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SCC-F Sample gas feed unit Operator’s manual
42/23-51 EN Rev. 3
Appendix
Use and functions of the sample gas feed unit
The purpose of using
the sample gas feed
unit
The SCC-F sample gas feed unit forms part of the sample gas conditioning system
in an analysis system. It is designed for continuous dosed feeding of sample gas.
The sample gas feed unit is used to condition the sample gas, which has been
extracted at a gas sampling point and which may have been pre-cleaned and dried,
in terms of pressure and flow. The conditioning is carried out in such a way that a
constant quantity of sample gas is supplied to the connected gas analyzer
irrespective of the process conditions.
Functions of the
sample gas feed unit
The functions of the SCC-F sample gas feed unit are:
Feeding the sample gas,
Fine-filtering the sample gas,
Setting and monitoring the sample gas flow and
Monitoring the sample gas feed path for condensate penetration, with fault status
signaling and limit value signaling of the sample gas flow.
Use in conjunction
with the SCC-C
sample gas cooler
The SCC-F sample gas feed unit can be used in conjunction with the SCC-C
sample gas cooler.
The functions of the SCC-C sample gas cooler are:
Cooling the sample gas,
Separating off the condensate and
Removing the condensate.
Reagent dosing
The peristaltic hose pump for reagent dosing is installed as an option
either in the sample gas feed unit (Catalog No. 23212-0-xx1xxx000000)
or in the sample gas cooler (Catalog No. 23070-0-xxxx3xxx0000).
When the peristaltic pump is installed in the sample gas feed unit it is turned off
when a “condensate” failure occurs. When the pump is installed in the sample gas
cooler this is not possible.
The pump’s feed performance is 15 ml/hour.
The functionality and operation of the sample gas cooler as well as the reagent
dosing connection are described in the SCC-C sample gas cooler operator’s
manual (Document No. 42/23-55 EN).
Note on explosion
protection
The SCC-F sample gas feed unit must not be used
For feeding mixtures of gas/air or gas/oxygen that are capable of ignition during
normal service,
For feeding flammable gas, which can combine with air or oxygen to form an
ignition-capable mixture, or
In a potentially explosive atmosphere or in hazardous areas.
