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

Revision as of 08:58, 6 August 2017

Previous Product ID 21020

Talk:O2k-Peltier Temperature Control

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

Very low temperatures

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

The O2k is specified for a chamber temperature 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 "cold room". For a chamber temperature of 2 °C, an air conditioned room is sufficient.

It is possible to reach a chamber temperature of 0 °C at low ambient temperature. For this purpose, the O2k can be exposed to ambient 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, some means of humidity control should be used.

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, a "cold room" would probably be necessary for longer experiments.

Update for O2k-Series E

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

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

@@ Line 5: / Line 5: @@
 == Very low temperatures ==
-'''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 for a chamber temperature down to 4 °C at 25 °C room temperature and down to 2 °C at "lower ambient temperature", see
+:::: The O2k is specified for a chamber temperature down to 4 °C at 25 °C room temperature and down to 2 °C at "lower ambient temperature", see [[MiPNet06.05 Specifications| specifications]].
-[[MiPNet06.05 Specifications| specifications]].
+:::: Lower ambient temperature does not necessarily mean a "cold room". For a chamber temperature of 2 °C, an air conditioned room is sufficient.
-Lower ambient temperature does not necessarily mean a "cool room". For a chamber temperature of 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 reach a chamber temperature of 0 °C at a "lower ambient temperature". In general, however, this  may require a "cool room". For this purpose, the main unit itself can be  exposed to ambient 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, some means of humidity control should be used.
-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, a "cool room" would probably be necessary for longer experiments.
-'''Update for O2k Series E:'''
+:::: It is possible to reach a chamber temperature of 0 °C at low ambient temperature. For this purpose, the O2k can be exposed to ambient 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, some means of humidity control should be used.
-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 M|Fasching Mario]] 14:39, 4 February 2013 (CET)
+:::: 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, a "cold room" would probably be necessary for longer experiments.
-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)
+::: '''Update for O2k-Series E'''
+:::: O2k-Series E has a more efficient temperature management system. Therefore, the experiment described above was repeated with an O2k-Series E. In this case it was not necessary to reduce the room temperature. [[Fasching M|Fasching Mario]] 14:39, 4 February 2013 (CET)
+:::: Details: At room temperature of 21.1 °C a stable Peltier power of about -83% was reached after about 1:05 h from setting the block  temp. from 37 °C to 0 °C. [[User:Capek Ondrej|Capek Ondrej]] 14:36, 4 February 2013 (CET)