Reference Manual 00809-0100-7062, Rev AA June 2022 Rosemount™ 1208A Level and Flow Transmitter Non-Contacting Radar
Safety messages NOTICE Read this manual before working with the product. For personal and system safety, and for optimum product performance, ensure you thoroughly understand the contents before installing, using, or maintaining this product. For technical assistance, contacts are listed below: Customer Central Technical support, quoting, and order-related questions.
Reference Manual 00809-0100-7062 Contents June 2022 Contents Chapter 1 Introduction.............................................................................................................. 5 1.1 Using this manual........................................................................................................................ 5 1.2 Product certifications...................................................................................................................5 1.3 Open source licenses..
Contents June 2022 Reference Manual 00809-0100-7062 7.5 Service and troubleshooting tools..............................................................................................66 7.6 Service support..........................................................................................................................68 Appendix A Specifications and reference data............................................................................. 71 A.1 Performance specifications.......................
Reference Manual 00809-0100-7062 Introduction June 2022 1 Introduction 1.1 Using this manual The sections in this manual provide information on installing, operating, and maintaining the Rosemount™ 1208A Level and Flow Transmitter – Non-Contacting Radar. The sections are organized as follows: Transmitter overview provides an introduction to theory of operation, a description of the transmitter, information on typical applications, and process characteristics.
Introduction June 2022 6 Reference Manual 00809-0100-7062 Rosemount 1208A Level and Flow Transmitter
Reference Manual 00809-0100-7062 Transmitter overview June 2022 2 Transmitter overview 2.1 Measurement principle The Rosemount 1208A is a transmitter for continuous level measurements using fastsweep Frequency Modulated Continuous Wave (FMCW) technology. The transmitter continuously emits signal sweeps with a constantly varying frequency towards the product surface.
Transmitter overview June 2022 2.2.2 Reference Manual 00809-0100-7062 Foam and turbulence Foaming liquids or turbulence may cause weak and varying surface echo amplitudes. Surface turbulence is not normally a problem unless it is excessive. Measurement in foamy applications depends largely on the foam properties. When the foam is light and airy, the actual product level is measured. For heavy and dense foam, the transmitter may measure the level of the foam’s upper surface. 2.
Reference Manual 00809-0100-7062 Transmitter overview June 2022 Plastic tanks Monitor the inventory of your small and medium sized plastic tanks by measuring through the plastic roof. Open air applications Get reliable level measurements of sumps or ponds, regardless of challenging surface and weather conditions. Open channel flow Use the Rosemount 1208A for volume flow measurement of water and wastewater in open channels.
Transmitter overview June 2022 2.5 Reference Manual 00809-0100-7062 Components of the transmitter Figure 2-2: Components A B C D E A. B. C. D. E. M12 connector (A-coded) Transmitter housing Gasket NPT 1½-in. or ISO 228/1-G1½-in. thread Antenna Related information Dimensional drawings 2.6 Easy integration with IO-Link The Rosemount 1208A provides both conventional 4-20 mA and digital switch outputs, enabled by IO-Link connectivity. This supports easy integration into any automation system.
Reference Manual 00809-0100-7062 Transmitter overview June 2022 Figure 2-3: Example of an IO-Link System A B C D E A. B. C. D. E.
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Reference Manual 00809-0100-7062 Mechanical installation June 2022 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 ( ). Refer to the following safety messages before performing an operation preceded by this symbol.
Mechanical installation June 2022 Reference Manual 00809-0100-7062 • The transmitter should be mounted with as few internal structures as possible within the signal beam. • Do not mount close to or above the inlet stream. • Do not mount the transmitter on a manway cover. • Do not position the transmitter directly over a side manway door. • Multiple Rosemount 1208A transmitters can be used in the same tank without interfering with each other. Figure 3-1: Recommended Mounting Position L 3.2.
Reference Manual 00809-0100-7062 3.2.3 Mechanical installation June 2022 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.
