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Metrohm 912 Manual

Conductometer, ph meter, ph/do meter, ph/conductometer, ph/do/conductometer
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912/913/914 Meter
Manual
8.912.8001EN / 2020-01-22

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Table of Contents

Troubleshooting

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Do you have a question about the 912 and is the answer not in the manual?

Questions and answers

Vikas Chaudhari
March 6, 2025

User Password creation its shows invalid.

0
1 comments:
Mr. Anderson
March 6, 2025

To resolve an invalid user password creation issue for the Metrohm 912, follow these steps:

1. Ensure the password meets the required format and length.
2. Verify that the correct menu is accessed for user password entry.
3. If switching from Routine to Expert mode, ensure the correct password is entered.
4. Retry entering the password carefully to avoid typing errors.
5. If the issue persists, reset or reconfigure the user settings via the Service/Diagnosis menu (password-protected).
6. If necessary, contact Metrohm support for further assistance.

This answer is automatically generated

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Summary of Contents for Metrohm 912

  • Page 1 912/913/914 Meter Manual 8.912.8001EN / 2020-01-22...
  • Page 3 Metrohm AG CH-9100 Herisau Switzerland Phone +41 71 353 85 85 Fax +41 71 353 89 01 info@metrohm.com www.metrohm.com 912/913/914 Meter Manual 8.912.8001EN / 2020-01-22...
  • Page 4 Technical Communication Metrohm AG CH-9100 Herisau techcom@metrohm.com This documentation is protected by copyright. All rights reserved. This documentation has been prepared with great care. However, errors can never be entirely ruled out. Please send comments regarding possible errors to the address above.

  • Page 5: Table Of Contents

    Flammable solvents and chemicals ........... 5 1.4.4 Recycling and disposal ............. 6 2 Overview of the instrument Instrument connectors ............7 2.1.1 912 Conductometer ..............7 2.1.2 913 pH Meter | 913 pH/DO Meter ........... 8 2.1.3 914 pH/DO/Conductometer ............. 8 2.1.4 914 pH/Conductometer ............
  • Page 6 Editing dialog ................ 33 4.5.6 Selection dialog ..............34 4.5.7 Changing the user ..............35 Menu structures ..............36 4.6.1 912 Conductometer .............. 37 4.6.2 913 pH Meter ................ 38 4.6.3 913 pH/DO Meter ..............39 4.6.4 914 pH/Conductometer ............40 4.6.5...
  • Page 7 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents 5 Operation and maintenance General notes ..............70 5.1.1 Care ..................70 5.1.2 Maintenance by Metrohm Service .......... 70 5.1.3 Sensor care ................70 6 Troubleshooting General ................71 Problems ................72 6.2.1 Troubleshooting ..............72 Restarting/resetting the instrument .........
  • Page 8 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents 9 Accessories Glossary Index ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 9 (digital) - Connectors ........8 Figure 4 914 pH/Conductometer (analog) - connectors ........9 Figure 5 912/913/914 Meter in a laboratory setup ........10 Figure 6 912/913/914 Meter for mobile application ........11 Figure 7 USB Y cable ..................18 Figure 8 View - Main dialog ................

  • Page 11: Introduction

    Metrohm representative or download them from http://www.metrohm.com. Instrument description 912/913/914 Meter instruments are designed for use both outdoors and indoors as well as for stationary use in the laboratory. The measuring instruments are equipped with a permanently installed rechargeable battery for mobile use.

  • Page 12: Instrument Versions And Sales Versions

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1.1 Instrument description 1.1.1 Instrument versions and sales versions 912/913/914 Meter instruments are available in the following versions: Table 1 Instrument versions 2.912.0010 912 Conductometer Instrument with standard accessories 2.912.0110 912 Conductometer Mobile version with accessories case 2.912.0210 912 Conductometer Laboratory version with stand plate 2.913.0010...

  • Page 13: Sensors

    Intended use This instrument is suitable for measuring in chemicals and flammable sam- ples. Therefore, the use of the 912/913/914 Meter requires the user to have basic knowledge and experience in handling toxic and caustic sub- stances. Knowledge regarding the application of fire prevention measures prescribed for laboratories is also mandatory.

