Operating manual Lab 850 69 24 pH 92 8 °C La TP b8 50 Laboratory pH meter ba75890e01 11/2009
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 4.7 11/2009 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Lab 850 4.8 5 45 49 50 51 51 52 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 53 5.1 5.2 5.3 5.4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1 Replacing the batteries . . . . . . . . . . . . . . . . . . . . Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 MODE CAL STO RCL SC 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 Status display indicator U pH BUFFER SET 18888 Time Baud No. Day.
Overview Lab 850 1.3 Socket field 1 2 3 4 5 Connectors: 1 pH electrode 2 Reference electrode 3 Temperature sensor 4 Power pack 5 RS 232 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 SI Analytics GmbH 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 59) 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: z has been damaged in transport z has been stored under adverse conditions for a lengthy period of time z is visibly damaged z 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 z Lab 850 laboratory meter z Power pack z 4 batteries 1.5 V Mignon type AA z Transparent cover z Operating manual 3.2 Initial commissioning Perform the following activities: z Insert batteries z Switch on the meter z Set the date and time z Connect the power pack (for line power operation only). Insert batteries 1 Open the battery compartment (1) on the underside of the meter.
Commissioning Lab 850 CAUTION Make sure that the poles of the batteries are the right way round. The ± signs on the batteries must correspond to the ± signs in the battery compartment. Only use leakproof alkaline manganese batteries. Switching on the meter Setting the date and time Connecting the power pack 1 Switch on the meter with . A display test is briefly displayed. 2 See page 43. You can either operate the measuring instrument with batteries or with the plug-in power supply.
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.
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? Buffer sets for calibration 22 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* 8 Mettler Toledo TEC * 9 Fisher * 10 11/2009 at 1.995 4.005 7.002 9.208 25 °C 2.007 4.002 7.004 10.002 25 °C 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 45).A list of the stored buffer sets can be downloaded to the interface (Set 1 ... 16) with while selecting the buffer set in the menu for measurement settings. _ Calibration points Calibration can be performed using one, two or three buffer solutions in any order (single-point, two-point or three-point calibration).
Lab 850 Operation Displaying the calibration data You can display the data of the last calibration (see page 36). Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a printer or PC, with the key. _ Note The calibration record is automatically transmitted to the interface after calibrating. Sample record: 16.09.2005 08:53:54 Lab 850 02320025 Calibration pH Cal time: 16.09.2005 08:22:14 Cal interval: 14 d AutoCal Buffer 1 2.000 Buffer 2 4.010 Buffer 3 7.
Operation Lab 850 CalClock Calibration record CalError CalError Zero point [mV] Slope [mV/pH] < -30 or > 30 ... -62 or ... -50 Eliminate the error according to page 55 Preparatory activities 26 1 Switch on the meter with . 2 Connect a pH electrode to the meter. 3 Keep the buffer solutions ready. 4 Adjust the temperature of the solutions and measure the current temperature if the measurement is made without temperature sensor.
Lab 850 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. After the specified calibration interval (Int.C) has expired, the outer ring of the CalClock flashes. It is still possible to measure.
Operation Lab 850 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. 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.
Lab 850 Operation 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.
Operation Lab 850 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 <▲><▼>.
Lab 850 Operation 4.5 Saving The pH meter has an internal data memory. It can store up to 800 datasets. A complete dataset consists of: z Date/time z Memory location number z ID number z Measured value z Temperature z Temperature measuring procedure (manual or automatic) You can transmit measured values (datasets) to the data memory in two ways: z Store manually () z Switch on AutoStore (Int.1) ().
Operation Lab 850 pH 6992 Ident 000 1 Store Message StoFull 3 Using <▲><▼>, enter the required ID number (1 ... 9999). 4 Confirm with . The dataset is stored. The meter switches to the measuring mode. This message appears when all of the 800 memory locations are occupied. When the memory is full, you can: 32 z press to store the current measured value.
Lab 850 Operation 4.5.2 Automatic storage at intervals (AutoStore) In order to store measured values automatically at certain time intervals, set the storage interval (Int.1). Setting the save interval The default setting for the storage interval (Int 1) is OFF. By this, the AutoStore function is switched off.
Operation Lab 850 4 Confirm with . Ident, the entry of the ID number is displayed. Ident 000 1 5 Set the required ID number with <▲><▼>. 6 Confirm with . The meter switches to the measured value display and starts the measuring and storing procedure. AutoStore flashes on the display. 7 As soon as all of the 800 memory locations are occupied, AutoStore is terminated (Int.1 = OFF).
Lab 850 Operation 4.5.3 Downloading the data memory You can download stored measurement datasets: z to the display z to the interface (page 39) Download to the display 1 Open the memory menu with . 2 If necessary, scroll with until Sto disp (measurement datasets) is displayed. 3 Press to display the dataset that was last stored. The memory location of the dataset is displayed for approx. 2 s, then the respective temperature appears.
Operation Lab 850 4.5.4 Erasing the data memory You can erase all stored measurement datasets. 1 Open the memory menu with . 2 If necessary, scroll with until Sto disp or Sto prt is displayed. 3 Press to erase the entire contents of the memory. or Return to the measured value display with . The stored data is retained. 4.5.5 _> to display the Clr All function.
