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SCHOTT Instruments Lab 870 Operating Manual

Ba75555e0302/2007lab 870operating manuallaboratory ph meterwith automatic sensor recognition
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Operating manual
Lab 870
Laboratory pH meter
with automatic sensor recognition
ba75555e03
02/2007

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Summary of Contents for SCHOTT Instruments Lab 870

  • Page 1 Operating manual Lab 870 Laboratory pH meter with automatic sensor recognition ba75555e03 02/2007...
  • Page 2 To ascertain the warranty liability, return the instrument and proof of purchase together with the date of purchase freight paid or prepaid. CE conformity SCHOTT Instruments hereby declares that the Lab 870 meter is in compliance with the essential requirements and the other relevant provisions of Directive 1999/5/EC.
  • Page 3 Lab 870 ba75555e03 02/2007...
  • Page 4 Angaben im Kapitel the specifications in the indications du chapitre chapter Technische Daten pH-Meter Lab 870 10. Januar 2006 SCHOTT Instruments GmbH Hattenbergstr. 10 D-55122 Mainz Deutschland, Germany, Allemagne 10. Januar, January 10, 10 janvier 2006...

  • Page 5: Table Of Contents

    Contents Lab 870 - Contents Overview ........7 Keypad .
  • Page 6 Contents Lab 870 4.7.2 Resetting all meter settings ....47 Maintenance, cleaning, disposal ....49 Maintenance .

  • Page 7: Overview

    Lab 870 Overview Overview The compact Lab 870 precision pH meter enables you to perform pH measurements rapidly and reliably. The Lab 870 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven calibration procedures and special stability control function (SC) support your work with the pH meter.

  • Page 8: Keypad

    Overview Lab 870 Keypad In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. <OK>) indicates a keystroke in this operating manual. <On/Off>: Switch meter on / off <On/Off >: Reset calibration values <MODE>: Select measured parameter <MODE...

  • Page 9: Display

    Lab 870 Overview Display Status display indicator U pH BUFFER CalClock (calibration interval and sensor evaluation) ID sensor symbol mV/pH Time Baud °F Measured value Day.Month display Year °C Ident AutoCal Auto Store CalError Function and LoBat temperature display indicator...

  • Page 10: Socket Field

    Only connect sensors to the meter that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting). Almost all sensors - in particular SCHOTT Instruments sensors - fulfill these conditions. ba75555e03...

  • Page 11: Automatic Sensor Recognition

    The sensor data is automatically transmitted to the meter by radio and used for sensor identification there. Note You can also operate non-ID sensors with the Lab 870 meter. In this case, however, you will not be able to use the advantages of the sensor recognition function.
  • Page 12 Note Information on available ID sensors is given on the Internet or directly by SCHOTT Instruments. ID sensors connected to the Lab 870 meter are identified by the ID sensor symbol on the display of the meter. ID sensor symbol °C...

  • Page 13: Safety

    Lab 870 Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the meter. Consequently, all responsible personnel must read this operating manual before working with the meter. The operating manual must always be available within the vicinity of the instrument.

  • Page 14: Authorized Use

    Safety Lab 870 Authorized use This meter is authorized exclusively for pH and ORP measurements in the laboratory. The technical specifications as given in chapter 7 T ECHNICAL DATA (page 55) must be observed. Only the operation and running of the meter according to the instructions given in this operating manual is authorized.
  • Page 15 Lab 870 Safety Safe operation If safe operation is no longer possible, the instrument must be taken out of service and secured against inadvertent operation! Safe operation is no longer possible if the meter: has been damaged in transport has been stored under adverse conditions for a lengthy period of...
  • Page 16 Safety Lab 870 ba75555e03 02/2007...

  • Page 17: Commissioning

    Lab 870 Commissioning Commissioning Scope of delivery Lab 870 laboratory meter Power pack 4 batteries 1.5 V Mignon type AA USB cable with A plug and B plug Transparent cover Stand with stand base (S4D) Operating manual CD-ROM with USB driver...

  • Page 18: Z865 Stand (S4D)

    Commissioning Lab 870 Connect the original power pack to an easily accessible power outlet. Note You can carry out measurements without the power pack. 3.2.1 Z865 stand (S4D) The meter can be inserted in the stand base on the right or left side of the electrode holder.

  • Page 19: Operation

    Lab 870 Operation Operation Switching on the meter Place the meter on a flat surface and protect it from intense light and heat. Press the <On/Off> key. A display test is briefly displayed. Subsequently, the meter switches to the measuring mode (measured value display).

