Reference Manual
Part Number: MAN-0084, re v . 08
Release: June 2016
SC310 Catalytic Bead Combustible Sensor
Important Instructions
Installing, operating or maintaining a Net Safety Product improperly could lead to serious injury or
death from explosion or exposure to dangerous substances. Comply with all information on the
product, in this manual, and in any local and national codes that apply to the product. Do not allow
untrained personnel to work with this product. Use Net Safety parts and work procedures specified in
this manual.
Net Safety Monitoring, Inc (Net Safety) de si gns, manufactures and tests p roducts to function within
specific conditio ns. Be c ause these products ar e sophisticated technical instrumen ts, i t is important
that the owner and oper ation personnel must str i c tly adhere both to the information printed on the
product nameplate and to all instructions provided in this manual prior to installation, operation, and
maintenance.
Notice
The contents of this publication are presented for informational purposes only, and while every effort
has been made to ensure t heir accuracy, they are not to be construed as warranties or guarantees,
expressed or implied, regarding the products or services described herein or their use or applicability.
All sales are governed by Net Safety’s terms and conditions, which are available upon request. We
reserve the right to modify or improve the designs or sp e c i fications of such produc t s at any time.
Net Safety does not assume responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use and maintenance of any Net Safety products remains solely with
the purchaser and end us e r .
To the best of Net Safety’s knowledge the information herein is complete and accurate. Net Safety
makes no warranties, expressed or implied, including implied warranties of merchantability and fitness
for a particular purpo se wi th respect to this manu al and, in no event, shall N e t Safety be liable fo r an y
incidental, punitive, special or consequential damages including, but not limited to, loss of production,
loss of profits, loss of revenue or use and costs incurred including without limitation for capital, fuel and
power, and claims o f third parties.
Product names used herein are for manufacturer or supplier identification only and may be
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Net Safety and the Net Safety logo are regi stered trademarks of Net Safety Monitoring, Inc. The
Emerson logo is a trademark and service mar k o f the Emerson Electric Company.
Copyright © 2016 by R o se mount, Shakopee, M N .
All rights reserved. No part of this work may be reproduced or copied in any form or by any means - graphic,
electronic, or mechanical without first re c e iving written pe rmission of Rosemount, Sha k opee, MN.
Warranty
Limited Warranty
Resale Products
Limitation of Remedy and Liability
1.
and Liability) herein, Seller warrants that (a) the licensed firmware embodied in the Goods will
execute the programming instructions provided by Seller; (b) that the Goods manufactured by
Seller will be free from defects in materials or workmanship under normal use and care; and (c)
Services will be performed by trained personnel using proper equipment and instrumentation
for the particular Service provided. The foregoing warranties will apply until the expiration of
the applicable warranty period. Sensors and d et ectors are warrante d ag ainst defectiv e p ar ts
and workmanship as pe r Section
to Buyer (
Buyer agrees that Seller has no liabili ty for Resale Products beyond making a reasonabl e
commercial effort to arrange for procurement and shipping of the Resale Products. If Buyer
discovers any warranty defects and notifies Seller thereof in writing during the applicable
warranty period, Seller shall, at its option, (i) correct any errors that are found by Seller in the
firmware or Services; (ii) repair or replace FOB point of manufacture that portion of the Goods
found by Seller to be defective; or (iii) refund the purchase price of the defective portio n of the
Goods/Services. Al l replacements or repair s ne cessitated by i nad eq uate maintenance; nor mal
wear and usage; unsuitable power sources or environmental conditions; accident; misuse;
improper installation; modification; repair; use of unauthorized replacement parts; storage or
handling; or any other cause not the fault of Seller, are not covered by this limited warranty and
shall be replaced or repaired at Buyer’s sole expense and Seller shall not be obligated to pay
any costs or charges in cu r r ed by Buyer or any other p ar ty except as may be agree d upon in
writing in advance by Seller. All costs of dismantling, reinstallation, freight and the time and
expenses of Seller’s personnel and representatives for site travel and diagnosis under this
limited warranty clause shall be borne by Buyer unless accepted in writing by Seller. Goods
repaired and parts replaced by Seller during the war r anty period shall b e i n war r anty for the
remainder of the original warranty period or 90 days, whichever is lo ng er . This limited
warranty is the only warranty made by Sell er and c an b e amended only in a writing signed by an
authorized representative of Seller. T he li mited warranty herein cea ses to be effectiv e if Buyer
fails to operate and use the Goods sold hereunde r i n a safe and reasonable manner and in
accordance with any wr i t ten instructions from t he m anufacturers. THE WARRANTIES AND
REMEDIES SET FORTH ABOVE ARE EXCLUSIVE. THERE ARE N O R EP R ESENTATIONS OR
WARRANTIES OF ANY KIND, EXP R ESS OR IMPLIED, AS TO MERCHAN T ABILITY, FITNESS FOR
PARTICULAR PURPOSE OR ANY OTHER MATTER WITH RESPEC T TO ANY OF THE GOODS OR
SERVICES.
. Subject to the limitations contained in Section 10 (Limitation of Remedy
7.4. Products purchased by Seller fro m a third party for resale
) shall carry only the warra n ty e xte nd ed by the original manufacturer.
2.
