Set Setpoints based on IR Factor

 

The RGA has the ability to automatically adjust temperature and atmosphere setpoint in an effort to get the Process Variables (PVs) for temperature and atmosphere within a selected range set in the IRF Matrix. This option allows you to select an IRF Matrix range set based on which the RGA will make adjustments to temperature and atmosphere setpoints. Of course, if the IRF Matrix is configured so that only temperature is used in determining changes to the IR Shim Factor, only temperature will be displayed in the menu for Set Setpoints based on IR Factor, and only the temperature setpoint will be adjusted by the RGA when this option is used. Note that Use IRF Matrix and Use Furnace Temp for Furnace Setpoint must both be set to “True” for this option to work. In addition, the RGA must not be configured to communicate with slave instruments; see the IMPORTANT! box below.

 

 

An example of how this option is used can be given as follows. Assume that, in the IRF Matrix, one of the range sets is (0.25 <= Atm < 0.4, Temp < 1200) with a corresponding IR Shim Factor of 135. Because this range set is set up in the IRF Matrix, it will appear as an option in the Set Setpoints based on IR Factor selection list. To apply this range set to the atmosphere and temperature setpoints, the user first taps on the line in the menu list until that option is highlighted. Next, the user taps on the Select Input button to apply that option.

 

Once the range set is selected and applied, the RGA will automatically change the temperature setpoint and (if applicable) atmosphere setpoint. In the Carbon Calculation screen, the Temperature Setpoint and Carbon Setpoint will not be visible or editable while control is based on IR Factor.

 

IMPORTANT!   This option will work only when the RGA is not communicating with any slave instruments. If you attempt to use this option by tapping it and then tapping “Edit” when the RGA is communicating with a slave instrument, the message “Cannot use this feature with Slave Instrument configured” will be displayed. To disable slave instruments, open the Communications and Source Setup → Atmosphere/Temp Sources menu; then set both the Probe Temp/mV Instrument Address and Furnace Temp Instrument Address to “0”.