Quick Start Guide Sensepoint High Temperature (HT) LEL

Quick Start Guide Sensepoint High Temperature (HT) LEL
6. FAULT FINDING
The following table provides a list of possible faults related to the
sensor together with possible causes and remedies.
7. CERTIFICATION
The following certification information is imprinted on adjacent faces in
three separate blocks on the hexagonal part of the sensor body.
8. SPECIFICATIONS
Dimensions: ee diagram in Installation
S
section.
9. ACCESSORIES & SPARE PARTS
Description
Part Number
Complete replacement sensor:
• M20 version
• M25 version
• 3/4 NPT version
2106B2310
2106B2311
2106B2312
Operating temperature range: -55°C to +150°C.
Fault
Cause/Remedy
Operating humidity range: Sensor reads non zero
all the time
Gas could be present, ensure
there is no combustible gas in
the atmosphere.
0% to 90% RH continuous.
2
10% to 99% RH intermittent noncondensing.
Operating pressure range: 90 to 110 k Pa.
Stainless steel filter
00780-F-0018
Sensor reads non zero
when no gas is present
Adjust the control system zero
setting.
Warm up time: Less than 10 minutes.
Filter Housing
00780-C-0038
Voltage range: 2.9 V to 3.5 V bridge (at 200mA)
High Temperature Junction Box*
2052D0001
Sensor reads low when
gas is applied
Adjust the control system span
setting.
Power consumption: 700mW.
Signal output: mV bridge.
High Temperature Weather Protection
00780-A-0076
Sensor reads high when
gas is applied
Adjust the control system span
setting.
Calibration flow rate: ecommended between 1 and
R
1.5 l/min.
Sensor reads zero when
gas is applied
1. Check the wiring.
2. C
heck that the protective disc
has been removed from the
filter housing.
3. Check
that the filter is not
dirty/obstructed.
4. R
eplace the sensor if
poisoning is suspected.
Poisoning: he sensing elements may
T
become inactive after extensive
exposure to silicones,
halogenated hydrocarbons,
heavy metals or sulphur
compounds.
Expected operating life: 5 years.
IP rating: IP65 standard; IP66 with
Weather Protection.
CE: he sensor complies with
T
relevant CE directives.
* Note: the certified temperature range of the high temperature junction
box is limited to -50°C to +150°C
ATEX Certification:
 II 2 GD Ex d IIC Gb T3
Tamb -55º to +150ºC
 tb IIIC T200ºC Db IP66
Baseefa08ATEX0264X
IECEx BAS08.0069X.
11
Quick Start Guide
12
1. INTRODUCTION
The Sensepoint High Temperature (HT) Combustible Gas Sensor is
a sealed disposable sensor for the detection of flammable gases. It
must be fitted into a suitably approved Ex e or Ex d high temperature
junction box (e.g. FEEL Flameproof Enclosures) fitted with an approved
cable gland for external wiring (e.g. Peppers Cable Glands, Series
A3LF or CR3 CROLOCK Series).
The sensor features a Filter Housing that retains a stainless steel mesh
filter. It employs a catalytic pellistor sensor device which is used as
part of a bridge measuring circuit.
Sensepoint HT is certified for hazardous areas to EN60079 / EN61241
and is protected against water and dust ingress to IP66. The sensor
is available in M20, M25 and 3/4 NPT thread versions. The sensor
accepts accessories from a specified range (see Accessories & Spare
Parts).
Information notices
The types of information notices used throughout this handbook are as
follows:
WARNINGS
Indicates hazardous or unsafe practice that could result in
severe injury or death to personnel.
Caution: Indicates hazardous or unsafe practice which could result
in minor injury to personnel, or product or property damage.
Note Provides useful/helpful/additional information.
If more information outside the scope of this technical handbook is
required please contact Honeywell Analytics.
Sensepoint High Temperature (HT)
LEL Combustible Sensor
Associated Documents
Sensepoint Gas Sensors Technical Handbook Part No: 2106M0502
1
13
2. SAFETY
14
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WARNINGS
1. T
his unit is intended for use at a normal, or reduced, levels of
atmospheric oxygen and pressure only, i.e. less than 21% oxygen
and less than 1.1 bar. Oxygen deficient atmospheres (less than
10%V/V) may suppress the sensor output.
2. Refer to local or national regulations relative to installation at the
site. For Europe see EN60079-29-2, EN60079-14 and EN61241-14.
3. Operators should be fully aware of the action to be taken if the gas
concentration exceeds the alarm level.
4. 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.
CAUTIONS
1. Atmospheres above 100% LEL may suppress the sensor reading.
2. Do not modify or alter the sensor construction as essential safety
requirements may be invalidated.
3. Install using suitably approved and certified Ex e or Ex d high
temperature junction box, connectors and glands.
4. Dispose of in accordance with local disposal regulations. Materials
used - Stainless Steel.
5. This equipment is designed and constructed as to prevent ignition
sources arising, even in the event of frequent disturbances or
equipment operating faults.
