PerkinElmer STA 8000, Инструкция по установке и эксплуатации оборудования

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40 . STA 8000 Installation and Hardware Guide
Set Up the STA 8000 System Components
Place the STA 8000 on your laboratory bench. Do not plug in the power cord until instructed.
The computer and printer should already be on the bench and installed according to each
instrument’s instructions.
Be sure to set up all of the system components listed below before configuring the
STA 8000:
• Install the purge gases
• Remove the shipping/alignment tool
•
Install the sensor
•
Install the cooling device
Connect the Purge Gas Supply to the STA 8000
The STA 8000 has a system purge gas inlet and two sample purge gas inlets at the back of
the analyzer. The system purge gas purges the outer portion of the sensor/heat exchanger
assembly with dry gas. This facility must ALWAYS be used when working with the analyzer.
The purge gas, preferably dry nitrogen, prevents condensation of water vapor on the
measuring cell. The system purge gas flow is controlled by a needle valve inside the
analyzer, and is preset to a flow rate of 45 ml/min.
NOTE: The gas pressure must be regulated by the user to a maximum of 90 psi (6.2 bar). A
pressure of 30–45 psi (2–3 bar) is suitable for most experiments.
The sample purge gas inlets (A and B) are used to purge the furnace, and are part of the
internal gas selector (which has two inlets and one outlet). Argon or nitrogen of 99.9%
minimum purity is recommended for purging the sample area. Other gases such as air or
oxygen may also be used. The flow rate of the sample purge gas is controlled using the Pyris
software, and can be between 0 and 200 ml/min.
NOTE: The gas must be dry. A flow rate of 20–40 ml/min is recommended.
The procedure for connecting the purge gas supply includes the following steps:
•
Connect the purge gas line to the system gas supply.
• Install a filter dryer (optional).
• Connect the purge gas and system purge gas lines to the STA 8000.
For more information on the purge gases, see
Sample Handling
on page 57.