Differences

This shows you the differences between two versions of the page.

--- lamp [2021/10/04 18:06] – added lamp change instruments reno
+++ lamp [2021/11/19 18:59] (current) – mbrohart
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 ===== Standard Lamp =====
-One of the purpose of of the standard lamp is to determine the R6/R5 value which is used as part of the calculation to determine the total column ozone. This can be measured by running the **SL** command.
+The purpose of of the standard lamp is to determine instrument stability by monitoring the standard lamp ratios.  The double ratios (R6/R5) are used as part of the calculation to determine the total column ozone and SO2 measurements. This can be measured by running the **SL** command, taking about 9 min. to complete.
 For double spectrometer (MkIII) the standard lamp is also used to find the optimal position for the micrometer to get the highest intensity output. This can be done by running the command **HP**.
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 ===== Mercury Lamp =====
-This is used to determine the operating position where the instrument measures at. Operation position is temperature dependent and will change with the temperature. The measurement is done via the **HG** command. During most schedule, HG will run every two hours or when the temperature has changed more then 2c.
+This is used to determine the operating position where the instrument measures at and takes 7-9 min. to complete. Operation position is temperature dependent and will change with the temperature. The measurement is done via the **HG** command. During most schedule, HG will run every two hours or when the temperature has changed more then 2c.
 ==== Replacing the HG lamp ====
   - Perform the following command and note and correction that the software applied to the micrometer position<code | MKII/MKIV>pdb1frhghghg</code><code | MKIII>pdfrhphghphghphg</code>