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Reference Manual

00809-1400-4975, Rev AB

February 2022

Rosemount

™

975

Flame Detectors

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Summary of Contents for Rosemount 975 Series

Page 1: ...Reference Manual 00809 1400 4975 Rev AB February 2022 Rosemount 975 Flame Detectors ...

Page 2: ...chase price of the defective portion of the Goods Services All replacements or repairs necessitated by inadequate maintenance normal 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...

Page 3: ... opened in the factory Opening the electronic component side invalidates the warranty Only access the wiring compartment to wire or remove the detector or access RS 485 terminals for maintenance Technical support To get technical support for this product contact your local Emerson representative or the Emerson Technical Support department at 1 866 347 3427 or safety csc emerson com Abbreviations a...

Page 4: ...FPA National Fire Protection Association NPT National pipe thread RS485 Communication protocol allowing bi directional communication PN Part number SIL Safety integrity level UNC Unified coarse thread Vac Volts alternating current Vdc Volts direct current 4 ...

Page 5: ...tenance records 27 5 2 Clean the detector 27 Chapter 6 Troubleshooting 29 6 1 Light emitting diode LED is off fault relay is open 0 20 mA shows 0 mA analog voltage output is 0 V 29 6 2 Light emitting diode LED flashes yellow at 4 Hz fault relay is open 0 20 mA shows 1 mA 29 6 3 Light emitting diode LED flashes yellow at 4 Hz relay is open 0 20 mA shows 2 mA 29 6 4 Light emitting diode LED constant...

Page 6: ...uct certifications and installation drawings 37 Appendix B FM fuel test responses 39 Appendix C Immunity to false alarm sources 41 Contents Reference Manual February 2022 00809 1400 4975 6 Emerson com Rosemount ...

Page 7: ...n alarm or automatic extinguishing system The Rosemount 975 series comprises the following detectors Rosemount 975MR The Rosemount 975MR an ultra fast multispectrum triple infrared IR3 flame detector provides superior longest distance detection of hydrocarbon fires at up to 295 3 ft 90 m exceptional ultra fast detection in under 50 msec and unparalleled reliability The Rosemount 975MR is based on ...

Page 8: ... 30 Vdc Over voltage category 2 Relative humidity Non condensing relative humidity up to 100 NOTICE If the product is used outside of specified limits this voids the product certification and Emerson is not responsible for any incurred warranty expense NOTICE Do not open this product except for the terminal compartment as listed in this document under any circumstances NOTICE The device is not fie...

Page 9: ...on the same power line To fully comply with EMC directive and protect against interference caused by RFI and EMI the cable to the detector must be shielded and the detector must be grounded The shield should be grounded at the detector end Spacing and location The number of detectors and their locations in the protected area are determined by Size of the protected area Sensitivity of the detectors...

Page 10: ...y screw Hex key 6 mm Adjust the tilt mount Hex key 10 mm Affix the detector to the tilt mount Hex key in Attach protective cover to detector Flat screwdriver 6 mm Connect ground terminal Flat screwdriver 2 5 mm Connect wires to the terminal blocks Hex key in Stop plug 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 9...

Page 11: ...2 2 Vertical field of view for Rosemount 975MR 975UF and 975UR 50 down 45 up Gasoline For Rosemount 975HR Horizontal 80 Vertical 80 Reference Manual Installation 00809 1400 4975 February 2022 Rosemount 975 11 ...

Page 12: ...horizontal field of view for gasoline Hydrogen For Rosemount 975HR Horizontal 90 Vertical 90 Figure 2 4 Horizontal field of view for hydrogen Installation Reference Manual February 2022 00809 1400 4975 12 Emerson com Rosemount ...

Page 13: ...ach detector to tilt mount Procedure 1 Unpack the detector 2 Insert location pins on the tilt mount into the openings on detector housing 3 Thread the holding screw and tighten it Reference Manual Installation 00809 1400 4975 February 2022 Rosemount 975 13 ...

Page 14: ...the tilt mount The detector is now correctly located aligned and ready to be connected to the system 2 4 Open the back cover WARNING Do not open the housing while the power is on Procedure 1 Loosen the back cover security screw 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 Installation Referen...

Page 15: ...roper 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 6 Terminal box Reference Manual Installation 00809 1400 4975 February 2022 Rosemount 975 15 ...

