Emerson Rosemount 248 Quick Start Manual
Rail mount temperature transmitter
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- Quick start manual (28 pages)
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Summary of Contents for Emerson Rosemount 248
- Page 1 Quick Start Guide 00825-0300-4825, Rev BB January 2024 Rosemount 248 Rail Mount ™ Temperature Transmitter with RK Option and HART 7 Protocol ®...
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Page 2: Table Of Contents
Quick Start Guide January 2024 Contents About this guide........................... 3 Installation............................ 6 Configuration..........................10 Mounting the transmitter......................13 Product certifications........................ 17 China RoHS..........................31 Emerson.com/Rosemount... -
Page 3: About This Guide
Temperature Transmitter Reference Manual for more instruction. The manual and this guide are also available electronically at Emerson.com/Rosemount. WARNING Explosions could result in death or serious injury. Installation of device in an explosive environment must be in accordance with appropriate local, national, and international standards, codes, and practices. - Page 4 Review the Hazardous Locations Certifications for any restrictions associated with a safe installation. Process leaks Process leaks could result in death or serious injury. Install and tighten thermowells and sensors before applying pressure. Do not remove the thermowell while in operation. Emerson.com/Rosemount...
- Page 5 January 2024 Quick Start Guide WARNING Electrical shock Electrical shock could cause death or serious injury. Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock. Unless marked, the conduit/cable entries in the housing use a ½– 14 NPT thread form.
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Page 6: 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 7 January 2024 Quick Start Guide 2.2 Connections Table 2-1: Single input connection 2 w / 3 w / 4 w Thermocouple 3 w / 4 w RTD or lin. R (TC) (internal CJC potentiometer or external 2 w / 3 w / 4 w CJC) 41 42 41 42 41 42...
- Page 8 The terminal connectors can be removed to install sensor and power wiring. After re-installation back into the device: 1. Align the terminal connectors with the internal pins. 2. Rotate the plastic hooks so that they are properly engaged in the supporting plastic piece. Emerson.com/Rosemount...
- Page 9 January 2024 Quick Start Guide 3. Push down on the terminal connector to properly set it into place. Note Improper seating can cause the hooks to wedge against the supporting plastic and cause the connector to unseat. Quick Start Guide...
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Page 10: Configuration
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 11 PACTware ™ HART communicator To get access to product-specific commands, the HART communicator must be loaded with Emerson's DDL driver. You can order this through either the FieldComm Group or Emerson. Figure 3-1: HART commmunicator A. Rosemount transmitter B. Ex area C.
- Page 12 Quick Start Guide January 2024 Figure 3-2: Programming framework A. Rosemount transmitter B. 250 Ω < R < 1100 Ω load C. Process computer D. DCS, etc. Emerson.com/Rosemount...
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Page 13: Mounting The Transmitter
January 2024 Quick Start Guide 4 Mounting the transmitter 4.1 Rail mount transmitter with remote mount sensor The most basic assembly uses: • A remote mounted transmitter • An integral mount sensor with terminal block • An integral style connection head •... - Page 14 B. Sensor leads with cable gland C. Integral mount sensor with terminal block D. Connection head E. Standard extension F. Threaded thermowell 4.2 Rail mount transmitter with threaded sensor The least complicated assembly uses: • A threaded sensor with flying heads Emerson.com/Rosemount...
- Page 15 January 2024 Quick Start Guide • A threaded sensor connection head • A union and nipple extension assembly • A threaded thermowell Refer to Rosemount DIN-Style Temperature Sensors and Thermowells (Metric) Product Data Sheet for complete sensor and mounting accessory information. 4.2.1 ...
- Page 16 Quick Start Guide January 2024 Figure 4-2: Typical Rail Mount Transmitter Mounting Configuration Using Threaded Style Sensor and Assembly A. Rail mount transmitter B. Threaded sensor connection head C. Threaded style sensor D. Standard extension E. Threaded thermowell Emerson.com/Rosemount...