Mechanical installation June 2022 3.2.5 Reference Manual 00809-0100-7062 Beam angle and beam width The transmitter should be mounted with as few internal structures as possible within the signal beam. Figure 3-4: Beam Angle and Beam Width D W Beam angle (α) 8° Beam width See Table 3-2 for beam width at different distances. Table 3-2: Beam Width 16 Distance (D) Beam width (W) 6.6 ft. (2 m) 0.9 ft. (0.3 m) 13.1 ft. (4 m) 1.8 ft. (0.6 m) 19.7 ft. (6 m) 2.8 ft. (0.8 m) 26.2 ft. (8 m) 3.7 ft.
Reference Manual 00809-0100-7062 3.2.6 Mechanical installation June 2022 Nozzle requirements To allow the microwaves to propagate undisturbed, the nozzle dimensions should be kept within the specified limits as given in Table 3-3. The inside of the nozzle must be smooth (i.e. avoid bad welding, rust, or deposit). Figure 3-5: Mounting in Nozzles H D Table 3-3: Nozzle Requirements Reference Manual Nozzle diameter (D) Maximum nozzle height (H) 1.5 in. (40 mm) 5.9 in. (150 mm) 2 in. (50 mm) 7.9 in.
Mechanical installation June 2022 Reference Manual 00809-0100-7062 3.3 Bracket mounting 3.3.1 Mount the standard bracket Procedure 1. Mount the bracket on the pipe/ceiling/wall.
Reference Manual 00809-0100-7062 Mechanical installation June 2022 2. Ensure the adjustable holder is directed toward the ground. T30 90° 3. Install and hand tighten the transmitter.
Mechanical installation June 2022 3.3.2 Reference Manual 00809-0100-7062 Mount the extendable bracket Procedure 1. Mount the bracket on the pipe/wall.
Reference Manual 00809-0100-7062 Mechanical installation June 2022 2. Mount the extendable arm. Do not fully tighten the screws at this stage. T30 3. Install and hand tighten the transmitter.
Mechanical installation June 2022 Reference Manual 00809-0100-7062 4. Connect the M12 cable. 5. Ensure the adjustable holder is properly aligned.
Reference Manual 00809-0100-7062 Mechanical installation June 2022 6. Fold down the arm to a horizontal position. 7. Adjust the length of the arm as necessary. Then tighten the two screws.
Mechanical installation June 2022 Reference Manual 00809-0100-7062 8. Check that the bracket installation is level. To raise or lower the arm, adjust the two level screws. Then tighten the two nuts. T30 10 mm 9. Tighten the two screws.
Reference Manual 00809-0100-7062 Mechanical installation June 2022 3.4 Installing on a tank 3.4.1 Mount the flange Procedure 1. Place a suitable gasket on the tank flange. 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.
Mechanical installation June 2022 Reference Manual 00809-0100-7062 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. Mount the threaded adapter on the tank. 60 mm 3. Apply appropriate thread sealant to the transmitter threads.
Reference Manual 00809-0100-7062 Mechanical installation June 2022 4. Install and hand tighten the transmitter.
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Reference Manual 00809-0100-7062 Electrical installation June 2022 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 ( ). Refer to the following safety messages before performing an operation preceded by this symbol.
Electrical installation June 2022 4.2.3 Reference Manual 00809-0100-7062 Outputs The transmitter provides two configurable outputs: 4.2.4 Output 1 Digital output / IO-Link mode Output 2 Digital output or active 4-20 mA analog output Internal power consumption < 2 W (normal operation at 24 Vdc, no outputs) < 3.6 W (normal operation at 24 Vdc, digital and analog outputs active) 4.2.
Reference Manual 00809-0100-7062 Electrical installation June 2022 Figure 4-2: Example Circuits A 2: OUT2 4: OUT1 B 2: OUT2 4: OUT1 C 2: OUT2 4: OUT1 D 2: OUT2 4: OUT1 A. B. C. D.
