Sierra Safety Technology, Inc.
www.sierrasafety.com
All rights reserved - © 2016
Page 1 of 20
1. Overview
The RED1 High Speed Detector senses the radiant energy of either a
sudden combustion event or the slower flaming combustion of an average
fire. The detectors covered by this manual use UV, IR, Temperature and
Visible sensors to sense combustion.
Flame detectors usually trigger a relay or output an alarm signal when they
sense a fire. Flame detectors are typically employed if one of the following
applies:
•
The threat area requires a fast response.
•
There is a severe risk.
•
Where other types of detection simply will not or cannot work.
The detector also performs system tests looking for a fault condition that
would impair its ability. Some of the things being checked for include: input
power, sensor circuits, relay circuits, software integrity etc. Some versions
also perform a lens/sensor test to verify sensor operation and general
window cleanliness.
The RED1 detectors have a Fire Relay and a Fault Relay and may have a
Verify Relay and an Aux. Relay. The Fire Verify adds a “field adjustable”
level of certainty to the declaration of a verified fire. The Aux. Relay
activates when the detector determines that the Lens or UV system is not
working properly.
The RED1 detector is mounted in an approved NEMA 4X weather tight
housing. The housing is explosion proof rated for Class I Divisions 1 & 2
Groups B, C, D, Class II Divisions 1 & 2 Groups E, F, G, and Class III
locations. All of the electronics are mounted inside of an aluminum cup to
protect the electronics during installation. All switch settings and indicators
are located on the front of the detector module allowing field adjustments to
be made without removing the detector module from the housing.
With the detector set to maximum sensitivity, it will respond to a 1 square
foot gasoline (heptane) fire on axis at 80 feet in about 5 seconds.
If the "High Speed Disable" switch is turned off, then the detector will
respond to a one-inch-high butane flame at 12 inches in about 50
milliseconds.
The RED1 has user settable sensitivity settings and verify levels.
2. Basic Operation
2.1 General
When the RED1 Detector is powered up, the microprocessor checks the
configuration switch settings, initializes the detector and then executes a
series of self-tests. After the self-test process is completed and all tests
have been passed, the detector is starts looking for a fire.
