Spectrex 20/20SH - Hydrogen Flame Detector - Manual (Page 9)

Spectrex Inc. - SharpEye TM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005
1
1. Scope
1.1 Product Overview
The Spectrex Model 20/20SH is a special version of the Hydrogen Flame Detector
that is manufactured in S.M.T. Technology. The detector is designed to provide
maximum fire protection in areas where hydrogen fires are likely to occur.
This detector includes sensors with special filters with spectral bands typical to
hydrogen flame emission’s main combustion product - water vapor (H
2
O) - in the
1-4 microns band and reference filters to discriminate background radiation. The
microprocessor design allows for unique field programmability, making the
20/20SH highly immune to false alarms.
The front section of the 20/20SH is sealed to keep the electronic and sensor
chamber dry for longer life. The programmable functions are available through a
RS-485 port used with a standard PC or by hand held computer and software
supplied by Spectrex.
Refer to Manual TM 784050 for instructions to use the HOST software and to
change the required Functions.
1.2 Document Overview
This manual describes the detector and its features and provides instructions on
the installation, operation and maintenance.
This manual is divided into separate chapters as follows:
Chapter 1.
Scope - a general introduction and overview of the product and the
Manual, with a brief description of its content.
Chapter 2. Technical Description - the detector’s theory of operation.
Chapter 3. Performance - the detector features and capabilities.
Chapter 4. Operation - the detector’s operation modes, user interface and
indications.
Chapter 5. Technical Specifications - the Detector’s electrical, mechanical and
environmental specifications.
Chapter 6. Installation Instructions, including wiring and mode setting.
Chapter 7. Operating Instructions and power-up procedures.
Chapter 8. Maintenance Instructions and support procedures.
Appendix A. Wiring Selection Tables for electrical wire selection according
to installation configuration.
Appendix B. Typical Wiring Configurations - wiring diagrams for
installation.
Appendix C. RS-485 Communication Network
Appendix D. Mounting the “EExde” version