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- Path: sparky!uunet!spool.mu.edu!uwm.edu!psuvax1!psuvm!auvm!MCIMAIL.COM!0001964967
- Message-ID: <91921212062619/0001964967NA2EM@mcimail.com>
- Newsgroups: misc.emerg-services
- Date: Sat, 12 Dec 1992 06:26:00 GMT
- Sender: Emergency Services Discussion List <EMERG-L@MARIST.BITNET>
- From: Daniel Burstein <0001964967@MCIMAIL.COM>
- Subject: fire alarms in dorms
- Lines: 66
-
- The problem of people making fake alarm calls (technically referred
- to as "malicious false alarms") is not only an issue in campus
- dorms, but also a very real problem in most cities. In NYC, for example,
- roughly onethird of fire alarms are MFAs.
-
- There are ways to safely REDUCE (never eliminate) this problem, and
- basically youse pays your money and you takes your choice.
-
- A few techniques:
- a) The actual pullbox can be enclosed in a second, "overbox", made
- (usually) of transparent plastic. Pulling the cover sets of a LOCAL
- buzzer which gets imemdiate attention from anyone in teh area.
- ALSO, the material can be dusted for fingerprints for an
- after-the-fact.
- b) The pull box can be replaced, or supplanted, with a voice
- respons system. With this type of arrangement, teh person
- pushes a button and then is questioned.
- c) you can even go to having television cameras monitor each box...
-
- there are pluses and minuses in each. The biggest single problem
- is that the "cost" if people don't set off (or pay attention to!) a
- legitimate alarm can be VERY high. That's why even the most
- MFA'ed boxes in NYC (and there are some which may get five a day)
- stillget some sort of response.
-
- The basic issue comes down to someone having to figure out the
- cost, and come up with the right amount of money. Unfortunaelty,
- schools tend to consider stuident life disruptiona relatively low
- priority, so they'll spend little money. If, on teh other hand,
- each alarm was transmitted to the fire deparment, and they
- had authority to fine the campus $10,000 for each MFA, you'd quickly
- see some more safeguards in place.
-
- ----------------
-
- Note that this is VERY different from what I'll call a "good intentions"
- alarm. For example, someone may smell what they think is smoke, but
- it really was just some brain cells burning from heavy studyimg.
-
- ------------------
-
- In regards to smoke detectors going off at the wrong times... There
- are TWO different techniques used to detect fire (in common civilian
- situations). There are smoke detectors, and there are temperature
- (heat) detectors. The heat sensors are pretty immune (if properly
- installed, of course) to false alarms. the problems are with teh
- smoke units.
-
- They can be "fooled" by anything that produces either an increase
- in particulate material (i.e. smoke) in the air, or by anything
- which reduces the light flow through the air.
-
- The problem is that you WANT them to be very sensitive. Making
- them selective, though, is pretty tricky. There are computer
- algorithyms in place which will do things like compare smoke
- density changes, but the risks of "missing" real smoke
- are just too high.
-
- So the way to prevent cooking from setting the off is simple:
- a) don't burn your food
- b) have an exhaust vent.
-
- ----------------
-
- take care,
- <dburstein@mcimail.com> <----direct e-mail address
-