Oxygold G DO sensor Maintenance

How to startup a new sensor, or how to replace the Membrane Cap and Electrolyte.

 

Startup of a new Oxygold G sensor:

The Oxygold G sensor is shipped dry with a protective cap over the end of the Membrane Cartridge.

CAUTION: The electrolyte should not be allowed to touch your skin or clothing. Use Personal Protective Equipment such as gloves and protective eyeware when working with the electrolyte.

 

1. Inspect the new sensor for damage during shipment. 

2. Remove the membrane cartridge and rinse it once with a small amount of the OXYGOLD G electrolyte. 

3. Using the installed pipette dispense 1.5 ml. of the OXYGOLD G electrolyte into the membrane cartridge.

4. Maintain the membrane cartridge in a vertical position to prevent spilling the electrolyte, and insert the sensor shaft and screw it in place. Rinse off any electrolyte that may remain on the exterior of the sensor. 

5. The sensor must now polarize to remove the oxygen that is dissolved in the electrolyte. This can be accomplished by connecting the sensor to a transmitter and turning on the power. It will take 2 hours for the polarization to be completed. Normally the next step will be to perform an air calibration so you should leave the sensor in air during this polarization period. 

6. Perform an air calibration. 

Replacing the membrane cartridge and electrolyte

1. Remove the membrane cartridge and discard any remaining electrolyte. Do not attempt to polish or even wipe the anode and cathode of the sensor. 

2. If the membrane cartridge is being replaced discard the old cartridge and follow the steps below with the new cartridge. If it is being reused, follow the steps below with the old cartridge. 

3. Rinse the membrane cartridge once with a small amount of the OXYGOLD G electrolyte.

4. Using the installed pipette dispense 1.5 ml. of the OXYGOLD G electrolyte into the membrane cartridge.

5. Maintain the membrane cartridge in a vertical position to prevent spilling the electrolyte, and insert the sensor shaft and screw it in place. Rinse off any electrolyte that may remain on the exterior of the sensor. 

6. The sensor must now polarize to remove the oxygen that is dissolved in the electrolyte. This can be accomplished by connecting the sensor to a transmitter and turning on the power. It will take 2 hours for the polarization to be completed. Normally the next step will be to perform an air calibration so you should leave the sensor in air during this polarization period. 

7. Perform an air calibration. 

We also have a video you can watch of the OxyGold G startup process. Click the link at the top of this page.