Rosemount Manual: UNI-TRAN UT-B-NL-SC1100 Basic-Non-Latching-Combustible Gas Transmitter | Rosemount Manuals & Guides

UNI-TRAN BASIC

Non-Latching

COMBUSTIBLE GAS TRANSMITTER

User Manual

UT-B-NL-SC1100

Part Number: MAN-0065-00 Rev 1

June 2003

IMPORTANT INFORMATION

This manual is for informational purposes only. Although every effort has been made to ensure the

correctness of the information, technical inaccuracies may occur and periodic changes may be made

without notice. Net Safety Monitoring Inc., assum es no responsibility for any errors contained within this

manual.

If the products or procedures are used for purposes other than as described in the manual, without

receiving prior confirmation of validity or suitability, Net Safety Monitoring Inc., does not guarantee the

results and assum es no obligation or liability.

No part of this manual may be copied, disseminated or distributed without the express written consent of

Net Safety Monitoring Inc.

Net Safety Monitoring Inc., products are carefully designed and manufactured from high quality

components and can be expected to provide m any years of trouble free service. Each product is

thoroughly tested, inspected and calibrated prior to shipment. Failures can occur which are beyond the

control of the manufacturer. Failures can be minimized by adhering to the operating and maintenance

instructions herein. Where the absolute greatest of reliability is required, redundancy should be designed

into the system.

Warranty

Net Safety Monitoring Inc., warrants its sensors against defective parts and workmanship for a period of

24 months from date of purchase; other electronic assemblies for 36 months from date of purchase.

No other warranties or liability, expressed or implied, will be honoured by Net Safety Monitoring Inc.

Contact Net Safety Monitoring Inc., or an authorized representative for details.

We welcome your input at Net Safety Monitoring. If you have any comments please contact us at the

phone/address below or visit our web site and complete our on-line customer survey: www.net-safety.com.

Contact Information

Net Safety Monitoring Inc.

2721 Hopewell Place NE

Calgary, AB T1Y 7J7

Telephone: [phone] Fax: [phone]

www.net-safety.com

E-mail: [e-mail]

Copyright © 2003 Net Safety Monitoring Inc.

Printed in Canada

Table of Contents

Unit I GENERAL INFORMATION ........................................ 1

DESCRIPTION ...................................................................... 1

FEATURES ........................................................................ 1

SENSOR SPECIFICATIONS .................................................... 2

CONTROLLER SPECIFICATIONS................................................ 3

Figure 1- Dimensions for Adalet Enclosure.......................................... 4

Unit II SYSTEM INSTALLATION......................................... 5

INSTALLATION ..................................................................... 5

Location of Sensors............................................................ 5

Un packi ng ................................................................... 5

Mounting .................................................................... 5

Wiring ...................................................................... 5

Sensor Separation ............................................................ 6

Current Output................................................................ 7

Figure 2 Uni-Tran basic terminal arrangement ....................................... 7

Figure 3 Uni-Tran Terminal connection diagram for Non Isolated current output . . . . . . . . . . . . 8

Figure 4 Uni-Tran Basic Functionality .............................................. 8

Figure 5 Wiring diagram with sensor separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

ANALOG OUTPUT ........................................................... 10

SENSOR DRIFT ............................................................. 10

SENSOR LIFE............................................................... 10

UNIT III SYSTEM CALIBRATION ....................................... 11

CALIBRATION .................. ..................... .................. ............ 11

CALIBRATION PROCEDURE ......................................................... 11

SENSOR POISONS and INHIBITORS .................................................. 12

TABLE 1 SYSTEM RESPONSES ................................................ 13

IMPORTANT INFORMATION ......................................................... 14

How to Return Equipment ............................................................ 15

Appendix A Electrostatic Sensitive Device Handling . . . . . . . . . . . . . . . . . . . . . . 16

Appendix B Wire Resistance In Ohms .................................. 17

Unit I GENERAL INFORMATION

DESCRIPTION

The Uni-Tran SC1100 (UT-B-NL-SC1100) micro-controller based LEL gas detector provides
fast, accurate, continuous and cost effective monitoring of combustible gases in harsh industrial
environments.

