Reset Baseline Levels to Zero

1. In ArArCalc, open the Baseline Calibrations dialog box File>Internal Databases>Baseline Calibrations.

   

2. Set the time range from 14 days to present.

3. Note the weighted average value for each of the collectors.

   

4. In this case …

   L2 = -0.0091
   L1 = -0.0113
   AX = -0.0064
   H1 = -0.0090
   H2 = +0.0031
   

5. Write down these numbers and their respective cups and open ArArExperiments and the Manage console.

   

6. In the Manage dialog box there are two columns.

   • UFC Offset [fA] - These are the current offsets.

   • Additional Offset [fA] - This is where you will enter in the values that were obtained in the previous steps (note, the cups are in the reverse order).

     

7. After entering in the values of each of the cups, click the Update XX Offset button.

8. The UFC Offset [fA] value should be refreshed with the new offset values.

9. Note these new values

10. Open Instrument Control and click Detector Setup

    

11. This will bring up the Detector Setup Wizard

    

12. From the previous step, paste the calculated UFC Offset [fA] values into the UFC Offset [fA] column in the Detector Setup Wizard window.

13. Click Apply Changes.

14. Shutdown and restart the computer and Instrument Control. Open the Detector Setup Wizard window again and confirm the values were entered.