SCHOTT handylab multi 12 Operating Manual
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SCHOTT handylab multi 12 Operating Manual

Ph/dissolved oxygen/conductivity measuring instrument
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Operating manual
handylab multi 12
pH/Dissolved Oxygen/Conductivity
Measuring Instrument
ba75371e01
11/2002

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  • Page 1 Operating manual handylab multi 12 pH/Dissolved Oxygen/Conductivity Measuring Instrument ba75371e01 11/2002...
  • Page 2 © Copyright Mainz, Schott-Geräte GmbH, 2002 Reproduction in whole - or even in part - is prohibited without the ex- press written permission of Schott-Geräte GmbH, Mainz. Printed in Germany.

  • Page 3: Table Of Contents

    12 List of contents Overview ........5 General features .
  • Page 4 List of contents handylab multi 12 4.7.2 PC/external printer (RS232 interface) ..57 4.7.3 Remote control ......57 Configuration .

  • Page 5: Overview

    Overview Overview General features The compact precision handheld meter handylab multi 12 enables you to carry out pH measurements, dissolved oxygen (D. O.) measure- ments and conductivity measurements quickly and reliably. The handylab multi 12 handheld meter provides the maximum degree of operating comfort, reliability and measuring certainty for all applica- tions.

  • Page 6: Keypad

    Overview handylab multi 12 Keypad RUN/ENTER Key functions Select the measured variable <M>: – pH value / ORP voltage – D. O. concentration / D. O. saturation – Conductivity / salinity Save a measured value <STO> Switch measuring instrument on/off <ON/OFF>...

  • Page 7: Display

    12 Overview Display Status display Sensor symbol mV/pH % mg/l Meas. value display mbar 1/ cm Sal Time Baud Function and ° Day.Month No. ° Year Ident temperature display Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Jack field D.

  • Page 8: Operating Structure

    Overview handylab multi 12 1.5 Operating structure The following overview diagram shows which keys you have to press to select between the different measuring modes: Note When a D. O. probe or a conductivity measuring cell with a temperature probe is connected, the measuring instrument recognizes the probe or measuring cell and automatically switches to the oxygen measuring mode or conductivity measuring mode last selected.

  • Page 9: Technical Data

    12 Overview Technical data Dimensions Length [mm] and weight Width [mm] Height [mm] Weight [kg] approx. 0.3 Mechanical structure Type of protection IP 66 Electrical safety Protective class Test certificates GS, cETLus, CE Ambient conditions Storage - 25 °C ... + 65 °C Operation -10 °C ...
  • Page 10 Overview handylab multi 12 Precision of Concentration ± 0.5 % of measured value Oxi (± 1 digit) at ambient temperature of 5 °C ... 30 °C Saturation ± 0.5 % of measured value when measuring in the range of ± 10 K around the calibration temperature Temperature <...
  • Page 11 12 Overview Serial interface Automatic switchover if a PC or printer is connected. Type RS232, data output Baud rate Can be set to 1200, 2400, 4800, 9600 Baud Data bits Stop bit Parity None Handshake RTS/CTS + Xon/Xoff Cable length Max.

  • Page 12: Handylab Multi

    Overview handylab multi 12 Applicable EEC guideline 89/336/EWG guidelines and norms EN 61326-1:1997 EN 61000-3-2:1995 + pr A14:2000 EN 61000-3-3:1995 FCC Class A Instrument safety EC guideline 73/23/EWG EN 61010-1 A2:1995 Climatic class VDI/VDE 3540 Type of protection EN 60529:1991...

  • Page 13: Safety

    12 Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the measur- ing instrument. Consequently, all responsible personnel must read this operating manual carefully before working with the measuring system.

  • Page 14: General Safety Instructions

    Safety handylab multi 12 General safety instructions This instrument is built and inspected according to the relevant guide- lines and norms for electronic measuring instruments (see section 1.6 T ECHNICAL DATA It left the factory in a safe and secure technical condition.

  • Page 15: Commissioning

    12 Commissioning Commissioning Scope of delivery l handylab multi 12 handheld meter l Operating manual and short operating manual l 4 batteries, 1.5 V Mignon type AA (in the instrument) Initial commissioning Perform the following activities: l Set the date and time...
  • Page 16 Warning Use original plug-in power supplies only (see section 1.6 T ECHNICAL DATA Plug the jack (1) into the socket (2) of the measuring instru- ment. Connect the original SCHOTT plug-in power supply (3) to an easily accessible mains socket.

