Reference Manual 00809-0300-4248, Rev AA July 2014 Rosemount 248 Wireless Temperature Transmitter
Reference Manual 00809-0300-4248, Rev AA Rosemount 248 Wireless Temperature Transmitter Rosemount 248 Hardware Revision HART® Device Revision Field Communicator Field Device Revision 1 1 Dev 1, DD v1 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.
Reference Manual 00809-0300-4248, Rev AA Failure to follow these installation guidelines could result in death or serious injury: Make sure only qualified personnel perform the installation. Explosions could result in death or serious injury: Installation of this transmitter in an explosive environment must be in accordance with the appropriate local, national, and international standards, codes, and practices.
Reference Manual 00809-0300-4248, Rev AA NOTICE Shipping considerations for wireless products (Lithium Batteries: Green Power Module, model number 701PGNKF): The unit was shipped to you without the Power Module installed. Please remove the Power Module prior to shipping the unit. Each Power Module contains one “D” size primary lithium-thionyl chloride battery. Primary lithium batteries are regulated in transportation by the U. S.
Reference Manual Table of Contents 00809-0300-4248, Rev AA July 2014 Contents 1Section 1: Introduction 1.1 Using this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.
Reference Manual Table of Contents 00809-0300-4248, Rev AA July 2014 3.5 Physical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 3.5.1 Direct mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 3.5.2 Remote mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 4Section 4: Commissioning 4.1 Safety messages . . . . . . .
Reference Manual Table of Contents 00809-0300-4248, Rev AA July 2014 BAppendix B: Product Certifications B.1 Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 B.2 European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 B.3 Ordinary Location Certification from FM Approvals . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents July 2014 x Reference Manual 00809-0300-4248, Rev AA Table of Contents
Section 1: Introduction Reference Manual July 2014 00809-0300-4248, Rev AA Section 1 1.1 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: Section 2: Configuration provides instruction on commissioning and operating 248 Wireless transmitters.
Section 1: Introduction 1.2 Reference Manual 00809-0300-4248, Rev AA July 2014 Safety messages Instructions and procedures in this section may require special precautions to ensure the safety of the personnel performing the operations. Information that potentially raises safety issues is indicated by a warning symbol ( ). Please refer to the following safety messages before performing an operation preceded by this symbol. 1.2.
Reference Manual 00809-0300-4248, Rev AA 1.3 Considerations 1.3.1 General Section 1: Introduction July 2014 Electrical temperature sensors such as RTDs and thermocouples produce low-level signals proportional to their sensed temperature. With simple HART configuration, the Rosemount 248 Wireless converts the low-level sensor signal to a wireless-enabled signal. 1.3.2 Commissioning The transmitter can be commissioned before or after installation.
Section 1: Introduction 1.3.3 Reference Manual 00809-0300-4248, Rev AA July 2014 Mechanical Location When choosing an installation location and position, take into account the need for access to the mesh network, access to the transmitter and to the power module compartment for ease power module replacement. Electronics cover 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.
Reference Manual Section 1: Introduction 00809-0300-4248, Rev AA July 2014 Temperature limits 1.4 Operating limit Storage limit –40 to 185 °F –40 to 185 °F –40 to 85 °C –40 to 85 °C Service support To expedite the return process outside of the United States, contact the nearest Emerson Process Management representative. Within the United States, call the Emerson Process Management Instrument and Valves Response Center using the 1-800-654-RSMT (7768) toll-free number.
Section 1: Introduction Reference Manual 00809-0300-4248, Rev AA July 2014 NOTICE Shipping considerations for wireless products (Lithium Batteries: Green Power Module, model number 701PGNKF): The unit was shipped to you without the Power Module installed. Please remove the Power Module prior to shipping the unit. Each power module contains a primary lithium-thionyl chloride battery. Primary lithium batteries are regulated in transportation by the U. S.
