Emerson Rosemount 975 Series Reference Manual
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Emerson Rosemount 975 Series Reference Manual

Flame detectors
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Reference Manual
00809-1400-4975, Rev AA
June 2021
™
Rosemount
975
Flame Detectors

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Summary of Contents for Emerson Rosemount 975 Series

  • Page 1 Reference Manual 00809-1400-4975, Rev AA June 2021 ™ Rosemount Flame Detectors...
  • Page 2 Emerson does not assume any liability arising out of the application or any use of any product or circuit described herein;...
  • Page 3 WITHOUT LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF BUYER'S CUSTOMERS. Technical support To get technical support for this product, contact your local Rosemount representative or the Rosemount Technical Support department at +1 866 347 3427 or safety.csc@emerson.com Abbreviations and acronyms Abbreviation or acronym Definition...
  • Page 4 Abbreviation or acronym Definition Unified coarse thread Volts alternating current Volts direct current...

  • Page 5: Table Of Contents

    Reference Manual Contents 00809-1400-4975 June 2021 Contents Chapter 1 Introduction......................7 1.1 Product overview.........................7 1.2 Models............................7 Chapter 2 Installation.........................9 2.1 Installation guidelines........................9 2.2 Preparation for use........................10 2.3 Attach detector to tilt mount.....................10 2.4 Open the back cover........................11 2.5 Wire terminals and ground cable....................
  • Page 6 Contents Reference Manual June 2021 00809-1400-4975 Appendix B FM fuel test responses ..................... 33 Emerson.com/Rosemount...

  • Page 7: Chapter 1 Introduction

    June 2021 Introduction Product overview The Rosemount 975 series is based on proven technologies, including triple infrared (IR3) and ultraviolet infrared (UV/IR). The Rosemount 975 series provides the fastest response to fire, longest distance detection, and revolutionary UV/IR technology, coupled with superior immunity to false alarms, functioning in harsh conditions with unparalleled reliability and durability.
  • Page 8 20 msec, and features a unique dual sensor with selectable UV and IR channels that can be used separately or combined. The detector is designed to detect hydrocarbon-based fuel and gas fires. Table 1-1: Rosemount 975 Series General Technical Specifications Spectral response Infrared and ultraviolet bands...

  • Page 9: Chapter 2 Installation

    Reference Manual Installation 00809-1400-4975 June 2021 Installation Installation guidelines Installation should comply with NFPA 72E or any other local and international regulations and standards, as applicable to flame detectors and installation of Ex approved products. To ensure optimal performance and efficient installation, consider the following guidelines.

  • Page 10: Preparation For Use

    3. Thread the holding screw and tighten it. Note To change the detector field of view, release the horizontal and vertical locking screws. 4. Point the detector toward the protected area and ensure the view of the area is unobstructed. Emerson.com/Rosemount...

  • Page 11: Open The Back Cover

    Reference Manual Installation 00809-1400-4975 June 2021 5. Secure the detector in that position by tightening the locking screws on the tilt mount. The detector is now correctly located, aligned, and ready to be connected to the system. Open the back cover Procedure 1.
  • Page 12 Installation Reference Manual June 2021 00809-1400-4975 Procedure 1. Connect the terminals according to Table 2-2. The terminal details are also on the inside back cover. Figure 2-1: Terminal Box Emerson.com/Rosemount...
  • Page 13 Reference Manual Installation 00809-1400-4975 June 2021 Table 2-2: Terminal Box Terminal Function 24 Vdc (+) 24 Vdc (-) External built-in test (BIT) switch Fault relay - normally open Fault relay Fault relay - normally closed Alarm relay - normally open Alarm relay Alarm relay - normally closed 0-20 mA (+)
  • Page 14 3. Check the wires for secure mechanical connection and press them neatly against the terminal to prevent them from interfering while closing the back cover. 4. Close the terminal compartment by screwing the back cover on to the housing. Emerson.com/Rosemount...

  • Page 15: Install The Protective Cover

    Reference Manual Installation 00809-1400-4975 June 2021 5. Tighten the back cover security screw. Figure 2-6: Closing Security Screw A. Back cover security screw B. Ground cable connection point 6. Connect the ground cable. WARNING The terminal temperature may be higher than 185 °F (85 °C). CAUTION To comply with EMC directive 2014/30/EU and protect against interference caused by radio frequency interference (RFI) and electromagnetic interference (EMI), shield...

  • Page 16: Aim The Detector

    Response time • Heated optics functionality • Alarm delay • Accessory relay options • Alarm latch • Field of view integrity indication Refer to the Modbus Manager Manual or HART protocol Reference Manual for instructions on changing these settings. Emerson.com/Rosemount...

  • Page 17: Chapter 3 Operation

    Reference Manual Operation 00809-1400-4975 June 2021 Operation Power up the detector This section describes how to turn on the detector. Procedure After connecting the detector to power, wait up to 60 seconds for the detector to completed the initial start-up procedure. Note Turning on the detector initiates the following sequence of events: a.
  • Page 18 Operation Reference Manual June 2021 00809-1400-4975 Postrequisites For full instructions on testing with a flame simulator, see the relevant Reference Manual. Table 3-2: Flame Simulator Reference Manuals Rosemount Flame Simulator Reference Manual FS-HR-975 00809-0900-4975 FS-IR-975 00809-0500-4975 FS-UVIR-4975 00809-0800-4975 Emerson.com/Rosemount...