  • Page 17: Operation

    12 Operation Operation Switching on the measuring instrument Press the <ON/OFF> key. The display test appears briefly on the display. After this, the measuring instrument automatically switches to the measuring mode. Measuring mode when Connected sensor Measuring mode...

  • Page 18: Ph Value / Orp Voltage

    Operation handylab multi 12 pH value / ORP voltage 4.2.1 General information Preparatory activities Perform the following preparatory activities when you want to measure: Connect the pH electrode to the measuring instrument. If necessary, press the <M> key repeatedly until the status dis- play pH (pH measurement) or U (measurement of the ORP voltage) appears.
  • Page 19 12 Operation Temperature measure- You can perform pH measurements with or without a temperature ment in pH measure- probe as well as with the temperature probe of an oxygen sensor or a ments conductivity measuring cell. The measuring instrument recognizes which sensors are connected and switches automatically to the correct mode for the temperature measurement.

  • Page 20: Measuring The Ph Value

    Operation handylab multi 12 4.2.2 Measuring the pH value Perform the preparatory activities according to section 4.2.1. Immerse the pH electrode in the test sample. Press the < > < > keys until pH appears in the status display. The pH value appears on the display.

  • Page 21: Measuring The Orp Voltage

    12 Operation Start AutoRead with <RUN/ENTER>. AR flashes until a stable measured value is reached. This measured value is transmitted to the interface. If necessary, start the next AutoRead measurement with <RUN/ENTER>. To terminate the AutoRead function: Press the <AR> key.

  • Page 22: Ph Calibration

    – after a voltage interruption, e. g. after changing the batteries AutoCal TEC is specially matched to the SCHOTT technical buffer solutions as a fully automatic two-point calibration. The buffer solutions are automatical- ly recognized by the measuring instrument. Depending on the instru- ment setting (see section 4.8 C...
  • Page 23 12 Operation Sample printout: CALIBRATION PROTOCOL 02.03.01 14:19 Device No.: 12345678 Calibration pH Cal time: 01.03.01 / 15:20 Cal interval: AutoCal TEC Tauto Buffer 1 2.00 Buffer 2 4.01 Buffer 3 7.00 * Buffer 4 10.01 184.1 mV 25.0°C...
  • Page 24 25 °C: 2.00 / 4.01 / 7.00 / 10.01). Note The calibration for pH 10.01 is optimized for the SCHOTT technical buffer solution pH 10.01. Other buffer solutions can lead to an errone- ous calibration. The correct buffer solutions are given in the SCHOTT catalog or in the Internet.
  • Page 25 12 Operation % mg/l mbar 1/ cm Sal Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC If required, enter the temperature of the first buffer solution, while keeping the <RUN/ENTER> key depressed, using <...
  • Page 26 Operation handylab multi 12 Thoroughly rinse the electrode with distilled water. If required, enter the temperature of the first buffer solution, while keeping the <RUN/ENTER> key depressed, using < > < > . Immerse the pH electrode in the second buffer solution.
  • Page 27 12 Operation mg/l mbar Time Baud ° Day.Month ° Year Ident Tref20 Auto Tref25 AutoCal DIN Store LoBat ARng Lin Cal AutoCal TEC Switch to the measuring mode with <M>.

  • Page 28: Dissolved Oxygen

    Operation handylab multi 12 Dissolved oxygen 4.3.1 General information You can measure the following variables: l D. O. concentration l D. O. saturation The measuring instrument is supplied with the following functions: l AutoRange (automatic switchover of the measurement range), l The AutoRead function (drift control) for checking the stability of the measurement signal.

  • Page 29: Measuring The D. O. Concentration

    12 Operation 4.3.2 Measuring the D. O. concentration When measuring the concentration of test samples with a salt content of more than 1 g/l, a salinity correction is required. Note How to enter the current salt content is described in section 4.3.6 S on page 35.

  • Page 30: Measuring The D. O. Saturation

    Operation handylab multi 12 TDS UpH mV/pH mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store LoBat ARng AutoCal TEC While pressing the <RUN/ENTER> key, switch off the salt con- tent correction with <...