Section 2: Configuration Reference Manual July 2014 00809-0300-4248, Rev AA Section 2 Configuration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 2.2.1 Warnings Failure to follow these installation guidelines could result in death or serious injury. Make sure only qualified personnel perform the installation. Explosions could result in death or serious injury. Before connecting a Field Communicator in an explosive atmosphere, make sure the instruments are installed in accordance with intrinsically safe or non-incendive field wiring practices.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA 2.3 July 2014 Sensor connections The 248 Wireless 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. To ensure a proper sensor connection, anchor the sensor lead wires into the appropriate compression terminals and tighten the screws. Thermocouple or Millivolts inputs The thermocouple can be connected directly to the transmitter.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 Figure 2-1. Sensor Wiring Diagrams 248 Wireless sensor connections diagram 1 2 3 4 2-wire RTD and 1 2 3 4 3-wire RTD and 1 2 3 4 4-wire RTD and 1 2 3 4 T/C and mV Note Emerson Process Management provides 4-wire sensors for all single element RTDs. Use these RTDs in 3-wire or 2-wire configurations by leaving the unneeded leads disconnected and insulated with electrical tape. Figure 2-2.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 Figure 2-4. Rosemount 185 Thermocouple Lead Wire Configurations Type J Type N + A + E – B – F Type K + C – D A. Black (2) B. White (3) C. Green (2) D. White (3) E. Red (2) F. White (3) Note Wire color examples apply to Rosemount sensors, but will vary by manufacturer.
Section 2: Configuration 2.4 Reference Manual 00809-0300-4248, Rev AA July 2014 Bench top configuration Bench top configuration requires a Field Communicator, AMS, or any WirelessHART Communicator. Connect the Field Communicator leads to the terminals labeled “COMM” on the Power Module. Bench top configuration consists of testing the transmitter and verifying transmitter configuration data. 248 Wireless transmitters must be configured before installation.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 Device sensor configuration Every temperature sensor has unique characteristics. In order to ensure the most accurate measurement, the Rosemount 248 Wireless should be configured to match the specific sensor that it will be connected to. Prior to installation, verify the configuration and connection settings of the temperature sensor through a Field Communicator or AMS.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 2.5 Device network configuration 2.5.1 Join to network Fast Keys 2, 1, 1 In order to communicate with the Smart Wireless Gateway, and ultimately the Host System, the transmitter must be configured to communicate over the wireless network. This step is the wireless equivalent of connecting wires from a transmitter to the host system. 1. From the Home screen, choose 2: Configure. 2. Choose 1: Guided Setup. 3.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA 2.5.3 July 2014 HART menu tree Figure 2-5. Field Communicator Menu Tree: Overview Device Status 1. Refresh Alerts 2. No Active Alerts 3. F: Electrical Failure 4. F: Terminal Block Failure 5. F: Sensor Failure 6. F: Radio Failure 7. F: Supply Voltage Failure 8. M: Electronics Warning 9. M: Sensor has Exceeded Limits 10. M: Electronics Temperature has Exceeded Limits 11. M: Terminal Temperature has Exceeded Limits 12.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 Figure 2-6. Field Communicator Menu Tree: Configure Wireless 1. Network ID 2. Join to Network 3. Broadcast Info Guided Setup 1. Join to Network 2. Configure Update Rate (2. Configure Adv Brdcsg) 3. Configure Sensor 4. Configure Process Alarm 5. Configure Device Display 6. Calibrate Sensor Home 1. Overview 2. Configure 3. Service Tools Configure 1. Guided Setup 2. Manual Setup 3. Alert Setup Manual Setup 1.Wireless 2.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 Figure 2-7. Field Communicators Menu Tree: Service Tools Home 1. Overview 2. Configure 3. Service Tools Device Status 1. Refresh Alerts 2. No Active Alerts 3. F: Electrical Failure 4. F: Terminal Block Failure 5. F: Sensor Failure 6. F: Radio Failure 7. F: Supply Voltage Failure 8. M: Electronics Warning 9. M: Sensor has Exceeded Limits 10. M: Electronics Temperature has Exceeded Limits 11.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 2.5.4 Fast Key sequence Table 2-2 lists the fast key sequences for common transmitter functions. Note The fast key sequences assume that DD Dev v1, DD v1 is being used. Table 2-2. Rosemount 248 Wireless fast key sequence Function Key sequence Device Information 1, 7 PV Range Values 2.5.
