PP Systems CIRAS-2, Руководство оператора

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Observing and Recording Leaf Gas Exchange
CIRAS-2 Operator's Manual Version 2.04
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Enable Internal Recording
If selected, CIRAS-2 will store records internally. Maximum number of records stored internally = 820
records.
Record Interval
Units are based on 10 second increments. If set to 1, the recording interval is 10 seconds. If set to 2,
recording interval is 20 seconds, etc.
Apply Internal Recording
Updates CIRAS-2 with the new information.
Transfer Data
To transfer internally stored CIRAS-2 data to your PC, click on the Transfer Data button. Available
records are transferred from CIRAS-2 into the selected file (dmp extension).
Please note:
„Enable
Internal Recording‟ must
not be selected prior to transfering data. The Save Ciras Internal Records
as…
dialog will be displayed prompting you to enter the name of the file where the data will be stored.
After naming the file, click the Save button. At the conclusion of internal data transfer, a message will
confirm that Data Dump is complete and the number of records transferred.
Click OK when finished. The data will normally be saved to the following location on the PC unless
otherwise specified:
Program Files\Ciras2\Users\PPSystems\DataFiles\
Clear CIRAS Memory
To clear internally stored CIRAS-2 records, click the Clear CIRAS Memory button. After clearing the
memory, the following will be displayed:
Memory Status = OK
Free Records = 820
Stored Diff Bal
The Reference and Analysis analyzers in CIRAS-2 are absolute analyzers and the displayed differentials
derive from the difference between them. In manufacture and calibration, every effort is made to match
the analyzers as closely as possible, but even so differences still exist. Therefore, for accurate results, the
differences must be known. To determine the difference, the Reference air is passed through both
analyzers and the offset is recorded for application to future measurements. We call this process
“Differential Balancing”, or Diff Bal.
Since this process takes some time it may interrupt response curve measurements. It is possible to
determine the offsets over the working concentration range before measurements begin. Six pairs of
concentrations are required, but to simplify the process you only need to enter maxima and minima. Both
CO
2
and H
2
O must be entered and the ranges MUST cover the expected measured values.