PerkinElmer TGA 8000, Инструкция по установке и эксплуатации оборудования

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48 . TGA 8000 Installation and Hardware Guide
7. Click Begin Calibration.
A dialog box appears with instructions to remove anything in the sample pan. For the
autosampler system, remove any sample from crucible “1”. The autosampler should
be in the Safe position.
8. Follow the instructions in the dialog box, then click OK. The analyzer is tared for a
zero reading.
For the autosampler system, after accepting the reading, the crucible is unloaded
and the furnace is lowered. After approximately 30 seconds, the autosampler rotates
the tray so that position 1 is easily accessible.
9. When prompted, place and center the calibration weight in the sample pan and click
the OK button. The value of the calibration weight is read and displayed in the dialog
box. Click OK to accept the reading when the weight is stable.
For the autosampler, place the reference weight in crucible 1 and click OK. The value
of the calibration weight is read and displayed. When the signal settles, click OK to
accept the reading. The furnace goes to the Cool position and the crucible is
returned to the tray.
10. The just measured value is automatically displayed in the Measured field. Click the
Save & Apply button to send the new calibration value to the analyzer and save the
calibration file.
11. Click the Close button to exit the Calibration window.
The weight calibration is complete.
Performing the Temperature Calibration
The temperature calibration is performed for a TGA 8000 with or without an autosampler.
Perform the procedure below to calibrate the TGA for temperature.
NOTE: Prior to collecting the data to be used for temperature calibration as described below you
should open a calibration file which has the temperature calibration parameters set to their
default values, or you should go to the Restore menu item in Calibrate and restore the
temperature calibration.
For a temperature calibration use the magnetic standards of test metals Alumel, Nickel,
Perkalloy, and Iron supplied in the Spares kit (P/N N5320026). For calibrated analysis above
1000 °C substitute cobalt for one of the other standards; for example, check colbalt and
uncheck iron. The calibration runs should use the same conditions under which you would
run your samples and the scan rates for calibration should ideally bracket the rate(s) for
sample analyses.. (However, selecting rates above 50 °C/min for calibration is usually not
advisable.) Temperature calibration uses the Curie transition of the materials, that is, the
point at which the magnetic properties disappear.
1. Select Preferences from the Tools menu, then select the TGA 8000 tab
.