Reference Manual Section 2: Configuration 00809-0300-4248, Rev AA July 2014 The Sensor Input Trim command allows the transmitter’s interpretation of the input signal to be digitally altered. The sensor reference command trims, in engineering(F, C,R, K) or raw(, mV) units, the combined sensor and transmitter system to a site standard using a known temperature source. Sensor trimming is suitable for validation procedures or for applications that require calibrating the sensor and transmitter together.
Section 2: Configuration 2.6 Reference Manual 00809-0300-4248, Rev AA July 2014 Remove power module After the sensor and network have been configured, 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.
Section 3: Installation Reference Manual July 2014 00809-0300-4248, Rev AA Section 3 Installation Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wireless consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Field Communicator connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mounting . . . . . .
Section 3: Installation Reference Manual 00809-0300-4248, Rev AA July 2014 This device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions: This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operation. This device must be installed to ensure a minimum antenna separation distance of 20 cm from all persons. The Power Module may be replaced in a hazardous area.
Reference Manual Section 3: Installation 00809-0300-4248, Rev AA 3.4 July 2014 Mounting The Rosemount 248 Wireless can be installed in one of two configurations: Direct Mount, where the sensor is connected directly to the 248 Wireless housing’s conduit entry, or Remote Mount, where the sensor is mounted separate from the 248 Wireless housing, then connected to the 248 Wireless via conduit. Choose the installation sequence that corresponds to the mounting configuration.
Reference Manual Section 3: Installation 00809-0300-4248, Rev AA July 2014 3.5.1 Direct mount The direct mount installation should not be used when installing with a Swagelok® fitting. 1. Install the sensor according to standard installation practices. Be sure to use an approved thread sealant on all connections. 2. Attach the 248 Wireless housing to the sensor using the threaded conduit entry. 3. Attach the sensor wiring to the terminals as indicated on the wiring diagram. 4.
Section 4: Commissioning Reference Manual July 2014 00809-0300-4248, Rev AA Section 4 Commissioning Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Verify operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AMS™ Wireless Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference Manual Section 4: Commissioning 00809-0300-4248, Rev AA July 2014 This device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions: This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operation. This device must be installed to ensure a minimum antenna separation distance of 20 cm from all persons. The Power Module may be replaced in a hazardous area.
Reference Manual 00809-0300-4248, Rev AA Section 4: Commissioning July 2014 Note 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 248 Wireless Terminal Diagram” on page 28) and the sensor configuration (see “248 Wireless fast key sequence” on page 26). Figure 4-1. Smart Wireless Gateway Network Settings 4.
Reference Manual Section 4: Commissioning 00809-0300-4248, Rev AA July 2014 4.4 Troubleshooting If the device is not joined to the network after power up, verify the correct configuration of the Network ID and Join Key, and verify that Active Advertising has been enabled on the Smart Wireless Gateway. The Network ID and Join Key in the device must match the Network ID and Join Key of the Gateway.
Section 5: Operation and Maintenance Reference Manual July 2014 00809-0300-4248, Rev AA Section 5 Operation and Maintenance Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 29 Power module replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 30 5.
Section 5: Operation and Maintenance 5.2 Reference Manual 00809-0300-4248, Rev AA July 2014 Power module replacement Expected Power Module life is 10 years at reference conditions.(1) When Power Module replacement is required, remove the cover and remove the Power Module. Replace the Power Module (part number 701PGNKF) and replace the cover. Tighten to specification and verify operation.
