Operating Instructions - MBA PULS 300 - 4 ? 20 mA/HART two-wire
Contents
1. Fig 12 Mounting on the vessel ceiling Caution A When mounting on the vessel ceiling mark sure that the sensor does not overfill Depending on the measured product this can cause a mechanical damage In a cylindrical silo with conical outlet it is the easiest way to carry out the mounting on a socket in the center of the silo 18 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 4 Mounting Fig 13 Orientation Material heaps Large material heaps are best measured with several instruments which can be mounted on e g traverse cranes For this type of application it is advantageous to orient the sensor perpendicular to the bulk solid surface The sensors do not influence each other Information Keep in mind that for these applications the sensors are designed for relatively slow level changes If the sensor is used on a movable boom the max measuring rate must be observed see chapter Technical data pie MBA PULS 300 e 4 20 mA HART two wire 19 4 Mounting Vessel installations Agitators Fig 14 Radar sensors on traverse crane The mounting location of the radar sensor should be a place where no other equipment or fixtures cross the path of the microwave signals Vessel installations such as e g ladders limit switches heating spirals struts etc can cause false echoes that can influence the2. Caution If in the vessel there is a separation of liquids with different value for example by condensation the radar sensor can detect under certain circumstances only the medium with the higher dielectric value Keep in mind that interfaces can cause faulty measurements If you want to measure the total height of both liquids reliably please contact our service department or use an instrument specially designed for interface measurement 32 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 6 Set up with the indicating and adjustment module Setup Vessel height measuring range Setup Vessel form The selection Standpipe opens a new window in which the inner diameter of the applied standpipe is entered Application Stilling tube bei Tube inner diameter Tube inner diameter 10 500 Application Application Application vol Heap Bunker Denon Bunker quick filling enonstratio Heap Crusher v Through this selection the sensor is adapted optimally to the application or the location and measurement reliability under the various basic conditions is increased considerably Enter the requested parameters via the appropriate keys save your settings with OK and jump to the next menu item with the ESC and the gt key With this selection the operating range of the sensor is adapted to the vessel height and the reliability with different frame
3. Fig 17 Installation and orientation in multiple chamber silos MBA PULS 300 e 4 20 mA HART two wire 21 4 Mounting Air rinsing Fig 18 Installation and orientation in multiple chamber silos Air rinsing is useful for avoiding buildup particularly when there is strong condensation Since MBA PULS 300 has no direct rinsing air connection a separate rinsing air connection must be provided in the mounting socket By inclining this connection towards the top a particularly effective cleaning of the antenna cover is achieved Li J U Fig 19 Purging air connection 22 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 5 Connecting to power supply Safety instructions Voltage supply Connection cable Cable screening and grounding 5 Connecting to power supply 5 1 Preparing the connection Always keep in mind the following safety instructions e Connect only in tne complete absence of line voltage e f overvoltages are expected install overvoltage arresters Power supply and current signal are carried on the same two wire cable The voltage supply range can differ depending on the instrument version The data for power supply are specified in chapter Technical data Provide a reliable separation between the supply circuit and the mains circuits according to DIN VDE 0106 part 101 Keep in mind the f