Electrical installation June 2022 4.3 Reference Manual 00809-0100-7062 Power up transmitter Procedure 1. Verify the power supply is disconnected. 2. Insert the M12 connector and screw tight. See the manufacturer’s instruction manual for recommended torque. 3. Connect the power supply.
Reference Manual 00809-0100-7062 Configuration June 2022 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 ( ). Refer to the following safety messages before performing an operation preceded by this symbol.
Configuration June 2022 Reference Manual 00809-0100-7062 Figure 5-1: Connection via the IO-Link USB Communicator Figure 5-2: Connection via the IO-Link Master Figure 5-3: Connection via the PLC 5.4 Get started with your preferred configuration tool 5.4.1 IO-Link configuration tools Examples: • Rosemount IO-Link Assistant (available as accessory) • FDT® frame applications, e.g. PACTware 5.4.
Reference Manual 00809-0100-7062 Configuration June 2022 2. In the Vendor list, select Rosemount Inc., and then select the check box for the devices to be installed/updated. Alternatively, browse to an already downloaded IODD zip file, and select Open. 3. Select OK. 5.4.3 FDT®/DTM framework Download the IODD file Procedure 1. Download the IODD from the IODDFinder portal at Ioddfinder.io-link.com. 2. Unzip the IODD package.
Configuration June 2022 Reference Manual 00809-0100-7062 2. Select Add IODD. 3. Browse to the IODD file (.xml) and select Open. 4. Start the configuration tool and update the device catalog. Need help? If the new DTM is not added automatically at start-up, then select View → Device Catalog → Update Device Catalog. 5.5 Perform the basic setup 5.5.1 Set the engineering units Procedure 1. Under Menu, select Parameter → Basic Setup. 2. In the Engineering Units list, select Metric or Imperial. 3.
Reference Manual 00809-0100-7062 Configuration June 2022 Related information Reference height 5.5.3 Configure the analog output The transmitter can be set to output the level or volume flow as a 4-20 mA signal. Procedure 1. Under Menu, select Parameter → OUT2 Analog Output. 2. In the OUT2 Configuration list, select Analog Output 4-20 mA. 3. In the Analog Control Variable list, select Level or Volume Flow. 4. In the Alarm Mode list, select Low Alarm or High Alarm. 5.
Configuration June 2022 Reference Manual 00809-0100-7062 • Linearization table • Parshall flume • Khafagi-Venturi flume 3. Select Volume Flow Table/Formula, and then set the parameters as desired. 4. Select Write to device.
Reference Manual 00809-0100-7062 Operation and maintenance June 2022 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 ( ). Refer to the following safety messages before performing an operation preceded by this symbol.
Operation and maintenance June 2022 Reference Manual 00809-0100-7062 Figure 6-1: Dashboard Need help? Select the Help 6.2.1 6.2.2 button for more information on the features and capabilities. Measurement variables Variable Description Level The current level measurement value (from the Zero Level to the product surface). Distance The distance from the Device Reference Point to the surface. Signal strength The reflected signal strength from the surface.
Reference Manual 00809-0100-7062 6.3 Operation and maintenance June 2022 Enter the demonstration mode In this mode, the signal processing method is optimized for demo situations when simulating a product surface with, for example, a measurement target plate. Note This mode is intended for demonstration purposes only, and should not be used for normal operations.
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Reference Manual 00809-0100-7062 Service and troubleshooting June 2022 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 ( ). Refer to the following safety messages before performing an operation preceded by this symbol.
Service and troubleshooting June 2022 Reference Manual 00809-0100-7062 7.2 Diagnostic messages 7.2.1 Device hardware fault Alarm classification Event Device hardware fault – Device exchange Device status Failure Class Error Possible cause An electronics error has occurred. Recommended actions 1. Restart the device. 2. If the condition persists, replace the device. Related information Perform a device reset 7.2.
Reference Manual 00809-0100-7062 7.2.3 Service and troubleshooting June 2022 General power supply fault Alarm classification Event General power supply fault – Check availability Device status Failure Class Error Possible cause Power supply drops below 18 Vdc during transmitter start-up. Recommended actions Verify voltage is 18-30 Vdc at the transmitter terminal. 7.2.
