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wtw TriOxmatic 701 Operating Manual

D. o. probe
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Operating manual
D. O. probe
®
TriOxmatic
701
ba25308e06
07/2015
1

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Summary of Contents for wtw TriOxmatic 701

  • Page 1 Operating manual D. O. probe ® TriOxmatic ba25308e06 07/2015...
  • Page 2 Copyright 2000, WTW GmbH © Weilheim Reprinting - even as excerpts - is only allowed with the explicit written authorization of WTW GmbH, Weilheim. Printed in Germany.

  • Page 3: Table Of Contents

    Contents Overview ....... 5 ® 1.1 Overall view of the D. O. probe TriOxmatic 701 .
  • Page 4 Contents Technical data ......47 7.1 General data ......47 7.2 Measuring conditions .

  • Page 5: Overview

    Overview Overview Overall view of the D. O. probe ® TriOxmatic...

  • Page 6: Construction Of The D. O. Probe Trioxmatic 701

    Overview Construction of the D. O. probe ® TriOxmatic Protection cap (for transport and storage) Protection hood Membrane head, WP 25 i Shaft Closing head Protection ring for G1 thread Working electrode (gold cathode) Counter electrode (silver anode) Isolator Reference electrode (silver bromide)

  • Page 7: Safety

    Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the probe. Consequently, all responsible personnel must read this operating manual before working with the probe. The operating manual must always be available within the vicinity of the probe.

  • Page 8: Authorized Use

    ECHNICAL DATA The temperature specified for using the probe (chapter 7 ) has to be observed. Protect your probe ECHNICAL DATA especially against frost or overheating. Caution The probe is only allowed to be opened by personnel authorized by WTW.
  • Page 9 Safety Safe operation If safe operation is no longer possible, the probe must be taken out of service and secured against inadvertent operation! Safe operation is no longer possible if the probe has been damaged in transport  has been stored under adverse conditions for a lengthy ...
  • Page 10 Safety...

  • Page 11: Commissioning

    Commissioning Commissioning Scope of delivery ®  TriOxmatic 701 with accessory kit ZBK 25 (with 1.5 m cable length: protection ring for the G1 thread included) The probes are filled with electrolyte and are equipped  with a protection hood and a protection cap. Commissioning / Readiness for measuring 1 Connect the probe to the measuring instrument.

  • Page 12: Measuring

    Commissioning Measuring Provide the necessary minimum flow (see chapter 7 ), e.g.: ECHNICAL DATA  the flow velocity of the water is sufficient  pull the probe slowly through the water by hand  the turbulence in the activated sludge basin is sufficient. Exterior cleaning and function check The function check is the simplest way of letting you know whether the probe needs to be cleaned and calibrated.
  • Page 13 Commissioning 5 Switch the measuring instrument to the % saturation operating mode. Read the measured value and determine whether it lies within the range of precision required by the user. Note If the measured value is within the accuracy tolerance required by the user it is not necessary to clean or recalibrate the probe.

  • Page 14: Cleaning With Normal Operation (E.g. Domestic Sewage)

    Commissioning Function check in In the case of air temperatures under 5 °C do not perform air-saturated water the function check in air but in air-saturated water that has a higher temperature. You obtain air-saturated water by pouring water several times in and out of two vessels so that it sparkles.
  • Page 15 Commissioning 2 Carefully clean the probe shaft and the membrane. Caution Clean the membrane very carefully! The membrane may be damaged by sharp-edged objects or when lying on stones. 3 Clean the protection hood as well.
  • Page 16 Commissioning 4 Screw on the protection hood again. 5 Rinse the probe with clear tapwater. 6 Carefully dry the membrane using a lint-free paper towel. Wait at least 15 minutes for adjustment, then calibrate the probe.

  • Page 17: Storing

    Commissioning Note For calibrating the probe refer to the relevant operating manual of the industrial monitor. Note Maintenance of the probe is required (see chapter 4 ) if: AINTENANCE CLEANING DISPOSAL SPARE PARTS  the membrane is damaged or  the probe cannot be calibrated anymore (Leakage or Sens Reg display).
  • Page 18 Commissioning...