DELAY IN PERFORMANCE. T HE REM EDIES OF BUYER SET FORTH IN T HE AGREEMENT ARE
EXCLUSIVE. IN NO EVENT, REGARDLESS OF THE FORM OF T HE C LAI M OR C AUSE OF ACTION
(WHETHER BASED IN CONT R AC T , IN FR IN GEMENT, N EGL IGENC E, STRIC T L IABILITY, OTHER
TORT OR OTHERWISE), SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS
EXCEED THE PRICE TO BUYER OF THE SPECIFIC GOODS M AN UF AC TURED OR SERVICES
PROVIDED BY SELLER GIVING RISE TO THE CLAIM OR CAUSE OF ACTION. BUYER AGREES THAT
IN NO EVENT SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS EXTEND TO
INCLUDE INCIDENTAL, CONSEQUENTIAL OR PUNITI VE DAMAGES. THE TERM
“CONSEQUENTIAL DAMAGES” SHALL INCLUDE, BUT NOT BE LIMITED TO, LOSS OF
ANTICIPATED PROFITS, REVEN UE OR U SE AND COSTS INCURRED INC L UDI NG WITHOUT
LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF BUYER’S CUSTOMERS.
. SELLER SHALL NOT BE LIABLE FOR DAMAGES CAUSED BY
Reference Manual Table of Contents
Table of Contents i
MAN-0084 June 2016
Contents
Section 1: Introduction ...................................................................... 1
1.1 Models covered ................................................................................................................... 1
1.2 Service support ................................................................................................................... 1
1.3 Return of material ............................................................................................................... 1
1.4 Product recycling/disposal .................................................................................................. 1
Section 2: Installation ........................................................................ 2
2.1 Unpacking and inspection ................................................................................................... 2
2.2 Locate sensor ...................................................................................................................... 2
2.3 Direct mount or sensor separation ...................................................................................... 2
2.3.1 Sensor direct mount ............................................................................................. 2
2.3.2 Sensor separation ................................................................................................. 2
2.4 Dimensions ......................................................................................................................... 4
2.5 Mounting ............................................................................................................................ 5
2.6 Wiring ................................................................................................................................. 6
2.6.1 Field installation .................................................................................................... 6
2.6.2 Sen so r se paration distanc e ................................................................................... 7
2.6.3 Installation to transmitter or junction box ............................................................. 7
2.6.4 Sensor wiring ........................................................................................................ 7
2.6.5 Exter nal ground .................................................................................................... 8
2.7 Calibration .......................................................................................................................... 9
2.7.1 K-factor ................................................................................................................ 9
2.8 Installation checklist .......................................................................................................... 11
Section 3: Operation ........................................................................ 12
3.1 Sensor configuration settings ............................................................................................ 12
3.2 Sensor power up ............................................................................................................... 12
3.3 Sensor communication ..................................................................................................... 12
3.4 Millennium II Basic transmitter configuration .................................................................... 12
3.5 Fault conditions ................................................................................................................ 13
3.6 SensorGuard ..................................................................................................................... 13
Section 4: Maintenance ................................................................... 14
4.1 Sensor poisoning ............................................................................................................... 14
4.2 Cross sensitivities .............................................................................................................. 14
4.3 Routine inspections ........................................................................................................... 14
4.4 Bump testing .................................................................................................................... 14
4.5 Sensor replacement procedure ......................................................................................... 15
4.6 Troubleshooting ............................................................................................................... 15
4.7 Storage ............................................................................................................................. 15
4.8 Spare parts and accessories ............................................................................................... 16
Section 5: Electrostatic sensitive device ........................................... 17
Section 6: Wire resistance table ....................................................... 18
Section 7: Specifications .................................................................. 19
7.1 Electrical ........................................................................................................................... 19
7.1.1 Voltage range ..................................................................................................... 19
7.1.2 Power consumption ............................................................................................ 19
7.2 Performance ..................................................................................................................... 19
Table of Contents Reference Manual
ii Table of Contents
June 2016 MAN-0084
7.2.1 Response time* .................................................................................................. 19
7.2.2 Accuracy ............................................................................................................. 19
7.2.3 Zero Drift ............................................................................................................ 19
7.2.4 Repeatability ...................................................................................................... 19
7.2.5 Dete cti on Range ................................................................................................. 19
7.2.6 C alibration Frequency ......................................................................................... 19
7.2.7 Sto r ag e te mperature .......................................................................................... 19
7.2.8 Operating tempera ture ...................................................................................... 19
7.2.9 Relative humidity ................................................................................................ 20
7.2.10 Metallurgy (housi ng ) .......................................................................................... 20
7.2.11 Ingress protection ............................................................................................... 20
7.2.12 Weight ............................................................................................................... 20
7.3 Separation ........................................................................................................................ 20
7.4 Warranty ........................................................................................................................... 20
Section 8: Certifications ................................................................... 21
8.1 North America................................................................................................................... 21
8.1.1 Hazardous locations ........................................................................................... 21
8.1.2 Performance ....................................................................................................... 21
8.2 IECEx ................................................................................................................................. 21
8.3 FC Models ......................................................................................................................... 22
8.3.1 N o r t h Ame r i c a ( -FC models) ................................................................................ 22
8.3.2 IECEx (-FC models) .............................................................................................. 22
8.3.3 Special conditions for safe use ............................................................................ 22
Section 9: Ordering information ...................................................... 23
Reference Manual Introduction
Introduction 1
Rosemount
6021 Innovation Boulevard
Shakopee, MN 55379
RMA number
MAN-0084 June 2016
Section 1: Introduction
1.1 Models covered
The SC310 catalytic bead combustible gas sensor is designed specifically for use with the Millennium II
Transmitter (mode l s M 21, M22, or M2B). This sensor is bo th versatile and reliable for fast, accur ate,
and continuous monitoring of gases in extreme enviro nments.
