Emerson Rosemount 3408 Reference Manual Download Page 94 | Manualshive

Page: 94 / 104

Emerson Rosemount 3408 Reference Manual Download Page 94

7.5

Application challenges

7.5.1

Managing disturbance echoes

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. The transmitter uses certain criteria to decide which type of echo peak that
is detected. Only echoes above the amplitude threshold might be considered the product
surface. The amplitude threshold can either be set to a constant value, or split into
sections as defined by up to 10 anchor points.

If necessary, a customized amplitude threshold section can for instance be used to remove
the influence from the tank nozzle, or disturbances close to the tank bottom. Additionally,
it might be needed in areas where there are occasionally strong echoes present, for
instance due to wide mixer blades. Suppressing false echoes may not be sufficient in those
areas.

Note

Do not create a customized amplitude threshold section around echoes which are already
registered as false echoes.

Adjust the amplitude threshold

If necessary, the amplitude threshold 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 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

.

Service and troubleshooting

Reference Manual

September 2022

00809-0100-4418

94

Emerson.com/Rosemount

«
...
92
93
94
95
96
...
»

Summary of Contents for Rosemount 3408

Page 1: ...Reference Manual 00809 0100 4418 Rev AA September 2022 Rosemount 3408 Level Transmitter Non Contacting Radar ...

Page 2: ...ations in hazardous locations the transmitter must be installed according to the Rosemount 3408 Product Certifications document and System Control Drawing WARNING Explosions could result in death or serious injury Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications Before connecting a handheld communicator in an explosive at...

Page 3: ...ARNING Physical access Unauthorized personnel may potentially cause significant damage to and or misconfiguration of end users equipment This could be intentional or unintentional and needs to be protected against Physical security is an important part of any security program and fundamental to protecting your system Restrict physical access by unauthorized personnel to protect end users assets Th...

Page 4: ...4 ...

Page 5: ...rations 16 3 4 Mount the process seal antenna 21 3 5 Mount the lens antenna 22 3 6 Mount the ATAP lens antenna 24 3 7 Rotate the transmitter housing 27 Chapter 4 Electrical installation 29 4 1 Safety messages 29 4 2 Hazardous areas 30 4 3 Prepare the electrical connections 30 4 4 Connect wiring and power up 33 4 5 Optional devices 36 Chapter 5 Configuration 39 5 1 Safety messages 39 5 2 Overview 4...

Page 6: ...fety messages 55 7 2 Diagnostic messages per NAMUR NE 107 56 7 3 Troubleshooting guides 69 7 4 Service and troubleshooting tools 85 7 5 Application challenges 94 7 6 Service support 103 Appendix A 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...

Page 7: ... 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 Table 1 1 Identification and Compatibility According to NAMUR NE 53 Release date Device identification FDI DD and DTM identification Release note revision level 1 and 2 1 NAMUR hardware revision 1 NAMUR softw...

Page 8: ... open source software Further information can be found in the License Information document available at Emerson com Rosemount 1 5 Product recycling disposal Recycling of equipment and packaging should be taken into consideration and disposed of in accordance with local and national legislation or regulations Introduction Reference Manual September 2022 00809 0100 4418 8 Emerson com Rosemount ...

Page 9: ...al is subtracted from the frequency of the signal transmitted at that moment resulting in a low frequency signal which is proportional to the distance to the product surface This signal is further processed to obtain fast reliable and highly accurate level measurements Figure 2 1 FMCW method d fin fmax fmin fout fin fout t f A C D B Δf d distance A Frequency GHz B Time s C Transmitted signal D Ref...

Page 10: ...er has built in functions designed to reduce the influence from disturbing objects where such objects cannot be totally avoided Vertical and inclined structures cause minimal effect since the radar signal is scattered rather than directed back to the antenna 2 3 2 Tank shape The shape of the tank bottom affects the measurement signal when the product surface is close to the tank bottom The transmi...

Page 11: ...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 Reference Manual Transmitter overview 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 11 ...

Page 12: ...G A E H F I A LCD display optional B Two cable conduit entries 14 NPT or M20 x 1 5 C Transmitter housing D External ground screw E Process seal antenna F Lens antenna G Main label H ATAP Atmospheric Temperature and Pressure lens antenna I Antenna extension for open air installations Related information Dimensional drawings Transmitter overview Reference Manual September 2022 00809 0100 4418 12 Eme...

