wtw pH/ION 340i Operating Manual
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wtw pH/ION 340i Operating Manual

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Operating manual
pH/ION 340i
pH/Ion meter
ba52316e02
03/2004

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Summary of Contents for wtw pH/ION 340i

  • Page 1 Operating manual pH/ION 340i pH/Ion meter ba52316e02 03/2004...
  • Page 2 © Copyright Weilheim 2004, WTW GmbH Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim. Printed in Germany.

  • Page 3: Table Of Contents

    340i Contents Overview ........5 General features .
  • Page 4 Contents pH/ION 340i Cleaning ........64 Disposal .

  • Page 5: Overview

    Note If you need further information or application notes, you can obtain the following material from WTW: l Application reports l Primers l Safety datasheets. You will find information on available literature in the WTW catalog or via the Internet.

  • Page 6: Sets Of Equipment

    Overview pH/ION 340i SETs of equipment The measuring instrument is also available as part of individual SETs of equipment. You will find additional information on this and other accessories in the WTW catalog or via the Internet.
  • Page 7 340i Overview Set (sample configuration): pH/ION 340i measuring instrument Stand Measuring beaker,50 ml 50 ml pH buffer solution, STP 4 50 ml pH buffer solution, STP 7 Storing solution for pH electrodes pH combination electrode Plug-in power supply (optional)

  • Page 8: Keypad

    Overview pH/ION 340i Keypad RUN/ENTER Key functions Select the measured variable <M>: – pH value / ORP voltage – Ion concentration 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 9: Display

    340i Overview Display Status display Probe symbol mol/L mV/pH % ppm Meas. value display mg/l °F Time Baud Day.Month No. Function and °C Year Ident temperature display CalError TempError AutoCal DIN Auto Store LoBat ARng AR AutoCal TEC ConCal...

  • Page 10: Operating Structure

    Overview pH/ION 340i 1.6 Operating structure The following overview diagram shows which keys you have to press to select between the different measuring modes:...

  • Page 11: Safety

    340i 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 12: General Safety Instructions

    Safety pH/ION 340i General safety instructions This instrument is built and inspected according to the relevant guide- lines and norms for electronic measuring instruments (see chapter ECHNICAL DATA It left the factory in a safe and secure technical condition. Function and operating...

  • Page 13: Commissioning

    340i Commissioning Commissioning Scope of delivery l 340i handheld meter l Plug-in power supply (optional) l Operating manual and short operating manual l 4 batteries, 1.5 V Mignon type AA (in the instrument) For details of scope of delivery of SETs, see chapter 1.2 SET S OF and WTW catalog.
  • Page 14 Use original plug-in power supplies only (see chapter 7 T ECHNICAL DATA R e f Plug the jack (1) into the socket (2) of the measuring instru- ment. Connect the original WTW plug-in power supply (3) to an easily accessible mains socket.

  • Page 15: Operation

    340i 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. Note The measuring instrument has an energy saving feature to avoid un- necessary battery depletion.

  • Page 16: Ph Value / Orp Voltage

    Operation pH/ION 340i 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 17: Measuring The Ph Value

    340i Operation 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. If required, enter the temperature of the test sample with < > < > while keeping the <RUN/ENTER> key depressed.
  • Page 18 Operation pH/ION 340i 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 19: Measuring The Orp Voltage

    340i Operation 4.2.3 Measuring the ORP voltage In conjunction with an ORP electrode, e.g. SenTix ORP, the measuring 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.

  • Page 20: Ph Calibration

    You can select one of 3 calibration procedures: AutoCal TEC is specially matched to the WTW technical buffer solutions as a fully au- tomatic two-point calibration. The buffer solutions are automatically recognized by the measuring instrument. Depending on the instrument setting (see section 4.8 C...
  • Page 21 340i Operation 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...