  • Page 14: Safety Instructions

    To maintain this state and ensure non-hazardous operation of the instrument, the following instructions must be observed carefully. 1.4.2 Electrical safety Electrical safety when working with the instrument is ensured in compli- ance with international standard IEC 61010. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 15: Flammable Solvents And Chemicals

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction WARNING Only personnel qualified by Metrohm are authorized to carry out service work on electronic components. WARNING Never open the housing of the instrument. The instrument could be damaged. There are no parts inside the housing which can be serviced or replaced by the user.

  • Page 16: Recycling And Disposal

    The correct disposal of your old instrument will help to prevent negative effects on the environment and public health. More details about the disposal of your old instrument can be obtained from your local authorities, from waste disposal companies or from your local dealer. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 17: Overview Of The Instrument

    2 Overview of the instrument 2 Overview of the instrument Instrument connectors 2.1.1 912 Conductometer Figure 1 912 Conductometer - connectors Conductivity measuring cell Type B mini USB connector Connection socket for conductivity measur- Connection socket for energy supply, data ing cells.

  • Page 18: Ph Meter | 913 Ph/Do Meter

    | O Lumitrode Connection socket for conductivity measur- Connection socket for connecting iTrodes ing cells. with 854 iConnect or the O Lumitrode. Type B mini USB connector Connection socket for energy supply, data transmission and printing. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 19: Ph/Conductometer

    The instruments are therefore protected against short- time immersion in water, provided that the respective plugs are plugged in at the sensor connectors. 2.2.1 Laboratory use In the laboratory, 912/913/914 Meter instruments can be placed in a stand plate. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 20: Mobile Application

    Electrode holder Clamping ring Stand plate Consisting of receptacle base and support rod. 2.2.2 Mobile application For mobile application, 912/913/914 Meter instruments can be equipped with a carrying strap and one or two slide-in holders for elec- trodes. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 21: Figure 6 912/913/914 Meter For Mobile Application

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument Figure 6 912/913/914 Meter for mobile application Electrode holder Eyelet for carrying strap The holders can be inserted from both sides (left/right) of the instrument. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 22: Installation

    0 °C. Energy supply The 912/913/914 Meter is equipped with a built-in rechargeable battery which means it can be used for mobile applications. For stationary use in the laboratory, the instrument can be operated with a power supply unit.
  • Page 23 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 26). NOTICE Instrument in battery operation If the instrument is used in battery operation, recharge the instrument as soon as possible. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 24: Charging The Battery

    USB connector of the computer (PC). NOTICE 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. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 25: Operation With Power Supply Unit

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation 3.2.2 Operation with power supply unit You can operate the 912/913/914 Meter with the supplied power sup- ply unit without restrictions. CAUTION Measuring with power supply unit connected Inappropriate power supply units interfere with the measuring signal.

  • Page 26: Connecting Sensors

    CAUTION Cable damage The connection cable can get damaged if it is handled incorrectly. Only remove the connection cable by pulling on the plug. ￭ Do not remove the connection cable by pulling on the cable. ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 27: Connecting A Printer

    Printers for report output are connected with the USB Y cable (6.2151.140). NOTICE Printer function The connected printer will only work if the 912/913/914 Meter is connected to the power grid with the power supply unit. NOTICE Measuring signal interference Inappropriate power supply units of a printer interfere with the measur- ing signal.

  • Page 28: Initial Configuration

    3.6 Initial configuration Figure 7 USB Y cable USB type A USB type B mini Power supply unit connector for energy sup- Instrument connector 912/913/914 ply. Meter. USB type B Printer connector. Initial configuration The steps for switching the instrument on and off are described in the Operation chapter (see chapter 4.1, page 21).

  • Page 29: Setting The Date And Time

    In case of deep discharge of the battery, the system time is reset to the default value. Setting the date and time You can access the menu structures via the Menu item (see figure 13, page 28) in the main screen. Select the entry point with the arrow keys. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 30 Date format: YYYY-MM-DD ￭ Time format: hh:mm:ss ￭ Select the required character with the , and arrow keys and confirm each with the key. Confirm the final value with the editing element and the key. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 31: Operation

    If the instrument is connected to the energy supply, it switches to standby mode. Displays The 912/913/914 Meter has a total of four display types containing spe- cific displays and/or operating functions. Main dialog ￭...

  • Page 32: Figure 8 View - Main Dialog

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4.2 Displays NOTICE Active dialog field The actively selected dialog field is always displayed with the Metrohm green contrast color. In this case, the entry point for the Menu menu structures is selected. Main dialog The main dialog (example: both measuring channels displayed) is the nor- mal status after the instrument has been switched on.

