A715/IR3 Point Infrared Flame Detector Three-Band Infrared

 1. Function and composition of A715/IR3 point infrared flame detector

A715/IR3 point-type infrared flame detector can be used in places where flames (including partial smoldering fires) need to be monitored, quickly discovering flames that may cause fires, and issuing fire alarms in time.

A715/IR3 infrared flame detector converts flame combustion parameters into electrical signals through three infrared pyroelectric sensors working in different bands, and inputs the signals into industrial computing chips for comparison, calculation and analysis processing, and cooperates with special intelligent control software. Fire alarms are issued quickly and accurately.

The A715/IR3 infrared flame detector adopts a special aluminum die-cast flameproof housing, which has good explosion-proof and protective characteristics, corrosion resistance and aging resistance, and can work indoors, outdoors and various special industrial places for a long time.
2. A715/IR3 point type infrared flame detector shape structure and size

In order to meet the detector's long-term stable operation and explosion-proof requirements, the A715/IR3 uses an aluminum die-casting shell. The casing is divided into a shell and a bottom cover.

In order to ensure the explosion-proof performance, the shell and the bottom cover are connected by threads, and a rubber sealing ring is installed on the connection surface.

Both the wire inlet hole and the installation hook are set on the shell to facilitate the wiring operation.

A plastic inner shell is used to fix and protect the circuit part. Only three infrared flame sensors and indicator lights are exposed on the front panel of the inner shell, and only the wiring terminals are exposed at the rear to prevent damage to the circuit during installation and wiring.


 
3. Technical parameters of A715/IR3 infrared flame detector

1. Basic parameters of A715/IR3 point infrared flame detector

Item Specifications
Name Point Infrared Flame Detector
Model A715/IR3
Executive standard GB15631-2008 "Special Fire Detector"
●GB3836.1-2000 "Electrical Equipment for Explosive Gas Atmospheres" Part 1: General Technical Requirements
●GB3836.2-2000 "Electrical Equipment for Explosive Gas Atmospheres" Part 2: Flameproof "D"
Sensors Sharp Detection AE-S708/3, AE-S708/4 and AE-S708/5 Infrared Pyroelectric Sensors
Optical window white sapphire (Al2O3)
Housing ●Material: Aluminum alloy
●Molding process: Die casting
●Coating process: surface electrostatic powder spraying, internal metal passivation treatment
Weight ≤1kg
Explosion-proof and protection Explosion-proof: EXdⅡCT6
●Protection: IP66

2. Working parameters of A715/IR3 point infrared flame detector

Item Specification or Status
Power Supply Minimum Standard Maximum
18VDC (customizable 12VDC) 24VDC 30VDC
Working current Monitoring state ≤ 15mA, alarm state ≤ 35mA
Warm-up time 60s after power on
Fire alarm When a flame (including partial ignition fire) is found in the monitored area, the detector enters the fire alarm state;
The fire alarm output relay acts, and the red fire alarm indicator lights up
Fault alarm When the sensor, power supply, etc. are found to be abnormal, the detector enters the fault alarm state;
The fault output relay acts, and the yellow fault indicator lights up;
When fire alarm and fault occur at the same time, fire alarm takes priority;
Alarm threshold 1-5 levels adjustable (factory set to 3 levels)
The number of times the green light flashes each time in the monitoring state indicates the alarm threshold
Alarm delay 0-30s adjustable (factory set to 0s)
Drift compensation sensor hardware compensation and intelligent software compensation combined mode
It can effectively compensate the drift caused by temperature, environmental changes and long-term work of components
Interference source suppression Can effectively suppress the influence of non-flame interference sources, such as sunlight (direct and reflected), common artificial light sources, background radiation sources, hot moving objects, electric welding, etc.
Indicator light Monitoring status: green light flashing
●Fire alarm status: the red light is always on
●Fault status: the yellow light is always on
Output Fire alarm relay, action when alarming, output contact 1A@30VDC1A@250VAC
●Fault relay, action when fault occurs, output contact 1A@30VDC1A@250VAC
●4-20mA current loop
●Serial communication interface

4. Detection performance and protection range of A715/IR3 infrared flame detector

Maximum detection distance D(max)
Fire source situation A715/IR3 red ultraviolet flame detector maximum detection distance D(max)
Gasoline 0.1㎡ fire plate (0.3m*0.3m)

55m
n-heptane

55m
diesel fuel     

50m
kerosene

50m
aviation kerosene

50m
Alcohol     

50m
Isopropanone

50m
Methanol 45m
Polypropylene 20m
Paper 35m
Methane 0.5m(H)*0.2(w) gas flame 35m
LPG propane

  illustrate:

1. The central axis in the above figure is perpendicular to the detection window;

2. The vertical and horizontal directions of the detection area in the "Schematic Diagram of Detection Area" are consistent;

3. The above figure shows that the 100% position is the maximum detection distance D(max), and the detection distance of each angle can be obtained from the figure

4. Calculated by multiplying the percentage of the upper black edge by D(max);

5. The maximum detection distance D(max) in various environments is detailed in the above table
5. Environmental parameters of A715/IR3 point infrared flame detector

Item Specifications
Working temperature -10℃~+55℃
Working humidity ≤95%HR, no condensation
Storage temperature -20℃~+60℃

6. Setting and recording

Project Description
Setting Using PC and special software, the alarm parameters of the detector can be set through the serial communication port:
●Alarm mode
●Alarm threshold
●Alarm delay time
Professional operation and password authorization are required
Easy setting Use the magnet at hand to control the built-in reed switch to adjust the alarm sensitivity
Record query Using PC and special software, the internal record of the detector can be queried through the serial communication port
●Factory settings: alarm threshold, delay time.
●User settings (default factory settings): alarm threshold, alarm delay time.
●Factory functions: maintenance, calibration, compensation parameter information, qualified identification, software version, product ID, etc.
Professional operation and password authorization are required

7. Main circuit and software of A715/IR3 point infrared flame detector

The circuit part mainly includes sensors, low-noise amplifiers, industrial processing units, peripheral input and output and drive circuits, power supplies and EMC circuits, etc.


The MCU has built-in special software program, which uses Anyu's three-band infrared flame detection algorithm and criterion rules.