Microsoft Power Point - Infra Red Open Path Gas Detectors Haven

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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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Maui A Platform

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BP Yanchen 13-1

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BP Yanchen 13-1

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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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� Option 2


DX100(M) /Controller

� Non Intrusive

Interrogation

� Redundant signals to

controller

� Remote status via

Modbus at SCADA

� Local Interrogation via

SHC1


SCADAModbus

4-20mA

4-20mA

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� Option 3


DX100(M) /DCS or PLC

� Remote Status to

DCS/PLC via multi drop

Modbus

� Local non intrusive

Interrogation via SHC1

� Cabling savings


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.

Documents

Microsoft Power Point - Infra Red Open Path Gas Detectors Haven