Service and troubleshooting June 2022 7.2.5 Reference Manual 00809-0100-7062 Device memory failure Alarm classification Event Device memory failure – Restore default settings Device status Failure Class Error Possible cause Configuration data has been corrupted, for example, due to a power loss during writing. Recommended actions 1. Restore default settings, restart device, and reconfigure the device. 2. If the condition persists, replace the device.
Reference Manual 00809-0100-7062 7.2.7 Service and troubleshooting June 2022 Level measurement lost Alarm classification Event Level measurement lost – Check application Device status Failure Class Error Possible cause No valid level reading. Reasons may be multiple: • No valid surface echo peak in the measuring range • Incorrect device configuration Recommended actions 1. Analyze the Echo Peaks and check device configuration, especially General Threshold. 2.
Service and troubleshooting June 2022 7.2.8 Reference Manual 00809-0100-7062 Device temperature over-run Alarm classification Event Device temperature over-run – Clear source of heat Device status Out of specification Class Warning Possible cause The electronics temperature is outside the operating range. Recommended actions 1. Verify ambient temperature is within the operating range. 2. Clear source of heat. Related information Ambient temperature 7.2.
Reference Manual 00809-0100-7062 7.2.10 Service and troubleshooting June 2022 Short circuit Alarm classification Event Short circuit – Check installation Device status Out of Specification Class Error Possible cause Short circuit on the digital output. Recommended actions Check cable and connections. 7.2.
Service and troubleshooting June 2022 7.2.13 Reference Manual 00809-0100-7062 Maintenance required Alarm classification Event Maintenance required - Cleaning Device status Maintenance required Class Notification Possible cause Product build-up on the antenna. Recommended actions Clean the antenna. Use a damp cloth and a mild cleaning agent suitable for the media and wetted parts of the transmitter. Related information Material exposed to tank atmosphere Components of the transmitter 7.2.
Reference Manual 00809-0100-7062 7.2.15 Service and troubleshooting June 2022 Measurement range over-run Alarm classification Event Measurement range over-run – Check application Device status Out of Specification Class Error Possible cause The level measurement is outside the configured range for the volume flow. Recommended actions Ensure that level values within operating range are included in the volume flow table.
Service and troubleshooting June 2022 Reference Manual 00809-0100-7062 7.3 Troubleshooting incorrect level readings 7.3.1 Reported level is too high or low Figure 7-1: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause Incorrect tank geometry configuration. Recommended actions • Verify the tank geometry parameters are configured correctly (especially the Reference Height). • Analyze the Echo Peaks and check General Threshold.
Reference Manual 00809-0100-7062 7.3.2 Service and troubleshooting June 2022 Level is stuck in measuring range Figure 7-2: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause Disturbing object in the tank. Recommended actions • Analyze the Echo Peaks and check General Threshold. • Remove the disturbing object. • Put an inclined metal plate on top of the disturbing object. • Move the transmitter to another position.
Service and troubleshooting June 2022 7.3.3 Reference Manual 00809-0100-7062 Level is stuck in full tank Figure 7-3: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause Disturbing object near the antenna. Recommended actions • Analyze the Echo Peaks and check General Threshold. • Increase the Upper Null Zone. • Remove the disturbing object. • Move the transmitter to another position. Possible cause Product build-up on the antenna. Recommended actions • Clean the antenna.
Reference Manual 00809-0100-7062 7.3.4 Service and troubleshooting June 2022 Level value drops when close to antenna Symptom Level value drops to a lower value when product surface is close to antenna. Figure 7-4: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause 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.
Service and troubleshooting June 2022 7.3.5 Reference Manual 00809-0100-7062 Measured level fluctuates Figure 7-5: Symptom A B C 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.
Reference Manual 00809-0100-7062 7.3.6 Service and troubleshooting June 2022 Measured level is occasionally unstable Figure 7-6: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause The product surface is close to a suppressed false echo. Recommended actions • If possible, remove the disturbing object.
