Emerson Rosemount 1208C Reference Manual

Emerson Rosemount 1208C Reference Manual

Level and flow transmitter
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Reference Manual
00809-0200-7062, Rev AA
March 2023
Rosemount
1208C Level and Flow
Transmitter
Non-Contacting Radar

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Table of Contents
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Summary of Contents for Emerson Rosemount 1208C

  • Page 1 Reference Manual 00809-0200-7062, Rev AA March 2023 Rosemount ™ 1208C Level and Flow Transmitter Non-Contacting Radar...
  • Page 2 • 1-800-654-7768 (24 hours a day — includes Canada) • Outside of these areas, contact your local Emerson representative.  WARNING Failure to follow safe installation and servicing guidelines could result in death or serious injury. Ensure the transmitter is installed by qualified personnel and in accordance with applicable code of practice.
  • Page 3  CAUTION Hot surfaces The transmitter and process seal may be hot at high process temperatures. Allow to cool before servicing.
  • Page 5: Table Of Contents

    Reference Manual Contents 00809-0200-7062 March 2023 Contents Chapter 1  Introduction..........................7 1.1 Using this manual........................7 1.2 Product certifications........................7 1.3 Open source licenses........................7 1.4 Product recycling/disposal......................7 Chapter 2  Transmitter overview....................... 9 2.1 Measurement principle.......................9 2.2 Process characteristics........................9 2.3 Vessel characteristics........................ 10 2.4 Non-contacting radar technology................... 10 2.5 Components of the transmitter....................12 2.6 System integration........................
  • Page 6 7.6 Service support.......................... 66 Appendix A  Specifications and reference data..................67 A.1 Performance specifications..................... 67 A.2 Functional specifications......................69 A.3 Physical specifications......................71 A.4 Dimensional drawings......................73 Appendix B  Configuration parameters..................... 76 B.1 Menu tree...........................76 B.2 Device setup..........................76 B.3 Level setup..........................80 Rosemount 1208C Level and Flow Transmitter...
  • Page 7: Chapter 1 Introduction

    Configuration parameters provides extended information about the configuration parameters. 1.2  Product certifications See the Rosemount 1208C Product Certifications document for detailed information on the existing approvals and certifications. 1.3  Open source licenses This device uses open source software. Further information can be found in the License Information document available at Emerson.com/Rosemount.
  • Page 8 Introduction Reference Manual March 2023 00809-0200-7062 Rosemount 1208C Level and Flow Transmitter...
  • Page 9: Chapter 2 Transmitter Overview

    Δf∼d=distance A. Frequency (GHz) B. Time (s) C. Transmitted signal D. Reflected signal The Rosemount 1208C can also calculate the volume flow rate in an open channel. 2.2  Process characteristics 2.2.1  Dielectric constant A key parameter for measurement performance is reflectivity. A high dielectric constant of the media provides better reflection and enables a longer measuring range.
  • Page 10: Vessel Characteristics

    The Rosemount 1208C uses Frequency Modulated Continuous Wave (FMCW) technology and smart algorithms to maximize measurement accuracy and reliability, even in small tanks and challenging fast-filling vessels.
  • Page 11 Reference Manual Transmitter overview 00809-0200-7062 March 2023 Open channel flow Open-air channels transport water from a water source to a water plant where it will be processed. Flow monitoring in open channels is important to know the amount of water that is flowing to comply with regulations and avoid flooding. Differential level In the screening process level measurement is necessary to monitor the level of water in the different parts of the screen, which will determine when to start the cleaning of the...
  • Page 12: Components Of The Transmitter

    Components of the transmitter Figure 2-2: Components A. M12 male connector (A-coded) B. Transmitter housing C. Gasket for G threaded version D. NPT 1½-in. or ISO 228/1-G1½-in. thread E. Antenna Related information Dimensional drawings Rosemount 1208C Level and Flow Transmitter...
  • Page 13: System Integration