The SC1100 is a proven, poison resistant, pellistor sensor utilizing active and reference
catalytic beads in a Wheatstone Bridge configuration. The Wheatstone Bridge generates a
temperature compensated differential voltage, that is proportional to a gas concentration when
exposed to a wide range of hydrocarbon gases.

The use of advanced micro-controller technology provides a user interface, that is
comprehensive yet very simple to use. Pellistor type, catalytic sensors are highly reliable, but in
conventional systems the sensing element is damaged when exposed to high concentrations of
combustible gas. SensorGuard is a proprietary technology that provides effective protection
against this type of damage, thus reducing the need for frequent calibration and enhancing
reliability.

FEATURES

< Widely proven Poison Resistant Catalytic Bead sensor technology

< SensorGuard software based protection

< Low power consumption that works with 12 or 24 V dc systems

< Sensor can be remotely mounted up to 100 feet from the display module

< Gas specific colour coded enclosure

< Microprocessor based smart transmitter

< Conformal coated circuit boards

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SENSOR SPECIFICATIONS

< Operating Temperature:

-40/C to +85/C (-40F to +185F)

< Range of Detection:

0 to100% LEL of most hydrocarbons and hydrogen

< Accuracy:

±3% LEL up to 50% LEL

±5% LEL above 50% LEL.

< Response Time to 90% (100% LEL applied):

<10 seconds to T50

<30 seconds to T90

< Linearity:

±3% LEL

< Repeatability:

+ 2% LEL

< Dimensions:

Refer to Figure 1

< Weight:

0.1 Kg (0.2 lb)

< Approvals and Certifications

CSA and NRTL/C certified for hazardous locations. Class I, Division 1,

Groups B, C and D. IEC Rating Ex d IIB+H2 T5, NEMA 3R. Performance

certified to CSA 22.2 No. 152

2

< Enclosure Material:

Aluminum (Optional Stainless Steel)

CONTROLLER SPECIFICATIONS

< Operating Voltage Range:

10.5 to 32.0 V dc

< Power Consumption (at 24 V dc):

Nominal (100 mA, 2.4 Watts) Maximum (200 mA, 4.8 Watts)

< Operating Temperature:

-40/C to +85/C (-40F to +185F)

< Weight:

0.9 Kg (2.0 lb)

< Approvals and Certifications:

CSA and NRTL/C certified for hazardous locations. Class I, Division 1,
Groups C and D. IEC Rating Ex d IIB T5

Option Housing for Class 1, Division 1, Group B - UT-B2-NL-SC1100

NOTE: Electronics only - CSA and NRTL/C certified for hazardous
locations Class I, Division 2 Groups B, C and D pending.

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< Current Output:

4 to 20 mA - Into a maximum loop impedance of 800 Ohms at 32 V dc or 150 Ohms at

10.5 V dc. Isolated or non-isolated loop supply

Figure 1 - Enclosure Dimensions

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Unit II SYSTEM INSTALLATION

INSTALLATION

Location of Sensors

There are no absolute rules for determining the quantity and location of gas detection heads to
protect any particular facility. Locate the sensors carefully in all areas where gas may escape
and where it is desirable to detect the presence of unwanted gas. Use redundancy where
enhanced protection or reliability is desired. Light gases such as methane tend to rise while
heavy gases such as propane tend to accumulate in low areas. Seek advice from experts who
know the characteristics of the gas being detected, air movement patterns and the facility. Use
common sense and refer to various publications that discuss general guidelines for your
industry.

Unpacking

The housing and terminal board are a single assembly to which the sensor is wired.

Mounting

The housing should be oriented so that the sensor is on the under-side of the housing. Use a
conduit seal and conduit loop or trap on the field wiring side to prevent water or condensation
from entering the housing through the conduit or its threaded connection.

Wiring

NOTE: Before opening the detector ensure that the area has been declassified, or
remove power from the unit.

NOTE: Since all modern electronic equipment can be damaged by static electricity
discharge it is important to discharge static electricity from your body by touching a
grounded metal object before handling the module.

NOTE: The wiring procedures in this manual are intended to ensure proper functioning
of the device under normal conditions. However, because of the many variations in
wiring codes and regulations, total compliance to these ordinances cannot be
guaranteed. Be certain that all wiring complies with applicable regulations that relate to
the installation of electrical equipment in a hazardous area. If in doubt, consult a
qualified official before wiring the system.

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