Xylem MULTI 1970I PORTABLE MULTIPARAMETER METERS User Manual

Multi 1970iba75693e01 01/2007Operating manualRUN / ENTERAUTO READCALSTOMRCLON / OFFMulti 1970iMulti 1970img/lO71 7 692°CARngTPREL1Portable pH / oxyge

Overview Multi 1970i8

Multi 1970i Safety92 SafetyThis operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance

Safety Multi 1970i102.2 General safety instructionsThis instrument is built and inspected according to the relevant guide-lines and norms for electron

Multi 1970i Commissioning113 Commissioning3.1 Scope of deliveryz Multi 1970i portable multiparameter measuring instrument with inte-grated rechargeabl

Commissioning Multi 1970i12Connecting the plug-inpower supply unit3.3 Initial commissioningPerform the following activities:z For mains operation and

Multi 1970i Commissioning134 Set the date of the current day with <▲> <▼>.5 Confirm with <RUN/ENTER>.The date (month) flashes in the

Commissioning Multi 1970i143.4 Sensor quiverTo store the sensors during field operation and to keep the sensor ele-ment moist, the quiver tip contains

Multi 1970i Operation154 Operation4.1 Operating structureActive and inactive RELsocketIn addition to the pH/ORP sensor, the sensor on the REL1 or REL2

Operation Multi 1970i16NoteWhen a sensor is connected to the active REL socket, the measuring instrument recognizes the sensor or the measuring cell a

Multi 1970i Operation174.3 pH value / ORP voltage4.3.1 General informationPreparatory activities Perform the following preparatory activities when you

Accuracy whengoing to pressThe use of advanced technology and the high quality standard of our instruments are the result of a continuous development.

Operation Multi 1970i18Temperature measure-ment in pH measure-mentsYou can perform pH measurements with or without a temperature sen-sor as well as wi

Multi 1970i Operation194.3.2 Measuring the pH valueAutoRead AR(Drift control) and holdfunctionThe AutoRead function (drift control) checks the stabili

Operation Multi 1970i20NoteThe current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>.

Multi 1970i Operation214.3.4 pH calibrationWhy calibrate? pH electrodes age. This changes the asymmetry (zero point) and slope of the pH electrode. As

Operation Multi 1970i22NoteYou can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface acco

Multi 1970i Operation23Calibration evaluation After calibrating, the measuring instrument automatically evaluates the calibration. The asymmetry and s

Operation Multi 1970i24AutoCal TEC For this procedure, use any two WTW technical buffer solutions (pH values at 25 °C: 2.00 / 4.01 / 7.00 / 10.01).Not

Multi 1970i Operation25NoteAt this point, the AutoCal TEC calibration can be terminated with <M>. This corresponds to a single-point calibration

Operation Multi 1970i2610 When the measured value is stable, AR disappears. The value of the slope (mV/pH) appears on the display. The sensor sym-bol

Multi 1970i Operation274.4 Dissolved oxygen4.4.1 General informationNoteD. O. measurements with the Multi 1970i can only be carried out using a CellOx

Multi 1970i List of contents11 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.1 General features . . . . . .

Operation Multi 1970i28NoteIncorrect calibration of D. O. probes will result in incorrect measured values.Calibrate at regular intervals.Temperature s

Multi 1970i Operation294.4.2 Measuring the D. O. concentrationWhen measuring the concentration of test samples with a salt content of more than 1 g/l,

Operation Multi 1970i304.4.3 Measuring the D. O. saturationYou can measure the D. O. saturation as follows: 4 While pressing the <RUN/ENTER> key

Multi 1970i Operation314.4.4 AutoRead AR (Drift control) and hold functionThe AutoRead function (drift control) checks the stability of the mea-sureme

Operation Multi 1970i324.4.5 D. O. calibrationWhy calibrate? D. O. probes age. This changes the slope of the D. O. sensor. Calibra-tion determines the

Multi 1970i Operation33Sensor evaluation After the calibration, the measuring instrument evaluates the current status of the sensor against the relati

Operation Multi 1970i34NoteIn chapter 6 WHAT TO DO IF... from page 67, you will find the measures to take for error elimination.5 Press the <RUN/E

Multi 1970i Operation354.4.6 Entering the salt content (salinity)A salt content correction is required in the oxygen concentration mea-surement of sam

Operation Multi 1970i364.5 Conductivity4.5.1 General informationNoteConductivity measurements with the Multi 1970i can only be carried out using the T

Multi 1970i Operation37TemperaturecompensationThe nonlinear temperature compensation is set fixed and is shown on the display by nLF.Reference tempera

List of contents Multi 1970i24.8.1 Data transmission interval (Int 2) . . . . . . . . . . . . 554.8.2 PC/external printer (RS232 interface) . . . .

