Honeywell Sieger Sensepoint User manual

Sieger Sensepoint
LEL Combustible Sensor
Operating Instructions
Issue 01 12/2005
H_MAN0590_V1
2106M0518
© 2005 Honeywell Analytics
11068
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Data may change, as well as legislation, and you
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This publication is not intended to form the
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© 2005 Honeywell Analytics
SENSEPOINT
MAN0513.P65 Issue 06 - 04/99
2106M0501
SensePoint LEL
Combustible Sensor
1. INTRODUCTION
SensePoint is a sealed disposable sensor for the detection
of flammable gases and is designed for use with an
approved junction box.
It employs a catalytic pellistor sensor device which is used
as part of a bridge measuring circuit.
Sensepoint is certified for hazardous areas to EN50018
and is protected against water and dust ingress to IP66/67.
The sensor is available in M20, M25, M26 or 3/4 NPT
thread versions. All accept accessories from the specified
range.
2. ASSOCIATED DOCUMENTATION
2106M0502 SensePoint Technical Handbook.
Refer to the relevant control system manual for connection
information.
1. INTRODUCTION & 2. ASSOCIATED DOCUMENTATION
CONTENTS
1. INTRODUCTION ...................................................... 2
2. ASSOCIATED DOCUMENTATION ......................... 2
3. SAFETY .................................................................... 3
3.1 Wa rning s ........................................................... 3
3.2 Cau tions ............................................................. 3
4. OPERATIONS .......................................................... 4
4.1 Installation ......................................................... 4
4.2 Calibration ......................................................... 5
4.3 Fault finding ....................................................... 9
5. MAINTENANCE ..................................................... 10
5.1 Changing filters .................................................9
Appendix A - Specifications ....................... 11
Appendix B - Glossary ............................... 12
Appendix C - Main features ....................... 13
Appendix D - Spare parts ........................... 14
1 2
11 12 13 14
APPENDIX C - MAIN FEATURESAPPENDIX A - SPECIFICATIONS APPENDIX D - SPARE PARTSAPPENDIX B - GLOSSARY
Operating temperature range:
-55°C to +80°C (see certification).
Operating humidity range:
20% to 90% RH continuous.
10% to 99% RH intermittent - non condensing.
Operating pressure range:
90 to 110 k Pa.
Warm up time:
no greater than 10 minutes.
Voltage range:
2.9 V to 3.5 V bridge (at 200mA).
Power consumption:
700mW.
Signal output:
mV bridge.
Calibration flow rate:
recommended between 1 and 1.5 l/min.
Poisoning:
the sensing elements may become inactive after
extensive exposure to silicones, halogenated
hydrocarbons, heavy metals or sulphur compounds.
Expected operating life:
5 years.
IP rating:
IP65 standard; IP66/67 with weather protection.
Certification:
Ex II 2G EExd IIC T6 -55 to +55°C.
Ex II 2G EExd IIC T5 -55 to +70°C.
Ex II 2G EExd IIC T4 -55 to +80°C.
BAS98ATEX2156X.
UL approved via IEC 79 (pending).
This product complies with the relevant CE standards
concerning performance: EMC to BS EN50081 parts 1 & 2,
BS EN50082 parts 1 & 2 and EN 50054.
Explosive gas atmosphere:
a mixture in air of combustible materials in the form of gas
vapour or mist in which, after ignition, combustion spreads
throughout the unconsumed mixture.
Lower explosive limit (LEL):
the volume of combustible gas or vapour in air below which
an explosive gas atmosphere will not be formed.
Exd:
flame proof or explosion proof within the confines of European
standards EN50014 and EN50018. An enclosure that can
withstand the pressure developed during the internal
explosion of an explosive mixture and which prevents
transmission of the explosion to the explosive atmosphere
surrounding the enclosure.
Exe:
increased safety within the confines of European standards
EN50014 and EN50019 applied to electrical apparatus that
does not produce arcs or sparks in normal service, in which
additional measures are applied so as to give increased
security against the possibility of excessive temperatures.
