PerkinElmer TGA 8000 Installation And Hardware Manual page 22

22 . TGA 8000 Installation and Hardware Guide
application. In addition, there is also an AutoStepwise Scan available in the method program.
This scan heats the sample rapidly between weight loss regions, and slows down or stops
heating during rapid weight loss regions.
Scanning Rate
Scanning rates range from 0.1°C/min to 500°C/min for the standard furnace. The exact
scanning rate used will depend on the experiment and the end result you are trying to
achieve. For example, most TGA experiments are performed at heating rates of 5°C/min to
50°C/min. However, there may be times when you want to heat or cool rapidly to a selected
temperature and then hold isothermally or scan a controlled rate. In such cases, very fast
heating or cooling rates (i.e., 100°C/min or 200°C/min) are typically used to quickly increase
or decrease the sample temperature.
Sample Atmosphere
WARNING: Due to the highly explosive nature of hydrogen, it is recommended
that it not be used with this instrument.
AVERTISSEMENT: En raison de la nature très explosive de l'hydrogène, il est
recommandé de ne pas l'utiliser avec cet instrument.
The atmosphere to which the sample is exposed is carefully controlled by the selection of the
sample purge or sample gas and flow rate. Recommended sample gases are nitrogen, argon,
helium, carbon dioxide, air, oxygen, or other inert or reactive gases, as long as they do not
react with the furnace materials, thermocouple, or other analyzer components in which gases
come into contact. Analyses are done at normal pressure or at reduced pressures.
In addition, sample gases may be switched at any point during an analysis, for example, the
pyrolosis of a polymer occurs while in an inert atmosphere (Sample Gas A) then switching to
an O2 or Air to oxidize the remaining components (Gas B), by using the internal gas
switching capabilities which accurately control the flow rates of both gasses.
NOTE: Before starting installation, please read the Safety and Regulatory Information.
Cooling Device
Chiller: -20°C and above
Electrical Requirements
Power Source: An independent power source should be provided for the system,
including the computer. The power source should not be associated with heavy-duty
equipment such as large motors, or with possible sources of high-frequency
interference such as photocopying systems, discharge lamps, or radio transmitters.
The power supply should be fused at a maximum of 20 A (120 V systems) or 16 A
(200 240 V systems).
Line Voltage: PerkinElmer analyzers and their associated instruments are designed
to operate within a line voltage range of 10% of the nameplate voltage or other such
voltage selected at installation to suit the particular country or region. (The range for
240 V systems is +6%, –10%.) The supply must be smooth, clean, earthed and free
of transient voltages over 40 V.
The frequency range is +/-1% for 50 Hz and 60 Hz systems.
Instrument Maximum Power Requirements:
TGA 8000: 100 - 240 +/- 10%, 50/60 Hz. +/- 1%