    C. Handheld communicator D. HART modem E. PC with AMS Device Configurator F. Host/DCS system The Rosemount 1208C is compliant with NAMUR NE 107 Field Diagnostics for standardized device diagnostic information. 2.6.1  Easy integration into control systems Connect the Rosemount 1208C to your host system or visualize and control your process data by pairing with the Rosemount 3490 Controller.
  • Page 14 Transmitter overview Reference Manual March 2023 00809-0200-7062 Rosemount 1208C Level and Flow Transmitter...
  • Page 15: Chapter 3 Mechanical Installation

    Reference Manual Mechanical installation 00809-0200-7062 March 2023 3  Mechanical installation 3.1  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 ( ).
  • Page 16 Do not mount the transmitter on a manway cover. • Do not position the transmitter directly over a side manway door. • Multiple Rosemount 1208C transmitters can be used in the same tank without interfering with each other. Figure 3-1: Recommended Mounting Position 3.2.2 ...
  • Page 17 Reference Manual Mechanical installation 00809-0200-7062 March 2023 3.2.3  Inclination The transmitter should be mounted vertically to ensure a good echo from the product surface. See Figure 3-3 for recommended maximum inclination. Figure 3-3: Inclination Max. 3° 90° 3.2.4  Non-metallic tanks Nearby objects outside the tank may cause disturbing radar echoes. Wherever possible, the transmitter should be positioned so that objects close to the tank are kept outside the signal beam.
  • Page 18 5.9 in. (150 mm) 2 in. (50 mm) 7.9 in. (200 mm) 3 in. (80 mm) 11.8 in. (300 mm) 4 in. (100 mm) 15.8 in. (400 mm) 6 in. (150 mm) 23.6 in. (600 mm) Rosemount 1208C Level and Flow Transmitter...
  • Page 19: Bracket Mounting

    Reference Manual Mechanical installation 00809-0200-7062 March 2023 3.3  Bracket mounting 3.3.1  Mount the standard bracket Procedure 1. Mount the bracket on the pipe/ceiling/wall. On pipe: 13 mm On ceiling/wall: Reference Manual...
  • Page 20 Reference Manual March 2023 00809-0200-7062 2. Ensure the adjustable holder is directed toward the ground. 90° 3. Install and hand tighten the transmitter. Note The nut is shipped with the transmitter. Related information Bracket hole pattern Rosemount 1208C Level and Flow Transmitter...
  • Page 21 Reference Manual Mechanical installation 00809-0200-7062 March 2023 3.3.2  Mount the extendable bracket Procedure 1. Mount the bracket on the pipe/wall. On pipe: 13 mm On wall: Reference Manual...
  • Page 22 Mechanical installation Reference Manual March 2023 00809-0200-7062 2. Mount the extendable arm. Do not fully tighten the screws at this stage. 3. Install and hand tighten the transmitter Note The nut is shipped with the transmitter. Rosemount 1208C Level and Flow Transmitter...
  • Page 23 Reference Manual Mechanical installation 00809-0200-7062 March 2023 4. Connect the M12 cable. 5. Ensure the adjustable holder is properly aligned. Reference Manual...
  • Page 24 Mechanical installation Reference Manual March 2023 00809-0200-7062 6. Fold down the arm to a horizontal position. 7. Adjust the length of the arm as necessary. Then tighten the two screws. Rosemount 1208C Level and Flow Transmitter...
  • Page 25 Reference Manual Mechanical installation 00809-0200-7062 March 2023 8. Check that the bracket installation is level. To raise or lower the arm, adjust the two level screws. Then tighten the two nuts. 10 mm 9. Tighten the two screws. Related information Bracket hole pattern Reference Manual...
  • Page 26: Installing On A Tank