PPS:
polymer polyphenylene sulphide, suitable for use in most
chemical environments (eg acids, aldehydes, ketones,
alkalies, petroleum, aromatic hydrocarbons, alcohols, ethers,
esters and most chlorinated hydrocarbons). Avoid immersion
in solvents for extended periods. For further details contact
Zellweger Analytics Ltd.
Sensor ....................................................... 2106B1200 (M20)
Sensor ....................................................... 2106B1201 (M25)
Sensor ....................................................... 2106B1202 (M26)
Sensor ....................................................... 2106B1204(3/4 NPT)
Weather protection ................................... 02000-A-1640
Sensor filter ............................................... 00780-F-0018
Flow housing ............................................. 02000-A-1645
Collecting cone ......................................... 02000-A-1642
Junction box (std) ..................................... 00780-A-0100
High temperature junction box ................. 555-090-038
High temperature weather protection ...... 00780-A-0076
To reorder a complete new sensor, see the label on the
product leads, or contact Zellweger Analytics Ltd.
103mm
Standard Zellweger
Analytics junction box
threads available:
M20; M25; M26; 3/4” NPT.
SensePoint Combustible Gas
Sensor 0-100% LEL
Weight - 190g
Filter
Plastic retainer
103mm
74mm
56mm
52mm
(across flats)
Exe/Exd gland
operating instructions
Poole Dorset
SensePoint
static risk - read manual
EEx d IIC T6 Tamb -55 +55oC
EEx d IIC T5 Tamb -55 +70oC
EEx d IIC T4 Tamb -55 +80oC
0600
Bas98ATEX2156X II 2G
manufacturer’s
trademark &
address
CE mark -
conforms to all
applicable
European
directives
product name
test house
trademark
certification code
as EN50014 1992
certification number
certified ambient
temperature
range
explosion
protection mark
and equipment
group & category
ident.number
of ATEX
notified
body
caution
Certification label as defined in directive 94/9/EC
This publication is not intended to form the basis of a contract, and the company reserved the right to
amend the design and specification of the instruments without notice.
MIDDLE EAST
Zellweger Analytics
Middle East Regional Office
PO Box 52196
Karama-Bur Dubai UAE
Tel: [phone]
Fax: [phone]
NETHERLANDS
Imbema Analytics BV
Maurisstraat 1-7
Postbus 160
2000 AD Haarlem
Netherlands
Tel: [phone]
Fax: [phone]
FRANCE
Zellweger Analytics SA
33 rue de Ballon
ZI des Richardets
F-93165 Noisy le Grand
Cedex
France
Tel: [phone]
Fax: [phone]
GERMANY
Zellweger Analytics GmbH
Sollner Strasse 65b
D-81479 Munchen
Germany
Tel: [phone]
Fax: [phone]
ITALY
Zellweger Analytics srl
Via F. Primaticcio 168
1-20147 Milano
Italy
Tel: [phone]
Fax: [phone]
UNITED KINGDOM
Zellweger Analytics Ltd
Parsonage Road
Takeley
Bishop’s Stortford
Herts
CM22 6PU, U.K.
Tel: [phone]
Fax: [phone]
SINGAPORE
Zellweger Analytics Ltd
Asia Pacific Regional Office
30, Tech Park Crescent
Singapore 638102
Tel: [phone]
Fax: [phone]
SPAIN
Zellweger Analytics SA
Avda Remolar 31
08820 EI Prat de LIobregrat
Barcelona
Spain
Tel: [phone]
Fax: [phone]
USA
Zellweger Analytics Inc
(Sieger Division)
405 Barclay Blvd
Lincolnshire
Illinois 60069,USA
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
INTERNATIONAL HQ
Zellweger Analytics Ltd
Hatch Pond House
4 Stinsford Road
Nuffield Estate
Poole
Dorset
BH17 0RZ, UK
Tel: [phone]
Fax: [phone]
E-mail: postmaster@
zellweger-analytics.co.uk
Ser.No./Year of manufacture

3
5.1 CHANGING FILTERS
- Remove the grey plastic retainer or accessory.
