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Difference between revisions of "Talk:O2k-Peltier Temperature Control"

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{{Technical support}}
{{Technical support}}
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== Very low temperatures ==
'''Question:''' Is it possible to use the oxygraph with a chamber temperature of 0 °C?
##Our system is specified down to 4 °C at 25 deg room temperature and down to 2 °C at "lower ambient temperature", see
[http://www.oroboros.at/index.php?id=o2k-specifications| specifications].##
A room with lower temperature of the air does not necessarily mean to be a "cool room". For the 2 deg, an acclimatised room is commonly enough.
Even though we can only guarantee the working of the instrument within these  limits entirely, it is still possible to go to 0°C. This requires a "cool room" though. For this purpose the main unit itself can be exposed to temperatures down to just above 0°C (all the electronic  components are rated at least down to 0°C but obviously 0°C room  temperature has to be avoided due to condensation concerns). Also of  course for very low room temperatures above 0 deg humidity has to be  controlled somehow.
We did a quick test today and could reach 0°C  chamber temperature quite easily at a room temperature of about 14 °C.  To keep this temperature stable the cooling power of the Peltier element  was already working at 95% of maximum, so some kind of cool room will  probable be necessary.
'''Update for O2k Series E:'''
Because Series E Oxygraphs have a more efficient temperature management system the experiment described above was repeated with a Series E O2k. In this case it was not necessary to reduce the room temperature. [[User:Fasching Mario|Fasching Mario]] 14:39, 4 February 2013 (CET)
Details: O2K - 0°C block temp.  - stable Peltier power was reached after about 1:05 h from setting block  temp. from stable 37°C to 0°C. - stable Peltier power was about -83 %. - room temperature was 21.1°C [[User:Capek Ondrej|Capek Ondrej]] 14:36, 4 February 2013 (CET)
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[[Category:Technical service]]


Previous Product ID 21020
Previous Product ID 21020
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'''Question:''' Is it possible to use the oxygraph with a chamber temperature of 0 °C?
'''Question:''' Is it possible to use the oxygraph with a chamber temperature of 0 °C?


Our system is specified down to 4 °C at 25 deg room temperature and and down to 2 °C at "lower ambient temperature", see
Our system is specified down to 4 °C at 25 °C room temperature and down to 2 °C at "lower ambient temperature", see
[http://www.oroboros.at/index.php?id=o2k-specifications| specifications].
[http://www.oroboros.at/index.php?id=o2k-specifications| specifications].
Lower ambient temperature does not necessary mean a "cool room". For the 2 deg, an acclimatised room usually will be enough.
Lower ambient temperature does not necessarily mean a "cool room". For 2 °C, an air conditioned room will usually suffice.
While we can only guarantee the working of the instrument within these  limits, it is possible to go to 0°C and has been done. In general, this  may require a "cool room". To this purpose the main unit itself can be  exposed to temperatures  down to just above 0°C (all the electronic  components are rated at least down to 0°C but obviously 0°C room  temperature has to be avoided due to condensation concerns). Also of  course for very low room temperatures above 0 deg humidity has to be controlled somehow.
While we can only guarantee the working of the instrument within these  limits, it has been shown to be possible to go successfully to 0 °C. In general, this  may require a "cool room". For this purpose, the main unit itself can be  exposed to temperatures  down to just above 0°C (all the electronic  components are rated at least down to 0 °C but 0 °C room  temperature should be avoided due to condensation concerns). Also, for very low room temperatures above 0 °C, humidity should be controlled by some means.
We did a quick test today and could reach 0°C  chamber temperature quite easily at a room temperature of about 14 °C.  To keep this temperature stable the cooling power of the Peltier element was already working at 95% of maximum, so some kind of cool room will  probable be necessary.
We recently performed  a short test and were able to reach 0 °C chamber temperature quite easily at a room temperature of about 14 °C.  In order to maintain this temperature, the cooling power of the Peltier element reached 95% of maximum. Thus, some form of cool room would probably be necessary for longer experiments.


'''Update for O2k Series E:'''
'''Update for O2k Series E:'''

Revision as of 16:52, 23 May 2015

Previous Product ID 21020


                  


O2k-Open Support

Talk:O2k-Peltier Temperature Control



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MitoPedia O2k and high-resolution respirometry: O2k-Open Support 



Previous Product ID 21020 Template:Technical service


Very low temperatures

Question: Is it possible to use the oxygraph with a chamber temperature of 0 °C?

Our system is specified down to 4 °C at 25 °C room temperature and down to 2 °C at "lower ambient temperature", see specifications. Lower ambient temperature does not necessarily mean a "cool room". For 2 °C, an air conditioned room will usually suffice. While we can only guarantee the working of the instrument within these limits, it has been shown to be possible to go successfully to 0 °C. In general, this may require a "cool room". For this purpose, the main unit itself can be exposed to temperatures down to just above 0°C (all the electronic components are rated at least down to 0 °C but 0 °C room temperature should be avoided due to condensation concerns). Also, for very low room temperatures above 0 °C, humidity should be controlled by some means. We recently performed a short test and were able to reach 0 °C chamber temperature quite easily at a room temperature of about 14 °C. In order to maintain this temperature, the cooling power of the Peltier element reached 95% of maximum. Thus, some form of cool room would probably be necessary for longer experiments.

Update for O2k Series E: Because Series E Oxygraphs have a more efficient temperature management system the experiment described above was repeated with a Series E O2k. In this case it was not necessary to reduce the room temperature. Fasching Mario 14:39, 4 February 2013 (CET)

Details: O2K - 0°C block temp. - stable Peltier power was reached after about 1:05 h from setting block temp. from stable 37°C to 0°C. - stable Peltier power was about -83 %. - room temperature was 21.1°C Capek Ondrej 14:36, 4 February 2013 (CET)