Rosemount 848T Reference Manual
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Rosemount 848T Reference Manual

Wireless temperature transmitter
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Reference Manual
00809-0100-4848, Rev AA
July 2009
Rosemount 848T Wireless Temperature
Transmitter
www.rosemount.com

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Summary of Contents for Rosemount 848T

  • Page 1 Reference Manual 00809-0100-4848, Rev AA July 2009 Rosemount 848T Wireless Temperature Transmitter www.rosemount.com...
  • Page 3 For information on Rosemount nuclear-qualified products, contact a Emerson Process Management Sales Representative. Rosemount 848T Wireless Temperature Transmitter may be protected by one or more U.S. Patents issued or pending. Other foreign patents issued or pending. www.rosemount.com...
  • Page 4 NOTICE The Rosemount 848T Wireless and all other wireless devices should be installed only after the Smart Wireless Gateway has been installed and is functioning properly. Wireless devices should also be powered up in order of proximity from the Smart Wireless Gateway, beginning with the closest.

  • Page 5: Table Of Contents

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Table of Contents Safety Messages ........1-1 SECTION 1 Warnings .
  • Page 6 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Safety Messages ......... 4-1 SECTION 4 Warnings .

  • Page 7: Section 1 Safety Messages

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Section 1 Overview Safety Messages ....... . . page 1-1 Overview .

  • Page 8: Manual

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 OVERVIEW This manual is designed to assist in the installation, operation, and Manual maintenance of Rosemount 848T Wireless. Section 1: Overview • Manual and Transmitter Overview • Considerations • Return of Materials •...

  • Page 9: Transmitter

    General low-level signals proportional to their sensed temperature. With simple ® HART configuration, the Rosemount 848T Wireless converts the low-level sensor signal to a wireless-enabled signal. The transmitter can be commissioned before or after installation. It may be Commissioning useful to commission it on the bench, before installation, to ensure proper operation and to become familiar with its functionality.

  • Page 10: Electrical

    July 2009 Electrical Power Module The Rosemount 848T Wireless Temperature Transmitter is self-powered. The power module with the wireless unit contains 2 “C” size primary lithium/thionyl chloride batteries. Each battery contains approximately 2.5 grams of lithium, for a total of 5 grams in each power module. Under normal conditions, the battery materials are self-contained and are not reactive as long as the batteries and the power module are maintained.

  • Page 11: Product Recycling/Disposal

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 SHIPPING CONSIDERATIONS FOR WIRELESS PRODUCTS (LITHIUM BATTERIES): The unit was shipped to you without the power module installed. Please remove the power module prior to shipping the unit. Primary lithium batteries (charged or discharged) are regulated in transportation by the U.S.
  • Page 12 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009...

  • Page 13: Safety Messages

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 Section 2 Configuration Safety Messages ....... . . page 2-1 Introduction .

  • Page 14: Introduction

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 This section contains information on configuration and verification that should INTRODUCTION be performed prior to installation. Field Communicator and AMS instructions are included for performing configuration functions. Additionally, Field Communicator fast key sequences are identified for each software function.

  • Page 15: Default Settings

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 The 848T default configuration is shown below: DEFAULT SETTINGS Sensor 1 Type J Thermocouple Sensor 2 Type J Thermocouple Sensor 3 Type J Thermocouple Sensor 4 Type J Thermocouple Engineering Units °C...

  • Page 16: Configure Update Rate

    Select 3: Configure Sensors. Select 1: Configure Sensor Type/Connection. Each input can be configured on the 848T for different sensor types. Select the desired sensor type and lead wires for each sensor input. If an input is not being used, “Not Used” should be selected for the sensor type. Refer to the Sensor Wiring Diagram Figure 3-4 on page 3-4.

  • Page 17: Advanced Configuration (Optional)

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 ADVANCED CONFIGURATION (OPTIONAL) Alerts allow the user to set the transmitter to provide a notification when the Configure Process Alerts measurement readings exceed the specified temperature range. A high and...

  • Page 18: Device Temperature Engineering Units

    From the Home screen, select 2: Configure. Select 2: Manual Setup. Select 8: Other. Select 2: AC Power Filter. The 848T HART Tag (8 characters) can be configured to identify the device: HART Tag 2, 2, 7, 1 Fast Key From the Home screen, select 2: Configure.

  • Page 19: Hart® Menu Tree

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 ® Options listed in bold type indicate that a selection provides other options. For Menu Tree HART ease of operation, changing calibration and setup, such as sensor type, number of wires, and range values, can be completed in several locations.

  • Page 20: Fast Key Sequence

    Table 2-1 lists the fast key sequences for common transmitter functions. Fast Key Sequence NOTE: The fast key sequences assume that DD Dev v2, DD v1 is being used. Table 2-1. 848T Wireless Fast Function Key Sequence Menu Items Key Sequence...