  • Page 20: General Operating Principles

    Operation Lab 870 General operating principles This section contains basic information on the operation of the Lab 870. 4.2.1 Operating modes The instrument has the following operating modes: Measurement The display indicates the measurement data in the measured value display...

  • Page 21: Measuring

    Lab 870 Operation Measuring Preparatory activities Perform the following preparatory activities when you want to measure: Connect an electrode to the meter. Adjust the temperature of the buffer solutions or test solutions, or measure the current temperature, if you measure without a temperature sensor.

  • Page 22: Measuring The Ph Value

    Operation Lab 870 4.3.1 Measuring the pH value Perform the preparatory activities according to page 21. Immerse the pH electrode in the test sample. Using <MODE>, scroll as necessary until the measured parameter pH is displayed. °C Stability control SC...

  • Page 23: Measuring The Orp

    Lab 870 Operation 4.3.2 Measuring the ORP The meter can, in conjunction with an ORP electrode, measure the ORP (mV) of a solution. Perform the preparatory activities according to page 21. Immerse the ORP electrode in the test sample. If necessary, call up the measured parameter U with <MODE>.

  • Page 24: Calibration

    The pH values are valid for the specified temperature values. The temperature dependence of the pH values is taken into account during calibration. Buffer set* pH values SCHOTT Instruments DIN buffers 1.679 25 °C according to DIN 19266/NBS 4.006 6.865...
  • Page 25 Lab 870 Operation Buffer set* pH values Mettler Toledo USA * 1.679 25 °C 4.003 7.002 10.013 Mettler Toledo TEC * 1.995 25 °C 4.005 7.002 9.208 Fisher * 2.007 25 °C 4.002 7.004 10.002 Fluka BS * 4.006 25 °C 6.984...
  • Page 26 Operation Lab 870 Note The buffer set is selected in the menu for measurement settings (see page 41). A list of the stored buffer sets can be downloaded to the interface (Set 1 ... 16) with <CAL > while selecting the buffer set in the menu for measurement settings.
  • Page 27 Lab 870 Operation Displaying the You can display the data of the last calibration (see page 33). calibration data Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a printer or PC, with the <CAL >...
  • Page 28 Operation Lab 870 CalClock Calibra- Zero point Slope tion record [mV] [mV/pH] Clean the electrode according to the sensor operating manual < -30 or ... -62 or CalError CalError > 30 ... -50 Eliminate the error according to page 51 Preparatory activities Switch on the meter with <On/Off>.

  • Page 29: Calibration Interval (Int.c)

    Lab 870 Operation 4.4.1 Calibration interval (Int.C) The calibration interval and calibration evaluation are indicated on the display as the CalClock. CalClock The remaining time of the calibration interval is indicated by the segmented ring around the calibration evaluation. This segmented ring reminds you to calibrate regularly.

  • Page 30: Automatic Calibration (Autocal)

    Operation Lab 870 4.4.2 Automatic calibration (AutoCal) For this procedure, use one, two or three buffer solutions of the selected buffer set in any order. Note The steps 2, 6 and 10 are not necessary if you use a temperature sensor.
  • Page 31 Lab 870 Operation BUFFER °C AutoCal Note Here you can cancel the calibration procedure with <MODE>. This corresponds to a single-point calibration. The value of the zero point (Asy) is displayed for 10 seconds, then the value of the slope (Slo) is displayed for 10 seconds.
  • Page 32 Operation Lab 870 Note Here you can cancel the calibration procedure with <MODE>. This corresponds to a two-point calibration. The value of the zero point (Asy) is displayed for 10 seconds, then the value of the slope (Slo) is displayed for 10 seconds. After this the meter switches to the measuring mode.

  • Page 33: Downloading Calibration Data

    Lab 870 Operation Note While the zero point (ASY) is being displayed, you can change the unit of the zero point with <L><M> . While the slope (SLO) is being displayed, you can change the unit of the slope with <L><M> .

  • Page 34: Transmitting Data

    Operation Lab 870 Transmitting data The meter has two interfaces: RS232 interface (serial port) USB interface (device) Via both interfaces, you can transmit data to a PC and update the meter software. The meter is supplied with power via the USB interface.

  • Page 35: Options For Data Transmission

    Lab 870 Operation 4.5.1 Options for data transmission Via the USB interface you can transmit data to a PC. Via the RS 232 interface, you can transmit data to a PC or an external printer. The following table shows which data are transmitted to the interface in...

