IPES-IR3 Flame Sensor

By Tim Quine

ENGR 518

Purpose • Detect fires in industrial applications such

as refineries, paint productions, oil and gas boilers.

• Send alarm signals to user’s receiving devices or alarm systems.

• This is done via closed loop current signals.

Device Characteristics

• Enclosure Material – Stainless Steel Grade 316 or Aluminum 6061

• Weight – Stainless Steel 11 lbs. or

Aluminum 5.5 lbs.• Cable – 6,200 ft. (18 AWG)

Device Components

IR Detectors

LED Status Lights

Explosive ProofCasing

Differential Signaling Lesson

RS232 RS423 RS422 RS485

Differential no no yes yes

Max number of drivers 1 1 1 32

Max number of receivers 1 10 10 32

Modes of operation half duplexfull duplex

half duplex half duplex half duplex

Network topology point-to-point multidrop multidrop multipoint

Max distance (acc. standard) 15 m 1200 m 1200 m 1200 m

Max speed at 12 m 20 kbs 100 kbs 10 Mbs 35 Mbs

Max speed at 1200 m (1 kbs) 1 kbs 100 kbs 100 kbs

Max slew rate 30 V/μs adjustable n/a n/a

Receiver input resistance 3..7 kΩ ≧ 4 kΩ ≧ 4 kΩ ≧ 12 kΩ

Driver load impedance 3..7 kΩ ≧ 450 Ω 100 Ω 54 Ω

Receiver input sensitivity ±3 V ±200 mV ±200 mV ±200 mV

Receiver input range ±15 V ±12 V ±10 V –7..12 V

Max driver output voltage ±25 V ±6 V ±6 V –7..12 V

Min driver output voltage (with load) ±5 V ±3.6 V ±2.0 V ±1.5 V

Device Specifications

• Detection type – optical via multiple spectrum IR Source.

• Spectral Range – three points in the

4.0 to 5.0 micrometer range.• Power – 24 VDC nominal (3 Watts)• Operating Temp Range (-40 to 185 )• Impact Resistance – 1.9 Joules• field of vision

Square Law and Wavelengths

Signaling• Outputs – Industry Standard 4-20 mA +/-

0.1 mA, 2 alarm relays, digital and analog.State IR3 Status

Fire Relay State Fault Relay Status

Output signal, mA

LED Status ConditionNormally open

when energizedNormally closed when

energized

1No power supply

voltage Open Open 0 Off

2

After switching on during 45 sec.

Open Open 2

Continuous green LED light for first 10 sec, then flashing

green LED

3Fault or optical

interference (dust) Open Open 2Alternate flashing of the

yellow and green LED lights

4Normal (no faults or fire

during operation) Open Closed 4Continuous lighting of the

green LED light

5 Fire Closed Closed 18 Continuous red LED light

6Fire & Fault

Closed Open 8Alternate flashing of the

yellow and green LED light

7Test mode (magnetic

collar is on) Open Open 2Magnetic collar is on. Fire

relay is blocked

SensitivityFuel Distance Fire Size Avg. Time

N-Heptane 211 1 ft x 1 ft 9 sec

Methanol 151 1 ft x 1 ft 9 sec

Ethanol 151 1 ft x 1 ft 11 sec

Diesel 151 1 ft x 1 ft 15 sec

Diesel 151 2 ft x 2 ft 10 sec

Gasoline 175 1 ft x 1 ft 10 sec

JP-4 201 1 ft x 1 ft 10 sec

JP-4 206 2 ft x 2 ft 10 sec

Methane 151 3/8’’ x 3‘ 10 sec

Source Distance

1.5 kW Heater 3 ft

Arc Welder, 200A. 3/16’’ – 7018 electrode

9 ft

Fluorescent (2) 20W (6000 Lux)

0 ft

Halogen, 500W 3 ft

Incandescent, 100 W 2000 LUX

1 ft

Direct Sunlight No alarm

Indirect Sunlight No alarm

Stimuli modulated at 1.5 Hz and also un-modulated

Field of vision

Probability Review

• Times recorded previous slide• • Range for 50 % of future

measurement would fall in

eqn: Range between 9.16 and 11.72 seconds

Times

9 sec

9 sec

11 sec

15 sec

10 sec

10 sec

10 sec

10 sec

10 sec

False Alarms

• Cost industries money due to down time .• Must know difference or the result

could be catastrophic.• Uses microprocessor,

algorithms, multiple

sensors and wavelength

range settings.

Competitors Technologies

• Bimetal thermal switches• Computer Imaging Programs• Smoke detectors• SAFE air sample analysis

My Future Uses

• Compressed Air Foam System• Small scale flame sensors• Detecting all fires

References

• http://www.espsafetyinc.com/esp/cms/userfiles/files/IPES-IR3rep-WEB-100512.pdf

• http://www.espsafetyinc.com/cms/userfiles/files/IPES%20IR3%2003_28_2012.pdf

• http://www.espsafetyinc.com/IPES-IR3-multi-spectral-flame-detector.php

**All images in powerpoint are from Google Images**

Questions?