Page 13: ...T data with IEC 62591 WirelessHART technology In addition the transmitter can be connected to a Rosemount 751 Field Signal Indicator or it can be equipped with an integral display available with optional Bluetooth wireless technology Figure 2 3 System Architecture A C B E D F G H I J A Emerson Wireless 775 THUM Adapter B Rosemount 3408 C Rosemount 751 D Wireless communication using Bluetooth techn...

Page 14: ...Transmitter overview Reference Manual September 2022 00809 0100 4418 14 Emerson com Rosemount ...

Page 15: ...m Control Drawing Repair e g substitution of components etc may jeopardize safety and is under no circumstances allowed WARNING Explosions could result in death or serious injury Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications Before connecting a handheld communicator in an explosive atmosphere ensure the instruments are...

Page 16: ...tion on the tank for the transmitter the conditions of the tank must be carefully considered Consider the following guidelines when mounting the transmitter For optimal performance the transmitter should be installed in locations with a clear and unobstructed view of the product surface The transmitter should be mounted with as few internal structures as possible within the signal beam Do not inst...

Page 17: ... 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 200 mm of tank radius Reference Manual Mechanical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 17 ...

Page 18: ...nclination Figure 3 4 Inclination 90 Max 3 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 Mechanical installation Reference Manual September 2022 00809 0100 4418 18 Emerson com Rosemount ...

Page 19: ...Lens antenna 1 and 1 in threads 9 ATAP lens antenna 8 Beam width See Table 3 3 for beam width at different distances Table 3 3 Beam Width W ft m Distance D Beam angle α 8 9 12 16 5 2 2 0 7 2 5 0 8 3 4 1 1 33 10 4 6 1 4 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 Reference Manual Mechanical installa...

Page 20: ... rust or deposit Figure 3 6 Mounting in Nozzles D H 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 150 mm 2 in 50 mm 7 9 in 200 mm 3 in 80 mm 11 8 in 300 mm 4 in 100 mm 15 8 in 400 mm 6 in 150 mm 23 6 in 600 mm 1 Not applicable to the process seal antenna Mechanical installation Reference Manual September 2022 00809 0100 4418 ...

Page 21: ...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 2 Torque specifications The conditions used for the calculation are Reference Manual Mechanical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 21 ...

Page 22: ...IS B2220 Class 150 Class 300 PN16 PN40 10K 20K 2 in DN50 50A 29 40 52 70 26 35 29 40 18 25 37 50 3 in DN80 80A 33 45 48 65 37 50 41 55 22 30 70 95 4 in DN100 100A 59 80 52 70 37 50 74 100 26 35 74 100 6 in DN150 150A 66 90 66 90 74 100 136 185 74 100 N A 3 5 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 s...

Page 23: ...ful 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 A B Reference Manual Mechanical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 23 ...

Page 24: ...nna 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 Mechanical installation Reference Manual September 2022 00809 0100 4418 24 Emerson com Rosemount ...

Page 25: ...he bracket to the pipe wall Example 14 mm 2 Mount the adapter 14 mm 3 Secure the transmitter to the adapter 50 mm Reference Manual Mechanical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 25 ...

Page 26: ...s 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 B Mechanical installation Reference Manual September 2022 00809 0100 4418 26 Emerson com Rosemount ...

Page 27: ...ter 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 Reference Manual Mechanical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 27 ...

Page 28: ...Mechanical installation Reference Manual September 2022 00809 0100 4418 28 Emerson com Rosemount ...

Page 29: ...m Control Drawing Repair e g substitution of components etc may jeopardize safety and is under no circumstances allowed WARNING Explosions could result in death or serious injury Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications Before connecting a handheld communicator in an explosive atmosphere ensure the instruments are...

Page 30: ...20 1 5 mm2 Twisted pairs and shielded wiring are recommended for environments with high EMI electromagnetic interference Fine stranded conductors shall be equipped with a ferrule 4 3 2 Cable gland conduit For explosion proof flameproof installations only use cable glands or conduit entry devices certified explosion proof or flameproof 4 3 3 Internal power consumption 0 8 W in normal operation 4 3 ...

Page 31: ...housing Continuously connected throughout the segment Connected to a good earth ground at the power supply end Figure 4 2 Cable Shield B A C C C D A Insulate shield and drain wire B Minimize distance C Trim shield and insulate exposed drain wire 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 transm...

Page 32: ...level of the external power supply UE UE Vdc R Ω 15 6 R 44 4 UE 12 15 6 R 250 UE 15 Figure 4 3 Load Limits 12 35 24 0 200 400 600 800 1000 UE Vdc 532 250 162 1021 17 6 15 6 R Ω 4 3 7 Wiring diagram Figure 4 4 4 20 mA HART Communication C F D B A E 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 sup...

