Metrohm 949 Manual
  1. Manuals
  2. Brands
  3. Metrohm Manuals
  4. Measuring Instruments
  5. 949
  6. Manual

Metrohm 949 Manual

Ph meter
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
949 pH Meter
Manual
8.0949.8101EN / v2 / 2024-05-07

Advertisement

Table of Contents

Troubleshooting

loading
Need help?

Need help?

Do you have a question about the 949 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Metrohm 949

Summary of Contents for Metrohm 949

  • Page 1 949 pH Meter Manual 8.0949.8101EN / v2 / 2024-05-07...
  • Page 3 Metrohm AG CH-9100 Herisau Switzerland +41 71 353 85 85 info@metrohm.com www.metrohm.com 949 pH Meter Manual 8.0949.8101EN / v2 / 2024-05-07...
  • Page 4 Disclaimer 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. Unauthorized modifications to the product (e.g., conversions or attachments) exclude any liability on the part of the manufacturer for resulting damage and its consequences.

  • Page 5: Table Of Contents

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents Table of contents 1 Introduction Product description .............. 1 Product versions ..............1 Symbols and conventions ............ 2 Displaying accessories ............3 2 Safety Intended use ................. 5 Responsibility of the operator ..........5 Requirements for operating personnel ....... 6 Safety instructions ..............
  • Page 6 Printing data ................40 5.7.6 Retrieving the memory ............41 Device settings ..............41 6 Maintenance Care ..................44 Maintenance by the regional Metrohm service repre- sentative ................44 Cleaning ................45 7 Troubleshooting General ................46 Problems ................47 7.2.1...
  • Page 7 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures Table of figures Figure 1 949 pH Meter – Connectors .............. 8 Figure 2 949 pH Meter – Indicators and controls ..........9 Figure 3 Display screen ................. 10 ￭￭￭￭￭￭￭￭...

  • Page 9: Introduction

    1 Introduction 1 Introduction Product description The 949 pH Meter is designed for stationary use in laboratories. The device is ideally suited for fast and reliable pH measurements in the labora- tory, and offers additional functions, such as mV measurement, ORP measurement, or temperature measurement.

  • Page 10: Symbols And Conventions

    1.3 Symbols and conventions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Metrohm article number Barcode Serial number Symbols and conventions The following symbols and formatting may appear in this documentation: Cross-reference to figure legend The first number refers to the figure number, the second to the instrument part in the figure.

  • Page 11: Displaying Accessories

    This symbol highlights additional information and tips. Displaying accessories Up-to-date information on the scope of delivery and on optional accesso- ries can be found on the Metrohm website. 1 Searching for a product on the website Go to https://www.metrohm.com. ￭...
  • Page 12 1.4 Displaying accessories ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ NOTE Metrohm recommends keeping the accessories list for reference purposes. ￭￭￭￭￭￭￭￭...

  • Page 13: Safety

    Intended use This device is suitable for making measurements in chemicals and flamma- ble samples. Therefore, the use of the 949 pH Meter requires the user to have basic knowledge and experience in handling toxic and caustic sub- stances. Knowledge of the application of the fire prevention measures prescribed for laboratories is also mandatory.

  • Page 14: Requirements For Operating Personnel

    2.4.2 Electrical safety The electrical safety when working with the device 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. ￭￭￭￭￭￭￭￭...

  • Page 15: Flammable Solvents And Chemicals

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Safety 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. 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 and result in the revocation of the guarantee or warranty.

  • Page 16: Overview Of The Device

    3.1 Connectors ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Overview of the device Connectors Figure 1 949 pH Meter – Connectors Temp connection socket pH/mV connection socket Pt1000 temperature sensor connector Connector for pH electrodes and Redox electrodes Information symbol Printer connection socket RS-232 connector for a printer or computer Power socket 5 V DC ￭￭￭￭￭￭￭￭...

  • Page 17: Indicators And Controls

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Overview of the device Indicators and controls 3.2.1 Overview Figure 2 949 pH Meter – Indicators and controls Display LED status display Up direction button Mode button Direction button for scrolling through sub- Selection between the measurement menus and between saved values, to...

  • Page 18: Display

    3.2 Indicators and controls ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table 2 Button icons Icon Button On/Off button Up direction button Cancel button and Calibration button Enter button and Menu button Mode button Down direction button 3.2.2 Display Figure 3 Display screen Measuring parameters Error symbol Date and time display Measuring unit ￭￭￭￭￭￭￭￭...

