PerkinElmer TGA 4000, Инструкция по установке и эксплуатации оборудования

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52 . TGA 4000 Installation and Hardware Guide
8. Click the
Zero Weight
button on the control panel.
The weight of the empty sample pan is displayed in the Zero field on the Sample Info
page.
9. Remove the furnace lid. Without removing the pan, place a 1–2 mm length
(approximately 20 mg) of reference material in the sample pan.
10. Place the furnace lid on the analyzer, position the plastic spacer and the magnet over
the center of the lid, and click the
Sample Weight
button on the control panel.
The weight appears in the Weight field in the Sample Info page.
11. Complete the other information on the Sample Info page.
12. To run Curie points, you must run the reference material under the same experimental
conditions that you will run your samples. Check the purge gas type, coolants used, and
the scanning rate.
The first run of a reference material is performed at a scanning rate of 5 °C/min.
13. Start the run by clicking the
Start Method
button in the control panel.
14. When the run is finished, remove the sample pan and repeat steps 5 through 13 for the
same reference material but at a scanning rate of 50 °C/min.
15. After the second run for one reference material, repeat steps 5 through 14 for the other
reference material(s) you choose to use.
16. For each data file collected, open the Data Analysis window, select the data file, and
calculate the Offset value by performing an Onset calculation at the end of the Curie
point transition. Note the Onset result.
17. When all runs are complete and Onset calculations have been performed, select the
Calibrate
command in the View menu.
The Calibration window appears.
18. Select the Temperature Calibration tab. Enter the
Operator
name. Enter the names of
the reference materials used, the expected Onset values (provided in the
documentation accompanying the reference materials), and the measured Onset results
at the two scanning rates for each reference material.
19. Enter the scanning rates used in the
Rate 1
and
Rate 2
fields and click the appropriate
option to indicate which references to use for the calibration:
1 and 2
or
1, 2, and 3
.
20. Click the
Save and Apply
button in the Calibration window to send the new calibration
values to the analyzer and save the current calibration file.
21. Click
Close
to close the Calibration window and begin using the new calibration values.