Re: Logarithmic conversion / Breakpoint tabes

[Bernhard Kuner <bernhard.kuner@bessy.de>]

Hello All,

here at Bessy we use a ai record to read the 0..10V vacuum pressure 
signal and convert it to the logarythmic value of the vacuum pressure. 
This is usefull to show bargraphs of the vacuum and most people are just 
interested in vacuum good or bad . A following calc-record converts it 
to EGUs for numeric display. The logarythmic value is also the archived 
one because once (long ago, can't remember the details) we had run into 
the problem that an archive client tried to represent the vacuum of 1.23 
* 10^-8 with a float number. This was the true but undesired value of  
0.00000 :-)

Bernhard Kuner