SI Analytics handylab pH LF 12 Operating Manual
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SI Analytics handylab pH LF 12 Operating Manual

Ph/conductivity measuring instrument
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Operating manual
handylab pH/LF 12
pH/Conductivity measuring instrument
ba75370e01
12/2002

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Summary of Contents for SI Analytics handylab pH LF 12

  • Page 1 Operating manual handylab pH/LF 12 pH/Conductivity measuring instrument ba75370e01 12/2002...
  • Page 2 Accuracy when The use of advanced technology and the high quality standard of our going to press 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.

  • Page 3: Table Of Contents

    handylab pH/LF 12 Contents Overview ........5 General features .
  • Page 4 Contents handylab pH/LF 12 Reset ........64 Maintenance, cleaning, disposal .

  • Page 5: Overview

    handylab pH/LF 12 Overview Overview General features This compact precision handheld meter enables you to carry out pH / ORP measurements and conductivity measurements rapidly and reli- ably. The handheld meter provides the maximum degree of operating com- fort, reliability and measuring certainty for all applications. ®...

  • Page 6: Keypad

    Overview handylab pH/LF 12 Keypad RUN/ENTER Key functions Select the measured variable <M>: – pH value / ORP voltage – Conductivity / salinity Save a measured value <STO> Switch measuring instrument on/off <ON/OFF> Calibrate the currently set measured variable <CAL> Display/transmit measured values <RCL>...

  • Page 7: Display

    handylab pH/LF 12 Overview Display Status display Probe symbol mV/pH mg/l Meas. value display mbar M cm 1/ cm Time Baud Function and ° Day.Month No. ° Year Ident temperature display Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Jack field Conductivity measuring cell pH electrode...

  • Page 8: Operating Structure

    Overview handylab pH/LF 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 connecting a conductivity measuring cell with temperature probe, the measuring instrument recognizes the probe and automati- cally switches to the last selected conductivity measuring mode.

  • Page 9: Technical Data

    handylab pH/LF 12 Overview Technical data Dimensions Length [mm] and weight Width [mm] Height [mm] Weight [kg] approx. 0.3 Mechanical Type of protection IP 66 structure Electrical Protective class safety Test certificates GS, cETLus, CE Ambient Storage - 25 °C ... + 65 °C conditions Operation -10 °C ...
  • Page 10 Overview handylab pH/LF 12 Measuring ranges of Measuring range Resolution conductivity [µS/cm] 0 ... 1999 [mS/cm] 0.00 ... 19.99 0.01 0.0 ... 199.9 0 ... 500 0.0 ... 70.0 accord- ing to the IOT table − 5.0 ... + 105.0 T [°C] Precision of Nonlinear compensation...
  • Page 11 handylab pH/LF 12 Overview Serial Automatic switchover if a PC or printer is connected. interface Type RS232, data output Baud rate Selectable 1200, 2400, 4800, 9600 baud Data bits Stop bit Parity None Handshake RTS/CTS + Xon/Xoff Cable length Max. 15 m Power Batteries 4 x 1.5 V alkali-manganese batteries, Type...

  • Page 12: Handylab Ph/Lf

    Overview handylab pH/LF 12 Applicable EEC guideline 89/336/EEC 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 EG guideline 73/23/EEC EN 61010-1 A2:1995 Climatic class VDI/VDE 3540 Type of protection EN 60529:1991...

  • Page 13: Safety

    handylab pH/LF 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 before working with the measuring system. The op- erating manual must always be available within the vicinity of the mea- suring system.

  • Page 14: General Safety Instructions

    Safety handylab pH/LF 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. Function and operating The smooth functioning and operational safety of the measuring instru- safety...

  • Page 15: Commissioning

    handylab pH/LF 12 Commissioning Commissioning Scope of delivery l handylab pH/LF 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 l Connect the plug-in power supply (optional) Setting the date and Press the <M>...
  • Page 16 Commissioning handylab pH/LF 12 Connecting the original You can either operate the measuring instrument with batteries or with plug-in power supply the plug-in power supply. The plug-in power supply supplies the mea- unit suring instrument with low voltage (12 VDC). This saves the batteries. Warning The line voltage at the operating site must lie within the input voltage range of the original plug-in power supply (see section 1.6 T...