  • Page 31: Autoread Ar (Drift Control)

    12 Operation 4.3.4 AutoRead AR (Drift control) The AutoRead function (drift control) checks the stability of the mea- surement signal. The stability has a considerable impact on the repro- ducibility of the measured values. Call up the measuring mode with <M> and/or <...

  • Page 32: Calibration

    Operation handylab multi 12 4.3.5 D. O. calibration Why calibrate? D. O. probes age. This changes the slope of the D. O. probe. Calibra- tion determines the current slope of the probe and stores this value in the instrument. l After connecting another D. O. probe...
  • Page 33 12 Operation Probe evaluation After the calibration, the measuring instrument evaluates the current status of the probe against the relative slope. The evaluation appears on the display. The relative slope has no effect on the measuring accu- racy. Low values indicate that the electrolyte will soon be depleted and the probe will have to be regenerated.
  • Page 34 Operation handylab multi 12 TDS UpH mV/pH mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Press the <RUN/ENTER> key. AutoRead is active, AR flashes. TDS UpH mV/pH mg/l...

  • Page 35: Salt Content Correction

    (range 0.0 - 70.0) and to switch on the salinity correction. Note With the handylab multi 12 handheld meter, you can measure the sa- linity. How to proceed is described in section 4.4.3 M EASURING THE SA on page 38.

  • Page 36: Conductivity

    Operation handylab multi 12 Conductivity 4.4.1 General information Caution When connecting an earthed PC/printer, measurements cannot be per- formed in earthed media as incorrect values would result. The RS232 interface is not galvanically isolated. Preparatory activities Perform the following preparatory activities when you want to measure: Connect a conductivity measuring cell to the measuring instru- ment.
  • Page 37 12 Operation Checking the Press the <RCL> key repeatedly until CAL disp appears on the cell constant display. mV/pH % mg/l mbar Baud Time ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Press the <RUN/ENTER>...

  • Page 38: Measuring The Conductivity

    Operation handylab multi 12 4.4.2 Measuring the conductivity You can carry out the conductivity measurements as follows: Perform the preparatory activities according to section 4.4.1 page 36. Immerse the conductivity measuring cell in the test sample. Press the < > <...

  • Page 39: Autoread Ar (Drift Control)

    12 Operation 4.4.4 AutoRead AR (Drift control) The AutoRead function (drift control) checks the stability of the mea- surement signal. The stability has a considerable effect on the repro- ducibility of the measured value. Call up the or SAL measuring mode with <M> and/or <...

  • Page 40: Determining The Cell Constant (Calibration In The Control Standard)

    Operation handylab multi 12 4.4.5 Determining the cell constant (Calibration in the control standard) Why determine the cell Aging slightly changes the cell constant, e. g. by coatings. As a result, constant? an inexact measured value is displayed. The original characteristics of the cell can often be restored by cleaning the cell.
  • Page 41 12 Operation Calibration evaluation After the calibration, the measuring instrument automatically evaluates the current status of the calibration. The evaluation appears on the dis- play. Display Cell constant [cm 0.450 ... 0.500 cm Outside the range 0.450 ... 0.500 cm...
  • Page 42 Operation handylab multi 12 mV/pH % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref20 AutoCal DIN Auto Store Tref25 LoBat ARng AutoCal TEC To return to the measuring mode: Press the <M> key. The de- termined cell constant is taken over for the measurement.

  • Page 43: Calibration Intervals (Int 3, Int 4, Int 5)

    12 Operation Calibration intervals (Int 3, Int 4, Int 5) For each measured variable, a time interval is stored. When it has ex- pired, you will be reminded to calibrate. After a calibration interval has expired, the probe symbol of the relevant measured variable flashes. It is still possible to measure.

  • Page 44: Saving Data

    Operation handylab multi 12 Saving data The handylab multi 12 portable measuring instrument has an internal data memory. It can store up to 500 datasets. A complete data record consists of: l Number of the storage location l Date/time l Measured values of the probes connected...
  • Page 45 12 Operation mV/pH % mg/l mbar 1/ cm Sal Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store LoBat ARng Lin Cal AutoCal TEC Using < > < > , enter the required ID number (1 ...