- Remove the old filter and replace with a fresh filter.
- Replace the grey plastic retainer or accessory.
5. MAINTENANCE
4 5
4. OPERATIONS
Table 2: Meter Settings
* Rating of Gas to be Detected
* Calibration
Gas 8* 7* 6* 5* 4* 3* 2* 1*
8* 50 62 76 95 - - - -
7* 40 50 61 76 96 - - -
6* 33 41 50 62 78 98 - -
5* 26 33 40 50 63 79 100 -
4* 21 26 32 40 50 63 80 -
3* - 21 26 32 40 50 64 81
2* - - - 25 31 39 50 64
1* - - - - 25 31 39 50
Note: These settings must only be used with a calibration
gas concentration of 50% LEL.
Cross Calibration example:
The target gas to be detected is Butane. The calibration
gas available is Methane (50% LEL).
Look up the star rating for each gas (Table 1):
Butane 4*, Methane 6*
Check the meter settings for 50% LEL calibration gas
(Table 2).
The control card meter should therefore be set to 78%
to give an accurate reading for Butane, using 50% LEL
Methane as a calibration gas.
4.3 FAULT FINDING
Sensor reads non zero all the time:
-gas could be present, ensure there is no combustible
gas in the atmosphere.
Sensor reads non zero when no gas is present:
-adjust the zero of the control system.
Sensor reads low when gas is applied:
-adjust the span of the control system.
Sensor reads high when gas is applied:
-adjust the span of the control system.
Sensor reads zero when gas is applied:
-check the wiring.
-check that the dust protection cap has been removed.
-check that the sinter is not obstructed.
-replace the sensor if poisoning is suspected.
Table 3: Meter Multiplication Factors
Unit calibrated Unit used to detect
To Detect 8* 7* 6* 5* 4* 3* 2* 1*
8* 1.00 1.24 1.52 1.89 2.37 2.98 3.78 4.83
7* 0.81 1.00 1.23 1.53 1.92 2.40 3.05 3.90
6* 0.66 0.81 1.00 1.24 1.56 1.96 2.49 3.17
5* 0.53 0.66 0.80 1.00 1.25 1.58 2.00 2.55
4* 0.42 0.52 0.64 0.80 1.00 1.26 1.60 2.03
3* 0.34 0.42 0.51 0.64 0.80 1.00 1.27 1.62
2* 0.26 0.33 0.40 0.50 0.63 0.79 1.00 1.28
1* 0.21 0.26 0.32 0.39 0.49 0.62 0.78 1.00
4. OPERATIONS
4. OPERATIONS
Grey plastic retainer
Filter
Main body of sensor
4.1 INSTALLATION
The SensePoint must be fitted into a suitably approved Exe
or Exd junction box fitted with a suitably approved cable
gland. This should be correctly installed before use. Cabling
should be multicore, three wire minimum, of conductor size
2.5 mm2 max.
The sensor should be fitted into a threaded hole within the
junction box and locked in place with a lock nut. Ensure that
junction box thread is compatible with sensor thread.
The sensor should be installed in a location free from direct
heat sources. It should be fitted such that it either points
downwards or horizontally. It is not recommended that the
sensor points upwards. See the technical handbook for
installation in forced air conditions.
Wiring connections are:-
4. OPERATIONS 4. OPERATIONS
3.1 WARNINGS
This apparatus is not suitable for use in
oxygen enriched atmospheres (>21%V/V).
Oxygen deficient atmospheres (<10%V/V)
may suppress sensor output.
Refer to local or national regulations
relative to installation at the site.
Operator should be fully aware of the action
to be taken if the gas concentration exceeds
an alarm level.