  • Page 19: Led Status Display

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Overview of the device Measured value Temperature and type of compensation Number of values stored Information symbols Electrode calibration range 10 Lower text field 11 Stability indicator 12 Operation mode 13 Upper text field Table 3 Symbols on the display Symbol Meaning The values are automatically collected.
  • Page 20 3.2 Indicators and controls ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Function LED color Description Standby Flashes every 20 s Stable measurement Flashes every 3 s Calibration error Flashes every 1 s Measurement error Flashes every 3 s Time for saving values On and off in quick succession Opening saving mode GREEN and RED alternating, pause 5 s...

  • Page 21: Installation

    If the delivery is incomplete or damaged, contact your regional ￭ Metrohm representative. 4.1.3 Application area The 949 pH Meter has been developed for use in a laboratory. CAUTION Influence of weather conditions Damage to devices as a result of direct sunlight or temperatures below freezing.

  • Page 22: Plugging In The Power Cord

    Unplug the power plug immediately if you suspect that moisture has ￭ gotten inside the instrument. Only personnel who have been issued Metrohm qualifications may ￭ perform service and repair work on electrical and electronic parts. CAUTION Use only the original power cord.

  • Page 23: Connecting A Printer

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4 Installation Connecting a printer Plug the TX-900MH impact printer for report output into the Printer connection socket using an RS-232 cable. NOTE Use only the TX-900MH impact printer. Contact your regional Metrohm representative for additional informa- tion. ￭￭￭￭￭￭￭￭...

  • Page 24: Operation

    5.1 Switching the device on and off ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Operation Switching the device on and off Switching on the device Press the button. The device switches to measuring mode with the last parameter used. NOTE During the start-up phase during its first use, the device will request the updating of the date and time (see chapter 5.8, page 41).
  • Page 25 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Operation Measuring parameters Functions Display of potential in mV ￭ Measurement of potential in mV ￭ Retrieve memory ￭ Measurement of oxidation reduction poten- ￭ tial in mV Calibration ￭ Retrieve memory ￭ Changing the measuring parameters Press the button to switch between the different measuring parameters.

  • Page 26: Temperature Measurement

    5.3 Temperature measurement ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Operation mode Meaning The device is in set-up mode. The configuration menus can relate to the properties of the parameters, the data processing settings or the device settings. The device is in retrieve memory mode. The saved values of the respective parameter are displayed.

  • Page 27: Settings

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Operation Set the value with the buttons. Confirm the setting with the button. Settings Press the button in measuring mode to access the settings. Use the buttons to select the parameter to be edited. Confirm the selection with the button.

  • Page 28: Ph Parameters

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ pH parameters 5.5.1 Sensors The 949 pH Meter can be used with combined pH sensors with or without an integrated temperature sensor. Connecting the sensor 1 Plug the pH electrode into the pH/mV connection socket. 2 Plug the temperature sensor into the Temp connection socket.
  • Page 29 ￭ the points calibrated up to that point. The 949 pH Meter automatically detects (see chapter 5.5.3, page 24) 3 buffer families (METROHM, USA, NIST). A manual calibration (see chapter 5.5.4, page 27) (CUSTOM) with up to 2 calibration points can also be carried out with user-defined values.
  • Page 30 ￭ points) NOTE The 949 pH Meter accepts only calibrations with pH electrodes with a slope in an acceptance range between 80% and 120%. Calibration can- not be exits outside the acceptance range. The SLOPE OUT OF RANGE error message appears on the display.
  • Page 31 As soon as a calibration time has been set, the symbol will appear on the display in measuring mode. As soon as the set calibration time is reached, the 949 pH Meter pre- vents further measurements and the symbols flash on the display.

  • Page 32: Automatic Calibration

    5.5 pH parameters ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ P1.9 pH temperature offset All devices of the 949 pH Meter type are precalibrated for a correct temp- erature measurement. If the temperature sensor malfunctions, there may be a difference between the measured temperature and the actual temp- erature.
  • Page 33 949 pH Meter is calibrated in the neutral range. The 949 pH Meter is ready to detect the 2nd calibration point. Next to the 2ND POINT PH message, all buffers that the 949 pH Meter can automatically detect will appear in turn. NOTE The CHANGE BUFFER message prompts the user to change the buffer solution.
  • Page 34 2nd slope. symbol will appear next to the symbols. The symbol means that the 949 pH Meter is calibrated in the alkaline range. After completing the 3rd calibration point, the 949 pH Meter automat- ically returns to measuring mode.

