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Rosemount 248 Reference Manual

Wireless temperature transmitter
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Reference Manual
00809-0100-4248, Rev DB
July 2020
™
Rosemount
248 Wireless Temperature
Transmitter

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Summary of Contents for Rosemount 248

  • Page 1 Reference Manual 00809-0100-4248, Rev DB July 2020 ™ Rosemount 248 Wireless Temperature Transmitter...
  • 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 your local Emerson Sales Representative. WARNING Failure to follow these installation guidelines could result in death or serious injury.
  • Page 3 Before installing the wireless transmitters The Rosemount 248 Wireless Temperature Transmitter and all other wireless devices should be installed only after the Wireless Gateway has been installed and is functioning properly. Wireless devices should also be powered up in order of proximity from the Wireless Gateway, beginning with the closest.
  • Page 4 NOTICE Power Module Considerations (Green Power Module, model number 701PGNKF): The Green Power Module with the wireless unit contains one “D” size primary lithium-thionyl chloride battery (model number 701PGNKF). Each battery contains approximately 5.0 grams of lithium. Under normal conditions, the battery materials are self- contained and are not reactive as long as the batteries and the pack integrity are maintained.

  • Page 5: Table Of Contents

    6.2 Safety messages........................47 6.3 Device status information......................48 6.4 Transmitter output........................51 6.5 LCD display..........................52 6.6 Wireless network........................52 6.7 Service support..........................53 Appendix A Reference data......................55 A.1 Product Certifications ....................... 55 A.2 Ordering Information, Specifications, and Drawings ..............55 Emerson.com/Rosemount...
  • Page 6 Contents Reference Manual July 2020 00809-0100-4248 Appendix B Alert Message Mapping....................57 Emerson.com/Rosemount...

  • Page 7: Chapter 1 Introduction

    July 2020 Introduction Using this manual The sections in this manual provide information on installing, operating, and maintaining ® the Rosemount 248 Wireless Temperature Transmitter with WirelessHART protocol. The sections are organized as follows: • Configuration provides instruction on commissioning and operating Rosemount 248 Wireless Transmitters.
  • Page 8 Introduction Reference Manual July 2020 00809-0100-4248 Emerson.com/Rosemount...

  • Page 9: Chapter 2 Configuration

    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. Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock. Emerson.com/Rosemount...

  • Page 10: Sensor Connections

    Care must be taken during transportation to and from the point of installation to prevent electrostatic charge build-up. Sensor connections The Rosemount 248 Wireless Transmitter is compatible with a number of RTD and thermocouple sensor types. Figure 2-1 shows the correct input connections to the sensor terminals on the transmitter.
  • Page 11 Independent of lead wire resistance up to 5 Ω per lead. Unbalanced lead wire resistance is the maximum resistance differences between any two leads. Figure 2-1: Sensor Wiring Thermocouple and mV 4-Wire RTD and Ω 3-Wire RTD and Ω 2-Wire RTD and Ω Emerson.com/Rosemount...
  • Page 12 Insulate or terminate the unused white lead in a manner that prevents shorting to the ground. To configure a single element, 4-wire RTD as a 2-wire system, connect matching colored wires first and then connect the paired wires to the terminal. Emerson.com/Rosemount...
  • Page 13 3. Remove the LCD display (if applicable). 4. Loosen the captive screws and remove LCD adapter plate (if applicable). 5. Attach the sensor leads according to Figure 2-1. 6. Reattach and secure LCD adapter plate to 5 in-lbs of torque (if applicable). Emerson.com/Rosemount...

  • Page 14: Bench Top Configuration

    Send key (F2). AMS configuration changes are implemented when the Apply button is clicked. The power module must be installed to provide power to the Rosemount 248 Wireless for configuration. To communicate to the transmitter, begin by removing the power module ®...
  • Page 15 July 2020 AMS Device Manager and AMS Wireless Configurator When configuring the Rosemount 248 Wireless using AMS Device Manager or AMS Wireless Configurator, double click the Rosemount 248 Wireless device icon (or right click and select Con/Setup), then select the Configure Menu. AMS configuration changes are implemented when the Apply button is clicked.

