Emerson Rosemount 975 Manual
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Emerson Rosemount 975 Manual

Emerson Rosemount 975 Manual

Flame detectors
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Manual
00809-1400-4975, Rev AC
September 2023
Rosemount
™
975
Flame Detectors

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Summary of Contents for Emerson Rosemount 975

  • Page 1 Manual 00809-1400-4975, Rev AC September 2023 Rosemount ™ Flame Detectors...
  • Page 2 Emerson. While great efforts have been made to ensure the accuracy and clarity of this document, Emerson assumes no liability resulting from any omissions in this document or from misuse of the information obtained herein. The information in this document has been carefully checked and is believed to be entirely reliable with all of the necessary information included.
  • Page 3 Abbreviation or acronym Definition End of line Field of view HART ® Highway addressable remote transducer - communication protocol Immune at any distance IECEx International Electrotechnical Commission Explosion Isopropyl alcohol Infrared Type of jet fuel Latching Refers to relays remaining in the ON state even after the ON condition has been removed.

  • Page 5: Table Of Contents

    6.4 Light-emitting diode (LED) constantly red, alarm relay energized, 0-20 mA indicates alarm..........................32 ® 6.5 No HART communication, 0-20 mA shows 0 mA..............32 Chapter 7  Specifications...........................33 7.1 Technical specifications......................33 7.2 Electrical specifications......................35 7.3 Mechanical specifications......................36 Appendix A  Reference data........................39 A.1 Ordering information, specifications, dimensional drawings, and installation drawings............................39 A.2 Product certifications........................39 Rosemount 975...
  • Page 6 Contents Manual September 2023 00809-1400-4975 Appendix B  FM fuel test responses ......................41 Appendix C  Immunity to false alarm sources..................43 Emerson.com...

  • Page 7: Chapter 1 Introduction

    1.1  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 Introduction Manual September 2023 00809-1400-4975 Table 1-1: Rosemount 975 Series general technical specifications Spectral response Infrared and ultraviolet bands Response time Varies according to model, typically under 5 seconds Field of view Varies according to model, up to 100 degrees Output...

  • Page 9: Chapter 2 Installation

    The installation sequence may vary according to the physical structure of the site. Note Installation steps are also detailed in the Rosemount 975 Quick Start Guide supplied with the detector. The following tools are required for installation. These are standard tools and are not supplied with the detector.
  • Page 10 Flat screwdriver 2.5 mm Connect wires to the terminal blocks. Hex key ⅜-in Stop plug ¾-in. NPT. Open wrench 28 mm Stop plug M25 only. 2.2.1  Field of view Figure 2-1: Horizontal field of view for Rosemount 975MR, 975UF, and 975UR Emerson.com...
  • Page 11 Manual Installation 00809-1400-4975 September 2023 Figure 2-2: Vertical field of view for Rosemount 975MR, 975UF, and 975UR • +50 ° (down) • -45 ° (up) Gasoline For Rosemount 975HR. • Horizontal: 80 ° • Vertical: 80 ° Rosemount 975...
  • Page 12 Installation Manual September 2023 00809-1400-4975 Figure 2-3: Vertical and horizontal field of view for gasoline Hydrogen For Rosemount 975HR. • Horizontal: 90° • Vertical: 90° Figure 2-4: Horizontal field of view for hydrogen Emerson.com...
  • Page 13 Manual Installation 00809-1400-4975 September 2023 Figure 2-5: Vertical field of view for hydrogen Rosemount 975...

  • Page 14: Attach Detector To Tilt Mount

    2. The device is provided with two plastic plugs (See image below). The stainless-steel stop plug used to seal the unused conduit will be included in the device. Remember, seal the detector with the stainless-steel plug before use. Refrain from losing the plug in any case Emerson.com...