  • Page 22: Autocal Tec

    25 °C: 2.00 / 4.01 / 7.00 / 10.01). Note The calibration for pH 10.01 is optimized for the WTW technical buffer solution TEP 10 Trace or TPL 10 Trace. Other buffer solutions can lead to an erroneous calibration. The correct buffer solutions are given in the WTW catalog or in the Internet.
  • Page 23 340i 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 with < > < > while keeping the <RUN/ENTER> key depressed.
  • Page 24 Operation pH/ION 340i strument uses the Nernst slope (-59,16 mV/pH at 25 °C) and deter- mines the asymmetry of the electrode. Thoroughly rinse the electrode with deionized water. If required, enter the temperature of the second buffer solution with < > < > while keeping the <RUN/ENTER> key de- pressed.
  • Page 25 340i Operation mol/L mV/pH % ppm mg/L °F Time Baud Day.Month No. °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal Switch to the measuring mode with <M>.

  • Page 26: Autocal Din

    Operation pH/ION 340i 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).
  • Page 27 340i Operation When the measured value is stable, Cd2 appears. mol/L mV/pH % ppm mg/L °F Time Baud Day.Month No. °C Year Ident CalError TempError Auto Store AutoCal DIN LoBat ARng AR AutoCal TEC ConCal Note At this point, the AutoCal DIN calibration can be terminated with <M>.
  • Page 28 Operation pH/ION 340i 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. mol/L mV/pH % ppm mg/L °F Baud Time Day.Month No.

  • Page 29: Concal

    340i Operation 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 8 if you use a pH electrode with a temperature sensor.
  • Page 30 Operation pH/ION 340i mol/L mV/pH % ppm mg/L °F Time Baud Day.Month No. °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AR AutoCal TEC ConCal Thoroughly rinse the electrode with deionized water. If required, enter the temperature of the second buffer solution with <...
  • Page 31 340i Operation mol/L mV/pH % ppm mg/L °F Time Baud Day.Month No. °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal Switch to the measuring mode with <M>.

  • Page 32: Ion Concentration

    Operation pH/ION 340i Ion concentration 4.4.1 General information Preparatory activities Perform the following preparatory activities when you want to measure the concentration using an ion selective electrode: Connect the ion selective electrode and the reference elec- trode to the measuring instrument.

  • Page 33: Measuring The Ion Concentration

    340i Operation The temperature measurement is absolutely essential for a reproduc- ible ISE measurement. If the measurement is made without a temper- ature sensor, proceed as follows: Measure the current temperature using a thermometer. Bring the test sample and calibration standards to the same temperature (±...

  • Page 34: Calibration For Ion Selective Measurements

    Operation pH/ION 340i Activate the AutoRead function with <AR>. The current measured value is frozen (hold function). 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>.
  • Page 35 340i Operation TP display If you use a temperature sensor, a flashing TP display indicates that the difference in temperature of the standard solutions is too high (more than 2 °C). Displaying the You can view the data of the last calibration on the display. The pro- calibration data ceeding is described on page 48.
  • Page 36 Operation pH/ION 340i Preparatory activities Perform the following preparatory activities: Connect the ion selective electrode and the reference elec- trode to the measuring instrument. Connect a temperature sensor (sockets 2 and 4, see section 1.5 J on page 9. ACK FIELD If necessary, press the <M>...
  • Page 37 340i Operation Two-point calibration Press the <CAL> key. The previously set up concentration of the first standard solution and ConCal appear on the display. mol/L mV/pH % ppm mg/l °F Time Baud Day.Month No. °C Year Ident TempError CalError...
  • Page 38 Operation pH/ION 340i mol/L mV/pH % ppm mg/l °F Baud Time Day.Month No. °C Year Ident CalError TempError Auto Store AutoCal DIN LoBat ARng AR AutoCal TEC ConCal Enter the current concentration of the second standard solution with < > < >.
  • Page 39 340i Operation mol/L % ppm mg/L °F Time Baud Day.Month No. °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal To return to the measuring mode: Press the <M> key or go on to the three-point calibration by pressing the <RUN/ENTER>...
  • Page 40 Operation pH/ION 340i mol/L % ppm mg/L °F Time Baud Day.Month No. °C Year Ident CalError TempError Auto Store AutoCal DIN LoBat ARng AutoCal TEC ConCal As soon as a stable value is reached, the AR display indicator stops flashing. The slope (mV) of the electrode for the measur- ing range II is displayed.