4. 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 6 Set up with the indicating and adjustment module Setup Max adjustment Further set tings False sig nal suppression Bis Proceed as follows 1 Select with gt the menu item max adjustment and confirm with OK Setup Max adjustnent Vessel type Vessel height Me range 100 00 Max adjustnent Min adjustment 0 000 n Damping 1 971 m 2 Prepare the percentage value for editing with OK and set the cursor to the requested position with gt Max adjustment 5100 00 10 00 110 00 ee o 3 Get the requested percentage value with and save with OK The cursor jumps now to the distance value Max adjustment 10 000 0 000 75 000 EA Li 4 Enter the appropriate distance value in m corresponding to the percentage value for the full vessel Keep in mind that the max level must lie below the min distance to the antenna edge 5 Save settings with OK Further settings The following circumstances cause interfering reflections and can influence the measurement e High sockets e Vessel installations such as struts e Agitators e Buildup or welded joints on vessel walls Note A false signal suppression detects marks and saves these false signals so that they are no longer taken into account for level measurement This should be done with a low level so that possible interfe
5. 30 6 3 Parameter adjustment 31 6 4 Saving the parameter adjustment data 38 7 Diagnosis fault rectification and service 7 1 Maintenance 40 7 2 Error messages according to NE 107 40 7 3 Rectify malfunctions 1ssssss siasa 42 7 4 How to proceed in case of repair 42 2 MBA PULS 300 e 4 20 mA HART two wire 802001 N3 F789 36824 EN 100208 Contents amp 8 Dismounting 8 1 Dismounting Steps 8 2 DISPOSE aaa ne Fee ee aE 9 Supplement 9 1 Technical data 9 2 Dimensions 1 1 2 2 slaka ka aaa Safety instructions for Ex areas Please note the Ex specific safety information for installation and operation in Ex areas These safety instructions are part of the operating instructions manual and come with the Ex approved instruments MBA PULS 300 e 4 20 mA HART two wire 1 About this document MBA 1 About this document 1 1 Function This operating instructions manual provides all the information you need for mounting connection and setup as well as important instructions for maintenance and fault rectification Please read this information before putting the instrument into operation and keep this manual accessible in the immediate vicinity of the device 1 2 Target group This operating instructions manual is directed to trained qualified personnel The contents of this manual should be made availa
6. E E E r MA 8 M20x1 5 M20x1 5 CF Te 1 2 NPT M20x1 5 D 1 2 NPT 1 Single chamber version Double chamber version MBA PULS 300 e 4 20 mA HART two wire 51 9 Supplement MBA MBA PULS 300 version with mounting strap 125 mm 4 92 2 5 mm 0 10 1 4301 Ve A EES re L II a Lege ee PBT GF30 E ire EN PP E 9 mm E 0 35 N oS ei 2 E K E 12mm gt 0 47 Fig 32 MBA PULS 300 version with mounting bracket 170 or 300 mm in length 52 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 9 Supplement MBA PULS 300 version with compression flange 2 e E als En ca E a 107 mm 021 mm ss 4 21 0 83 ele ER ojo 75 mm 2 95 115 mm 4 53 156 mm 6 14 200 mm 7 87 Fig 33 MBA PULS 300 compression flange DN 80 3 7JIS80 MBA PULS 300 e 4 20 mA HART two wire 53 9 Supplement MBA PULS 300 version with adapter flange MBA mm D k d DN100 PN16 220 180 18 8x45 360 DN150 PN16 285 240 22 8x45 360 ASME 4 1
7. CED WEE MBA PULS 300 4 20 mA HART two wire Document ID 36824 Contents MBA Contents 1 About this document 1 1 FUNGON nes ade nn 4 1 2 Target group u ee rte cha nisin is 4 1 3 Symbolism use 4 2 For your safety 2 1 Authorised personnel 5 2 2 Appropriate use 5 2 3 Warning about misuse 5 2 4 General safety instructions 5 2 5 CE conformity 2 2 22 onen 6 2 6 Fulfillment of NAMUR recommendations 6 2 7 Radio approval for Europe 6 2 8 Radio approval for USA Canada 6 3 Product description SI Configuration u hw da ee eee ees 7 3 2 Principle of operation 0004 7 3 3 Packaging transport and storage 8 3 4 Accessories and replacement parts 8 4 Mounting 4 1 General instructions 0 04 9 4 2 Collar or adapter flange 9 4 3 Mounting strap esasan aaua aaea 10 4 4 Mounting instructions 12 5 Connecting to power supply 5 1 Preparing the connection 23 5 2 Connection 0 cece eee eee ee eens 24 5 3 Wiring plan single chamber housing 25 5 4 Wiring plan double chamber housing 25 5 5 Wiring plan with double chamber housing Ex d 27 5 6 Switch on phase ssssssa aaa 27 6 Set up with the indicating and adjustment module 6 1 Insert indicating and adjustment module 29 6 2 Adjustment system