  • Page 33: Figure 9 View - Menu Dialog

    Depending on the data type, a different set of possible characters is avail- able. NOTICE Capital letters and special characters You can insert capital letters and special characters by holding the key. Figure 10 View - Editing dialog ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 34: Figure 11 View - Selection Dialog

    Selection dialogs offer default values for selection in corresponding data fields. Figure 11 View - Selection dialog Standby display The standby display appears during charging if the instrument is turned off. Standby Press to start Figure 12 View - Standby display ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 35: Status Displays

    Routine users. 4.3.3 Sensor quality for pH electrodes The sensor quality is indicated with 3 colored graphical elements. The criteria for the display status are set in the calibration parameters (see chapter 4.7.5, page 48). ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 36: Sensor Status For Do Sensors

    The signal intensity is below the lower limit value. Correct measuring can- not be ensured anymore. Control keys Keypad Switching the instrument on or off. To switch on, briefly push the key. The instrument turns on. ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 37: Basic Operation

    4.5.1 Main dialog with two measuring channels The view with two measuring channels is displayed after the instrument start-up. NOTICE This does not apply for the 912 Conductometer, as this instrument has only one measuring channel. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 38: Figure 13 Operation - Main Dialog, Two-Channel Ph And Conductivity

    (see chapter 4.3.3, page 25). Calibration interval display Display measuring channel 2 Time in days until the next calibration is due. Print/save measured value Date/time display Button for the functions print, save or print+save. Both measured values are printed and/or saved. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 39: Figure 14 Operation - Main Dialog, Two-Channel Ph And Conductivity

    The procedure for functions of the main dialog with two measuring channels is the same as for the main dialog with one measuring chan- nel: (see "Accessing the menu structures", page 31). ￭ (see "Toggling from one-channel to two-channel view", page 31). ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 40: Main Dialog With One Measuring Channel

    (e.g. name, number, etc.). cation (e.g. batch number, lot number, etc.). Users 10 Date/time display Input option for the user name or display of the preset value from the User menu dialog (see chapter 4.7.8, page 57). ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 41: Operation In The Main Dialog

    ￭ - Saving the measured values. ￭ The respective triggering is determined by the settings in the menu: Menu ▶ Measured values ▶ Values ￭ Menu ▶ Measured values ▶ Data ￭ (see chapter 4.7.4, page 46). ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 42: Menu Dialog

    Menu line selected The menu title indicates which menu struc- The selected menu line is always displayed in ture is currently open. the color Metrohm green and in inversed text. Arrow icon The arrow icon indicates that there are fur- ther substructures.

  • Page 43: Editing Dialog

    The cursor moves one space to the left in the data field with the One space to the left editing element. The cursor moves one space to the right in the data field with the One space to the right editing element. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 44: Selection Dialog

    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 key. Select the required data value with the arrow keys. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 45: Changing The User

    3 Switch to the selection dialog Menu ▶ User ▶ Password 4 Enter the Password set on the instrument and confirm with the icon. The instrument's functions are fully accessible and the key icon is no longer displayed in the main menu. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 46: Menu Structures

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4.6 Menu structures Menu structures 912/913/914 Meter 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 37) 913 pH Meter ￭...

  • Page 47: Conductometer

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4 Operation 4.6.1 912 Conductometer Table 2 912 Conductometer – menu structures Menu Parameters Κ/TDS/Sal/ρ/T Measuring parameters ￭ Calibration param. ￭ (see chapter 4.7.2, page 43) Measured values Values ￭ Data ￭ (see chapter 4.7.4, page 46) Criterion ￭...

  • Page 48: Ph Meter

    Date ￭ (see chapter 4.7.7, page 56) Time ￭ Power off after ￭ Turn off LCD after ￭ Brightness ￭ Program version ￭ Language ￭ Service/Diagnosis User User ￭ Dialog type ￭ (see chapter 4.7.8, page 57) ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 49: Ph/Do Meter

    (see chapter 4.7.7, page 56) Date ￭ Time ￭ Power off after ￭ Turn off LCD after ￭ Brightness ￭ Program version ￭ Language ￭ Service/Diagnosis User User ￭ Dialog type ￭ (see chapter 4.7.8, page 57) ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 50: Ph/Conductometer

    Date ￭ (see chapter 4.7.7, page 56) Time ￭ Power off after ￭ Turn off LCD after ￭ Brightness ￭ Program version ￭ Language ￭ Service/Diagnosis User User ￭ Dialog type ￭ (see chapter 4.7.8, page 57) ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 51: Ph/Do/Conductometer

