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Difference between revisions of "Oxygen sensor test"

From Bioblast
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{{Technical support}}
{{Technical support}}


* '''The O2 sensor test is described as an [[OroboPOS]]''' standard operating procedure: '''Polarographic oxygen sensors: calibration, accuracy and quality control SOP.''' Β»[[MiPNet06.03 POS-Calibration-SOP]]Β«


__TOC__


'''The O2 sensor test is described as an [[OroboPOS]]''' standard operating procedure: '''Polarographic oxygen sensors: calibration, accuracy and quality control SOP.''' Β»[[MiPNet06.03 POS-Calibration-SOP]]Β«
__TOC__


== When should an O2-sensor test be performed? ==
== When should an O2-sensor test be performed? ==
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* Zero oxygen calibration: from time to time over weeks; bracketing zero oxygen calibrations when working at low oxygen.
* Zero oxygen calibration: from time to time over weeks; bracketing zero oxygen calibrations when working at low oxygen.
* After application of a new membrane and O2-sensor service: In some cases, the signal of the OroboPOS improves (higher signal stability, less noise, shorter response time), when the O2k remains switched on over night (O2k-Chambers filled with 70% EtOH). Β 
* After application of a new membrane and O2-sensor service: In some cases, the signal of the OroboPOS improves (higher signal stability, less noise, shorter response time), when the O2k remains switched on over night (O2k-Chambers filled with 70% EtOH). Β 
* When there is any doubt about instrumental performance.
* During troubleshooting, particularly when [[switching components]] between the two chambers, a quick sensor test is performed after each step (stirrer test, sensor signal).
* During troubleshooting when [[switching components]] between the two chambers, a quick sensor test is performed after each step (stirrer test, sensor signal).


Β  Β 
Β  Β 
== Evaluation of an O2 sensor test ==
== Key words ==


Most parameters are best viewed by observing the [[Raw Signal]]. It will be helpful to compare the obtained test with the test of a functioning system, e.g. from the [http://www.oroboros.at/index.php?id=sensor_test DatLab demo file].
* [[Raw Signal at air saturation]]
* [[Signal stability]] at air saturation
* [[Response time of the POS]]
* Raw signal at zero oxygen ([[zero current]])
* [[Signal stability]] at zero oxygen


Informations gained by the sensor test include:
Β 
[[Raw Signal at air saturation]]
Β 
[[Signal stability]] at air saturation
Β 
[[Flux at open chamber]]
Β 
[[Response time of the POS]]
Β 
[[Flux at closed chamber near to air saturation]]
Β 
Raw signal at zero oxygen ([[zero current]])
Β 
[[Signal stability]] at zero oxygen
Β 
== Consequences of a Sensor test ==
Β 
Hardware problems are detected by assessing the parameters listed above in 'Evaluation of a Sensor test'.
Β 
If a hardware problem was observed in a 'stand alone' sensor test, please follow the link for the problematic parameter. Frequently it will be necessary to find the faulty component by [[locating a problem]].
Β 
If a sensor test was already performed as part of [[locating a problem]] the information in which chamber of the oxygraph the problem appeared will be used in the further process of [[locating a problem]].


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

Revision as of 00:40, 16 May 2015


                  


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Oxygen sensor test



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The O2 sensor test is described as an OroboPOS standard operating procedure: Polarographic oxygen sensors: calibration, accuracy and quality control SOP. Β»MiPNet06.03 POS-Calibration-SOPΒ«

When should an O2-sensor test be performed?

  • After switching on the O2k, every day: air calibration and stirrer test.
  • Zero oxygen calibration: from time to time over weeks; bracketing zero oxygen calibrations when working at low oxygen.
  • After application of a new membrane and O2-sensor service: In some cases, the signal of the OroboPOS improves (higher signal stability, less noise, shorter response time), when the O2k remains switched on over night (O2k-Chambers filled with 70% EtOH).
  • During troubleshooting, particularly when switching components between the two chambers, a quick sensor test is performed after each step (stirrer test, sensor signal).


Key words


... more about "Oxygen sensor test"
O2 sensor +, POS connector +, O2 signal +, Main unit +  and Performance test +