Metrohm 914pHr User Manual
pH Meter/Conductometer
912 Conductometer | 913 pH Meter | 914 pH/Conductometer
Manual
8.912.8001EN / 2014-06-30
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
8.912.8001EN / 2014-06-30
Manual
fpe
Teachware
Metrohm AG
CH-9100 Herisau
teachware@metrohm.com
This documentation is protected by copyright. All rights reserved.
Although all the information given in this documentation has been
checked with great care, errors cannot be entirely excluded. Should you
notice any mistakes please send us your comments using the address
given above.
Documentation in additional languages can be found on
http://documents.metrohm.com.
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Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.1.1 Model 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 ........................................... 6
1.4.4 Recycling and disposal ............................................................. 6
Table of contents
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 Scope of application .............................................................. 12
3.2 Power supply ...................................................................... 12
3.2.1 Charging the battery .............................................................. 13
3.2.2 Operation with power supply unit ......................................... 14
3.2.3 Operation via USB connector (PC) .......................................... 15
3.3 Connecting sensors ............................................................ 15
pH Meter/Conductometer
3.4 Connecting a printer .......................................................... 16
3.5 Initial configuration ............................................................ 16
3.5.1 Setting the Language ............................................................. 16
3.5.2 Setting the date and time ...................................................... 17
3.6 Installing updates ............................................................... 19
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III
Table of contents
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4 Operation 21
4.1 Switching the instrument on and off ............................... 21
4.2 Displays ............................................................................... 21
4.3 Status displays .................................................................... 24
4.3.1 Battery status ........................................................................ 24
4.3.2 User rights ............................................................................. 24
4.3.3 Sensor quality for pH electrodes ............................................ 25
4.4 Control keys ........................................................................ 25
4.5 Basic operation ................................................................... 26
4.5.1 Main dialog with two measuring channels ............................. 26
4.5.2 Main dialog with one measuring channel ............................... 27
4.5.3 Operation in the main dialog ................................................. 28
4.5.4 Menu dialog .......................................................................... 29
4.5.5 Editing dialog ........................................................................ 30
4.5.6 Selection dialog ..................................................................... 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 Outputting 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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IV
5.2 Quality management and qualification with Metrohm .. 60
pH Meter/Conductometer
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6 Troubleshooting 61
7 Appendix 66
Table of contents
6.1 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
7.1 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 ............................................................................ 75
7.1.10 Baker ..................................................................................... 76
7.1.11 Hamilton DURACAL ............................................................... 77
7.1.12 Fluka ..................................................................................... 78
8 Technical specifications 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 battery ......................................................... 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
9 Warranty (guarantee) 84
pH Meter/Conductometer
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V
Table of contents
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10 Accessories 86
Glossary 88
Index 89
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VI
pH Meter/Conductometer
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Table of figures
Figure 1 pH Meter/Conductometer - front ...................................................... 7
Figure 2 912 Conductometer - connectors ...................................................... 8
Figure 3 913 pH Meter - connectors ............................................................... 8
Figure 4 914 pH/Conductometer (digital) - connectors .................................... 9
Figure 5 914 pH/Conductometer (analog) - connectors ................................... 9
Figure 6 pH Meter/Conductometer in a laboratory setup ............................... 10
Figure 7 pH Meter/Conductometer for mobile application ............................. 11
Figure 8 USB Y cable ..................................................................................... 16
Figure 9 View - main dialog .......................................................................... 22
Figure 10 View - menu dialog ......................................................................... 22
Figure 11 View - editing dialog ....................................................................... 23
Figure 12 View - selection dialog .................................................................... 23
Figure 13 Operation - main dialog, two-channel ............................................. 27
Figure 14 Operation - main dialog, one-channel ............................................. 28
Figure 15 Operation - menu dialog ................................................................. 30
Figure 16 Operation - editing dialog ............................................................... 31
Figure 17 Operation - selection dialog ............................................................. 32
Figure 18 Example of a message ..................................................................... 65
Table of figures
pH Meter/Conductometer
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VII
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1 Introduction
This manual gives you a comprehensive overview of the installation, function and operation of pH Meter/Conductometer instruments.
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/Conductometer instruments are designed for use both outdoors and indoors as well as for stationary use in the laboratory.