Page 16: ...ay normally open T8 Alarm relay T9 Alarm relay normally closed T10 0 20 mA T11 0 20 mA T12 Alarm output T13 RS485 T14 RS485 T15 Accessory relay normally open T16 Accessory relay T17 Accessory relay normally closed 2 Use Figure 2 7 Figure 2 8 Figure 2 9 and Figure 2 10 for typical wiring configurations Installation Reference Manual February 2022 00809 1400 4975 16 Emerson com Rosemount ...

Page 17: ...tector C Second detector D Last detector E Power supply F Alarm loop G End of line Figure 2 8 Non isolated sink three wires A Detector B Controller C Input power 18 to 32 Vdc D Return E 0 20 mA meter Reference Manual Installation 00809 1400 4975 February 2022 Rosemount 975 17 ...

Page 18: ... D Return E 0 20 mA meter Note For additional configuration options please refer to the Rosemount 975 Flame Detectors Modbus Manager Manual 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 Installation Reference Manual February 2022 00809 1400 4975 18 Emerson com Rosemount ...

Page 19: ...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 the cable to the detector and ground the detector Ground the shield at the detector end 2 6 Install the protective cover CAUTION Always install the protective cover with the det...

Page 20: ...ve 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 recommends positioning the detector tilted down at a 45 angle to maximize coverage and prevent accumulation of dust and dirt Do not begin installation until all conceivable considerations ...

Page 21: ...s Modbus Manager settings Sensitivity Response time Heated optics functionality 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 Reference Manual Installation 00809 1400 4975 February 2022 Rosemount 975 21 ...

Page 22: ...Installation Reference Manual February 2022 00809 1400 4975 22 Emerson com Rosemount ...

Page 23: ...rs 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 Rosemount flame simulator model Rosemount 975 flame detector model FS HR 975 Rosemount 975HR FS IR 975 Rosemount 975MR FS UVIR 975 Rosemount 975UF and 975UR To test a flame detector Procedure 1 Powe...

Page 24: ...osemount flame simulator Reference Manual FS HR 975 00809 0900 4975 FS IR 975 00809 0500 4975 FS UVIR 4975 00809 0800 4975 Related information Power up the detector Operation Reference Manual February 2022 00809 1400 4975 24 Emerson com Rosemount ...

Page 25: ...nsor circuitry for noise or disconnection in the electronic circuitry 0 20 mA level output Relays and heater operation Processor watch dog Software Memory Oscillator frequency 4 2 Response to fault indication If a failure is found the detector indicates by Light emitting diode LED yellow flashes 4 Hz Fault relay opens 0 20 mA 1 mA default Analog voltage output 0 V output The fault indications rema...

Page 26: ...s not activate any indicator If required you can modify the automatic BIT interval using the RS 485 Modbus Manager or HART communicator In case of a BIT fault this sequence continues until a successful BIT occurs when the detector resumes normal operation As the result of a successful automatic manual BIT the fault relay remains energized As the result of an unsuccessful automatic manual BIT which...

Page 27: ...rom the flame detector 2 Wipe the detector housing with clean water and a damp cloth NOTICE Do not use a brush or sharp tools to clean the device Brushes or sharp tools may scratch the detector window 3 Identify where dust dirt or moisture accumulates on the detector window a Clean with a soft optical cloth b Rinse with clean water Reference Manual Maintenance 00809 1400 4975 February 2022 Rosemou...

Page 28: ...Maintenance Reference Manual February 2022 00809 1400 4975 28 Emerson com Rosemount ...

Page 29: ...flashes yellow at 4 Hz fault relay is open 0 20 mA shows 1 mA Potential cause Low voltage Recommended action Check that the operating voltage is correct according to Electrical specifications Potential cause Faulty detector Recommended action Re power the detector 6 3 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 Recommende...

Page 30: ... the alarm latch is not enabled in the detector settings Potential cause Faulty detector Recommended action Re power the detector 6 5 No HART communication 0 20 mA shows 0 mA Potential 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 c...

Page 31: ...nt 975HR Rosemount 975UF Rosemount 975UR Gasoline 300 ft 90 m 93 ft 28 m N Heptane 300 ft 90 m 93 ft 28 m Diesel fuel 207 ft 63 m 70 ft 21 m Kerosene 207 ft 63 m 70 ft 21 m Alcohol 95 185 ft 55 m 57 ft 17 m Isopropyl alcohol IPA 185 ft 55 m 70 ft 21 m Methanol 185 ft 55 m 57 ft 17 m Methane 207 ft 63 m 60 ft 18 m Liquified petroleum gas LPG 207 ft 63 m 60 ft 18 m Polypropylene 160 ft 49 m 60 ft 18...