8. 8 Recommended socket mounting 14 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 4 Mounting mo If the medium has good reflective properties MBA PULS 300 can also be mounted on a longer socket piece Recommended values for socket heights are specified in the following illustration You must carry out a false echo storage afterwards The below charts specify the max socket piece length h depending on the diameter d Socket diameter d Socket length h 80 mm 300 mm 100 mm 400 mm 150 mm 500 mm Socket diameter d Socket length h 3 11 8 in 4 15 8 in 19 7 in Tip In new facilities it is useful to incline the vessel socket in the direction of the outlet False reflections from the vessel wall are thus reduced and measurement all the way down to the bottom of the conical outlet is possible MBA PULS 300 e 4 20 mA HART two wire 15 4 Mounting Orientation Fig 10 Alignment in silos To detect nearly the complete vessel volume the sensor should be directed in such a way that the measuring beam reaches the lowest level in the vessel i e the outlet 16 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 4 Mounting Fig 11 Mounting in open vessel MBA PULS 300 e 4 20 mA HART two wire 17 4 Mounting MBA
9. Radar sensor with mounting strap The strap is supplied unassembled and must be screwed to the sensor before setup with three hexagon nuts M5x10 and spring washers Max torque see chapter Technical data Required tools Allen wrench size 4 There are two ways to screw the strap onto the sensor Depending on the selected version the sensors can be swivelled in the strap as follows e Single chamber housing Angle of inclination 180 infinitely variable Angle of inclination in three steps 0 90 and 180 e Double chamber housing Angle of inclination 90 infinitely variable Angle of inclination in two steps 0 and 90 MBA PULS 300 e 4 20 mA HART two wire 11 4 Mounting Polarisation plane Fig 5 Turning by fastening in the centre 4 4 Mounting instructions The emitted radar pulses of MBA PULS 300 are electromagnetic waves They thus have electrical and magnetical components that are perpendicular to each other The polariation plane is defined by the direction of the electrical component With radar sensors the polarisation can be used to considerably reduce the effect of false 12 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 4 Mounting Mounting position Inflowing medium echoes by turning the instrument in the connection flange or mounting boss The position of the polarisation plane is marked on the
10. instrument Fig 6 Position of the polarisation plane of MBA PULS 300 1 Marking bars Mount the instrument at least 200 mm 7 874 in away from the vessel wall If you cannot keep this distance you should carry out a false echo storage before setup This applies mainly if buildup on the vessel wall is expected In this case we recommend repeating a false echo storage later with existing buildup Mounting should not be too close to the inflowing material as the microwave signal will be interferred The optimum mounting position is on the opposite of the filling To avoid strong pollution the distance to the filter or dust extraction must be as big as possible MBA PULS 300 e 4 20 mA HART two wire 13 4 Mounting Socket pie Fig 7 Mounting of the radar sensor with inflowing medium A corresponding collar flange for DN 80 ASME 3 or JIS 80 as well as a suitable adapter flange are available for mounting MBA PULS 300 With the housing versions plastic aluminium single chamber and stainless steel the collar flange can be placed directly over the housing With the aluminium double chamber housing retroactive mounting in this way is not possible the mounting type must be specified with the order Information The socket should be as short as possible and the socket end should be rounded Interfering reflections from the vessel socket are thus minimised Fig
11. 49 21 ft up to 15 m 49 21 ft 50 mm 1 969 in Output variable 4 20 mA HART Output signal Cycle time measuring cycle approx Standard electronics Electronics with increased sensitivity Signal resolution Residual ripple Failure signal current output adjustable Max output current Starting current Load Damping 63 of the input variable HART output values according to HART 7 02 PV Primary Value SV Secondary Value 0 5 s 1s 0 3 pA 0 4 pA mA value unchanged 20 5 mA 22 mA lt 3 6 mA 22 mA lt 3 6 mA lt 10 mA for 5 ms after switching on see load diagram under Power supply D 999 s adjustable Distance to the level Level as percentage value 1 In products with low dielectric value up to 50 cm 19 69 in 2 Default values can be assigned individually MBA PULS 300 e 4 20 mA HART two wire 45 9 Supplement MBA TV Third Value QV Fourth Value Resolution digital Accuracy similar to DIN EN 60770 1 Linearised percentage value Scaled measured value lt 1 mm 0 039 in Process reference conditions according to DIN EN 61298 1 Temperature Relative humidity Air pressure Installation reference conditions Min distance to installations Reflector False reflections Deviation with liquids 18 30 C 64 86 F 45 75 860 1060 mbar 86 106 kPa 12 5 15 4 psig gt 200 mm