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Page 17: Product Certifications
European Directive information A copy of the EU Declaration of Conformity can be found at the end of the Quick Start Guide. The most recent revision of the EU Declaration of Conformity can be found at Emerson.com/Rosemount. 5.2 Ordinary location certification... - Page 18 37 Vdc max T4: -58 °F (-50 °C) ≤ T ≤ 185 °F (85 °C) T5: -58 °F (-50 °C) ≤ T ≤ 158 °F (70 °C) T6: -58 °F (-50 °C) ≤ T ≤ 131 °F (55 °C) Emerson.com/Rosemount...
- Page 19 January 2024 Quick Start Guide Table 5-3: Division 2/Zone 2 Input Parameters (continued) vs Temperature Range Supply voltage Temperature range 30 Vdc max T4: -58 °F (-50 °C) ≤ T ≤ 185 °F (85 °C) T5: -58 °F (-50 °C) ≤ T ≤...
- Page 20 Table 5-5: IS Output Parameters per Terminal Configuration Parameters One sensor using Sensor using one set all output terminals of output terminals (41-54) (41-44 or 51-54) 7.2 Vdc 7.2 Vdc 12.9 mA 7.3 mA 23.3 mW 13.2 mW 200 mH 667 mH 13.5 uF 13.5 uF Emerson.com/Rosemount...
- Page 21 January 2024 Quick Start Guide Table 5-6: Division 2/Zone 2 Input Parameters vs Temperature Range Supply voltage Temperature range 37 Vdc max T4: -58 °F (-50 °C) ≤ T ≤ 185 ° F (85 °C) T5: -58 °F (-50 °C) ≤ T ≤...
- Page 22 900 mW 122 °F (50 °C) 49 °F (65 °C) 185 °F (85 °C) 750 mW 131 °F (55 °C) 158 °F (70 °C) 185 °F (85 °C) 610 mW 149 °F (60 °C) 167 °F (75 °C) Emerson.com/Rosemount...
- Page 23 January 2024 Quick Start Guide (continued) Table 5-8: Temperature Pi per Channel Temperature class Maximum ambient temperature 185 °F (85 °C) Special Conditions for Safe Use (X): 1. For all potentially explosive atmospheres, if the enclosure is made of non-metallic materials, or if it is made of metal having a paint layer thicker than 0.00787402 in.
- Page 24 2 or better, as defined in EN 60664-1. 4. For EPL Dc, the surface temperature “T” of the enclosure, for a dust layer with a maximum thickness of 0.19685039 in. (5 mm), is the ambient temperature +20K. Emerson.com/Rosemount...
- Page 25 January 2024 Quick Start Guide 5.7 International 5.7.1 I7 IECEx Intrinsic Safety Certificate IECEx DEK 21.0002X IEC 60079-0: 2011, IEC 60079-11: 2011 Standards Ex ia IIC T6…T4 Ga Markings Ex ib [ia Ga] IIC T6…T4 Gb Ex ia IIIC Da Ex ia I Ma Note When installed per Control Drawing .
- Page 26 = 851 185 °F (85 °C) mW per 158 °F (70 °C) channel 131 °F (55 °C) Vmax = 30 = 30 Vdc = 700 185 °F (85 °C) mW per 167 °F (75 °C) channel 140 °F (60 °C) Emerson.com/Rosemount...
- Page 27 January 2024 Quick Start Guide Table 5-14: Maximum output of transmitter Ex nA & Ex ec Ex ic Vmax = 7.2 Vdc = 7.2 Vdc = 7.3 mA = 13.2 mW = 667 mH = 13.5 µF Special Conditions for Safe Use (X): 1.
- Page 28 Quick Start Guide January 2024 5.8.2 N3 China (NEPSI) Zone 2 GYJ21.1036X Certificate GB3836.1-2010, GB3836.4-2010, GB3836.8-2014, Standards GB3836.20-2010 Ex nA [ic Gc] IIC T6…T4 Gc Markings Ex ic IIC T6…T4 Gc Special Condition for Safe Use (X): See certificate for special conditions. Emerson.com/Rosemount...
- Page 29 January 2024 Quick Start Guide 5.9 Declaration of conformity Quick Start Guide...
- Page 30 Quick Start Guide January 2024 Emerson.com/Rosemount...
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Page 31: China Rohs
January 2024 Quick Start Guide 6 China RoHS Quick Start Guide... - Page 32 2024 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.