Related Manuals for Emerson Rosemount 925FGD
Summary of Contents for Emerson Rosemount 925FGD
- Page 1 Manual 00809-0100-4925, Rev AB March 2023 Rosemount ™ 925FGD Fixed Gas Detector Integrated Gas Detection...
- Page 2 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 Rosemount nuclear-qualified products, contact an Emerson sales representative.
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Page 3: Table Of Contents
Notifications, faults, and diagnostics...................43 6.1 Transmitter electronics failure....................43 6.2 Transmitter power supply low....................43 6.3 Transmitter analog output failure...................43 6.4 Sensor incompatible......................... 44 6.5 Transmitter software fault....................... 44 6.6 Transmitter temperature high....................44 6.7 Transmitter temperature low....................44 6.8 Transmitter power supply high....................45 6.9 Transmitter display board failure....................45 Rosemount 925FGD... - Page 4 6.19 Sensor fault not defined......................48 6.20 Sensor fault..........................48 6.21 Sensor weak signal......................... 48 6.22 Replace sensor soon....................... 49 6.23 Undefined sensor warning....................49 Appendix A Specifications...........................51 Appendix B Product certifications......................53 B.1 Reliability............................ 53 B.2 Global hazardous area and performance................53 Appendix C Spare parts..........................55 Emerson.com/Rosemount...
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Page 5: Chapter 1 Introduction
1.1 Using this manual The sections in this manual provide information on installing, operating, and maintaining the Rosemount 925FGD Fixed Gas Detector. The manual sections are organized as follows: Configuration contains information on the factory default and configurable settings for the detector. -
Page 6: Device Overview
00809-0100-4925 1.3 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 Rosemount 925FGD with or without the sensor module for instances where sensor modules will be installed after the initial transmitter installation. -
Page 7: Chapter 2 Configuration
2.2 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 8 Do not attempt to clean the IP filter. Do not rinse or spray the IP filter with water. Do not immerse the IP filter in water. IP ratings does not imply that the equipment will detect gas during and after exposure to those conditions. Emerson.com/Rosemount...
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Page 9: Chapter 3 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 10: Mounting
12 months, if the installation site is subject to more frequent swings in environment conditions, the calibration interval should be decreased accordingly. 3.3 Mounting The Rosemount 925FGD Gas Transmitter must be mounted with the sensor directly attached to the transmitter as in Figure 3-1. You can also mount the transmitter either on the surface or on a pole. -
Page 11: Wiring
The 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: Rosemount 925FGD... - Page 12 Ground wire from 625 sensor must be connected to ground inside of 925 transmitter housing. Isolated 4-wire loop wiring For a 4-wire loop setup, ensure the loop jumper is set to the ISOLATE position and that shielded, twisted pairs are used. Emerson.com/Rosemount...
- Page 13 Figure 3-6: Non-isolated 3-wire wiring diagram A. Power supply (18-30 Vdc) B. 200 ≤ RL ≤ 800 C. Power/4-20 mA analog loop terminals D. HART modem Wiring to Emerson Wireless 775 THUM adapter Refer to Figure 3-7 for wiring instructions. Rosemount 925FGD...
- Page 14 A. Power supply (18-30 Vdc) B. 200 ≤ RL ≤ 800 C. Power/4-20 mA analog loop terminals D. Emerson Wireless 775 THUM adapter 3.4.3 Remote reset If the alarm relays are configured for latching operation, you may want to reset latched alarms from a remote location.
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Page 15: Local Operator Interface (Loi)
When a transmitter is in fault mode, take immediate action to determine the source and correct the fault condition. Emerson 925 transmitters and 625 sensors continually check for situations that may prevent the transmitter and sensor from providing an expected response to ambient conditions and records these as a fault condition in the event log and the output(s) of the transmitter. - Page 16 Installation Manual March 2023 00809-0100-4925 For more information on this safety feature, refer to the Rosemount 925FGD Safety Manual. 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.
- Page 17 Manual Installation 00809-0100-4925 March 2023 Figure 3-9: LOI Menu Tree Sheet 1 Rosemount 925FGD...
- Page 18 Installation Manual March 2023 00809-0100-4925 Figure 3-10: LOI Menu Tree Sheet 2 Emerson.com/Rosemount...
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Page 19: Hart ® Communication
Device Description web page for your handheld communicator. Refer to your handheld communicator's reference manual for a menu structure with descriptions of each option. Prior to making any changes to the Rosemount 925FGD Fixed Gas Detector, such as changing the configuration or replacing the sensor, take appropriate action to avoid a false trip by electronically bypassing the safety Programmable Logic Controller (PLC). - Page 20 A. If there are no alerts active, then Device Status is Good. Otherwise, the Device Status is one of the following: Failure, Function Check, Out of Specification, or Maintenance Required. B. Communication Status is Polled initially. If Burst Message is enabled, Communication Status will show Burst. Emerson.com/Rosemount...