Service and troubleshooting June 2022 7.3.7 Reference Manual 00809-0100-7062 Lagging of measured level Symptom Measured level lags during rapid level changes. Figure 7-7: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause Damping value is set too high. Recommended actions • If there is a problem with lag during rapid level changes, consider decreasing the Damping value.
Reference Manual 00809-0100-7062 7.3.8 Service and troubleshooting June 2022 Incorrect level at 100% (20 mA) Symptom Measured level is correct at 0% (4 mA) but incorrect at 100% (20 mA). Figure 7-8: Symptom A B C D A. B. C. D. Level Time Actual level 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.
Service and troubleshooting June 2022 7.3.9 Reference Manual 00809-0100-7062 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 B C D A. B. C. D. Level Time Actual level Reported level Possible cause A strong double bounce echo is interpreted as the product surface. Recommended actions • Move the transmitter to another position.
Reference Manual 00809-0100-7062 7.3.10 Service and troubleshooting June 2022 Dropping of level close to tank bottom Symptom Measured value drops to zero level in the tank bottom region. Figure 7-10: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause Transmitter has locked on a strong tank bottom echo. Recommended actions • Verify the Reference Height is configured correctly.
Service and troubleshooting June 2022 7.3.11 Reference Manual 00809-0100-7062 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 B C D A. B. C. D. Level Time Actual level 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.
Reference Manual 00809-0100-7062 7.3.12 Service and troubleshooting June 2022 Level measurement is lost in an empty tank Symptom The transmitter reports "Level measurement lost" in an empty tank after closing the side manway door. Figure 7-12: Symptom A F B C D E A. B. C. D. E. F. Level Time Actual level Reported level Level measurement lost Manway door open Possible cause When the manway door is opened inward, it generates a disturbance echo which is interpreted as the product surface echo.
Service and troubleshooting June 2022 7.3.13 Reference Manual 00809-0100-7062 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 B C D A. B. C. D. Level Time Actual level Reported level Possible cause Reduction of projected surface area close to sloping tank bottom.
Reference Manual 00809-0100-7062 7.4.1 Service and troubleshooting June 2022 Adjust the general threshold If necessary, the general threshold value can be increased if a disturbance echo is interpreted as the product surface. Alternatively, a lower threshold may be required to handle weak surface echoes (e.g. due to excessive foaming or turbulence). Prerequisites The general threshold is set at factory for optimum performance and should not normally need an adjustment.
Service and troubleshooting June 2022 Reference Manual 00809-0100-7062 Figure 7-14: Upper Null Zone m A B 3.0 C 2.5 2.0 D 1.5 E 1.0 0.5 0 0 A. B. C. D. E. 150 300 450 600 750 900 mV Upper Null Zone Disturbance echo 100% (20 mA) General threshold Product surface echo Related information Upper null zone 7.5 Service and troubleshooting tools 7.5.1 Analyze the echo peaks Measurement problems can be understood by studying the position and amplitude of the different peaks.
Reference Manual 00809-0100-7062 Service and troubleshooting June 2022 Echo peaks See Table 7-1 for a list of possible echo peaks. Table 7-1: Echo Peak Types 7.5.
Service and troubleshooting June 2022 7.5.5 Reference Manual 00809-0100-7062 Calibrate analog out Use this function to calibrate the analog output by comparing the actual output current with the nominal 4 mA and 20 mA currents. Calibration is done at factory and the analog output does not normally need to be recalibrated. Prerequisites Connect a calibrated ampere meter to the analog output loop. Procedure 1. Under Menu, select Parameter → Service Tools → Analog Out Calibration. 2.
Reference Manual 00809-0100-7062 Service and troubleshooting June 2022 Emerson representatives will explain the additional information and procedures necessary to return goods exposed to hazardous substances.
