Operating manual Lab 850 69 24 pH 92 8 °C La TP b8 50 Laboratory pH meter ba75553e03 01/2006 DRAFT:February 6, 2006
Lab 850 Accuracy when going to press Warranty The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions.
Lab 850 KONFORMITÄTSERKLÄRUNG DECLARATION OF CONFORMITY DÉCLARATION DE CONFORMITÉ Wir erklären in alleiniger Verantwortung, dass das Produkt We declare under our sole responsibility that the product Nous déclarons sous notre seule responsabilité que le produit pH-Meter Lab 850 pH meter Lab 850 pH-mètre Lab 850 auf das sich diese Erklärung bezieht, übereinstimmt mit den Angaben im Kapitel to which this declaration relates is in conformity with the specifications in the chapter auquel se réfère cett
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Lab 850 Contents Lab 850 - Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 1.2 1.3 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 2.2 3 4.3 4.4 4.5 4.6 5.2 5.3 5.4 01/2006 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . General operating principles . . . . . . . . . . . . . . . . . . . . . . 4.2.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 4.2.
Contents Lab 850 6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 7.1 7.2 8 6 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 49 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lab 850 Overview 1 Overview The compact Lab 850 precision pH meter enables you to perform pH measurements rapidly and reliably. The Lab 850 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.
Overview Lab 850 1.1 Keypad In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. ) indicates a keystroke in this operating manual.
Lab 850 Overview 1.2 Display SET Status display indicator U pH BUFFER 18888 Time Day.Month Year LoBat Function display indicators ba75553e03 01/2006 Baud No.
Overview Lab 850 1.3 Socket field Connectors: 1 pH electrode 2 Reference electrode 3 Temperature sensor 4 Power pack 5 Service interface Caution 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.
Lab 850 Safety 2 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. Target group Safety instructions The meter was developed for work in the laboratory.
Safety Lab 850 2.1 Authorized use This meter is authorized exclusively for pH and ORP measurements in the laboratory. The technical specifications as given in chapter 7 TECHNICAL DATA (page 47) must be observed. Only the operation and running of the meter according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized. 2.
Lab 850 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 time ! is visibly damaged ! no longer operates as described in this manual. If you are in any doubt, please contact the supplier of the instrument.
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Lab 850 Commissioning 3 Commissioning 3.1 Scope of delivery ! Lab 850 laboratory meter ! Power pack ! 4 batteries 1.5 V Mignon type AA ! Transparent cover ! Stand with stand base (S4D) ! Operating manual ! CD-ROM 3.2 Initial commissioning Perform the following activities: ! Switch on the meter ! Set the date and time ! Connect the power pack (for line power operation only). Switching on the meter Setting the date and time 1 Switch on the meter with . A display test is briefly displayed.
Commissioning Lab 850 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. 1 Insert the stand rod in the stand base. 2 Insert the meter in the stand base.
Lab 850 Operation 4 Operation 4.1 Switching on the meter 1 Place the meter on a flat surface and protect it from intense light and heat. 2 Press the key. A display test is briefly displayed. Subsequently, the meter switches to the measuring mode (measured value display). Note The meter has an energy saving feature to avoid unnecessary battery depletion during battery operation.
Operation Lab 850 4.2 General operating principles This section contains basic information on the operation of the Lab 850. 4.2.1 Operating modes The instrument has the following operating modes: ! Measurement The display indicates the measurement data in the measured value display ! Calibration The display guides you thru a calibration procedure with calibration information ! Configuration The system menu or a sensor menu with submenus, settings and functions is displayed 4.2.
Lab 850 Operation 4.3 Preparatory activities Measuring Perform the following preparatory activities when you want to measure: 1 Connect an electrode to the meter. 2 Adjust the temperature of the buffer solutions or test solutions, or measure the current temperature, if you measure without a temperature sensor. 3 Calibrate or check the meter with the electrode. 4 Select the measured parameter with . Note Incorrect calibration of pH electrodes leads to incorrect measured values.
Operation Lab 850 4.3.1 Measuring the pH value 1 Perform the preparatory activities according to page 19. 2 Immerse the pH electrode in the test sample. 3 Using , scroll as necessary until the measured parameter pH is displayed. pH 6992 248 Stability control SC (drift control) TP °C The stability control function (drift control) checks the stability of the measurement signal. The stability has a considerable effect on the reproducibility of the measured value.
Lab 850 Operation 4.3.2 Measuring the ORP The meter can, in conjunction with an ORP electrode, measure the ORP (mV) of a solution. 1 Perform the preparatory activities according to page 19. 2 Immerse the ORP electrode in the test sample. 3 If necessary, call up the measured parameter U with . 4 Wait for a stable measured value. U 486 213 mV TP °C Note ORP electrodes are not calibrated. However, you can check ORP electrodes using a test solution.
Operation Lab 850 4.4 Why calibrate? When do you have to calibrate? Calibration pH electrodes age. This changes the zero point (asymmetry) and slope of the pH electrode. As a result, an inexact measured value is displayed. Calibration determines the current values of the zero point and slope of the electrode and stores them. Thus, you should calibrate at regular intervals. The calibration data is stored in the meter.