The sensor assembl y c o n si sts of an explosion proof enclosure (housing) rated for hazardous locations
and a replaceable sensor module. This senso r must only be used with a Millennium II series transmitter.
If the sensor is connected to any other model of transmitter, it will not function and may result in the
sensor or transmitter being damaged.
1.2 Service support
Technical support for this product can be provided by contacting your local Emerson Process
Management represe ntative or by co ntac ting the Technical Suppo r t de p ar tment at +1 866 347 3427
(toll free) or Safety.CSC@Emerson.com
.
1.3 Return of material
To expedite the return of this product, proper communication between the customer and the factory is
important. Before returning a product, c al l +1 866 347 3427 (toll free ) or e-mail
Safety.CSC@Emerson.com
On the return of the equipment, include the following information:
1. RMA number provided to you by Rosemount
2. Company name and contact information
3. Ship all equipment, prepaid to:
4. Mark all packages wit h the
Pack items to protect them from damage and use anti-static bags or aluminum-backed cardboard as
protection from electrostatic damage.
All equipment must be shipped prepaid. Collect shipments will not be accepted.
for a Return Material Authorization (RMA) number.
and type of return (e.g. return for evaluation)
1.4 Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of in
accordance with local and national legislations/regulations.
Installation Reference Manual
2 Installation
Avoid placing the sensor where it may be exposed to splas hing or di rect water sprays. To protect the
sensor a splashguard may be req ui r e d .
June 2016 MAN-0084
Section 2: Installation
2.1 Unpacking and inspection
Carefully remove all of the components from the packaging and verify the m against the enclosed
packing list. Inspect all components for any obvious damage such as broken or loose parts. If you find
any components missing or damaged, notify your local Emerson Process Management representative
or the factory immediately.
Recycling of packaging should be taken into consideration and disposed of in accordance with local and
national legislations/regulations.
2.2 Locate sensor
Prior to installing the sensor, a plan should be developed for placement of the sensor. Although there
are no absolute rules for determining the quantity of detectors or location of a sensor, the following
points should be considered when planning the installation.
• Carefully locate the sensor in an area where gases may p otentially accumulate, considering that
light gases tend to ri se and heavy gases tend to fal l and accumulate in low are as.
• Use redundant systems to enhance protection and reliability.
• Consider air mov em e nt p atterns in the facility.
• Consider the constr uc tion of the facility su ch as trenches where h eavy gases or peaks where l ight
gases may accumulate.
• Seek advice from experts knowledgeable about the target gas to be detected.
• Refer to the regulatory publications that discuss guidelines for your industry.
2.3 Direct mount or sensor separation
2.3.1 Sensor direct mount
The sensor can be directly attached to a Millennium II transmitter and placed in an appropriate location
for detecting the target gas, or the sensor can be separated and remotely mounted away from the
Millennium II transmitter. The sensor shoul d b e ac c e ssible for calibration and maintenance purposes.
The transmitter sho uld be located where it is accessible and visible.
2.3.2 Sensor separation
If the sensor is to be remotely mounted from the transmitter, the sensor must be connected to a
certified junction box. In this case, the transm i t ter is typically located near eye-level for easy access and
the sensor is mounted whe re the gas is likely to ac cu mulate.
Reference Manual Installation
Installation 3
Figure 2-1 Sen so r se paration exampl e
Millennium II Transmitter
Separation Junction Box
Millennium II SC310 Sen so r
CCS-1 Calibration Cup
Conduit
Calibration Tubing
MAN-0084 June 2016
In order to ease the calib r ation process a calibration cup (CCS-1) can be attached to the bottom of the
sensor housing and calibration tubing run from the calibration cup to a convenient place for applying
the calibration gas, e l iminating the need to access the sensor dir e ct l y . In this case, to compensate for
the effect of distance, consider decreasing the calibration tubing length to some length where the end
of the tubing to the gas caniste r i s st i l l accessible or increase the calibration gas flow rate between the
calibration gas cylinder and sensor. Refer to Figure 2-1 for an example of the senso r separation. For
tubing lengths less t han 10 feet (3 meters), use a 0.5 LP M r e g ul at o r and for lengths greater th an 10 feet
(3 meters) use a 1.0 LPM regulator. On initial install, always confirm readings directly at the transmitter
by applying a known gas concentration to the sensor and compare the output from the transmitter.
Readings should be accurate to the gas concentration applied taki ng i nto account the sensor acc uracy
specifications in Section 7.1.2.