  • Page 16: Device Network Configuration

    3. Select 3: Configure Update Rate. When the device configuration is completed, remove the power module and replace the module cover. The power module should be inserted only when the device is ready to be commissioned. Use caution when handling the power module. Emerson.com/Rosemount...
  • Page 17 3. Device Type 1. Identification 4. Device Revision 2. Revisions 5. Software Revision 3. Radio 6. Hardware Revision 4. Security 7. Transmit PWR Lvl 8. Min Brdcst Updt Rt Security 1. Write Protect 2. Lock Status 3. Over the Air Upgrade Emerson.com/Rosemount...
  • Page 18 1. Hi-Hi Alarm 1. Tag 2. Hi Alarm 2. Long Tag 3. Lo Alarm 3. Descriptor 4. Lo-Lo Alarm 4. Message 5. Date 6. Country 7. SI Unit Control Power 1. Power Mode 2. Power Source 3. AC Power Filter Security Emerson.com/Rosemount...
  • Page 19 2. Sensor Status 3. Current Lower Trim 4. Current Upper Trim Simulate 5. Lower Sensor Trim 1. Sensor 6. Upper Sensor Trim 2. Electronics Temp 7. Recall Factory Trim 3. Supply Voltage Reset/Restore 1. Perform Master Reset 2. Restore Default Settings Emerson.com/Rosemount...
  • Page 20 The sensor trim function calibrates the sensor to the transmitter in temperature units or raw units. Unless your site-standard input source is NIST-traceable, the trim functions will not maintain the NIST-traceability of the system. Emerson.com/Rosemount...
  • Page 21 4. Apply changes. 2.5.6 Configuring the LCD display The LCD display configuration command allows customization of the LCD display to suit application requirements. The LCD display will alternate between the selected items. Emerson.com/Rosemount...
  • Page 22 5. Select desired display options and click Enter. Configuring LCD display with AMS Device Manager Procedure 1. Right click on the device and select Configure. 2. Click on Configure Device Display button under Optional Setup. 3. Select desired display options and click Enter. Emerson.com/Rosemount...
  • Page 23 HI alert value must be higher than the LO alert value. Both alert values must be within the temperature sensor limits. Figure 2-10: Rising Alert Figure 2-11: Falling Alert Assigned Value Alert “OFF” Alert “ON” Alert “OFF” Alert Set Point Deadband Time Emerson.com/Rosemount...

  • Page 24: Remove Power Module

    The power module should be inserted only when the device is ready to be commissioned. Use caution when handling the power module. The Power Module may be damaged if dropped from heights in excess of 20 feet. Emerson.com/Rosemount...

  • Page 25: Chapter 3 Installation

    The power module may be replaced in a hazardous area. The power module has surface resistivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Care must be taken during transportation to and from the point of installation to prevent electrostatic charge build-up. Emerson.com/Rosemount...

  • Page 26: Wireless Considerations

    3.2.1 Power up sequence The Rosemount 248 Wireless Transmitter and all other devices should be installed only after the Wireless Gateway (“Gateway”) has been installed and is functioning properly. Wireless devices should also be powered up in order of proximity from the Gateway, beginning with the closest.
  • Page 27 The electronics cover is tightened so that polymer contacts polymer. When removing the electronics cover, ensure that there is no damage done to the O-ring. If damaged replace with a Rosemount O-ring before reattaching cover, ensuring polymer contacts polymer (i.e. no O-ring visible).

  • Page 28: Mounting

    (moves 85 to 55 °C), or 30 °C. In this case, an extension of 5-in. meets this requirement, but 6-in. provides an additional margin of thermowells protection, thereby reducing risk of ambient thermal damage. Emerson.com/Rosemount...

