Difference between revisions of "Calibration process procedures"

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(Created page with ''''Calibration''' The Wetlabs AC9 instrument is processed before every PnB cruise. During the calibration process, AC9 readings are recorded in Wetview from 'a' and 'c' channel…')
 
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'''Calibration'''
 
 
The Wetlabs AC9 instrument is processed before every PnB cruise.  During the calibration process, AC9 readings are recorded in Wetview from 'a' and 'c' channels when de-gassed Q water is run through the instrument.  Temperature of the water is also noted.
 
At the end of the calibration procedure wtr_d_yymmdd*.dat and yymmddwatertemp.txt files are created, with "*" denoting the letter designation of the run made(starting with a).  Typically three runs are standard to get consistent and accurate values.
 
 
 
'''After calibration processing of calibration files'''  
 
'''After calibration processing of calibration files'''  
  

Revision as of 11:13, 24 November 2010

After calibration processing of calibration files

As of October 2010 calibrations of been reprocessed with new 'Sit' values. The processing directory for AC9 calibrations is /pb/REPROCESS_2010/AC9/cals_reprocess/ instrument number(184) /QWATER/ year/date folder.

To process the calibration files, the device number _watertemp.txt file must be updated with the latest temperature value and .dat files must be present in the folder you wish to process in. ac9cal.m sources ac9cal_def.par in the cals_reprocess/LIST folder.

Reviewing calibrations

After processing, it is good to compare the latest calibration processed values with previous ones. For this, data from the _ave.txt files(which should be linked by you from the .txt files in the year/date folder) is added to the qcal_a_yy_yy.txt and qcal_c_yy_yy.txt files. ac9cal.m is restarted and the qcal file is now the *yy_yy.txt folder. Hit the last button ts_cal to view the whole time series.


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