MGA
An SSi MGA (Multi-Gas Analyzer) can be set up as a Client instrument to the 9215. Refer to the Client Instrument Setup menu for more information on how to configure a Client instrument from the touch screen.
A drop-down menu allows you to select the part of the process at which the gas is being analyzed. MGA Endo is for incoming gas. MGA Furnace is for outgoing gas.
Once an MGA is "Cliented," several parameters can be read from the MGA and displayed on the 9215 screen. These include IR %C, IR CO Factor (see note below), IR Process Factor, IR equivalent mV, IR Temperature, Probe %C, Probe CO Factor, Probe Process Factor, Probe mV, Probe Temperature, Pump Status, Alarms, and Gas 1-6 (parameter value shown for each gas). These parameters are for display purposes only and cannot be modified from the 9215 screen. |
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NOTE: COF is the sole adjustable variable that can be used to influence the calculated carbon potential; with other parameters (Probe mV and Temperature) being fixed. As such COF can be increased/decreased to compensate for differences with a furnace, atmosphere composition, etc. The table below shows how changes to COF will result in different calculated carbon potentials.
Note: Default COF is set to 200.
COF |
Prove mV |
Probe Temp |
Carbon |
190 |
1100 mV |
1700°F |
0.44 |
200 |
1100 mV |
1700°F |
0.46 |
210 |
1100 mV |
1700°F |
0.48 |