12. By activating the appropriate curve the volume percentage of the vessel is displayed correctly If the volume should not be displayed in percent but e g in or kg a scaling can be also set in the menu item Display 36 MBA PULS 300 e 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 6 Set up with the indicating and adjustment module Additional settings Re set Additional adjustments Linearization curve Setup Instrument units Display False signal suppression z Diagnostics Linearization curve Linear v GREENE PIN Info Date Time o v EEG Venturi trapezoidal weir Horiz cylinder U Notch triangle weir Sphere Palmer Bowlus Flune Venturi trapezoidal weir Linear F Enter the requested parameters via the appropriate keys save your settings and jump to the next menu item with the ESC and gt key Caution If the instrument is used as part of an overfill protection system according to WHG Water Resources Act please note the following If a linearisation curve is selected the measuring signal is no longer compulsorily linear proportional to the level This must be taken into consideration by the user particularly when adjusting the switching point on the level switch With a reset all settings despite a few exceptions will be reset The exceptions are PIN language lighting SIL and HART mode Additional adjustnents Reset Reset PIN F
13. Ex factory Electronics temperature measurement Resolution Accuracy e 1xcable entry M20 x 1 5 cable 5 9 mm 1 x blind stopper M20 x 1 5 1 x blind stopper M16 x 1 5 or optional x plug M12 x 1 for external indicating and adjustment unit or e 1x closing cap NPT 1 x blind stopper 1 2 NPT 1 x blind stopper M16 x 1 5 or optionally 1 x plug M12 x 1 for external indicating and adjustment unit or e 1 x plug depending on the version 1 x blind stopper M20 x 1 5 1 x blind stopper M16 x 1 5 or optionally9 1 x plug M12 x 1 for external indicating and adjustment unit 0 2 2 5 mm AWG 24 14 0 2 1 5 mm AWG 24 16 through the sensor LC display in dot matrix 4 keys IP 20 IP 40 ABS Polyester foil Day Month Year 12 h 24 h CET 1 C 1 8 F 1 C 1 8 F Voltage supply Operating voltage n Only with Ex d version 8 Only with Ex d version 9 Only with Ex d version 48 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 9 Supplement _ Non Ex instrument 9 6 36 V DC Ex ia instrument 9 6 30 V DC Ex d ia instrument 14 36 V DC Operating voltage with lighted indicating and adjustment module Non Ex instrument 16 36 V DC Ex ia instrument 16 30 V DC Ex d ia instrument 20 36 V DC Interpolation protection Available Permissible residual ripple Non Ex Ex ia instrument for96 V l
14. acte Ses Date Tine Select Basic settings reset ee False signal suppression Peak val measurement HART operation mode Copy sensor settings The following reset functions are available Delivery status Restoring the parameter settings at the time of shipment from the factory A created false signal suppression user programmable linearization curve as well as the measured value memory will be deleted Basic settings Resetting the parameter settings incl special and laboratory parameters to the default values of the respective instrument A created false signal suppression user programmable linearization curve as well as the measured value memory will be deleted Setup Resetting of the parameter settings to the default values of the respective instrument in the menu item Setup Order related settings remain but are not taken over into the current parameters User generated false signal suppression user programmed linearization curve measured value memory as well as event memory remain untouched The linearization is set to linear False signal suppression Deleting a previously created false signal suppression The false signal suppression created in the factory remains active MBA PULS 300 e 4 20 mA HART two wire 37 6 Set up with the indicating and adjustment module MBA Pointer distance Resetting the measured min and max distances to the actual measured value The following table shows the
