wtw 2F30-100 Operating Manual
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wtw 2F30-100 Operating Manual

Ph/dissolved oxygen/conductivity measuring instrument
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  • Page 2 © Copyright Weilheim 2004, WTW GmbH Reproduction in whole - or even in part - is prohibited without the ex- press written permission of WTW GmbH, Weilheim. Printed in Germany.

  • Page 3: Table Of Contents

    Multi 340i List of contents Overview ........5 General features .
  • Page 4 List of contents Multi 340i 4.7.2 PC/external printer (RS232 interface) ..55 4.7.3 Remote control ......55 Configuration .

  • 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

    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. Set (sample configuration): Multi 340i meter, carrying strap with 2 carrying clips, armoring...
  • Page 7 Multi 340i Overview 50 ml pH buffer solution, STP 4 50 ml pH buffer solution, STP 7 Calibration and control standard for conductivity measuring cells, 50 ml 50 ml ELY/G electrolyte solution for D.O. probes 50 ml RL/G cleaning solution for D.O. probes WP 90/3 exchange membrane heads for D.

  • Page 8: Keypad

    Overview Multi 340i 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> Calibrate the currently set measured variable <CAL>...

  • Page 9: Display

    Multi 340i 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 10: Operating Structure

    Overview Multi 340i 1.6 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 11: Safety

    Multi 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 carefully before working with the measuring system. The operating manual must always be available within the vicinity of the measuring system.

  • Page 12: General Safety Instructions

    Safety Multi 340i General safety instructions This instrument is built and inspected according to the relevant guide- lines and norms for electronic measuring instruments (see chapter 7 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 13: Commissioning

    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 section 1.2 SET S OF and WTW catalog. EQUIPMENT Initial commissioning Perform the following activities:...
  • Page 14 Warning Use original plug-in power supplies only (see chapter 7 T ECHNICAL DATA 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

    Multi 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. Measuring mode when Connected sensor Measuring mode switching on No sensor or pH/ORP electrode pH or ORP measurement (de- pending on the last selected set-...

  • Page 16: Ph Value / Orp Voltage

    Operation Multi 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 Multi 340i Operation Temperature measure- You can perform pH measurements with or without a temperature sen- ment in pH measure- sor as well as with the temperature sensor 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 18: Measuring The Ph Value

    Operation Multi 340i 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 19: Measuring The Orp Voltage

    Multi 340i 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 20: Ph Calibration

    – after a voltage interruption, e. g. after changing the batteries 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 Multi 340i 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 10.00 184.1 mV 25.0°C 3.0 mV 25.0°C -59.4 mV/pH...
  • Page 22 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 Multi 340i Operation % 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, while keeping the <RUN/ENTER> key depressed, using <▲> <▼>.
  • Page 24 Operation Multi 340i 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. Press the <RUN/ENTER> key. The AR display indicator flashes.
  • Page 25 Multi 340i Operation mg/l mbar Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat Lin Cal AutoCal TEC Switch to the measuring mode with <M>.

  • Page 26: Dissolved Oxygen

    Operation Multi 340i Dissolved oxygen 4.3.1 General information Note D. O. measurements with the Multi 340i can only be carried out using a CellOx 325 or StirrOx G D. O. probe. The stirrer of the StirrOx G D. O. probe has to be supplied with voltage separately using the NT/pH Mix 540 power supply.

  • Page 27: Measuring The D. O. Concentration

    Multi 340i 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 33.

  • Page 28: Measuring The D. O. Saturation

    Operation Multi 340i TDS UpH mV/pH mg/l mbar Baud Time ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC While pressing the <RUN/ENTER> key, switch off the salt con- tent correction with <▼>. The SAL display indicator is no longer displayed.

  • Page 29: Autoread Ar (Drift Control)

    Multi 340i 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 <▲> <▼> . Activate the AutoRead function with <AR>.

  • Page 30: Calibration

    Operation Multi 340i 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 When to calibrate? l When the probe symbol flashes (after the calibration interval has ex- pired).
  • Page 31 Multi 340i 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 32 Operation Multi 340i 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 mbar 1/ cm Time Baud...

  • Page 33: Salt Content Correction

    Multi 340i Operation 4.3.6 Salt content correction A salt content correction is required in the oxygen concentration mea- surement of samples with a salt content of more than 1 g/l. To do this, you have to enter the salinity equivalent of the test sample (range 0.0 - 70.0) and to switch on the salinity correction.

  • Page 34: Conductivity

    Operation Multi 340i Conductivity 4.4.1 General information Note Conductivity measurements with the Multi 340i can only be carried out using the TetraCon 325 measuring cell. Warning 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.
  • Page 35 Multi 340i Operation Checking the Press the <RCL> key repeatedly until CAL disp appears on the cell constant 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 36: Measuring The Conductivity

    Operation Multi 340i 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 34. Immerse the conductivity measuring cell in the test sample. Press the < ▲> <▼> keys until in the status display, and the unit µ...

  • Page 37: Autoread Ar (Drift Control)

    Multi 340i 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 38: Determining The Cell Constant (Calibration In The Control Standard)

    Operation Multi 340i 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 39 Multi 340i 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 Eliminate the error according to chapter 6 W HAT TO DO IF...
  • Page 40 Operation Multi 340i mV/pH % mg/l mbar Baud Time ° 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 E3 E3 E3 E3 If the error message...

  • Page 41: Calibration Intervals (Int 3, Int 4, Int 5)

    Multi 340i 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 42: Saving Data

    Operation Multi 340i Saving data The Multi 340i 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 l Temperature values of the probes connected l Temperature measuring procedure l ID number...
  • Page 43 Multi 340i Operation mV/pH % mg/l mbar 1/ cm Sal Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Lin Cal Using <▲> <▼>, enter the required ID number (1 ... 999). Confirm with <RUN/ENTER>.

