How consistant are timers?

[rocketsonly]

Hey all, I was wondering how consistant timers can be. For example if you set the timer at 1.9 seconds, but in reality it goes off at 1.92 seconds, will it go at 1.92 seconds every time after if you keep it at the same setting?
-Matthew

 

[edwardw]

Why do you need such accurate timer? I would think setting it to 1.9 and getting +/- .1 second should be good. I mean, ejection delays won't be exactly on engines and neither will ignitions. Seems like that there are other variables that would me more important than having a timer be .02 seconds off.

Edward

 

[Stymye]

most timer vendors list an accuracy figure such as + or - (.xxx)