    2. Place the flange over the gasket. 3. Tighten the bolts and nuts with sufficient torque for the flange and gasket choice. 4. Apply appropriate thread sealant to the transmitter threads. Note Only for NPT threaded tank connection. Rosemount 1208C Level and Flow Transmitter...
  • Page 27 Reference Manual Mechanical installation 00809-0200-7062 March 2023 5. Install and hand tighten the transmitter. Note The gasket is necessary for the G threaded version only. 3.4.2  Mount the NPT threaded adapter Procedure 1. Apply appropriate thread sealant to the outer threads. 2.
  • Page 28 Mechanical installation Reference Manual March 2023 00809-0200-7062 4. Install and hand tighten the transmitter. Rosemount 1208C Level and Flow Transmitter...
  • Page 29: Chapter 4 Electrical Installation

    Reference Manual Electrical installation 00809-0200-7062 March 2023 4  Electrical installation 4.1  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 ( ).
  • Page 30 (R) is determined by the voltage level of the external power supply (U R = 44.4 × (U − 14) Figure 4-1: Load Limits R (Ω) U E (Vdc) 19.6 4.2.7  Wiring diagram Figure 4-2: Connection Rosemount 1208C Level and Flow Transmitter...
  • Page 31: Power Up Transmitter

    Reference Manual Electrical installation 00809-0200-7062 March 2023 Table 4-1: Pin Assignment Wire color Signal Brown 24 V White Not connected Blue Black Not connected According to IEC 60947-5-2. 4.3  Power up transmitter Procedure Verify the power supply is disconnected. 2. Insert the M12 connector gently. Note Do not force the connector into place.
  • Page 32 Electrical installation Reference Manual March 2023 00809-0200-7062 Rosemount 1208C Level and Flow Transmitter...
  • Page 33: Chapter 5 Configuration

    Reference Manual Configuration 00809-0200-7062 March 2023 5  Configuration 5.1  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 ( ).
  • Page 34: Configuration Tools

    2. Download the latest FDI/DD/DTM Package at Emerson.com/DeviceInstallKits. 5.5  AMS Device Configurator 5.5.1  Download AMS Device Configurator AMS Device Configurator is a software for configuration of Emerson field devices using FDI technology. Procedure Download the software at Emerson.com/AMSDeviceConfigurator. 5.5.2  Add the FDI Package to AMS Device Configurator Procedure 1.
  • Page 35: Multidrop Communication

    Reference Manual Configuration 00809-0200-7062 March 2023 5.7  Multidrop communication Multidropping transmitters refers to the connection of several transmitters to a single communications transmission line. Communication between the host and the transmitters takes place digitally with the analog output of the transmitters deactivated. 5.7.1 ...
  • Page 36 Configuration Reference Manual March 2023 00809-0200-7062 Rosemount 1208C Level and Flow Transmitter...
  • Page 37: Operation And Maintenance

    Reference Manual Operation and maintenance 00809-0200-7062 March 2023 6  Operation and maintenance 6.1  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 ( ).
  • Page 38: View Measurement Data

    2. If status is anything other than Good, select the button in the device status image to open a window with Active Alerts. Active Alerts can also be obtained via Service Tools → Alerts. Related information Diagnostic messages per NAMUR NE 107 Rosemount 1208C Level and Flow Transmitter...
  • Page 39 Reference Manual Operation and maintenance 00809-0200-7062 March 2023 6.3.1  Device status images Table 6-1: Device Status Images in DD Device status image Category Description Action Good No active alert.   Failure At least one Failure alert is active. Click the Troubleshoot button to open a window with active alerts together with recommended actions.
  • Page 40 Operation and maintenance Reference Manual March 2023 00809-0200-7062 Rosemount 1208C Level and Flow Transmitter...
  • Page 41: Service And Troubleshooting

    Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 7  Service and troubleshooting 7.1  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 ( ).
  • Page 42: Diagnostic Messages Per Namur Ne 107

