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 [phone] Fax [phone] [e-mail] www.metrohm.com

pH Meter/Conductometer

912 Conductometer | 913 pH Meter |

914 pH/Conductometer

Manual

8.912.8001EN / 2014-06-30

fpe

Teachware Metrohm AG CH-9100 Herisau

[e-mail]

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.

Table of contents

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

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
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

pH Meter/Conductometer

III

Table of contents

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
5.2	Quality management and qualification with Metrohm . .	60

IV	pH Meter/Conductometer

Table of contents

6 Troubleshooting		61
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 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 ............................................................................	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

V

Table of contents
10 Accessories	86
Glossary	88
Index	89

VI	pH Meter/Conductometer

Table of figures

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

pH Meter/Conductometer

VII

1 Introduction

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.

1.1Instrument description

	pH Meter/Conductometer instruments are designed for use both out-
	doors 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 the conductivity, the TDS and
	the salinity.
913 pH Meter	With an analog and a digital measuring channel each for measuring the
	pH value, the potential and the temperature.

914 pH/Conductome- With a digital measuring channel for measuring the pH value, the poten-

ter IS	tial and the temperature and a measuring channel for measuring the con-
	ductivity, the TDS, the salinity and the temperature.

914 pH/Conductome- With an analog measuring channel for measuring the pH value, the poten-

ter	tial and the temperature and a measuring channel for measuring the con-
	ductivity, the TDS, the salinity and the temperature.

pH Meter/Conductometer

1

1.1 Instrument description

1.1.1Model 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
			accessories
2.912.0110		912 Conductometer	Mobile version with acces-
			sories case
2.912.0210		912 Conductometer	Laboratory version with
			instrument base console
2.913.0010		913 pH Meter (digital/analog)	Instrument with standard
			accessories
2.913.0110		913 pH Meter (digital/analog)	Mobile version with acces-
			sories case
2.913.0210		913 pH Meter (digital/analog)	Laboratory version with
			instrument base console
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 acces-
			sories case
2.914.0120		914 pH/Conductometer (pH analog)	Mobile version with acces-
			sories case
2.914.0210		914 pH/Conductometer (pH digital)	Laboratory version with
			instrument base console
2.914.0220		914 pH/Conductometer (pH analog)	Laboratory version with
			instrument base console

NOTE

The accessories for a given instrument version can be created as a PDF list on the Internet at http://partslists.metrohm.com.

1.1.2Power supply

The instrument is powered either by a built-in battery or, in stationary use, via a power supply unit.

2	pH Meter/Conductometer

1 Introduction

1.1.3Interfaces

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.

1.1.4Sensors

Metrohm offers various sensors for specific measurements.

NOTE

For more information on the theoretical background, please refer to the

Metrohm monograph Electrodes in Potentiometry.

1.2Intended 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.

1.3About 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.

1.3.1Symbols 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 sec-
	ond 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

3

1.4 Safety instructions
	File New			Menu or menu item
	[Next]			Button or key
				WARNING
				This symbol draws attention to a possible life-threat-
				ening 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.

1.4Safety instructions

1.4.1General 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.

4	pH Meter/Conductometer

1 Introduction

1.4.2Electrical safety

The electrical safety when working with the instrument is ensured as part of the 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 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.

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.

Do not charge your instrument during thunderstorms.

Do not use the power supply unit outdoors.

pH Meter/Conductometer

5

1.4 Safety instructions

1.4.3Flammable 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 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.

1.4.4Recycling 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.

6	pH Meter/Conductometer

2 Overview of the instrument

2 Overview of the instrument

Figure 1 pH Meter/Conductometer - front

1Connectors / interfaces

With a cover cap for the USB interface and the digital interface.

3Display

For measured values and menus (see Chapter 4.2, page 21).

5Eyelet for carrying strap

As accessory for mobile applications.

2Sensor holder slot

For mobile applications, a sensor holder may be inserted here.

4Keypad

With a total of eight keys to operate the instrument (see Chapter 4.4, page 25).

pH Meter/Conductometer

7

2.1 Instrument connectors

2.1Instrument connectors

2.1.1912 Conductometer

Figure 2 912 Conductometer - connectors

1Conductivity measuring cell

Connection socket for conductivity measuring cells.