Page 33: ... 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 M20 x 1 5 14 NPT Reference Manual Electrical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 33 ...

Page 34: ...river 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 Electrical installation Reference Manual September 2022 00809 0100 4418 34 Emerson com Rosemount ...

Page 35: ...r 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 Reference Manual Electrical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 35 ...

Page 36: ...to secure the cover 12 Connect the power supply 4 5 Optional devices 4 5 1 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 The transmitter rec...

Page 37: ... A D C PV SV TV QV A Approved IS barrier B DIN rail mounted Rosemount 333 C Load resistance 250 Ω D Control room Related information Rosemount 333 Reference Manual Reference Manual Electrical installation 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 37 ...

Page 38: ...Electrical installation Reference Manual September 2022 00809 0100 4418 38 Emerson com Rosemount ...

Page 39: ...m Control Drawing Repair e g substitution of components etc may jeopardize safety and is under no circumstances allowed WARNING Explosions could result in death or serious injury Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications Before connecting a handheld communicator in an explosive atmosphere ensure the instruments are...

Page 40: ...s technology capabilities 5 4 Confirm correct device driver Procedure 1 Verify that the correct FDI DD DTM Package is loaded on your systems to ensure proper communication 2 Download the latest FDI DD DTM Package at Emerson com DeviceInstallKits or FieldCommGroup org Related information NAMUR NE 53 revision history 5 5 Rosemount Radar Master Plus Rosemount Radar Master Plus is the recommended tool...

Page 41: ...ce Package 3 Browse to the downloaded FDI Package and select Open 4 Select Add 5 Select Back 5 6 Configure transmitter using guided setup The options available in the Guided Setup wizard include all items required for basic operation Procedure 1 If using an FDI compliant software then select Overview Rosemount Radar Master Plus 2 Select Configure Guided Setup and follow the on screen instructions ...

Page 42: ...ice Configurator 2 Click on the device you want to connect to 3 On first connection enter the key for this device 4 At the top left click the menu icon 5 Select Configure Guided Setup Basic Setup and follow the on screen instructions Bluetooth UID and key You can find the UID and key on the paper tag attached to the device and on the display unit Figure 5 1 Bluetooth Security Information UID KEY C...

Page 43: ...nstructions Related information Calibration offset 5 9 Multidrop communication Multidropping transmitters refers to the connection of several transmitters to a single communications transmission line Communication between the host and the transmitters takes place digitally with the analog output of the transmitters deactivated 5 9 1 Establish multidrop communication In multidrop communication each...

Page 44: ...er Burst Command select PV SV TV QV and then select Next e Under Burst Msg Trigger Mode select Continuous and then select Next f Set the Update Period and then select Finish 5 Prior to exiting the configuration note the selected variables for SV TV and QV and the units set for each of the variables The same configuration must be used for the Rosemount 333 Related information Rosemount 333 Referenc...

Page 45: ...on 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 In the locked position all writes to the transmitter are rejected Reference Manual Configuration 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 45 ...

Page 46: ...Configuration Reference Manual September 2022 00809 0100 4418 46 Emerson com Rosemount ...

Page 47: ...to surface threshold and noise Scaled variable 1 SCALED VARIABLE 2 A variable calculated from a scaling table as defined by pairs of input scaled values Percent of range primary variable OF RANGE PV A variable value expressed in percent within a range defined by a Lower Range Value LRV and an Upper Range Value URV Auxiliary percent of range OF RANGE AUX A variable value expressed in percent within...

Page 48: ... the LCD display 6 2 2 Change the display language Procedure 1 Select Configure Manual Setup Device Setup 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 Operation and maintenance Reference Ma...

Page 49: ...liability or integrity of the data being received not an indication of whether or not the value is within the configured upper or lower ranges 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 Reference...

Page 50: ...iption Action Good No active alert N A Failure At least one Failure alert is active Click the Troubleshoot button 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 Click the Investigate button to open a window with active alerts together with recommended actions Out of Specification At least one Ou...

Page 51: ...echo level test The function allows you to test the behavior of the transmitter in a real tank environment without raising the level 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 The test verifies the integrity of the signal processing and can be used to test the alarm limits in the host syste...

Page 52: ...easurement values from the transmitter are made aware of the changed conditions Failure to do so could result in death serious injury and or property damage Procedure 1 Select Service Tools Proof Test 2 Select Smart Echo Level Test 3 Select Start and follow the on screen instructions Postrequisites When you have finished testing select Stop to return to normal operation Related information Simulat...

