Related Manuals for wtw ConOx
Summary of Contents for wtw ConOx
- Page 1 Operating manual ConOx Combined Conductivity and Dissolved Oxygen Sensor ba75383e04 04/2009...
- Page 2 ConOx © Copyright Weilheim 2009, WTW GmbH Reprinting - even as excerpts - is only allowed with the explicit written authorization of WTW GmbH, Weilheim. Printed in Germany. ba75383e04 04/2009...
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Page 3: Table Of Contents
ConOx Contents 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: Conductivity basic module, according to the quadripole measuring princi- ple, with integrated temperature sensor Removable dissolved oxygen module, according to the galvanic measur-... -
Page 5: Instrument Identification
Ground water measurements 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
Commissioning Scopes of delivery 3.1.1 Scope of delivery of the ConOx ConOx combination conductivity and DO sensor, DO module filled with electrolyte solution and ready to use 1 closing cap for conductivity basic module... - Page 7 3.1.2 Scope of delivery of the conductivity basic module Conductivity basic module 1 closing cap, mounted on the conductivity basic module Operating manual for ConOx 3.1.3 Scope of delivery of the DO module DO module, filled with electrolyte solution and operable...
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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. -
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
Measuring / Operation ConOx Storage Always store the sensor with the DO module in the calibration and storage vessel at a temperature of 0 ... +50 °C (32 ... 122 °F). Make sure that the sponge in the calibration and storage vessel is always moist. -
Page 11: Maintenance, Cleaning, Replacement
ConOx Maintenance, cleaning, replacement Maintenance, cleaning, replacement General maintenance instructions For your safety Note the following safety instructions when handling electrolyte and cleaning solutions: CAUTION The ELY/G electrolyte solution and RL-G cleaning solution irritate the eyes and skin. Note the following points when dealing with these... -
Page 12: Do Module: Changing The Electrolyte Solution And Membrane Cap
35. 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: a calibration error occurs and the membrane is heavily contaminated the membrane is damaged 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 35. MAINTENANCE INSTRUCTIONS General Cleaning is only required in cases of slopes too small or too large (sensor... - 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: During working activities, always wear suitable protective gloves and protective goggles/face shield. 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 Cell constant 0.475 cm ±1.5 % Temperature sensor Integrated NTC 30 (30 k at 25 °C / 77 °F) Dimensions 187.5 (in mm) 15.3 17.5 21.7 Weight approx. -
Page 20: Dissolved Oxygen (Do) Module
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"). Measurement Conductivity measuring 1 S/cm ... 2 S/cm conditions... - Page 21 ConOx Technical data Materials Working electrode Gold Counter electrode Lead – Membrane cap – Cap nut FEP, 13 μm Membrane – Sensor head Epoxy, PEEK – Plug connection PEEK Screw thread base Stainless steel 1.4571 Seals FPM (Viton) Closing cap...
- 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 (68 °F) (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. ba75383e04 04/2009... - Page 24 Wear parts and accessories ConOx ba75383e04 04/2009...