    (see chapter 4.7.7, page 56) Date ￭ Time ￭ Power off after ￭ Turn off LCD after ￭ Brightness ￭ Program version ￭ Language ￭ Change password ￭ Service/Diagnosis ￭ User User ￭ Dialog type ￭ (see chapter 4.7.8, page 57) ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 52: Menu Dialogs

    Menu dialog for the Calibration param.. Temperature Editing dialog for manually entering the calibration temperature. Default value: 25.0 °C / input range: 0.0 - 99.9 °C ￭ Report Selection dialog ￭ off: is the default value ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 53: Parameters Κ/Tds/Sal/Ρ/T

    Default value: 25.0 °C / input range: 0 - 99.9 °C ￭ Editing dialog for entering the temperature compensation value. Temp. compens. Default value: 2.00%/°C / input range: 0.00 - 9.99%/°C ￭ If no temperature compensation is to be applied, enter 0.0%/°C. ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 54: Parameters Do

    Selection dialog for selecting the measuring mode. Measuring mode % air sat ￭ The oxygen saturation in [% air sat] is output. mg/LDO ￭ The mass concentration [mg/L] is output. ppm DO ￭ The ppm by mass is output. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 55 Default value: Auto / input range: –9.9 - +60.0 °C ￭ Air press. comp. Editing dialog for automatically or manually selecting and entering the atmos- pheric pressure compensation. Default value: Auto / input range: 300 - 1,200 mbar ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 56: Measured Values

    Selection dialog to indicate whether the Data are to be printed and/or saved. print: ￭ save: ￭ print+save: ￭ Criterion Selection dialog to indicate when the Measured values are applied during the measurement. immediately ￭ The displayed measured value will be immediately applied. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 57 Selection dialog for selecting the measuring channel that has to fulfill the change criterion. – Delta DO Default value: 0.5 mg/L / input range: 0.1 - 99 mg/L – Delta % air sat Default value: 10% / input range: 1 - 500% ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 58: Sensors

    Selection dialog for selecting whether the main Calibration data is assigned for the output of the measured values. ￭ off: is the default value ￭ 4.7.5 Sensors The Sensors menu dialog is shown below with the structure and the description. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 59 An available sensor can be selected in Sensors. The individual menu lines are then also available corresponding to the selected sensor. Selection Selection dialog for selecting an identified sensor for editing and displaying the individual data. k default ￭ metal def. ￭ pH default ￭ temp default ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 60 Display field indicating the temperature in °C from the last calibration. temp. Display field indicating the reference temperature in °C. Reference temp. Display field indicating the value for temperature compensation of the last cali- Temp. compens. bration. Default value: 2.07%/°C / input range: 0.00 - 9.99%/°C ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 61 Selection dialog for selecting whether the limit value is to be applied. Slope limit value on: is the default value ￭ ￭ Editing dialog for entering the lower limit value. Slope lower limit Default value: 95.0 / input range: 1.0 - 999.9% ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 62 Selection dialog for selecting whether the limit value is to be applied. 100 % on: is the default value ￭ ￭ Editing dialog for the lower limit. lower limit Default value: 15 ° / input range: 15.0 - 30.0 ° ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 63 Editing dialog for entering time in days for the Calibration interval. Calibration inter- Default value: off / input range: 1 - 999 d ￭ off disables the Calibration interval. ￭ Temp. sensor Selection dialog to indicate the temperature sensor type for the respective sen- sor. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 64 Default value: 0.400 /cm / input range: 0.001 - 500 /cm ￭ Editing dialog for entering the upper limit value. c upper limit Default value: 0.550 /cm / input range: 0.001 - 500 /cm ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 65: Report

    The Report menu dialog is shown below with the structure and the description. NOTICE Printer 912/913/914 Meter instruments support various printer types for report output. If your printer is not listed, please use the printer Universal (ESC-POS), which has appropriate setting parameters. Report Selection dialog for data output in the Report.

  • Page 66: Configuration

    The display turns off after this time and can be turned back on again with any key other than the key. Default value: 15 / input range: 1 - 60, or ￭ auto for dimming after 20 seconds and switching off the display after ￭ another 60 seconds. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 67: User

    The default setting ex works is Expert. Old password New password Confirm Service/Diagnosis ▶ Menu dialog with password-protected access for Metrohm Service. Password Password entry for the Service/Diagnosis menu functions. 4.7.8 User The User menu dialog for setting user restrictions and user data is shown below with the description.