Page 53: ...rification 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 Reference Manual Operation and maintenance 00809 0100 4418 September 2022 Rosemount 3408 ...

Page 54: ...Operation and maintenance Reference Manual September 2022 00809 0100 4418 54 Emerson com Rosemount ...

Page 55: ...m Control Drawing Repair e g substitution of components etc may jeopardize safety and is under no circumstances allowed WARNING Explosions could result in death or serious injury Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications Before connecting a handheld communicator in an explosive atmosphere ensure the instruments are...

Page 56: ...valid Recommended actions 1 Restart the device 2 If the condition persists replace the transmitter electronics Related information Restart the device 7 2 2 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...

Page 57: ...resulting in an invalid device measurement reading Recommended actions 1 Clean the antenna 2 If the condition persists replace the device 7 2 5 Startup failure Category Failure Cause Device repeatedly failed to start up with user configuration settings The device measurement reading is invalid Recommended actions 1 Check supply voltage is within range and restart device 2 Restore default settings ...

Page 58: ...nfigure transmitter using guided setup 7 2 7 Level measurement lost Category Failure 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 Curve at time of loss for reason and check device configuration especially thresholds 2 Check device physical installation for instance antenn...

Page 59: ...at level volume values are entered in increasing order 2 If strapping table is used check that number of strapping points to use is correct 3 If tank dimensions are used for volume check that geometry shape and size measures are correct 4 If condition persists restore default settings and reconfigure the device Related information Volume Geometry Restore to default settings Configure transmitter u...

Page 60: ...tore to default settings Configure transmitter using guided setup Primary variable configuration error Cause The Primary Variable selection is not supported Note The IEC 61508 certified version only supports level or distance as Primary Variable Recommended actions 1 Change Primary Variable to variable supported by device 2 Consider purchasing an upgrade of the device to access additional variable...

Page 61: ...nd reconfigure the device Related information Amplitude threshold Restore to default settings Configure transmitter using guided setup Factory approval error Cause The Sensor Module factory approval is missing The Transmitter factory approval is missing Note This error may also be set as a result of the startup failure If both errors are present then see the startup failure message Recommended act...

Page 62: ...res may be enabled by purchasing an upgrade of the device Recommended actions 1 Check that selections for variables e g Primary Variable are supported by this device 2 Turn off functionality not supported by this device 3 Consider purchasing an upgrade of the device to access additional variables and functionality 4 If condition persists restore default settings and reconfigure device Related info...

Page 63: ...ilure If both errors are present then see the startup failure message Recommended actions Replace the device Analog out span configuration error Cause The span for the configured analog out range is too small Recommended actions 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 f...

Page 64: ...gure transmitter using guided setup Engineering unit configuration error Cause One of the configured engineering units is not supported by the device Recommended actions 1 Check unit configuration 2 If condition persists restore default settings and reconfigure device Related information Units Restore to default settings Configure transmitter using guided setup Burst mode configuration error Cause...

Page 65: ...e is in alarm mode This device is configured for use in Safety Instrumented Systems SIS which requires Safety Mode to be enabled Recommended actions 1 Change Safety Mode to Enabled for use in SIS application 2 Change Operational Mode to Control Monitoring if device is not intended to be used as safety device Related information Rosemount 3408 Safety Manual 7 2 10 Simulation test active Category Fu...

Page 66: ...ategory Maintenance Required Cause The Signal Quality is below the defined alert limit Recommended actions 1 Take action based on your intended use of this alert 2 Clean the antenna 3 If no actions were necessary consider to change the limit Related information Signal quality alert 7 2 13 High user defined alert Category Maintenance Required Cause The user defined variable is above the defined lim...

Page 67: ...variable out of range Category Maintenance Required Cause The level measurement is outside the configured range for volume or scaled variable or both Accuracy of volume scaled variable measurement may be degraded Recommended actions 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 withi...

Page 68: ...dependent of this Bluetooth alert Recommended actions 1 Click the Details button for more information 2 Follow the instructions to correct the Bluetooth error Bluetooth functionality limited Cause Device is unable to send device data over Bluetooth due to an internal error The field device will continue to function independent of this Bluetooth alert Recommended actions 1 Restart the device 2 Chec...