  • Page 46: Switching On Autostore (Int 1)

    Operation handylab multi 12 4.6.2 Switching on AutoStore (Int 1) The save interval (Int 1) determines the chronological interval between automatic save processes. After the fixed interval has expired, the cur- rent data record is transmitted to the internal storage and to the inter- face.
  • Page 47 12 Operation mV/pH % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Set the required ID number with < > < > . Confirm with <RUN/ENTER>.

  • Page 48: Outputting The Data Storage

    Operation handylab multi 12 4.6.3 Outputting the data storage You can output the contents of the data storage: l Stored data on the display l Calibration data on the display l Stored data on the serial interface l Calibration protocol to the interface Outputting stored data Press the <RCL>...
  • Page 49 12 Operation Note If you want to search for a certain element of the data record (e.g. date), proceed as follows: Using <RUN/ENTER>, select the element (e.g. date). Press < > or < > repeatedly until the required element ap- pears on the display.
  • Page 50 Operation handylab multi 12 Sample printout: 09.03.01 17:10 pH 10.01 °C Tauto Ident : 09.03.01 17:12 305 mV Tauto Ident : 09.03.01 17:24 7.88 mg/l 17.6° Tauto Ident : 09.03.01 17:46 7.11 mg/l 17.8° Tauto SAL = 17.9 Ident : 10.03.01...
  • Page 51 12 Operation Press the <RUN/ENTER> key. The data of the last calibration of all measured variables ap- pears in the following sequence: l pH: Slope SLO and asymmetry ASY l Dissolved oxygen: Relative slope SLO l Cond: Cell constant C Information concerning the calibration procedure is output as well.
  • Page 52 Operation handylab multi 12 Press <RUN/ENTER> to display the cell constant. The dis- played value is: l the current, calibrated cell constant (with sensor symbol on the display) or l the fixed cell constant 0.475 1/cm (without probe symbol on the display).
  • Page 53 12 Operation Outputting the calibra- Press the <RCL> key repeatedly until CAL SEr appears on the tion protocol on the display. interface mV/pH % mg/l C A L mbar Time Baud ° Day.Month No. ° Year Ident Tref25...

  • Page 54: Clearing The Memory

    Operation handylab multi 12 4.6.4 Clearing the memory With this function, you can delete the stored data records. 500 storage locations will then be available again. Note The Clear memory function only appears when there are data records stored in the memory. Otherwise, the measuring instrument automati- cally switches to the last active measuring mode.

  • Page 55: Transmitting Data

    12 Operation Transmitting data You have the following possibilities of transmitting data: l One of the following options: – With the AutoStore function (page 46), measured values are periodically saved internally (save interval Int 1) and output on the interface.
  • Page 56 Operation handylab multi 12 Confirm with <RUN/ENTER>. The measuring instrument switches to the last active measur- ing mode. Note When the AutoStore function is active at the same time, the data trans- mission is performed according to the setting of the save interval (Int 1).

  • Page 57: Pc/External Printer (Rs232 Interface)

    12 Operation 4.7.2 PC/external printer (RS232 interface) Via the RS 232 interface, you can transmit the data to a PC or an ex- ternal printer. Use the Z 395 (PC) or Z 391 (ext. printer) cable. Warning The RS232 interface is not galvanically isolated.

  • Page 58: Configuration

    Operation handylab multi 12 Configuration You can adapt the handheld meter to your individual requirements. To do this, the following parameters can be changed (the status on deliv- ery is marked in bold): Baud rate 1200, 2400, 4800, 9600 Air pressure display...
  • Page 59 12 Operation mV/pH % mg/l C A L mbar Time Baud ° Day.Month No. ° Year Ident Tref20 Auto Store Tref25 AutoCal DIN LoBat ARng AutoCal TEC Select the required display during the pH calibration with < > <...
  • Page 60 Operation handylab multi 12 Confirm with <RUN/ENTER>. Int 4 and the measured variable appear on the display. Dissolved oxygen TDS UpH calibration interval mV/pH mg/l mbar 1/ cm Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN...
  • Page 61 12 Operation Using < > < > , toggle between t20 and t25. Confirm with <RUN/ENTER>. The date flashes on the display. Date and time mV/pH % mg/l D i s mbar Baud Time 0 9 0 °...

