microsoft power point - infra red open path gas detectors haven
TRANSCRIPT
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Zellweger Analytics LtdZellweger Analytics Ltd
Presentation
Prepared for Petronas
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Transmitter
Measure
Reference
100%
<100%
Receiver
Measuring wavelength is absorbed by a wide range of hydrocarbons
reference not absorbed
CH
H
H
H
Infra Red Measurement
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Sieger Searchline ExcelSieger Searchline Excel
The Ultimate Infrared Open Path Gas Detector
The Ultimate Infrared Open Path Gas Detector
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What is an LEL.m
All of these clouds have a Total Path Concentration of 1LEL.m
Industry reports says : Minimum size of a gas cloud which can do any Structural Damage is 5 Metres
Standard Alarms
A1 = 1 LEL.m
A2 = 3 LEL.m
LEL.m indication gives ‘worst case’indication (e.g. all the gas present in 1 metre )
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SIMPLE - From the above table, if we have a gas cloud of 8 metres distance with a
concentration of 50% LEL, multiply the two to obtain 4 LELm.
LELm
1 metre 2 m 3 m 4 m 5 m 6 m 8 m 10 m 12 m 16 m 100 m
1 LELm 100% 50% 33.33% 25% 20% 16.66% 12.50% 10% 8.33% 6.25% 1%
2 LELm 100% 66.66% 50% 40% 33.33% 25% 20% 16.66% 12.50% 2%
3 LELm 100% 75% 60% 50% 37.50% 30% 25% 18.75% 3%
4 LELm 100% 80% 66.66% 50% 40% 33.33% 25% 4%
5 LELm 100% 83.33% 63% 50% 41.66% 31.25% 5%
6 LELm 100% 75% 60% 50% 37.55 6%
8 LELm 100% 80% 66.66% 50% 8%
10 LELm 100% 83.33% 62.50% 10%
12 LELm 100% 75% 12%
16 LELm 100% 16%
Distance
% LEL
Similarly - 5m multiplied by 40% LEL gives 2 LELm.
LEL Meters V LEL comparison
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Pipeline Pipeline
Leak
Lower concentration
Higher concentration
Positioning of Open Path Detectors
Imagine the gas escape shown below:
Both Open Path Systems
will indicate a similar
Level.
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Benefits of Open Path Infrared Gas Detection
• Reduces quantity of devices
• Reduces cabling & I/O count
• Reduces Power Consumption of F&G System
• Lower maintenance
• No calibration gas required
• Completely fail-to-safe
• Immune to all known poisons
• Faster Response to gas than point detectors
• Compliments point detectors for complete coverage
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Searchline Excel system
• Transmitter / Receiver configuration
• Path Lengths from 5 metres to 200 metres
• Gas cloud measuring range of 0 LELm to 5 LELm
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IR Source
Gas Cloud
Detector Array
SAMPLE
REFERENCE
RAIN
FOG
DIRT
SNOW GAS CLOUDSAMPLE
REFERENCE
SIGNAL RATIODe
tec
tor
Ou
tpu
t
Time
Principle of Detection
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Digital Signal Processing
Super fast Digitizing,Features include:
• Learns time of next pulse• Allows ‘Lock & Key’ sampling• Rejects bad signals• Immune to vibration• Manages power for opticalwindow heating
• No False Alarms
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Dual Waveband Reference
R1 S R2
2.1 2.3 2.5microns
sig
nal str
en
gth
water vapour
• Water vapour gives a non-linear
response depending on water droplet size.
• EXCEL measures two references ,
one either side of the Sample Wavelength.
• With 2 reference wavelengths,
there is NO risk of false alarmsin bad weather conditions.
= Actual Reference.• R1 + R2
2
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Analogue Output Signal
� Linear 0 to 5 LELm 4 to 20 mA
� Dirty Optics Pre-Warning 3 mA *
� Beam Blocked 2.5 mA *
� Inhibit 2 mA *
� Fault <1 mA( * = User configurable)
4mA
20mA
0mA
3mA
RED = 24 VOLTSBLACK = 0 VOLTS COMMONWHITE = ANALOGUE SIGNALORANGE = RS485 +BLUE = RS485 –GREEN = EARTH / GROUND
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Analogue Output
Searchline Excel Gas Response
0
10
20
30
40
50
60
70
0 1 2 3 4 5
LEL.m
Rela
tive R
esp
on
se
Methanol
Ethane
Propane
MethaneButaneEthylene
EthanolPropyleneButadien
Pentane
Hexane
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Installation example
Brunei Shell, Champion 7
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Offshore Platform Application
Brunei Shell, Champion 7
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Offshore Platform Application
Maui A Platform
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Offshore Platform Application
BP Yanchen 13-1
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Offshore Platform Application
BP Yanchen 13-1
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Offshore Platform Application
BP Yanchen 13-1
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Offshore Application
“Esperdate” FPSO
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Rankin ‘AWoodside
Offshore Installation
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Onshore Application
Seria Crude Oil Terminal, Brunei
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Instrument Assisted Alignment
1. Line of Sight Telescope
Alignment and Conformity Kit
2. Hand held Interrogator
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Telescope/Mounting Bracket
� Robust shock resistant design
� High power rifle telescope
� Greater magnification and zoom
� Greater accuracy
� Stronger telescope mounting bracket
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Mounting Datum
� New mounting datum
� Ensures correct mounting of telescope to Excel Unit
� Three points for maximum flatness and accuracy
New mounting Datums
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Handheld Alignment software
� Simple to use bar graph� The first line of the display
shows the magnitude of the
current signal level as a bar
graph - SIG.
