For the purposes of this chapter, the term “false alarm” means the activation of a burglary and/or robbery or fire alarm by other than a forced entry or attempted forced entry to the premises, or by other than a fire, and at a time when no burglary or robbery is being committed or attempted on the premises, or when no fire exists on the premises. [Ord. 1796 § 3, 1976; Code 1970 § 9.74.020.]