  • Page 35: Manual Calibration

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Operation CAUTION Before proceeding with the calibration procedures of the sensors, care- fully read the safety data sheets for the following substances used: Buffer solutions ￭ Storage solution for pH electrodes ￭ Electrolyte for pH electrodes ￭ 5.5.4 Manual calibration Manual calibration is depicted using 2-point calibration pH 6.79 and pH 4.65 (DIN19267) as an example.
  • Page 36 5.5 pH parameters ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ The WAIT FOR STABILITY message appears on the display and the symbol flashes. As soon as the symbol appears and the pH value flashes, enter the correct value with the buttons (e.g. 6.79). NOTE The ADJUST VALUE message prompts the user to adjust the ￭...

  • Page 37: Ph Measurement

    2nd buffer. After completing the 2rd calibration point, the 949 pH Meter automat- ically returns to measuring mode. For a 1-point calibration, press the button after completing the 1st ￭...
  • Page 38 5.5 pH parameters ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ NOTE If no electrode with an integrated temperature sensor or with an external Pt1000 temperature sensor is used, Metrohm recom- mends manually updating the temperature value (see chapter 5.3, page 18). 3 Remove the vessel from the electrode.

  • Page 39: Orp Parameters

    ORP parameters 5.6.1 Sensors ORP sensors can be used with the 949 pH Meter to measure the oxide reduction potential. Plugging in sensors 1 Plug the Redox electrode into the pH/mV connection socket.
  • Page 40 5.6 ORP parameters ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Setting Meaning Selection Default value P2.6 ORP calibration data VIEW | PRINT CALIBRATION DATA P2.7 ORP calibration time NO | HOURS | DAYS SET DUE CAL P2.8 Resetting ORP settings YES | NO RESET SETTINGS P2.9 ORP temperature off- YES | NO TEMPERATURE CAL...
  • Page 41 As soon as a calibration time has been set, the symbol will appear on the display in measuring mode. As soon as the set calibration time is reached, the 949 pH Meter pre- vents further measurements and the symbols flash on the display.

  • Page 42: Automatic Calibration

    Redox solution 250 mV / 25 °C. Contact your regional Metrohm representative to purchase the Redox solution 250 mV / 25 °C. The 949 pH Meter can correct the sensor by ±75 mV with an offset align- ment. Automatic calibration with the 250 mV Redox solution...

  • Page 43: Data Processing

    ￭ Data processing 5.7.1 General The 949 pH Meter can save data in the GLP format in the internal device memory. The 949 pH Meter can save up to 1,000 data points. No values are ￭ overwritten when the memory is full. The number of saved values for the respective parameter appears in measurement mode next to the symbol.

  • Page 44: Data Processing Settings

    5.7 Data processing ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ NOTE Use only the TX-900MH impact printer. Contact your regional Metrohm representative for additional informa- tion. The TX-900MH impact printer includes a USB connecting cable, a Y cable, and an RS-232 cable to connect it to the device.
  • Page 45 ￭ P8.3 Outputting data P8.3 is used to decide where the recorded data is output. MEMORY: The 949 pH Meter saves the collected data in the internal ￭ device memory. The total number of the currently saved values appears next to the symbol.

  • Page 46: Automatic Data Collection

    5.7 Data processing ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Default value: SIMPLE NOTE The data is printed out in the following cases: As soon as a printout of certain data for a certain parameter is ￭ started for the first time. As soon as a new calibration is performed. ￭...

  • Page 47: Manual Data Collection

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Operation symbol flashes on the display. The flashing symbol ￭ shows that saving is in progress. 5 Exiting the data collection Press the button to exit the data collection. NOTE If automatic data collection is set, but not in operation, then the symbol will remain on the display.

  • Page 48: Printing Data

    5.7 Data processing ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Saving data manually Press the button as soon as a value needs to be saved. 5.7.5 Printing data Example: Printing out the pH value and calibration data manually. 1 Opening the settings Use the button to change to the range.

