Endress+Hauser SpectraSensors SS2100i-1, Обзорное руководство

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SS2100i-1 and SS2100i-2 Analyzer
3
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2 4900002288 rev. B 1-13-21
SCS filters
A guard filter is typically installed at the inlet to the SCS with a fine element to
protect the flow controllers, flow meters and pressure regulators from fine
particulates.
A bypass filter with a fritted metal, glass fiber or polymetric membrane filter
may also be in place to remove larger quantities of particulates or entrained
liquids and mists. Some filters may fit with liquid knock-out traps to protect the
system from free liquids.
Accumulation of liquids in these filters, or a steady flow of liquid from a liquid
knock-out trap, should be investigated and corrected immediately as this is
generally an abnormal condition.
Sample transport tubing
Sample transport tubing must be made of an appropriate material, which may
be coated and of an appropriate diameter for the application. Many times the
sample transport tubing must be heat-traced to prevent sample condensation
or to prevent fluctuations in measurement due to changes in ambient
temperature. Refer to the system drawings for your analyzer for
SpectraSensors’ recommended sample transport tubing specifications.
Sample bypass flow control
A sample flow control valve and flow meters are usually provided to maintain
a flow of fresh sample to the SCS even during system shut-down. The flow
control valve is typically a needle valve and should be closed very gently and
carefully if used to shut off flow completely to avoid damaging the valve. If the
bypass flow meter has a glass tube, perform an occasional check for evidence
of liquid in the tube. If liquid is found in the bypass or sample cell flow meter
tubes, investigate and correct immediately.
SCS pressure regulator
All SpectraSensors’ TDLAS cells are limited to a maximum 10 PSIG pressure.
To ensure that this pressure is not exceeded, a pressure regulator is provided
inside the sample system. Refer to the system drawings for your analyzer for
the correct pressure setting for this regulator.
Sample flow controller
A sample flow controller is normally provided with the SCS in which a flow
control needle valve and flow meter similar to the sample bypass are used, but
in some cases a differential flow controller is used. As with the bypass flow
control valve, if the flow control needle valve and flow meter must be used for
sample shut-off, close the valve gently and carefully to avoid damage.