Reference Manual Section 5: Operation and Maintenance 00809-0300-4248, Rev AA July 2014 5.3 LCD screen messages 5.3.1 Startup screen sequence The following screens will display when the Power Module is first connected to the Rosemount 248 Wireless. XXXXX XXXXxxx All Segments On: used to visually determine if there are any bad segments on the LCD xxxxxx 2051 Device Identification: used to determine Device Type.
Reference Manual Section 5: Operation and Maintenance 00809-0300-4248, Rev AA July 2014 TERM 2 5. 0 0 SV Screen: terminal temperature value deg c DEV 2 5. 2 5 TV Screen: device temperature value deg c Suply 3. 6 0 QV Screen: voltage reading at the power supply terminals volts PRCNT 7.
Section 6: Troubleshooting Reference Manual July 2014 00809-0300-4248, Rev AA Section 6 Troubleshooting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rosemount 248 Wireless device status information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 6: Troubleshooting 6.2.1 Reference Manual 00809-0300-4248, Rev AA July 2014 Warnings Failure to follow these installation guidelines could result in death or serious injury: Make sure only qualified personnel perform the installation. Explosions could result in death or serious injury: Installation of this transmitter in an explosive environment must be in accordance with the appropriate local, national, and international standards, codes, and practices.
Reference Manual Section 6: Troubleshooting 00809-0300-4248, Rev AA July 2014 Table 6-1. Rosemount 248 Wireless device status information Device status Description Recommended action Electronics Failure An electronics error that could impact the device measurement reading has occurred. 1. Reset the device 2. Reconfirm all configuration items in the device 3.
Reference Manual Section 6: Troubleshooting 00809-0300-4248, Rev AA July 2014 Table 6-1. Rosemount 248 Wireless device status information Device status Description The device is in simulation mode and may not be reporting actual information. Simulation Active Recommended action 1. Verify that simulation is no longer required 2. Disable Simulation mode in Service Tools 3. Reset the device Table 6-2.
Appendix A: Specifications and Reference data Reference Manual July 2014 00809-0300-4248, Rev AA Appendix A Specifications and Reference Data Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 37 Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 44 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A: Specifications and Reference data A.1.2 Reference Manual 00809-0300-4248, Rev AA July 2014 Physical specifications Electrical connections Power Module Field replaceable, keyed connection eliminates the risk of incorrect installation. Intrinsically Safe Lithium-Thionyl chloride Power Module (Green Power Module, model number 701PGNKF) with PBT/PC enclosure. Ten-year life at one minute update rate.(1) Reference conditions are 70 °F (21 °C), and routing data for three additional network devices.
Reference Manual Appendix A: Specifications and Reference data 00809-0300-4248, Rev AA July 2014 Enclosure ratings (Rosemount 248 Wireless) NEMA 4X and IP66/67 A.1.3 Performance specifications Conformance to specification (±3(Sigma)) Technology leadership, advanced manufacturing techniques, and statistical process control ensure specification conformance to at least ±3. EMC (ElectroMagnetic Compatibility) The 248 Wireless meets all requirements listed under IEC 61326.
Reference Manual Appendix A: Specifications and Reference data 00809-0300-4248, Rev AA July 2014 A.1.4 Accuracy Table A-1. 248x Wireless accuracy Sensor options Sensor reference 2-, 3-, 4-wire RTDs Digital accuracy(1) Input ranges °C °F °C °F Pt 100 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 ± 0.45 ± 0.81 Pt 200 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 ± 0.45 ± 0.81 Pt 500 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 ± 0.57 ± 1.026 Pt 1000 ( = 0.
Reference Manual Appendix A: Specifications and Reference data 00809-0300-4248, Rev AA A.1.5 July 2014 Ambient temperature effect Table A-2. 248x Wireless Ambient temperature effects Sensor options Sensor reference 2-, 3-, 4-wire RTDs Input range Temperature effects per 1.0 °C (1.8 °F) change in Ambient Temperature °C °F Digital accuracy Pt 100 ( = 0.00385) IEC 751 –200 to 850 0.009 °C (0.0162 °F) Entire Sensor Input Range Pt 200 ( = 0.00385) IEC 751 –200 to 850 0.012 °C (0.