15. conditions is increased considerably Independent from this the min adjustment must be carried out Setup Vessel height Meas range 35 000m ssel type Vessel height Me range Max adjustment Enter the requested parameters via the appropriate keys save your settings with OK and jump to the next menu item with the ESC and the gt key Also the vessel form can influence the measurement apart from the medium and the application To adapt the sensor to these measure ment conditions this menu item offers you different options for vessel bottom and ceiling in case of certain applications Setup Vessel type Vessel bottom Medium Vessel top ll Dished boer bel v Vessel type Conical Vessel botton Angular Dished boiler v Vessel height Me range Max adjustment Vessel top Straight waDished boiler MBA PULS 300 e 4 20 mA HART two wire 33 6 Set up with the indicating and adjustment module MBA Setup Adjustment Setup Min adjustment Enter the requested parameters via the appropriate keys save your settings with OK and jump to the next menu item with the ESC and the gt key As a radar sensor is a distance measuring instrument the distance from the sensor to the product surface is measured To have the real product level displayed an allocation of the measured distance to the percentage height must be made To carry out this adjustment the distance
16. default values of the instrument Depending on the instrument version not all menu items are available or differently assigned Menu item Default value Medium Liquid Water Silo Bulk solid Application Storage tank Vessel height Max measuring range see Techni cal data in the supplement Vessel form Vessel bottom dished boiler end Vessel top dished boiler end Distance min ad Max measuring range see Techni justment cal data in the supplement Distance max 0 000 m d adjustment Damping 0 0 s Current output Min current 4 mA max current 20 mA Further settings Displayed value Distance Display unit m Scaling 0 00 01 100 00 100 Linearisation linear curve Distance unit m Temperature unit C Probe length Length of the standpipe Ex factory 6 4 Saving the parameter adjustment data It is recommended noting the adjusted data e g in this operating instructions manual and archive them afterwards They are hence available for multiple use or service purposes If the instrument is equipped with an indicating and adjustment module the data in the sensor can be saved in the indicating and adjustment module The procedure is described in the operating 38 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 6 Set up with the indicating and adjustment module instructions manual Indicating and adjustment modul
17. is entered with full and empty vessel If these values are not known an adjustment with the distance values e g 10 and 90 is also possible Starting point for these distance specifications is always the seal surface of the thread or flange By means of these settings the real level is calculated The real product level during this adjustment is not important because the min max adjustment is always carried out without changing the product level These settings can be made ahead of time without the instrument having to be installed Proceed as follows 1 Select the menu item Setup with gt and confirm with OK Now select with gt the menu item Min adjustment and confirm with OK Setup Min adjustment 0 00 35 000m 1 971 m Vessel height Me range Max adjustment Min adjustment Damping Current output node 2 Edit the percentage value with OK and set the cursor to the requested position with gt J Min adjustnent H000 00 10 00 110 00 3 Get the requested percentage value with and save with OK The cursor jumps now to the distance value Min adjustment 145 000 0 000 75 000 ZZ 4 Enter the suitable distance value in m for the empty vessel e g distance from the sensor to the vessel bottom corresponding to the percentage value 5 Save settings with OK and move with ESC and gt to the max adjustment 34 MBA PULS 300 4
