Rosemount 148 Reference Manual
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Rosemount 148 Reference Manual

Temperature transmitter
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Reference Manual
00809-0100-4148, Rev BA
July 2010
Rosemount 148 Temperature Transmitter
www.rosemount.com

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  • Page 1 Reference Manual 00809-0100-4148, Rev BA July 2010 Rosemount 148 Temperature Transmitter www.rosemount.com...
  • Page 3 Rosemount 148 July 2010 Rosemount 148 Temperature Transmitter Rosemount 148 Hardware Revision 5 NOTICE Read this manual before working with the product. For personal and system safety, and for optimum product performance, make sure to thoroughly understand the contents before installing, using, or maintaining this product.

  • Page 5: Table Of Contents

    Configuration ..........3-2 Rosemount 148 PC Programmer ......3-2 Configuring with the 148 PC Programmer .
  • Page 6 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 APPENDIX A Transmitter Specifications ........A-1 Functional Specifications .

  • Page 7: Section 1 Introduction

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Section 1 Introduction Safety Messages ....... . . page 1-1 Overview .

  • Page 8: Overview

    Refer to the following literature for sensors and thermowells that can be assembled to the Rosemount 148. They include additional connection heads that may not be available in the Rosemount 148 model structure. • Temperature Sensors and Accessories (English) Product Data Sheet (Document Number 00813-0100-2654) •...

  • Page 9: Considerations

    Take into account the need for access to the transmitter when choosing an installation location. Special Mounting Special hardware is available for mounting a Rosemount 148 head mount transmitter to a DIN rail. Proper electrical installation is necessary to prevent errors due to sensor lead Electrical resistance and electrical noise.

  • Page 10: Return Of Materials

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Figure 1-1. Rosemount 148 Transmitter Connection Head Temperature Rise vs. Extension Length. 150 175 200 Extension Length (mm) Example The transmitter specification limit is 85 °C. If the ambient temperature is 55 °C and the process temperature to be measured is 800 °C, the maximum...

  • Page 11: Product Recycling/Disposal

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Recycling of equipment and packaging should be taken into consideration PRODUCT and disposed of in accordance with local and national legislation/regulations. RECYCLING/DISPOSAL...
  • Page 12 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010...

  • Page 13: Safety Messages

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Section 2 Installation Safety Messages ....... . . page 2-1 Mounting .

  • Page 14: Mounting

    • To a DIN rail using an optional mounting clip Mounting a Rosemount 148 to a DIN Rail To attach a head mount transmitter to a DIN rail, assemble the appropriate rail mounting kit (Part Number 00248-1601-0001) to the transmitter as shown in...

  • Page 15: Installation

    Hardware Transmitter Rail Clip The Rosemount 148 can be ordered assembled to a sensor with the XA INSTALLATION option code and thermowell or as a stand-alone unit. If ordered without the sensor assembly, use the following guidelines when installing the transmitter with an integral sensor assembly.

  • Page 16: Typical North And South American Installation

    20.5 mA. Corresponding NAMUR compliant operation levels are 3.80 and 20.5 mA. These values are also custom configurable by the factory or using the Rosemount 148 PC Programmer interface. See “Configuration” on page 3-1 for instructions on how to change the alarm and...

  • Page 17: Wiring

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 NOTE Microprocessor failures cause high alarm regardless of alarm direction (high or low) choice. The values to which the transmitter drives its output in failure mode depend on whether it is configured to standard, NAMUR-compliant, or custom operations.

  • Page 18: Sensor Connections

    24.5 (0.97) Note: Signal loop may be grounded at any single point or left ungrounded. The Rosemount 148 is compatible with a number of RTD and thermocouple Sensor Connections sensor types. Figure 2-4 shows the correct input connections to the sensor terminals on the transmitter.
  • Page 19 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Sensor Lead Wire Resistance Effect - RTD Input When using a 4-wire RTD, the effect of lead resistance is eliminated and has no impact on accuracy. However, a 3-wire sensor will not fully cancel lead resistance error because it cannot compensate for imbalances in resistance between the lead wires.