� The second line of the display
shows the target signal level
received as a bar graph -
TGT.
� Use the horizontal and vertical
adjustment screws on the
transmitter and receiver units
to maximise the bar graph SIG
(signal) value.
� Only allows system to go active
if the target signal level is met
or exceeded
� If signal is too low it displays
� Once optimum alignment is
achieved it displays
� No chance of poor alignment
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Available systems
5 to 40 metres
40 to 120 metres
120 to 200 metres
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Reference ListReference List
USER SITE QTY Offshore
Woodside Australia Rankin “A” platform 20 �
BP Nam Con Son 28 �
EPMI / Petronas Carigali ANGSI development 43 �
Brunei Shell Petroleum Champion 7 platform 103 �
Petro Vietnam GUP 2 Gas processing 10
Esso, Singapore Ayer Chawan Refinery 14
Shell, Singapore Bukom Refinery 7
Brunei Shell Petroleum Special Crude Oil Terminal 3
Shell, Sarawak Berhad, Malaysia E11 Platform 22 �
Shell, Sarawak Berhad, Malaysia B11 Platform 30 �
Phillips Petroleum, Australia Bayu Undan Field 55 �
Petronas Carigalli / Triton Oil Cakarewala 50 �
Malaysia LNG MLNG 40
Shell Philippines Malampaya 35 �
Brunei Shell Petroleum Ampa Fairley Rationalisation 35 Both
BP, Arco China Y13 platform 80 �
Conoco Belanak Platform and FPSO 145 �
SOUTH ASIA PACIFIC, TROPICAL REFERENCESSOUTH ASIA PACIFIC, TROPICAL REFERENCES
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Installation Options
� Option 1
� Optima/DVC100(M) or
DX100(M) /Controller
� Non Intrusive
Interrogation
� Redundant signals to
controller
� Remote status via
Modbus at SCADA
� Local Interrogation via
SHC1
Hazardous Area Safe Area
4-20mA
4-20mA
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Installation Options
� Option 2
� Optima/DVC100(M) or
DX100(M) /Controller
� Non Intrusive
Interrogation
� Redundant signals to
controller
� Remote status via
Modbus at SCADA
� Local Interrogation via
SHC1
Hazardous Area Safe Area
SCADAModbus
4-20mA
4-20mA
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Installation Options
� Option 3
� Optima/DVC100(M) or
DX100(M) /DCS or PLC
� Remote Status to
DCS/PLC via multi drop
Modbus
� Local non intrusive
Interrogation via SHC1
� Cabling savings
Hazardous Area Safe Area
DCS/PLCModbus
Modbus
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SEARCHLINE EXCEL Key Features and Benefits
� 100% solar immune-
No False Alarms, No “part time gas detection”, No Faults
� One Source, Two Detectors geometry
Simple yet highly effective optics, Field proven, Minimum failure mode
� High Intensity, heavy duty Xenon IR Source and Military Spec’ Detectors-
100% Availability in all bad weather environments, No long-term drift
� Dual Bandpass Reference Filter
No False Alarms in any Fog, Steam or Rain conditions
� Dynamic Heated optics-
Ensures no blockage of the beam from condensation or water spray
� Pre-warning of Dirty Optics or mis-alignment
Long Term operation, 100% Availability in all adverse site conditions
� Simple optical alignment (TX), Objective Signal Strength indication (RX)
Minimum training required, easy to re-check
� Digital RS485 communications
Allows simple alignment and health check using the Hand Held Interrogator, future FIELDBUS, PROFIBUS & MODBUS compatibility for AMS
� Robust stainless steel 316 housing
Can be used in hazardous area applications, anywhere in the world
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Prove it!
� We’ve always said it’s the best…..
NOW WE CAN PROVE IT!FM Hazardous and and performance approval on
all IR products
� The 1st and only Open Path gas detector with an
FM performance approval
� SIL 2 Verified by third Party
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FM Approval
All Hazardous Area and Performance testing completed to the FM standards.
Performance reports Issued combined with the Hazardous Area Assessments
FM listing on all IR products.