wtw Oxi 197i Operating Manual
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wtw Oxi 197i Operating Manual

Portable oxygen measuring instrument
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Operating manual
Oxi 197i
Portable oxygen measuring instrument
ba75335e02
11/2004

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  • Page 1 Operating manual Oxi 197i Portable oxygen measuring instrument ba75335e02 11/2004...
  • 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

    Oxi 197i List of contents Overview ........5 Display .
  • Page 4 List of contents Oxi 197i Cleaning ........47 Disposal .

  • Page 5: Overview

    Oxi 197i Overview Overview The portable Oxi 197i measuring instrument enables you to carry out oxygen measurements rapidly and reliably. The Oxi 197i provides the maximum degree of operating comfort, reli- ability and measuring certainty for all applications. ® The proven OxiCal calibration procedure supports you in your work with the measuring instrument.

  • Page 6: Display

    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. Display Status display indicator Sensor symbol...

  • Page 7: Keypad

    Oxi 197i Overview Keypad Key functions Switch measuring instrument on/off ON / OFF <ON/OFF> Select the measuring mode <M>: – D. O. concentration – Oxygen saturation Calibrate <CAL> Activate/deactivate the AutoRead function AUTO READ <AUTO READ> Confirm entries, start AutoRead,...

  • Page 8: Socket Field

    Overview Oxi 197i Socket field Sensors You can use the following sensors with the Oxi 197i: l Oxygen depth armature l D. O. sensor CellOx 325, or l D. O. sensor DurOx 325, or l Self-stirring D. O. sensor StirrOx G...

  • Page 9: Safety

    Oxi 197i 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 10: General Safety Instructions

    Safety Oxi 197i 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 11: Commissioning

    Oxi 197i Commissioning Commissioning Scope of delivery l Portable measuring instrument, Oxi 197i with integrated recharge- able battery l Carrying and positioning handle l Carrying strap l Sensor quiver l Plug-in power supply unit l Operating manual Power supply Mains operation and...

  • Page 12: Initial Commissioning

    Connecting the plug-in power supply unit Connect the plug (1) to the socket (2) of the measuring instru- ment. Connect the original WTW plug-in power supply (3) to an easily accessible mains socket. Initial commissioning Perform the following activities: l For mains operation and charging the battery: Connect the plug-in power supply (see section 3.2 P...
  • Page 13 Oxi 197i Commissioning mg/l Time Baud 0 9 0 4 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Set the date of the current day with <L> <M>. Confirm with <RUN/ENTER>. The date (month) flashes in the display.

  • Page 14: Sensor Quiver

    Commissioning Oxi 197i Sensor quiver To store the sensors during field operation and to keep the sensor ele- ment moist, the quiver tip contains a sponge rubber insert that can be moistened with deionized water. Note For further details on proper storage, refer to the operating manual of the sensor.

  • Page 15: Operation

    Oxi 197i Operation Operation Switching on the measuring instrument Connect the D. O. sensor to the measuring instrument. Press the <ON/OFF> key. The display test appears briefly on the display. The relative slope for the sensor type that was just connected subsequently appears for approx.

  • Page 16: Measuring

    Operation Oxi 197i Measuring 4.2.1 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). If a...

  • Page 17: Measuring The D. O. Concentration

    Oxi 197i Operation 4.2.2 Measuring the D. O. concentration Note When measuring the concentration of test samples with a salt content of more than 1 g/l, a salinity correction is required. For this, you have to measure and input the salinity of the measured medium first. This is de- scribed in section 4.3.3 on page 27.

  • Page 18: Measuring The D. O. Saturation

    Operation Oxi 197i 4.2.3 Measuring the D. O. saturation You can measure the D. O. saturation as follows: Perform the preparatory activities according to section 4.2.1 Immerse the D. O. sensor in the test sample. Press the <M> key repeatedly until the saturation in % appears on the display.

  • Page 19: Autoread Ar (Drift Control) And Hold Function

    Oxi 197i Operation 4.2.5 AutoRead AR (drift control) and hold function 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. With the aid of the hold function the measured value display is frozen.

  • Page 20: Sensor With Stirrer (Stirrox G)

    Operation Oxi 197i To terminate the AutoRead function: Press the <AR> key. 4.2.6 Sensor with stirrer (StirrOx G) Connection Connect the 2-pole stirrer plug to the stirrer output of the measuring in- strument (designation REL1). Note The automatic stirring function of the self-stirring D. O. sensor...