  • Page 20: Power Supply

    To protect against high-energy transients, install the transmitter into a suitable connection head with the Rosemount 470 Transient Protector. Refer to the Rosemount 470 Transient Protector Product Data Sheet (Document Number 00813-0100-4191) for further information.
  • Page 21 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Ungrounded Thermocouple, and RTD/Ohm Inputs Each process installation has different requirements for grounding. Use the grounding options recommended by the facility for the specific sensor type, or begin with grounding Option 1 (the most common).
  • Page 22 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Option 3: Ground sensor wiring shield at the sensor, if possible. Ensure that the sensor wiring and signal wiring shields are electrically isolated from the transmitter housing. Do not connect the signal wiring shield to the sensor wiring shield.

  • Page 23: Safety Messages

    Configuration ........page 3-2 Rosemount 148 PC Programmer ....page 3-2...

  • Page 24: Rosemount 148 Pc Programmer

    148 transmitter making sure the polarity is correct. Install the 148 PC Program, included on compact disc, and then start the program. The device can be configured from the main screen, and will also show the current transmitter status. The following pages detail the settings that can be configured on the Rosemount 148.
  • Page 25 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Sensor Configuration The following sensors indicate the sensor type and the number of wires to be connected: 2-, 3-, or 4-wire Pt 100:  = 0.00385 /°C • 2-, 3-, or 4-wire Pt 100:  = 0.003916 /°C •...
  • Page 26 Alarm and Saturation Alarm Direction, Low Alarm Level, High Alarm Level, Low Saturation, and High Saturation values can be set here. Rosemount and NAMUR standard values can be found on Table A-1 * or user-configured values may be entered. The guidelines are as follows: •...

  • Page 27: Information

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Write Protect Write Protect safeguards the transmitter configuration data from accidental or unwarranted changes. The transmitter information tab can be selected from the main stat up screen, Information and lists the transmitter information variables that can be viewed. The Refresh button must be clicked to update the view of the current state of the transmitter.
  • Page 28 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010...

  • Page 29: Safety Messages

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Section 4 Operation and Maintenance Safety Messages ....... . . page 4-1 Hardware .

  • Page 30: Hardware

    Do not remove the thermowell while in operation. Select any standard, off-the-shelf sensor for use with a Rosemount 148 or consult the factory for a replacement special sensor and transmitter combination.

  • Page 31: Transmitter Specifications

    NE 43 - Standard of the signal level breakdown information of digital transmitters Transient Protection The optional Rosemount 470 prevents damage from transients induced by lightening, welding, heavy electrical equipment, or switch gears. Refer to the Rosemount 470 Product Data Sheet (Document Number 00813-0100-4191)

  • Page 32: Physical Specifications

    The Rosemount 148 installs in a connection head or universal head mounted directly on a sensor assembly or apart from a sensor assembly using a universal head. The Rosemount 148 can also mount to a DIN rail using an optional mounting clip.

  • Page 33: Performance Specifications

    The Rosemount 148 meets all requirements listed under IEC 61326: Amendment 1, 2006 Power Supply Effect Less than ±0.005% of span per volt Vibration Effect The Rosemount 148 is tested to the following specifications with no effect on performance: Frequency Vibration 10 to 60 Hz 0.21 mm displacement...
  • Page 34 3-wire* 4-wire RTD and * Rosemount Inc. provides 4-wire sensors for all single element RTDs. You can use these RTDs in 3-wire configurations by leaving the unneeded leads disconnected and insulated with electrical tape. Transmitter Accuracy and Ambient Temperature Effects...
  • Page 35 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Transmitter Accuracy Example When using a Pt 100 (a = 0.00385) sensor input with a 0 to 100 °C span, use the greater of the two calculated values. In this case the accuracy would be +/-0.3 °C.

