Plumbing Connections

 

There are five plumbing connections on the MGA 6010:

• Sample Inlet – The incoming gas to be sampled should be routed through this port after passing through the included bowl filter.

• Sample Vent – After sampling, the gas will exit the enclosure through this port. Due to the potentially harmful nature of the gas being measured, the gas should be vented to a place in accordance with local regulations and safety standards.

• Zero and Span Calibration Gas Inlets – These are ¼” NPT female ports for connecting to calibration gases.  For more information on acceptable calibration gases see the Sensor Calibration section of this manual.  The incoming pressure of the gas will need to be adjusted to allow the flow to be the same for the calibration gas and the sample gas flow rate.  The incoming pressurized gas goes through a small fixed orifice inside the analyzer, which should require between 20 and 50 psi to maintain proper flow.  These ports are used with the automatic calibration system to provide calibrations at predetermined intervals or events.  The use of these ports is not required for the operation of the MGA 6010.

• Auxiliary Calibration Gas Inlet – This ¼” NPT female port provides another entry point for both zero and span calibration gases.  If calibrations are being performed manually, this port should be used for both gases.

 

The flow of gas through the MGA 6010 is controlled by solenoid valves.  Each valve is normally closed, and for safety purposes all valves will shut to prevent unwanted furnace gases from entering the instrument when power to the enclosure is lost or the specified sampling parameters are not met.

 

Appendix A: Piping Diagram shows the plumbing connections.