Installation Reference Manual
4 Installation
Figure 2-2 Millennium II (M21 or M22) enclosure and sensor dimensions
A B C D E F G
H
Stainless Steel
5.9
150
5.1
130
4.6
117
8.9
226
6.0
152
5.8
147
2.6
66
2.9
74
Aluminum
6.3
160
5.6
142
5.4
137
9.7
246
6.0
152
5.7
145
2.6
66
2.9
74
June 2016 MAN-0084
2.4 Dimensions
The following tables outline the dimensions of the sensor when connected to either the Millennium II
Transmitter (Figure 2-2) or the Millennium II Basic Transmitter/Junction Box (Figure 2-3). Both the
transmitter and senso r en closures are offer ed i n stai nless steel and alu mi num .
in mm in mm in mm in mm in mm in mm in mm in mm
Reference Manual Installation
Installation 5
Figure 2-3 Millennium II Basic (M2B) or junction box (JB) enclosure and sensor dimensions
A B C D E F G H I J
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
In
mm
in
mm
in
mm
Stainless
Steel
4.7
119
3.6
91
3.6
91
4.7
119
5.1
130
0.3
7.6
2.6
66
2.9
74
2.8
71
8.9
226
Aluminum
4.8
122
3.6
91
3.6
91
4.8
122
5.1
130
0.3
7.6
2.6
66
2.9
74
3.0
76
9.0
229
The sensor must alway s b e mounted
as shown in
MAN-0084 June 2016
2.5 Mounting
Prior to mounting the sensor to the transmitter or junction box enclosure apply suitable silicone-free
lubricant to the threadi n g of the 3/4” FNPT (female NPT) conduit entry of the enclosure as well as the
threading on the sensor 3/4” MNPT (male NPT) fi tting. T hi s aids in protecting the enclosures from
water ingress. After the lubricant has been applied properly, fit and tighten the sensor to the
transmitter or junction box enclosure by using appropriate tools.
The transmitter and junction box have mounting holes to allow mounting to a flat surface or pole as
desired. Mounting kit accessories are available to aid in mounting the detector to a flat sur face or a
pole. Contact your local Emerson Process Management representative for detailed information.
vertically such that its mouth is pointed in the downward position
Figure 2-4.
Installation Reference Manual
6 Installation
Figure 2-4 SC310 Sensor mounted to Millennium II series transmitters
Failure to follow these installation guidelines could result in death or serious injury. Ensure that only
qualified personnel perform the installation.
Electrical sho ck could cause de ath or serious injur y . Use extreme caution when making contact with
the leads and terminals.
Do not open the transmitter, sensor, or junction box enclosure when in a classified area or when an
explosive at mosphere may be present unless the p ower to the transmi tter and sensor has been
removed.
Wiring codes and regulations may vary. Wiring must comply with all applicable regulations relating to
the installation of electrical equipment in a hazardous area and is the responsibility of the installer. If in
doubt, consult a qualified
When separating the se nsor from the transmitte r , the use of shielded cable is highly recommend ed to
protect against interference caused by extraneous electrical or electromagnetic noise. In applications
where the wiring
Millennium II Basic Transmitter &
Millennium II Transmitter
3/4” NPT
Locking
collar
Sensor
SC310 Sensor mouth
3/4” NPT
SC310 Sensor
Locking collar
Sensor
3/4” NPT
3/4” NPT
June 2016 MAN-0084
Junction Box
and sintered element
2.6 Wiring
2.6.1 Field installation
pointing
downwards
pointing
downwards
mouth
official before wiring the system.
is installed in conduit, the conduit must not be used for wiring to other equipment.
Reference Manual Installation
Installation 7
Do not open the transmitter, sensor, or junction box enclosure when in a classified ar ea or when an
explosive at mosphere may be present unless the power to the sensor has b e en r emoved.
Figure 2-5 Terminal connection
Table 2-1 Sensor wire colors and terminal definition
Wire color
White
Red
Blue
Black
Green
Marking
+Vdc
Sig A
Sig B
COM
Function
10.5-32 Vdc
Communication
Communication
Common / supply
Earth ground
MAN-0084 June 2016
2.6.2 Sensor separation distance
The maximum separat i o n distance between the sensor and the transmitt e r i s limited by the resist anc e
of the connecting wiring, which is a function of the gauge of the wire being used. It is recommended
that sensor separatio n must not exceed 2000 feet (610 meters) whil e usi ng 16AWG (1.31mm
Refer to Section 6 for wire gauges and resistance values.
2
) wire.
2.6.3 Installation to transmitter or junction box
The SC310 sensor is supplied with a 3/4” NPT male conduit connection and is intended to be mounted
directly to an available 3/4” NPT conduit entry on a Millennium II Transmitter or remotely using a
certified junction box. There is an available offering of certified junction boxes designed specifically to
work with this sensor. Please contact your local Emerson Process Management representativ e fo r
further information.
2.6.4 Sensor wiring
When connecting cable wir es, use a small flathead screwdriver to gently press down and hold the
spring connector open. Insert the appropriate wire into the open connector hole, releasing the
screwdriver to secure the wire. Refer to Figure 2-5 below.
Connect the sensor wires to the Millennium II Transmitter or junction box as per the appropriate
transmitter or junction box manual. Figure 2-6 outlines the connections to a M21 Millennium II
transmitter. Table 2-1 outlines the wire colors and their purpose.
Connection
signal A
signal B
ground
Installation Reference Manual
8 Installation
Figure 2-6 Millennium II M21 sensor wiring
External Earth
June 2016 MAN-0084
2.6.5 External ground
In order to ensure proper operation of the sensor, an external ground is required. The external ground
must be connected to the grounding point on the enclosure according to IECEx requirements. Refer to
Figure 2-7 for grounding connection location.
Figure 2-7 External grounding po int
Ground point
Reference Manual Installation
Installation 9
The S
hours) prior to completing the first
calibration.
The calibration of the
calibration
Due to the nature of catalytic bead sensor technology, calibration o
every three (3) months. In environments where the sensor may be rou
concentrations or airborne contaminants, the sensor should be verified or calibrated on a more
frequent basis.
