Data collection: -


The start of an experiment is initiated by the activation of a footswitch or the push of a button on the computer screen. Information about the test and the sample is entered prior to the run.This is stored to disk, together with the numerical data generated during the test. Data is collected and stored at user defined intervals.The intervals can be defined over a range from 1 to 60 seconds. Real time data is displayed on the VDU during the course of a test.The information is displayed in graphical and textual form. The graphical form is an auto-scaling graph with time on the x–axis and transmission (%) and specific optical density on two y–axes.


Textual data includes:- 


Instantaneous transmission (%) and specific optical density (DS  Time from start of test  Maximum DS


and time to maximum DS


 Current range setting and filter position  Mass (ISO 5659)





Prompts (visual and audio) when the range setting or filter position requires changing when operating in manual mode.When operating under software control the range setting is automatically changed.


The experimental data stored during a run includes: - 


Time (seconds), t  Transmission (%) at time t


 Specific optical density at time t  Range and filter positions at time t  Mass (g) at time t (ISO 5659)


On completion of the test, the clear beam transmission is recorded to correct the data for deposits on the optical system. A report including a graph and table of specific optical density (DS


) against time is produced.The report can be printed on any device with a Windows driver.


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