  • Page 41: Calibration Interval (Int 3)

    340i Operation Calibration interval (Int 3) The flashing probe symbol reminds you to calibrate regularly (pH/ ORP). When the fixed calibration interval (Int 3) has expired, the probe symbol flashes. It is still possible to measure. The calibration interval is set to 7 days in the factory.

  • Page 42: Saving

    Operation pH/ION 340i 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 value l Temperature l Temperature measuring procedure...
  • Page 43 340i Operation mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal Using < > < >, set the required ID number (1 ... 999). Confirm with <RUN/ENTER>.

  • Page 44: Switching On Autostore (Int 1)

    Operation pH/ION 340i 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 45 340i Operation mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal 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 46: Outputting The Data Storage

    Operation pH/ION 340i 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 47 340i 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 48 Operation pH/ION 340i Sample printout: 09.03.99 17:10 pH 10.013 °C Tman Ident : 09.03.99 17:11 pH 10.104 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 49 340i Operation mol/L mV/pH % ppm mg/L °F Time Baud Day.Month No. °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal Press <RUN/ENTER> to display the value of the asymmetry (mV). mol/L mV/pH % ppm mg/L °F...
  • Page 50 Operation pH/ION 340i mol/L % ppm mg/L °F Time Baud s L O 2 Day.Month °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal With <M> you can switch back to the last active measuring...
  • Page 51 340i Operation Outputting the calibra- Press the <RCL> key repeatedly until CAL SEr appears on the tion protocol on the display. interface mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C Year Ident CalError TempError AutoCal DIN Auto...

  • Page 52: Clearing The Memory

    Operation pH/ION 340i 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 53: Transmitting Data

    340i Operation Transmitting data You have the following possibilities of transmitting data: l One of the following options: – With the AutoStore function (page 44), measured values are periodically saved internally (save interval Int 1) and output on the interface.

  • Page 54: Pc/External Printer (Rs232 Interface)

    Operation pH/ION 340i 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 55: Remote Control

    340i Operation 4.7.3 Remote control The measuring instrument can be remotely controlled from a PC. This requires the KOM pilot communication kit. It is available as an acces- sory. The instrument is then controlled via commands that simulate keystrokes and request the current display contents.

  • Page 56: Configuration

    Operation pH/ION 340i 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...
  • Page 57 340i Operation mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C Year Ident TempError CalError AutoCal DIN Auto Store LoBat ARng AutoCal TEC ConCal Select the required display during the pH calibration with < > < >. mV: Display of the current electrode voltage /pH: Display of the buffer nominal value.
  • Page 58 Operation pH/ION 340i Set the current month with < > < >. Confirm with <RUN/ENTER>. The year appears on the display. Set the current year with < > < >. Confirm with <RUN/ENTER>. The hours flash on the display. Set the current time with < > < >.

  • Page 59: Reset

    340i Operation 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...
  • Page 60 Operation pH/ION 340i 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. mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C...
  • Page 61 340i Operation Resetting the configuration parame- ters mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C Year Ident CalError TempError Auto AutoCal DIN Store LoBat ARng AutoCal TEC ConCal Using < > < >, toggle between no and YES.
  • Page 62 Operation pH/ION 340i...

  • Page 63: Maintenance, Cleaning, Disposal

    340i 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.

  • Page 64: Cleaning

    Maintenance, cleaning, disposal pH/ION 340i Note For maintenance of electrodes and ion-selective electrodes, follow the corresponding 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 65: What To Do If

    340i 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 66 What to do if... pH/ION 340i 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...

