Cambridge Sensotec Rapidox 1100L Oxygen Analyser Instruction Manual
data logging, then the software will pause automatically. A message appears on
the screen informing the user that the unit is being accessed from the keypad.
Once the menu has been exited, the software will continue data logging from
where it left off.
9.20
Changing the Data Logging Parameters Mid-run
Once the data logging has begun you may change the sample interval time by
pausing the data logger and then entering a new value for the time interval. The
data logger can then be resumed with the new values in place. Note that you can
not change units (e.g., seconds to hours) once logging has started. If you originally
selected seconds then you may change the current value to a new value between 1
and 3600 seconds, if you originally selected minutes then you may change
between 0.02 and 360 and if you selected hours you may change between 0.01 and
6 hours. Note it is not possible to modify the original total length of time that the
data logging will run for once a run has commenced.
9.21
Working with Spreadsheets
The data-logger saves data files in a standard comma separated ASCII text format
which can be readily imported into spreadsheet programmes such as MS Excel, in
order to produce plots and reports as desired. For specific information on how to
import text files into your spreadsheet programme please refer to the help guide
supplied with the programme.
Data is saved in comma separated value format, with a ‘.txt’ file extension as the
initial programme default. However, when entering the file name, you can instead
select a ‘.csv’ extension: the programme will register the last used file extension as
the new default. The ‘.csv’ extension is recognised by MS Excel, so that opening
the file will automatically run MS Excel, and this may be of benefit if your
regional decimal separator is period ‘.’ rather than comma ‘,’. However, if your
decimal separator is comma, you should continue to use the ‘.txt’ extension and
open the file explicitly from within your spreadsheet programme, defining the
field delimiter as ‘comma’ where appropriate.
9.22
Disaster Recovery
To prevent catastrophic loss of important data during a computer crash or power
failure, the data is automatically saved point by point in a temporary file called
‘Rapidox temporary data file XXXXXXX.txt’ (where ‘XXXXXXX’ is the serial
number). This file is located in the same directory as the main Rapidox
programme itself and can be renamed or copied to recover data that would
otherwise be lost. Note that this file is overwritten each time ‘Run’ is selected
from the ‘Data Logger’ menu so make sure all data is recovered successfully before
starting another run.
Note that during a run using the ‘auto date stamped’ feature, the temporary data
Version 1.6
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Last printed 16/11/2011 16:59:00