Description
2.6 Product characteristics
SITRANS SL
30 Operating Instructions, 12/2010, A5E01132948-04
2.6 Product characteristics
Device-specific characteristics
SITRANS SL is designed for measurement of various gases. Details can be obtained from
chapter Technical Data, standard applications section
Transmission
The system will have full performance when the transmission is within the range of
1 to 100 %.
Dust load
The characteristics of the dynamic changes of optical visibility due to dust including
turbulences is defined by the measurement situation. The influence of dust on the
measurement is very complex and depends on the path length and particle size distribution,
which in many cases is not known. Therefore no general limit for dust load can be given.
However, the SITRANS SL is designed to function without interruptions even at low optical
transmission. The experience indicates that the SITRANS SL systems can measure even at
quasi-static changes of the received optical power of at least 30 dB. This corresponds under
certain conditions to dust loads of up to 100 g/Nm
3
at a path length of 1 m.
Gas analyzer functions
The SITRANS SL can be operated as an independent unit providing the following functions:
● Output signals
The analyzer can output two measurement values:
– gas concentration and
– optical transmission level (through the measuring volume).
● Alarm functions
The analyzer provides alarms/warnings for:
– Transmission drop-off
– Signal quality (if transmission is not sufficient as quality indicator)
– Warnings for system deviations before actual error occurs
– Alarms at system failure.
● Measurement inputs
The analyzer needs to use readings from other sensors to compensate the measured
concentration for varying temperature and pressure. If needed for future applications, it is
also possible to compensate for interference from another gas component.
● Local User Interface (LUI)
The LUI display is located in the receiver housing unit with a back light LCD visible
through a window in the housing lid. It is operated using the IR remote control. The
remote control is safe to use even in a hazardous environment.
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