  • Page 67: Ise System Messages

    340i What to do if... ISE system messages Error message 0FL Cause Remedy Ion-selective electrode: – Not connected – Connect the electrode – Cable broken – Replace the electrode Error message E3 Cause Remedy Ion-selective electrode: – Slope not in the range –...

  • Page 68: General Errors

    What to do if... pH/ION 340i TP and Temp Error flash Cause Remedy In calibration: – Calibration standards do not – Temper the calibration have the correct temperature standards ± (max. temperature difference 2 °C) In measurement: – Test sample does not have the –...
  • Page 69 340i What to do if... Display Cause Remedy – Time-out of the interface – Check the instrument that is connected Probe symbol flashes Cause Remedy – Calibration interval expired – Recalibrate the measuring system Message StoFull StoFull StoFull StoFull...
  • Page 70 What to do if... pH/ION 340i...

  • Page 71: Technical Data

    340i Technical data Technical data Dimensions and weight Length [mm] Width [mm] Height [mm] Weight [kg] Approx. 0.3 Mechanical structure Type of protection IP 66 Electrical safety Protective class Ambient conditions Storage - 25 °C ... + 65 °C Operation -10 °C ...
  • Page 72 Technical data pH/ION 340i pH temperature input: - 20 °C ... + 130 °C ISE measuring ranges Measuring range 1 0.000 ... 9.999 mg/l Resolution 0.001 mg/l Measuring range 2 0.00 ... 99.9 mg/l Resolution 0.01 mg/l Measuring range 3 0.0 ...
  • Page 73 340i Technical data Serial Automatic switchover when a PC or a printer is connected via the cable, interface AK 340/B or AK 325/S. Type RS232, data output Baud rate Selectable 1200, 2400, 4800, 9600 baud Data bits Stop bit...
  • Page 74 Technical data pH/ION 340i Guidelines E.C. guideline 89/336/EEC and norms used EN 61326-1:1997 EN 61000-3-2 A14:2000 EN 61000-3-3:1995 FCC Class A Instrument safety E.C. guideline 73/23/EEC EN 61010-1 A2:1995 Climatic class VDI/VDE 3540 Type of protection EN 60529:1991 FCC Class A Equipment Statement...

  • Page 75: Lists

    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 76 Asymmetry AutoCal DIN Automatic pH calibration with buffer solutions pre- pared according to DIN 19 266 AutoCal TEC Automatic pH calibration with WTW technical buff- er solutions according to DIN 19267 °C Temperature unit, degrees Celsius Calibration Cd... Display indicator during calibration for pH mea- surements.
  • Page 77 340i Lists Slope (internat. k) SELV Safety Extra Low Voltage Slope setting on calibration Temperature measurement active (Temperature Probe) Asymmetry...
  • Page 78 AutoRange Name of the automatic selection of the measuring range. AutoRead WTW name for a function to check the stability of the measured value. Calibration Comparing the value from a measuring system (e. g. the displayed value) to the correct value or a value that is regarded as correct. Of- ten, this expression is also used when the measuring system is adjust- ed at the same time (see adjusting).
  • Page 79 340i Lists Offset potential The measurable potential of a symmetrical electrode, the membrane of which is immersed in a solution with the pH of the nominal electrode zero point. The asymmetry is part of the offset potential. ORP voltage...
  • Page 80 Lists pH/ION 340i...
  • Page 81 340i Index Asymmetry ISE calibration ConCal (ISE measure- Auslieferzustand ISE calibration evaluation ment) Authorized use Two-point calibration 20, 26 AutoCal DIN ConCal 20, 22 AutoCal TEC ConCal (ISE measure- Keys AutoRead ment) ISE measurement two-point calibration Two-point calibration (pH)
  • Page 82 Index pH/ION 340i...

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