Ansul SharpEye 20/20MI-32-S-F Operating instructions
SharpEye 20/20MI-32-S-F
TRIPLE IR (IR3)
FLAME DETECTION SYSTEM
User and Maintenance Manual
006848
REVISION RECORD
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DATE PAGE REV. NO. DATE PAGE REV. NO.
Indicates revised information.
Section Page
______ ____
Introduction 1
Technical Features 2 – 3
Performance 4 – 6
Operation 7 – 8
Electrical Specifications 9
Mechanical Specifications 10
Environmental Specifications 11
Installation Instructions 12
Operating Instructions 13
Maintenance Instructions 14
TABLE OF CONTENTS
CAUTION
This manual should be carefully read by all individuals who have or will have responsibility for using, maintaining or servicing the product.
The Detector is not field-repairable due to the meticulous alignment and calibration of the sensors and the respective circuits. Do not
attempt to modify or repair the internal circuits or change their settings, as this will impair the system's performance and void the Ansul
Incorporated product warranty.
INTRODUCTION
The Model 20/20MI-32-S-F is a Triple IR spectrum flame detector designed to provide maximum fire protection. It uses innovative tech-
nology of advanced digital signal processing to analyze the dynamic characteristics of fire. Three sensitive IR channels process the
signals. Detection performance is controlled by a microprocessor and easily adapted to all environments, applications and requirements.
The result is a unique and superior flame detector, which provides excellent detection sensitivity with extreme immunity to false alarm.
Although there are more than one basic model of the 20/20MI Triple IR flame detector and each has numerous features, only the models
20/20MI-32-A-F* and 20/20MI-32-S-F features are applicable to vehicle fire protection using the CHECKFIRE SC-N detection module.
Only the 20/20MI-32-S-F features are addressed in this manual.
APPROVALS
20/20MI-32-A-F: Aluminum housing, FM Approved
20/20MI-32-S-F: Stainless steel housing; FM Approved
* 20/20MI is the base detector model number. Additional numbers and letters represent options:
20/20MI-3 =Short Range (8.2-33 ft.) (2.5-10m)
20/20MI-32 =Plug Outlet
20/20MI-32-S =Stainless Steel Housing
20/20MI-32-S-F =FM Approved
INTRODUCTION
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REV. 1
TECHNICAL FEATURES
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REV. 2
1 TECHNICAL FEATURES
• DETECTION RANGE: up to 33.0 ft (10 m) for a 1 ft2(0.1 m2)fire.
• ULTRA HIGH IMMUNITY TO FALSE ALARMS: (see para. 2.3).
• ADVANCED DIGITAL PROCESSING OF THE DYNAMIC CHARACTERISTICS OF FIRE: Flickering, Threshold correlation and
Ratio.
•THREE SEPARATE IR CHANNELS: Between 3-5 microns.
• TWO RESPONSE LEVELS: Warning & Detection.
• SOLAR BLIND
• MICROPROCESSOR BASED: Digital signal processing.
• BUILT IN TEST: Manual BIT
• CERTIFICATION: FM Approved with CHECKFIRE SC-N Electric Detection and Actuation System
1.1 PRINCIPLES OF OPERATION
1.1.1 Hydrocarbon fire detection
The triple IR flame detector detects all conceivable types of hydrocarbon fires, i.e. any fire, which emits CO2.
1.1.2 Identifying the CO2peak
The hydrocarbon fire is characterized by a typical radiation emission. The CO2peak emits intense radiation in the spectral
band between 4.2 µ – 4.5 µ and weaker radiation intensity outside this spectral band.
1.1.3 The limitations of IR-IR flame detectors
CO2in the atmosphere attenuates the radiation in this spectral band. (Absorption and emission of radiation always occur in
the same band.) As a result, the greater the distance between the detector and the fire, the weaker the intensity of the radia-
tion reaching the detector (the CO2attenuation increases). This phenomenon explains the limitations of the existing IR-IR
flame detectors in the market:
• Detection distance is restricted to 10 meters (33 ft) only.
• Their immunity to false alarm sources is limited.
1.1.4 The advantages of IR3technology
IR3technology overcomes these limitations by an innovative concept of utilizing an additional detection channel. Three chan-
nels collect more data from the environment, permitting more accurate analysis and better performance. After careful investi-
gation, three channels were selected which, when operating jointly,provide optimal fire detection characteristics:
Channel 1: 4.2 µ – 4.6 µ
Fire – the CO2peak.
Channel 2: 4.0 µ – 4.2 µ
Eliminates false alarms from high temperature sources.
Channel 3: 4.8 µ – 5.2 µ
Eliminates false alarms from flickering of background radiation.
Most IR sources, which create misleading IR alarm stimuli, including the sun, incandescent and halogen lamps, electric arc
discharges, electrical heaters, etc., do not possess this unique spectral signature of fire. The IR sensors of the detector
respond only to flickering of radiation signals. The signals are compared to a predetermined threshold. Processing of the
results from the three IR channels is performed by the board microprocessor.The result is a much greater detection distance
and a highly increased ability to distinguish between fire and false alarms. This sophisticated technology surpasses all other
existing flame detection techniques on the market today. Further enhancement of this triple IR analysis enables the accurate
detection of a hidden or smoldering fire where the radiating flames are not visible, but the emitted hot mass of CO2gases is
detected.
This unique flame analysis capability (patent pending) has been incorporated into the Triple IR fire detector.The
result is a unique flame detector, which does not produce false alarms and provides at the same time detection over
greatly increased distances.
