ABB measurement and analysis of SCC-C sample gas cooler

Use in potentially explosive atmospheres CSA version

Explosion protection The sample gas cooler in the design with CSA certification is certified for use in hazardous areas of Class 1, Division 2, Groups A, B, C and D, Temperature Code T4, ambient temperature max. +50 °C

Standards and directives The approval includes testing in accordance with the relevant Canadian CSA and US guidelines: • Class 2258 02 Process Control Equipment – For Hazardous Locations and • Class 2258 82 Process Control Equipment – For Hazardous Locations – Certified to U.S. Standards

Certificate Certificate no. 1105720

Temperature Data Sample gas temperature at the sample gas inlet Maximum 135 °C

Safety instructions Work on live parts Do not start work on live parts until the environment has been approved as ‘safe’.

The fuses may not be changed until the sample gas cooler has been disconnected from the power supply or the environment has been approved as ‘safe’.

Work on the controller system The cover of the controller flap may not be opened until the surrounding area has been declared an explosion-free zone - free from potentially explosive atmospheres.

Installation Installation site requirements The sample gas cooler in explosion protected design may only be used in areas that ensure suitable protection against the ingress of foreign bodies or liquids.   The sample gas cooler must be installed in a housing or cabinet with IP rating IP 54 or higher in accordance with IEC 60079-0.

Design and function

 1 Housing 

 2 Temperature controller with LED display 

 3 Hose pumps for condensate or dosing (optional) 

 4 Condensate output

5 Mounting bracket 

 6 Sample gas connections of the heat exchangers 

 7 Cable entries for the electrical connection cables   (permanently connected)

Intended purpose of the sample gas cooler

The SCC-C sample gas cooler is a component of the sample gas conditioning system in an analyzer system. In the sample gas cooler, the humid sample gas is cooled to such an extent that the temperature does not down-scale the dew point at any subsequent point in the analyzer system and therefore no condensate can penetrate the gas analyzer.

Functions of the sample gas cooler The SCC-C sample gas cooler has the following functions:

• cooling of the sample gas, 

• separation of the condensate and 

• condensate discharge.

For certain measuring functions, the dew point of the sample gas must be kept constant in order to eliminate the influence of water vapor on the measurement result. In these cases, the constant water vapor content is considered during calibration by the test gas supply upstream of the sample gas cooler.

Use in conjunction with the sample gas feeder unit SCC-F The SCC-C sample gas cooler can be used in conjunction with the SCC-F sample gas feeder unit. The SCC-F sample gas feeder unit has the following functions: 

 • condensate monitoring, 

 • sample gas feed and 

 • flow adjustment and monitoring.

For information on the SCC-F sample gas feeder unit, refer to the operating instructions OI/SCC-F.

Note 

The SCC-F sample gas conveying unit is not available in an explosion protected version in category 3G.