O2k-Open Support alert

O2k-Open Support alert - 2023

Currently Answered Questions from the »Oroboros Ecosystem Agenda«

Sep 2023

Sep- 11 Mo

Barometric pressure displaying as 0 kPa in the O2 calibration window?

In many cases, this can be solved by by switching off and unplugging the O2k for several minutes.
- »O2k-Barometric Pressure Transducer«
- communicated by »Schmitt Sabine« and »Grings Mateus«

Aug 2023

Aug- 28 Mo

Can I compare data sets recorded with different sensor gain settings?

Oxygen signals obtained after proper calibration are independent of the gain settings, therefore oxygen concentrations (and fluxes) can be compared, as long as the corresponding air and zero calibrations are applied.
- »Gain of the O2 channel«
- communicated by »Baglivo Eleonora« and »Leo Elettra«

Aug- 14 Mo

What do you do if values, symbols, and/or units are not correctly displayed in the DatLab software?

It is possible to retrieve the values, symbols and/or correct units by updating the Windows control panel settings.
- » Troubleshooting for problems with text in DatLab«
- communicated by »Cecatto Cristiane« and »Timon-Gomez Alba«

Jul 2023

Jul- 17 Mo

Are you planning to perform several measurements in one day using the same O2k-chamber?

To avoid any possible contamination by inhibitors in the subsequent measurements, the O2k-chamber needs to be cleaned each time with the standard protocol AfterUse or AfterUse_inhibitors.
- »O2k-cleaning - Sections 2.3 and 2.4«
- communicated by »Timon-Gomez Alba« and »Cecatto Cristiane«

May 2023

May- 09 Tu

Does your polarographic oxygen sensor (POS) need a deep clean?

A POS with a very dark anode might need several rounds of ammonia cleaning, possibly including prolonged exposure overnight to restore performance specifications.
- »POS service«
- communicated by »Cecatto Cristiane« and »Leo Elettra«

Mar 2023

Mar- 28 Tu

Unusual stirrer bar rotation?

A “jumping” stirrer or a slow rotation of the stirrer bar may indicate a problem either with the stirrer itself or with the cleaning of the glass chamber.
- »Stirrer bar - technical support«
- communicated by »Baglivo Eleonora« and »Grings Mateus«

Mar- 21 Tu

Did you know that a humid environment and/or liquid spillage may lead to a high raw POS signal [V]?

See how to clean and dry the electrical connections of the OroboPOS-Connector.
- »Cleaning the electrical connections«
- communicated by »Cecatto Cristiane« and »Baglivo Eleonora«

Feb 2023

Feb- 23 Th

Add catalase when measuring Complex IV (CIV) activity in permeabilized fibers (pfi)

Pfi have a high content of iron-containing proteins, which accelerate the autoxidation of tetramethyl-p-phenylenediamine (TMPD) in the CIV assay. Catalase prevents the accumulation of H₂O₂ generated by this autoxidation.
- »Chemical Background« and »Complex IV«
- communicated by »Cecatto Cristiane« and »Schmitt Sabine«

Feb- 16 Th

Do you observe simultaneous fluctuations in the O₂ slope neg. and the Peltier power?

This can indicate fluctuations in the room temperature or electrical supply. Controlling the temperature or changing the electrical supply may resolve this problem.
- »Troubleshooting«
- communicated by »Cecatto Cristiane« and »Schmitt Sabine«