pH Meter/Conductometer 912 Conductometer | 913 pH Meter | 914 pH/Conductometer Manual 8.912.
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.
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.
■■■■■■■■■■■■■■■■■■■■■■ 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 ...........................................
■■■■■■■■■■■■■■■■■■■■■■ 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 ......................................................................
■■■■■■■■■■■■■■■■■■■■■■ Table of contents 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 .............................................................
■■■■■■■■■■■■■■■■■■■■■■ Table of contents VI ■■■■■■■■ 10 Accessories 86 Glossary 88 Index 89 pH Meter/Conductometer
■■■■■■■■■■■■■■■■■■■■■■ 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 .......................................................
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 accessories 2.912.0110 912 Conductometer Mobile version with accessories 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 1.4.2 1 Introduction Electrical 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.
■■■■■■■■■■■■■■■■■■■■■■ 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. ■ ■ ■ ■ 1.4.4 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 21). 4 Keypad With a total of eight keys to operate the instrument (see Chapter 4.4, page 25).
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 2.1.3 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 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 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 battery, use a car charger adapter from the Metrohm accessories (6.2166.500).
■■■■■■■■■■■■■■■■■■■■■■ 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. 3.2.3 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.
■■■■■■■■■■■■■■■■■■■■■■ 3.4 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. 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 2 3 4 Select the entry point with the Use the or key to change to the menu structures. Select the Configuration menu structure with the key. Select the Language menu dialog with the arrow key and Select the required language with the keys and confirm with the 3.5.
■■■■■■■■■■■■■■■■■■■■■■ 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 2 3 Select the entry point with the Use the or arrow keys. key to change to the menu structures. Select the Configuration menu structure with the arrow key and change to the menu structure with the 4 key. Select the Date or the Time menu dialog with the key and change to the editing dialog with the ■ ■ arrow key.
■■■■■■■■■■■■■■■■■■■■■■ 3.6 3 Installation 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). 1 Go to http://www.metrohm.com/com/Support/Software.html.
■■■■■■■■■■■■■■■■■■■■■■ 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. 3 Copy 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). 4 Switch off the instrument after the copy process has been completed and disconnect it from the USB cable.
■■■■■■■■■■■■■■■■■■■■■■ 4 Operation 4 Operation 4.1 Switching the instrument on and off Switching on the instrument Proceed as follows to do this: 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 message 912-129 Shut down appears and the instrument saves the data and turns off. 4.
■■■■■■■■■■■■■■■■■■■■■■ 4.2 Displays 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 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.
■■■■■■■■■■■■■■■■■■■■■■ 4 Operation NOTE Capital letters and special characters You can insert capital letters and special characters by holding the key. Figure 11 Selection dialog Selection dialogs offer preset values for selection in corresponding data fields.
■■■■■■■■■■■■■■■■■■■■■■ 4.3 Status displays 4.3 Status displays The main dialog displays contain corresponding graphical elements to show instrument and sensor statuses. 4.3.1 Battery status The battery status is displayed in five stages with colored graphical elements. The battery is full and charging is complete. The battery is nearly full but still charging. The battery is charged to 75%. The battery is charged to 50%. The battery is charged to 25%. The battery is empty.
■■■■■■■■■■■■■■■■■■■■■■ 4.3.3 4 Operation 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.5 Basic operation NOTE Calibration A sensor can only be calibrated in the corresponding one-channel main dialog. The BACK key causes the entry to be accepted and/or the dialog to be exited. The OK key confirms a selection or starts a process. The LEFT/RIGHT arrow keys are used for navigation in the text and number editor for selecting characters or for toggling between the measuring channel displays in the main dialog.
■■■■■■■■■■■■■■■■■■■■■■ 4 Operation Figure 13 Operation - main dialog, two-channel 1 Battery state of charge (see Chapter 4.3.1, page 24). 2 Menu access (see "Accessing the menu structures", page 28). 3 Sensor condition (see Chapter 4.3.3, page 25). 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.5 Basic operation Figure 14 Operation - main dialog, one-channel 1 Battery state of charge (see Chapter 4.3.1, page 24). 2 Menu access (see "Accessing the menu structures", page 28). 3 Sensor condition (see Chapter 4.3.3, page 25). 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.