  • Page 36: Automatically Downloading Measurement Datasets At Intervals

    Operation Lab 870 4.5.2 Automatically downloading measurement datasets at intervals In order to automatically download to the interface measured values at certain time intervals, set the download interval (Int.2). Setting the download The default setting for the download interval (Int 2) is OFF.

  • Page 37: Usb Interface (Device)

    Lab 870 Operation 4.5.4 USB interface (device) Connect the interface to the PC via the supplied Z875 USB cable. The data output automatically switches to USB. The RS232 interface is deactivated. Installation of the USB System requirements of the PC for installation of the USB driver:...

  • Page 38: Settings

    Operation Lab 870 Settings You can adapt the meter to your individual requirements. The settings are done in the following menus: System settings (<OK >) – Baud rate (Baud) – Switch-off interval (t.Off) – Date (Day.Month) – Date (Year) – Time (Time) Settings for calibration and measurement (<MODE...

  • Page 39: System Settings

    Lab 870 Operation 4.6.1 System settings The default setting is printed in bold. Baud rate (Baud) 1200, 2400, 4800, 9600 Switch-off interval (t.Off) 10, 20, 30, 40, 50 min, 1, 2, 3, 4, 5, 10, 15, 20, 24 h Date (Day.Month)
  • Page 40 Operation Lab 870 Set the switch-off interval with <L><M>. Confirm with <OK>. Day.Month, the setting of the date is displayed. The day display flashes. Date and time Day.Month Set the date of the current day with <L><M> . Confirm with <OK>.

  • Page 41: Measurement Settings

    Lab 870 Operation 4.6.2 Measurement settings These settings apply to calibration and measurement (the default setting is printed in bold). Number of the buffer set for pH 1 ... 16 calibration (SET) Display during calibration (BUFFER) pH (buffer nominal value),...
  • Page 42 Operation Lab 870 Display during calibration (bUFF) AutoCal Using <L><M>, select the display during calibration pH or U. Confirm with <OK>. SLO, the unit of the value for the slope (mV/pH or %) is displayed. Unit of the value for the...
  • Page 43 Lab 870 Operation Unit of the value for the zero point (ASY) Using <L><M>, select the unit for the zero point. Confirm with <OK>. rES, the setting of the resolution is displayed. Resolution (rES) Using <L><M>, toggle between Hi and Lo.
  • Page 44 Operation Lab 870 Temperature unit (Unit) °C Using <L><M>, toggle between °C and °F. Confirm with <OK>. Int.C, the setting of the calibration interval is displayed. Calibration interval (Int.C) Time AutoCal Set the interval with <L><M>. Confirm with <OK>. The measurement settings are completed.

  • Page 45: Interval For Automatic Data Transmission

    Lab 870 Operation 4.6.3 Interval for automatic data transmission The interval for automatic data transmission serves to transmit the current measurement dataset to the interface at the specified interval. Data transmission interval OFF, 5 s, 10 s, 30 s, 1 min, (Int.2)

  • Page 46: Reset

    Operation Lab 870 Reset 4.7.1 Resetting calibration values This function resets the calibration values to the default condition. All other meter settings are retained. Calibration values in the Zero point pH 7.000 (0 mV) default condition Slope 100 % (-59.16 mV/pH) Note The measuring system is not calibrated after a reset.

  • Page 47: Resetting All Meter Settings

    Lab 870 Operation 4.7.2 Resetting all meter settings This function resets to the default condition all meter settings including the calibration values. The corresponding values are given on the following pages: Calibration values page 46 System settings page 39 Measurement settings...
  • Page 48 Operation Lab 870 ba75555e03 02/2007...

  • Page 49: Maintenance, Cleaning, Disposal

    Lab 870 Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The only maintenance activity required is replacing the batteries. Note For maintenance of the electrodes refer to the relevant operating manuals. 5.1.1 Replacing the batteries Open the battery compartment (1) on the underside of the meter.

  • Page 50: Cleaning

    Maintenance, cleaning, disposal Lab 870 Cleaning Occasionally wipe the outside of the meter with a damp, lint-free cloth. Disinfect the housing with isopropanol as required. Caution The housing is made of synthetic material (ABS). Thus, avoid contact with acetone or similar detergents that contain solvents.