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Reference Manual 00809-0100-7062 Specifications and reference data June 2022 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) • Relative humidity: 25-75% • Damping: Default value, 2 s Instrument accuracy (under reference conditions) ±0.08 in. (±2 mm)(1) Repeatability ±0.04 in.
Specifications and reference data June 2022 Reference Manual 00809-0100-7062 Accuracy over measuring range Figure A-1 illustrates the accuracy over measuring range at reference conditions. Figure A-1: Accuracy Over Measuring Range ±0.08 (±2) ±0.4 (±10) A B 5.9 (150) C A. Device Reference Point B. Accuracy in inches (millimeters) C. Distance in inches (millimeters) A.1.
Reference Manual 00809-0100-7062 Specifications and reference data June 2022 Related information Product certifications A.2 Functional specifications A.2.1 General Field of application Continuous measurement of level and open channel flow. Minimum dielectric constant 2 Measurement principle Frequency Modulated Continuous Wave (FMCW) Frequency range 77 to 81 GHz Maximum output power 3 dBm (2 mW) Internal power consumption < 2 W (normal operation at 24 Vdc, no outputs) < 3.
Specifications and reference data June 2022 A.2.3 Reference Manual 00809-0100-7062 Digital output Switching signal for high and low limits (using the same pin) Output type PNP/NPN configurable Switching function Normally open Permanent current rating < 50 mA Maximum voltage drop 2.5 V A.2.4 4-20 mA analog output Load limitations Maximum loop resistance is determined by the voltage level of the external power supply: Maximum Loop Resistance = 43.
Reference Manual 00809-0100-7062 Specifications and reference data June 2022 Analog signal on alarm The transmitter automatically and continuously performs self-diagnostic routines. If a failure or a measurement error is detected, the analog signal will be driven offscale to alert the user. High or low failure mode is user-configurable. Table A-1: Signal on Alarm Level Custom levels NAMUR NE43 (default) Low 3.5 to 4.0 mA 3.5 mA (NAMUR ≤ 3.6 mA) High 20.0 to 22.5 mA 21.5 mA (NAMUR ≥ 21.
Specifications and reference data June 2022 A.2.6 Reference Manual 00809-0100-7062 Configuration IO-Link configuration tools Examples: • Rosemount IO-Link Assistant (available as accessory) • FDT® frame applications, e.g. PACTware Damping User selectable (default is 2 s, minimum is 0 s) Output units • Level: in.
Reference Manual 00809-0100-7062 A.2.8 Specifications and reference data June 2022 Temperature limits Process temperature -40 to 176 °F (-40 to 80 °C) Ambient temperature -40 to 176 °F (-40 to 80 °C) Storage temperature -40 °F to 194 °F (-40 °C to 90 °C) A.3 Physical specifications A.3.
Specifications and reference data June 2022 Reference Manual 00809-0100-7062 Ingress protection • IP66/68(4) • Type 4X/6P The stated ingress protection only applies when plugged in using a suitable M12 connector that has the appropriate ingress protection. A.3.3 Mounting bracket Materials • Bracket: Stainless steel 316L • Nut: PVDF A.3.4 Flanges Materials • Polyethylene PE100 • Stainless steel 316/316L • Stainless steel 1.4404 A.3.5 Threaded adapters Materials Stainless steel 316/316L/1.4404 A.3.
Reference Manual 00809-0100-7062 A.4.1 Specifications and reference data June 2022 Transmitter Figure A-3: Rosemount 1208A Ø 3.11 (79) B 4.84 3.86 (123) (98) C A 0.79 (20) 0.13 (3) A. NPT 1½-in. or ISO 228/1-G1½-in. thread B. M12 connector (A-coded) C. Gasket Dimensions are in inches (millimeters). A.4.2 Threaded adapter Figure A-4: 2-in. NTP Threaded Adapter Ø 2.56 (65) 1.46 (37) Dimensions are in inches (millimeters).