    Recommended actions 1. Restore default settings, restart device, and reconfigure the device. 2. If the condition persists, replace the device. Related information Restore to default settings Restart the device Configure transmitter using guided setup Rosemount 1208C Level and Flow Transmitter...
  • Page 43 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 7.2.4  Radar signal failure Failure Category Cause The received radar signal is invalid resulting in an invalid device measurement reading. Recommended actions 1. Clean the antenna. 2. If the condition persists, replace the device. 7.2.5 ...
  • Page 44 1. Check that the value pairs in the volume strapping table are entered in increasing order. 2. Check that the number of strapping points to use is correct. 3. If condition persists, restore default settings and reconfigure device. Rosemount 1208C Level and Flow Transmitter...
  • Page 45 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Related information Strapping table Restore to default settings Configure transmitter using guided setup Volume flow configuration error Cause The Volume Flow cannot be calculated correctly with the current configuration. Recommended actions 1. Check that the value pairs in the volume flow linearization table are entered in increasing order.
  • Page 46 3. If the condition persists, replace the device. Related information Restart the device Restore to default settings Configure transmitter using guided setup Factory calibration error Cause The factory calibration in the device is missing. Rosemount 1208C Level and Flow Transmitter...
  • Page 47 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Note This error may also be set as a result of the startup failure. If both errors are present, then see the startup failure message. Recommended actions Replace the device. Analog out span configuration error Cause The span for the configured analog out range is too small.
  • Page 48: Troubleshooting Guides

    7.3  Troubleshooting guides If there is a malfunction despite the absence of alerts, follow the procedures described in the appropriate troubleshooting guide. Under each of the symptoms, specific suggestions for solving problems are offered. Rosemount 1208C Level and Flow Transmitter...
  • Page 49 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 7.3.1  Troubleshooting incorrect level readings Reported level is too high or low Figure 7-1: Symptom A. Level B. Time C. Actual level D. Reported level Possible cause Incorrect tank geometry configuration. Recommended actions •...
  • Page 50 Remove the disturbing object. • Put an inclined metal plate on top of the disturbing object. • Move the transmitter to another position. Related information Analyze the echo peaks Adjust the general threshold Mounting position Rosemount 1208C Level and Flow Transmitter...
  • Page 51 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Level is stuck in full tank Figure 7-3: Symptom A. Level B. Time C. Actual level D. Reported level Possible cause Disturbing object near the antenna. Recommended actions • Analyze the Echo Peaks and check General Threshold. •...
  • Page 52 Product surface is within the Upper Null Zone and a disturbance echo is interpreted as the product surface. Recommended actions • Check the setting of the Upper Null Zone. Related information Change the upper null zone Rosemount 1208C Level and Flow Transmitter...
  • Page 53 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Measured level fluctuates Figure 7-5: Symptom A. Level B. Time C. Reported level Possible cause Excessive foaming or turbulence. Recommended actions • Under turbulent conditions with low level rates, consider increasing the Damping value.
  • Page 54 B. Time C. Actual level D. Reported level Possible cause The product surface is close to a suppressed false echo. Recommended actions • If possible, remove the disturbing object. Related information Analyze the echo peaks Rosemount 1208C Level and Flow Transmitter...
  • Page 55 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Lagging of measured level Symptom Measured level lags during rapid level changes. Figure 7-7: Symptom A. Level B. Time C. Actual level D. Reported level Possible cause Damping value is set too high. Recommended actions •...
  • Page 56 D. Reported level Possible cause Upper Range Value is not set correctly. Recommended actions • Check that the Upper Range Value matches the 100% (20 mA) level in the tank. Related information Upper/lower range value Rosemount 1208C Level and Flow Transmitter...
  • Page 57 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Incorrect level when product surface is above 50% Symptom The reported level is incorrect when the product surface is above the 50% level. Figure 7-9: Symptom A. Level B. Time C. Actual level D.
  • Page 58 A. Level B. Time C. Actual level D. Reported level Possible cause Transmitter has locked on a strong tank bottom echo. Recommended actions • Verify the Reference Height is configured correctly. Related information Reference height Rosemount 1208C Level and Flow Transmitter...
  • Page 59 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Level measurement lost in a manway cover installation Symptom The transmitter reports "Level measurement lost" when opening/closing the manway cover. Figure 7-11: Symptom A. Level B. Time C. Actual level D. Level measurement lost Possible cause If mounted on a manway cover, the transmitter may lock on a disturbance echo and report this as surface level when the cover is opened.
  • Page 60 Recommended actions • Before opening the manway door, disconnect power to the transmitter. • After closing, restart the device. • Move the transmitter to another position. Related information Mounting position Restart the device Rosemount 1208C Level and Flow Transmitter...
  • Page 61 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 Alarm mode close to tank bottom Symptom When the product surface is near the sloped tank bottom, the transmitter enters alarm mode. Figure 7-13: Symptom A. Level B. Time C. Actual level D. Reported level Possible cause Reduction of projected surface area close to sloping tank bottom.
  • Page 62 2. Check load resistance (250 ohms minimum). 3. Check if device is at an alternate HART address. 4. Check current analog output value to verify that device hardware works. Related information Power supply HART/polling address Rosemount 1208C Level and Flow Transmitter...
  • Page 63: Managing Disturbance Echoes

    Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 7.4  Managing disturbance echoes There are two general methods for managing disturbance echoes: • Set general threshold to filter out weak disturbance echoes and noise. • Increase the Upper Null Zone to block out disturbance echoes at the top of the tank. 7.4.1 ...
  • Page 64: Service And Troubleshooting Tools

    Echo tracked as the current surface echo Unknown Echo identified as unknown (can be a surface candidate) Irrelevant Echoes that are identified but suppressed by the device Tank bottom echo Echo considered as an echo from the tank bottom Rosemount 1208C Level and Flow Transmitter...
  • Page 65 Reference Manual Service and troubleshooting 00809-0200-7062 March 2023 7.5.2  Perform an analog loop test During a loop test, the transmitter outputs a fixed value (4 mA, 20 mA, or user-selected value). The loop test command verifies the output of the transmitter, the integrity of the loop, and the operations of any recorders or similar devices installed in the loop.
  • Page 66: Service Support

    Returned products must include a copy of the required Safety Data Sheet (SDS) for each substance. Emerson representatives will explain the additional information and procedures necessary to return goods exposed to hazardous substances.
  • Page 67: Appendix A Specifications And Reference Data

    Reference Manual Specifications and reference data 00809-0200-7062 March 2023 A  Specifications and reference data A.1  Performance specifications A.1.1  General Reference conditions • Measurement target: Stationary metal plate, no disturbing objects • Temperature: 59 to 77 °F (15 to 25 °C) • Ambient pressure: 14 to 15 psi (960 to1060 mbar) •...
  • Page 68 Radio Equipment Directive (2014/53/EU) and Radio Equipment Regulations (S.I. 2017/1206): — ETSI EN 302 372 — ETSI EN 302 729 — EN 62479 • Part 15 of the FCC Rules • Industry Canada RSS 211 Related information Product certifications Rosemount 1208C Level and Flow Transmitter...
  • Page 69: Functional Specifications

    Reference Manual Specifications and reference data 00809-0200-7062 March 2023 A.2  Functional specifications A.2.1  General Field of application Continuous measurement of level and open channel flow. Minimum dielectric constant Measurement principle Frequency Modulated Continuous Wave (FMCW) Frequency range 77 to 81 GHz Maximum output power 3 dBm (2 mW) Internal power consumption...
  • Page 70 • Signal strength: mV Output variables Variable 4-20 mA Digital output Level ✓ ✓ Distance (ullage) ✓ ✓ Volume ✓ ✓ Volume flow ✓ ✓ Electronics temperature ✓ Level rate ✓ Signal strength ✓ Rosemount 1208C Level and Flow Transmitter...
  • Page 71: Physical Specifications