  • Page 21: Calibration

    Sensors of different classes can be calibrated separately. When a sen- sor of one class is calibrated the calibration data of the other class re- main stored. The Oxi 197i recognizes the class of the connected sensor and automatically uses the correct calibration data.
  • Page 22 Operation Oxi 197i Printing the The calibration protocol contains the calibration data of the current cal- calibration record ibration. You can transmit the calibration protocol to a printer via the se- rial interface (see page 35). Note You can automatically print a calibration record after the calibration. To do so, connect a printer to the interface according to section 4.5.3 be-...

  • Page 23: Calibrating With The Air Calibration Vessel

    Oxi 197i Operation 4.3.1 Calibrating with the air calibration vessel Proceed as follows to calibrate the instrument: Connect the D. O. sensor to the measuring instrument. Keep an air calibration vessel ready for use. Note The sponge in the air calibration vessel must be moist (not wet). Follow ®...
  • Page 24 Operation Oxi 197i mg/l Time Baud 1 7 6 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Switch to the measuring mode with <M>. Note In chapter 6 W ... page 49, you will find the measures to HAT TO DO IF take for error elimination.

  • Page 25: Calibrating Via A Comparison Measurement

    Oxi 197i Operation 4.3.2 Calibrating via a comparison measurement Proceed as follows to calibrate the instrument: Connect the D. O. sensor to the measuring instrument. Press the <CAL> key repeatedly until O FAC appears. mg/l Time Baud 1 7 6 °...
  • Page 26 Operation Oxi 197i mg/l Time Baud 0 0 7 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Switch to the measuring mode with <M> or <RUN/ENTER> . Note If the correction factor deviates from 1.000, the display of the measured...

  • Page 27: Entering The Salt Content (Salinity)

    Oxi 197i Operation 4.3.3 Entering the salt content (salinity) 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 (the measured salinity) of the test sample (range 0.0 - 70.0) and to switch on the salinity correction.

  • Page 28: Saving

    Operation Oxi 197i Saving The measuring instrument has an internal data memory. It can store up to 500 datasets. A complete data record consists of: l Storage location l Date/time l Measured value l Temperature l Temperature measuring procedure l ID number...
  • Page 29 Oxi 197i Operation mg/l Time Baud ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Using <L> <M>, enter the required ID number (1 ... 999). Confirm with <RUN/ENTER>. The instrument changes to the measuring mode. StoFull...

  • Page 30: Saving Automatically

    Operation Oxi 197i 4.4.2 Saving automatically The save interval (Int 1) determines the chronological interval between automatic save processes. After the fixed interval has expired, the current data record is transmit- ted to the storage and to the interface. The default setting for the save interval (Int 1) is OFF.
  • Page 31 Oxi 197i Operation Confirm with <RUN/ENTER>. The prompt for the ID number appears on the display. mg/l Time Baud ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Set the required ID number with <L> <M>. Confirm with <RUN/ENTER>.

  • Page 32: Outputting The Data Storage

    Operation Oxi 197i 4.4.3 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 on the interface Outputting stored data Press the <RCL>...
  • Page 33 Oxi 197i Operation Note If you want to search for a certain element (e.g. date), proceed as fol- lows: Using <RUN/ENTER>, select the element (e.g. date). Press <L> or <M> repeatedly until the required date appears on the display. After approx. 2 s the temperature of the displayed measured value appears.
  • Page 34 Operation Oxi 197i Sample printout: Device No.: 99990000 09.03.02 17:10 101.7 % 17.6° Tauto Ident : 09.03.02 17:11 7.11 mbar 17.6° Tauto Ident : 09.03.02 17:12 7.88 mg/l 17.6° Tauto Ident : 09.03.02 17:15 7.11 mg/l 17.8° Tauto SAL = 17.9...
  • Page 35 Oxi 197i Operation Using <M> or <RUN/ENTER>, you can switch back to the measuring mode. Outputting the Press the <RCL> key repeatedly until CAL SEr appears on the calibration protocol display. on the interface mg/l Time Baud S E R °...

  • Page 36: Clearing The Memory

    Operation Oxi 197i 4.4.4 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 measuring mode.

  • Page 37: Transmitting Data

    Oxi 197i Operation Transmitting data You have the following possibilities of transmitting data: l One of the following options: – With the AutoStore function (page 30), measured values are periodically saved internally (save interval Int 1) and output on the interface.
  • Page 38 Operation Oxi 197i Setting the The default setting for the interval is OFF. Data transmission To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min, 5 interval min, 10 min, 15 min, 30 min, 60 min): Press the <RUN/ENTER>...

