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| {{Technical service}}
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| __TOC__
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| For detailed information see 'Cleaning of the Electrical Connection' in the POS Service manual [[MiPNet08.04]].
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| The two electronic connections of the POS connector (to the [[POS]] and to the [[Main unit]]) make a POS connector that has been disconnected from the [[POS]] or from the [[Main unit]] or from both particularly sensitive to damage by [[ESD]]. '''It is therefore of primary importance to follow the guidelines for ESD protection [[MiPNet14.1]] whenever handling a POS connector.'''
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| ==Cleaning the electrical connection ==
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| Unscrew the [[POS]] and check both sides of the electrical connection (the gold pin and thread both on the POS and on the [[POS connector (technical service)|POS connector)]]. Remove any contamination such as grease and moister with a fine paper cloth. Soak a paper cloth in ethanol and clean the gold pin and threads. If the gold pin and thread on the POS connector are discolored or stained repeat cleaning with a paper towel soaked in ethanol: Continue cleaning until a fresh paper towel stays clean!
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| Finally, apply a drop of [[contact oil]] (you can find a small of bottle contact oil in your accessories box) to each of the golden pins and threads on POS connector and POS.
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| If you have also done a [[Sensor service]] or changed the POS membranes allow the oxygraph to run over night before repeating the Sensor test. If all service precautions fail to solve the problem, a new POS connector has to be applied.
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| ==Cleaning the spring mechanism==
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| ##From the outside media or other## spills may get into the mechanical part of the POS connector ##making the spring mechanism hard to work##. Therefore, the outside of the POS connector should be cleaned with pure water from time to time.
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| Apply a POS to the POS connector and make sure its seal (to the connector) is tight. Leave the POS connector attached to the oxygraph main unit or make sure that the plug, which connects the POS connector to the main unit, does not get wet (parafilm, 'hiding' the cable in your sleeves,...).
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| This will ensure that only the outside of the POS connector is touched by water. Then rinse the blue plastic of the connector with pure water, ##working the spring loaded handle (like when inserting the connector into the chamber) several times##. This will dissolve any media stuck in the mechanical part of the POS connector.
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| {{#set: Technical service=POS connector|Technical service=O2 signal}}
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| [[Category:Technical service]]
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