Since external factors can affect the SC310 sensor’s ability to properly detect gas, it is highly
recommended that quarterl
the gas detection sys te m.
If accessories are used on the SC310, cali b r ations must be compl e ted wi t h these accessories in place.
MAN-0084 June 2016
2.7 Calibration
C310 sensor should be powered up for at least twenty-four (24
catalytic sensor requires th e pr esen ce o f o xygen, as a result, air balanced
gas must be used for calibration, otherwise these sensors will not calibrate properly.
f the SC310 should be c ompleted
tinely exposed to gas
y inspections and bump tests be completed to ensure proper operation of
There are specific steps to be followed when calibrating with a Millennium II Transmitter. Refer to the
appropriate transmi tter manual that the se n so r i s c onnected to for cali b r ati on procedures. These steps
should be followed if accurate results are to be obtained.
2.7.1 K-factor
If methane calibration gas is only available, then a specific correction factor (k-factor) relating to the
target gas (non-methane) can be manually entered in the Millen ni um I I t r ansmitter (M21 or M22).
When using Millennium II Basic analog/HART transmitters (M2B-AH), the k-factor can be set using a
HART Communicator. For non-HART versions, the k-factor will need to be set in the factory or by using
the display on a Mille nnium II transmitter (M 21 or M22).
The appropriate k-factor is dependent on the lower explosive limi t (L E L ) of the desired target gas as
specified by the perfo r m ance standard(s) ap p l icable at the installa tion site. Table 2-2 and Table 2-3
provide k-factors for commo n g ases and their respective LEL values. Use 50% methane calibration gas
with the appropriate % by v o lume as indicated below.
The following tables outline the pr i m ar y d et ec table gases of the sensor; however, multiple o the r g ases
are detectable. Please contact your Emerson Proce ss Management representative for further
information.
Installation Reference Manual
10 Installation
Table 2-2 K-Factors for ISO (North Ame r i c an) LEL values (Cal i b rate with 2.5% by v olume Methane)
Gas
LEL
Correction Factor
Propane
2.1% Volume
1.8
n-Butane
1.8% Volume
2.0
Isobutylene
1.8% Volume
2.1
Hydrogen
4.0% Volume
1.2
Ethane
3.0% Volume
1.4
Pentane
1.4% Volume
2.2
Hexane
1.2% Volume
2.3
Heptane
1.1% Volume
2.7
Ethylene
2.7% Volume
1.5
Propylene
2.4% Volume
1.5
Methanol
6.7% Volume
1.2
Ethanol
3.3% Volume
1.7
Table 2-3 K-Factor s fo r IEC (European) LEL val ues (Calibrate wi th 2.2% by volume M e thane)
Gas
LEL
Correction Factor
Propane
1.7% Volume
2.0
n-Butane
1.4% Volume
1.9
Isobutylene
1.8% Volume
1.7
Hydrogen
4.0% Volume
1.2
Ethane
2.5% Volume
1.5
Pentane
1.4% Volume
1.9
Hexane
1.0% Volume
2.5
Heptane
1.1% Volume
2.4
Ethylene
2.3% Volume
1.6
Propylene
2.0% Volume
1.6
Methanol
5.5% Volume
1.3
Ethanol
3.1% Volume
1.6
June 2016 MAN-0084
Reference Manual Installation
Installation 11
MAN-0084 June 2016
2.8 Installation checklist
Review the following checklist prior to turning the power on to the sensor after installation has been
completed:
□ Ensure that the transmitter and se nsor are properly and firmly mounted
□ Ensure that stopping plugs are securely ti g htened on any unused conduit entr i e s
□ Ensure that the transmitter and se nsor are not obstructed such that they are acc e ssible and the
target gas is not inhibited from reaching the sensor
□ Remove the red protective plastic cap/cover from the sensor mouth
□ If cali b r ati on cups or splash guards are f i tted to the sensor, en sur e t hat they are properl y fitted
□ Ensure adherence to applicable local guidelines and requirements on wiring and sealing of
equipment in hazardous and non-hazardous area s
□ Ensure that proper shielding and grounding practices are adhered to and local codes are being
followed
□ Check system operational voltage and conditions and ensure that they are within the applicable
specifications of the sensor
□ Verify wiring at all termination and junction points (transmitter, junction box, and power supply)
□ If the sen sor housing has been op e ne d, e nsure that the sensor m o d ul e i s p r operly seated and
making a good connection. Refer to Section 4.3 for more details.
□ Perform initial calibration as per Section 2.7.
Operation Reference Manual
12 Operation
Tip
Refer to the relevant transmitter manual pr i o r to attempting a calibration.
Table 3-1 Millennium II Basic transmitter DIP switch 2 positions
Position 1
Position 2
Position 3
Position 4
ON
OFF
OFF
OFF
June 2016 MAN-0084
Section 3: Operation
3.1 Sensor configuration settings
All configuration settings for the SC310 sensor are accessed thro u gh the Millennium II se r i e s o f
transmitters. When using the Millenni um II Transmitter, configur at i o n settings are accessed b y
selecting menu opti o n s thr ough the main display .
3.2 Sensor power up
When power is applied to the sensor by the transm i tter, a warm-up routine will begin and the sensor
will be automatically tested to ensure proper functioning. The warm-up time for the SC310 sensor is
typically thirty (30) seconds. Refer to the Millennium II transm i tter manual (MAN-0076) or the
Millennium II Basic transmitter manual (MAN-0082) for status indicato r s du r i ng this period.