SensePoint should be protected from
mechanical impact. Installation should
consider not only the best placing for gas
leakage related to potential leak points,
gas characteristics and ventilation, but also
where the potential of mechanical damage
is minimized or avoided.
3.2 CAUTIONS
Atmospheres above 100% LEL may
suppress the sensor reading.
Do not modify or alter the sensor
construction as essential safety
requirements may be invalidated.
Install using certified Exe or Exd junction
box, connectors and glanding.
Dispose of in accordance with local disposal
regulations. Materials used -Fortron®
(PPS- Polyphenylene Sulphide).
3. SAFETY
4.2 CALIBRATION
Prior to calibration, allow the sensor to warm up for
approximately 10 minutes. Re-calibration should only be
attempted by qualified service personnel.
First zero the control system with no gas present on the
sensor. If combustible gas is suspected to be in the vicinity of
SensePoint, flow clean air over the sensor using a flow housing
(see below).
Fit a flow housing and connect a cylinder of either air, for a
zero, or a known concentration of gas in air, at approximately
the alarm point (e.g. 50% LEL), to the flow housing. Pass the
gas through the flow housing at a flow rate of approximately
1 l to 1.5 l per minute. Allow the sensor to stabilise. When
gassing with air, adjust the control card to indicate zero. For
span, the control card should be adjusted to indicate the
concentration of the target gas being applied. Remove the
flow housing and the gas supply.
Sensors should be calibrated at concentrations representative
of those to be measured. It is always recommended that
SensePoint is calibrated with the target gas it is to detect. If
this is not possible, then cross calibration can be used.
For calibration in fast flow conditions see the technical
handbook.
4.3 CROSS CALIBRATION PROCEDURE
When the SensePoint sensor is to be calibrated with a gas
which is different to the gas/vapour to be detected, the
following cross calibration procedure should be followed.
Table 1 lists gases according to the reaction they produce at
the detector. An eight star (8*) gas produces the highest
output while a one star (1*) gas produces the lowest output.
(These are not applicable at ppm levels.)
4. OPERATIONS
To calibrate the SensePoint sensor, obtain the star rating for
both the test gas and the gas to be detected from table 1.
These values may then be used in table 2 to obtain the
required meter setting when a 50% LEL test gas is applied to
the detector.
If a sensor is to be used to detect a gas other than that for
which it was calibrated, the required correction factor may be
obtained from table 3. The meter reading should be multiplied
by this number in order to obtain the true gas concentration.
IMPORTANT
Since combustible sensors require oxygen for correct
operation, a mixture of gas in air should be used for
calibration purposes.
Assuming an average sensor performance, the sensitivity
information in tables 1 to 3 is normally accurate to ± 20%.
Table 1: Star Rating of Gasses
7 8 9 10
6
Gas Star Rating
Acetone 4*
Ammonia 7*
Benzene 3*
Butane 4*
Diethyl ether 4*
Ethane 6*
Ethanol 5*
Ethyl acetate 3*
Ethylene 5*
Gas Star Rating
Hexane 3*
Hydrogen 6*
Methane 6*
Octane 3*
Propan-2-ol 4*
Propane 5*
Styrene 2*
Tetra hydrafuran 4*
Xylene 2*
The unit requires 200mA current with a nominal 3V supply.
Installation and service are to be performed by a qualified
installation engineer with the power to the sensor
disconnected.
SENSITIVE
(S)
NON
SENSITIVE
(NS) COMMON
(01)
SPARE
BROWN BLUE WHITE
SENSOR

Thank you for reading this data sheet.
For pricing or for further information, please contact us at our UK Office, using the details
below.
UK Office
Keison Products,
P.O. Box 2124, Chelmsford, Essex, CM1 3UP, Engl nd.
Tel: [phone]
F x: [phone]
Em il: s [email protected].uk
Please note - Product designs and specifications are sub ect to change without notice. The user is responsible for determining the
suitability of this product.