I get too many email notifications about printers going into error

I have set up the email notification function to tell me and my staff when a printer goes into error.  But usually someone is near the printer and fixes it before I can respond, which is great, but I don't know if that has happened or not when I see the email a half hour later.  I would like to set up the notification so that it only sends me an email if the printer has been in error for more than a half hour..