3.3 Sensor communication
The SC310 sensor uses a proprietary protocol to communicate with the Millennium II series of
transmitters. This sensor should never be connected to any device other than the Mi l lennium II seri es
of transmitters. Selected DIP switches and menu options allow communication between the
transmitter and senso r . Configuration settings are stored in the memory of the sensor. Incorrect
settings will cause t he sensor to not communicate properly with the transmitter. If any problems
develop, please refer to the troubleshooting section of this manual.
3.4 Millennium II Basic transmitter configuration
When using the SC310 sensor with the Millennium II Basic transmitter, DIP switch on the transmitter
should be set up as follows:
Reference Manual Maintenance
Maintenance 13
Table 3-2 Fault conditions
Fault condition
Analog output
Fault relay outp ut
Span calibration failure
2.5mA
Fault
Zero calibration failure
2.5mA
Fault
Sensor over-range
2.5mA
Fault
Low temperature
2.5mA
Fault
High temperature
2.5mA
Fault
Low voltage
2.5mA
Fault
High voltage
2.5mA
Fault
Replace sensor (during calibration cycle)
Momentary 2.5mA
Momentary Fault
Memory fault
2.5mA
Fault
Power supply fault
2.5mA
Fault
Sensor nearing end of life (during calibration cycle)
Momentary 2.5mA
Momentary Fault
Sensor weak signal (during calibration cycle)
Momentary 2.5mA
Momentary Fault
MAN-0084 June 2016
3.5 Fault conditions
The SC310 sensor will provide a number of fault conditions that the Millennium II transmitter will
translate into an analog or fault relay output. These fault conditions are outlined in the following table.
3.6 SensorGuard
SensorGuard is a propr i e tar y firmware feature that protects the catal y ti c b e ad sensor from the damage
and/or response shift commonly caused by exposure to high concentrations of combustib l e g as. Wi th
this feature, repeated or lengthy exposure to high gas concentrations has negligi bl e effect on sen sor
performance. Sensor life is prolonged and the calibration frequency is reduced. This does not
eliminate the necessity of periodic senso r r e sp o nse c hecks which should be p er f o r m ed as part of an
effective maintenance schedule.
If a gas signal exceeds 1 00% LEL, the Millennium I I se r i e s transmitters will l atc h the output of the senso r
at 20 mA and the display o f t he M illennium II Transmitter will flash ‘100% LEL’ continually until power is
recycled or a manual reset is initiated. Refer to ‘manual reset’ in the Millennium II Transmitter manual
(MAN-0076) or the Millennium II Basic Trans m i t ter m anual (MAN-0082).
If the gas signal exceeds 105% LEL, the sensor will deactivate the sensing element to protect it from
extreme drift or damage caused by high gas con centrations. This p r o te c ti ve feature extends the useful
lifetime of the sensor and reduces or eliminates disruption of its calibration. As an extra safety
precaution, the sen so r should be checked for acc uracy after an over-range exposure and if necessary recalibrated. The sensor will need to be reset to clear the latched output.
Maintenance Reference Manual
14 Maintenance
Paints, silicone, silicon-containing compounds and other volatile compounds pose a hazard to catalytic
bead sensors. Activities involving these compounds should be limited if not removed from around the
sensor.
A blocked sinter impairs sensor performance. If a sinter element is blocked, please dislodge the
material blo c ki ng the sensor to ensure sensor perfo rmance as specified.
June 2016 MAN-0084
Section 4: Maintenance
4.1 Sensor poisoning
Certain compounds, incl ud i ng halogen-containing hydro carbons, ca n reduce sensor response. In some
instances this reduct i o n i n r esponse is reversible and the sensor will op e r ate no r mally when such a
compound or gas is removed. Exposure to organic phosphates, esters, and silicon-containing
compounds will poison the sensor, resulting in an irreversible loss in sensitivity. This loss in sensitivity i s
because the poisoning compound will coat the active catalytic bead, limiting the necessary reaction
required to detect the presence of hydrocarbon gases. Because of this, routine bump tests, outlined in
4.3, and calibrations, outlined in 2.7, need to be completed on a routine basis.
4.2 Cross sensitivities
Catalytic bead sensors react to airbor ne mat er ials that burn in oxyg e n atm o spheres, such as gaseous
hydrocarbons; ther ef o r e , the SC310 sensor will b e c r oss sensitive to all combustible gases. The
response given by the sensor is dependent upon the k-factor se tting and the hydrocar b o n g as that has
come in contact with the sensor.
4.3 Routine inspections
The Millennium II SC 310 sensor should be insp ec ted on a routine basi s to e nsure that external
obstructions such as water, mud, snow, pl asti c b ags, or other materials are not blocking the sintered
element of the sensor. If the sintered element is sprayed with water, the sintered ele ment mu st be
allowed to dry to ensure specified performance.
4.4 Bump testing
As part of the site preventative maintenance program It is recommended that a bump test of the
sensor be completed every three (3) mo nths. Bump testing consists of a visual inspection of the
sensor, applying a kn o wn gas concentration to the sensor ver i f y i n g t he ac c ur ac y o f the response to the
specifications of the sensor, and alarm system simulation. If the response i s o u tsi d e of the
specifications of the sensor a calibration should be completed. Refer to 2.7 for more information. After
a calibration has been completed, it is recommended that a bump test be completed to verify accuracy
and response of the se nso r .
