View source for OroboPOS-Connector

{{Product
|description='''OroboPOS-Connector''' (blue POM), with male connection to [[OroboPOS]] sensor head (POS) and with cable and male plug fitting into [[O2k-Main Unit]].

Two units of this item are standard components of the [[O2k-Assembly Kit]] ([[O2k-Core]]), mounted on the [[OroboPOS-Holder]]s at the [[O2k-Main Unit]].
|product id=22200-01
|product type=O2k, O2k-Assembly Kit, OroboPOS
|info=[[O2k-Assembly Kit]], [http://www.oroboros.at/?O2k-Start O2k-Manual @OROBOROS]
|product image=[[Image:POS connector and cable connection.jpg|right|180px]]
}}
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 particular sensitive to damage by [[ESD]]. '''Therefore it is of special importance to follow the guidelines for ESD protection [[MiPNet14.01_ESD_Damage]] whenever handling a POS connector.'''

== Functions ==
The POS connector has several different functions:
* It mechanically presses the [[POS]] against the [[glass chamber]], ensuring a tight fit.
* It connects the [[POS]] electronically to the [[main unit]] transmitting the signal.
* In O2k Series A-C it also performs the current to voltage conversion / amplification. For Series D and upwards this function has been incorporated into the [[Main unit]]. For this reason POS connectors for Series A-C and for Series D are NOT interchangeable.

== Technical Service ==
Nearly all problems usually associated with the [[POS]] may in fact be caused by the POS connectors, e.g.
*unstable O2 signal
*unstable O2 flux
*high O2 signal at air saturation
*high O2 signal at zero oxygen


=== Troubleshooting procedure ===

Confirm the problem by doing a [[Sensor test]] in the absence of biological material

If no no problem was visible in the [[Sensor test]] check the following [[DatLab]] settings:
* [[Gain (O2 channel)]]
* [[POS calibration]]
* Scaling

If the problem is not visible when observing the [[Raw signal]] but is visible when observing the calibrated oxygen signal, then there is probable a problem with the [[POS calibration]].

If the problem was visible in the [[Sensor test]]:
* Proceed to [[ Locating a problem|Locate the Problem ]]
* If thereby the problem was confirmed to be caused the OroboPOS-Connector: Follow the instructions for cleaning and applying [[contact oil]] as described in the sensor service manual [http://www.oroboros.at/index.php?id=o2k-pos-service [MiPNet08.04]] and in more detail at [[Cleaning the POS connector]]. 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, or a new POS connector has to be applied. 
* If the problem was localized on an other component follow the instructions for this component. If you could not locate the problem contact OROBOROS Instruments.

=== OroboPOS-Connector Technical Service Pages ===
{{#ask: mainlabel=Title|[[Category:All]] | [[Technical service::POS connector]]| ?Technical service}}

{{#set: Technical service=POS connector|Technical service=O2 signal}}

[[Category:Technical service]]
[[Category:All]]


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