  • Page 29: Physical Installation

    5. Attach the sensor wiring to the terminals as indicated on Figure 2-1. 6. Reattach and secure LCD display adapter plate to 5 in-lb of torque (if applicable). 7. Reattach the LCD display (if applicable). 8. Reattach and tighten the transmitter enclosure cover. 9. Remove the power module cover. Emerson.com/Rosemount...
  • Page 30 11. Reattach and tighten the power module cover. 12. Always ensure a proper seal by installing the electronics housing cover(s) so that polymer contacts polymer (i.e. no O-ring visible). Use Rosemount O-rings. 13. Provide 1.75-in. (45 mm) of clearance for units without an LCD display. Provide 3- in.
  • Page 31 12. Reattach and tighten the power module cover. 13. Always ensure a proper seal by installing the electronics housing cover(s) so that polymer contacts polymer (i.e. no O-ring visible). Use Rosemount O-rings. 14. Provide 1.75-in. (45 mm) of clearance for units without an LCD display. Provide 3- in.
  • Page 32 5. Reattach and tighten the transmitter enclosure cover. 6. Connect the Green Power Module. 7. Reattach and tighten the power module cover. 8. Always ensure a proper seal by installing the covers so that polymer contacts polymer (i.e. no O-ring visible). Use Rosemount O-rings. Emerson.com/Rosemount...
  • Page 33 Operating: –40 to 185 °F (–40 to 85 °C) Storage: –40 to 185 °F (–40 to 85 °C) Note Only use Rosemount wireless LCD display part number: 00753-3203-0001. Note An LCD display from a wired device will not function in a wireless device.
  • Page 34 Installation Reference Manual July 2020 00809-0100-4248 Emerson.com/Rosemount...

  • Page 35: Chapter 4 Commissioning

    The power module may be replaced in a hazardous area. The power module has surface resistivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Care must be taken during transportation to and from the point of installation to prevent electrostatic charge build-up. Emerson.com/Rosemount...

  • Page 36: Verify Operations

    00809-0100-4248 Note The Rosemount 248 Wireless and all other wireless devices should be installed only after the Wireless Gateway has been installed and is functioning properly.Wireless devices should also be powered up in order of proximity from the Wireless Gateway, beginning with the closest device to the Gateway.
  • Page 37 When the device has joined the network, it will appear in the Wireless Configurator window ® as illustrated in figure below. For HART communication, a Rosemount 248 Wireless DD is required. To obtain the latest DD, visit the Emerson Easy Upgrade site at: Emerson.com/Rosemount/Device-Install-Kits Figure 4-2: AMS Wireless Configurator Emerson.com/Rosemount...

  • Page 38: Reference Information

    3-wire RTD and Ω 4-wire RTD and Ώ T/C and mV Note Emerson provides 4-wire sensors for all single element RTDs. Use these RTDs in 3- or 2- wire configurations by leaving the unneeded leads disconnected and insulated with electrical tape. Emerson.com/Rosemount...
  • Page 39 Insulate or terminate the unused white lead in a manner that prevents shorting to the ground. To configure a single element, 4-wire RTD as a 2-wire system, connect matching colored wires first and then connect the paired wires to the terminal. Emerson.com/Rosemount...
  • Page 40 Figure 4-6: Thermocouple Lead Wire Configurations IEC 60584 thermocouple colors ASTM E-230 thermocouple colors Type POS(+) NEG(-) POS(+) NEG(-) Black White White Green White Yellow Brown White Blue Note Dual thermocouple sensors are shipped with one pair of the wires shrink wrapped together. Emerson.com/Rosemount...

  • Page 41: Operation And Maintenance

    The power module may be replaced in a hazardous area. The power module has surface resistivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Care must be taken during transportation to and from the point of installation to prevent electrostatic charge build-up. Emerson.com/Rosemount...

  • Page 42: Lcd Display Screen Messages

    X X X X x x Device Information - Tag: user entered tag which is eight characters long - will not display if all characters are blank A b c d e f g h Software Revision: device software revision Emerson.com/Rosemount...
  • Page 43 QV Screen: voltage reading at the power supply terminals S u p l y 3. 6 0 v o l t s Percent Range Screen: percent range reading P R C N T 7. 2 1 R A N G E Emerson.com/Rosemount...

