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Related Manuals for wtw ConOx-3
Summary of Contents for wtw ConOx-3
- Page 2 Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions. © Copyright Weilheim 2004, WTW GmbH Reprinting - even as excerpts - is only allowed with the explicit written authorization of WTW GmbH, Weilheim. Printed in Germany.
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Page 3: Table Of Contents
ConOx Contents ConOx - List of contents Overview ......... 28 Structure and function . -
Page 4: Overview
Overview ConOx Overview Structure and function The ConOx is a modular sensor for conductivity, dissolved oxygen (DO) and temperature. It consists of two basic components: l Conductivity basic module, according to the quadripole measuring princi- ple, with integrated temperature sensor l Removable dissolved oxygen module, according to the galvanic measur- ing principle Structure of the... -
Page 5: Instrument Identification
Applications in water laboratories Instrument identification A series number is printed on both ConOx modules. Keep these numbers ready if you have questions to ask the WTW service department. The series numbers contain the following information: Conductivity basic The number is printed on the shaft. -
Page 6: Safety
Safety ConOx Safety This operating manual contains special instructions that must be followed during the operation of the sensor. Always keep this operating manual in the vicinity of the sensor. Special user The membrane cap of the DO module is filled with a small amount of an qualifications alkaline electrolyte solution. - Page 7 ConOx Commissioning 3.1.2 Scope of delivery of the conductivity basic module l Conductivity basic module l 1 closing cap, mounted on the conductivity basic module l Operating manual for ConOx 3.1.3 Scope of delivery of the DO module l DO module, filled with electrolyte solution and operable l 1 closing cap, mounted on the DO module l 1 exchange membrane cap, WP 90 l Polishing strip, SF 300...
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Page 8: Getting The Sensor Ready For Measuring
Commissioning ConOx Getting the sensor ready for measuring 3.2.1 Measurements with the conductivity basic module Make sure that the plug connection is tightly closed by the closing cap. When mounted, the closing cap (1) must be screwed on up to the stop. Before screwing on the closing cap, check the following points: l The sealing (2) must be clean and evenly positioned in the groove. -
Page 9: Measuring / Operation
ConOx Measuring / Operation Unscrewing the Unscrew the cap nut and remove the DO module from the conductivity basic DO module module. Caution Inappropriate handling can lead to the release of electrolyte solution. When unscrewing the DO module only turn the cap nut (not the membrane cap!). -
Page 10: Storage
Maintenance, cleaning, replacement ConOx Storage Always store the sensor with the DO module in the calibration vessel at a temperature of 0 to +50 °C. Make sure that the sponge in the calibration ves- sel is always moist. Storage in the calibration vessel, ®... -
Page 11: Outside Cleaning
ConOx Maintenance, cleaning, replacement Caution The RL/G cleaning solution irritates eyes and skin. When dealing with the RL/G cleaning solution, observe the following points: l During working activities, always wear suitable protective gloves and protective goggles/face shield. l If it comes into contact with the skin, rinse thoroughly with water and immediately change contaminated clothing. -
Page 12: Do Module: Changing The Electrolyte Solution And Membrane Cap
34. MAINTENANCE INSTRUCTIONS General WTW delivers the DO module ready to use (see section 3). The electrolyte information solution and the membrane cap must only be replaced if: l a calibration error occurs and the membrane is heavily contaminated l the membrane is damaged l the electrolyte solution is exhausted. - Page 13 ConOx 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 mem- brane cap. Additionally, you can prevent air bubbles by throwing the first filling away and refilling the membrane cap.
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Page 14: Do Module: Cleaning The Electrodes
Maintenance, cleaning, replacement ConOx DO module: Cleaning the electrodes Caution Before starting to work with the sensor, please note the G ENERAL on page 34. MAINTENANCE INSTRUCTIONS General Cleaning is only required in cases of slopes too small or too large (sensor information cannot be calibrated) that cannot be resolved by changing the membrane cap and electrolyte solution. - Page 15 ConOx 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.
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Page 16: Checking The Do Module For Freedom From Zero-Current
Maintenance, cleaning, replacement ConOx Note For measurements under high pressure the filling must be completely free of air bubbles. Readiness to After approx. 30 to 50 minutes, the sensor is ready for operation. Subse- measure quently calibrate the sensor. Note If you want to measure very low DO concentrations (<... -
Page 17: Disposal
ConOx Maintenance, cleaning, replacement Disposal Caution The ELY/G electrolyte solution irritates eyes and skin. When dealing with the ELY/G electrolyte solution, observe the following points: l During working activities, always wear suitable protective gloves and protective goggles/face shield. l If it comes into contact with the skin, rinse thoroughly with water and immediately change contaminated clothing. -
Page 18: What To Do If
What to do if... ConOx What to do if... Error symptoms of DO measurement Error symptom Cause Remedy The sensor is in the air – No connection between – Check connection between and the display shows measuring instrument and sensor measuring instrument and sensor 0.0 mg/l or 0 % O –... -
Page 19: Technical Data
ConOx Technical data Technical data Conductivity basic module General features Measuring principle Four-electrode measurement integrated NTC 30 (30 k W / 25 °C) Cell constant 0.475 cm ±1.5 % Temperature sensor Dimensions (in mm) Weight approx. 135 g (without DO module, with 1.5 m cable) Materials Shaft Epoxy... -
Page 20: Dissolved Oxygen (Do) Module
Technical data ConOx Pressure Sensor with closed plug IP 68 (3 x 10 Pa or 3 bar) resistance connection Cable plug IP 67 (when plugged in) The ConOx meets the requirements according to article 3(3) of the 97/23/EC directive ("Pressure equipment directive"). 1 m S/cm ... - Page 21 ConOx Technical data Materials Working electrode Gold Counter electrode Lead – Membrane cap – Cap nut Membrane FEP, 13 µ m – Sensor head Epoxy, PEEK – Plug connection PEEK Screw thread base Stainless steel 1.4571 Seals FPM (Viton) Closing cap Plug connection Plug type 3-pole, watertight plug connection with cap nut,...
- Page 22 Technical data ConOx Characteristic data Zero signal < 0.1 % of the saturation value on delivery Response time at 20 °C (90 % of the final value display after) < 10 s (95 % of the final value display after) < 16 s (99 % of the final value display after) <...
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Page 23: Wear Parts And Accessories
A 325/K or A 325/S Battery stirrer for depth measurements - only BR 325 203 826 in conjunction with A 325/K or A 325/S Note For further accessories, refer to the WTW catalog or the Internet. - Page 24 Wear parts and accessories ConOx...