Lab 850 Operation No. Buffer set* 7 Mettler Toledo USA * 1.679 4.003 7.002 10.013 25 °C 8 Mettler Toledo TEC * 1.995 4.005 7.002 9.208 25 °C 9 Fisher * 2.007 4.002 7.004 10.002 25 °C 10 Fluka BS * 4.006 6.984 8.957 25 °C 11 Radiometer * 1.678 4.005 7.000 9.180 25 °C 12 Baker * 4.006 6.991 10.008 25 °C 13 Metrohm * 3.996 7.003 8.999 25 °C 14 Beckman * 4.005 7.005 10.013 25 °C 15 Hamilton Duracal * 4.005 7.002 10.013 25 °C 16 Precisa * 3.996 7.003 8.
Operation Lab 850 Note The buffer set is selected in the menu for measurement settings (see page 34). Calibration points Calibration can be performed using one, two or three buffer solutions in any order (single-point, two-point or three-point calibration). The meter determines the following values and calculates the calibration line as follows: 1-point Determined values Displayed calibration data ASY ! Zero point = ASY ! Slope = Nernst slope (-59.
Lab 850 Operation Displaying the calibration data Calibration evaluation You can display the data of the last calibration (see page 30). After calibrating, the meter automatically evaluates the calibration. The zero point and slope are evaluated separately. The worse evaluation of both is taken into account.The evaluation appears on the display as the CalClock and in the calibration record. CalClock Zero point [mV] Slope [mV/pH] -15 ... +15 -60.5 ... -58 -20 ... +20 -58 ... -57 -25 ... +25 -61 ..
Operation Lab 850 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. After the specified calibration interval (Int.C) has expired, the outer ring of the CalClock flashes. It is still possible to measure.
Lab 850 Operation 4.4.2 Automatic calibration (AutoCal) For this procedure, use 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. 1 Start the calibration with . The number of the specified buffer set is displayed (SET 1 ... 16). The first buffer (BUFFER 1) of the buffer set (SET_x) is requested.
Operation Lab 850 SET 1 AutoCal pH BUFFER 2 258 TP °C Note Here you can cancel the calibration procedure with . 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. After this the meter switches to the measuring mode. Continue with two-point calibration 5 Thoroughly rinse the electrode with distilled water.
Lab 850 Operation Note Here you can cancel the calibration procedure with . 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. Continue with threepoint calibration 9 Thoroughly rinse the electrode with distilled water. 10 If necessary, set the temperature of the third buffer solution with <▲><▼>.
Operation Lab 850 4.4.3 1 Downloading calibration data _ Press to display the calibration data. The following data is displayed consecutively for 10 seconds each: date, zero point, slope.
Lab 850 Operation 4.5 Settings You can adapt the meter to your individual requirements. The settings are done in the following menus: ! System settings () – Switch-off interval (t.Off) – Date (Day.Month) – Date (Year) – Time (Time) ! Settings for calibration and measurement () – Number of the buffer set for pH calibration (Set 1 ...
Operation Lab 850 4.5.1 System settings The default setting is printed in bold. Switch-off interval (t.Off) 10, 20, 30, 40, 50 min, 1, 2, 3, 4, 5, 10, 15, 20, 24 h Date (Day.Month) Any Date (Year) Any Time (Time) Any 1 _>. Open the menu for system settings with <▼>. 3 Confirm with . Day.Month, the setting of the date is displayed. The day display flashes.
Lab 850 ba75553e03 Operation 01/2006 4 Set the date of the current day with <▲><▼> . 5 Confirm with . The month display flashes. 6 Set the current month with <▲><▼> . 7 Confirm with . Year, the setting of the year is displayed. 8 Set the year with <▲><▼> . 9 Confirm with . The setting of the time is displayed. The hour display flashes. 10 Set the current hour with <▲><▼> . 11 Confirm with . The minute display flashes. 12 Set the current minute with <▲><▼> .
Operation Lab 850 4.5.2 Measurement settings These settings apply to calibration and measurement (the default setting is printed in bold). Buffer set for pH calibration (SET) Number of the buffer set for pH calibration (SET) 1 ... 16 Display during calibration (BUFFER) pH (buffer nominal value), U (electrode voltage) Unit of the value for the zero point (ASY) pH, mV Unit of the value for the slope (SLO) %, mV/pH Temperature unit (UnIt) °C, °F Calibration interval (Int.C) 0 ... 7 ...
Lab 850 Operation Display during calibration (bUFF) pH b UF F AutoCal pH 4 Using <▲><▼>, select the display during calibration pH or U. 5 Confirm with . SLO, the unit of the value for the slope (mV/pH or %) is displayed. Unit of the value for the slope (SLO) pH SL O ba75553e03 01/2006 mV/pH 6 Using <▲><▼>, select the unit for the slope. 7 Confirm with . ASY, the unit of the value for the zero point (mV or pH) is displayed.