Reference Manual Maintenance
Maintenance 15
Do not open the transmitter, sensor, or junction box enclosure when in a classified area or when an
explosive at mosphere may be present unless the p ower to the sensor has been removed.
Avoid touching any electronic components, as they m ay be su scep tibl e to el ec tr ostatic discharge
(ESD). Refer to Section 5 for further information and proper handling instructions of electronic
components.
MAN-0084 June 2016
4.5 Sensor replacement procedure
Sensors are pre-cali b r ate d at the factory; however, field cali bration must be performed as a part of
commissioning. When a calibration can no longer be performed or the sensor is not operating
properly, the sensor module may need to be replaced. Refer to steps below for replacing the sensor
module.
1. Remove power from the sensor.
2. Remove the locking ring by loosening the set crews with 1.5 mm Allen Key tool.
3. Remove the bottom part of the sensor enclosure by turning it in a counter clockwise rotation to
expose the sensor module.
4. Carefully remove the sensor module from the sensor housing by pulling on the Teflon pull tab until
the sensor module has been fully removed from the housing. NOTE: DO NOT TWIST THE SENSOR
MODULE.
5. Properly dispose of the old sensor module as per local guidelines and regulations.
6. Remove the replacement sensor module from its packaging ensuring not to touch any electronic
components as this may cause problems due to an unwanted electro static discharge ( ESD) .
7. Align replacement sensor module with pins inside top section of the enclosure base and push on
the outer plastic ring unti l sensor is seated properly . DO N OT PU SH ON CENTER ELEMENT.
8. Install and hand-tighten the bottom part of the sensor enclo sure by turni ng it in a clockwise
direction.
9. Install the locking r ing by tightening the set screws with 1.5 mm Allen Key tool.
10. Restore power to sensor via the transmitter.
4.6 Troubleshooting
Sensors and transmitters are not designed to be repaired in the field. If problems should develop, first
check for faulty wiring, confirm proper voltage to sensor, and attempt a calibration. If problems persist,
please contact the Flame and Gas Detection c ustomer care team fi r st by phone to try and resolve any
issues. If issues canno t b e r esolved, please fol low the procedure in Section 1.3.
4.7 Storage
The sensor and its electronic components/parts should be stored in locations free from dust, liquid
spills, contaminants, and moisture. The storage temperature should be well within the limits of the
certified temperatures of the equipment. See Section 7 for certified temperatures.
Maintenance Reference Manual
16 Maintenance
Description
Part Number
Calibration cup/sp l ash guard
CCS-1
Calibration Kit
CAL-KIT-1
Calibration Gas
CAL-CYL-AIR (103L Air)
CAL-CYL-PRO (103L Propane)
Ingress protection filter
IPF-001
Separation kit
JB-MPD-A - aluminum
JB-MPD-S - stainless ste el
Replacement sensor module
SC310-100
The SC310 sensor is not c er tified for performance when the calibration cup, ingress protection filter, or
dust guard is attached.
June 2016 MAN-0084
4.8 Spare parts and accessories
CAL-CYL-BUT (103L Butane)
CAL-CYL-ETH-A-50 (103L Ethylene)
CAL-CYL-HYD (103L Hy d rogen)
CAL-CYL-METH (103L M ethane)
CAL-CYL-PEN (103L Pentane)
Reference Manual Electrostatic sensitive device
Electrostatic sensitive device 17
MAN-0084 June 2016
Section 5: Electrostatic sensi ti ve d evi ce
Definition: Electrostatic discharge (ESD) is the transfer, between bo di es, of an electrostatic charge
caused by direct contact or induced by an electrostatic field.
The most common cause o f E SD i s p hysical contact. Tou ching an object can cause a discharge of
electrostatic energy (ESD). If the charge is sufficient and occurs near electronic components, it can
damage or destroy those components. In some c ases, damage is instantaneous and an immediate
malfunction occur s. Ho wever, symptoms are not always immediate—performance may be marginal or
seemingly normal for an indefinite period of time, followed by a sudden failure.
To eliminate potential ESD damage, review the following guidelines:
• Handle boards by metal shields—taking care not to touch electronic components.
• Wear grounded wrist or foot straps, ESD shoes or heel g r o un de r s to dissipate unwanted static
energy.
• Prior to handling boards, dispel any charge in your body or equipment.
• Ensure all compone nts are transported and sto r ed i n static safe packaging
• When returning boards, carefully package in the original carton and static protective wrapping
• Ensure ALL personnel are ed uc ated and trained in ESD Control Pr o ce dur e s
In general, exercise accepted and proven precautions normally observed when handling electrostatic
sensitive devices. A warning label is placed on the packaging, identifying product using electrostatic
sensitive semiconductor devices.