  • Page 51: What To Do If

    Lab 870 What to do if... What to do if... Error message Cause Remedy Err1 pH electrode: – Measured value outside the – Use a suitable electrode measuring range – Air bubble in front of the – Remove air bubble junction –...
  • Page 52 What to do if... Lab 870 Cause Remedy – Incorrect buffer solutions – Change calibration procedure – Buffer solutions too old – Use only once. Note the shelf life – Buffer solutions depleted – Change solutions No stable measured Cause...
  • Page 53 Lab 870 What to do if... Display Cause Remedy – Time-out of the interface – Check that the instrument is connected Obviously incorrect Cause Remedy measured values pH electrode: – pH electrode unsuitable – Use a suitable electrode – Temperature difference –...
  • Page 54 What to do if... Lab 870 ba75555e03 02/2007...

  • Page 55: Technical Data

    Lab 870 Technical data Translation of the legally binding German version State January 10, 2006 Technical data General data Dimensions approx. 240 x 190 x 80 mm Weight approx. 1.0 kg (without power pack, without stand) Mechanical structure Type of protection...
  • Page 56 Technical data Lab 870 Translation of the legally binding German version State January 10, 2006 Guidelines EC guideline 89/336/EEC and norms used EN 61326 EN 61000-3-2 EN 61000-3-3 FCC Class A Instrument safety EC guideline 73/23/EEC EN 61010-1 ANSI/UL 61010-1 CAN/CSA-C22.2 No.

  • Page 57: Measuring Ranges, Resolution, Accuracy

    Lab 870 Technical data Translation of the legally binding German version State January 10, 2006 Measuring ranges, resolution, accuracy Measuring ranges, Variable Measuring range Resolution resolution - 2.000 ... + 19.999 0.001 - 2.00 ... + 19.99 0.01 U [mV] - 999.9 ...
  • Page 58 Technical data Lab 870 Translation of the legally binding German version State January 10, 2006 ba75555e03 02/2007...

  • Page 59: Lists

    Lab 870 Lists Lists This chapter provides additional information and orientation aids. Abbreviations The list of abbreviations explains abbreviations that appear on the display or when dealing with the instrument. Specialist terms The glossary briefly explains the meaning of the specialist terms.
  • Page 60 Lists Lab 870 Abbreviations °C Temperature unit °Celsius °F Temperature unit, °Fahrenheit Zero point (asymmetry) AutoCal Automatic calibration using a selected buffer set Calibration CalError Error message (see W ...) HAT TO DO IF Err1 Overflow Display range exceeded Err2, Err4 Error message (see W ...)
  • Page 61 Lab 870 Lists Glossary Asymmetry see zero point Resolution Smallest difference between two measured values that can be displayed by a meter. AutoRange Name of the automatic selection of the measuring range. Junction The junction is a porous body in the housing wall of reference electrodes or electrolyte bridges.
  • Page 62 Lists Lab 870 Potentiometry Name of a measuring technique. The signal (depending on the measured parameter) of the electrode is the electrical potential. The electrical current remains constant. ORP voltage The ORP is caused by oxidizing or reducing substances dissolved in water if these substances become effective on an electrode surface (e.
  • Page 63 Lab 870 Lists Trademarks used Trademark Owner of the trademark Merck Merck KGaA Mettler Toledo Mettler Toledo Fisher Fisher Scientific Company Fluka Fluka AG Radiometer Radiometer Baker Mallinckrodt Baker, Inc. Metrohm Metrohm AG Beckman Beckman Instruments, Inc. Hamilton Hamilton Company Corporation...
  • Page 64 Lists Lab 870 ba75555e03 02/2007...
  • Page 65 Lab 870 Lists Index Operational safety ....14 ORP electrode ..... . 23 Authorized use .
  • Page 66 Lists Lab 870 ba75555e03 02/2007...
  • Page 67 Connect the Lab 870 to a USB interface (virtual COM port) of the PC with the aid of the USB interface cable Z875. Connect the Lab 870 to a serial interface (COM port) of the PC with the aid of the interface cable Z390.
  • Page 68 Lab 870 After switching the meter off and on you can check whether the meter has taken over the new software version (see page 53). ba75555e03 02/2007...
  • Page 69 SCHOTT Instruments GmbH Postfach 2443 D-55014 Mainz Hattenbergstr. 10 D-55122 Mainz Telefon +49 (0) 61 31/66 5111 Telefax +49 (0) 61 31/66 5001 Internet: www.schottinstruments.com...

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