  • Page 68: Ph Measurement

    By default, the calibration parameters are set for calibration with two Metrohm buffer solutions (see chapter 4.7.1, page 42). If you would like to use other buffers, you have to select the corresponding buffer type and the number of buffer solutions.
  • Page 69 ￭ NOTICE 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.

  • Page 70: Measurement

    3 Carrying out the measurement Rinse the sensor with water and immerse it in the sample. ￭ Select the Print/save measured value button with the ￭ keys. Trigger printing and/or saving of the measured value with the ￭ key. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 71: Conductivity Measurement

    The calibration parameters are set to default values (see chapter 4.7.2, page 43). If the Report selection dialog is set to on in the Calibration param. menu dialog, then the calibration data will be output immediately. 1 Starting the calibration ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 72: Measurement

    4.9.2 Measurement NOTICE Measured value criteria You can set the various criteria for defining the measured value determi- nation as follows (see chapter 4.7.4, page 46): 1 Selecting the printout criterion ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 73 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 stor- age instructions for the sensor. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 74: Oxygen Measurement

    Remove the sensor from the calibration vessel. ￭ Immerse the sensor up to over the metal ring in 0% oxygen stan- ￭ dard and swirl to remove adhering air bubbles. Press the key to continue the calibration. ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 75: Measurement

    3 Carrying out the measurement Rinse the sensor with water and immerse it in the sample. ￭ Select the Print/save measured value button with the ￭ keys. Trigger printing and/or saving of the measured value with the ￭ key. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 76: Issuing Reports/Measured Values

    After the last measurement, rinse the sensor and follow the stor- age instructions for the sensor. 4.11 Issuing reports/measured values The 912/913/914 Meter supports the output of various printouts and data transfers for displaying the calibration and measured values. 4.11.1 Printing out...

  • Page 77: Pc/Lims And Csv 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. NOTICE DO sensor The measured values of the DO sensor are not output in the PC/LIMS format.
  • Page 78 PC/LIMS or save as CSV under Menu ▶ Measured values ▶ Values. 2 Connecting the instrument to the PC Connect the instrument to the PC using the supplied USB cable (6.2151.110). The instrument is automatically recognized as a removable drive. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 79 3 Transferring report data The generated files are stored on the instrument as follows and can be transferred to the computer for evaluation and report generation: PCLIMS_X.UTF8 is in the PCLIMS directory ￭ MEASREPORT.CSV is in the CSV directory ￭ ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 80: Operation And Maintenance

    5.1.2 Maintenance by Metrohm Service Maintenance of the 912/913/914 Meter is best carried out as part of annual service, which is performed by specialist personnel from Metrohm. A shorter maintenance interval may be necessary if you frequently work with caustic and corrosive chemicals.

  • Page 81: Troubleshooting

    The sensors are the most important component in the entire measuring system. For the correct handling of sensors, please read the corresponding leaflets. If the 912/913/914 Meter might be the cause of a measuring problem, Instrument check all configuration and parameter settings first.

  • Page 82: Problems

    The measuring input Send the measuring instrument to the ￭ and/or the measuring Metrohm Service for inspection and, if nec- channel is defective. essary, repair. The instrument does The instrument battery is Connect the instrument to the power sup- ￭...
  • Page 83 Measurement takes place Use a suitable sensor. ￭ in an organic solution. Non-Metrohm power sup- Use only the supplied power supply unit ￭ ply unit used for charging during measurement operation. the battery. cap is worn out.

  • Page 84: Restarting/Resetting The Instrument

    6.3.2 Resetting the instrument to factory settings This function deletes all user data on the instrument. Afterwards, the instrument will be in the state as delivered from the manufacturer with the default settings. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 85: Messages

    Example of a message Message number and message Symbol Message text Remedy NOTICE Message number Each message contains a message number in the top left-hand corner. Please indicate this number in the case of queries or complaints. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 86: Appendix

    Saved buffer series The temperature-dependent pH values of the most important commer- cially available pH buffer solutions are stored in 912/913/914 Meter instruments for automatic buffer recognition during pH calibration. In addition to the Metrohm buffer solutions, other reference buffers are also included in the tables.

