TA Instruments DSC Q Series, Руководство по началу работы

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DSC Q Series Getting Started Guide
54
Running a DSC Experiment
CAUTION: Drying out the DSC cell may be needed, if it has been exposed to humid
conditions. It is important to be certain that the instrument ground is adequately
connected to the facilities ground for safe operation.
Run the "Cell/Cooler Conditioning" test template to dry out the cell:
1 External Event Off
2 Equilibrate at 75°C
3 Isothermal for 120.00 min.
Experimental Procedure
All of your DSC experiments will have the following general outline. In some cases, not all of these steps will
be performed. See the instrument control software online help for anything not covered in this manual.
• Attaching and setting up external accessories as required ( e.g ., purge gas, cooling accessory). If you are
planning to run subambient experiments with the LNCS, use helium as the purge gas. If you are using the
LNCS for rapid cooling above ambient (
i.e ., isothermal crystallization), then nitrogen may be used as a purge
gas. If you are using the RCS 90 or RCS 40 for cooling, nitrogen may be used as a purge gas.
NOTE: Please make sure that you run your experiments with the same gas that you used to
calibrate the system. For example, if you calibrate using nitrogen, make your runs with nitrogen.
• Selecting and preparing a sample. This involves preparing a sample of the appropriate size and weight,
selecting the pan type and material, and encapsulating the sample in the pan. For details refer to the online
documentation.
• Loading the sample pan (and a similarly prepared empty reference pan) into the cell or onto the Autosampler
tray.
• Entering experiment and procedure information through the TA controller, this includes both sample and
instrument information.
• Starting the experiment.