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56 . DSC 4000 Installation and Hardware Guide
Calibration of the DSC 4000
The DSC 4000 has been calibrated at the factory for both temperature and heat flow. Under
normal conditions, the analyzer does not need temperature recalibration. As a result of the
use of high-precision Pt100 sensors, the temperature accuracy does not vary over the
temperature range and remains constant for long periods of time.
We recommend that the temperature calibration and heat flow calibration be checked using
the precrimped samples of indium and zinc before obtaining data. We also recommend that
you perform calibrations in the following order:
•
Temperature Calibration
Heat Flow Calibration
•
Temperature Calibration
The DSC 4000 has been calibrated at the factory for temperature. Under normal conditions
the DSC 4000 does not need temperature calibration. As a result of the use of high-precision
sensors, the temperature accuracy does not vary over the temperature range and remains
constant for long periods of time.
NOTE: It is recommended that a baseline correction be performed before temperature
calibration.
At least two measured onset temperatures are necessary to calibrate the DSC 4000. The
calibration materials selected must have at least a 50 °C temperature difference in their
theoretical Onset temperatures. Indium and zinc are the recommended calibration materials.
However, other reference materials can be used to calibrate the analyzer but they must be
pure, for example, distilled water.
To calibrate the temperature of the DSC 4000:
1. While using the Instrument Viewer or the Method Editor in the Pyris software, select
Calibrate from the View menu.
The Calibration window is displayed.
2. Restore the default temperature calibration by selecting Temperature from the Restore
menu. If you are going to perform a heat flow calibration, restore all default calibration
values by selecting the All command.
3. Click the Save and Apply button in the Calibration window to send the default values
to the analyzer and save the current calibration file. The Save As dialog box appears.
Click OK to save the default file.
4. Select Close to close the Calibration window and begin using the new calibration
values.
After you have performed these steps, go on to the following topics to complete the
temperature calibration of the DSC 4000:
Perform Indium and Zinc Runs
•
Perform a Peak Area with Onset Calculation
•
•
Perform a Temperature Calibration
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