1 Introduction
The instruments come in four basic versions, which differ in their design
with regard to different measuring channels and respective functions.
912 Conductometer
913 pH Meter With an analog and a digital measuring channel each for measuring the
914 pH/Conductometer IS
914 pH/Conductometer
With a measuring channel for measuring the conductivity, the TDS and
the salinity.
pH value, the potential and the temperature.
With a digital measuring channel for measuring the pH value, the potential and the temperature and a measuring channel for measuring the conductivity, the TDS, the salinity and the temperature.
With an analog measuring channel for measuring the pH value, the potential and the temperature and a measuring channel for measuring the conductivity, the TDS, the salinity and the temperature.
pH Meter/Conductometer
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1
1.1 Instrument description
1.1.1 Model and sales versions
pH Meter/Conductometer instruments are available in the following
versions:
Table 1 Model versions
2.912.0010 912 Conductometer Instrument with standard
2.912.0110 912 Conductometer Mobile version with acces-
2.912.0210 912 Conductometer Laboratory version with
2.913.0010 913 pH Meter (digital/analog) Instrument with standard
2.913.0110 913 pH Meter (digital/analog) Mobile version with acces-
2.913.0210 913 pH Meter (digital/analog) Laboratory version with
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accessories
sories case
instrument base console
accessories
sories case
instrument base console
2.914.0010 914 pH/Conductometer (pH digital) Instrument with standard
2.914.0020 914 pH/Conductometer (pH analog) Instrument with standard
2.914.0110 914 pH/Conductometer (pH digital) Mobile version with acces-
2.914.0120 914 pH/Conductometer (pH analog) Mobile version with acces-
2.914.0210 914 pH/Conductometer (pH digital) Laboratory version with
2.914.0220 914 pH/Conductometer (pH analog) Laboratory version with
The accessories for a given instrument version can be created 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 battery or, in stationary use,
via a power supply unit.
accessories
accessories
sories case
sories case
instrument base console
instrument base console
NOTE
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2
pH Meter/Conductometer
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1.1.3 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.
For more information on the theoretical background, please refer to the
Metrohm monograph Electrodes in Potentiometry.
1.2 Intended use
This instrument is suitable for measuring in chemicals and flammable samples. Usage of the pH Meter/Conductometer therefore requires the user to
have basic knowledge and experience in handling toxic and caustic substances. Knowledge with respect to the application of the fire prevention
measures prescribed for laboratories is also mandatory.
1 Introduction
NOTE
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 Dialog text, parameter in the software
pH Meter/Conductometer
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3
1.4 Safety instructions
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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.
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.
CAUTION
This symbol draws attention to possible damage to
instruments or instrument parts.
NOTE
This symbol highlights additional information and
tips.
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4
pH Meter/Conductometer
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1.4.2 Electrical safety
The electrical safety when working with the instrument is ensured as part
of the international standard IEC 61010.
Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.
Never open the housing of the instrument. The instrument could be
damaged by this. There is also a risk of serious injury if live components
are touched.
There are no parts inside the housing which can be serviced or replaced
by the user.
1 Introduction
WARNING
WARNING
Supply voltage
WARNING
An incorrect mains voltage can damage the instrument.
Only operate this instrument with a mains voltage specified for it (see
rear panel of the instrument).
Battery / power supply unit
WARNING
Use the power supply unit only for its intended purpose. Inappropriate
use or use of non-approved or incompatible power supply units may
cause fires or explosions and result in the revocation of the license or
warranty.
If you think that the battery or the power supply unit has been damaged, have it checked by a service center. Do not use damaged batteries or power supply units.
pH Meter/Conductometer
Do not charge your instrument during thunderstorms.
Do not use the power supply unit outdoors.
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5
1.4 Safety instructions
1.4.3 Flammable solvents and chemicals
WARNING
All relevant safety measures are to be observed when working with
flammable solvents and chemicals.
￭ Set up the instrument in a well-ventilated location (e.g. fume cup-
board).
￭ Keep all sources of flame far from the workplace.
￭ Clean up spilled liquids and solids immediately.
￭ Follow the safety instructions of the chemical manufacturer.
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.
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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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6
pH Meter/Conductometer
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2 Overview of the instrument
2 Overview of the instrument
Figure 1 pH Meter/Conductometer - front
Connectors / interfaces
1
With a cover cap for the USB interface and
the digital interface.
