Reference Manual 00809-0100-4418, Rev AA September 2022 Rosemount™ 3408 Level 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.
WARNING Repair, e.g. substitution of components, etc. may jeopardize safety and is under no circumstances allowed. Unauthorized changes to the product are strictly prohibited as they may unintentionally and unpredictably alter performance and jeopardize safety. Unauthorized changes that interfere with the integrity of the welds or flanges, such as making additional perforations, compromise product integrity and safety.
Reference Manual 00809-0100-4418 Contents September 2022 Contents Chapter 1 Introduction.............................................................................................................. 7 1.1 Using this manual........................................................................................................................ 7 1.2 NAMUR NE 53 revision history......................................................................................................7 1.3 Product certifications..
Contents September 2022 Reference Manual 00809-0100-4418 5.9 Multidrop communication......................................................................................................... 43 ® ™ 5.10 Use with the Rosemount 333 HART Tri-Loop ........................................................................43 5.11 Write protection...................................................................................................................... 44 Chapter 6 Operation and maintenance..........
Reference Manual 00809-0100-4418 Introduction September 2022 1 Introduction 1.1 Using this manual The sections in this manual provide information on installing, operating, and maintaining the Rosemount™ 3408 Level 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 September 2022 1.3 Reference Manual 00809-0100-4418 Product certifications See the Rosemount 3408 Product Certifications document for detailed information on the existing approvals and certifications. 1.4 Open source licenses This device uses open source software. Further information can be found in the License Information document available at Emerson.com/Rosemount. 1.
Reference Manual 00809-0100-4418 Transmitter overview September 2022 2 Transmitter overview 2.1 Measurement principle The Rosemount 3408 is a two-wire transmitter for continuous level measurements using fast-sweep Frequency Modulated Continuous Wave (FMCW) technology. The transmitter continuously emits signal sweeps with a constantly varying frequency towards the product surface.
Transmitter overview September 2022 2.2.2 Reference Manual 00809-0100-4418 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.
Reference Manual 00809-0100-4418 2.4.1 Transmitter overview September 2022 Application examples Storage tanks Ensure correct filling and storage levels in your tanks. Mixing tanks Gain insights into your process and ensure production runs smoothly without interruption. Open air applications Get reliable level measurements of sumps or ponds, regardless of challenging surface and weather conditions.
Transmitter overview September 2022 Reference Manual 00809-0100-4418 Safety applications The Rosemount 3408 is suitable for safety applications such as overfill prevention, dry-run prevention, or level range monitoring. SIL 2 2.5 Components of the transmitter Figure 2-2: Components A B C G D H E A. B. C. D. E. F. G. H. I. I F LCD display (optional) Two cable/conduit entries (½-14 NPT or M20 x 1.
Reference Manual 00809-0100-4418 2.6 Transmitter overview September 2022 System integration The transmitter is loop-powered, and uses the same two wires for power supply and output signal. The output is a 4-20 mA analog signal superimposed with a digital HART® signal. By using the optional Rosemount 333 HART Tri-Loop™, the digital HART signal can be converted into three additional 4-20 mA analog signals. With the HART protocol, multidrop configuration is possible.
Transmitter overview September 2022 14 Reference Manual 00809-0100-4418 Emerson.
Reference Manual 00809-0100-4418 Mechanical installation September 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 September 2022 Reference Manual 00809-0100-4418 WARNING Process leaks could result in death or serious injury. Ensure that the transmitter is handled carefully. If the process seal is damaged, gas might escape from the tank. 3.2 Confirm approval type For hazardous locations transmitters labeled with multiple approval types: Procedure Permanently mark the checkbox of the selected approval type. Figure 3-1: Label with Multiple Approval Types 3.
Reference Manual 00809-0100-4418 Mechanical installation September 2022 Figure 3-2: Recommended Mounting Position L 3.3.2 Free space requirements If the transmitter is mounted close to a wall or other tank obstruction such as heating coils and ladders, noise might appear in the measurement signal. See Table 3-1 for recommended clearance. Figure 3-3: Free Space Requirements L Table 3-1: Distance to Tank Wall (L) Minimum Recommended 8 in.
Mechanical installation September 2022 3.3.3 Reference Manual 00809-0100-4418 Inclination The transmitter should be mounted vertically to ensure a good echo from the product surface. See Figure 3-4 for recommended maximum inclination. Figure 3-4: Inclination Max. 3° 90° 3.3.4 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. 18 Emerson.
