Emerson Rosemount 3408 Reference Manual
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Emerson Rosemount 3408 Reference Manual

Level transmitter, non-contacting radar
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Reference Manual
00809-0100-4418, Rev AA
September 2022
™
Rosemount
3408 Level Transmitter
Non-Contacting Radar

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Summary of Contents for Emerson Rosemount 3408

  • Page 1 Reference Manual 00809-0100-4418, Rev AA September 2022 ™ Rosemount 3408 Level Transmitter Non-Contacting Radar...
  • Page 2 Ensure the transmitter is installed by qualified personnel and in accordance with applicable code of practice. Use the equipment only as specified in this manual. Failure to do so may impair the protection provided by the equipment. For installations in hazardous locations, the transmitter must be installed according to the Rosemount 3408 Product Certifications document and System Control Drawing.
  • Page 3 Equipment ratings and certifications are no longer valid on any products that have been damaged or modified without the prior written permission of Emerson. Any continued use of product that has been damaged or modified without the written authorization is at the customer’s sole risk and expense.

  • Page 5: Table Of Contents

    5.2 Overview........................... 40 5.3 Configuration tools........................40 5.4 Confirm correct device driver.....................40 5.5 Rosemount Radar Master Plus....................40 5.6 Configure transmitter using guided setup................. 41 ® 5.7 Wireless configuration via Bluetooth technology..............42 5.8 Run verify level...........................43 Rosemount 3408 Level Transmitter...
  • Page 6 Specifications and reference data................105 A.1 Performance specifications......................105 A.2 Functional specifications......................107 A.3 Physical specifications......................112 A.4 Dimensional drawings......................113 Appendix B Configuration parameters..................117 B.1 Menu tree..........................117 B.2 Device setup..........................119 B.3 Level setup..........................123 B.4 Alert setup..........................137 Emerson.com/Rosemount...

  • Page 7: Chapter 1 Introduction

    Configuration parameters provides extended information about the configuration parameters. NAMUR NE 53 revision history The Rosemount 3408 meets the NAMUR recommendation NE 53. Table 1-1 provides the information necessary to ensure you have the correct device driver for your device.

  • Page 8: Product Certifications

    Introduction Reference Manual September 2022 00809-0100-4418 Product certifications See the Rosemount 3408 Product Certifications document for detailed information on the existing approvals and certifications. 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 9: Chapter 2 Transmitter Overview

    September 2022 Transmitter overview 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. Since the transmitter continuously changes the frequency of...

  • Page 10: Vessel Characteristics

    The Rosemount 3408 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 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. Rosemount 3408 Level Transmitter...

  • Page 12: Components Of The Transmitter

    Transmitter overview Reference Manual September 2022 00809-0100-4418 Safety applications The Rosemount 3408 is suitable for safety applications such as overfill prevention, dry-run prevention, or level range monitoring. Components of the transmitter Figure 2-2: Components A. LCD display (optional) B. Two cable/conduit entries (½-14 NPT or M20 x 1.5) C.

  • Page 13: System Integration

    F. Approved IS barrier (for Intrinsically Safe installations only) G. Rosemount 333 H. Host/DCS system I. HART modem J. PC with Rosemount Radar Master Plus The Rosemount 3408 is compliant with NAMUR NE 107 Field Diagnostics for standardized device diagnostic information. Rosemount 3408 Level Transmitter...
  • Page 14 Transmitter overview Reference Manual September 2022 00809-0100-4418 Emerson.com/Rosemount...

  • Page 15: Chapter 3 Mechanical Installation

    WARNING Electrical shock could cause death or serious injury. Ensure the mains power to the transmitter is off and the lines to any other external power source are disconnected or not powered while wiring the transmitter. Rosemount 3408 Level Transmitter...