  • Page 19: Maintenance, Cleaning, Disposal, Spare Parts

    Maintenance, cleaning, disposal, spare parts Maintenance, cleaning, disposal, spare parts Replacing the electrolyte solution and membrane head WTW delivers the probe ready for operation An exchange is necessary if:  the membrane is damaged, the leakage or Sens Reg message appears- ...
  • Page 20 Maintenance, cleaning, disposal, spare parts Caution For all maintenance work, disconnect the probe from the instrument! 1 Disconnect the probe from the instrument. 2 Screw off the membrane head. 3 Thoroughly rinse the probe head with deionized water.
  • Page 21 Maintenance, cleaning, disposal, spare parts 4 Carefully wipe and dry the counter electrode using a paper towel. 5 Moisten the new membrane with some drops of the ELY/A electrolyte solution. Warning Observe the warning on the ELY/A bottle!
  • Page 22 Maintenance, cleaning, disposal, spare parts 6 Fill the membrane head with electrolyte solution. Note Always use a new membrane head! 7 Remove air bubbles by careful knocking. 8 Rinse the probe head with electrolyte solution.
  • Page 23 Maintenance, cleaning, disposal, spare parts 9 Screw the WP 25 membrane head on the shaft. Hold the probe inclined. Excess electrolyte solution is pressed out at the vent. Vent (upper part) 10 The filling should be free of air bubbles. Small air bubbles do not interfere.
  • Page 24 Maintenance, cleaning, disposal, spare parts 11 Refill only in case of: – Big air bubbles – Air bubbles at the gold cathode – Measuring with high water pressure – Probe cannot be calibrated or is sensitive to knocking. Note After being connected to the instrument for approx. 60 minutes the probe is ready for operation, then it is essential to recalibrate the probe.

  • Page 25: Cleaning The Electrodes

    Maintenance, cleaning, disposal, spare parts Cleaning the electrodes Note Counter electrode and reference electrodes always show a coloring. This is necessary for the operation of the probe. It is not a contamination. Cleaning is only required if the slope is too high or too low (the probe cannot be calibrated), and if this cannot be remedied by replacing the membrane head and the electrolyte solution.
  • Page 26 Maintenance, cleaning, disposal, spare parts 3 Thoroughly rinse the probe head with deionized water.

  • Page 27: 4.2.1 Cleaning The Gold Working Electrode

    Maintenance, cleaning, disposal, spare parts 4.2.1 Cleaning the gold working electrode Moisten the cathode and the SF 300 grinding foil with deionized water. 1 Using the wet SF 300 grinding foil, polish impurities off the cathode under slight pressure. Caution Do not use normal grinding paper or glass fibre pen! 2 Thoroughly rinse the probe head with deionized water.

  • Page 28: 4.2.2 Cleaning The Silver Counter Electrode

    Maintenance, cleaning, disposal, spare parts 4.2.2 Cleaning the silver counter electrode The silver counter electrode can either be cleaned:  using the RA 600 cleaning cap or  in a glass beaker. 4.2.3 Cleaning the counter electrode using the RA 600 cleaning cap The RA 600 cleaning cap is available as an accessory, see chapter 6 R...
  • Page 29 Maintenance, cleaning, disposal, spare parts 3 Screw the cleaning cap on the probe instead of the membrane head. Caution Never grease or oil the inner O ring! 4 Remove the screw cap from the safety cap. 5 Fill the screw cap with RL-Ag/Oxi cleaning solution.
  • Page 30 Maintenance, cleaning, disposal, spare parts 6 Screw the safety cap with the probe on the screw cap. Caution Never immerse the reference electrode into the cleaning solution! The reference electrode might be destroyed and the probe defective. If the RA 600 is used correctly, however, there is no danger for the probe.
  • Page 31 Maintenance, cleaning, disposal, spare parts 9 Screw off the safety cap. 10 Thoroughly rinse the probe head and the electrode unit with deionized water several times. 11 Soak the probe head and the electrode unit in deionized water for at least one hour.
  • Page 32 Maintenance, cleaning, disposal, spare parts 12 Carefully shake off water drops. Note See section 4.3 R EFILLING THE MEMBRANE HEAD...

  • Page 33: Cleaning The Counter Electrode In The Glass Beaker

    Maintenance, cleaning, disposal, spare parts 4.2.4 Cleaning the counter electrode in the glass beaker 1 Screw off the membrane head. 2 Using a lint-free paper towel, wipe the counter electrode and carefully remove any loose coating. 3 Fill the glass beaker (150 mL, high shape) with approx.
  • Page 34 Maintenance, cleaning, disposal, spare parts 4 Put the probe in the stand. Immerse the electrode unit into the RL-AG/Oxi cleaning solution up to a little bit above the counter electrode. Caution Never immerse the reference electrode into the cleaning solution! The reference electrode might be destroyed and the probe defective-.
  • Page 35 Maintenance, cleaning, disposal, spare parts Soak in deionized water for at least one hour. 7 Carefully shake off water drops.