Note: The control card must have a suitably rated fuse.
ATEX Special Conditions for Safe Use
The integral supply cables must be mechanically protected and
terminated in a suitable terminal or junction facility.
Equipotential bonding is to be provided by the mounting arrangements.
The sensor enclosure provides ingress protection IP66 only when the
sensor is provided with the weather guard and mounted with the sinter
pointing downwards.
2
Europe, Middle East, Africa, India
Life Safety Distribution AG
Javastrasse 2
8604 Hegnau
Switzerland
Tel: +41 (0)44 943 4300
Fax: +41 (0)44 943 4398
India Tel: +91 124 4752700
gasdetection@honeywell.com
Americas
Honeywell Analytics Inc.
405 Barclay Blvd.
Lincolnshire, IL 60069
USA
Tel: +1 847 955 8200
Toll free: +1 800 538 0363
Fax: +1 847 955 8210
detectgas@honeywell.com
Asia Pacific
Honeywell Analytics Asia Pacific
#508, Kolon Science Valley (I)
187-10 Guro-Dong, Guro-Gu
Seoul, 152-050
Korea
Tel: +82 (0)2 6909 0300
Fax: +82 (0)2 2025 0329
analytics.ap@honeywell.com
Technical Services
EMEAI: HAexpert@honeywell.com
US:
ha.us.service@honeywell.com
AP:
ha.ap.service@honeywell.com
www.honeywell.com
Please Note:
While every effort has been made to ensure accuracy in
this publication, no responsibility can be accepted for errors
or omissions. Data may change, as well as legislation,
and you are strongly advised to obtain copies of the most
recently issued regulations, standards, and guidelines. This
publication is not intended to form the basis of a contract.
Issue 6 05/2013
H_MAN0622_2106M0523_EMEAI
A04014
© 2013 Honeywell Analytics
3. INSTALLATION
3. INSTALLATION
The Sensepoint HT Combustible Gas Sensor must be fitted into a
suitably approved Ex e or Ex d high temperature junction box fitted
with an approved cable gland for external wiring. The sensor requires a
200mA current supply, nominal 3V, derived from a suitable control card.
Only a qualified installation engineer should install the sensor.
Install the sensor in a location free from direct heat sources. For optimum
protection against water ingress ensure that the sensor is installed facing
downwards. See the Sensepoint Gas Sensors Technical Handbook for
installation in a duct or in forced air conditions.
Sensor wiring
3. INSTALLATION
4. CALIBRATION
Sensors should be calibrated at concentrations representative of those to
be measured. It is always recommended that Sensepoint HT is calibrated
with the target gas it is to detect. If this is not possible, then cross
calibration can be used.
Control sy stem field
wiring
Green
Brown
Blue
White
Earth
Sensitive (S)
Non-Sensitive (NS)
Common
For calibration in fast flow conditions using a Weather Protection, see the
Sensepoint Gas Sensors Technical Handbook.
125mm
High Temperature
Junction Box
1. Isolate all associated power supplies and ensure that they remain
OFF during the installation procedure. Ensure a gas free atmosphere.
1. Zero the control system with no gas present on the sensor.
If combustible gas is suspected to be in the vicinity of Sensepoint HT flow
clean air over the sensor using a flow housing (see below).
2. Install the high temperature junction box.
See the manufacturer’s instructions.
Ex e/Ex d gland
3. Remove the junction box lid.
4. Fit the Sensepoint HT sensor to the junction box.
Ensure that the junction box thread and the sensor thread are
compatible. Push the sensor wires through the cable entry in the
junction box and screw the sensor body firmly home into the entry.
Lock the sensor in place with a suitable lock-nut.
5. Connect the sensor wiring to the junction box terminal strip.
See the subsequent wiring diagram. Use multicore cable, three wire
minimum, of conductor size 2.5mm2 max.
6. F
it a suitable gland to the box, secure the control system cable
and connect the field wiring to the terminal strip.
See the subsequent wiring diagram.
Threads available:
M20, M25, 3/4 NPT
Certification data (on
adjacent faces)
38mm across flats
9. If the sensor is installed:
• indoors - discard the filter.
58mm
• o
utdoors - fit the previously removed filter (if required) to the High
Temperature Weather Protection accessory (Part No: 00780-A-0076)
and fit the accessory to the sensor.
Sensepoint High
Temperature Combustible
Gas Sensor 0-100%LEL
Fit the seal supplied with the Weather Protection accessory to the
sensor body. Screw the accessory firmly onto the sensor until it seats
against the sensor body hexagon.
Filter
8. U
nscrew the filter housing from the sensor body and remove the
filter from the filter housing.
Filter Housing
Sensor body
Discard the filter housing with protective disc. The filter housing
material cannot withstand high temperatures.
Weather Protection
Seal
42mm
3
4
5
4. CALIBRATION
4. CALIBRATION
4. CALIBRATION & MAINTENANCE
1. O
btain the star rating for the calibration gas and the gas to be
detected from table 1.