  • Page 49: Retrieving The Memory

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Operation NOTE The values saved in the internal device memory cannot be printed out. 5.7.6 Retrieving the memory In measuring mode, press the button for the required parameter to switch to retrieve memory mode. The most recently saved values appear on the display. Go through the saved values with the buttons.
  • Page 50 ￭ °F: degrees Fahrenheit ￭ Default value: °C P9.2 Date and time The date and time on the 949 pH Meter are changed under P9.2. Use the buttons to change the year. Confirm the setting with the button. 3 Repeat steps 1 and 2 with the month and day and then with the hours and minutes.
  • Page 51 P9.7 displays the serial number of the 949 pH Meter. P9.8 Resetting settings P9.8 is used to reset all device settings to the default values. 1 If the 949 pH Meter does not work perfectly or if the wrong settings have been made, then select YES with the buttons.

  • Page 52: Maintenance

    Maintenance by the regional Metrohm service repre- sentative Maintenance of the 949 pH 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 or corrosive chemicals.

  • Page 53: Cleaning

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 6 Maintenance Cleaning Prerequisite: The instrument is switched off and disconnected from the energy sup- ￭ ply. Required accessories: Cleaning cloth (soft, lint-free) ￭ Deionized water or ethanol or isopropanol ￭ 1 Clean the surface with a damp cloth. Remove coarse contamination with ethanol.

  • Page 54: Troubleshooting

    Please read the corresponding leaflets on how to handle sensors correctly. Device If the 949 pH Meter may possibly be the cause of a measuring problem, then start by checking all configuration settings and parameter settings. The 949 pH Meter will use appropriate messages to notify you directly of problems during operation.

  • Page 55: Problems

    The measuring input Send the measuring instrument to your ￭ and/or the measuring regional Metrohm service representative for channel is defective. checks and, if necessary, repair. The measured value The glass membrane or the Clean the electrode following the instruc- ￭...

  • Page 56: Messages

    7.3 Messages ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Problem Cause Remedy A non-Metrohm power Use only the power supply unit provided ￭ supply unit is connected. during measurement operation. The measured value The pH calibration is faulty. Check and repeat the calibration. ￭ is evidently wrong.
  • Page 57 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 7 Troubleshooting Error message Meaning CALIBRATION TOO LONG The calibration has exceeded the time limit. Only the points calibrated up to that point are saved. ￭￭￭￭￭￭￭￭...

  • Page 58: Recycling And Disposal

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 8 Recycling and disposal Properly dispose of chemicals and of the product to reduce negative effects on the environment and public health. Local authorities, waste dis- posal companies or dealers provide more detailed information on disposal. Observe the WEEE EU directive (WEEE = Waste Electrical and Electronic Equipment) for the proper disposal of waste electronic equipment within the European Union.

  • Page 59: Appendix

    The temperature-dependent pH values of the important commercially available pH buffer solutions are stored in the device for automatic buffer recognition during pH calibration. In addition to the Metrohm buffer solutions, other reference buffers are also included in the tables. CAUTION...

  • Page 60: Metrohm

    9.1 Saved buffer series ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 9.1.1 Metrohm Table 5 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...

  • Page 61: Usa

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 9 Appendix NIST (according to DIN standard 19266, 2015-05) Temp. (°C) 1.68 4.00 6.86 9.18 12.45 1.68 4.01 6.86 9.18 12.45 1.69 4.01 6.85 9.14 12.29 1.69 4.02 6.84 9.11 12.13 1.70 4.03 6.84 9.07 11.99 1.70 4.04 6.83 9.04 11.84 1.71...
  • Page 62 9.1 Saved buffer series ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ NOTE 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. ￭￭￭￭￭￭￭￭...

  • Page 63: Technical Specifications

    -2 to 16 Resolution 0.1/0.01 Accuracy ±0.02 AUTO: 1–3 Calibration points CUSTOM: 2 user values Buffer recognition METROHM, USA, NIST Buffer display Calibration report Stability criterion LOW, MEDIUM, HIGH Measuring range -1,000 to +1,900 mV Resolution 1/0.1 mV Calibration points...
  • Page 64 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Outputs RS-232 Device voltage 5 V power supply unit Power supply unit voltage 100–240 V Noise level during normal operation max. 80 dB Nominal frequency range 50–60 Hz Maximum power consumption 200 mA Measurements 160 x 140 x 45 mm Weight 380 g Standards...

This manual is also suitable for:

2.949.02102.949.0220

Table of Contents