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Summary of Contents for Emerson Rosemount 925FGD
- Page 1 Quick Start Guide 00825-0100-4925, Rev AC April 2023 Rosemount 925FGD Fixed Gas ™ Detector Integrated Gas Detection...
- Page 2 Refer to the Product Certification section of this Quick Start Guide for documentation. CAUTION For safety reasons this equipment must be operated and serviced by qualified personnel only. Read and understand the instruction manual completely before operating or servicing. Rosemount 925FGD...
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Page 3: Table Of Contents
The products described in this document are not designed for nuclear qualified applications. Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate readings. For information on nuclear-qualified products, contact an Emerson sales representative. Contents Device overview..........................5 Installation............................ - Page 4 Quick Start Guide April 2023 Rosemount 925FGD...
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Page 5: Device Overview
Quick Start Guide 1 Device overview The Rosemount 925FGD is a fixed gas detector compatible with the Rosemount 625 Sensor Module. The Rosemount 925FGD is a fully-assembled unit for only sensor- direct-mount installations. For this configuration, you can order the... -
Page 6: Installation
Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications. When connecting an external device to the Rosemount 925FGD's discrete output in a hazardous area, ensure that the external device is installed in accordance with Intrinsically Safe or non-incendive field wiring practices. - Page 7 April 2023 Quick Start Guide 2.2 Mounting The Rosemount 925FGD Gas Transmitter must be mounted with the sensor directly attached to the transmitter as in Figure 2-1. You can also mount the transmitter either on the surface or on a pole.
- Page 8 2450 kPa (356 psi). Seal all threads with an approved thread sealant, such as silicone or PTFE tape (if required). When attaching the cover; tighten at least one-third turn after the O-ring contacts the transmitter housing. The Rosemount 925FGD...
- Page 9 April 2023 Quick Start Guide transmitter cover must be fully engaged to meet explosion proof requirements Note Do not apply high voltage (e.g., AC line voltage) to the power or sensor terminals, since high voltage can damage the unit To wire the transmitter: Table 2-1: Sensor terminals Sensor terminals Sensor wires...
- Page 10 For a four-wire loop setup, ensure the loop jumper is set to the ISOLATE position and that shielded, twisted pairs are used. Figure 2-5: Isolated four-wire wiring diagram A. Power supply (18-30 VDC) B. 200 ≤ R ≤ 800 C. Power/4-20 mA analog loop terminals D. HART modem ® Rosemount 925FGD...
- Page 11 April 2023 Quick Start Guide Non-isolated three-wire loop wiring For a four-wire loop setup, ensure the loop jumper is set to the NON ISO position and that shielded, twisted pairs are used. Figure 2-6: Non-isolated three-wire wiring diagram A. Power supply (18-30 VDC) B.
- Page 12 For added safety, you can enable a four-digit passcode instead of the following standard unlock sequence. You can do this through the LOI or via HART ® For more information on this safety feature, refer to the Rosemount 925FGD Safety Manual. Rosemount 925FGD...
- Page 13 April 2023 Quick Start Guide Procedure 1. Press any IR button to initiate the unlock sequence. 2. Press the check mark. 3. Press the up arrow. 4. Press the check mark. 5. Press the down arrow. 2.6 Power on and start-up Once you have made all necessary wiring connections and applied power, the transmitter will power on.
- Page 14 When a new sensor module is detected, either upon initial installation or replacement of a sensor module, the configuration settings are shown on the LOI. At this point, you have the option of accepting configuration settings or selecting new settings. Figure 2-9: New Sensor Detected Screen Rosemount 925FGD...
- Page 15 April 2023 Quick Start Guide Following the configuration prompt, an additional prompt appears stating that a field calibration is recommended. Refer to Calibration options. Figure 2-10: Field Calibration Recommended screen Quick Start Guide...
- Page 16 Figure 2-11: Primary Variable Screen Using Methane Note If the operator removes and reapplies power to the transmitter without replacing the sensor module, and no faults are present upon start-up, the display will go directly to the Primary Variable screen following the Start-up screen. Rosemount 925FGD...
- Page 17 April 2023 Quick Start Guide Note If the 4-20 mA analog output has not been connected, a current loop failure fault will be present after the other prompts have been cleared. You can clear this fault either by terminating the 4-20 mA output to the appropriate control system input or by placing a 250 Ω...
- Page 18 (LOI), located behind the check mark, up arrow, and down arrow characters. Table 2-4: Status Indication LEDs Color Style Detector operation mode Green Alternating 3 seconds Normal mode On, 1 second Off Amber Solid On Warning or Fault mode Rosemount 925FGD...
- Page 19 April 2023 Quick Start Guide (continued) Table 2-4: Status Indication LEDs Color Style Detector operation mode Solid On Gas concentrations have reached Alarm 1 and/or Alarm 2 values. Table 2-5: Device outputs status conditions Status Current Fault Alarm 1 Alarm 2 Display Button Event...