Page 69: ...ity will result in no Bluetooth communications the field device will continue to function independent of this Bluetooth alert Recommended actions Update the Bluetooth firmware 7 3 Troubleshooting guides If there is a malfunction despite the absence of alerts follow the procedures described in the appropriate troubleshooting guide Under each of the symptoms specific suggestions for solving problems...

Page 70: ...ometry parameters are configured correctly especially the Reference Height 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 Service and troubleshooting Reference Manual Septemb...

Page 71: ...g 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 Move the transmitter to another position Related information Suppressing false echoes Read the echo curve Amplitude threshold Installation considerations Reference Manual Service and troubleshooting 00809 0100 4418 September 2022 Rosemo...

Page 72: ...o curve and check amplitude thresholds 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 Related information Suppressing false echoes Read the echo curve Amplitude threshold Change the upper null zone Installation considerations Service and troubleshooting Reference...

Page 73: ...me C Actual level D 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 Related information Upper null zone Reference Manual Service and troubleshooting 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 73 ...

Page 74: ... 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 Service and troubleshooting Reference Manual September 2022 00809 0100 4418 74 Emerson com Rosemount ...

Page 75: ...commended 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 Reference Manual Service and troubleshooting 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 75 ...

Page 76: ...evel 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 Service and troubleshooting Reference Manual September 2022 00809 0100 4418 76 Emerson com Rosemount ...

Page 77: ...o 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 Recommended actions Verify Maximum Level Rate configuration Related information Damping value Maximum level rate Reference Manual Service and troubleshooting 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 77 ...

Page 78: ...el 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 Service and troubleshooting Reference Manual September 2022 00809 0100 4418 78 Emerson com Rosemount ...

Page 79: ... D A Level 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 Reference Manual Service and troubleshooting 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 79 ...

Page 80: ...ked on a strong tank bottom echo Recommended actions 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 Service and troubleshooting Reference Manual September 2022 00809 0100 4418 80 Eme...

Page 81: ...isturbance echo and report this as surface level when the cover is opened After closing the cover the echo is lost and the transmitter reports 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 Refer...

Page 82: ... a disturbance echo which is interpreted as the product surface echo After closing the door the echo is lost and the transmitter reports 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 ...

Page 83: ...tions Verify the tank geometry parameters are configured correctly especially the Reference Height and Bottom Offset 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 Reference ...

Page 84: ... that power wires are connected to the correct signal terminals 5 Perform Calibrate Analog Out Related information Upper lower range value Alarm mode Calibrate analog out Milliamp reading is erratic Recommended actions 1 Verify power supply voltage is adequate at signal terminals 2 Check for external electrical interference 3 Verify device is properly grounded 4 Verify shield for twisted pair is o...

Page 85: ...stance 250 ohms minimum 3 Check if device is at an alternate HART address 4 Check current analog output value to verify that device hardware works Related information Power supply HART polling address 7 4 Service and troubleshooting tools 7 4 1 Using the echo curve The Rosemount Radar Master Plus software includes functions for viewing and recording single instances or movies of the echo curve The...

Page 86: ...tood by studying the position and amplitude of the different peaks Additionally the recorded echo curves give insight into unexpected and intermittent measurement behaviors for instance at the time of the triggered alert Read the echo curve To read the echo curve in Rosemount Radar Master Plus Procedure 1 Select Service Tools Echo Curve Rosemount Radar Master Plus reads one echo curve and then sto...

Page 87: ...ace Echo tracked as the current secondary surface if Double Surface Handling function is enabled Tank bottom echo Echo considered as an echo from the tank bottom Figure 7 16 Echo Curve with Typical Echo Peaks C meter 0 0 1 000 2 000 3 000 4 000 5 000 6 000 7 000 mV 0 5 1 0 1 5 2 0 2 5 3 0 3 5 D A E A B A Suppressed dashed line indicates use of false echo suppression B False echo suppression C Unkn...

Page 88: ...al echo curves Procedure To go to a desired point in the displayed part of the timeline drag the slider or click anywhere in the timeline To move the timeline forward or backward click the left or right arrow or drag anywhere in the timeline Tip To speed up the upload time of historical data in a specific area click or drag the slider to the desired start point on the timeline Rosemount Radar Mast...

Page 89: ...e name 4 Browse to the desired directory and then select Save 5 Under Time range select Last 1 hour Last 3 hours Last 24 hours or User defined range 6 If User defined range is selected specify the start and end times 7 Select Export 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...

Page 90: ...Procedure 1 Select Service Tools Simulate 2 Under Analog Out select Loop test and then follow the on screen instructions 3 Measure the loop current Postrequisites Select Stop or Cancel to exit loop test Abort on handheld communicator Related information Calibrate analog out Simulation test active 7 4 3 Calibrate analog out Use this function to calibrate the analog output by comparing the actual ou...