  • Page 16: Confirm Approval Type

    • Do not mount the transmitter on a manway cover. • Do not position the transmitter directly over a side manway door. • Multiple Rosemount 3408 transmitters can be used in the same tank without interfering with each other. Emerson.com/Rosemount...
  • Page 17 See Table 3-1 recommended clearance. Figure 3-3: Free Space Requirements Table 3-1: Distance to Tank Wall (L) Minimum Recommended 8 in. (200 mm) ½ of tank radius Rosemount 3408 Level Transmitter...
  • Page 18 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. Emerson.com/Rosemount...
  • Page 19 5.2 (1.6) 7.0 (2.1) 49 (15) 6.9 (2.1) 7.8 (2.4) 10.4 (3.2) 66 (20) 9.3 (2.8) 10.5 (3.2) 14.0 (4.3) 82 (25) 11.5 (3.5) 13.0 (4.0) 17.4 (5.3) 98 (30) 13.8 (4.2) 15.5 (4.8) 20.8 (6.4) Rosemount 3408 Level Transmitter...
  • Page 20 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) Not applicable to the process seal antenna. Emerson.com/Rosemount...

  • Page 21: Mount The Process Seal Antenna

    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. 3.4.2 Torque specifications The conditions used for the calculation are: Rosemount 3408 Level Transmitter...

  • Page 22: Mount The Lens Antenna

    26 (35) 74 (100) 6-in./DN150/150A 66 (90) 66 (90) 74 (100) 136 (185) 74 (100) Mount the lens antenna 3.5.1 Mount on NPT threaded connections Procedure 1. Apply anti-seize paste or PTFE tape on threads according to your site procedures. Emerson.com/Rosemount...
  • Page 23 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. Example • (A) Threaded fitting • (B) Threaded flange Rosemount 3408 Level Transmitter...

  • Page 24: 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. Emerson.com/Rosemount...
  • Page 25 Reference Manual Mechanical installation 00809-0100-4418 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. 50 mm Rosemount 3408 Level Transmitter...
  • Page 26 September 2022 00809-0100-4418 3.6.3 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 2. Mount the transmitter on the tank. 50 mm Emerson.com/Rosemount...

  • Page 27: 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. H2.5 mm Rosemount 3408 Level Transmitter...
  • Page 28 Mechanical installation Reference Manual September 2022 00809-0100-4418 Emerson.com/Rosemount...

  • Page 29: Chapter 4 Electrical Installation

    WARNING Electrical shock could cause death or serious injury. Ensure the mains power to the transmitter is off and the lines to any other external power source are disconnected or not powered while wiring the transmitter. Rosemount 3408 Level Transmitter...

  • Page 30: Hazardous Areas

    4.3.3 Internal power consumption < 0.8 W in normal operation 4.3.4 Grounding Make sure grounding is done according to national and local electrical codes. Failure to do so may impair the protection provided by the equipment. Emerson.com/Rosemount...
  • Page 31 D. Connect drain wire to the power supply ground Note Do not ground the shield and its drain wire at the transmitter. If the cable shield touches the transmitter housing, it can create ground loops and interfere with communications. Rosemount 3408 Level Transmitter...
  • Page 32 U E (Vdc) 15.6 17.6 4.3.7 Wiring diagram ® Figure 4-4: 4-20 mA/HART Communication A. Handheld communicator B. Approved IS barrier (for Intrinsically Safe installations only) C. HART modem D. Load resistance (≥250 Ω) E. Current meter F. Power supply Emerson.com/Rosemount...

  • Page 33: Connect Wiring And Power Up

    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: ½-14 NPT M20 x 1.5 Rosemount 3408 Level Transmitter...
  • Page 34 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. Emerson.com/Rosemount...
  • Page 35 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. H2.5 mm Rosemount 3408 Level Transmitter...

