PerkinElmer TGA 8000, Инструкция по установке и эксплуатации оборудования

Страница: 46 / 94

46 . TGA 8000 Installation and Hardware Guide
Calibrate the TGA 8000
The TGA 8000 is calibrated at the factory and this calibration file is loaded from the CD upon
installation. There is also a default calibration which removes all of the calibration
adjustments and reverts to the hardware presets.
The TGA must be calibrated before obtaining accurate data. Calibration is performed using
the Pyris Software calibration routine which is accessed from the Calibrate menu through
the Method Editor window. There are four independent calibration routines accessed through
the three tabs on the Calibration menu item that should be performed for a TGA with or
without an autosampler:
•
Weight Calibration
•
Temperature Calibration
•
Balance Drift Optimization
•
Baseline Drift Optimization
In general, the calibrations should be performed in the above order; however, the weight
calibration will be done first and will likely only need to be done again if the TGA is moved or
re-leveled.
Before redoing the baseline calibration, restore the default baseline using the Restore
function in the Calibrate menu. The 7-hour Baseline Drift Optimization needs only to be
performed once, provided the full calibration was not set to defaults.
The Temperature and Baseline Calibration may be re-done to optimize the TGA for
optimum temperature and weight loss accuracy. For many routine separations this level of
calibration accuracy is unnecessary. It is wise to Save and Apply each calibration that is
performed under a new and descriptive file name so it can be recalled in the future using the
File Open menu item.
Performing a Weight Calibration
This calibration will be default depending on which Y Range you are using. Most people use
the Low Range which gives a dynamic range of +/- 160 mg which is appropriate for almost
all TGA analyses. This procedure will also work if you choose to calibrate the High Weight Y-
Range which must be used if samples heavier than 160mg are to be analyzed. This
procedure needs to be modified if you calibrate the Ultrasensitive Y-Range in that you will
need to purchase and substitute an accurate 10mg reference standard. This may offer a
slight advantage when analyzing very small samples and optimizing the sensitivity for small
weight changes.
In order to perform the weight calibration, you will need the 100 mg calibration weight (P/N
09200501) in the Spares Kit (P/N N5320026).
1. Select Preferences from the Tools menu, then select the TGA 8000 tab
.