2. Using table 2, look up the correction factor.
3. M
ultiply the Calibration Gas concentration (in %LEL) by the
correction factor to get the effective concentration.
4. U
se the effective concentration when setting up the control card
during the calibration procedure.
Important Notes:
1. S
ince combustible sensors require oxygen for correct operation, a
mixture of gas in air should be used for calibration purposes.
2. A
ssuming an average sensor performance, the sensitivity information in
Tables 1 and 2 is normally accurate to ± 20%.
Table 1 – Star Rating of gases
Gas
Acetone
Ammonia
Benzene
Butane
Butanone
Butyl Acetate
Butyl Acrylate
Cyclohexane
DiEthyl Ether
Ethane
Ethanol
Ethyl Acetate
Ethylene
Heptane
CAS Number
67-64-1
7664-41-7
71-43-2
106-97-8
78-93-3
123-86-4
141-32-2
110-82-7
60-29-7
74-84-0
64-17-5
141-78-6
74-85-1
142-82-5
LEL (%v/v)
2.5
15.0
1.2
1.4
1.8
1.3
1.2
1.2
1.7
2.5
3.1
2.2
2.3
1.1
7
Star Rating
5
7
3
4
4
2
2
4
4
5
5
4
5
3
110-54-3
1333-74-0
74-82-8
67-56-1
108-10-1
111-65-9
109-66-0
67-63-0
74-98-6
115-07-1
100-42-5
109-99-9
108-88-3
121-44-8
1330-20-7
1.0
4.0
4.4
5.5
1.2
0.8
1.4
2.0
1.7
2.0
1.1
1.5
1.1
1.2
1.0
8*
7*
6*
5*
4*
3*
2*
1*
8*
1.00
0.81
0.66
0.53
0.42
0.34
0.26
0.21
7*
1.24
1.00
0.81
0.66
0.52
0.42
0.33
0.26
Unit used to detect
6*
5*
4*
3*
1.52 1.89 2.37 2.98
1.23 1.53 1.92 2.40
1.00 1.24 1.56 1.96
0.80 1.00 1.25 1.58
0.64 0.80 1.00 1.26
0.51 0.64 0.80 1.00
0.40 0.50 0.63 0.79
0.32 0.39 0.49 0.62
5. When gassing with air, adjust the control card to indicate zero.
6. 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.
Cross Calibration Procedure
Caution: W
here the user calibrates any sensor using a different
gas, responsibility for identifying and recording
calibration rests with the user. Refer to the local
regulations where appropriate.
When calibrating the Sensepoint HT sensor with a gas which is different
to the gas/vapour to be detected, the following cross calibration
procedure should be followed.
6
Example
3
6
6
5
3
2
3
3
4
5
2
3
3
4
2
1. T
arget gas to be detected is Butane. The calibration gas available is
46%LEL Methane.
2. The star rating of Methane is 6 and Butane is 4.
3. From Table 2, the correction factor is 1.56.
4. T
he control card should therefore be told the concentration is (46.0 x 1.56)
= 72%LEL in order to give an accurate reading for Butane using Methane
as a calibration gas.
5. MAINTENANCE
Only a qualified installation engineer should service the sensor. Ensure power
is off before carrying out any maintenance procedures.
The only maintenance required is sensor replacement and filter changing
(if fitted to an accessory). To replace the complete sensor refer to the
Sensepoint Gas Sensors Technical Handbook. To replace the filter carry out
the following procedure:
1. Remove the High Temperature Weather Protection accessory.
Table 2 Meter Multiplication Factors
Unit calibrated
to detect
4. Allow the sensor to stabilise.
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)
10. Power-up the system and check for correct operation.
Hexane
Hydrogen
Methane
Methanol
MIBK
Octane
Pentane
Propan-2-ol
Propane
Propylene
Styrene
TetraHydroFuran
Toluene
TriEthylAmine
Xylene
2. F
it 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.
3. P
ass the gas through the flow housing at a flow rate of
approximately 1 litre to 1.5 litre/min.
Note: Earth equipotential bonding must be achieved either by the
sensor’s integral earth conductor or via the sensor rear mounting
thread.
7. Refit the junction box lid.
To calibrate the Sensepoint HT sensor carry out the following procedure:
Prior to calibration, allow the sensor to warm up for approximately 10
minutes. Re-calibration should only be attempted by qualified service
personnel.
2. Remove the old filter and replace with a fresh filter.
3. Replace the Weather Protection accessory.
2*
3.78
3.05
2.49
2.00
1.60
1.27
1.00
0.78
1*
4.83
3.90
3.17
2.55
2.03
1.62
1.28
1.00
Ensure the Weather Protection seal is in place. Screw the accessory firmly
onto the sensor until it seats against the sensor body hexagon.
Weather
Protection
Sensor body Seal
Filter
Weather
Protection
Note: These settings must only be used with a calibration gas
concentration of 50% LEL. All data at standard temperature and
pressure.
8
9
10
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