Is there any way to calculate the stability of an instrument such as current sources and digital voltmeters from their datasheet?
Let me provide one example. My application requires stable current sources (better than 100ppm for a few hours) capable of feeding a probe with 10 mA. In principle, I could use the Keithley 6221 to do so. If I check its datasheet, I find this:
For 10 mA, the accuracy would be +/-(0.05% * 10 mA + 10 uA) = +/-15 uA (1500 ppm with regard to 10 mA). Of course this is accuracy and not stability. But then, with the information above, how could I tell whether this instrument is or is not appropriate for my 100ppm stability specs? Can I reach any conclusion just based on the typical noise? If so, how to?
Thanks, folks, Take care.