■■■■■■■■■■■■■■■■■■■■■■ 4 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.5 Basic 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.
■■■■■■■■■■■■■■■■■■■■■■ 4 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.5 Basic operation 4.5.6 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 32 ■■■■■■■■ key. Select the required data value with the keys.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.6 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.7 Menu dialogs Temperature Editing dialog for the manual entry of the calibration temperature. ■ Reference temp. Editing dialog for the entry of the reference temperature of the calibration standard. ■ Stand. conduct. Default value: 2.07%/°C / input range: 0.00 - 9.99%/°C Selection dialog ■ ■ 4.7.3 Default value: 12.800 mS/cm / input range: 0.0000 - 2,000.0 mS/cm Editing dialog for the entry of the temperature compensation. ■ Report Default value: 25.
■■■■■■■■■■■■■■■■■■■■■■ Criterion 4 Operation ■ print: ■ save: ■ print+save: Selection dialog to indicate when the Measured values are applied during the measurement. ■ ■ ■ pH Meter/Conductometer 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 up to 16 µS/cm – 0.
■■■■■■■■■■■■■■■■■■■■■■ 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 [pH] icon. Menu lines that are available only for conductivity are marked with the [ K ] icon.
■■■■■■■■■■■■■■■■■■■■■■ 4.7 Menu dialogs Only displayed for iTrodes. Serial number Editing dialog for the entry/modification of the Serial number. Only displayed for iTrodes. pH Slope Editing dialog for the entry/modification of the Slope. ■ pH pH(0) Editing dialog for the entry/modification of 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 the entry/modification of the Cell constant.
■■■■■■■■■■■■■■■■■■■■■■ 4 Operation ■ ■ pH Slope lower limit Editing dialog for the entry of 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 setting Editing dialog for the entry of the lower limit value. Default value: 0.400 /cm / input range: 0.001 - 500 /cm Editing dialog for the entry of the upper limit value. ■ New sensor ▶ Default value: 8.00 / input range: 0.00 - 99.
■■■■■■■■■■■■■■■■■■■■■■ 4.7 Menu dialogs ■ Default value: 100.00 / input range: 0.10 - 999.99% pH pH(0) Editing dialog for the entry/modification of pH(0). K Editing dialog for the entry/modification of the Cell constant. Cell constant ■ Calibration interval Editing dialog for the entry of time in days for the Calibration interval. ■ ■ Temp.
■■■■■■■■■■■■■■■■■■■■■■ 4 Operation ■ K c lower limit Editing dialog for the entry of the lower limit value. ■ K c upper limit Default value: 0.400 /cm / input range: 0.001 - 500 /cm Editing dialog for the entry of the upper limit value. ■ Delete sensor off: is the default setting 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 Deutsch 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 28).
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 28). 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.10 Outputting reports/measured values 4.10 Outputting reports/measured values The pH Meter/Conductometer supports the 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.
■■■■■■■■■■■■■■■■■■■■■■ 4 Operation NOTE Data output For a data output, save or print+save has to be set for the recording of measured values so that this data is saved on the instrument. Data generation The measured value data has to be re-generated before any 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.
■■■■■■■■■■■■■■■■■■■■■■ 4.10 Outputting reports/measured 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 on the instrument as follows and can be transferred to the PC for evaluation and report generation: ■ ■ 58 ■■■■■■■■ PCLIMS_X.UTF8 is in the directory PCLIMS MEASREPORT.
■■■■■■■■■■■■■■■■■■■■■■ 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.
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.
■■■■■■■■■■■■■■■■■■■■■■ 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.).
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ ■ ■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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) 1.000 4.000 7.000 9.000 13.000 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.
■■■■■■■■■■■■■■■■■■■■■■ 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) 1.00 3.00 4.00 7.00 9.00 12.00 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 7.1.5 7 Appendix Mettler Toledo Table 10 Mettler Toledo buffer solutions Mettler Toledo Temp. pH pH pH pH pH (°C) 2.00 4.00 7.00 9.00 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 7.1 Saved buffer series 7.1.8 Beckmann Table 13 Beckmann buffer solutions Beckmann Temp. pH pH pH (°C) 4.00 7.00 10.00 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.