Reference Manual 00809-0100-4418 3.3.5 Mechanical installation September 2022 Beam angle and beam width The transmitter should be mounted with as few internal structures as possible within the signal beam. Figure 3-5: Beam Angle and Beam Width D W Table 3-2: Beam Angle Antenna type Beam angle (α) Process seal antenna 8° Lens antenna (¾-in. thread) 12° Lens antenna (1- and 1½-in. threads) 9° ATAP lens antenna 8° Beam width See Table 3-3 for beam width at different distances.
Mechanical installation September 2022 3.3.6 Reference Manual 00809-0100-4418 Nozzle requirements To allow the microwaves to propagate undisturbed, the nozzle dimensions should be kept within the specified limits as given in Table 3-4. The inside of the nozzle must be smooth (i.e. avoid bad welding, rust, or deposit). Figure 3-6: Mounting in Nozzles H D Table 3-4: Nozzle Requirements Nozzle diameter (D) Maximum nozzle height (H) 1 in. (25 mm)(1) 3.9 in. (100 mm) 1.5 in. (40 mm) 5.9 in.
Reference Manual 00809-0100-4418 Mechanical installation September 2022 3.4 Mount the process seal antenna 3.4.1 Mount the flanged version Procedure 1. Lower the transmitter into the nozzle. Note Be careful not to scratch or otherwise damage the PTFE sealing. 2. Tighten the bolts and nuts (see Table 3-5). Note • Re-tighten after 24 hours and again after the first temperature cycle. • Check at regular intervals and re-tighten if necessary. 3.4.
Mechanical installation September 2022 Reference Manual 00809-0100-4418 • Standard mating metal flange • A193 B8M Cl.2 / A4-70 bolt material • Friction coefficient of μ=0.16 Low strength bolt and non-metallic mating flange may require lower tightening torque. Table 3-5: Torque Values for Process Seal Antenna, lb-ft (N-m) Process connection size Process connection rating ASME B16.5 EN1092-1 JIS B2220 Class 150 Class 300 PN16 PN40 10K 20K 2-in.
Reference Manual 00809-0100-4418 Mechanical installation September 2022 2. Mount the transmitter on the tank. Example • (A) Threaded fitting • (B) Threaded flange 46 mm / 50 mm A B Note Be careful not to scratch or otherwise damage the PTFE sealing. 3.5.2 Mount on BSPP (G) threaded connections Procedure 1. Place a suitable gasket on the tank nozzle.
Mechanical installation September 2022 Reference Manual 00809-0100-4418 2. Mount the transmitter on the tank. 46 mm / 50 mm A B Note Be careful not to scratch or otherwise damage the PTFE sealing. 3.6 Mount the ATAP lens antenna 3.6.1 Open air installations The antenna extension must be fitted to the transmitter to comply with open air requirements. Figure 3-7: Antenna Extension 3.6.2 Mount the bracket Prerequisites Mount the bracket so that it is not susceptible to vibration. 24 Emerson.
Reference Manual 00809-0100-4418 Mechanical installation September 2022 Procedure 1. Mount the bracket to the pipe/wall. Example 14 mm 2. Mount the adapter. 14 mm 3. Secure the transmitter to the adapter.
Mechanical installation September 2022 3.6.3 Reference Manual 00809-0100-4418 Mount on 1½-in. BSPP (G) threaded connections Procedure 1. Place a suitable gasket on the tank nozzle. Example • (A) Threaded fitting • (B) Threaded flange A B 2. Mount the transmitter on the tank. 50 mm A 26 B Emerson.
Reference Manual 00809-0100-4418 3.7 Mechanical installation September 2022 Rotate the transmitter housing To improve field access to wiring or to better view the optional LCD display: Procedure 1. Loosen the set screw. H2.5 mm 2. Rotate the transmitter housing to the desired location, and then retighten the set screw. H2.
Mechanical installation September 2022 28 Reference Manual 00809-0100-4418 Emerson.
Reference Manual 00809-0100-4418 Electrical installation September 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 September 2022 Reference Manual 00809-0100-4418 WARNING Process leaks could result in death or serious injury. Ensure that the transmitter is handled carefully. If the process seal is damaged, gas might escape from the tank. 4.2 Hazardous areas When the transmitter is installed in hazardous areas, local regulations, and specifications in applicable certificates must be observed. Related information Product certifications 4.3 Prepare the electrical connections 4.3.
