Emerson Rosemount 248 Reference Manual
Rail mount temperature transmitter with rk option and hart 7 protocol
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- Quick start manual (28 pages)
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Summary of Contents for Emerson Rosemount 248
- Page 1 Reference Manual 00809-0200-4825, Rev AC March 2022 ™ Rosemount 248 Rail Mount Temperature Transmitter ® with RK Option and HART 7 Protocol...
- Page 2 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. WARNING Failure to follow these installation guidelines could result in death or serious injury.
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Page 3: Table Of Contents
5.9 Electronics failure........................16 5.10 Electronics failure........................17 5.11 Power supply voltage issues.....................17 5.12 Loop current read back error....................17 5.13 Power supply voltage issues.....................17 5.14 Electronics failure........................17 5.15 Electronics failure........................18 5.16 Electronics failure........................18 5.17 Electronics failure........................18 Emerson.com/Rosemount... - Page 4 Contents Reference Manual March 2022 00809-0200-4825 5.18 Watchdog reset executed......................18 5.19 Internal RTD sensor error......................19 5.20 Sensor failure...........................19 5.21 Sensor measurement error...................... 19 5.22 Sensor measurement error...................... 19 Appendix A Reference Data......................21 A.1 Product certifications........................ 21 A.2 Ordering Information, Specifications, and Drawings..............21 A.3 Dimensional drawings.......................
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Page 5: Chapter 1 Introduction
Rosemount Volume 1 Temperature Sensors and Accessories (English) Product Data Sheet • Rosemount DIN-Style Temperature Sensors and Thermowells (Metric) Product Data Sheet Table 1-1: Change Summary: Rosemount 248 Rail Mount HART Device Revision Release date NAMUR NAMUR HART software Manual document software... -
Page 6: Product Recycling/Disposal
Introduction Reference Manual March 2022 00809-0200-4825 ® • Communication via Asset Management tool (e.g. Pactware, AMS, HART communicator) for which all relevant DD, eDD and DTM files are available. Product recycling/disposal Recycling of equipment and packaging should be taken into consideration and disposed of in accordance with local and national legislation/regulations. -
Page 7: Chapter 2 Installation
Process leaks could result in death or serious injury. Do not remove the thermowell while in operation. Install and tighten thermowells and sensors before applying pressure. Electrical shock could cause death or serious injury. Use extreme caution when making contact with the leads and terminals. Emerson.com/Rosemount... -
Page 8: Connections
Installation Reference Manual March 2022 00809-0200-4825 Connections Single input 2 w / 3 w / 4 w RTD or TC (internal CJC or 3 w / 4 w lin. R external 2 w / 3 w / 4 w potentiometer CJC) 41 42 41 42... -
Page 9: Chapter 3 Configuration
• Via programming framework (e.g. AMS Device Manager, DCS, PACTware HART communicator To get access to product-specific commands, the HART communicator must be loaded with Emerson's DDL driver. This can be ordered through either the FieldComm Group or Emerson. Emerson.com/Rosemount... - Page 10 Configuration Reference Manual March 2022 00809-0200-4825 A. Rosemount transmitter B. Ex area C. Safe area D. 250 Ω < R < 1100 Ω load E. Receiving equipment F. +V supply G. Input Programming framework ® ™ Support for both EDD and FDT /DTM technology, offering configuration and monitoring via relevant DCS/Asset Management Systems and supported management packages (e.g.
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Page 11: Operation And Maintenance
Onboard LED indicates faults according to NAMUR NE44 and NE107. Condition LED status Device OK Constant green No supply Fault indication independent of the device (e.g. wire break, Flashing red sensor short circuit, violation of input or output limits) Device error Constant red Emerson.com/Rosemount... -
Page 12: Jumpers
Operation and Maintenance Reference Manual March 2022 00809-0200-4825 Jumpers The Rosemount 248R Transmitters have two front jumpers: one to enable Write Protection and one to select the output current at Safe State to go above 21 mA as specified in NAMUR NE43. If the jumper is not inserted, the output current at Safe State will go lower than 3.6 mA as specified in NAMUR NE43. - Page 13 The universal active password “00002008” will always be accepted and this value cannot be changed. The universal active password shall only be used if the active password has been lost and needs to be reset to a known value. Emerson.com/Rosemount...
- Page 14 Operation and Maintenance Reference Manual March 2022 00809-0200-4825 When changing the password, use only Latin-1 characters that can be entered and displayed on any terminal. When write protection is enabled, no “write” commands are accepted regardless of the “Write Protect” hardware jumper position. Write protection by jumper If a hardware jumper is set in “Write Protect”...
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Page 15: Chapter 5 Troubleshooting
A sensor error (broken/shorted sensor) is detected on Sensor 1. Recommended action Reconnect or repair sensor. CJC for input 1 error (only if used) LED status: flashing red A sensor error (broken/shorted sensor) is detected on the CJC measurement used for input Emerson.com/Rosemount... -
Page 16: Configuration Not Supported By Device
Troubleshooting Reference Manual March 2022 00809-0200-4825 Recommended action Reconnect or repair sensor. Configuration not supported by device LED status: solid red Configuration is temporary invalid < 3 seconds, e.g. while downloading parameters. Recommended action Correct and re-send the configuration. Electronic temperature out of limits LED status: flashing red The device is operated outside its specified temperature range. -
Page 17: Electronics Failure
1. Check power supply (at output terminals). Reset or re-power the device. 2. If the error is persistent send the device for evaluation or replace the device. 5.14 Electronics failure LED status: solid red The configuration in the NVM has become inconsistent. Emerson.com/Rosemount... -
Page 18: Electronics Failure
Troubleshooting Reference Manual March 2022 00809-0200-4825 Recommended action 1. Correct and/or re-send the configuration. 2. If the error is persistent send the device for evaluation or replace the device. 5.15 Electronics failure LED status: solid red An unrecoverable error occurred in the internal communication to the EEPROM. Recommended action 1. -
Page 19: Internal Rtd Sensor Error
Sensor measurement error LED status: flashing red A critical measurement error is detected on the ground measurement. Recommended actions 1. Reconnect or repair sensor. 2. If the error is persistent send the device for evaluation or replace the device. Emerson.com/Rosemount... - Page 20 Troubleshooting Reference Manual March 2022 00809-0200-4825 Rosemount 248R...
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Page 21: Appendix A Reference Data
3. Click Manuals & Guides. 4. Select the appropriate Quick Start Guide. Ordering Information, Specifications, and Drawings To view current Rosemount 248 Ordering information, Specifications, and Drawings, follow these steps: Procedure 1. Go to Emerson.com/Rosemount/Rosemount-248. 2. Scroll as needed to the green menu bar and click Documents & Drawings. -
Page 22: Dimensional Drawings
Reference Data Reference Manual March 2022 00809-0200-4825 Dimensional drawings Figure A-1: Rosemount 248R Rail Mount RK Option Dimensions are in inches (millimeters). Rosemount 248R... - Page 23 Reference Manual 00809-0200-4825 March 2022 Emerson.com/Rosemount...
- Page 24 2022 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...