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| == Very low temperatures ==
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| '''Question:''' Is it possible to use the oxygraph with a chamber temperature of 0 °C?
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| Our system is specified down to 4 °C at 25 deg room temperature and and down to 2 °C at "lower ambient temperature", see
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| [http://www.oroboros.at/index.php?id=o2k-specifications| specifications].
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| Lower ambient temperature does not necessary mean a "cool room". For the 2 deg, an acclimatised room usually will be enough.
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| 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.
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| 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.
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| '''Update for O2k Series E:'''
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| 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:
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| 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
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| {{#set:Technical service=Main unit}}
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| __SHOWFACTBOX__
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| {{Technical service}}
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Latest revision as of 09:00, 6 August 2017
Previous Product ID 21020