  • Page 36: Refilling The Membrane Head

    Maintenance, cleaning, disposal, spare parts Refilling the membrane head 1 Moisten the new membrane with some drops of the ELY/A electrolyte solution. Warning Observe the warning on the ELY/A bottle! 2 Fill the membrane head with electrolyte solution. Note Always use a new membrane head!
  • Page 37 Maintenance, cleaning, disposal, spare parts 3 Remove air bubbles by careful knocking. 4 Rinse the probe head with electrolyte solution. 5 Screw the WP 25 membrane head on the shaft. Hold the probe inclined. Excess electrolyte solution is pressed out at the vent. Vent (upper part)
  • Page 38 Maintenance, cleaning, disposal, spare parts 6 Connect the probe to the measuring instrument again. The probe is ready to operate after being connected to the instrument for approx. 60 minutes. Note After each refilling, it is essential to recalibrate the probe. Recommendation: For precision measurements, calibrate the probe the following day once again.

  • Page 39: Checking Whether The Probe Is Zero Current Free

    Maintenance, cleaning, disposal, spare parts Checking whether the probe is zero current free The probe is zero current free. Therefore, it is not possible to calibrate the probe in air free of oxygen. It is possible, however, to check whether the probe is zero current free according to DIN EN 25814/ISO 5814.

  • Page 40: Disposal

    Maintenance, cleaning, disposal, spare parts Disposal We recommend to dispose of the probe as electronic waste. Maintenance and spare parts Model Order no. Exchange membrane heads WP 25i/2 202 852 (2 pieces) Electrolyte solution ELY/A 205 212 (1 bottle with 50 mL) Cleaning solution for the RL-Ag/Oxi 205 200 silver counter electrode...

  • Page 41: What To Do If

    (the probe is in air) – No electrolyte in the – Replace the WP 25i membrane head membrane head – Cable defective – Send probe to WTW – Electronics defective – Send probe to WTW Probe cannot be Cause Remedy calibrated –...
  • Page 42 What to do if ... The probe has been Cause Remedy mechanically – Send probe to WTW damaged Measured values Cause Remedy too low – Membrane contaminated – Perform an exterior cleaning and calibration – Probe has not been according to the...
  • Page 43 - Connect the probe to the instrument and switch to the highest measuring range (0 - 600 %): If the display is > 1 digit: There is a shunt. Send the probe to WTW for repair.
  • Page 44 – There is a hole in the – Replace the membrane membrane head and recalibrate according to the operating manual, if necessary clean the electrodes Wrong temperature Cause Remedy display – Defective temperature – Send probe to WTW sensor...

  • Page 45: Recommended Accessories

    Recommended accessories Recommended accessories Model Order no. Mounting set EBST 700-DU 203 716 Mounting set EBS 700-DU 203 715 Flow-through D 702 203 738 armature Universal holder EH/U 170 109 320 Universal armatures UA 55 109 260 with handle UA130 109 261 UA-SO 109 263 V...
  • Page 46 Recommended accessories Electrode weight 109 232 (only for floater mounting or extremely strong current and/or turbulence) Note For further holders and simulators refer to the WTW-catalog.

  • Page 47: Technical Data

    Technical data Technical data General data ® TriOxmatic Cable length Probe types 1.5 m, 701-7 7 m, 701-15 15 m 701-SO customized lengths of up to 100 m Measuring Membrane covered amperometric probe with a 3 principle electrodes system potentiostatically operated; electrode with integrated preamplifier Electrolyte ELY/A...
  • Page 48 Technical data Membrane head: Material Membrane: Fluoroplastics Probe head: Isolator: Epoxy, PEEK Closing head: Shaft: VA steel 1.4571 Protection hood: Cable screw joint: VA steel 1.4571 Cable coating: PU (Polyurethane) Dimensions Shaft length 195.5 mm Shaft diameter 40 mm Membrane thickness 25 µm Cable length 1.5 m, 7 m, 15 m...

  • Page 49: Measuring Conditions

    Technical data Measuring conditions Measuring range 0 - 60 mg/L O ≈ 0 - 600 % saturation ( 0 - 1200 mbar pO Polarization time for initial commissioning or after replacing the electrolyte: at least 60 min; after short polarization breaks: 15 to 60 min depending on the duration of the break Temperature range Operation:...

  • Page 50: Characteristics When Delivered

    Technical data Fields of application Water and waste water control  Oxygen consumption test (e. g. BOD instruments)  Oxygen input measurements  Use in toximeters  Characteristics when delivered Slope - 3.75 mV/mbar; mean value at 20 °C Zero signal <...

  • Page 51: Electrical Data

    Technical data Electrical data Pin assignment Top view of the plug Pin Assignment Voltage maximum current + 6.5 V ... + 8.5 V < 1mA NTC (30kOhm) < 3.5 V < 0.15mA NTC (30kOhm) < 3.5 V < 0.15mA - 6.5 V ... - 8.5 V <...
  • Page 52 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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