In OpenLab, is there a setting that will automatically stop a sequence if the GC oven temp/pressure falls below the required parameters mid-run?

In OpenLab, is there a setting that will automatically stop a sequence if the GC oven temp/pressure falls below the required parameters mid-run? We have been experiencing this, and our Gerstel autosampler will continue to inject, resulting in lost sample and no data.

  • Some additional details might help  Which model of GC are you using and what is the oven ramp rate?  Also is it a 120 volt system or a 240 volt system?  Since you don't describe problems at the begging or end of the GC run, I suspect what you are seeing is the GC actual temperature lagging behind the temperature setpoint during a ramp. 

    GCs have maximum ramp rates and the rates change depending on which temperature zone you are in.  The maximum ramp rate is also influenced by the operating voltage of the GC.  The 240 volt ovens, in the US known as Fast Ovens, have faster oven ramp rates than 120 volt systems.  I have seen cases where people bring a GC method from a 240 volt GC and try to run it on a 120 volt GC, only to find the oven can't keep up with the ramp rate.

    If you can supply the GC model type, with the volts it uses, along with the GC oven parameters you are using, we may be able to offer some suggestions to avoid needing the mid run abort at all.  The back of the GC near the power cord has a sticker with the voltage of the GC.

  • Hi kuenvirolab,

    The GC should stop when any parameter is in a not ready state for a certain period of time. It looks like the issue is with the Gertsal continuing to inject and triggering the run. It maybe worthwhile checking with Gerstel to see if they have a solution that monitors the not ready on the remote cable. 

    Regards

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