Operation Multi 1970i384.5.2 Measuring the conductivityYou can carry out the conductivity measurements as follows:4.5.3 Measuring the salinityYou can

Multi 1970i Operation394.5.4 AutoRead AR (Drift control) and hold functionThe AutoRead function (drift control) checks the stability of the mea-sureme

Operation Multi 1970i404.5.5 Determining the cell constant (Calibration in the control standard)Why determine the cellconstant?Aging slightly changes

Multi 1970i Operation41Calibration evaluation After the calibration, the measuring instrument automatically evaluates the current status of the calibr

Operation Multi 1970i42NoteIf error message E3E3E3E3 appears refer to chapter 6 WHAT TO DO IF... 4 Press the <RUN/ENTER> key. The AutoRead measu

Multi 1970i Operation434.6 Calibration intervals (Int 3, Int 4, Int 5)For each measured variable, a time interval is stored. When it has ex-pired, you

Operation Multi 1970i444.7 Saving dataThe portable Multi 1970i multiparameter measuring instrument has an internal data storage. It can store up to 50

Multi 1970i Operation45Message StoFullStoFullStoFullStoFull This message appears when all of the 500 storage locations are occu-pied.You have the foll

Operation Multi 1970i464.7.2 Switching on AutoStore (Int 1)The save interval (Int 1) determines the chronological interval between automatic save pro

Multi 1970i Operation47As soon as all of the 500 storage locations are occupied, AutoStore is terminated (Int 1 = OFF). If there are not enough storag

Multi 1970i Overview31Overview1.1 General featuresThe Multi 1970i portable multiparameter measuring instrument enables you to carry out pH measurement

Operation Multi 1970i484.7.3 Outputting the data storageYou can output the contents of the data storage:z Stored data on the displayz Calibration data

Multi 1970i Operation49NoteIf you want to search for a certain element of the data record (e.g. date), proceed as follows:Outputting stored datato the

Operation Multi 1970i50Sample printout:Outputting the calibra-tion dataon the display No. 1: 09.03.02 17:10pH 10.01 25 °CTauto

Multi 1970i Operation512 Press the <RUN/ENTER> key. The data of the last calibration of all measured variables ap-pears in the following sequenc

Operation Multi 1970i525 Press <RUN/ENTER> to display the cell constant. The dis-played value is:z the current, calibrated cell constant (with s

Multi 1970i Operation53Outputting the calibra-tion protocol on theinterfaceSample printout:1 Press the <RCL> key repeatedly until CAL SEr appear

Operation Multi 1970i544.7.4 Clearing the memoryWith this function, you can delete the stored data records. 500 storage locations will then be availab

Multi 1970i Operation554.8 Transmitting dataYou have the following possibilities of transmitting data:z One of the following options:– With the AutoSt

Operation Multi 1970i56NoteWhen the AutoStore function is active at the same time, the data trans-mission is performed according to the setting of the

Multi 1970i Operation574.8.2 PC/external printer (RS232 interface)Via the RS 232 interface, you can transmit the data to a PC or an ex-ternal printer.

Overview Multi 1970i4NoteIf you need further information or application notes, you can obtain the following material from WTW:z Application reportsz P

Operation Multi 1970i584.9 ConfigurationYou can adapt the measuring instrument to your individual require-ments. To do this, the following parameters

Multi 1970i Operation59Display during thepH calibrationDisplaying theair pressureThe air pressure in mbar is only displayed if a D. O. sensor is conne

Operation Multi 1970i60Dissolved oxygencalibration intervalConductivitycalibration intervalSwitching over thereference temperature11 Set the required

Multi 1970i Operation61Date and time17 Set the date of the current day with <▲> <▼>.18 Confirm with <RUN/ENTER>.The date (month) fla

Operation Multi 1970i624.10 Reset You can reset (initialize) the measurement parameters and the config-uration parameters separately from one another.