- Page 21 Manual Installation 00809-0100-4925 March 2023 Figure 3-13: HART Menu Tree, Sheet 2 Rosemount 925FGD...
- Page 22 Installation Manual March 2023 00809-0100-4925 Figure 3-14: HART Menu Tree, Sheet 3 A. Selected Gas and Sensor Upper Range are only writable if an infrared (IR) or electrochemical sensor is selected. Emerson.com/Rosemount...
- Page 23 Manual Installation 00809-0100-4925 March 2023 Figure 3-15: HART Menu Tree, Sheet 4 Rosemount 925FGD...
- Page 24 A. View Message 1 Configuration menu will be visible only when Message 1 is Enabled. B. Trigger Level will not be visible of the Trigger Mode is Continuous or On-Change. C. Default Update Rate will not be visible if Trigger Mode is Continuous. Emerson.com/Rosemount...
- Page 25 D. View Message 3 Configuration menu will be visible only when Message 3 is Enabled. E. Trigger Level will not be visible of the Trigger Mode is Continuous or On-Change. F. Default Update Rate will not be visible if Trigger Mode is Continuous. Rosemount 925FGD...
- Page 26 Installation Manual March 2023 00809-0100-4925 Figure 3-18: HART Menu Tree, Sheet 7 Emerson.com/Rosemount...
- Page 27 C. If there are no alerts active, No Active Alerts is shown. Otherwise, a combination of the Failure, Function Check, Out of specification, or Maintenance Required alerts are shown depending on the active alerts. D. Methods are used to display the text related to the alert if it is longer than 19 characters. Rosemount 925FGD...
- Page 28 Installation Manual March 2023 00809-0100-4925 Figure 3-20: HART Menu Tree, Sheet 9 Emerson.com/Rosemount...
- Page 29 Alarm 1 relay activation mode Normally closed/Normally open Alarm 2 relay activation mode Normally closed/Normally open Gas type Methane, Propane, Butane, Ethane, Ethylene Range 1(0-100) LEL standard ISO/IEC, NFPA Passcode 0000 to 9999 Heater setting Disabled, Automatic Backlight setting Disabled, Enabled, Automatic Rosemount 925FGD...
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Page 30: Power On And Start-Up
During this start-up process, the display will show a progress bar as well as the firmware versions for all components of the Rosemount 925FGD system. The status indicator LEDs will cycle through all colors: green, amber, and red. - Page 31 Figure 3-25: 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 32 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 resistor between the analog output terminals. Figure 3-26: Current Loop Fault Screen Emerson.com/Rosemount...
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Page 33: Chapter 4 Sensor Calibration
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 34 Calibration using the IP filter may require higher volumes, pressures, and/or flow rates of calibration gas. NOTICE A new calibration is required following changes to any of the below settings: 1. Gas type 2. LEL standard 3. Span gas concentration Emerson.com/Rosemount...
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Page 35: Calibration Instructions
If inconsistent calibration gas concentrations are measured during calibration, or if the calibration gas flow is sporadically stopped, the calibration attempt will fail and be rejected. Note Calibration attempts using the IP filter attachment in high wind environments may not create the required stability and may be rejected. Rosemount 925FGD... - Page 36 Sensor calibration Manual March 2023 00809-0100-4925 Note If any calibration attempt is rejected or aborted, the sensor will defer to to the most recent calibration information stored in memory. Emerson.com/Rosemount...
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Page 37: Operation And Maintenance
Status indication LEDs are installed on the local operator interface (LOI), located behind the check mark, up arrow, and down arrow characters. Table 5-1: Status Indication LEDs Color Style Detector operation mode Green Alternating 3 seconds On, 1 Normal mode second Off Amber Solid On Warning or Fault mode Rosemount 925FGD... - Page 38 2.5 mA, 4-20 text: "varies base mA if alarm is on fault" active Required user action text: "varies base on fault" Sensor 3.0 mA Not changed Not changed Not changed Message text: Amber calibration "varies based on calibration status" Emerson.com/Rosemount...