  • Page 62: Reset

    Operation handylab multi 12 Reset You can reset (initialize) the measurement parameters and the config- uration parameters separately from one another. Measurement The following measuring parameters (pH/O /Cond InI) can be reset to parameters the default condition: Measuring mode Asymmetry...
  • Page 63 12 Operation Resetting the Press the <RUN/ENTER> key and hold it down. measuring parameters Press the <CAL> key. The setting to reset the pH measuring parameters appears on the display. mV/pH % mg/l mbar Baud Time ° Day.Month No.
  • Page 64 Operation handylab multi 12 mV/pH % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Using < > < > , switch between no and YES. YES: Resetting the Conductivity measuring parameters.

  • Page 65: Maintenance, Cleaning, Disposal

    12 Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The measuring instrument is almost maintenance-free. The only maintenance task is replacing the batteries. LoBat indicates that the batteries should be changed. The batteries are then largely de- pleted. Replacing the batteries Open the housing after the instrument has been switched off: –...

  • Page 66: Cleaning

    Maintenance, cleaning, disposal handylab multi 12 Note For maintenance of electrodes, probes and measuring cells refer to the relevant operating manuals. Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as re- quired.

  • Page 67: What To Do If

    12 What to do if... What to do if... pH system messages Error message 0FL Cause Remedy pH electrode: – Not connected – Connect electrode – Air bubble in front of the – Remove air bubble diaphragm – Air in the diaphragm –...
  • Page 68 What to do if... handylab multi 12 Buffer solutions – 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...

  • Page 69: Oxi System Messages

    12 What to do if... Oxi system messages Error message 0FL Cause Remedy Display range exceeded Oxygen sensor – Not connected – Connect the probe – Cable broken – Replace probe – Depleted – Replace probe – Short-circuit between gold and –...

  • Page 70: Conductivity System Messages

    What to do if... handylab multi 12 Measured value too low Cause Remedy – Insufficient flow – Provide flow to the probe Measured value too Cause Remedy high – High amount of dissolved – Correct solubility function substances using the salinity equivalent –...

  • Page 71: General Errors

    12 What to do if... General errors Display LoBat Cause Remedy – Batteries almost empty – Exchange the batteries (see section 5.1 M AINTENANCE Instrument does not Cause Remedy react – Operating condition undefined – Processor reset: to keystroke or EMC load unallowed Hold the <CAL>...
  • Page 72 What to do if... handylab multi 12...

  • Page 73: Lists

    Multi 340i Lists Lists This chapter provides additional information and orientation aids. Abbreviations The list of abbreviations explains the indicators and the abbreviations that appear on the display and in the manual. Specialist terms The glossary briefly explains the meaning of the specialist terms. How- ever, terms that should already be familiar to the target group are not described here.
  • Page 74 °C Temperature unit, degrees Celsius Calibration Ct... Display indicator during calibration for pH mea- surements. Indicates the selection of the buffer data records for SCHOTT technical buffer solu- tions Error message see chapter 6 W HAT TO DO IF Initialization...
  • Page 75 Multi 340i Lists Temperature measurement active (temperature probe) 25/T25 Reference temperature of 25 °C Asymmetry...
  • Page 76 Lists Multi 340i Glossary Adjusting To manipulate a measuring system so that the relevant value (e. g. the displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains with- in the tolerance.
  • Page 77 Multi 340i Lists Measuring system The measuring system comprises all the devices used for measuring, e. g. measuring instrument and probe. In addition, there is the cable and possibly an amplifier, terminal strip and armature. Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol- vent.
  • Page 78 Lists Multi 340i Salt content General designation for the quantity of salt dissolved in water. Sample Designation of the sample ready to be measured. Normally, a test sample is made by processing the original sample. The test sample and original sample are identical if the test sample was not processed. Setting the Name of a function that considers the temperature influence on the temperature...
  • Page 79 12 Index Index pH value Plug-in power supply Air pressure display Energy saving feature Precautions 69, 70 Asymmetry Error messages Authorized use 22, 24 AutoCal TEC AutoRange (oxygen) Reference temperature Initial commissioning AutoRead (conductivity) Initialization Conductivity Remote control Interval D.
  • Page 80 Index handylab multi 12...

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