4.7 Calibration of test tubes
In order to measure the exact volume, calibration of test tubes used on the instrument is
recommended.
As for the sample temperature probes, it is possible to store several calibrations (maximum 1000).
The level follower screen proposes:
- Creation: create a new calibration (case of a new test tube)
- Modification: modify a calibration (in the case of a deviation or erroneous
measurements)
- Deletion: delete a calibration (if the test tube is destroyed or the calibration is false)
- Display: display calibration (allows checking the points entered)
- Default: declares a test tube selected by default (it is this test tube that will be called up
when starting a test)
- Print: allows printing out the calibration values
The calibration procedure consists in placing two known precise volumes of liquid in the test tube.
During the procedure, it is possible to modify the two calibration volumes. However, in accordance
with the standard, it is recommended to retain the points 5 mL and 100 mL.
The 5mL point must be calculated precisely (by weighing or pipette). The 100 mL point will
preferably be made using the test tube graduation, since it is the mark that will be used
subsequently during the tests to pour 100 mL into the flask.
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