Display
3
For measured values and menus (see Chapter 4.2, page 21).
Eyelet for carrying strap
5
As accessory for mobile applications.
pH Meter/Conductometer
Sensor holder slot
2
For mobile applications, a sensor holder may
be inserted here.
Keypad
4
With a total of eight keys to operate the
instrument (see Chapter 4.4, page 25).
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7
2.1 Instrument connectors
2.1 Instrument connectors
2.1.1 912 Conductometer
Figure 2 912 Conductometer - connectors
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Conductivity measuring cell
1
Connection socket for conductivity measuring cells.
2.1.2 913 pH Meter
Figure 3
pH/mV electrode
1
Connection socket for analog pH/mV electrodes.
Type B mini USB connector
2
Connection socket for power supply, data
transmission and printing.
913 pH Meter - connectors
Temperature sensor / reference
2
3
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8
pH/mV electrode
Connection socket for 854 iConnect for
connecting iTrodes.
Type B mini USB connector
4
Connection socket for power supply, data
transmission and printing.
pH Meter/Conductometer
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2.1.3 914 pH/Conductometer IS
Figure 4 914 pH/Conductometer (digital) - connectors
2 Overview of the instrument
Conductivity measuring cell
1
Connection socket for conductivity measuring cells.
Type B mini USB connector
3
Connection socket for power supply, data
transmission and printing.
2.1.4 914 pH/Conductometer
pH/mV electrode
2
Connection socket for 854 iConnect for
connecting iTrodes.
Figure 5
pH/mV electrode
1
Connection socket for analog pH/mV electrodes.
Conductivity measuring cell
3
Connection socket for conductivity measuring cells.
pH Meter/Conductometer
914 pH/Conductometer (analog) - connectors
Temperature sensor / reference
2
Type B mini USB connector
4
Connection socket for power supply, data
transmission and printing.
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9
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.
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10
Figure 6
Electrode holder
1
Instrument base console
3
Consisting of receptacle base and support
rod.
pH Meter/Conductometer in a laboratory setup
Clamping ring
2
pH Meter/Conductometer
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2.2.2 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.
2 Overview of the instrument
Figure 7 pH Meter/Conductometer for mobile application
Electrode holder
1
The holders can be inserted from both sides
(left/right) of the instrument.
pH Meter/Conductometer
Eyelet for carrying strap
2
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11
3.1 Unpacking and inspecting the instrument
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3 Installation
3.1 Unpacking and inspecting the instrument
3.1.1 Packaging
The instrument is supplied in highly protective special 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 Scope of application
pH Meter/Conductometer instruments have been designed for mobile
application outdoors and/or in the laboratory.
Influence of weather conditions
Damage to instruments as a result of sun irradiation or temperatures
below the freezing point.
When you do not use the instrument, do not expose it to direct sunlight and to temperatures below 0 °C.
3.2 Power supply
The pH Meter/Conductometer is equipped with a built-in battery and
can thus be used for mobile applications. For stationary use in the laboratory, the instrument can be operated with a power supply unit.
Battery state of charge
You receive the battery in a partially charged state. However, you may
have to recharge it again before you can use the instrument for the first
time.
CAUTION
NOTE
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12
pH Meter/Conductometer
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3 Installation
CAUTION
Unauthorized manipulations
The instrument may be damaged as a result of unauthorized manipulations.
￭ Use for charging only 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 battery cannot be removed.
￭ Do not attempt to remove the battery from the instrument. To
replace the battery, take the instrument to your nearest authorized
Metrohm Service.
￭ Unauthorized replacement of the battery 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 25).
3.2.1 Charging the battery
NOTE
Charging the battery
The battery 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. Now switch on the instrument using the key.
3. When the battery is fully charged, disconnect the power supply unit
first from the instrument and then from the socket.
pH Meter/Conductometer
or
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13
3.2 Power supply
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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.
￭ Use a USB hub with external power supply or a suitable USB connec-
tor on the computer (PC).
￭ For mobile charging of the battery, use a car charger adapter from
the Metrohm accessories (6.2166.500).
1. Connect the USB cable first to the computer and then to your instrument.
2. Then switch on the instrument.
3. As soon as the battery is fully charged, disconnect the USB cable first
from the instrument and then from the computer.
