Affirmed. See State v. Alvarino, 585 So.2d 1094, 1095 (Fla. 3d DCA 1991) (holding that there is no requirement that a *133measuring device used to determine that a drug sale took place within 1,000 feet of a school must be previously calibrated or otherwise independently tested for accuracy).
TAYLOR, HAZOURI and CONNER, JJ., concur.