Trace Oxygen Analyzer |
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| Installation 3 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Figure 3-9: Gas Connector Panel
SAMPLE IN: In the standard model, gas connections are made at the SAMPLE IN and EXHAUST OUT connections. Calibration gases must be Tee'd into the Sample inlet with appropriate valves.
The gas pressure in should be reasonably regulated. Pressures between 3 and 40 psig are acceptable as long as the pressure, once established, will keep the front panel flowmeter reading in an acceptable range (0.1 to 2.4 SLPM). Exact figures will depend on your process.
If greater flow is required for improved response time, install a bypass in the sampling system upstream of the analyzer input.
Note: If the unit is for vacuum service, the above numbers apply instead to the vacuum at the EXHAUST OUT connector, de- scribed below, with minus signs before the pressure readings.
ZERO IN and SPAN IN: These are additional ports for inputting span gas and zero gas. There are electrically operated valves inside for automatic switching between sample and calibration gases. These valves are com- pletely under control of the 3020T Electronics. They can be externally controlled only indirectly through the Remote Cal Inputs, described below.
Pressure, flow, and safety considerations are the same as prescribed for the SAMPLE IN inlet, above.
EXHAUST OUT: Exhaust connections must be consistent with the hazard level of the constituent gases. Check Local, State, and Federal laws, and ensure that the exhaust stream vents to an appropriately controlled area if required.
Teledyne Analytical Instruments |
