FALSE LOW ALT WARNING CAUSES ACR GO AROUND WITH 25 MINUTES EXTRA FLT TIME TO REPOSITION FOR SECOND APCH. ATCT LCL CTLR SAYS FALSE WARNINGS ARE FREQUENT ON THIS APCH.

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ON APCH TO PHL RWY 27R; 11/SUN/88; AT 500' WITH ACFT INSTRUMENTATION INDICATING ON COURSE AND GLIDE PATH; THE FEMALE TWR CTLR ADVISED TWICE IN SERIOUS TONE TO CHECK OUR ALT IMMEDIATELY THAT SHE HAD AN ALT ALERT THAT WE WERE 1 MI AND 500'. OUR INDICATIONS AGREED WITH THE WARNING. VISIBILITY WAS 1/4 MI WITH 6000 RVR ON 27R. BECAUSE WE WERE AT THE EXACT POINT SHE SAID WE WERE AND WE COULD NOT ASSESS IF WE HAD A PROBLEM; WE EXECUTED MISSED APCH PROCEDURES TO ASSESS PROBLEM. SHE ASKED IF WE NEEDED ANY ASSISTANCE. WE REPLIED NO; BECAUSE ALL OUR INDICATIONS; AFTER CHECKING AND IDENTIFYING ALL RADIOS; APPEARED TO BE NORMAL. WE WERE THEN TOLD BY CTLR THAT FALSE ALERTS WERE COMMON IN THAT PARTICULAR AREA; BUT THEY WERE REQUIRED TO ISSUE THEM ANYWAY. THIS ISSUANCE OF FALSE ALERT WAS VERY DISCONCERTING; TO SAY THE LEAST. WE WERE THEN VECTORED FOR ANOTHER APCH; BEING ABOUT #15; IT TOOK ABOUT 25 MINUTES. WE WERE IN HEAVY TURB AND WINDSHEAR CONDITIONS. A CLOSELY MONITORED APCH AND LNDG WERE MADE; EVERYTHING BEING NORMAL. FUEL WAS NOT A PROBLEM AS WE HAD TAKEN FULL TANKS FROM TAMPA. I FEEL THIS FALSE ALERT CREATED AN UNNECESSARILY BAD SITUATION.