  • Page 17: Operation

    handylab pH/LF 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 switching on No sensor or pH/ORP electrode pH or ORP measurement (de-...

  • Page 18: Ph Value / Orp Voltage

    Operation handylab pH/LF 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 handylab pH/LF 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 a conductivity measur- ments ing cell. The measuring instrument recognizes which sensors are con- nected and automatically switches to the correct mode for the temperature measurement.

  • Page 20: Measuring The Ph Value

    Operation handylab pH/LF 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. mV/pH % mg/l mbar...
  • Page 21 handylab pH/LF 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. Note The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>.

  • Page 22: Measuring The Orp Voltage

    Operation handylab pH/LF 12 4.2.3 Measuring the ORP voltage In conjunction with an ORP electrode, e.g. BlueLine 31Rx, the measur- ing instrument can measure the ORP voltage (mV) of a solution. Perform the preparatory activities according to section 4.2.1. Submerse the ORP electrode in the sample. Press the <...

  • Page 23: Ph Calibration

    handylab pH/LF 12 Operation pH calibration Why calibrate? pH electrodes age. This changes the asymmetry (zero point) and slope of the pH electrode. As a result, an inexact measured value is dis- played. Calibration determines the current values of the asymmetry and slope of the electrode and stores them in the measuring instru- ment.
  • Page 24 Operation handylab pH/LF 12 Note You can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface according to section 4.7.2 before calibrating. After a valid calibration, the record is printed. Sample printout: CALIBRATION PROTOCOL 02.03.01 14:19...

  • Page 25: Autocal Tec

    handylab pH/LF 12 Operation Preparatory activities 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. Keep the buffer solutions ready. Adjust the temperature of the solution and measure the current temperature if the measurement is made without the use of a temperature probe (the TP display indicator is missing from the...
  • Page 26 Operation handylab pH/LF 12 % mg/l mbar 1/ cm Sal Baud Time ° 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 with < >...
  • Page 27 handylab pH/LF 12 Operation strument uses the Nernst slope (-59,2 mV/pH at 25 °C) and determines the asymmetry of the electrode. Thoroughly rinse the electrode with deionized water. If required, enter the temperature of the second buffer solution with < >...
  • Page 28 Operation handylab pH/LF 12 mg/l mbar Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store LoBat ARng Lin Cal AutoCal TEC Switch to the measuring mode with <M>.

  • Page 29: Autocal Din

    handylab pH/LF 12 Operation 4.3.2 AutoCal DIN For this procedure, use two different standard buffer solutions accord- ing to DIN 19266 (type A, C, D or F with pH values at 25 °C of: 1.679 / 4.006 / 6.865 / 9.180). Note Skip the steps 2 and 7 if you use a pH electrode with a temperature probe or the temperature probe of a conductivity measuring cell.
  • Page 30 Operation handylab pH/LF 12 When the measured value is stable, Cd2 appears. % mg/l mbar 1/ cm Sal Time Baud ° Day.Month No. ° Year Ident Tref20 Auto Store Tref25 AutoCal DIN LoBat ARng AutoCal TEC Note At this point, the AutoCal DIN calibration can be terminated with <M>. This corresponds to a single-point calibration.
  • Page 31 handylab pH/LF 12 Operation When the measured value is stable, AR disappears. The value of the slope (mV/pH) appears on the display. The probe symbol shows the evaluation of the current calibration. mV/pH mg/l mbar Time Baud ° Day.Month ° Year Ident Tref25...

  • Page 32: Concal

    Operation handylab pH/LF 12 4.3.3 ConCal Two-point calibration For this procedure, use two buffer solutions: l pH 7.0 ± 0.5 l any other buffer solution Note Skip the steps 2 and 9 if you use a pH electrode with a temperature probe or the temperature probe of a conductivity measuring cell.
  • Page 33 handylab pH/LF 12 Operation mV/pH % mg/l mbar 1/ cm Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Thoroughly rinse the electrode with deionized water. If required, enter the temperature of the second buffer solution with <...
  • Page 34 Operation handylab pH/LF 12 mg/l mbar Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Switch to the measuring mode with <M>.

  • Page 35: Conductivity/Salinity

    handylab pH/LF 12 Operation Conductivity/Salinity 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 36 Operation handylab pH/LF 12 Checking the cell con- Press the <RCL> key repeatedly until CAL disp appears on the stant display. 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>...