  • Page 21: Safety Messages

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 Section 3 Installation Safety Messages ....... . . page 3-1 Wireless Considerations .

  • Page 22: Wireless Considerations

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 WIRELESS Power Up Sequence CONSIDERATIONS The Power Module should not be installed on any wireless device until the Smart Wireless Gateway (“Gateway”) is installed and functioning properly. Wireless devices should also be powered up in order of proximity from the Gateway, beginning with the closest.

  • Page 23: Sensor Connections

    Figure 3-3. Field Communicator Connection Diagram Maintenance Port The 848T Wireless is compatible with a number of RTD and thermocouple SENSOR CONNECTIONS sensor types. Figure 3-4 on page 3-4 shows the correct input connections to the sensor terminals on the transmitter. To ensure a proper sensor connection, anchor the sensor lead wires into the appropriate compression terminals and tighten the screws.
  • Page 24 2-wire RTD 1.0  in reading per ohm of lead wire resistance Figure 3-4. Sensor Wiring Diagrams 848T Wireless Sensor Connections Diagram 2-wire RTD 3-wire RTD Thermocouple, millivolt 4-wire RTD Refer to “Grounding Practices” on page 3-10 for more information on sensor grounding practices.
  • Page 25 Thermocouple Lead Wire Type J Type N Configurations + Black (2) + Red (2) White (3) – White (3) – Type K + Green (2) White (3) – Note: Wire color examples apply to Rosemount sensors, but will vary by manufacturer.
  • Page 26 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Examples of Approximate Lead Wire Resistance Effect Calculations Given: Total cable length 150 m Imbalance of the lead wires at 20 C 0.5  Resistance/length (18 AWG Cu): 0.025 /m Temperature coefficient of Cu (...

  • Page 27: Physical Installation

    Rosemount 848T Wireless July 2009 PHYSICAL INSTALLATION The Rosemount 848T Wireless can only be installed in the Remote Mount Remote Mount configuration where the sensor is mounted separate from the 848T housing, then connected to the 848T using conduit or cable glands.

  • Page 28: 4-20 Milliamp Inputs

    The 848T measures millivolt signals, to monitor a 4 – 20 mA signal there must be a conversion to millivolt using a 5 Ohm resistor to create a 20 -100 mV signal.

  • Page 29: Power Supply

    By converting a 4 – 20 mA signal to a measurable millivolt signal, it is considered as a second power source in the terminal block of the 848T, and voids the Intrinsically Safe approval. This does not affect the division 2, non-incendive approvals so this configuration can still be installed and operated in division 2 areas.

  • Page 30: Grounding Practices

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Because of resistor variances, the input must be calibrated with the resistor installed to meet the accuracy specifications located on page A-3. For more information on lower and upper trim procedures, see “Calibration” on page 5-2.
  • Page 31 Terminal Screw 5. The 4 – 20 mA signal shield should be electrically isolated from the 848T Wireless housing and the 4 – 20 mA device to ensure a single point ground. 4 – 20 mA...
  • Page 32 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 3-12...

  • Page 33: Safety Messages

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 Section 4 Commissioning Safety Messages ....... . . page 4-1 Insert Power Module .

  • Page 34: Insert Power Module

    If the Rosemount 848T Wireless was configured with the Network ID and Join NETWORK STATUS Key and sufficient time has taken place for network polling, the transmitter should be connected to the network.
  • Page 35 If the device joins the network and immediately has an alarm present, it is likely due to sensor configuration. Check the sensor wiring (see Rosemount 848T Terminal Diagram Figure 4-2 on page 4-3) and the sensor configuration (see 848T Fast Key Sequence for handheld communicator on page 2-8).

  • Page 36: Ams Wireless Configurator

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 When the device has joined the network, it will appear in the AMS Wireless AMS Wireless Configurator as illustrated below. Configurator...

  • Page 37: Safety Messages

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Section 5 Operation and Maintenance Safety Messages ....... . . page 5-1 Calibration .

  • Page 38: Calibration

    To calibrate the transmitter using the sensor trim function: Sensor Trim 3, 4, 1-4, Fast Key Assemble and power the calibration system including the 848T, Field Communicator/AMS, power supply, and temperature input source. From the Home Screen, select 3: Service Tools. Select 4: Routine Maintenance.

  • Page 39: Power Module Replacement

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Expected power module life is six years at reference conditions. POWER MODULE REPLACEMENT When power module replacement is required, open the cover and then remove the power module. Replace the power module (part number 00753-9220-0001) and close the cover making sure to tighten so that metal touches metal but do not over tighten.
  • Page 40 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009...

