Teledyne Analytical Instruments 3020 M, Руководство по эксплуатации

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Paramagnetic Oxygen Analyzer Installation
Teledyne Analytical Instruments
35
The gas pressure in should be reasonably regulated and stable as
indicated by a stable flowmeter reading. The maximum pressure should
not exceed 25 psig.
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 25 psig are acceptable as long as the pressure, once
established, will keep the front panel flowmeter reading in an acceptable
range (50 to 250 sccm). For non-pressurized sample or very low
pressure, (1 psig or less) vacuum service plumbing is recommended.
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,
described below, with minus signs before the pressure
readings.
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.
ZERO IN and SPAN IN (Optional):
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 completely
under control of the 3020M 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.