  • Page 36: Optional Devices

    Rosemount 333 HART Tri-Loop The Rosemount 3408 outputs a HART signal with four process variables. By using the Rosemount 333 HART Tri-Loop, up to three additional analog 4-20 mA outputs are provided. Each Tri-Loop channel receives power from control room. Channel 1 must be powered for the Tri-Loop to operate.
  • Page 37 Reference Manual Electrical installation 00809-0100-4418 September 2022 Figure 4-5: Example Installation of Rosemount 333 with Rosemount 3408 A. Approved IS barrier B. DIN rail mounted Rosemount 333 C. Load resistance (≥250 Ω) D. Control room Related information Rosemount 333 Reference Manual...
  • Page 38 Electrical installation Reference Manual September 2022 00809-0100-4418 Emerson.com/Rosemount...

  • Page 39: Chapter 5 Configuration

    WARNING Electrical shock could cause death or serious injury. Ensure the mains power to the transmitter is off and the lines to any other external power source are disconnected or not powered while wiring the transmitter. Rosemount 3408 Level Transmitter...

  • Page 40: Overview

    ™ • Device Type Manager (DTM ) compliant systems ® • Emerson's configuration tools with Bluetooth wireless technology capabilities Confirm correct device driver Procedure 1. Verify that the correct FDI/DD/DTM Package is loaded on your systems to ensure proper communication.

  • Page 41: Configure Transmitter Using Guided Setup

    Reference Manual Configuration 00809-0100-4418 September 2022 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 42: Wireless Configuration Via Bluetooth ® Technology

    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.

  • Page 43: Run Verify Level

    Use with the Rosemount 333 HART Tri-Loop To prepare the transmitter for use with a Rosemount 333 HART Tri-Loop, the transmitter must be configured to Burst Mode and the process variable output order must be set. Rosemount 3408 Level Transmitter...

  • Page 44: Write Protection

    Reference Manual September 2022 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.
  • Page 45 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. In the locked ( ) position, all writes to the transmitter are rejected. Rosemount 3408 Level Transmitter...
  • Page 46 Configuration Reference Manual September 2022 00809-0100-4418 Emerson.com/Rosemount...

  • Page 47: Operation And Maintenance

    Loop current ANALOG OUT Loop current as perceived by the device. Only for transmitters ordered with Smart Diagnostics Suite. Default, user selectable display text (up to 14 characters). Related information User defined variable setup Rosemount 3408 Level Transmitter...

  • Page 48: Set Up The Lcd Display

    2. In the Display Language list, select the desired language. 6.2.3 Rotate the display The LCD display can be rotated 180 degrees. Procedure 1. Select Configure → (Manual Setup) → Device Setup → Display. 2. In the Display Orientation list, select 0 deg or 180 deg. Emerson.com/Rosemount...

  • Page 49: View Measurement Data

    A value that triggers an alert, such as a high or low temperature indication, will change the overall status of the device, but the measurement might still be indicated as “Good” if the reliability of the data is good. Figure 6-2: Measurement Status Bars Rosemount 3408 Level Transmitter...

  • Page 50: Check Device Status

    Out of At least one Out of Specification Specification alert is active (and no Failure or Function Check alerts). Maintenance At least one Maintenance Required Required alert is active (and no Failure, Function Check, or Out of Specification alerts). Emerson.com/Rosemount...

  • Page 51: Smart Echo Level Test

    6.5.1 Configure the smart echo level Prerequisites This test is available for transmitters with: • Option code ET • Rosemount Radar Master Plus Procedure 1. Select Service Tools → Proof Test. Rosemount 3408 Level Transmitter...

  • Page 52: Smart Meter Verification

    The results of this diagnostic provide a pass/fail summary report helping you to quickly identify and resolve potential issues. Configuration changes since previous verification are tracked to verify consistency of the device setup. Emerson.com/Rosemount...
  • Page 53 2. Under Manual Verification, select Perform Verification and follow the on-screen instructions. 6.6.2 Schedule automatic verification Procedure 1. Select Service Tools → Maintenance → Smart Meter Verification. 2. Under Automatic Verification, select Schedule Verification and follow the on-screen instructions. Rosemount 3408 Level Transmitter...
  • Page 54 Operation and maintenance Reference Manual September 2022 00809-0100-4418 Emerson.com/Rosemount...

