Michell Instruments Condumax II User Manual page 10

INTRODUCTION
The measurement system components are housed within a cast aluminum EExd rated
enclosure. The enclosure has a screw cover incorporating a sealed window. It is
chromate primed, polyester coated in black, and provides environmental protection to
IP66/NEMA 4. An enclosure breather is fi tted in the form of an additional fl ame arrestor.
It is important that no pipe connection is made to this breather and that no restriction
is allowed to occur.
All sample wetted metallic parts are manufactured in AISI 316L stainless steel with
Viton soft parts that comply with the NACE standard MR-01-75 (latest edition). Tube
fi ttings are twin ferrule compression type. All electrical and gas connections are made
through the base of the enclosure. Refer to the Mounting Drawing in Appendix A.1.
The hydrocarbon dew-point fl ow components are as follows (refer to the 'Flow Diagram'
in Appendix A.2):
• Flow Switch 1
Provides indication that a fl ow is present throughout the hydrocarbon
dew-point measurement stream.
• Hydrocarbon Dew-point Sensor Cell
Provides the measurement of hydrocarbon dew point within the sample
gas.
• Pressure Transmitter 1
Provides the measurement of the sample gas pressure within the
hydrocarbon dew-point measurement cell.
• Solenoid Valve
Enables sample gas shut off to provide fi xed volume measurement.
The water dew-point fl ow components are as follows:
• Flow Switch 2
Provides indication that a fl ow is present throughout the water dew-point
measurement stream.
• Pressure Transmitter 2
Provides the measurement of the sample gas pressure within the water
dew-point measurement cell.
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Condumax II User's Manual
97081 Issue 28.1, July 2018