  • Page 44: Power Module Replacement

    Note Use the Rosemount Wireless LCD Part Number: 00753-3203-0001. Power module replacement Expected power module life is 10 years at reference conditions. When power module replacement is required, remove the cover and remove the Green Power Module.
  • Page 45 Consult the material’s safety data sheet for battery specific information. 5.3.3 Shipping considerations The unit was shipped to you without the power module installed. Remove the power module prior to shipping the unit. Emerson.com/Rosemount...
  • Page 46 Operation and maintenance Reference Manual July 2020 00809-0100-4248 Emerson.com/Rosemount...

  • Page 47: Chapter 6 Troubleshooting

    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. Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock. Emerson.com/Rosemount...

  • Page 48: Device Status Information

    The wireless radio has detected a failure or stopped communicating. Recommended actions 1. Reset the device. 2. If the condition persists, replace the electronics. 6.3.3 Supply voltage failure Description The supply voltage is too low for the device to broadcast updates. Recommended actions Replace the power module. Emerson.com/Rosemount...
  • Page 49 Recommended actions 1. Reset the device. 2. Reconfirm all configuration items in the device. 3. If logging dynamic data not needed, this advisory can be safely ignored. 4. If the condition persists, replace the electronics. Emerson.com/Rosemount...
  • Page 50 Lo Lo alarm Description The primary variable has surpassed the user defined limit Recommended actions 1. Verify the process variable is within user specified limits. 2. Reconfirm the user defined alarm limit. 3. If not needed, disable this alert. Emerson.com/Rosemount...

  • Page 51: Transmitter Output

    2. Connect a Field Communicator and check the sensor limits to ensure calibration adjustments are within the sensor range. 6.4.2 Digital temperature output is erratic Potential cause Wiring Recommended actions Check sensor wiring integrity at all junctions to ensure proper connections. Potential cause Electronics module Emerson.com/Rosemount...

  • Page 52: Lcd Display

    Potential cause LCD display Recommended actions Ensure the LCD display is properly seated with the tabs snapped in place and fully engaged. Wireless network 6.6.1 Device not joining the network Recommended actions 1. Verify network ID and join key. Emerson.com/Rosemount...

  • Page 53: Service Support

    Serial numbers • The last process material to which the product was exposed The center will provide: • A Return Material Authorization (RMA) number • Instructions and procedures that are necessary to return goods that were exposed to hazardous substances. Emerson.com/Rosemount...
  • Page 54 Note If the device has been exposed to a hazardous substance, a Safety Data Sheet (SDS) must be included with the returned materials. An SDS is required by law to be available to people exposed to specific hazardous substances. Emerson.com/Rosemount...

  • Page 55: Appendix A Reference Data

    Reference data 00809-0100-4248 July 2020 Reference data Product Certifications To view current Rosemount 248 Wireless Temperature Transmitter Product Certifications, follow these steps: Procedure 1. Go to Emerson.com/Rosemount/Rosemount-248-Wireless. 2. Scroll as needed to the green menu bar and click Documents & Drawings.
  • Page 56 Reference data Reference Manual July 2020 00809-0100-4248 Emerson.com/Rosemount...
  • Page 57 The wireless radio has detected a failure or stopped communicating Supply Voltage Failure Byte 6 :: Bit 2 The supply voltage is too low for the device to broadcast Location of the Alert in the HART command 48 Status field. Emerson.com/Rosemount...
  • Page 58 The terminal temperature has exceeded Beyond Limits the transmitter’s maximum range Supply Voltage Low Byte 8 :: Bit 4 The supply voltage is low and may soon affect broadcast updates Location of the Alert in the HART command 48 Status field. Emerson.com/Rosemount...
  • Page 59 Reference Manual 00809-0100-4248 July 2020 Emerson.com/Rosemount...
  • Page 60 Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a Facebook.com/Rosemount trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Youtube.com/user/RosemountMeasurement Emerson family of companies. All other marks are the property of their respective owners.

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