■■■■■■■■■■■■■■■■■■■■■■ 7.1.9 7 Appendix Radiometer Table 14 Radiometer buffer solutions Radiometer Temp. pH pH pH (°C) 4.010 7.000 9.180 0 4.000 7.118 9.464 5 3.998 7.087 9.395 10 3.997 7.059 9.332 15 3.998 7.036 9.276 20 4.001 7.016 9.225 25 4.005 7.000 9.180 30 4.011 6.987 9.139 35 4.018 6.977 9.102 40 4.027 6.970 9.068 45 4.038 6.965 9.038 50 4.050 6.964 9.011 55 4.064 6.965 8.985 60 4.080 6.968 8.962 65 4.097 6.974 8.941 70 4.116 6.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 Device Measuring inputs / measuring modes Electrode, analog Electrode, digital Conductivity Reference T x T x Κ/TDS/Sal/ρ/T 2.912.010 2.913.010 pH/U/T 2.914.
■■■■■■■■■■■■■■■■■■■■■■ 8.2 Measured value memory 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 millions Display size 3.5 inches (70.08 x 52.56 mm) 8.4 Interfaces USB connector 8.5 Type A/B mini USB connector (USB 2.0) with the following functions: ■ Power supply ■ Data transmission with USB cable (6.2151.110) ■ Printing with USB Y cable (6.2151.
■■■■■■■■■■■■■■■■■■■■■■ 8 Technical specifications USB connector Nominal input voltage 4.75 - 5.25 V DC Power consumption 850 mA max. Power consumption at PCUSB 500 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.
■■■■■■■■■■■■■■■■■■■■■■ 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 in accordance with the EU directives: 2006/95/EC (Low Voltage Directive, LVD) ■ 2004/108/EC (EMC Directive, EMC) ■ Design and testing According to EN/IEC/UL 61010-1, CSA-C22.2 No.
■■■■■■■■■■■■■■■■■■■■■■ 8.11 8 Technical specifications Ambient temperature Operation –10 °C - +40 °C (at a max. of 85% humidity) Storage –10 °C - +40 °C (at a max. of 85% humidity) Transport –10 °C - +45 °C 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.
■■■■■■■■■■■■■■■■■■■■■■ 9 Warranty (guarantee) Metrohm guarantees that the deliveries and services it provides are free of defects in materials, design or manufacturing. The general warranty period is 36 months (exclusions below) from the date of delivery, or 18 months in the event of continuous operation. The warranty remains valid on the condition that the servicing is provided by a service organization authorized by Metrohm at defined intervals and with a defined scope.
■■■■■■■■■■■■■■■■■■■■■■ 9 Warranty (guarantee) The same warranty periods that are specified for a corresponding new part apply to parts that are replaced or repaired within the above-mentioned warranty periods. However, replacement or repair of a part does not extend the warranty period of the entire system. Deficiencies arising from circumstances that are not the responsibility of Metrohm, such as improper storage or improper use, etc., are expressly excluded from the warranty.
■■■■■■■■■■■■■■■■■■■■■■ 10 Accessories Up-to-date information on the scope of delivery and optional accessories for your instrument can be found on the Internet. 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.
■■■■■■■■■■■■■■■■■■■■■■ 10 Accessories The Partslists webpage will be displayed. 7 Select the desired output language. 8 With the article number entered, click on the command Generate PDF. The PDF file with the accessories data will be created in the language selected. Direct access for all instruments If you are unable to find your instrument using the search as described above, this may be due to the instrument not being sold anymore.
■■■■■■■■■■■■■■■■■■■■■■ 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 22). 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.
■■■■■■■■■■■■■■■■■■■■■■ Index Index B Battery ..................................... 12 Brightness ................................ 49 C Calibration .......................... 50, 53 Calibration param. .............. 38, 39 Change password ..................... 49 Conductivity ................... 1, 39, 53 Conductometer .......................... 8 Configuration ........................... 48 Connector .................................. 8 Control keys ............................. 25 CSV file ..............