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dsp [2023/10/17 12:37] – andrewdsp [2024/01/16 15:17] (current) – Added the notes section for additional information reno
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 === Dispersion Initialization === === Dispersion Initialization ===
  
-  - Begin the dispersion calibration routine from the home brewer control screen.  For the purposes of this SOP Brewer 008 is the instrument being calibrated. // {{ :pictures:screenshot_from_2023-10-16_15-31-46.png }} //+  - Begin the dispersion calibration routine from the home brewer control screen.  For the purposes of this SOP Brewer 008 is the instrument being calibrated. \\ {{:pictures:screenshot_from_2023-10-16_15-31-46.png?400|}} \\
   - Press '//Home//' to home out the instrument    - Press '//Home//' to home out the instrument 
   - Type '//pd//' in the command line and press enter. The pd command writes the data file into the Brewers D file.   - Type '//pd//' in the command line and press enter. The pd command writes the data file into the Brewers D file.
   - Type '//dsp//' and press enter.   - Type '//dsp//' and press enter.
-  - Press the number associated with the lamp being used. // {{ :pictures:screenshot_from_2023-10-16_15-32-37.png }} // +  - Press the number associated with the lamp being used. \\ {{:pictures:screenshot_from_2023-10-16_15-32-37.png?400|}} \\ 
-  - Press //y// or //n// and then press enter (n is pressed only if the lamp has been on for a minimum of 10 minutes). // {{ :pictures:screenshot_from_2023-10-16_15-32-59.png }} // +  - Press //y// or //n// and then press enter (n is pressed only if the lamp has been on for a minimum of 10 minutes). \\ {{:pictures:screenshot_from_2023-10-16_15-32-59.png?400|}} \\ 
-  - Press '//2//' to select UV Dome and then enter. // {{ :pictures:screenshot_from_2023-10-16_15-33-45.png }} // +  - Press '//2//' to select UV Dome and then enter. \\ {{:pictures:screenshot_from_2023-10-16_15-33-45.png?400|}} \\ 
-  - If the program determined wavelengths correspond with the table below, press '//A//', if not press '//R//' to correct. // {{ :pictures:screenshot_from_2023-10-16_15-34-03.png }} // +  - If the program determined wavelengths correspond with the table below, press '//A//', if not press '//R//' to correct. \\ {{:pictures:screenshot_from_2023-10-16_15-34-03.png?400|}} \\ //Note:  The wavelengths used to conduct dispersion calibrations for single brewers (S) and double brewers (D) are tabled below. The DSP calibration script automatically determines the wavelengths that will be used based on the brewer model being tested.//
- +
-^Lamp Type^Line (LN)^Starting Slit^Ending SLit^Wavelenth AU^Brewer Model^ +
-|Hg|1|0|1|2893.600|S, D| +
-|Hg|2|0|3|2967.280|S, D| +
-|Hg|3|0|5|3341.480|D| +
-|Cd|4|0|5|3080.820|S, D| +
-|Cd|5|0|5|3133.167|S, D| +
-|Cd|6|0|5|3261.055|S, D| +
-|Cd|7|0|5|3403.652|D| +
-|Cd|8|1|5|3499.950|D| +
-|Cd|9|5|5|3611.630|D| +
-//Note:  The wavelengths used to conduct dispersion calibrations for single brewers (S) and double brewers (D) are tabled below. The DSP calibration script automatically determines the wavelengths that will be used based on the brewer model being tested.// +
   - Press //enter// when ready.   - Press //enter// when ready.
-  - An example of the brewer screen while waiting for a dsp test to start. 
   - Typical screen display during a dsp test.  Note: The highest counts should be near the middle of the scan, center portion of the center column.   - Typical screen display during a dsp test.  Note: The highest counts should be near the middle of the scan, center portion of the center column.
   - Once the dsp test has completed the brewer will return to menu mode.  Type '//pd//' and then press enter to write the dsp results to the D file.    - Once the dsp test has completed the brewer will return to menu mode.  Type '//pd//' and then press enter to write the dsp results to the D file. 
-  - Using the most recent D file confirm that the Hg’s have “passed” and that there is not a step difference greater than one from the offset to the target number of steps. If this is not the case, do not proceed with the remaining lamps until the cause in discrepancy has been corrected.  The lamp that was tested will again have to be re-run. The D file is located in the instruments data directory. // {{ :pictures:d_file_image.png }} //+  - Using the most recent D file confirm that the Hg’s have “passed” and that there is not a step difference greater than one from the offset to the target number of steps. If this is not the case, do not proceed with the remaining lamps until the cause in discrepancy has been corrected.  The lamp that was tested will again have to be re-run. The D file is located in the instruments data directory. \\ {{:pictures:d_file_image.png?400|}} \\
   -  If the before and after dispersion Hg are within one step, turn off the lamp that was tested, allow it to cool then remove and store it safely.   -  If the before and after dispersion Hg are within one step, turn off the lamp that was tested, allow it to cool then remove and store it safely.
   - Repeat the above procedures for the remaining lamps.     - Repeat the above procedures for the remaining lamps.  
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 +====== Notes ====== 
 +Typically on instruments with a small slit 0 (and occasionally with instrument with a narrow offset slit 0) you may find the Fit to be closer to around 100pM. This is normal however it is suggested to use a quadratic dispersion as it usually is more accurate than a cubic dispersion.\\ 
 +{{:pictures:dsp_fit_results.png?400|}}\\ 
 +You can also see a difference in the slit 0 wavelength. This is not considered as a problem and just how the instrument was built. The dispersion will characterize the instrument properly\\ 
 +{{::dsp_abs_results.png?400|}}\\
  
dsp.1697546263.txt.gz · Last modified: 2023/10/17 12:37 by andrew