  • Page 41: Safety Messages

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Section 6 Troubleshooting Safety Messages ....... . . page 6-1 General Information .

  • Page 42: General Information

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 GENERAL INFORMATION Table 6-1. Device Status with Recommended Actions Device Status Description Recommended Actions 1. Reset the device. An electronics error has occurred 2. Reconfirm all of the configuration that could impact the device Electronics items in the device.

  • Page 43: Troubleshooting

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Device Status Description Recommended Actions Supply Voltage 1. Replace the Power Module. The supply voltage is too low for the Failure device to function properly. Supply Voltage 1. Replace the Power Module.
  • Page 44 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009...

  • Page 45: Specifications

    Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Appendix A Specifications and Reference Data Specifications ........page A-1 Dimensional Drawings .

  • Page 46: Performance Specifications

    Transmitters may be panel mounted or mounted to a 2-in. pipe stand using optional mounting brackets. See “Dimensional Drawings” on page A-5. Weight 848T Wireless - 4.75 lbs. (2.15 kg) Enclosure Ratings (848T Wireless) Housing option codes HA1 or HA2 are Type 4X and IP66 rated.

  • Page 47: Accuracy

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 Accuracy TABLE 1. Input Options/Accuracy Input Ranges Accuracy Over Range(s) Sensor Option Sensor Reference °C °F °C °F 2-, 3-, and 4-Wire RTDs Pt50 ( = 0.003910) GOST 6651-94 –200 to 550 –328 to 990...

  • Page 48: Ambient Temperature Effect

    Reference Manual 00809-0100-4848, RevAA Rosemount 848T Wireless July 2009 Ambient Temperature Effect Transmitters may be installed in locations where the ambient temperature is between –40 and 85 °C (–40 and 185 °F). TABLE 2. Ambient Temperature Effects Accuracy per 1.0 °C (1.8 °F) Change in Ambient...

  • Page 49: Dimensional Drawings

    Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 DIMENSIONAL DRAWINGS 848T Wireless Remote Mount 2.198 90° (55,82) (179,8) 3.204 10.223 (81,38) (259,68) 3.457 (87,8) 3.976 (100,99) Dimensions are in inches (millimeters)

  • Page 50: Ordering Information

    5-Point Calibration (requires Q4 option code to generate a calibration certificate) Calibration Certificate Calibration Certificate (3-Point Calibration with Certificate) Typical Model Number: 848T X I5 S001 WA3 WK1 B6 HA1 (1) Only available with product certification N5 or NA. Stable resistors are included. (2) Required for wireless...

  • Page 51: Approved Manufacturing Locations

    Ordinary Location Certification for FM ....page B-2 Hazardous Locations Certificates ....page B-2 Rosemount Inc. - Chanhassen, Minnesota, USA Approved Manufacturing Emerson Process Management GmbH &...

  • Page 52: European Union Directive Information

    July 2009 The EC declaration of conformity for all applicable European directives for this European Union product can be found on the Rosemount website at www.rosemount.com. A Directive Information hard copy may be obtained by contacting your local sales representative.
  • Page 53 Intrinsically Safe for Class I, Division 1, Groups A, B, C, and D. Temp Code T3C Enclosure Type 4X / IP66 For use with Rosemount power module P/N 753-9220-XXXX only Intrinsically Safe when installed per Rosemount drawing 00849-1016 N6 CSA Class 1, Division 2 Non-Incendive for Class I, Division 2, Groups A, B, C, and D.
  • Page 54 Ex ia IIC T4 (T = -60 °C to 70 °C) IP66 For use with Rosemount power module P/N 753-9220-XXXX only Special Conditions for Safe Use (X) The surface resistivity of the antenna is greater than one gigaohm. To avoid electrostatic charge build-up, it must not be rubbed or cleaned with solvents or a dry cloth.
  • Page 55 Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 Figure B-1. Rosemount 848T Wireless Intrinsically Safe and Non-Incendive Installation Drawing (Page 1 of 2)
  • Page 56 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Figure B-2. Rosemount 848T Wireless Intrinsically Safe and Non-Incendive Installation Drawing (Page 2 of 2)
  • Page 57 Reference Manual 00809-0100-4848, Rev AA Rosemount 848T Wireless July 2009 Figure B-3. Rosemount 848T Wireless CSA Intrinsic Safety Installation Drawing (Page 1 of 2)
  • Page 58 Reference Manual Rosemount 848T Wireless 00809-0100-4848, Rev AA July 2009 Figure B-4. Rosemount 848T Wireless CSA Intrinsic Safety Installation Drawing (Page 2 of 2)
  • Page 60 The Emerson logo is a trade mark and service mark of Emerson Electric Co. Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc. PlantWeb is a registered trademark of one of the Emerson Process Management group of companies.

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