  • Page 36: Dimensional Drawings

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 DIMENSIONAL DRAWINGS 148 Transmitter (enlarged) 33 (1.3) 44 (1.7) 12.9 (0.51) 24.5 (0.97) Dimensions are in millimeters (inches) Enclosures Universal Head (option codes H and U) Connection Head BUZ and Polypropylene Heads Approval Label 112 (4.41)
  • Page 37 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Examples of 148 Assemblies with Sensors and Thermowells Tubular Thermowell and Barstock Thermowell and Barstock Thermowell, Nipple-Union Extension, DIN Plate Style Sensor DIN Plate Style Sensor -in. NPT Spring Loaded Sensor...

  • Page 38: Ordering Information

    July 2010 ORDERING INFORMATION Table A-3. Rosemount 148 PC-Programmable Temperature Transmitter ★ The Standard offering represents the most common options. The starred options (★) should be selected for best delivery. __The Expanded offering is subject to additional delivery lead time.
  • Page 39 A size Mini, 4-pin, Male Connector (minifast ★ Assemble To Options Standard Standard Sensor Specified Separately and Assembled to Transmitter ★ Typical Model Number: 148 H N I5 U1 A1 XA (1) Approval Codes E1, N1, N7, ND, E5, K5, K6, and E7 require an enclosure...
  • Page 40 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 A-10...

  • Page 41: Hazardous Locations Certifications

    = 49.2 mH FM Explosion-Proof Explosion-Proof for Class I, Division 1, Groups B, C, and D. Dust Ignition Proof for Class II/III, Division 1, Groups E, F, G when installed in accordance with Rosemount drawing 00148-1065. Temperature Code: T5 (T = –40 to 85 °C)

  • Page 42: European Certifications

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 European Certifications ATEX Intrinsic Safety Certificate Number: See Certificate ATEX Marking: II 1 G 1180 EEx ia IIC Temperature Codes: T5 (–60  T  80 °C) T6 (–60  T ...

  • Page 43: Brazilian Certifications

    Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 ATEX Dust Ignition Proof Certificate Number: See Certificate ATEX Marking: II 1 D CE 1180 T95 C (-40  T  85 °C) IP66 TABLE 6. Input Parameters = 42.4 Vdc...

  • Page 44: Installation Drawings

    The installation guidelines presented by the drawings must be followed in INSTALLATION order to maintain certified ratings for installed transmitters. DRAWINGS Rosemount Drawing 00148-1055, Rev AA, 2 Sheets Factory Mutual Intrinsic Safety and Non-Incendive Installation Drawing Rosemount Drawing 00148-1065, Rev AA, 1 Sheet Factory Mutual Explosion-Proof Installation Drawing...
  • Page 45 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Figure B-1. Installation Drawing: 148 FM Intrinsic Safety, Drawing No. 00148-1055, Rev AA (1 of 2)
  • Page 46 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Figure B-2. Installation Drawing: 148 FM Intrinsic Safety, Drawing No. 00148-1055, Rev AA (2 of 2)
  • Page 47 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Figure B-3. Factory Mutual Explosion-Proof Installation Drawing, Drawing No. 00148-1065, Rev AA (1 of 1)
  • Page 48 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Figure B-4. CSA Explosion-Proof and Non-Incendive Installation Drawing, Drawing No. 00148-1056, Rev AA (1 of...
  • Page 49 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Figure B-5. IECEX Intrinsic Safety Installation Drawing, Drawing No. 00148-1057, Rev AA (1 of 1)
  • Page 50 Reference Manual 00809-0100-4148, Rev BA Rosemount 148 July 2010 Figure B-6. CSA Explosion-Proof Installation Drawing, Drawing No. 00644-1059, Rev AH (1 of 1) B-10...
  • Page 52 July 2010 The Emerson logo is a trademark 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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