18. process conditions such as e g pressure in the vessel high temperatures corrosive or toxic products etc Take note of chapters Mounting and Connecting to power supply and carry out the listed steps in reverse order 8 2 Dispose The instrument consists of materials which can be recycled by specialised recycling companies We use recyclable materials and have designed the electronics to be easily separable WEEE directive 2002 96 EG This instrument is not subject to the WEEE directive 2002 96 EG and the respective national laws Pass the instrument directly on to a specialised recycling company and do not use the municipal collecting points These may be used only for privately used products according to the WEEE directive Correct disposal avoids negative effects to persons and environment and ensures recycling of useful raw materials Materials see chapter Technical data If you have no possibility to dispose of the old instrument professionally please contact us concerning return and disposal MBA PULS 300 e 4 20 mA HART two wire 43 9 Supplement 9 Supplement 9 1 Technical data General data 316L corresponds to 1 4404 or 1 4435 Materials wetted parts Adapter flange Seal adapter flange Antenna Focussing lens Materials non wetted parts Compression flange Mounting strap Fixing screws mounting strap Fixing screws adapter flange Plastic housing Aluminium die casting housing St
19. the adjusted error current until a plausible measured value is found MBA PULS 300 e 4 20 mA HART two wire 27 5 Connecting to power supply MBA Then the corresponding current is outputted to the signal cable The value corresponds to the actual level as well as the settings already carried out e g factory setting 28 MBA PULS 300 e 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 6 Set up with the indicating and adjustment module 6 Set up with the indicating and adjustment module 6 1 Insert indicating and adjustment module Mount Dismount indicat The indicating and adjustment module can be inserted into the sensor ing and adjustment and removed again at any time It is not necessary to interrupt the module power supply Proceed as follows 1 Unscrew the housing cover 2 Place the indicating and adjustment module in the desired position on the electronics you can choose any one of four different positions each displaced by 90 3 Press the indicating and adjustment module onto the electronics and turn it to the right until it snaps in A Screw housing cover with inspection window tightly back on Removal is carried out in reverse order The indicating and adjustment module is powered by the sensor an additional connection is not necessary Fig 26 Insert indicating and adjustment module MBA PULS 300 e 4 20 mA HART two wire 29 6 Set up with the ind
20. voltage turbed briefly The following table shows the codes and text messages of the status message Function check and provides information on causes as well as corrective measures MBA PULS 300 e 4 20 mA HART two wire 41 7 Diagnosis fault rectification and service MBA Reaction when malfunc tions occur Fault rectification Reaction after fault rec tification Text mes Cause Removal sage C700 Simulation active Finish simulation Simulation Wait for the automatic end after 60 mins 7 3 Rectify malfunctions The operator of the system is responsible for taking suitable measures to rectify malfunctions The first measures to be taken are to check the output signal as well as to evaluate the error messages via the indicating and adjustment module Further comprehensive diagnostics can be carried out on a PC with the software PACTware and the suitable DTM In many cases the causes can be determined this way and faults rectified Depending on the failure reason and measures taken the steps described in chapter Set up must be carried out again if necessary 7 4 How to proceed in case of repair If it is necessary to repair the instrument please contact the responsible MBA agency 42 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 8 Dismounting 8 Dismounting 8 1 Dismounting steps Warning Before dismounting be aware of dangerous
21. 50psi 228 6 190 5 19 1 8x45 360 ASME 6 150psi 279 4 241 3 22 4 8x45 360 JIS DN100 10K 210 175 19 8x45 360 JIS DN150 10K 280 240 23 8x45 360 inch DN100 PN16 8 66 8x45 360 DN150 PN16 11 22 8x45 360 138 mm 5 43 31mm 1 22 ASME 4 150psi 9 00 8x45 360 ASME 6 150psi 11 00 8x45 360 JIS DN100 10K 8 27 8x45 360 JIS DN150 10K 11 02 8x45 360 15mm 0 59 20 mm 0 79 8mm 0 32 75 mm 2 95 98 mm 3 86 115 mm 4 53 126 mm 4 96 k D Fig 34 MBA PULS 300 adapter flange DN 100 DN 150 1 Adapter flange 2 Seal 54 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 EL Index INDEX A Adjustment 34 Max adjustment 35 Min adjustment 34 Adjustment system 30 Agitator 20 Application Bulk solid 33 Liquid 32 Standpipe 33 C Cable screening 23 Connection cable 23 D Default values 38 E Electronics and connection compartment with single chamber housing 25 Electronics compartment double chamber housing 26 27 Equipment Indicating and adjustment module 8 F Fault rectification 42 Functional pri