    Emerson is not in a position to evaluate or guarantee the compatibility of the process fluid or other process parameters with the product, options, configuration, or materials of construction selected.
  • Page 72 Antenna and housing: PVDF • Gasket: EPDM or FKM GLT • Flange: PE100, 316/316L, or 1.4404 • Threaded adapter: 316/316L/1.4404 Verified with selection of cables from Weidmuller; for other cable selections IP68 conditions may vary. Rosemount 1208C Level and Flow Transmitter...
  • Page 73: Dimensional Drawings

    Specifications and reference data 00809-0200-7062 March 2023 A.4  Dimensional drawings Related information Type 1 Drawing A.4.1  Transmitter Figure A-2: Rosemount 1208C Ø 3.11 (79) 4.84 3.86 (123) (98) 0.79 (20) 0.13 (3) A. NPT 1½-in. or ISO 228/1-G1½-in. thread B. M12 male connector (A-coded) C.
  • Page 74 Dimensions are in inches (millimeters). Figure A-5: Extendable Version A. For 1- to 2-in. nominal pipe sizes; 2-in. pipe is the recommended size B. Adjustable length: 17.5 to 28.9 in. (445 to 735 mm) Rosemount 1208C Level and Flow Transmitter...
  • Page 75 Reference Manual Specifications and reference data 00809-0200-7062 March 2023 Bracket hole pattern Figure A-6: Hole Pattern for Wall Mounting 3.23 (82) Ø 0.28 (7) 2.44 (62) Dimensions are in inches (millimeters). Reference Manual...
  • Page 76: Appendix B Configuration Parameters

    The address range is 0 to 63. The transmitter operates in either standard mode with a 4–20 mA output signal or in multidrop. When the transmitter is in multi-drop mode, the current output is fixed to 4 mA. Rosemount 1208C Level and Flow Transmitter...
  • Page 77 Reference Manual Configuration parameters 00809-0200-7062 March 2023 Variable mapping Up to four device variables can be assigned for the HART protocol. The transmitter outputs a 4-20 mA signal proportional to the primary variable. Additional variables are available through the HART digital signal. Related information Output variables Damping value...
  • Page 78 Related information Analog signal on alarm High/low saturation value The device will continue to set a current that corresponds with the measurement until reaching the upper/lower limit (and then freeze). Related information Analog saturation levels Rosemount 1208C Level and Flow Transmitter...
  • Page 79 Reference Manual Configuration parameters 00809-0200-7062 March 2023 B.2.4  Security Write protection The transmitter can be write protected to prevent unauthorized changes. B.2.5  Device information Identifier of up to 8 characters for the device used by host system. The tag is typically a reference number, location, or duty description.
  • Page 80: Level Setup

    If the Zero Level is not located at the tank bottom, then enter a Bottom Offset. It is needed for the transmitter to know the position of the tank bottom. Rosemount 1208C Level and Flow Transmitter...
  • Page 81 Reference Manual Configuration parameters 00809-0200-7062 March 2023 Figure B-4: Bottom Offset A. Device Reference Point B. Reference Height C. Zero Level D. Bottom Offset Show negative level as zero When this setting is selected and the product surface is at or below Zero Level, the level measurement output will be zero.
  • Page 82 Advanced Calibration offset Difference between surface distance measured by transmitter and the same distance measured by, for example, hand-dipping with a measurement tape. A positive Calibration Offset value will increase the presented level value. Rosemount 1208C Level and Flow Transmitter...
  • Page 83 Reference Manual Configuration parameters 00809-0200-7062 March 2023 Figure B-5: Calibration Offset A. Positive Calibration Offset value B. Negative Calibration Offset value C. Reported level D. Actual level Upper null zone The Upper Null Zone defines how close to the device's reference point a level value is accepted.
  • Page 84 (e.g. due to process conditions such as foam or turbulence) until it is annunciated. If measurement is recovered within the time specified by this parameter, then it will not be annunciated. Rosemount 1208C Level and Flow Transmitter...
  • Page 85 Reference Manual Configuration parameters 00809-0200-7062 March 2023 Reference Manual...
  • Page 86 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.

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