After checking a mezuzah

Hi,

One who removes his mezuzah for checking does not recite a new berachah upon putting it back up, assuming no problem was found with the mezuzah.

(Rivivot Ephraim 1:19)

[Note: If the mezuzah remains off for more than a few hours, we do require a new berachah, but the precise duration to trigger a berachah is unclear to me. I did see that http://www.torah.org/advanced/weekly-halacha/5763/kiseitzei.html addresses this question.]

Have a great day,
Mordechai