  • Page 37: Measuring The Conductivity

    handylab pH/LF 12 Operation 4.4.2 Measuring the conductivity You can meaure the conductivity as follows: Perform the preparatory activities according to section 4.4.1. Immerse the conductivity measuring cell in the test sample. and the unit µ S/cm appears Press the < >...

  • Page 38: Autoread Ar (Drift Control)

    Operation handylab pH/LF 12 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. Select the or SAL measuring mode with <M> and/or < >...

  • Page 39: Determining The Cell Constant (Calibration In The Control Standard)

    handylab pH/LF 12 Operation 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 40 Operation handylab pH/LF 12 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 Eliminate the error according to chapter 6 W HAT TO DO IF...
  • Page 41 handylab pH/LF 12 Operation mV/pH % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC To return to the measuring mode: Press the <M> key. The de- termined cell constant is taken over for the measurement. Note If the error message E3 E3 appears, refer to chapter 6 W...

  • Page 42: Setting The Temperature Compensation

    Operation handylab pH/LF 12 4.4.6 Setting the temperature compensation The calculation of the temperature compensation is based on the pre- set reference temperature, Tref 20 or Tref 25 (see section 4.8 C ONFIGURATION You can select one of the following temperature compensations: l Nonlinear temperature compensation (nLF) according to EN 27 888 l Linear temperature compensation (Lin) with adjustable coeffi-...
  • Page 43 handylab pH/LF 12 Operation Selecting the nonlinear You can select the nonlinear temperature compensation as follows: temperature compensa- tion Press the <CAL> key repeatedly until the status displays and tC appear. mV/pH % mg/l mbar Time Baud ° Day.Month No. °...
  • Page 44 Operation handylab pH/LF 12 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. Press the <CAL> key repeatedly until the adjustable linear temperature coefficient (%/K) appears on the display. mV/pH % mg/l mbar...
  • Page 45 handylab pH/LF 12 Operation Switching the tempera- You can switch off the temperature compensation as follows: ture compensation off Press the <CAL> key repeatedly until tc appears on the dis- play. mV/pH % mg/l mbar Time Baud ° Day.Month No. °...

  • Page 46: Calibration Intervals (Int 3, Int 5)

    Operation handylab pH/LF 12 Calibration intervals (Int 3, 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 47: Saving

    handylab pH/LF 12 Operation Saving The measuring instrument has an internal data memory. It can store up to 500 data records. A complete data record consists of: l Number of the storage location l Date/time l Measured values of the probes connected l Temperature l Temperature measuring procedure l ID number...
  • Page 48 Operation handylab pH/LF 12 mV/pH mg/l mbar 1/ cm Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Using < > < > , set the required ID number (1 ... 999). Confirm with <RUN/ENTER>.

  • Page 49: Switching On Autostore (Int 1)

    handylab pH/LF 12 Operation 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 50 Operation handylab pH/LF 12 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>. The measuring instrument switches to the last active measur- ing mode and starts the measuring and saving procedure.

  • Page 51: Outputting The Data Storage

    handylab pH/LF 12 Operation 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 52 Operation handylab pH/LF 12 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 53 handylab pH/LF 12 Operation Sample printout: 09.03.99 17:10 pH 10.01 °C Tman Ident : 09.03.99 17:11 pH 10.01 24.7 °C Tauto Ident : 09.03.99 17:12 305.2 mV Tauto Ident : Outputting the Press the <RCL> key repeatedly until CAL disp appears on the calibration data display.
  • Page 54 Operation handylab pH/LF 12 mV/pH mg/l mbar Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Press <RUN/ENTER> to display the value of the asymmetry (mV). mg/l mbar Time Baud ° Day.Month °...
  • Page 55 handylab pH/LF 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 Tref20 AutoCal DIN Auto...

  • Page 56: Clearing The Memory

    Operation handylab pH/LF 12 4.6.4 Clearing the memory With this function, you can delete stored data records. 500 storage lo- cations 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 57: Transmitting Data

    handylab pH/LF 12 Operation Transmitting data You have the following possibilities of transmitting data: l One of the following options: – With the AutoStore function (page 49), measured values are periodically saved internally (save interval Int 1) and output on the interface.

