How often should you replace your calibrator?

[Jodie]

Hi!

Just wondering how often you should replace a calibrator?
Is it just if it doesn't work anymore or does the reliability of it drop?

Thanks! 

[Damien Symonds]

You'd hope that a calibrator would last for at least three years.  Some may last a heck of a lot longer than that, but eventually they might be made out-of-date by software upgrades (eg Operating Systems).

I haven't heard of one whose reliability has faded gradually.  Usually they just stop working.

[Jodie]

Great!

thanks ?