  • Page 19: Chapter 4 Initial Setup

    Reference Manual Initial setup 00809-1400-4975 June 2021 Initial setup Continuous feature test The detector is supplied with default settings, containing Continuous Feature Test. To ® change these settings, refer to Modbus Manager Manual. During normal operation, the detector tests itself continuously and indicates a fault if a failure is found.
  • Page 20 As result of unsuccessful automatic/manual BIT, the fault relay deenergizes. Manual BIT Manual BIT can be initiated using the Modbus Manager or HART communicator. Connecting terminal 3 to ground also initiates manual BIT. Alarm duration during manual BIT is configurable using the Modbus Manager or HART communicator. Emerson.com/Rosemount...

  • Page 21: Chapter 5 Maintenance

    Reference Manual Maintenance 00809-1400-4975 June 2021 Maintenance Keeping maintenance records Maintenance operations performed on a detector should be recorded in accordance with site guidance and requirements. Clean the detector Procedure 1. Disconnect power from the flame detector. 2. Wipe the detector housing with clean water and a damp cloth. CAUTION Do not use a brush or sharp tools.
  • Page 22 Maintenance Reference Manual June 2021 00809-1400-4975 Emerson.com/Rosemount...

  • Page 23: Chapter 6 Troubleshooting

    Reference Manual Troubleshooting 00809-1400-4975 June 2021 Troubleshooting LED is off, fault relay is open, 0-20mA shows 0mA, analog voltage output is 0V Cause No power to the unit. Recommended actions 1. Check that the operating voltage is correct, according to Electrical specifications.

  • Page 24: Led Constantly Red, Alarm Relay Energized, 0-20Ma Indicates Alarm

    No HART is available at 0mA level. Recommended actions For fault mode, the default indication is 1mA. This can be configured to 0mA. This is not recommended when using a HART connection in order to preserve the HART communication. Emerson.com/Rosemount...

  • Page 25: Specifications

    Reference Manual Specifications 00809-1400-4975 June 2021 Specifications Technical specifications Spectral response Rosemount 975MR Four IR bands between 4μm and 5μm Rosemount 975HR Four IR bands between 2μm and 5μm Rosemount 975UF UV: 0.185 - 0.260 μm IR: 2.5-3.0 μm Rosemount 975UR UV: 0.185 - 0.260 μm IR: 4.3 –...
  • Page 26 Rosemount 975UF Rosemount 975UR 50msec for 1ft diameter sphere LPG-air mixture 50msec for 1ft diameter sphere LPG-air mixture explosion at 66ft/20m explosion at 33ft (10m) Sensitivity ranges Note All distances relate to detection of a 1ft (0.1m ) n-heptane fire Emerson.com/Rosemount...

  • Page 27: Electrical Specifications

    Reference Manual Specifications 00809-1400-4975 June 2021 Table 7-5: Rosemount 975 Models Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR Six ranges: Three ranges: 10ft (3m), 50ft (15m),, 100ft (30m), 150 (45m), 10ft (3m), 50ft (15m), 92ft (28m) 215 (65m), 300ft (90m) Field of view Table 7-6: Rosemount 975 Models Rosemount 975MR...

  • Page 28: Mechanical Specifications

    4 x 4.6 x 6.18 inches (100.6 x 117 x 155 mm) Weight Stainless steel detector: 6.3 lb (2.9 kg) Aluminum detector: 2.8 lb (1.3 kg) Tilt mount 2.5 lb (1.1 kg) Rosemount 975 flame detectors also have a low power heater option Emerson.com/Rosemount...
  • Page 29 Reference Manual Specifications 00809-1400-4975 June 2021 Environmental standards DNV 2-4 Water and dust IP66 and IP68 per EN60529 Rosemount 975...
  • Page 30 Specifications Reference Manual June 2021 00809-1400-4975 Emerson.com/Rosemount...

  • Page 31: Appendix A Reference Data

    3. Scroll down to Documents and Drawings. 4. Select DATA SHEETS & BULLETINS 5. Select the appropriate Product Data Sheet. Product certifications and installation drawings To view current Rosemount 975 Series product certifications and installation drawings, follow these steps: Procedure 1. Go to Emerson.com/en-us/catalog/flame-detectors 2.
  • Page 32 Reference data Reference Manual June 2021 00809-1400-4975 Emerson.com/Rosemount...
  • Page 33 Reference Manual FM fuel test responses 00809-1400-4975 June 2021 FM fuel test responses Results of the FM fuel tests are as follows: Table B-1: Fuel Rosemount Rosemount Rosemount Rosemount 975MR 975HR 975UF 975UR Gasoline N-Heptane Diesel fuel Kerosene Alcohol 95% Methanol Methane Polypropylene...
  • Page 34 FM fuel test responses Reference Manual June 2021 00809-1400-4975 Table B-1: (continued) Fuel Rosemount Rosemount Rosemount Rosemount 975MR 975HR 975UF 975UR Battery Plume fire: 0.75m high, 0.25m wide Only for UV detector. 1.5 inches 10 pieces per test. One battery cell. Emerson.com/Rosemount...
  • Page 35 Reference Manual 00809-1400-4975 June 2021 Rosemount 975...
  • Page 36 2021 Emerson. All rights reserved. Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Emerson family of companies. All other marks are the property...

This manual is also suitable for:

Rosemount 975mrRosemount 975hrRosemount 975ufRosemount 975ur

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