Reference Manual 00809-0100-4418 Electrical installation September 2022 Transmitter housing The most effective grounding method is direct connection to earth ground with minimal impedance. There are two grounding screw connections provided (see Figure 4-1). Figure 4-1: Ground Screws B A A. Internal ground screw B. External ground screw Cable shield grounding Make sure the instrument cable shield is: • Trimmed close and insulated from touching the transmitter housing.
Electrical installation September 2022 4.3.5 Reference Manual 00809-0100-4418 Power supply The transmitter operates on max. 35 Vdc transmitter terminal voltage and max. 22.5 mA (max. 30 Vdc in Intrinsically Safe installations). 4.3.6 Load limitations For HART® communication, a minimum loop resistance of 250 Ω is required. Maximum loop resistance (R) is determined by the voltage level of the external power supply (UE): UE (Vdc) R (Ω) ≥ 15.6 R = 44.4 × (UE − 12) < 15.
Reference Manual 00809-0100-4418 4.4 Electrical installation September 2022 Connect wiring and power up Procedure 1. Verify the power supply is disconnected. 2. Remove the cover. 3. Remove the LCD display (if fitted). 4. Remove the plastic plugs. 5. Pull the cable through the cable gland/conduit. Identification of thread size and type: NPT M20 ½-14 NPT M20 x 1.
Electrical installation September 2022 Reference Manual 00809-0100-4418 6. Connect the cable wires. 0.3 in. (8 mm) Note When connecting a flexible (stranded) conductor, use a small screwdriver to press down and hold the terminal connection open. 7. Ensure proper grounding. 8. Tighten the cable gland. Apply PTFE tape or other sealant to the threads. Note Make sure to arrange the wiring with a drip loop. 34 Emerson.
Reference Manual 00809-0100-4418 Electrical installation September 2022 9. Seal any unused port with the enclosed metal plug. Apply PTFE tape or other sealant to the threads. 10. Snap the LCD display into place. 11. Attach and tighten the cover. a) Verify the cover jam screw is completely threaded into the housing. H2.
Electrical installation September 2022 Reference Manual 00809-0100-4418 b) Attach and tighten the cover. Note Make sure the cover is fully engaged. There should be no gap between the cover and the housing. c) Turn the jam screw counterclockwise until it contacts the cover. Note Required for explosion-proof/flameproof installations only. H2.5 mm d) Turn the jam screw an additional ½ turn counterclockwise to secure the cover. 12. Connect the power supply. 4.5 Optional devices 4.5.
Reference Manual 00809-0100-4418 Electrical installation September 2022 Figure 4-5: Example Installation of Rosemount 333 with Rosemount 3408 QV TV SV B C PV A A. B. C. D.
Electrical installation September 2022 38 Reference Manual 00809-0100-4418 Emerson.
Reference Manual 00809-0100-4418 Configuration September 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 September 2022 Reference Manual 00809-0100-4418 WARNING Process leaks could result in death or serious injury. Ensure that the transmitter is handled carefully. If the process seal is damaged, gas might escape from the tank. 5.2 Overview This chapter provides information about configuration and configuration tools. Appendix Configuration parameters provides extended information about the configuration parameters. 5.
Reference Manual 00809-0100-4418 5.5.1 Configuration September 2022 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. Start AMS Device Configurator. 2. At the top left, click the menu icon and select Add Device Package. 3. Browse to the downloaded FDI Package and select Open. 4.
Configuration September 2022 Reference Manual 00809-0100-4418 5.7 Wireless configuration via Bluetooth® technology 5.7.1 Download the AMS Device Configurator Procedure Download and install the app from your app store. Related information Emerson.com/AMSDeviceConfigurator 5.7.2 Configure via Bluetooth® wireless technology Procedure 1. Launch AMS Device Configurator. 2. Click on the device you want to connect to. 3. On first connection, enter the key for this device. 4.
Reference Manual 00809-0100-4418 5.8 Configuration September 2022 Run verify level The Verify Level tool matches the product level reported by the device to a reference measurement (for example hand-dipping with a measurement tape). If any difference, the Calibration Offset parameter will be adjusted. A minor adjustment using Calibration Offset is normal. There may, for example be a deviation between the actual tank height and the configured value. Verify Level may also be run in an empty tank.
