AES Alignment Routine for Multiplexes when using an Analog Multiplier Supply

The following procedure determines the correct multiplier voltage when you are using an analog (for example, 20-075) multiplier supply to acquire an AES multiplex.

  1. Select the New Multiplex command from the Acquisition menu.

  2. In the Select Element dialog box, click on the elements for which you want to acquire the multiplex. (If the element you want isn’t in the list, click on the New Element button to add the element to the list.) Click on OK to close the Select Element dialog box.

  3. Click on the Apply button. This creates a new AugerScan document in which you will be acquiring the multiplex containing the elements you just specified.

  4. Determine which of the regions in your multiplex has the highest kinetic energy. To do this, open the Settings dialog box (click on the Settings button in the Acquisition toolbar). Then, click on each region in the Regions list and note the Lower Limit and Upper Limit for each region. For example, if your multiplex contains the regions Carbon and Copper (Cu1), you would note that Copper has a higher kinetic energy range (875 to 935) than Carbon (245 to 295). Make a note of the lower limit and upper limit values of this element.

  5. Select the New Alignment command to display the Alignment Settings dialog box.

  6. Set the Upper Limit and Lower Limit energy settings in the Alignment Settings dialog box to the values you noted above so that you sweep over the range of the element with the highest kinetic energy. In our example, you would set the Lower Limit to 875 and the Upper Limit to 935.

  7. Click on the Acquire button to acquire the alignment.

  8. Increase the multiplier voltage until you have 80 to 90% of the maximum allowable signal for your V/F preamplifier. This is the multiplier voltage your system will use to acquire a multiplex. Continue with the procedure for acquiring an AES multiplex.