Page 91: ...tenance Backup 2 Select Save Configuration 3 Type your desired file name 4 Browse to the desired directory and then select Save 5 Optional Select the Create and save report pdf check box 6 Select Save 7 4 5 Download configuration from file to device Prerequisites This function is only available in Rosemount Radar Master Plus Procedure 1 Select Service Tools Maintenance Backup 2 Select Restore Conf...

Page 92: ...ooth select Reset Bluetooth Security and follow the on screen instructions 3 To confirm the reset reconnect the device to the mobile app using the default key 7 4 9 Use the simulation mode This function can be used to simulate measurements Procedure 1 Select Service Tools Simulate 2 Under Simulate Measurement Values select desired transmitter variable and follow the on screen instructions Related ...

Page 93: ...er Plus 4 Handheld communicator Select Holding Registers 7 4 12 Edit holding registers Edit holding registers using Rosemount Radar Master Plus Prerequisites Note 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 1 To change a holding register value type a new value in the corr...

Page 94: ... to the tank bottom Additionally it might be needed in areas where there are occasionally strong echoes present for instance due to wide mixer blades Suppressing false echoes may not be sufficient in those areas Note Do not create a customized amplitude threshold section around echoes which are already registered as false echoes Adjust the amplitude threshold If necessary the amplitude threshold c...

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 Reference Manual Service and troubleshooting 00809 0100 4418 September 2022 Rosemount 3408 Level Transmitter 95 ...

Page 96: ... then measure with higher reliability even if the surface echo is weaker than the false echo see Figure 7 20 Figure 7 20 Suppression of False Echoes meter 0 0 1 000 2 000 3 000 4 000 5 000 6 000 7 000 mV 0 5 1 0 1 5 2 0 2 5 3 0 3 5 D B A E C A Amplitude threshold B Disturbing object C False echo suppression D Suppressed echo E Surface Add a new false echo suppression Prerequisites Follow these rec...

Page 97: ...ice Tools Echo Curve 2 In the echo curve click at the unknown echo peak and then select Suppress Figure 7 21 Add False Echo Suppression Postrequisites It may be necessary to suppress new false echoes at a later stage when objects have become visible due to surface movement Related information Amplitude threshold Delete a false echo suppression Prerequisites It is recommended to suppress false echo...

Page 98: ...s Procedure 1 Select Service Tools Echo Curve 2 Select Options 3 Select Suppress False Echo Manually Suppressed echoes are shown in the table To add a new suppression select Add and then type the distance to the false echo and the width of the false echo area 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...

Page 99: ...Select Configure Level Setup Antenna b Under Advanced type desired Upper Null Zone and then select Save Related information Read the echo curve Upper null zone 7 5 3 Tracking of weak surface echoes close to tank bottom Use tank bottom projection The Tank Bottom Projection function can be used to enhance measurement performance in the tank bottom region If the product surface echo is weak in the ta...

Page 100: ...tric constant Enter the product dielectric constant for the product in the bottom of the tank Maximum projection distance This defines the range in which the function operates Enter the maximum distance from the zero level tank bottom It is recommended to use the default setting Minimum tank bottom echo amplitude Enter the minimum allowed amplitude for the echo from the tank bottom before this fun...

Page 101: ...fore enabling the Bottom echo visible when tank is empty parameter Analyze the echo curve and check that a bottom echo is visible when tank is empty Verify that the Bottom Offset value is correct The Bottom echo visible when tank is empty parameter is only available in Rosemount Radar Master Plus Procedure 1 Select Configure Level Setup Advanced 2 Under More Advanced Options select Empty Tank Hand...

Page 102: ... back and forth between the product surface and tank roof or other object within the tank before it is detected by the transmitter Normally these signals have a low amplitude and are ignored by the transmitter Figure 7 25 Double Bounce Echoes A B C E F D A Distance to surface B Distance to first double bounce C Actual level D Virtual level first double bounce E Signal amplitude F Distance Prerequi...

Page 103: ...h double bounce echo is constant The Double Bounce Offset is used to define the distance between detected double bounces as given by the following formula see Figure 7 25 Double Bounce Offset B 2A The Double Bounce Offset is negative if the reflection point normally the tank roof is below the Tank Reference Point 7 6 Service support To expedite the return process refer to Emerson com and contact t...

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

Reviews:

No comments