  • Page 87: Metrohm

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 7 Appendix 7.1.1 Metrohm Table 7 Metrohm buffer solutions Metrohm Temp. (°C) 4.00 7.00 9.00 3.99 7.11 9.27 3.99 7.08 9.18 3.99 7.06 9.13 3.99 7.04 9.08 3.99 7.02 9.04 4.00 7.00 9.00 4.00 6.99 8.96 4.01 6.98 8.93 4.02...

  • Page 88: Nist (According To Din Standard 19266, 2015)

    The values of the individual buffers with the corresponding tempera- tures are kept as up to date as possible. However, they may be changed by the respective manufacturers. The NIST buffers are identical to the buffer solutions that are used in Chinese pharmacopoeia. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 89: Din (According To Din Standard 19267, 2012)

    11.08 1.13 3.07 4.79 6.80 8.82 10.99 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept as up to date as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 90: Fisher

    4.21 7.08 9.60 4.23 7.11 9.60 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept up to date as far as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 91: Mettler Toledo

    4.30 7.09 8.79 4.35 7.12 8.77 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept up to date as far as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 92: Merck Certipur 20 / Titrisol

    The values of the individual buffers with the corresponding tempera- tures are kept as up to date as possible. However, they may be changed by the respective manufacturers. The CertiPUR 20 and Titrisol product lines have the identical values. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 93: Merck Certipur 25

    6.97 8.86 9.80 3.98 6.97 8.84 9.73 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept as up to date as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 94: Beckmann

    4.18 7.01 4.19 7.02 4.21 7.03 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept up to date as far as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 95: Radiometer Analytical

    7.018 8.867 1.792 4.210 7.034 8.850 4.240 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept as up to date as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 96: Baker

    8.64 9.66 4.21 7.00 8.62 9.64 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept up to date as far as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 97: Hamilton Duracal

    9.03 9.83 4.06 6.97 8.99 9.79 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept up to date as far as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 98: Fluka

    8.655 4.000 7.000 8.640 4.000 7.010 8.620 NOTICE Update The values of the individual buffers with the corresponding tempera- tures are kept as up to date as possible. However, they may be changed by the respective manufacturers. ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 99: Technical Specifications

    –1200.0 mV - +1200.0 mV 0.1 mV ±0.2 mV Conductance 0.1 µS - 500 mS 4 significant digits ±0.5% at 0.1 µS - 16 µS ±0.5% at 16 µS - 1 mS ±1.0% at 1 mS - 500 mS ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 100: Measured Value Memory

    3.5 inches (70.08 x 52.56 mm) Interfaces USB connector Type A/B mini USB connector (USB 2.0) with the following functions: Energy supply ￭ Data transmission ￭ with USB cable (6.2151.110) Printing ￭ with USB Y cable (6.2151.140) ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 101: Energy Supply

    Charging time Charging time 9 hours with original power supply unit (no. 6.2166.100) and original with power supply USB cable unit Charging time on 15 hours USB interface Charging time 15 hours with USB Y cable ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 102: Runtime With Rechargeable Battery

    Storage and trans- 0°C - +45°C (at a max. of 85% humidity) port Reference conditions Ambient tempera- +25 °C (±3 °C) ture Relative humidity ≤ 60% Instrument status > 5 min. in operation After adjustment Validity of the data ￭￭￭￭￭￭￭￭ 912/913/914 Meter...

  • Page 103: Dimensions/Material

    8.10 Dimensions/material Dimensions Length 208 mm Width 92 mm Height 34 mm Weight 400 g (net incl. battery) Material Housing Acrylonitrile butadiene styrene (ABS) Keyboard foil Polyester (PES) Screen cover Polycarbonate (PC) Interface cover Thermoplastic elastomers (TPE-E) ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 104 1 Enter https://www.metrohm.com/ into your Internet browser. 2 Enter the article number (e.g. 912 | 913 | 914) into the search field. The search result is displayed. 3 Click on the product. Detailed information regarding the product is shown on various tabs.
  • Page 105 (see "Selection dialog", page 24). Difference between nominal value of the buffer (by interpolating between two values from the buffer table) and the pH value that results from the measured voltage from the calibration lines (see chapter 4.11, page 66). ￭￭￭￭￭￭￭￭ 912/913/914 Meter...
  • Page 106 Resistance value ....... 43 Control keys ......26 Measured values ....... 46 CSV file ........68 Measuring parameters .. 42, 43, 44 Metrohm Service ...... 70 Safety instructions ...... 4 Sales version ....... 2 Date ......... 56 Salinity ........43 Display ........

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