1.1.5 Model
The model, 20/20MI-32-S-F, is a short range, fast detection type with a range up to 33.0 ft (10 m).
The 20/20MI-32-S-F has a stainless steel housing.
FIGURE 1: IR3FLAME DETECTOR
TECHNICAL FEATURES
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PERFORMANCE
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REV. 1
FIGURE 2: FLAME DETECTOR ASSEMBLY–OUTLINE DRAWING
WITH CONNECTOR OUTPUT
2PERFORMANCE
2.1 DETECTION SENSITIVITY
Detection sensitivity is the detection distance for a specified size of fire and type of fuel ("Standard Fire") within a given time from
the ignition of the fire.
Standard Fire:
A1ft2/(0.1 m2)Gasoline pan fire with max. wind speed of 6.5 ft/sec/(2 m/sec).
Sensitivity Range:
The sensitivity is factory set at 10 (33 ft. (10 m)) with a response time of 3 seconds.
VIEW A
006849
NO. 6-32UNC-2B
FOR GROUND CONNECTION
NO. 10-32UNF-2B
4PL.
DIA .275 IN. (7 mm)
2PL.
IR SENSOR
REFLECTOR
STATUS LED
IR SENSOR
IR SENSOR
A
4.3 IN.
(110 mm)
2.5 IN.
(63.5 mm)
2.6 IN.
(65.5 mm)
3.9 IN.
(98.6 mm)
3.9 IN.
(98.6
mm)
Other fuels
The detector will react to other types of fires as follows:
PAN FIRE SIZE: 1 ft2/(0.1 m2)
MAXIMUM WIND SPEED: 6.5 ft/sec (2 m/sec)
MAXIMUM RESPONSE TIME: 10 sec
Table 2.1.2: Sensitivity to other fuel types
2.2 CONE OF VISION
Horizontal: 100°
Vertical: 100°
Relative Range as a Function of the Incidence Angle
FIGURE 3: HORIZONTAL AND VERTICAL FIELDS OF VIEW
PERFORMANCE
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TYPE OF FUEL % OF MAX. DISTANCE AT EACH SENSITIVITY RANGE
GASOLINE 100%
N-HEPTANE 100%
ALCOHOL 75%
JET FUELS 75%
KEROSENE 75%
DIESEL FUEL 70%
HYDRAULIC FLUID 70%
METHANE* 30%
PROPANE* 30%
*0.5 m plume fire
006850
RELATIVE RANGE
100%
90%
80%
70%
60%
50%
10 DEG
20 DEG
30 DEG
35 DEG
40 DEG
45 DEG
60 DEG
–10 DEG
–20 DEG
–30 DEG
–35 DEG
–40 DEG
–45 DEG
–50 DEG
–60 DEG
50 DEG
PERFORMANCE
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2.3 FALSE ALARM PREVENTION
The detector will not provide an alarm or a warning signal as a reaction to the radiation sources specified below.
NOTES:
IAD = Immune at Any Distance
All sources are chopped from 0 to 20 Hz.
Table 2-3.1: Immunity to False Alarm Sources
Table 2-3.2: Welding Immunity Distance – 20/20MI-32-S-F
RADIATION SOURCE IMMUNITY DISTANCE FT (M)
Sunlight IAD
Indirect or reflected sunlight IAD
Incandescent frosted glass light, 100 W IAD
Incandescent clear glass light, rough service, 100 W IAD
Fluorescent light with white enamel reflector, standard office or shop, 40 W (or two 20 W) IAD
Electric arc [12mm (15/32 in) gap at 4000 V alternating current, 60 Hz] IAD
Arc welding [4 mm (5/32 in) rod; 240 A] See Table 2-3.2
Ambient light extremes (darkness to bright light with snow,water, rain, desert glare and fog) IAD
Bright colored clothing, including red and safety orange. IAD
Electronic flash (180 watt-seconds minimum output) IAD
Movie light, 625 W quartz DWY lamp (Sylvania S.G.-55 or equivalent) 6.5 (2)
Flashlight (MX 991/U) IAD
Radiation heater,1500 W IAD
Radiation heater,1000 W with fan IAD
Quartz lamp (1000 W) 10 (3)
Mercury vapor lamp IAD
Grinding metal IAD
Lit cigar 1(0.3)
Lit cigarette 1(0.3)
Match, wood, stick including flare up 10 (3)
SENSITIVITY DETECTION RANGE IMMUNITY DISTANCE
10 33 ft (10 m) >10 ft (3 m)
3 OPERATION
3.1 VISUAL INDICATIONS
One 3-color LED-indication is located in the detector front window:
FIGURE 4: INDICATION LEDS
3.2 OUTPUT SIGNALS
The detector controls the following outputs:
• Alarm relay
• Fault relay
The detector can be in one of the following states.
In each state, the detector will activate different outputs as specified in table 3-2.1.
OPERATION
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DETECTOR STATUS LED COLOR LED MODE
Fault, BIT Fault Yellow 4 Hz flashing
Normal Green 1 Hz flashing
Warning Red 2 Hz flashing
Alarm Red Steady
NORMAL: The detector is functioning normally.
MANUAL/
AUTOMATIC BIT: The detector performs a Built In Test.
WARNING: Fire detected – warming alarm (prealarm) state
ALARM: Fire detected – fire alarm state
MANUAL/
AUTOMATIC BIT
FAULT: A fault is detected during BIT sequence.
FAULT: A fault is detected when the power supply is too low or during a software
fault.
STATUS LED
006851
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