Multi 1970i Operation63Resetting themeasuring parameters1 Press the <RUN/ENTER> key and hold it down.2 Press the <CAL> key. The setting to

Operation Multi 1970i64Resetting theconfiguration parame-ters7 Using <▲> <▼>, switch between no and YES.YES: Resetting the Cond measuring

Multi 1970i Maintenance, cleaning, disposal655 Maintenance, cleaning, disposal5.1 MaintenanceThe measuring instrument is maintenance-free.5.2 Cleaning

Maintenance, cleaning, disposal Multi 1970i66Measuring instrument Dispose of the measuring instrument without the rechargeable battery as electronic w

Multi 1970i What to do if...676 What to do if...6.1 pH system messagesError message 0FL0FL0FL0FL Error message E3E3E3E3 Cause RemedypH electrode:– N

Multi 1970i Overview51.3 KeypadKey functions1.4 Jack fieldWarningOnly connect sensors to the measuring instrument that cannot return any voltages or c

What to do if... Multi 1970i68 No stable measuredvalue Obviously incorrectmeasured valuesBuffer solutions– Incorrect buffer solutions – Change calib

Multi 1970i What to do if...696.2 Oxi system messagesError message 0FL0FL0FL0FLError message E3E3E3E3Error message E7E7E7E7AR flashescontinuously Caus

What to do if... Multi 1970i70Measured value too lowMeasured value toohigh6.3 Conductivity system messagesError message OFLOFLOFLOFL Error message E3

Multi 1970i What to do if...716.4 General errorsDisplay LoBat Instrument does notreactto keystroke Display totototo Sensor symbol flashes Message St

What to do if... Multi 1970i72

Multi 1970i Technical data737 Technical data7.1 General dataDimensions approx. 90 x 200 x 190 mmWeight approx. 1.5 kg (without plug-in power supply)Me

Technical data Multi 1970i747.2 Measuring ranges, resolutions, accuracies7.2.1 pH/ORPSerialinterfaceConnection of the cable AK 340/B or AK 325/SBaud r

Multi 1970i Technical data757.2.2 Dissolved oxygenMeasuring rangesand resolutionsVariable Measuring range ResolutionConcentration [mg/l] 0 ... 19.990

Technical data Multi 1970i767.2.3 ConductivityMeasuring rangesand resolutionsVariable Measuring range Resolution [µS/cm] 0 ... 1999 1 [mS/cm] 0.00 ...

Multi 1970i Lists778ListsThis chapter provides additional information and orientation aids.Abbreviations The list of abbreviations explains the indica

Overview Multi 1970i6Maximum numberof sensors to be con-nectedThe following sensors can be connected to the Multi 1970i (maximum configuration):z One

Lists Multi 1970i78AbbreviationsConductivity value (international γ)AR AutoRead (drift control)ARng Automatic range switchingMeasuring instrument meas

Multi 1970i Lists79nLF Nonlinear temperature compensationOFL Display range exceeded (Overflow)OxiCal Automatic calibration for D. O. measurementspH p

Lists Multi 1970i80GlossaryAdjusting To manipulate a measuring system so that the relevant value (e. g. the displayed value) differs as little as poss

Multi 1970i Lists81Measuring system The measuring system comprises all the devices used for measuring, e. g. measuring instrument and sensor. In addi

Lists Multi 1970i82Salt content General designation for the quantity of salt dissolved in water.Sample Designation of the sample ready to be measured.

Multi 1970i Index83AAir pressure display 59Asymmetry 21Authorized use 9AutoCal TEC 21, 24AutoReadConductivity 39Criteria 31Oxygen 31pH 19BBatteriesCha

Index Multi 1970i84ues 55Two-point calibration 21Two-point calibration (pH) 21, 25

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Multi 1970i Overview7NoteThe sensor sockets, 1 and 2 must not be assigned at the same time. On the two sockets, 5 and 6, only different sensor types (