  • Page 15: Open The Back Cover

    6. 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. 2.4  Open the back cover Procedure 1. Loosen the back cover security screw. Rosemount 975...
  • Page 16 Installation Manual September 2023 00809-1400-4975 A. Back cover security screw B. Protective plug 2. Unscrew the back cover. Note The back cover is attached by a security cable. 3. Remove the protective plug. Emerson.com...

  • Page 17: Wire Terminals And Ground Cable

    00809-1400-4975 September 2023 2.5  Wire terminals and ground cable NOTICE Improper wiring may damage the detector. Procedure 1. Connect the terminals according to Table 2-2. The terminal details are also on the inside back cover. Figure 2-8: Terminal box Rosemount 975...
  • Page 18 (de-energized) and open in alarm status (energized). When the alarm/accessories relay wiring option is NO, the relay contact is open in normal status (de-energized) and closed in alarm status (energized). 2. Use Figure 2-9, Figure 2-10, Figure 2-11, and Figure 2-12 for typical wiring configurations. Emerson.com...
  • Page 19 C. Second detector D. Last detector E. Power supply F. Alarm loop G. End of line Figure 2-10: Non-isolated sink (three wires) A. Detector B. Controller C. Input power: 18 to 32 VDC D. Return E. 0-20 mA meter Rosemount 975...
  • Page 20 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...
  • Page 21 For straight threads, a minimum of seven threads must be engaged. For tapered threads, a minimum of five threads must be engaged. Plug and seal the unused conduit connection with the provided conduit plug. Rosemount 975...

  • Page 22: Install The Protective Cover

    When installing the stainless steel protective cover, the same installation instructions apply. 2.7  Aim the detector Aim the detector toward the center of the detection zone and make sure you have a completely unobstructed view of the protected area. Emerson.com...

  • Page 23: Changing Default Detector Settings

    Alarm delay • Accessory relay options • Alarm latch • Field of view integrity indication Refer to the Rosemount 975 Flame Detectors Modbus Manager Manual or the Rosemount 975 Flame Detectors HART Manual for instructions on changing these settings. Rosemount 975...
  • Page 24 Installation Manual September 2023 00809-1400-4975 Emerson.com...

  • Page 25: Chapter 3 Operation

    4 mA (for models featuring analog [voltage] output, this will be 2 V). 3.2  Test flame detectors You can use the Rosemount flame simulators to test the Rosemount 975 flame detectors. You can also use the manual built-in text (BIT) to test the flame detectors. Table 3-1: Flame simulator compatibility...
  • Page 26 Operation Manual September 2023 00809-1400-4975 (continued) Table 3-2: Flame simulator Reference Manuals Rosemount flame simulator Reference Manual FS-UVIR-975 00809-0800-4975 Related information Power up the detector Emerson.com...

  • Page 27: Chapter 4 Initial Setup

    Initial setup 4.1  Continuous feature test The detector is supplied with default settings, including a continuous feature test. To change these settings, refer to the Rosemount 975 Flame Detectors Modbus Manager ® Manual. During normal operation, the detector tests itself continuously and indicates a fault if a failure is found.
  • Page 28 Manual BIT You can initiate manual BIT using the Modbus Manager or HART communicator or by connecting terminal 3 to ground. You can also use the Modbus Manager or HART communicator to configure the manual BIT's alarm duration. Emerson.com...

  • Page 29: Chapter 5 Maintenance

    2. Wipe the detector housing with clean water and a damp cloth. NOTICE Do not use a brush or sharp tools. 3. Identify where dust, dirt, or moisture accumulates on the detector window. a) Clean with a soft optical cloth. b) Rinse with clean water. Rosemount 975...
  • Page 30 Maintenance Manual September 2023 00809-1400-4975 Emerson.com...

  • Page 31: Chapter 6 Troubleshooting

    Light-emitting diode (LED) flashes yellow at 4 Hz, relay is open, 0-20 mA shows 2 mA Potential cause Built-in test (BIT) fault. Recommended action Ensure the detector window and reflector mirror are clean. Potential cause Faulty detector. Recommended action Re-power the detector. Rosemount 975...

