................................... 48
Display ..................................... 20
Editing dialog ............... 21, 29
Main dialog ............ 21, 25, 26
Menu dialog ................. 21, 28
Selection dialog ............ 22, 31
Status ................................. 23
I
Initial configuration .................. 17
Date/time ........................... 18
Language ........................... 17
Installation qualification ............ 60
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Instrument
Switch off ........................... 20
Switch on ..................... 13, 20
Instrument version ...................... 2
Interface ..................................... 3
L
Language ................................. 49
M
Maintenance agreement .......... 60
Measured values ...................... 40
Measuring parameters ........ 38, 39
Metrohm Service ...................... 59
N
New sensor .............................. 45
O
Operational qualification .......... 60
Overview of the instrument ........ 7
P
Password ............................ 32, 49
PC/LIMS report ......................... 57
pH value ................................... 38
pH/Conductometer
Analog ................................. 9
Digital .................................. 9
Potential value .......................... 38
Power supply ........................ 2, 12
Printer ...................................... 47
Printing .................................... 56
Problems .................................. 61
Q
Quality management ................ 60
R
Report ................................ 47, 56
Resistance value ....................... 39
S
Safety instructions ...................... 4
Sales version ............................... 2
Salinity ..................................... 39
Sensor ........................................ 3
Sensor list ................................. 43
Sensors .................................... 42
Service ....................................... 5
Switch off ................................. 20
Switch on ................................. 20
T
Temperature ............................. 38
Time ......................................... 48
Total Dissolved Solids ............... 39
U
User ................................... 32, 49
pH Meter/Conductometer
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