Reference Manual Appendix A: Specifications and Reference data 00809-0300-4248, Rev AA July 2014 Table A-2. 248x Wireless Ambient temperature effects Sensor options Sensor reference Input range Temperature effects per 1.0 °C (1.8 °F) change in Ambient Temperature Digital accuracy Type N NIST Monograph 175, IEC 584 –200 to 1300 0.0204 °C + (0.00108% of absolute value T) All Type R NIST Monograph 175, IEC 584 0 to 1768 0.048 °C T 200 °C 0.069 °C - (0.
Reference Manual Appendix A: Specifications and Reference data 00809-0300-4248, Rev AA A.1.6 July 2014 Lead wire resistance effect Sensor lead wire resistance effect—RTD input Examples of approximate lead wire resistance effect calculations Pt 100 385 RTD Given: Total cable length: 150 m Imbalance of the lead wires at 20 °C: 0.5 0.025 /m Resistance/length (18 AWG Cu): Temperature coefficient of Cu (Cu): 0.039 / °C Temperature coefficient of Pt (Pt): 0.
Appendix A: Specifications and Reference data A.2 Reference Manual 00809-0300-4248, Rev AA July 2014 Dimensional drawings Rosemount 248 Wireless Remote Mount Remote mounted temperature sensor specified separately. Rosemount 248 Wireless Direct Mount Direct mounted temperature sensor specified separately (see ordering option code XA).
Reference Manual Appendix A: Specifications and Reference data 00809-0300-4248, Rev AA A.3 July 2014 Ordering information Table A-3. Rosemount 248 Wireless 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.
Reference Manual Appendix A: Specifications and Reference data 00809-0300-4248, Rev AA July 2014 Table A-3. Rosemount 248 Wireless 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. Mounting Bracket B5 Universal “L” Mounting Bracket for 2-in.
Appendix B: Product Certifications Reference Manual July 2014 00809-0300-4248, Rev AA Appendix B B.1 Product Certifications Approved Manufacturing Locations Rosemount Inc. - Chanhassen, Minnesota, USA Rosemount Temperature GmbH - Germany Emerson Process Management Asia Pacific - Singapore B.2 European Directive Information (Pending) B.
Appendix B: Product Certifications Reference Manual July 2014 00809-0300-4248, Rev AA 48 Product Certifications
Appendix C: Mapping for non-DD based Integration with Host Systems Reference Manual July 2014 00809-0300-4248, Rev AA Appendix C Mapping for non-DD based Integration with Host Systems Mapping of alert messages in the HART command 48 additional status . . . . . . . . . . . . page 49 Mapping of device variables index numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 50 C.
Appendix C: Mapping for non-DD based Integration with Host Systems Reference Manual 00809-0300-4248, Rev AA July 2014 Table C-2. Maintenance Alerts (M:) Additional status(1) Message Description Supply Voltage Low Byte 1 :: Bit 6 The supply voltage is low and may soon affect broadcast updates Electronics Temperature has Exceeded Limits Byte 1 :: Bit 3 The electronics temperature has exceeded the transmitter's maximum range (1) Location of the Alert in the HART command 48 Status field. Table C-3.
Reference Manual 00809-0300-4248, Rev AA July 2014 Standard Terms and Conditions of Sale can be found at www.rosemount.com/terms_of_sale The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount. the Rosemount logotype, and SMART FAMILY are registered trademarks of Rosemount Inc. Coplanar is a trademark of Rosemount Inc. Halocarbon is a trademark of the Halocarbon Products Corporation. Fluorinert is a registered trademark of Minnesota Mining and Manufacturing Company Corporation.