Page 32: ...ting magnesium alloy 2 One battery cell Standard response time Table 7 2 Rosemount 975 Models Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR Typically 2 sec at 131 ft 40 m 10 sec at 300 ft 90 m Typically 5 sec at 93 ft 28 m Ultra fast response time Table 7 3 Rosemount 975 Models Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR Typically 1 sec at 100 ft 30 m 20 msec ...

Page 33: ...ertical 95 Other fuels Horizontal 80 Vertical 80 Temperature range operating and storage Table 7 7 Rosemount 975 Models Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR 76 F 60 C to 185 F 85 C Humidity Non condensing relative humidity up to 100 percent 7 2 Electrical specifications The electrical specifications apply to all models unless stated otherwise Operating voltage 24 Vdc nom...

Page 34: ...window can be heated to improve performance in ice condensation and snow conditions The heater increases the temperature of the optical surface by 5 C to 25 C above the ambient temperature 1 The heated optics can be configured in three ways Off Optics are not heated On Optics are continuously heated Auto default Operated only when the change of temperature requires the heating Note In Auto mode th...

Page 35: ...m 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 Reference Manual Specifications 00809 1400 4975 February 2022 Rosemount 975 35 ...

Page 36: ...Specifications Reference Manual February 2022 00809 1400 4975 36 Emerson com Rosemount ...

Page 37: ...nd Drawings 4 Select DATA SHEETS BULLETINS 5 Select the appropriate Product Data Sheet A 2 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 Select the appropriate product 3 Scroll down to Documents and Drawings 4 Select CERTIFICATES ...

Page 38: ...Reference data Reference Manual February 2022 00809 1400 4975 38 Emerson com Rosemount ...

Page 39: ...etroleum gas LPG 1 207 ft 63 m 59 ft 18 m Polypropylene 1 161 ft 49 m 59 ft 18 m Paper 1 112 ft 34 m 33 ft 10 m Hydrogen 1 N A 164 ft 50 m 69 ft 21 m N A Magnesium alloy 3 N A 33 ft 10 m Gun powder 4 197 ft 60 m 66 ft 20 m 92 ft 28 m Fireworks 5 33 ft 10 m 10 ft 3 m Cooking oil 1 207 ft 63 m 69 ft 21 m Mineral oil 20 w 50 1 207 ft 63 m 69 ft 21 m Wood 1 112 ft 34 m 33 ft 10 m Ethylene glycol 1 164...

Page 40: ...07 ft 63 m 69 ft 21 m Battery 6 279 ft 85 m 76 ft 23 m 1 1 ft2 0 1 m2 pan fire 2 Plume fire 2 5 ft 0 75 m high 0 8 ft 0 25 m wide 3 Only for ultraviolet UV detector 4 1 5 in2 10 cm2 pan fire 5 Ten pieces per test 6 One battery cell FM fuel test responses Reference Manual February 2022 00809 1400 4975 40 Emerson com Rosemount ...

Page 41: ...IAD IAD IAD Bright colored clothing including red and safety orange IAD IAD IAD IAD Electronic flash 180 W seconds minimum output IAD IAD IAD IAD Movie light 625 W quartz DWY lamp Sylvania S G 55 or equivalent 6 5 ft 2 m 6 5 ft 2 m 13 ft 4 m 3 ft 1 m Blue green dome light conforming to M251073 IAD IAD IAD IAD Flashlight MX 991 U IAD IAD IAD IAD Radiation heater 3000 W 3 ft 1 m 3 ft 1 m IAD IAD Rad...

Page 42: ...3 Halogen immunity distance Sensitivity level Detection range Halogen distance Rosemount 975975UF Rosemount 975975UR 750 W 1000 W 750 W 1000 W 1 10 ft 3 m 13 ft 4 m 15 ft 4 5 m 6 ft 2 m 8 ft 2 5 m 2 50 ft 15 m 43 ft 13 m 50 ft 15 m 15 ft 4 5 m 16 ft 5 m 3 93 ft 28 m 66 ft 20 m 70 ft 21 m 27 ft 8 m 30 ft 9 m Immunity to false alarm sources Reference Manual February 2022 00809 1400 4975 42 Emerson c...

Page 43: ...Reference Manual 00809 1400 4975 February 2022 Rosemount 975 43 ...

Page 44: ...ll 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 of their respective owners ...

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