  • Page 39: Recorder (Analog Output)

    Oxi 197i Operation 4.5.2 Recorder (analog output) You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the AK323 interface cable. The data output automatically switches to Recorder output. 1 free...

  • Page 40: Pc/External Printer (Rs232 Interface)

    Operation Oxi 197i 4.5.3 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 to connect the interface to the devices.

  • Page 41: Configuration

    Oxi 197i Operation 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 Air pressure display...
  • Page 42 Operation Oxi 197i Displaying the air pressure mg/l Time Baud 9 4 9 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Confirm with <RUN/ENTER>. Int 3 appears on the display. Calibration interval mg/l Time Baud °...
  • Page 43 Oxi 197i Operation Date and time mg/l Time Baud 0 9 0 4 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Set the date of the current day with <L> <M>. Confirm with <RUN/ENTER>. The date (month) flashes in the display.

  • Page 44: Reset

    Operation Oxi 197i Reset You can reset (initialize) the measurement parameters and the config- uration parameters separately from one another. Measurement The following measured parameters (O InI) are reset to the default parameters condition: Measuring mode D. O. concentration AutoRange automatic measure-...
  • Page 45 Oxi 197i Operation Resetting the Press the <RUN/ENTER> key and hold it down. measuring parameters Press the <CAL> key. mg/l Time Baud ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Using <L> <M>, switch between no and YES.
  • Page 46 Operation Oxi 197i...

  • Page 47: Maintenance, Cleaning, Disposal

    Oxi 197i Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The measuring instrument is maintenance-free. Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as re- quired. Warning The housing components are made out of synthetic materials (polyurethane, ABS and PMMA).
  • Page 48 Maintenance, cleaning, disposal Oxi 197i Measuring instrument, Dispose of the measuring instrument without the rechargeable battery as electronic waste at an appropriate collection point.

  • Page 49: What To Do If

    Oxi 197i What to do if... What to do if... Cause Remedy Display LoBat – Battery almost empty – Charge the battery (see section 3.2) Instrument does not Cause Remedy react to keystroke – Operating condition undefined – Processor reset: or EMC load unallowed Press the <RCL>...
  • Page 50 What to do if... Oxi 197i Error message E7 Cause Remedy Membrane damaged – Membrane damaged – Regenerate sensor – Membrane head not screwed – Screw membrane head tight on tight enough AR flashes Cause Remedy continuously No stable measured value –...
  • Page 51 – Output data storage and clear data storage You want to know which Cause Remedy software version is in – E. g., a question by the WTW – Simultaneously press the the instrument service department <CAL> and <ON/OFF> keys and release them again. The...
  • Page 52 What to do if... Oxi 197i...

  • Page 53: Technical Data

    Oxi 197i Technical data Technical data General data Test certificates cETLus, CE Dimensions approx. 90 x 200 x 190 mm Weight approx. 1.5 kg (without plug-in power supply) Mechanical structure Type of protection: IP 67 Electrical safety Protective class: Ambient...
  • Page 54 Technical data Oxi 197i Serial interface Automatic switchover when a PC or a printer is connected via the cable, AK 340/B or AK 325/S. Type RS232, data output Baud rate Can be set to 1200, 2400, 4800, 9600 Baud Data bits...

  • Page 55: Measuring Ranges, Resolutions, Accuracies

    Oxi 197i Technical data 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 IP protection EN 60529:1991 Measuring ranges, resolutions, accuracies...
  • Page 56 Technical data Oxi 197i...

  • Page 57: Lists

    Oxi 197i 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 58 Lists Oxi 197i Abbreviations AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest reso- lution °C Temperature unit, degrees Celsius Calibration Error message see chapter 6 W HAT TO DO IF Initialization Resets individual basic functions to the status they...
  • Page 59 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 60 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 sensor of the same type of construction.
  • Page 61 Oxi 197i Index Analog output Authorized use LoBat AutoRange AutoRead Criteria Mains operation Measuring range selection Batteries Measuring the D. O. concen- Charging tration Battery Measuring the D. O. satura- Charging time tion Calibration Operating safety start Calibration record Connecting a printer...
  • Page 62 Index Oxi 197i...
  • Page 63 Wissenschaftlich-Technische Werkstätten GmbH Dr.-Karl-Slevogt-Straße 1 D-82362 Weilheim Germany Tel: +49 (0) 881 183-0 +49 (0) 881 183-100 Fax: +49 (0) 881 183-420 E-Mail: Info@WTW.com Internet: http://www.WTW.com...

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