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do_issues [31/03/2015 12:26] pieter |
do_issues [31/03/2015 12:31] pieter [Maintenance] |
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Check the correct position of the O-ring, insert the capsule and push it to its final position using the supplied stick, check the membrane. | Check the correct position of the O-ring, insert the capsule and push it to its final position using the supplied stick, check the membrane. | ||
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===== Zero point ===== | ===== Zero point ===== | ||
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Saturate distilled water in a vessel by purging air in it for approximately 20 minutes to create 100% air saturation. Perform the saturation of the solution under operating pressure. Allow the output signal to stabilise. Follow the instructions of the meter to calibrate the electrode at 100% saturation. | Saturate distilled water in a vessel by purging air in it for approximately 20 minutes to create 100% air saturation. Perform the saturation of the solution under operating pressure. Allow the output signal to stabilise. Follow the instructions of the meter to calibrate the electrode at 100% saturation. | ||
- | ===== Maintenance ===== | ||
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- | The electrode requires only little maintenance but should be checked regularly. Normal cleaning/ | ||
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- | After the electrode has been used for a period of time, the residual current may rise (see Zero point). To reduce the residual current, the following cleaning method is recommended. | ||
- | - Carefully unscrew the membrane cap from the body. | ||
- | - Rinse the inside of the membrane cap with DI water. | ||
- | - Soak the Lead anode in 0.1N HCl (Do not use aqua regia!) for 15 to 20 minutes. Rinse thoroughly with DI water, blot dry with tissue paper. | ||
- | - Mix soap, water and a few drops of ammonia together in a container. Brush the cleaning solution onto the tarnished Platinum with care. Use an old toothbrush or other soft-bristled brush. Work gently to get rid of the tarnish. | ||
- | - Rinse the soaked portions thoroughly with DI water. Blot dry with tissue paper. | ||
- | - Reassemble the electrode according to the method described in Start Up. | ||