Compute gas properties on a continuous basis. This is normally started via the go script.


gas_prop <priority> <interval> <spec_file> [+c] &



Specify the system task priority.


Specify the time interval or rate the calculations should be made. Specify one of the values supported by the scheduler as specified in the go script.


Specify the fully qualified specification file path and name that contains the list of property variables and their corresponding stream identifier, temperature, and pressure variables.


Optional. Specify this flag to indicate a critical task to the watchdog. The default is to leave the task non-critical.


gas_prop 12 1000 /specs/properties/prop_specs.319&
The above command sets the priority of the process to be 12 and performs  the gas properties at the rate of once every second.  

The gas_prop task will register it’s name with the spec_file name (not the full pathame), in this case “prop_specs.319”.  This name can be used by the ‘re-read’ command to request that it update the specifications by reading the specification file again.  This feature allows the specifications to be changed “on-the-fly” without slaying and restarting the app. 



See Also:

Natural Gas Burner Sizing Calculations, Computing Gas Stream Composition and Gas Flow, Composition and Property Variables