Lab 850 Operation z press to display further calibration data (date, zero point, slope) z press <▲><▼> to switch over the unit of the zero point (Asy) (while the zero point is being displayed) z press <▲><▼> to switch over the unit of the slope (Slo) (while the slope is being displayed) Download to display via calibration menu 1 _ Press to display the calibration data. The following data is displayed consecutively for 10 seconds each: date, zero point, slope.
Operation Lab 850 4.6 Transmitting data The meter has a RS232 interface (serial port). Via the interface, you can transmit data to a PC and update the meter software. The RS232 interface enables to transmit data to an external printer. Note The relevant interface cable has to be connected if you want to download data to an interface (USB or RS232). CAUTION The interface is not galvanically separated.
Lab 850 Operation 4.6.1 Options for data transmission 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 which way: Data Control Operation / description Current measured values Manual z With . z Simultaneously with every manual storage process (see page 31). Automatic, at intervals _ z With . Then you can set the transmission interval (Int.2) (page 40).
Operation Lab 850 4.6.2 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 interval The default setting for the download interval (Int 2) is OFF. To switch the function on, set an interval (5 s, 10 s, 20 s, 30 s, 1 min, 2 min, 5 min, 10 min, 20 min, 30 min, 60 min): Press <▼>.
Lab 850 Operation 3 – Baud rate: selectable from 1200, 2400, 4800, 9600, – Handshake: RTS/CTS + Xon/Xoff – PC only: – Parity: none – Data bits: 8 – Stop bits: 2 Socket assignment (RS232) 3 4 2 6 5 1 RS 232 4.6.6 1* 2 RxD 3 TxD 4* 5 SGnd 6 CTS * not used Operation with MultiLab pilot With the aid of the MultiLab pilot software, you can record and evaluate measuring data with a PC. The data is transmitted after the meter is connected to the RS232 serial interface of a PC.
Operation Lab 850 4.7 Settings You can adapt the meter to your individual requirements. The settings are done in the following menus: z System settings () – Baud rate (Baud) – Switch-off interval (t.Off) – Date (Day.Month) – Date (Year) – Time (Time) _>) z Settings for calibration and measurement (
Lab 850 Operation 4.7.1 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) Any Date (Year) Any Time (Time) Any 1 Open the menu for system settings with . Baud rate (Baud) Baud 480 0 2 Set the required baud rate with <▲><▼> . 3 Confirm with . t.
Operation Lab 850 4 Set the switch-off interval with <▲><▼>. 5 Confirm with . Day.Month, the setting of the date is displayed. The day display flashes. Date and time Day.Month 44 300 3 6 Set the date of the current day with <▲><▼> . 7 Confirm with . The month display flashes. 8 Set the current month with <▲><▼> . 9 Confirm with . Year, the setting of the year is displayed. 10 Set the year with <▲><▼> . 11 Confirm with . The setting of the time is displayed.
Lab 850 Operation 4.7.2 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 slope (SLO) %, mV/pH Unit of the value for the zero point (ASY) pH, mV Resolution (rES) HI (0.001), Lo (0.
Operation Lab 850 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 46 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.
Lab 850 Operation 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 ba75890e01 11/2009 10 Using <▲><▼>, toggle between Hi (0.001)and Lo (0.01). 11 Confirm with . Unit, the setting of the unit of the temperature value is displayed.
Operation Lab 850 Temperature unit (Unit) Unit oC °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 48 TP d 14 14 Set the interval with <▲><▼>. 15 Confirm with . The measurement settings are completed. The meter switches to the measuring mode.
Lab 850 Operation 4.7.3 Interval for automatic storing (AutoStore) After setting the interval for automatic storing the current measurement dataset is stored at the specified interval. AutoStore interval (Int.1) 1 OFF, 5 s, 10 s, 20 s, 30 s, 1 min, 2 min, 5 min, 10 min, 20 min, 30 min, 60 min _ Press to open the setting for the storage interval. Int.1, the setting of the storage interval is displayed. AutoStore interval Time Int 1 100 Auto Store 2 Press <▲><▼> to select an interval.
Operation Lab 850 4.7.4 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 (Int.2) 1 OFF, 5 s, 10 s, 20 s, 30 s, 1 min, 2 min, 5 min, 10 min, 20 min, 30 min, 60 min _ Press to open the setting for the transmission interval. Int.2, the setting of the transmission interval is displayed.
Lab 850 Operation 4.8 Reset 4.8.1 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 % (-59.2 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. Init.C is displayed.
Operation Lab 850 4.8.2 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 51 System settings page 43 Measurement settings page 45 1 Switch on the meter with . The display test appears briefly on the display.
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 30, 2009 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 60 Stand October 30, 2009 EMC EC guideline 2004/108/EC EN 61326-1 Class B FCC Class A Instrument safety EC guideline 2006/95/EC 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 30, 2009 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 ...
Technical data Translation of the legally binding German version 62 Lab 850 Stand October 30, 2009 ba75890e01 11/2009
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 64 °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 ba75890e01 11/2009 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 O Authorized use . . . . . . . . . . . . . . . . . . . . . . 12 AutoCal . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 AutoStore . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Operation location . . . . . . . . . . . . . . . . . . . 17 Operational safety . . . . . . . . . . . . . . . . . . . 12 ORP electrode . . . . . . . . . . . . . . . . . . . . . . 21 ORP voltage . . . . . . . . . . . . . . . . . . . . . . . 21 B 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: z a free RS232 interface on your PC z 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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SI Analytics 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 Email: support@si-analytics.com Internet: www.si-analytics.