  • Page 55: Service And Troubleshooting

    WARNING Electrical shock could cause death or serious injury. Ensure the mains power to the transmitter is off and the lines to any other external power source are disconnected or not powered while wiring the transmitter. Rosemount 3408 Level Transmitter...

  • Page 56: Diagnostic Messages Per Namur Ne 107

    Electronics failure, sensor module Category Failure Cause An electronics error has occurred. The device measurement reading is invalid. Recommended actions 1. Restart the device. 2. If the condition persists, replace the transmitter electronics (or the device). Related information Restart the device Emerson.com/Rosemount...
  • Page 57 1. Check supply voltage is within range and restart device. 2. Restore default settings, restart device, and reconfigure the device. 3. If the condition persists, replace the device. Related information Power supply Restore to default settings Rosemount 3408 Level Transmitter...
  • Page 58 2. Check device physical installation (for instance antenna contamination). 3. Consider increasing Measurement Recovery Time parameter for intermittent conditions. 4. Restart the device. 5. Restore default settings and reconfigure the device. 6. If the condition persists, replace the device. Related information Read the echo curve Emerson.com/Rosemount...
  • Page 59 Restore to default settings Configure transmitter using guided setup Scaled variable configuration error Cause The Scaled Variable configuration is incorrect. Recommended actions 1. Check that the value pairs in the scaled variable table are entered in increasing order. Rosemount 3408 Level Transmitter...
  • Page 60 2. Consider purchasing an upgrade of the device to access additional variables. Related information Primary variable Measurement correction configuration error Cause The factory measurement correction data is invalid. Recommended actions 1. Restore default settings and reconfigure the device. 2. If the condition persists, replace the device. Emerson.com/Rosemount...
  • Page 61 Recommended actions 1. Restart the device. 2. Restore default settings and reconfigure device. 3. If the condition persists, replace the device. Related information Restart the device Restore to default settings Configure transmitter using guided setup Rosemount 3408 Level Transmitter...
  • Page 62 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. Related information Rosemount 3408 Safety Manual Operational mode Restore to default settings Configure transmitter using guided setup...
  • Page 63 Increase analog out span by adjusting Upper or Lower Range Value. Related information Upper/lower range value Analog out calibration error Cause Analog output calibration failed. Recommended actions 1. Try calibrating the analog output again. 2. If the condition persists, replace the device. Rosemount 3408 Level Transmitter...
  • Page 64 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. Related information Rosemount 3408 Safety Manual Operational mode Restore to default settings Configure transmitter using guided setup...
  • Page 65 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. If condition persists, contact your local Emerson representative to get a valid start code. 7.2.9 Safety mode not activated...
  • Page 66 Maintenance Required Cause The user defined variable is above 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. Emerson.com/Rosemount...
  • Page 67 1. If volume strapping table is used, make sure level values within operating range are included. 2. If scaled variable table is used, make sure input variable values within operating range are included. Related information Volume Scaled variable 7.2.16 Dielectric constant estimation degraded Category Maintenance Required Rosemount 3408 Level Transmitter...
  • Page 68 The field device will continue to function independent of this Bluetooth alert. Recommended actions 1. Restart the device 2. Check the electrical connection (remove and re-mount the Bluetooth display) 3. Replace Bluetooth display. 4. If the condition persists, replace the transmitter electronics. Related information Restart the device Emerson.com/Rosemount...

