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FDS-600 Remote Flame Detector consists of two units：FDS-601 flame detector and FDS-602 control unit.
Introduction
FDS-600 Remote Flame Detector consists of two units：FDS-601 flame detector and FDS-602 control unit.
FDS-601 Flame Detector
FDS-601 flame detector adopts the die-casting aluminum shell, and is equipped
with the internal photoelectric detection and induction circuit. The circuit
uses the logarithmic amplifier to avoid signal overflow effectively.
The detector outputs the flame intensity and frequency to the amplifier by the current, which avoids the long-distance interference and distortion effectively. The probe uses a 4-wire connection.FDS-601 flame detector is a new, safe and reliable detector with the processing structure of the microprocessor.
| Mechanical part | Ambient conditions | |
| Housing material | Die-casting aluminum | Ambient temperature：-20℃ — -80℃ |
| Housing weight | 0.5kg | Humidity:0-95% relative humidity, no condensation |
| Installation method | Screw point | Protection level: NEMA 4X IP66 |
| Electrical part | ||
| Power supply | 24VDC±10%,DC 0.35A | |
| Analog output | 0mA—20mA | |
| Cable specification | 5-core（or 4 core shielded cable) 0.5mm2shielded cable ，with insulation sleeve | |
FDS-602 Control Unit
FDS-602 control unit has the independent built-in 4mA ~ 20mA analog output
module and flame relay, which can adjust the ON/OFF threshold for analog signal
output corresponding to the flame intensity and the dry contact signal of flame
on/off state.FDS-602 control unit is designed with the self-checking function,
which can perform the real-time diagnosis and detection of the operation state
of circuit and program. The 24V power supply and signal output of FDS-602
control unit are connected externally through the terminal block. FDS-602 flame
detection control unit has a six-character alphanumeric LED display and 4
pushbutton style keys, which is convenient for the user to view the operation
parameters and set the parameter values.
FDS-602 control unit can directly communicate with the upper computer which is installed with the flame detector monitoring and management software, so as to realize the visualized flame status display and parameter setting function.
FDS-602 control unit uses the guide rail type installation or fixed installation, convenient for replacement and maintenance.
| Mechanical part | Ambient conditions | |
| Housing material | ABS | Ambient temperature：0℃ — -50℃ |
| Housing weight | 0.4kg | Humidity:0-95% relative humidity, no condensation |
| Installation method | Guide rail | Protection level: NEMA 4X |
| Electrical part | ||
| Power supply | 24VDC±10%, DC 0.35A | |
| Analog output | 4mA—20mA | |
| Maximum load | 750Ω | |
| Contact output | Flame relay; NO; Fault Relay; NC | |
| Contact Rating | 2A 30VDC, 2A 220VDC | |
| Display | Six-Character alphanumeric LED | |
| Operator interface | four pushbutton style keys | |
| Electrical connection | Crimp terminal | |
| Cooling air | ||
| Volume | Straight conduit installation method:5 SCFM Excessive contaminants might require a flow up to 15 SCFM Optical fiber installation method:15 SCFM Tangential-fired boiler：15 SCFM | |
| Pressure | 6kPa | |
| Air source | Clean, Dry, Cooling | |
Principle
FDS-601 flame detector is equipped with a built-in photosensitive device for the collection of the flame signal. The FDS-602 control unit is used to amplify and process the collected signals, so as to judge the existence of the flame by a series of calculation and analysis. FDS-602 control unit can output flame quality information in real-time.
FDS-602 control unit firstly divides the flame signal into 2 channels: the intensity and the frequency signals. The intensity signal represents the brightness of flame, and the frequency signal represents the flame flicker. The frequency signal contains spectrum, bandwidth, peak to peak value and other parameters of the signal. The frequency signal of flame is about 1Hz ~ 200Hz, and the light frequency of coke slag and ash in the furnace is less than 2Hz, so the analysis of the signal frequency spectrum can determine the presence or absence of flame. The FDS-602 control unit processes the signal of flame characteristics through a series of amplification, filtering and calculation of intensity signal and frequency signal, and finally obtains the "flame quality", as a basis to judge the existence of flame.
Installation
Flame Detector Angle
The observation angle and the burner centerline should be set at a small angle
(recommended 5- 10 degree), ensuring maximum monitoring of a flame's initial combustion zone, and obtaining the best observation effect.
Straight conduit installation method
It is a direct-view way to observe the target flame which is viewed through a straight conduit. This method is best suited for water-wall boilers and W-shape burners.
Optical fiber installation method
The target flame can be detected via the optical fiber transmission system with an adjustable observing angle. It's easy to install without installation space limitation. The observing method is applicable for all types of burners in coal-fired power plants.
Features
• Self-checking
• Self-learning
• Alarm signal output available
• Integral and compact design – easy to locate and install
• Equipped with PTFE insulation material - improve the heat resistance and the durability of equipment
•Integrated with a high-performance photosensor
• Remote online tuning and parameters setting
• Able to store 8 sets of files - applicable to different load, different fuel and different combustion technology
• Use explosion-proof technology - suitable for special conditions
Industrial applications
• Power plant
• Petrochemical industry
• Metallurgical industry
• Cement industry