Operation Lab 850 Unit of the value for the zero point (ASY) pH ASY mV 8 Using <▲><▼>, select the unit for the zero point. 9 Confirm with . rES, the setting of the resolution is displayed. Resolution (rES) pH res HI 36 10 Using <▲><▼>, toggle between Hi and Lo. 11 Confirm with . Unit, the setting of the unit of the temperature value is displayed.
Lab 850 Operation Temperature unit (Unit) Unit oC TP °C 12 Using <▲><▼>, toggle between °C and °F. 13 Confirm with . Int.C, the setting of the calibration interval is displayed. Calibration interval (Int.C) Time INT C AutoCal ba75553e03 01/2006 d 14 14 Set the interval with <▲><▼>. 15 Confirm with . The measurement settings are completed. The meter switches to the measuring mode.
Operation Lab 850 4.6 Reset 4.6.1 Resetting calibration values This function resets the calibration values to the default condition. All other meter settings are retained. Calibration values in the default condition Zero point pH 7.000 (0 mV) Slope 100 % (-59.16 mV/pH) Note The measuring system is not calibrated after a reset. Before measuring recalibrate the meter. Resetting calibration values 1 _ Press to open the menu for the reset of the calibration data. Ini.C is displayed.
Lab 850 Operation 4.6.2 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: Resetting the meter settings Calibration values page 38 System settings page 32 Measurement settings page 34 1 Switch on the meter with . The display test appears briefly on the display.
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Lab 850 Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 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 1 Open the battery compartment (1) on the underside of the meter. 2 Remove the four batteries from the battery compartment. 3 Place four new batteries (type Mignon AA) in the battery compartment.
Maintenance, cleaning, disposal Lab 850 5.2 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. Remove any splashes immediately. 5.3 Packing This meter is sent out in a protective transport packing. We recommend: Keep the packing material.
Lab 850 What to do if... 6 Error message Err1 Error message Err2 What to do if...
What to do if... Lab 850 Cause No stable measured value Remedy – Incorrect buffer solutions – Change calibration procedure – Buffer solutions too old – Use only once.
Lab 850 What to do if...
What to do if...
Lab 850 Technical data Translation of the legally binding German version Dimensions Weight Mechanical structure Stand October 10, 2005 7 Technical data 7.1 General data approx. 240 x 190 x 80 mm approx. 1.0 kg (without power pack, without stand) Type of protection IP 43 Electrical safety Protective class III Test certificates cETLus Ambient conditions Storage - 25 °C ... + 65 °C Operation 0 °C ... + 55 °C Climatic class 2 Batteries 4 x 1.
Technical data Lab 850 Translation of the legally binding German version Guidelines and norms used 48 Stand October 10, 2005 EMC EC guideline 89/336/EEC 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.
Lab 850 Technical data Translation of the legally binding German version 7.2 Measuring ranges, resolution Manual temperature input Accuracy (± 1 digit) Stand October 10, 2005 Measuring ranges, resolution, accuracy Variable Measuring range Resolution pH - 2.000 ... + 19.999 - 2.00 ... + 19.99 0.001 0.01 U [mV] - 999.9 ... + 999.9 - 2000 ... + 2000 0.1 1 T [°C] - 5.0 ... + 120.0 0.1 T [°F] + 23.0 ... + 248.0 0.1 Variable Range Increment Tmanual [°C] - 25 ...
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Lab 850 Lists 8 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. However, terms that should already be familiar to the target group are not described here. Trademarks used The list comprises the trademarks used in the present document and their owners.
Lists Lab 850 Abbreviations 52 °C Temperature unit °Celsius °F Temperature unit, °Fahrenheit ASY Zero point (asymmetry) AutoCal Automatic calibration using a selected buffer set Cal Calibration CalError Error message (see WHAT TO DO IF...) Err1 Overflow Display range exceeded Err2, Err4 Error message (see WHAT TO DO IF...
Lab 850 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. It arranges the electrical contact between two solutions and makes the electrolyte exchange more difficult. The expression, junction, is also used for ground or junctionless transitions.
Lists Lab 850 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. g. a gold or platinum surface). Reset Restoring the original condition of all settings of a measuring system.
Lab 850 Lists Trademarks used ba75553e03 01/2006 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.
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Lab 850 Lists Index A Authorized use . . . . . . . . . . . . . . . . . . . . . . 12 AutoCal . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 AutoRead . . . . . . . . . . . . . . . . . . . . . . . . . . 20 ORP electrode . . . . . . . . . . . . . . . . . . . . . . 21 ORP voltage . . . . . . . . . . . . . . . . . . . . . . . 21 P B pH buffer sets . . . . . . . . . . . . . . . . . . . . . . 22 Precautions . . . . . . . . . . . . . . . . . . . . . . . . 11 Battery compartment . . . . . . . . . .
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Lab 850 Appendix: Firmware update General information With the Update_Labxxx_MxxxP program and a PC you can update the firmware of the Lab 850 to the newest version. For the update you need: ! a free RS232 interface on your PC ! the RS232 cable, Z390. Program installation Program start With the installation program, "Install_Update_Labxxx_MxxxP_Vx_yy_English.exe", install the firmware update program on your PC. Start the "Update_Labxxx_MxxxP" program from the Windows start menu.
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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.