  • Page 69: 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. Related information Troubleshooting incorrect level readings Troubleshooting the 4-20 mA/HART output Rosemount 3408 Level Transmitter...
  • Page 70 Run Verify Level to adjust level measurement. • Analyze the echo curve and check amplitude thresholds. • Restore default settings and reconfigure the device. Related information Reference height Run verify level Read the echo curve Amplitude threshold Restore to default settings Emerson.com/Rosemount...
  • Page 71 Remove the disturbing object. • Put an inclined metal plate on top of the disturbing object. • Move the transmitter to another position. Related information Suppressing false echoes Read the echo curve Amplitude threshold Installation considerations Rosemount 3408 Level Transmitter...
  • Page 72 Remove the disturbing object. • Move the transmitter to another position. Possible cause Product build-up on the antenna. Recommended actions • Clean the antenna. Related information Suppressing false echoes Read the echo curve Amplitude threshold Change the upper null zone Installation considerations Emerson.com/Rosemount...
  • Page 73 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. Related information Upper null zone Rosemount 3408 Level Transmitter...
  • Page 74 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 Emerson.com/Rosemount...
  • Page 75 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. Related information Damping value Process conditions Rosemount 3408 Level Transmitter...
  • Page 76 Figure 7-7: Symptom A. Level 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 Read the echo curve Emerson.com/Rosemount...
  • Page 77 If there is a problem with lag during rapid level changes, consider decreasing the Damping value. Possible cause Maximum Level Rate value too low. Recommended actions • Verify Maximum Level Rate configuration. Related information Damping value Maximum level rate Rosemount 3408 Level Transmitter...
  • Page 78 B. Time C. Actual level 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 Emerson.com/Rosemount...
  • Page 79 B. Time C. Actual level D. Reported level Possible cause A strong double bounce echo is interpreted as the product surface. Recommended actions • Enable the Double Bounce Handling function. Related information Handling strong double bounce echoes Rosemount 3408 Level Transmitter...
  • Page 80 Verify the Reference Height is configured correctly. • Enable the Tank Bottom Projection function • Enable the Bottom echo visible when tank is empty parameter. Related information Reference height Use tank bottom projection Enable bottom echo visible when tank is empty Emerson.com/Rosemount...
  • Page 81 "Level measurement lost". Recommended actions • Before opening the manway cover, disconnect power to the transmitter. • After closing, restart the device. • Move the transmitter to another position. Related information Restart the device Installation considerations Rosemount 3408 Level Transmitter...
  • Page 82 "Level measurement lost". The message is cleared when start filling the tank. 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 Restart the device Installation considerations Emerson.com/Rosemount...
  • Page 83 If measurement in this region is not crucial, increase the Empty Tank Detection Area. • Verify the Bottom echo visible when tank is empty parameter is disabled. Related information Reference height Bottom offset Empty tank handling Enable bottom echo visible when tank is empty Rosemount 3408 Level Transmitter...
  • Page 84 3. Verify device is properly grounded. 4. Verify shield for twisted pair is only grounded at the power supply end. 5. Under turbulent conditions with low level rates, consider increasing the Damping value. Related information Power supply Grounding Damping value Emerson.com/Rosemount...