Configuration September 2022 Reference Manual 00809-0100-4418 Prerequisites The operational mode on the Rosemount 3408 must be set to Control/Monitoring when used with the Rosemount 333 HART Tri-Loop. Burst Mode configuration is possible via host systems supporting Device Descriptors (DD). Procedure 1. Make sure the transmitter is properly configured. 2. If desired, change the measurement units. a) Select Configure → Manual Setup → Device Setup → Units. 3.
Reference Manual 00809-0100-4418 Configuration September 2022 Procedure 1. Select Overview → Device Information → Alarm and Security. 2. Under Security, select Change Write Protection and follow the on-screen instructions. 5.11.2 Set the position of the security switch The security switch is located inside the transmitter housing (accessible after removing the housing cover and display unit). Procedure Slide the security switch to the preferred position.
Configuration September 2022 46 Reference Manual 00809-0100-4418 Emerson.
Reference Manual 00809-0100-4418 Operation and maintenance September 2022 6 Operation and maintenance 6.1 Variable screens The transmitter can display the following variables: Table 6-1: LCD Display Variables Parameter Presentation on display Description Level LEVEL The current level measurement value. Distance DISTANCE Distance from the upper reference point to the product surface. Level rate LEVEL RATE The current velocity at which the level is moving.
Operation and maintenance September 2022 6.2 Set up the LCD display 6.2.1 Select the display variables Reference Manual 00809-0100-4418 It is possible to specify the variables to be presented on the optional LCD display. Procedure 1. Select Configure → (Manual Setup) → Device Setup → Display. 2. Select the desired variables to be displayed on the LCD display. 6.2.2 Change the display language Procedure 1. Select Configure → (Manual Setup) → Device Setup → Display. 2.
Reference Manual 00809-0100-4418 6.3 Operation and maintenance September 2022 View measurement data Procedure 1. Select Overview → Primary Variables. Figure 6-1: Overview Screen in Rosemount Radar Master Plus 2. Optional: Select Overview → All Variables (Service Tools → Variables in DD). 6.3.
Operation and maintenance September 2022 6.4 Reference Manual 00809-0100-4418 Check device status The device reports diagnostic alerts when there is a device malfunction. Procedure 1. Go to the Overview screen to view the overall device status. 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 6.4.
Reference Manual 00809-0100-4418 Operation and maintenance September 2022 Table 6-3: Device Status Images in UIP Device status image Category Description Action Good No active alert. N/A Failure At least one Failure alert is active. Click the device status image to open a window with active alerts together with recommended actions. Function Check At least one Function Check alert is active (and no Failure alerts). 6.
Operation and maintenance September 2022 Reference Manual 00809-0100-4418 2. Select Configure Smart Echo. 3. In the Smart Echo Level box, enter the desired value. 4. Select Save. 6.5.2 Perform a smart echo level test During the test, a virtual surface echo is superimposed onto the radar signal, and the transmitter will output a level corresponding to the echo position.
Reference Manual 00809-0100-4418 Operation and maintenance September 2022 The Smart Meter Verification functionality can be scheduled to run at defined intervals, or it can be initiated on demand. 6.6.1 Perform smart meter verification Procedure 1. Select Service Tools → Maintenance → Smart Meter Verification. 2. Under Manual Verification, select Perform Verification and follow the on-screen instructions. 6.6.2 Schedule automatic verification Procedure 1.
Operation and maintenance September 2022 54 Reference Manual 00809-0100-4418 Emerson.
Reference Manual 00809-0100-4418 Service and troubleshooting September 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 September 2022 Reference Manual 00809-0100-4418 WARNING Process leaks could result in death or serious injury. Ensure that the transmitter is handled carefully. If the process seal is damaged, gas might escape from the tank. 7.2 Diagnostic messages per NAMUR NE 107 7.2.1 Electronics failure, transmitter Category Failure Cause An electronics error has occurred. The device measurement reading is invalid. Recommended actions 1. Restart the device. 2.