Specifications and reference data June 2022 A.4.3 Reference Manual 00809-0100-7062 Mounting brackets Figure A-5: Standard Version 5.20 (132) A 5.91 (150) 4.72 (120) A. For 1- to 2-in. nominal pipe sizes; 2-in. pipe is the recommended size Dimensions are in inches (millimeters). Figure A-6: Extendable Version A B 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.
Reference Manual 00809-0100-7062 Specifications and reference data June 2022 Bracket hole pattern Figure A-7: Hole Pattern for Wall Mounting 3.23 (82) Ø 0.28 (7) 2.44 (62) Dimensions are in inches (millimeters).
Configuration parameters June 2022 Reference Manual 00809-0100-7062 B Configuration parameters B.
Reference Manual 00809-0100-7062 Configuration parameters June 2022 B.2 Basic setup B.2.1 Engineering units Sets the unit of measure for length, temperature, and volume flow. Option Length unit Temperature unit Volume flow unit Metric m °C m3/h Imperial inch °F US gal/h After appropriate units have been selected, all configuration parameters and transmitter variables will be expressed in these units. B.2.2 Reference height Distance between the Device Reference Point and Zero Level.
Configuration parameters June 2022 B.2.3 Reference Manual 00809-0100-7062 Digital output P-n The output polarity for the switching outputs (PnP or nPn). B.2.4 Write protection The transmitter can be software write protected to prevent unintentional configuration changes. B.3 Digital output B.3.1 DO control variable Select between volume flow or level to control the digital output. B.3.
Reference Manual 00809-0100-7062 Configuration parameters June 2022 Options for alarm on delay Table B-1: Alarm On Delay Option Description Always Alarm on delay is always used. Lost surface Alarm on delay is used only for lost surface alarms. This may be useful in applications when there are small and local rapid level changes caused by surface turbulence. Hardware faults and measurement values that exceed the alarm set points will trigger alarm without any delay.
Configuration parameters June 2022 Reference Manual 00809-0100-7062 Low alarm Enable or disable the low alarm. Alarm set points SP1 - High alarm set point If the measured value is above this set point, the digital output is set to alarm state. SP2 - Low alarm set point If the measured value is below this set point, the digital output is set to alarm state. Hysteresis The hysteresis is a buffer zone so the alerts do not toggle on and off when the measurement value fluctuates around the alarm limit.
Reference Manual 00809-0100-7062 Configuration parameters June 2022 Figure B-5: Example of Range Value Settings A B D E C A. B. C. D. E. Reduced accuracy zone 100% (20 mA) Zero Level Level measurement range 0-100% 0% (4 mA) Related information Accuracy over measuring range B.4.3 Alarm mode The transmitter automatically and continuously performs self-diagnostic routines. If a failure or a measurement error is detected, the transmitter drives the output to selected alarm limit (high or low). B.4.
Configuration parameters June 2022 Reference Manual 00809-0100-7062 Related information Analog saturation levels B.5 Geometry B.5.1 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. Figure B-6: Calibration Offset C D A B A. B. C. D.
Reference Manual 00809-0100-7062 Configuration parameters June 2022 Bottom offset The Bottom Offset is defined as the distance between Zero Level and the tank bottom. The default value is zero. 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. Figure B-7: Bottom Offset A B C D + A. B. C. D. Device Reference Point Reference Height Zero Level Bottom Offset B.6 Volume flow B.6.
Configuration parameters June 2022 B.6.2 Reference Manual 00809-0100-7062 Volume flow table The volume flow table is used to convert the measured level into a volume flow rate. Up to 30 level-volume flow pairs can be entered. The level points must be entered in increasing order. B.6.
Reference Manual 00809-0100-7062 B.7.2 Configuration parameters June 2022 Damping value This parameter defines how fast the transmitter reacts to a change of the level value (step response). The default value is 2 seconds. A high value makes the level reading steady, while a low value allows the transmitter to respond to rapid level changes (but the presented level value may be less steady). B.7.
00809-0100-7062 Rev. AA 2022 For more information: Emerson.com ©2022 Emerson. All rights reserved. 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.