  • Page 44: Switching On Autostore (Int 1)

    Operation Multi 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 Multi 340i 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>. The measuring instrument switches to the last active measur- ing mode and start the measuring and saving procedure.

  • Page 46: Outputting The Data Storage

    Operation Multi 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 Multi 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. After approx.
  • Page 48 Operation Multi 340i 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 19:09 2.40 mS/cm 25.3 °C...
  • Page 49 Multi 340i 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 50 Operation Multi 340i 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). In this case, the measured parameters are ini- tialized (see section 4.9 R ESET mV/pH...
  • Page 51 Multi 340i Operation Outputting the calibra- Press the <RCL> key repeatedly until CAL SEr appears on the tion protocol on the display. interface mV/pH C A L % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store...

  • Page 52: Clearing The Memory

    Operation Multi 340i 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 53: Transmitting Data

    Multi 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 Operation Multi 340i 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 55: Pc/External Printer (Rs232 Interface)

    Multi 340i 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 AK340/B (PC) or AK325/S (ext. printer) cable. Warning The RS232 interface is not galvanically isolated. When connecting an earthed PC/printer, measurements cannot be per- formed in earthed media as incorrect values would result.

  • Page 56: Configuration

    Operation Multi 340i 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 Current value in mbar (no input possible) Calibration...
  • Page 57 Multi 340i Operation mV/pH C A L % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC 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 Multi 340i 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 Auto Store ARng LoBat...
  • Page 59 Multi 340i Operation Using <▲> <▼>, toggle between t20 and t25. Confirm with <RUN/ENTER>. The date flashes on the display. Date and time mV/pH D i s % mg/l mbar 0 9 0 Time Baud ° Day.Month ° Year Ident Tref25 Tref20 AutoCal DIN...

  • Page 60: Reset

    Operation Multi 340i 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 0 mV Slope -59.16 mV Measuring mode...
  • Page 61 Multi 340i 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 Time Baud ° Day.Month No. °...
  • Page 62 Operation Multi 340i mV/pH % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref20 AutoCal DIN Auto Store Tref25 ARng LoBat AutoCal TEC Using <▲> <▼>, switch between no and YES. YES: Resetting the Cond measuring parameters. no: Retaining settings. Confirm with <RUN/ENTER>.

  • Page 63: Maintenance, Cleaning, Disposal

    Multi 340i 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 64: Cleaning

    Maintenance, cleaning, disposal Multi 340i 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 65: What To Do If

    Multi 340i What to do if... What to do if... pH system messages Error message 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... Multi 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 Remedy value pH electrode:...

  • Page 67: Oxi System Messages

    Multi 340i What to do if... Oxi system messages Error message 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 68: Conductivity System Messages

    What to do if... Multi 340i 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 69: General Errors

    Multi 340i 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 70 What to do if... Multi 340i...

  • Page 71: Technical Data

    Multi 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 Multi 340i Oxi measuring ranges mg/l Measuring range I 0 ... 19.99 0 ... 199.9 Resolution 0.01 Measuring range II 0 ... 90.0l 0 ... 600 Resolution Measuring range/resolu- °C tion temperature Measuring range (Resolution) 0 ... 50.0 (0.1) Precision of Concentration ±...
  • Page 73 0 °C ... 35 °C according to EN 27 888; ± 0.5 % 35 °C ... 50 °C extended nLF function acc. to WTW measurements Range 0.0 ... 42.0 Accuracy Sample temperature ± 0.1 5 °C ... 25 °C ± 0.2 25 °C ...
  • Page 74 Technical data Multi 340i Power supply Batteries 4 x 1.5 V alkali-manganese batteries, Type Operational life Approx. 3000 operating hours Mains The following applies to all plug-in power supplies:Connection max. Overvoltage category II Plug-in power supply unit (Euro, US , UK, Australian plug) FRIWO FW7555M/09, 15.1432 Friwo Part.
  • Page 75 Multi 340i Technical data FCC Class A Equipment Statement Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
  • Page 76 Technical data Multi 340i...

  • Page 77: 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 78 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 Cell constant [cm ] (internat. k) °C Temperature unit, degrees Celsius Calibration Cd...
  • Page 79 Multi 340i Lists Nonlinear temperature compensation Display range exceeded (Overflow) OxiCal Automatic calibration for D. O. measurements pH value Slope (internat. k) Salinity SELV Safety Extra Low Voltage Slope setting on calibration Temperature coefficient (internat. α ) Temperature measurement active (temperature sensor) 25/T25 Reference temperature of 25 °C...
  • Page 80 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 81 (e. g. a gold or platinum surface). ® OxiCal WTW name for a procedure to calibrate D. O. measuring systems in water vapor saturated air. Oxygen saturation Short name for the relative D. O. saturation.
  • Page 82 The slope of a linear calibration function. Slope (relative) Designation used by WTW in the D. O. measuring technique. It ex- presses the relationship of the slope value to the value of a theoretical reference probe of the same type of construction.
  • Page 83 Multi 340i Index Index Air pressure display Energy saving feature pH calibration evaluation 67, 68 Asymmetry Error messages pH value Authorized use Plug-in power supply 20, 22 AutoCal TEC Precautions AutoRange (oxygen) Initial commissioning AutoRead Initialization Conductivity Interval Reference temperature D.
  • Page 84 Index Multi 340i values Two-point calibration (pH) 20, 23...

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