Reference Manual 00809-0100-4418 7.2.3 Service and troubleshooting September 2022 Device memory failure Category Failure Cause A device memory error has occurred. The device measurement reading is invalid. 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 7.2.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Restart the device Configure transmitter using guided setup 7.2.6 Software error Category Failure Cause The software in the device encountered a problem and stopped running which may cause an invalid measurement reading. In some cases, problems may be caused by temporary environmental conditions (e.g. electromagnetic interferences) and not observed again. Recommended actions 1. Restart the device. 2.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Amplitude threshold Measurement recovery time Restart the device Restore to default settings Configure transmitter using guided setup 7.2.8 Configuration error Category Failure Cause The device has detected a configuration error. Reasons may be multiple. Recommended actions 1. Click the Details button for more information. 2. Correct the parameter causing the error.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 2. Check the number of table points to use is correct. 3. If condition persists, restore default settings, and reconfigure the device. Related information Scaled variable Restore to default settings Configure transmitter using guided setup Geometry configuration error Cause The configured tank geometry results in a too large level measuring range for this device. Recommended actions 1.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Related information Restore to default settings Configure transmitter using guided setup Threshold configuration error Cause The surface threshold configuration is incorrect. Recommended actions in UIP 1. Adjust the threshold as necessary. 2. If condition persists, restore default settings and reconfigure device. Recommended actions in DD 1.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 SIS configuration error Cause It is currently not possible to enable Safety Mode due to other active alerts. Recommended actions 1. Clear other active alerts by priority order until this alert is cleared. 2. Change Operational Mode to Control/Monitoring if device is not intended to be used as safety device. 3. If the condition persists, restore default settings and reconfigure device.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Related information Antenna type Antenna type not configured Cause The Antenna Type has not been configured. Recommended actions 1. Check configuration of Antenna Type. 2. Make sure the configured antenna type matches the physical antenna for the device. Related information Antenna type Factory calibration error Cause The factory calibration in the device is missing.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Related information Calibrate analog out SIS multidrop error Cause HART multidrop mode is not supported for safety (SIS) devices. Only 4-20 mA output is supported for safety devices. Recommended actions 1. Disable multidrop mode. 2. Change Operational Mode to Control/Monitoring if device is not intended to be used as safety device. 3. If the condition persists, restore default settings and reconfigure device.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Restore to default settings Configure transmitter using guided setup Start code configuration error Cause The start code to enable options in the device is invalid. Note Start codes are unique for individual devices and cannot be copied from one device to another. Recommended actions 1. Enter a valid start code for this device using the Upgrade function. 2.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Related information Use the simulation mode Restart the device 7.2.11 Electronics temperature out of limits Category Out of Specification Cause The temperature of the electronics board has exceeded the transmitter’s operating range. Recommended actions 1. Verify ambient temperature is within the operating range. 2. Remote mount the transmitter away from the process and environmental conditions.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 4. If not needed, disable this alert. Related information High/low user defined alert 7.2.14 Low user defined alert Category Maintenance Required Cause The user defined variable is below the defined limit. Recommended actions 1. Bring the system to a safe state. 2. Verify that the process variable is within specified limits. 3. Reconfirm the user defined alarm limit. 4. If not needed, disable this alert.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Cause The dielectric constant estimation is degraded. Accuracy of level measurement may be degraded. Recommended actions 1. Check configuration of Bottom Product Dielectric Constant. 2. Check configuration of Reference Height and Bottom Offset. 3. If not needed, disable Tank Bottom Projection. Related information Tank bottom projection Reference height Bottom offset 7.2.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Bluetooth electronics error Cause Device internal diagnostics detected a Bluetooth electronics error. This error will likely result in reduced or no Bluetooth communication capability; the field device will continue to function independent of this Bluetooth alert. Recommended actions 1. Restart the device. 2. Replace Bluetooth display.
Service and troubleshooting September 2022 7.3.1 Reference Manual 00809-0100-4418 Troubleshooting incorrect level readings 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). • Run Verify Level to adjust level measurement.
Reference Manual 00809-0100-4418 Service and troubleshooting September 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 • Use the suppress false echoes function to manage strong disturbance echoes. • Analyze the echo curve and check amplitude thresholds. • Remove the disturbing object. • Put an inclined metal plate on top of the disturbing object.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 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 • Use the suppress false echoes function to manage strong disturbance echoes. • Analyze the echo curve and check amplitude thresholds. • Increase the Upper Null Zone. • Remove the disturbing object. • Move the transmitter to another position.
