PerkinElmer TGA 8000, Installation And Hardware Manual

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Order Spares and Accessories . 23
Purge Gas and Pneumatic Supply Requirements
Minimally, the TGA 8000 requires a System Purge gas, also known as the balance purge. This
gas must be clean and dry. System gas is controlled by a mass flow controller resident in the
analyzer. Pressure, between 2-3bar is applied at the connector at the rear of the analyzer
labeled “System Gas”. Typically this is an inert, non-reactive gas i.e. N
2
, Ar, or He. Gases
such as Air or O
2
can also be used.
A Sample Purge gas is not a requirement to operate the TGA, however it is recommended.
There are two inputs, A and B for the sample gas which are also controlled by a separate mass
flow controller, allowing for gas switching experiments. Typically, “Sample Gas A” is the same
gas that is purging the “System” (Balance) and “Sample Gas B” would be Air or O2. Switching
gases at elevated temperatures facilitates the burning of the sample and aids in the cleaning of
the furnace and sample pans.
The recommended purge gas for all Thermal Analyzers at ambient temperatures is argon or
nitrogen with a minimum purity of 99.9%. Other gases, such as air or oxygen, may also be used.
The purge gas for any instrument must be dry. Use a size 1A cylinder equipped with a pressure
regulator that has a shutoff valve at the outlet. The shutoff valve should have 1/4-in. NPT male
threads on the outlet side for connection to the analyzer’s purge gas line.
CAUTION: Maximum pressure should not exceed that listed in the chart below.
ATTENTION: La pression maximale ne doit pas dépasser celle indiquée dans le
tableau ci-dessous.
Gas Pressure Flow
Purity
(Minimum)
System Gas:
Argon, nitrogen, helium, air or
oxygen
29- 43.5 psi (2-
3 bar)
0-200 cc/min 99.95
Sample Gas:
Argon, nitrogen, helium, air or
oxygen
29- 43.5 psi (2-
3 bar)
0-100 cc/min 99.95
Reactive Gas: Argon,
nitrogen, helium, air or oxygen
Unpressurized
0-100 cc/min
(Controlled with restrictor
at the source gas)
99.95
Install a Filter Dryer
The filter dryer is an optional accessory that is used to remove moisture, carbon dioxide, and
other impurities from your purge gas or any other gas used with a particular analyzer. Refer
to Ordering Spares and Accessories, or contact your local PerkinElmer sales representative
for assistance when ordering this accessory.
Space Requirements
Prepare a clean bench space large enough to accommodate all system components and
accessories. Click on the appropriate analyzer below to display the dimensions of a
component. For computer and printer dimensions, refer to the manufacturers’ instructions
that were included with them.
NOTE: Before the instrument is installed, the area around, under and behind the instrument’s
planned location is to be cleared of any dirt and dust to prevent their entry into the
instrument’s interior, which could adversely affect performance.
Once all of the above requirements are met, you can install your analyzer.