station. Alarm and status changes shall be displayed within 100
milliseconds after receipt of data by the central station. All graphics
shall be displayed, including graphics generated map displays, on the
console monitor within 5 seconds of alarm receipt at the security console.
This response time shall be maintained during system heavy load.
1.2.18.2
System Heavy Load Definition
For the purpose of system heavy load definition, the system shall consist
of central station equipment, communication controllers and all local
processors as shown. System heavy load conditions are defined as the
occurrence of alarms at the rate of 10 alarms per second distributed evenly
among all local processors in the system. The alarm printer shall continue
to print out all occurrences, including time of occurrence, to the nearest
second.
1.2.19
Environmental Conditions
1.2.19.1
Interior, Controlled Environment
System components, except the console equipment installed in interior
locations, having controlled environments shall be rated for continuous
operation under ambient environmental conditions of 2 to 50 degrees C 36 to
122 degrees F dry bulb and 20 to 90 percent relative humidity,
non-condensing.
1.2.19.2
Interior, Uncontrolled Environment
System components installed in interior locations having uncontrolled
environments shall be rated for continuous operation under ambient
environmental conditions of -18 to plus 50 degrees C 0 to 122 degrees F dry
bulb and 10 to 95 percent relative humidity, non-condensing.
1.2.19.3
Exterior Environment
System components that are installed in locations exposed to weather shall
be rated for continuous operation under ambient environmental conditions of
-34 to plus 50 degrees C -30 to plus 122 degrees F dry bulb and 10 to 95
percent relative humidity, condensing. In addition, the system components
shall be rated for continuous operation when exposed to performance
conditions as specified in UL 294 and UL 639 for outdoor use equipment.
Components shall be rated for continuous operation when exposed to rain as
specified in NEMA 250, winds up to 137 km/hr 85 mph and snow cover up to
610 mm 2 feet thick, measured vertically.
1.2.19.4
Hazardous Environment
System components located in areas where fire or explosion hazards may
exist because of flammable gases or vapors, flammable liquids, combustible
dust, or ignitable fibers or flyings, shall be rated and installed
according to Chapter 5 of the NFPA 70 and as shown.
1.2.19.5
Console
Console equipment, unless designated otherwise, shall be rated for
continuous operation under ambient environmental conditions of 2 to 50
degrees C 36 to 122 degrees F and a relative humidity of 20 to 80 percent.
SECTION 13720A
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