Wire resistance table Reference Manual
18 Wire re s istance table
Distance
Feet (Meters)
AWG #20
0.5mm2
AWG #18
0.8mm2
AWG #16
1.3mm2
AWG #14
2.0mm2
100 (30.5)
1.02
0.64
0.40
0.25
200 (61)
2.03
1.28
0.80
0.51
300 (91.4)
3.05
1.92
1.20
0.76
400 (121.9)
4.06
2.55
1.61
1.01
500 (152.4)
5.08
3.20
2.01
1.26
600 (182.9)
6.09
3.83
2.41
1.52
700 (213.4)
7.11
4.47
2.81
1.77
800 (243.8)
8.12
5.11
3.21
2.02
900 (274.3)
9.14
5.75
3.61
2.27
1000 (304.8)
10.20
6.39
4.02
2.53
1250 (381)
12.70
7.99
5.03
3.16
1500 (457.2)
15.20
9.58
6.02
3.79
1750 (533.4)
17.80
11.20
7.03
4.42
2000 (609.6)
20.30
12.80
8.03
5.05
2250 (685.8)
22.80
14.40
9.03
5.68
2500 (762)
25.40
16.00
10.00
6.31
3000 (914.4)
30.50
19.20
12.00
7.58
3500 (1066.8)
35.50
22.40
14.10
8.84
4000 (1219.2)
40.60
25.50
16.10
10.00
4500 (1371.6)
45.70
28.70
18.10
11.40
5000 (1524)
50.10
32.00
20.10
12.60
5500 (1676.4)
55.80
35.10
22.10
13.91
6000 (1828.8)
61.00
38.30
24.10
15.20
6500 (1981.2)
66.00
41.50
26.10
16.40
7000 (2133.6)
71.10
44.70
28.10
17.70
7500 (2286)
76.10
47.90
30.10
19.00
8000 (2438.4)
81.20
51.10
23.10
20.20
9000 (2743.2)
91.40
57.50
36.10
22.70
10000 (3048)
102.00
63.90
40.20
25.30
June 2016 MAN-0084
Section 6: Wire resistance table
Resistance shown is one way. This figure must be doubled when determining closed loop resistance.
Reference Manual Specifications
Specifications 19
MAN-0084 June 2016
Section 7: Specifications
7.1 Electrical
7.1.1 Voltage range
10.5 to 32 Vdc
7.1.2 Power consumption
(10.5 – 32 Vdc) < 1.5 W
7.2 Performance
7.2.1 Response time*
• T50 ≤ 5.5 seconds
• T60 ≤ 6 seconds
• T90 ≤ 12 seconds
* Methane at room temperature
7.2.2 Accuracy
±3% < 50% | ±5% > 50%
7.2.3 Zero Drift
± 2% per month
7.2.4 Repeatability
± 1% LEL full scale
7.2.5 Detection Range
0-100% LEL
7.2.6 Calibration Frequency
Three (3) months
7.2.7 Storage temperature
-40°F to +158°F (-40°C to +70°C )
7.2.8 Operating temperature
-40°F to +167°F (-40°C to +75°C)
Specifications Reference Manual
20 Specifications
June 2016 MAN-0084
7.2.9 Relative humidity
0-95% relative humidity, non-condensing
7.2.10 Metallurgy (housing)
316 Stainless stee l and 6061 aluminum
7.2.11 Ingress protection
IP64
7.2.12 Weight
Stainless steel: 3.5 lbs, 1.4 kg
Aluminum: 1 lb, 0.4 kg
7.3 Separation
Up to 2000 feet (610 meters) with 16 AWG (1.31 mm2) wire.
7.4 Warranty
Five (5) years
Reference Manual Certifications
Certifications 21
MAN-0084 June 2016
Section 8: Certifications
8.1 North America
8.1.1 Hazardous locations
Class I, Division 1, Groups BCD T5
Class I, Zone 1, AEx/Ex d IIB +H
-40 °C ≤ Ta ≤ +75 °C
8.1.2 Performance
CSA C22.2 No. 152:2006
FM Class 6310, 6320:2001
ANSI/ISA 12.13.01:2000
T5
2
8.2 IECEx
Ex d IIB+H2 T5 Gb
IECEx FMG 12.0007X
-40 °C ≤ Ta ≤ +75 °C
Special conditions for safe use:
• Consult the manufacturer if dimensional information on the flameproof joints is necessary.
• The flying leads of the Millennium II sensor shall be suitably protected against mechanical damage
and terminated within a terminal or junction facility suitable for the conditions of use.
Certifications Reference Manual
22 Certifications
June 2016 MAN-0084
8.3 FC Models
SC310 catalytic bead sensors, models SC310x-100-ASSY-FC, when used with wireless capable
Millennium II transmitters, carry the following certifications. All certifications outlined above do not
pertain to these models.
8.3.1 North America (-FC models)
Class I, Division 1, Groups BCD T5
Class I, Zone 1, AEx/Ex d IIB+ H
-40 °C ≤ Ta ≤ +75 °C
CSA C22.2 No. 152, FM6320
8.3.2 IECEx (-FC models)
Ex d IIB+H2 T5 Gb
-40 °C ≤ Ta ≤ +75 °C
IECEx FMG 12.007X
T5
2
8.3.3 Special conditions for safe use
Consult the manufacturer if dimensional information on the flameproof joints is necessary.
The flying leads of the Millennium II sensor shall be suitably protected against mechanical damage and
terminated within a terminal or junction facility suitable for the conditions of use.
Reference Manual Ordering information
Ordering information 23
Model
Description
SC310
Millennium II Catalytic Bead Combustible Sensor
Housing
Description
-A
Aluminum
-S
Stainless Steel
Range
Description
-100-ASSY
100% LEL
Wireless
Description
When used with wireless capable Millennium II
MAN-0084 June 2016
Section 9: Ordering information
-FC
transmitters
Notes
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Emerson Process Management AG
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MAN-0084
Revision 8
June 2016
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