Page 1
Manual MS-00809-0100-4965, Rev AC March 2025 Rosemount ™ 965 Flame Detector...
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
NOTICE Disconnect external devices, such as fire alarms and automatic extinguishing systems, before performing maintenance. Do not expose the detector to radiation of any kind unless required for testing purposes. Do not open the electronic compartment. Keep this part closed at all times. It can only be opened at the factory. Opening the electronic component side invalidates the warranty.
1 Introduction 1.1 Product overview The Rosemount 965 Flame Detector detects hydrocarbon fires at up to 150 ft. (45 m) with unparalleled reliability. The 965 is based on QuadSense triple-infrared (IR3) technology, ™ ensuring the highest sensitivity and proven immunity to false alarm sources.
Page 8
Introduction Manual March 2025 MS-00809-0100-4965 www.Emerson.com...
Manual Installation MS-00809-0100-4965 March 2025 2 Installation 2.1 Field of view Figure 2-1: Horizontal Field of View A. Relative range www.Emerson.com...
Page 10
Installation Manual March 2025 MS-00809-0100-4965 Figure 2-2: Vertical Field of View A. Relative range www.Emerson.com...
Manual Installation MS-00809-0100-4965 March 2025 2.2 Tilt mount Figure 2-3: Tilt Mount A. Clamp locking screw B. Horizontal/vertical locking screw C. Rotating clamp D. Tilt holding plate Figure 2-4: Tilt Mount Photo www.Emerson.com...
Changing default detector settings You can modify the following settings using the Modbus Manager or HART ® ® communication. • Built-in test (BIT) • Detection options • Lock option • 4-20 mA settings • Sensitivity • Alarm delay • Alarm latch www.Emerson.com...
After you press the trigger, there will be an initial 2 second delay. Then the equipment will operate for a maximum of 60 seconds. After that, it will not be able to operate for a minimum of 30 seconds. www.Emerson.com...
Page 14
Operation Manual March 2025 MS-00809-0100-4965 Postrequisites For full instructions on testing with a flame simulator, see the Rosemount FS-IR-975 Reference Manual. www.Emerson.com...
Continuous feature test The detector is supplied with default settings, including a continuous feature test. To change these settings refer to the Rosemount 965 Flame Detector Modbus Manager Manual. During normal operation, the detector tests itself continuously and indicates a fault if a failure is found.
Page 16
As the result of an unsuccessful automatic/manual BIT (which occurs after three failures), the fault relay de-energizes. Manual BIT You can initiate manual BIT using the Modbus Manager or HART communicator. You can also use the Modbus Manager or HART communicator to configure the manual BIT's alarm duration. www.Emerson.com...
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. www.Emerson.com...
Page 18
Maintenance Manual March 2025 MS-00809-0100-4965 www.Emerson.com...
Re-power the detector. Related information Specifications 6.3 Light-emitting diode (LED) flashes amber 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. www.Emerson.com...
No HART is available at 0 mA level. Recommended action For Fault mode, the default indication is . Configure this to 1 mA 0 mA Emerson does not recommend this when using a HART connection in order to preserve HART communication. www.Emerson.com...
30-inch (0.75 m) high, 10-inch (0.25 m) wide plume fire 1.5 x 1.5-inch (3.8 x 3.8 cm) wide, 4-inch (10 cm) tall Table 7-2: General Specifications Spectral response 4 infrared (IR) bands between 4 μm and 5 μm Detection response time Typically < 5 seconds www.Emerson.com...
Page 22
RS-485 RS-485 Modbus -compatible communication link that can be used ® in computer-controlled installations This output is configurable. Table 7-6: Mechanical Specifications Enclosure options Low-copper aluminum polyurethane painted www.Emerson.com...
March 2025 A Reference data A.1 Ordering information, specifications, and drawings To view current ordering information, specifications, and drawings: Procedure See the Rosemount 965 Product Data Sheet. A.2 Product certifications To view product certifications: Procedure See Rosemount 965 Product Certifications. www.Emerson.com...
Page 26
Reference data Manual March 2025 MS-00809-0100-4965 www.Emerson.com...
> 1.6 ft. (0.5 m) 33 ft. (10 m) > 6 ft. (2 m) 67 ft. (20 m) > 12 ft. (4 m) 100 ft. (30 m) > 17 ft. (6 m) 150 ft. (45 m) > 25 ft. (7.5 m) www.Emerson.com...
Page 28
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.
Need help?
Do you have a question about the Rosemount 965 and is the answer not in the manual?
Questions and answers