  • Page 58: Pc/External Printer (Rs232 Interface)

    Operation handylab pH/LF 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). Set the save interval (Int 1) to OFF to activate the Data transmission in- terval (Int 2).

  • Page 59: Remote Control

    handylab pH/LF 12 Operation 4.7.3 Remote control The handheld meter can be remotely controlled from a PC. This re- quires a communication kit (communication cable + communication program) which is available upon request. The instrument is then con- trolled via commands that simulate keystrokes and request the current display contents.

  • Page 60: Configuration

    Operation handylab pH/LF 12 Configuration You can adapt the measuring instrument to your individual require- ments. To do this, the following parameters can be changed (the status on delivery is marked in bold): Baud rate 1200, 2400, 4800, 9600 Display during the Buffer nominal value, or current pH calibration electrode voltage...
  • Page 61 handylab pH/LF 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 62 Operation handylab pH/LF 12 Confirm with <RUN/ENTER>. The reference temperature set for conductivity measurements appears on the display. Switching over the TDS UpH mV/pH reference temperature % mg/l mbar M cm Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto...
  • Page 63 handylab pH/LF 12 Operation Confirm with <RUN/ENTER>. The minutes flash on the display. Set the current time with < > < > . Confirm with <RUN/ENTER>. The measuring instrument switches to the last active measur- ing mode.

  • Page 64: Reset

    Operation handylab pH/LF 12 Reset You can reset (initialize) the measurement parameters and the config- uration parameters separately from one another. Measurement The following measuring parameters are reset to the delivery status: parameters Measuring mode Slope -59.16 mV/pH Asymmetry 0 mV Manual temperature input 25 °C Conductivity...
  • Page 65 handylab pH/LF 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 66 Operation handylab pH/LF 12 Resetting the configuration parame- mV/pH ters % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Using < > < > , toggle between no and YES. YES: Resetting the configuration parameters no: Retaining settings.

  • Page 67: Maintenance, Cleaning, Disposal

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

  • Page 68: Cleaning

    Maintenance, cleaning, disposal handylab pH/LF 12 Note For maintenance of electrodes and measuring cells, follow the corre- sponding operating manual. Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as re- quired.

  • Page 69: What To Do If

    handylab pH/LF 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 70 What to do if... handylab pH/LF 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 Cause Remedy value...

  • Page 71: Conductivity System Messages

    handylab pH/LF 12 What to do if... Conductivity system messages Error message OFL Cause Remedy The measured value lies outside the measuring range – Measuring cell not connected – Connect measuring cell – Cable broken – Replace measuring cell Error message E3 Cause Remedy –...
  • Page 72 What to do if... handylab pH/LF 12 Message StoFull StoFull StoFull StoFull Cause Remedy – All memory locations are full – Output data storage and clear data storage...

  • Page 73: Lists

    handylab pH/LF 12 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 Lists handylab pH/LF 12 Abbreviations Conductivity value (international γ ) AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest reso- lution Asymmetry AutoCal DIN Automatic pH calibration with buffer solutions pre- pared according to DIN 19 266 AutoCal TEC Automatic pH calibration with SCHOTT technical buffer solutions according to DIN 19267...
  • Page 75 handylab pH/LF 12 Lists SELV Safety Extra Low Voltage Slope setting on calibration Temperature coefficient (internat. α ) Temperature measurement active (Temperature Probe) 20/T20 Reference temperature of 20 °C 25/T25 Reference temperature of 25 °C Asymmetry...
  • Page 76 Lists handylab pH/LF 12 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 handylab pH/LF 12 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 handylab pH/LF 12 Temperature Value of the slope of a linear temperature function. coefficient Temperature Name of a function that considers the temperature influence on the compensation measurement and converts it accordingly. Depending on the mea- sured parameter to be determined, the temperature compensation functions in different ways.
  • Page 79 handylab pH/LF 12 Index Index Asymmetry Keys Safety Authorized use safety precautions 23, 29 AutoCal DIN Salinity 23, 25 AutoCal TEC Save interval Linear 20, 38 AutoRead Scope of delivery Temperature compensa- Setting the baud rate tion 15, 62 Setting the date temperature compensa- Setting the reference temper- 24, 40...
  • Page 80 Index handylab pH/LF 12...

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