  • Page 85: Service And Troubleshooting Tools

    The Rosemount Radar Master Plus software includes functions for viewing and recording single instances or movies of the echo curve. The echo curve represents the tank, as seen by the radar transmitter. Each peak corresponds to a strong reflection of the radar signal. Rosemount 3408 Level Transmitter...
  • Page 86 1. Select Service Tools → Echo Curve. Rosemount Radar Master Plus reads one echo curve and then stops. 2. To continuously update the echo curve, select the Play icon. Analyzing the echo curve The following echo peaks may appear in the echo curve: Emerson.com/Rosemount...
  • Page 87 1 000 2 000 3 000 4 000 5 000 6 000 7 000 A. Suppressed (dashed line indicates use of false echo suppression) B. False echo suppression C. Unknown D. Amplitude threshold E. Surface Rosemount 3408 Level Transmitter...
  • Page 88 Rosemount Radar Master Plus continues to load data from that point forward. View active/historical alerts Procedure In the timeline, click the left or right arrow to scroll to the alert, and then select the alert icon for details. Emerson.com/Rosemount...
  • Page 89 8. Select Back. Set echo curve range Procedure 1. Select Service Tools → Echo Curve. 2. Select Options. 3. Under Echo Curve Range, select User Defined. 4. Enter the desired values. 5. Select Save. 6. Select Back. Rosemount 3408 Level Transmitter...
  • Page 90 4 mA and 20 mA currents. Calibration is done at factory and the analog output does not normally need to be recalibrated. Procedure 1. Select Service Tools → Maintenance → Routine Maintenance. 2. Select D/A trim (Calibrate Analog Out in Rosemount Radar Master Plus) and follow the on-screen instructions. Emerson.com/Rosemount...
  • Page 91 3. Browse to the backup file and select Open. 7.4.6 Restart the device To restart the device electronics: Procedure 1. Select Service Tools → Maintenance → Reset/Restore. 2. Select Restart Device and follow the on-screen instructions. Rosemount 3408 Level Transmitter...
  • Page 92 Measured data is continuously stored in the input registers. By viewing the contents of the input registers, expert users can check that the transmitter works properly. Procedure 1. Select Configure → (Manual Setup) → Level Setup → Advanced → Expert Options → Input Registers. Emerson.com/Rosemount...
  • Page 93 Do not use holding registers to configure the transmitter unless you are qualified. This dialog is mainly used for service purposes and for advanced configuration. Procedure In the Holding Registers tab, select Write Holding Register and follow the on-screen instructions. Rosemount 3408 Level Transmitter...

  • Page 94: Application Challenges

    The amplitude threshold is set at factory for optimum performance and should not normally need an adjustment. Before changing the factory default, study the position and amplitude of the different echo peaks. It is recommended to adjust thresholds using Rosemount Radar Master Plus. Procedure 1. Select Service Tools → Echo Curve. Emerson.com/Rosemount...
  • Page 95 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. In the echo curve, select the desired amplitude threshold point, and select Split threshold or Merge with threshold below. Rosemount 3408 Level Transmitter...
  • Page 96 Follow these recommendations before suppressing new false echoes: • Make sure a correct amplitude threshold is set. • Make sure the level is stable. A fluctuating level may indicate a temporary disturbance which is not due to an interfering object. Emerson.com/Rosemount...
  • Page 97 Related information Amplitude threshold Delete a false echo suppression Prerequisites It is recommended to suppress false echoes using Rosemount Radar Master Plus. Procedure 1. Select Service Tools → Echo Curve. Rosemount 3408 Level Transmitter...
  • Page 98 • To change a suppression, select the cell you want change and type the new value. • To delete a suppression, select the row you want to delete, and then select Delete. 4. Select Save. 5. Select Back. Emerson.com/Rosemount...
  • Page 99 (typical for flat tank bottoms), the transmitter may lock on the bottom echo and report a false level measurement (empty tank). If the application requires, the Tank Bottom Projection settings can be user-defined. Figure 7-23 illustrates an example of the Tank Bottom Projection when the tank is being emptied. Rosemount 3408 Level Transmitter...
  • Page 100 Enable bottom echo visible when tank is empty Enable the Bottom echo visible when tank is empty parameter if a bottom echo is visible when tank is empty (i.e. for flat tank bottoms). The bottom echo will then be treated as a Emerson.com/Rosemount...
  • Page 101 1. Select Configure → Level Setup → Advanced. 2. Under More Advanced Options, select Empty Tank Handling. 3. In the Empty Tank Handling list, select User Defined. 4. Select the Bottom echo visible when tank is empty check box. Rosemount 3408 Level Transmitter...
  • Page 102 C. Actual level D. Virtual level (first double bounce) E. Signal amplitude F. Distance Prerequisites Note The Double Bounce Handling function should only be used if the problem of double bounces cannot be solved by changing the mounting position. Emerson.com/Rosemount...

  • Page 103: 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 104 Service and troubleshooting Reference Manual September 2022 00809-0100-4418 Emerson.com/Rosemount...

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