- Page 20 3.0 mA Message Amber calibrati changed changed changed text: "varies based on calibration status" Under 2.0 mA Fault Icons: Amber range changed changed Sensor fault icon Fault message text: "Sensor negative drift" Required user action text: "Calibrate sensor" Rosemount 925FGD...
- Page 21 April 2023 Quick Start Guide (continued) Table 2-5: Device outputs status conditions Status Current Fault Alarm 1 Alarm 2 Display Button Event loop relay relay relay logged level output output output color Over 20.5 mA Icons: Amber range changed changed changed Sensor warning: Active alert...
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Page 22: Configuration
® 3.2 Configuration options To order the Rosemount 925FGD or replacement Rosemount 625ND Sensor Modules with custom configuration, select the C1 optional model code and add it to the configured model number. Additionally, submit a Configuration Data Sheet specifying the custom options required. - Page 23 April 2023 Quick Start Guide CAUTION The Ingress Protection (IP) filter must be installed. If the IP filter is not installed, damage may occur to the sensor. Type 4X/IP ratings are not valid if IP filter is not installed on 625. Do not operate the transmitter without the correct IP filter installed in the sensor module.
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Page 24: Sensor Calibration
1.35%/volume 1.15%/volume Note To order a Rosemount 925FGD with the optional ISO/IEC gas concentrations used for factory calibration, you must add the optional IEC model code to the configured model number. You can also change this in the field by selecting sensor settings in the local operator interface (LOI) menu or via HART communication. - Page 25 April 2023 Quick Start Guide Figure 4-1: Attaching Calibration Cup to Sensor The calibration cup creates a mostly sealed environment for the sensor, mitigating environmental effects such as wind and humidity. Leaving the calibration cup attached would render the sensor inoperable for detecting hazardous gases. NOTICE Remove the calibration cup after calibration.
- Page 26 5. Open the regulator and allow zero-gas to flow until prompted to stop. 6. Select Next on the LOI while applying zero gas to the sensor. 7. Once zero calibration is complete, disconnect the zero gas and attach the appropriate concentration of span gas. Rosemount 925FGD...
- Page 27 April 2023 Quick Start Guide 8. Select Next on the LOI to begin span calibration. 9. Open the regulator and allow span-gas to flow until prompted to stop. 10. Remove span gas when prompted on the LOI. After calibration is completed, the LOI shows Zero && Span Calibration Success.
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Page 28: Functional Specifications
All models: rated 18-32 VDC maximum, Electrical supply 1A maximum Intended for indoor/ outdoor use 925: -67 °F to +167 °F (-55 °C to +75 °C) Ambient temperature 905/625: -40 °F to +158 °F (-40 °C to +70 °C) Air velocity limits Rosemount 925FGD... - Page 29 April 2023 Quick Start Guide Quick Start Guide...
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Page 30: Product Certifications
B.4 Directive information A copy of the Declaration of Conformity can be found at the end of the Quick Start Guide. The most recent revision of the Declaration of Conformity can be found at Emerson.com/Rosemount. B.5 Response time Methane T50 ≤13.2 s T90 ≤... - Page 31 April 2023 Quick Start Guide B.6 Hazardous location certificates B.6.1 Rosemount 925FGD with 625ND Infrared Combustible Gas Sensor E5 USA CSA 70219958 Certificate UL 60079-0 7th edition, UL 60079-1, 7th edition, Standards FM3600: 2022, FM3615:2022, FM3611: 2021, ANSI/FM/UL 60079-29-1: 2019, UL50E 3rd edition, UL 121201 edition 9, UL/ANSI/ISA 61010-1 E.3...
- Page 32 2. Compliance to Ex dust ignition protection standards does not imply that the equipment will detect gas during and after exposure to dust and fibers in suspension in air. E7 International IECEx CSA 23.0003X Certificate IEC60079-0:2017, IEC60079-1:2014, IEC 60079-31:2022, Standards IEC60079-29-1:2016 Ex db IIC T5 Gb Markings Rosemount 925FGD...
- Page 33 April 2023 Quick Start Guide Ex tc IIIC T85°C Dc -40°C ≤ Tamb ≤ +75°C (625) -55°C ≤ Tamb ≤ +75°C (925) Special Conditions for Safe Use 1. Connect ONLY to approved SELV/PELV power supply. 2. Compliance to Ex dust ignition protection standards does not imply that the equipment will detect gas during and after exposure to dust and fibers in suspension in air.
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Page 34: Declaration Of Conformity
Quick Start Guide April 2023 C Declaration of Conformity Rosemount 925FGD... - Page 35 April 2023 Quick Start Guide Quick Start Guide...
- Page 36 2023 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 of their respective owners.
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