Endress+Hauser SpectraSensors SS2100i-1, Обзорное руководство

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SCS Overview Manual 3
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1
3 - S
AMPLE
C
ONDITIONING
S
YSTEM
About the SCS
The Sample Conditioning System (SCS) has been specifically designed for the
application to deliver a vapor sample free of particulates and liquids to the
analyzer that is representative of the process. The SCS is also designed to
deliver a vapor sample at the optimal temperature, pressure and flow rate to
the measurement cell. To ensure the integrity of the measurement, personnel
operating or maintaining the analyzer must have a thorough knowledge of the
design and function of the SCS.
Virtually all problems experienced with sample systems result from operating
the system outside of its design conditions. Process upsets, unknown or
unexpectedly high concentrations of liquids or particulate contaminants, high
or low sample pressures or temperatures can cause excessive maintenance,
failure of the SCS, or damage to the analyzer measurement cell. By
understanding the function and limitations of each component in the SCS, and
performing regular monitoring of the system function, most problems can be
avoided or diagnosed and corrected to ensure successful normal operation.
Typical SCS Component Overview
All SpectraSensors tunable diode laser absorption spectroscopy (TDLAS)
analyzers are designed for extractive sampling rather than in situ applications.
This allows for sample conditioning, filtration, temperature, pressure and flow
control to protect the optical components of the system, and provides for ease
of maintenance without shutting down the process.
Some of the typical components used in the SCS are described in this section.
The SCS for your analyzer may not use all of these components, and may also
include additional special devices not discussed here. Please refer to the
system drawings for your analyzer for the SCS configuration.
Personnel should have a thorough understanding of the operation
of the analyzer and the procedures presented here before
operating the sample conditioning system (SCS).
The process sample at the sample tap may be at a high pressure.
A pressure reducing regulator is located at the sample tap to
reduce the sample pressure and allow operation of the sample
conditioning system at a low pressure. Use extreme caution when
operating the sample probe isolation valve and field pressure
reducing regulator.
For questions regarding your SCS, refer to “Service Contact” on
page B-5.