NOTE
Battery condition
The battery 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 battery 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 may influence and interfere with the
measuring signal.
Use only the supplied power supply unit (6.2166.100) for measuring.
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14
pH Meter/Conductometer
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NOTE
Charging the battery with power supply
The battery 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 battery.
3.2.3 Operation via USB connector (PC)
Operation of the instrument with power supply 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
3 Installation
Parameter setting
Please note that if you change the sensor the sensor has to be selected
in the menu dialog Menu ▶ Parameters X ▶ Measuring parame-
ters ▶ Sensor name or a new sensor has to be entered in the sensor
list.
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
pH Meter/Conductometer
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3.4 Connecting a printer
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 works only when the
pH Meter/Conductometer is supplied by the power supply unit.
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Figure 8
USB type A
1
Power supply unit connector for power supply.
USB type B
3
Printer connector.
USB Y cable
3.5 Initial configuration
3.5.1 Setting the Language
NOTE
"Language" factory setting
On instruments delivered ex works, English is set in the language settings.
The following languages are available on the instrument:
USB type B mini
2
Instrument connector pH Meter/Conductometer.
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16
￭ German
￭ English
pH Meter/Conductometer
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3 Installation
￭ Spanish
￭ French
￭ Portuguese
￭ Chinese
Setting the Language
You can access the menu structures via the Menu item (see Figure 13,
page 27) in the main screen.
1
Select the entry point with the or arrow keys.
2
Use the key to change to the menu structures.
3
Select the Configuration menu structure with the arrow
key and change to the menu structure with the key.
4
Select the Language menu dialog with the arrow key and
change to the selection dialog with the key.
5
Select the required language with the or arrow
keys and confirm with the key.
3.5.2 Setting the date and time
NOTE
"Date/time" factory setting
The date and time values of the manufacturer are set on the instruments ex works.
In case of deep discharge of the battery, the system time will be reset
to the default value.
pH Meter/Conductometer
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17
3.5 Initial configuration
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Setting the date/time
You can access the menu structures via the Menu item (see Figure 13,
page 27) in the main screen.
1
Select the entry point with the or arrow keys.
2
Use the key to change to the menu structures.
3
Select the Configuration menu structure with the arrow
key and change to the menu structure with the key.
4
Select the Date or the Time menu dialog with the arrow
key and change to the editing dialog with the key.
￭ Date format: YYYY-MM-DD
￭ Time format: hh:mm:ss
5
Select the required character with the , , , and
arrow keys and confirm each with the key.
6
Confirm the final value with the editing element and the
key.
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pH Meter/Conductometer
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3.6 Installing updates
Stay up to date – download the latest versions of the software and programs to your pH Meter/Conductometer to benefit from new and
expanded functions. The performance of your instrument may also be
improved by software updates.
Downloading the update from the Internet
First, you have to download the data for the instrument update from the
Internet and save it on the computer (PC).
Go to http://www.metrohm.com/com/Support/Software.html.
1
Select the instrument in the list box.
2
Select the appropriate software version and save it somewhere on
3
your computer.
Extract the zip file. The two files in the SwUpdates subfolder with
4
the suffixes *.bin and *.mbin will be used for the installation.
3 Installation
NOTE
Data backup
You are recommended to create a backup of the saved data before the
update.
Use the Print out or Data transfer functions (see Chapter 4.10, page
56).
Installing the update on the instrument
For the actual installation of the update, the instrument has to be connected to the computer (PC) by means of a USB cable (6.2151.110).
The optional USB Y cable (6.2151.140) cannot be used.
Connect the USB cable to the computer and then to the instrument.
1
Switch on the instrument.
2
pH Meter/Conductometer
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19
3.6 Installing updates
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NOTE
Switching on the instrument
The USB connection works only when the instrument is on.
The instrument is recognized by the computer (PC) as a removable
drive.
Copy the two files with the suffixes *.bin and *.mbin directly into
3
the root directory of the instrument (removable drive) using a file
manager (e.g. Windows Explorer).
Switch off the instrument after the copy process has been completed
4
and disconnect it from the USB cable.
Switch on the instrument again and wait for the installation process.
5
During start-up, the instrument recognizes the new update files and
installs these automatically.
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pH Meter/Conductometer
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