2Type B mini USB connector

Connection socket for power supply, data transmission and printing.

2.1.2913 pH Meter

Figure 3 913 pH Meter - connectors

1	pH/mV electrode		2	Temperature sensor / reference
	Connection socket for analog pH/mV elec-
	trodes.
3	pH/mV electrode		4	Type B mini USB connector
	Connection socket for 854 iConnect for			Connection socket for power supply, data
	connecting iTrodes.			transmission and printing.

8	pH Meter/Conductometer

2 Overview of the instrument

2.1.3914 pH/Conductometer IS

Figure 4 914 pH/Conductometer (digital) - connectors

1	Conductivity measuring cell		2	pH/mV electrode
	Connection socket for conductivity measur-			Connection socket for 854 iConnect for
	ing cells.			connecting iTrodes.

3Type B mini USB connector

Connection socket for power supply, data transmission and printing.

2.1.4914 pH/Conductometer

	Figure 5 914 pH/Conductometer (analog) - connectors
1 pH/mV electrode	2 Temperature sensor / reference

Connection socket for analog pH/mV electrodes.

3Conductivity measuring cell

Connection socket for conductivity measuring cells.

4Type B mini USB connector

Connection socket for power supply, data transmission and printing.

pH Meter/Conductometer

9

2.2 Application environment

2.2Application 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.

2.2.1Laboratory 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		2	Clamping ring

3Instrument base console

Consisting of receptacle base and support rod.

10	pH Meter/Conductometer

2 Overview of the instrument

2.2.2Mobile 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 pH Meter/Conductometer for mobile application

1 Electrode holder 2 Eyelet for carrying strap

The holders can be inserted from both sides (left/right) of the instrument.

pH Meter/Conductometer

11

3.1 Unpacking and inspecting the instrument

3 Installation

3.1Unpacking and inspecting the instrument

3.1.1Packaging

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.

3.1.2Checks

Immediately after receipt, check whether the shipment has arrived complete and without damage by comparing it with the delivery note.

3.1.3Scope of application

pH Meter/Conductometer instruments have been designed for mobile application outdoors and/or in the laboratory.

CAUTION

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.

3.2Power 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.

NOTE

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.

12	pH Meter/Conductometer

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).

3.2.1Charging 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.

or

pH Meter/Conductometer

13

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.

Use a USB hub with external power supply or a suitable USB connector 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.

3.2.2Operation 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.

14	pH Meter/Conductometer

3 Installation

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.

3.2.3Operation 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).

3.3Connecting sensors

Sensors can be connected while the instrument is running.

NOTE

Parameter setting

Please note that if you change the sensor the sensor 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.

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

15

3.4 Connecting a printer

3.4Connecting 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.

Figure 8 USB Y cable

1	USB type A		2 USB type B mini
	Power supply unit connector for power sup-		Instrument connector pH Meter/Conduc-
	ply.		tometer.
3	USB type B
	Printer connector.

3.5Initial configuration

3.5.1Setting 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:

German

English

16	pH Meter/Conductometer

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.

3Select the Configuration menu structure with the arrow key and change to the menu structure with the key.

4Select the Language menu dialog with the arrow key and change to the selection dialog with the key.

5Select the required language with the or arrow keys and confirm with the key.

3.5.2Setting 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

17

3.5 Initial configuration

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.

3Select the Configuration menu structure with the arrow key and change to the menu structure with the key.

4Select 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.

18	pH Meter/Conductometer

3 Installation

3.6Installing 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).

1 Go to http://www.metrohm.com/com/Support/Software.html.

2 Select the instrument in the list box.

3Select the appropriate software version and save it somewhere on your computer.

4Extract the zip file. The two files in the SwUpdates subfolder with the suffixes *.bin and *.mbin will be used for the 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.

1 Connect the USB cable to the computer and then to the instrument.

2 Switch on the instrument.

pH Meter/Conductometer

19

3.6 Installing updates

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.

3Copy the two files with the suffixes *.bin and *.mbin directly into the root directory of the instrument (removable drive) using a file manager (e.g. Windows Explorer).

4Switch off the instrument after the copy process has been completed and disconnect it from the USB cable.

5Switch on the instrument again and wait for the installation process.

During start-up, the instrument recognizes the new update files and installs these automatically.

20	pH Meter/Conductometer