  • Page 32: Light-Emitting Diode (Led) Constantly Red, Alarm Relay Energized, 0-20 Ma Indicates Alarm

    No HART is available at 0 mA level. Recommended action For Fault mode, the default indication is 1 mA. Configure this to 0 mA. Emerson does not recommend this when using a HART connection in order to preserve the HART communication. Emerson.com...

  • Page 33: Chapter 7 Specifications

    Rosemount 975UR IR: 4.3 – 4.8μm Detection range per fuel (ft./m) Note The ranges shown are at highest sensitivity setting for 1 ft (0.1 m ) pan fire. Table 7-1: Rosemount 975 Models Fuel Rosemount Rosemount Rosemount Rosemount 975MR 975HR...
  • Page 34 207 ft. (63 m) 70 ft (21 m) Battery 279 ft. (85 m) 75 ft (23 m) Contact Emerson representative for guidance on detecting magnesium alloy. One battery cell. Standard response time Table 7-2: Rosemount 975 Models Rosemount 975MR Rosemount 975HR...

  • Page 35: Electrical Specifications

    Manual Specifications 00809-1400-4975 September 2023 Table 7-5: Rosemount 975 Models Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR Six ranges: Three ranges: • 10 ft. (3 m) • 10 ft. (3 m) • 50 ft (15 m) • 50 ft (15 m) •...

  • Page 36: Mechanical Specifications

    °F (35 °C). The detector stops heating the window when the temperature is 15 °C above the start temperature. 7.3  Mechanical specifications Enclosure options Stainless steel 316 with electropolish finish Heavy duty copper free aluminum (less than one percent), polyurethane painted Emerson.com...
  • Page 37 4 in (100.6 mm) x 4.6 in. (117 mm) x 6.18 in (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 (1.13 kg) Environmental standards DNV 2-4 Water and dust IP66 and IP68 per EN 60529 Rosemount 975...
  • Page 38 Specifications Manual September 2023 00809-1400-4975 Emerson.com...

  • Page 39: Appendix A Reference Data

    Reference data A.1  Ordering information, specifications, dimensional drawings, and installation drawings To view current Rosemount 975 Series ordering information, specifications, and dimensional drawings, follow these steps: Procedure 1. Go to Emerson.com/en-us/catalog/flame-detectors. 2. Select the appropriate product. 3. Scroll down to Documents and Drawings.
  • Page 40 Reference data Manual September 2023 00809-1400-4975 Emerson.com...
  • Page 41 Manual FM fuel test responses 00809-1400-4975 September 2023 B  FM fuel test responses Results of the FM fuel tests are as follows: Table B-1: Rosemount 975 Models Fuel Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR Gasoline 300 (90) 93 (28)
  • Page 42 FM fuel test responses Manual September 2023 00809-1400-4975 Emerson.com...
  • Page 43 >1 ft (0.3 m) Match, wood, stick, including flare up >20 ft (6 m) >10 ft (3 m) >7 ft (2 m) >7 ft (2 m) Vehicle exhaust diesel fume For Rosemount 975MR only Table C-2: Welding immunity distance Level Range Distance >10 ft (3 m) >1.6 ft (0.5 m) Rosemount 975...
  • Page 44 750 W 1000 W 10 ft (3 m) >13 ft (4 m) >15 ft (4.5 m) >6 ft (2 m) >8 ft (2.5 m) 50 ft (15 m) >43 ft (13 m) >50 ft (15 m) >15 ft (4.5 m) >16 ft (5 m) 93 ft (28 m) >66 ft (20 m) >70 ft (21 m) >27 ft (8 m) >30 ft (9 m) Emerson.com...
  • Page 45 Manual 00809-1400-4975 September 2023 Rosemount 975...
  • Page 46 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 of their respective owners.

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Rosemount 975mrRosemount 975hrRosemount 975ufRosemount 975ur

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