Linear DXS-80, Руководство пользователя

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SECTION 3
LINEAR LLC
FCC ID: EF4 SST00116
1.0 GENERAL DESCRIPTION
The DXS-80 is a battery powered, low profile, UL Listed carbon monoxide
detector with an RF transmitter. The DXS-80 mates the System Sensor W3-CO
detector with a Linear DX coded transmitter. The transmitter is connected to the
W3-CO via a four pin header on the detector’s main PCB. The W3-CO provides
power, ground and signals for alarm and low battery to the transmitter. The DXS-
80 is intended for use with Linear security and personal reporting consoles such
as the DVS-2400, DUAL-824, PERS-2400 and PERS-3600.
1.1 POWER
SUPPLY
One lithium cell, type CR123A, provides power to both the detector and
transmitter at a nominal voltage of 3.0 VDC. Batteries manufactured by Duracell,
Panasonic, Varta and Sanyo will be listed for use in this product.
The detector with the RF transmitter will operate until end of life, 6 years, at room
temperature without battery replacement.
2.0 DETECTOR
CHARACTERISTICS
2.1 CO TECHNOLOGY
The W3-CO utilizes an electrochemical CO sensing element, and therefore has
certain performance limitations. The CO sensing element has a typical life of 6
years from the date of manufacture. The CO sensing element has a carbon filter
that provides resistance to false alarms caused by cross-interference gasses, but
the filter can be saturated, and so the product should not be installed in locations
where high concentrations of these gasses are present. Cross-interference
gasses include, but are not limited to: Methane, Butane, Heptane, Ethyl Acetate,
Isopropyl Alcohol, Carbon Dioxide, Ammonia, Ethanol, Toluene, Trichloroethane,
and Acetone. Only a cloth moistened with water should be used to clean the W3-
CO housing. The movement of gases into the sensing element can be impaired if
a sealant blocks the porous surface of the CO sensor. The W3-CO should not be
exposed to aerosol products such as furniture polish, paint or varnish that can
coat the CO sensing element and render it inoperative.
2.2 MICROCONTROLLER
This microcontroller features a 10 bit ADC for interfacing to CO sensing circuit.
During normal operation, the microcontroller is powered down with an external
crystal used as a wake up timer. The detector will wake up and sample the CO
sensing circuit every 10 seconds.
2.3
CO SENSING CIRCUIT
The CO sensing circuit is continuously powered. The output of the CO circuit is
sent to one of the inputs of the 10 bit ADC aboard the microcontroller.