Reference Manual 00809-0100-4418 Service and troubleshooting September 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 September 2022 Reference Manual 00809-0100-4418 Measured value jumps to a lower value Figure 7-5: Symptom A B C D A. B. C. D. Level Time Actual level Reported level Possible cause Multiple products in the tank, e.g. thin oil layer on top of water that is sometimes detected, sometimes not. Recommended actions • Set Double Surface Handling to Track Upper Surface or Track Lower Surface. Related information Double surface handling 74 Emerson.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Measured level fluctuates Figure 7-6: 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. • Enable the Foam parameter or Turbulent Surface parameter, or both.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Measured level is occasionally unstable Figure 7-7: 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. Related information Read the echo curve 76 Emerson.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Lagging of measured level Symptom Measured level lags during rapid level changes. Figure 7-8: 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. Possible cause Maximum Level Rate value too low.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Incorrect level at 100% (20 mA) Symptom Measured level is correct at 0% (4 mA) but incorrect at 100% (20 mA). Figure 7-9: 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. Related information Upper/lower range value 78 Emerson.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Incorrect level when product surface is above 50% Symptom The reported level is incorrect when the product surface is above the 50% level. Figure 7-10: 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 • Enable the Double Bounce Handling function.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Dropping of level close to tank bottom Symptom Measured value drops to zero level in the tank bottom region. Figure 7-11: 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.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Level measurement lost in a manway cover installation Symptom The transmitter reports "Level measurement lost" when opening/closing the manway cover. Figure 7-12: 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.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 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 7-13: 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.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Alarm mode close to tank bottom Symptom When the product surface is near the sloped tank bottom, the transmitter enters alarm mode. Figure 7-14: 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. Recommended actions • Verify the tank geometry parameters are configured correctly (especially the Reference Height and Bottom Offset).
Service and troubleshooting September 2022 7.3.2 Reference Manual 00809-0100-4418 Troubleshooting the 4-20 mA/HART output Device milliamp reading is zero Recommended actions 1. Verify power is applied to signal terminals. 2. Verify power supply voltage is adequate at signal terminals. 3. Verify device and power supply are properly grounded. Related information Power supply Grounding Device milliamp reading is too low or high Recommended actions 1. Verify level. 2.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Device will not respond to changes in level Recommended actions • Verify level is between the 4 and 20 mA set points. • Verify output is not in alarm condition. • Verify device is not in loop test or simulation mode. Related information Upper/lower range value Alarm mode Check device status There is no HART communication (lost device communication) Recommended actions 1.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Figure 7-15: Echo Curve When connected to Rosemount Radar Master Plus, past measurement records and echo curves including the 10 highest peaks, as well as the 50 last alert events are automatically transferred from the transmitter’s internal memory to the hard drive on your local computer. Past measurement records are then available the next time you connect to the transmitter using the level trend timeline.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Table 7-1: Echo Peak Types Type Description Surface Echo tracked as the current surface echo Unknown Echo not recognized by the device, which might interfere with measurement Suppressed Echoes that are identified but suppressed by the device Suppressed (double bounce) Echo managed as a double bounce echo by the Double Bounce function Secondary surface Echo tracked as the current secondary surface (if Double Surface Hand
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Zoom in and out the echo curve You can zoom in to a specific area of the echo curve. Procedure • To zoom in, drag a rectangle around the area you want to magnify. • To zoom out, in the upper right corner of the echo curve, select Reset Zoom. Level trend timeline Figure 7-17: Timeline A A. B. C. D. E. F. G. H.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Play echo curve movies Procedure 1. Set the start point. a) Click the left or right arrow, or drag anywhere in the timeline. b) Click the start point in the timeline. 2. Select Play, or drag the timeline slider to move one frame at a time. Export echo curve movies Procedure 1. Select Service Tools → Echo Curve. 2. Select Export. 3. Type your desired file name. 4. Browse to the desired directory, and then select Save. 5.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Set timeline resolution To set the resolution of the level trend timeline: Procedure 1. Select Service Tools → Echo Curve. 2. Select Options. 3. In the Timeline Resolution list, select the desired length (in hours) of the timeline. 4. Select Save. 5. Select Back. 7.4.2 Perform an analog loop test During a loop test, the transmitter outputs a fixed value (4 mA, 20 mA, or user-selected value).
Reference Manual 00809-0100-4418 7.4.4 Service and troubleshooting September 2022 Save a backup file of the device configuration When configuration is finished, it is recommended to store the device configuration in a backup file for future reference. A backup of the device configuration will be saved to file as well as a configuration report (optional). The backup file may be useful to: • Restore the configuration of the transmitter. • Install another transmitter in a similar tank.
