wtw StirrOx G Operating Manual
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wtw StirrOx G Operating Manual

Dissolved oxygen sensor with integrated stirrer
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OPERATING MANUAL
OPERATING MANUAL
ba25310e07 08/2018
StirrOx G
DISSOLVED OXYGEN SENSOR WITH INTEGRATED STIRRER

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Summary of Contents for wtw StirrOx G

  • Page 1 OPERATING MANUAL OPERATING MANUAL ba25310e07 08/2018 StirrOx G DISSOLVED OXYGEN SENSOR WITH INTEGRATED STIRRER...
  • Page 2 StirrOx G © Copyright 2018 Xylem Analytics Germany GmbH Printed in Germany. ba25310e07 08/2018...

  • Page 3: Table Of Contents

    Contents StirrOx G - Contents Overview ......... 5 Safety instructions .
  • Page 4 Contents StirrOx G ba25310d07 08/2018...

  • Page 5: Overview

    StirrOx G Overview Overview Structure Shaft housing Connection head On/Off key for stirrer Cable screw joint Stirring paddle WP-ST membrane cap (filled with electrolyte solution) Gold working electrode (cathode) Insulator Lead counter electrode (anode) Ventilation area Temperature sensor and auxiliary electrode Recommended BOD measurements in BOD sample bottles.

  • Page 6: Safety Instructions

    Commissioning  D.O. sensor StirrOx G, filled with electrolyte solution and ready to operate Scope of delivery ®  Calibration and storage vessel, OxiCal ...

  • Page 7: Measuring / Operation

    Pressing the On/Off key switches the stirrer on. Pressing once more switches the stirrer off again. Measurement in The displacement volume of the StirrOx G (5,6 ml) is dimensioned so that the sample bottles sample bottle is closed free of air bubbles after inserting the sealing plug. If...

  • Page 8: Storage

    Maintenance, cleaning, replacement StirrOx G After each measurement series (before storing the sensor) clean the sensor (exterior cleaning). Storage Always store the sensor in the calibration and storage vessel at a temperature in the range 0 ... +50 °C (32 ... 122 °F). Make sure that the sponge in the calibration and storage vessel is always moist.

  • Page 9: Outside Cleaning

    ENERAL on page 8. MAINTENANCE INSTRUCTIONS General WTW delivers the sensor ready to operate (see section 3). The electrolyte information solution and membrane cap must only be replaced if:  a calibration error occurs and the membrane is heavily contaminated ...
  • Page 10 Maintenance, cleaning, replacement StirrOx G Changing the electrolyte and membrane cap Pull off the stirring paddle and Rinse the sensor head with Carefully rub and dry the screw off the membrane deionized water. counter electrode with a lint- head. free paper towel.
  • Page 11 StirrOx G Maintenance, cleaning, replacement Carefully shake off the drops Fill a new membrane cap with Remove any air bubbles by of water. ELY/G electrolyte solution. carefully tapping the membrane cap. Additionally, you can prevent air bubbles by throwing the first filling away and refilling the membrane cap.

  • Page 12: Cleaning The Electrodes

    Maintenance, cleaning, replacement StirrOx G Cleaning the electrodes CAUTION Before starting to work with the sensor, please note the G ENERAL on page 8. MAINTENANCE INSTRUCTIONS General Cleaning is only required in cases of slopes too low or too high (sensor...
  • Page 13 StirrOx G Maintenance, cleaning, replacement Thoroughly rinse the sensor Water the counter electrode in Carefully shake off the drops head with deionized water. deionized water for at least of water. 10 minutes. Fill a new membrane cap with Remove any air bubbles by Rinse the sensor head with ELY/G electrolyte solution.

  • Page 14: Checking The Sensor For Freedom From Zero-Current

    Maintenance, cleaning, replacement StirrOx G Readiness to measure To measure, plug in the stirring paddle. After approx. 30 to 50 minutes, the sensor is ready for operation. Subsequently calibrate the sensor. If you want to measure very low oxygen concentrations (< 0.5 % saturation), we recommend to let the sensor rest overnight and then calibrate it.

  • Page 15: What To Do If

    StirrOx G What to do if ... disposed of with the household refuse. Electrolyte Disposal according to the safety data sheet. solution What to do if ... Error symptom Cause Remedy The sensor is in the air – No connection between –...
  • Page 16 Technical data StirrOx G Dimensions (in mm) 17,5 Weight 310 g (with 2 m cable) Materials Working electrode Gold Counter electrode Lead – Shaft housing – Connection head – Membrane head – Cable screw joint Membrane Sensor head Epoxy, PEEK...
  • Page 17 StirrOx G Technical data Measurement Measuring ranges at 20 °C 0 ... 50 mg/l D.O. conditions (68 °F) 0 ... 600 % D.O. saturation 0 ... 1250 mbar D.O. partial pressure Temperature range 0 ... 50 °C (32 ... 122 °F) Depth of immersion min.
  • Page 18 Technical data StirrOx G Maximum supply voltage current quiescent current consumption current in normal operation current with blocked stirrer / mA / mA / mA < 4.0 < 38 < 189 < 4.8 < 35 < 147 < 5.8 < 32 <...

  • Page 19: Wear Parts And Accessories

    Order no. ® Calibration and storage vessel OxiCal 205 349 ® Stand for OxiCal Sta-ST 205 348 Karlsruhe bottle - suitable for BOD KF 12 205 700 measurement For further accessories, refer to the WTW catalog or the Internet ba25310d07 08/2018...
  • Page 20 Wear parts and accessories StirrOx G ba25310d07 08/2018...
  • Page 22 For more information on how Xylem can help you, go to xyleminc.com. ® Service address: Xylem Analytics Germany Sales GmbH & Co. KG Dr.-Karl-Slevogt-Str. 1 82362 Weilheim Germany Tel.: +49 881 183-325 Fax: +49 881 183-414 E-Mail wtw.rma@xyleminc.com Internet: www.WTW.com Xylem Analytics Germany GmbH Dr.-Karl-Slevogt-Str. 1 82362 Weilheim Germany...

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