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Page 39: Proof Tests
This feature can be found in the Transmitter Settings section of the LOI menu or via HART communication. ® Provide calibration gas to the sensor for approximately two seconds or until the primary variable displays a gas concentration equal to concentration of the calibration gas, within the acceptable accuracy tolerances. Rosemount 925FGD... -
Page 40: Replace Sensor
March 2023 00809-0100-4925 5.3 Replace sensor To replace the Rosemount 625ND Non-dispersive Infrared Combustible Module, refer to the latest Rosemount 925FGD Product Data Sheet for configured model number and ordering information. 5.3.1 Replace Rosemount 625ND Non-dispersive Infrared Combustible Gas Sensor Module... -
Page 41: Replace Complete Transmitter Electronics Assembly
The transmitter electronics assembly part number is 92511E4TE. Figure 5-2: Rosemount 92511E4TE 5.5 Replace transmitter LOI screen and display board The part number of the Rosemount 925 transmitter display board, which includes the LOI screen and IR buttons, is 00925-3201-0001. Figure 5-3: 00925-3201-0001 Rosemount 925FGD... -
Page 42: Event Logs
5.8 Service support For technical support, contact your Emerson representative or email safety.csc@emerson.com. The Response Center will ask for product model and serial numbers and will provide a Return Material Authorization (RMA) number. -
Page 43: Notifications, Faults, And Diagnostics
Required user action text Potential cause The current loop readback error is larger than two percent of span. Recommended actions 1. Power cycle. 2. Verify analog output connection and 3-wire or 4-wire jumper position. 3. If issue persists, replace transmitter module. Rosemount 925FGD... -
Page 44: Sensor Incompatible
Recommended actions 1. Lower ambient temperature. 2. If the condition persists, replace the transmitter module. 6.7 Transmitter temperature low Icon Transmitter warning Transmitter temperature low Active alert message text Potential cause Temperature is below the device minimum operating temperature. Emerson.com/Rosemount... -
Page 45: Transmitter Power Supply High
Fault message text Sensor initializing Potential cause The sensor is initializing. Recommended action Allow sensor to finish performing its initialization sequence. 6.11 Sensor not calibrated Sensor fault Icon Sensor not calibrated Fault message text Required user action text Calibrate sensor. Rosemount 925FGD... -
Page 46: Sensor Negative Drift
Fault message text Sensor temperature high Verify operation range. Required user action text Potential cause Temperature is above the sensor's maximum operating temperature. Recommended actions 1. Lower ambient temperature for sensor. 2. If the condition persists, replace the sensor electronics. Emerson.com/Rosemount... -
Page 47: Sensor Temperature Low
Supply voltage to the sensor is lower than the sensor's minimum operating voltage. Recommended actions 1. Verify supply voltage to sensor. 2. If the condition persists, replace the sensor electronics. 6.18 Sensor environmental fault Sensor fault Icon Sensor environmental fault Fault message text Required user action text Verify operation range. Rosemount 925FGD... -
Page 48: Sensor Fault Not Defined
2. If the condition persists, replace the transmitter module. 6.21 Sensor weak signal Sensor warning Icon Active alert text Sensor weak signal Potential cause Sensor signal is weak. Recommended actions 1. Verify calibration gas and re-calibrate sensor. 2. If issue persists, replace sensor module. Emerson.com/Rosemount... -
Page 49: Replace Sensor Soon
Replace the sensor in the near future. 6.23 Undefined sensor warning Icon Sensor warning Undefined sensor warning Active alert text Potential cause Undefined sensor status detected. Recommended actions 1. Power cycle. 2. If issue persists, replace sensor module. Rosemount 925FGD... - Page 50 Notifications, faults, and diagnostics Manual March 2023 00809-0100-4925 Emerson.com/Rosemount...
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Page 51: Appendix A Specifications
Manual Specifications 00809-0100-4925 March 2023 A Specifications For the most recent specifications, refer to the Rosemount 925FGD Product Data Sheet. Rosemount 925FGD... - Page 52 Specifications Manual March 2023 00809-0100-4925 Emerson.com/Rosemount...
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Page 53: Appendix B Product Certifications
Manual Product certifications 00809-0100-4925 March 2023 B Product certifications B.1 Reliability Certified SIL2 per IEC 61508. B.2 Global hazardous area and performance For the most recent information, please refer to the Rosemount 925FGD Quick Start Guide. Rosemount 925FGD... - Page 54 Product certifications Manual March 2023 00809-0100-4925 Emerson.com/Rosemount...
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Page 55: Appendix C Spare Parts
U-Bolt for 925 Transmitter Pole Mount (Set of 2) 00925-9100-0015 Gas Calibration Kit, 0.5 LPM SST Regulator, with Cal Cup 00628-9000-0001 Spare, ingress protection filter assembly for 625ND and 628 SSK-51 Sunshade assembly, 1-in. pipe SSK-52 Sunshade assembly, 2-in. pipe SSK-53 Sunshade assembly, 3-in. pipe Rosemount 925FGD... - Page 56 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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Questions and answers
Wath signifed when you give gaz span the stoped and not contenus to 100? Afeter calibration it give as found 52! Not 100
If the Emerson Rosemount 925FGD gas span stops and does not continue to 100 after calibration, it may indicate an issue with calibration stability. Possible causes include inconsistent calibration gas concentrations, sporadic gas flow, or environmental factors such as high wind affecting the IP filter attachment. If the calibration attempt is rejected or aborted, the sensor will revert to the most recent stored calibration data.
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