Service and troubleshooting September 2022 7.4.7 Reference Manual 00809-0100-4418 Restore to default settings This function restores the transmitter to default settings (user configuration is overwritten). Prerequisites Before restoring the transmitter to default settings, it is recommended to backup the device configuration. The backup file can be used to restore configuration at a later stage. Procedure 1. Select Service Tools → Maintenance → Reset/Restore. 2.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 2. Type the desired register number to start reading from. In Rosemount Radar Master Plus, registers can also be viewed by selecting a group from the Block list. 3. Select Read Input Registers (Refresh in Rosemount Radar Master Plus). 4. (Handheld communicator) Select Input Registers. 7.4.
Service and troubleshooting September 2022 7.5 Application challenges 7.5.1 Managing disturbance echoes Reference Manual 00809-0100-4418 There are two general methods for managing disturbance echoes: • Set amplitude threshold to filter out weak disturbance echoes and noise. • Use the suppress false echoes function to manage strong disturbance echoes. Amplitude threshold The amplitude threshold is used to filter out noise and disturbing echoes from the product surface echo.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 2. In the echo curve, drag the amplitude threshold point left or right, or type the desired value. Figure 7-18: Amplitude Threshold Point 3. Select Save. Set the endpoint of a threshold segment Procedure 1. In the echo curve, drag the endpoint up or down, or type the desired value. Figure 7-19: Endpoint 2. Select Save. Add or delete an amplitude threshold point Procedure 1.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 2. Click again on one of the amplitude threshold points and select Save. Suppressing false echoes Stationary objects with horizontal surfaces may generate strong false echoes. When the surface is close to an obstruction in the tank (e.g. beams and agitators), the surface and false echoes might interfere and cause a decrease in performance.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 • Only suppress echoes which can be clearly identified as objects in the tank. Compare the list of interfering echoes with the tank drawing or visual inspection of the tank. • Do not suppress false echoes located below the product surface. • Keep the number of suppressed false echoes to a minimum. It is recommended to suppress false echoes using Rosemount Radar Master Plus. Procedure 1. Select Service Tools → Echo Curve. 2.
Service and troubleshooting September 2022 2. In the echo curve, click select Delete. Reference Manual 00809-0100-4418 at the left end of the false echo suppression, and then Figure 7-22: Delete False Echo Suppression Suppress a false echo manually The false echo may also be suppressed manually if the position of the false echo is known. Prerequisites It is recommended to suppress false echoes using Rosemount Radar Master Plus. Procedure 1. Select Service Tools → Echo Curve. 2. Select Options. 3.
Reference Manual 00809-0100-4418 7.5.2 Service and troubleshooting September 2022 Handling disturbances at top of tank Change the upper null zone The Upper Null Zone defines a zone close to the transmitter where echoes are ignored. This zone can be extended to block out disturbing echoes at the top of the tank. Prerequisites Note Make sure the Upper Range Value (100%/20 mA) value is below the Upper Null Zone. Measurements are not performed within the Upper Null Zone. Procedure 1.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 Figure 7-23: Tank Bottom Projection $ $ & ' % A. B. C. D. % Level Time Enabled Disabled Prerequisites The Tank Bottom Projection function is only available in Rosemount Radar Master Plus. Procedure 1. Select Configure → Level Setup → Advanced. 2. Under More Advanced Options, select Empty Tank Handling. 3. In the Tank Bottom Projection list, select Enabled or Disabled. 4.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 disturbance echo to facilitate tracking of weak surface echoes close to the tank bottom. This function may be useful for products which are relatively transparent for microwaves, such as oil. Figure 7-24: Bottom Echo Visible A B C C E E F D D A. B. C. D. E. F.
Service and troubleshooting September 2022 Reference Manual 00809-0100-4418 5. Select Save. 7.5.4 Handling strong double bounce echoes Double bounces are most commonly present in spherical or horizontal cylinder tanks, and usually appear when the tank is about 60-70 percent filled. In these cases, the amplitude may be strong enough for the transmitter to interpret the double bounce as the surface echo. The Double Bounce Handling function is used for managing such problems.
Reference Manual 00809-0100-4418 Service and troubleshooting September 2022 Note The surface echo is required to suppress the double bounce. If the surface echo enters the Upper Null Zone, there is no product surface reference and the double bounce might be interpreted as the surface echo. The Double Bounce Handling function is only available in Rosemount Radar Master Plus. Procedure 1. Read the echo curve plot to determine if double bounce echoes are present. 2. Select Configure → Level Setup → Advanced.
Service and troubleshooting September 2022 104 Reference Manual 00809-0100-4418 Emerson.