22. 6 F Application conditions process conditions Process temperature measured on the 40 80 C 40 176 F process fitting Vessel pressure 1 2 bar 100 200 kPa 14 5 29 0 psig Vibration resistance mechanical vibrations with 4 g and 5 100 Has Electromechanical data version IP 66 IP 67 and IP 66 IP 68 0 2 bar Cable entry plug Single chamber housing e 1x cable gland M20 x 1 5 cable 5 9 mm 1 x blind stopper M20 x 1 5 or e 1x closing cap M20 x 1 5 1 x blind stopper M20 x 1 5 or e 1x closing cap NPT 1 x blind plug 1 2 NPT or e 1 x plug depending on the version 1 x blind stopper M20 x 1 5 4 Time span after a sudden level change until the output signal has taken for the first time 90 of the final value IEC 61298 2 5 Tested according to the regulations of German Lloyd GL directive 2 8 Depending on the version M12 x 1 according to DIN 43650 Harting 7 8 FF MBA PULS 300 e 4 20 mA HART two wire 47 9 Supplement MBA Double chamber housing Spring loaded terminals for wire cross section Massive wire cord Cord with cable end sleeve Indicating and adjustment module Voltage supply and data transmission Indication Adjustment elements Protection rating unassembled mounted into the sensor without cover Materials Housing Inspection window Integrated clock Date format Time format Time zone
23. 7 874 in Corner reflector Biggest false echo 20 dB smaller than the useful echo See following diagrams UE 10 mm 0 394 in J 2 mm 0 079 in Pp en 0 H 2mm 0 079in4 ee 1 0m I 3 280 ft 10 mm 0 394 in DO Fig 29 Deviation under reference conditions 1 Reference plane 2 Antenna edge 3 Recommended measuring range Deviation with bulk solids Reproducibility The values are considerably application depend ent Firm specifications are hence not possible lt 1 mm Characteristics and performance data Frequency Beam angle 3 dB K band 26 GHz technology 10 3 Corresponds to the range with 50 of the emitted power 46 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 9 Supplement Step response time gt 1 s dependent on the parameter setting Max level change 1 m min Max emitted HF power of the antenna system Pulse peak power lt 10 mW Pulse duration lt 2ns Average power lt 25 uW Average power with 1 m distance lt 1 W cm Influence of the ambient temperature to the sensor electronics Temperature drift 0 03 10 K relating to the 16 mA span max 0 3 Temperature drift Digital output 3 mm 10 K relating to the max measuring range or max 10 mm Ambient conditions Ambient storage and transport temperature 40 80 C 40 17
24. ART two wire 23 5 Connecting to power supply MBA Connection technology Connection procedure T 5 2 Connection The connection of the voltage supply and the signal output is carried out via the spring loaded terminals in the housing The connection to the indicating and adjustment module or to the interface adapter is carried out via contact pins in the housing Proceed as follows Unscrew the housing cover 2 If an indicating and adjustment module is installed remove it by turning it slightly to the left 3 Loosen compression nut of the cable entry 4 Remove approx 10 cm 4 in of the cable mantle strip approx 1 cm 0 4 in of insulation from the ends of the individual wires 5 Insert the cable through the cable gland into the sensor Fig 20 Connection steps 5 and 6 6 Insert the wire ends into the terminals according to the wiring plan Information Solid cores as well as flexible cores with cable end sleeves are inserted directly into the terminal openings In case of flexible cores without end sleeves press the terminal head with a small screwdriver the terminal opening is freed When the screwdriver is released the terminal closes again 7 Check the hold of the wires in the terminals by lightly pulling on them 24 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 5 Connecting to power supply pie amp Electronics and connec tion comp
25. ainless steel housing precision cas ting Stainless steel housing electropolished Seal between housing and housing cover Inspection window in housing cover optional Ground terminal Process fittings Flanges Weight depending on process fitting and housing material Max torque mounting screws strap on the sensor housing Max torque for NPT cable glands and Conduit t Plastic housing Aluminium Stainless steel housing PPH PPH PBT GF 30 FKM Viton PPH 316L 316L 304 plastic PBT Polyester Aluminium die casting AlSi10Mg powder coated basis Polyester 316L 316L NBR stainless steel housing investment casting silicone Aluminium plastic housing stainless steel housing electro polished Polycarbonate 316L DIN from DN 80 ANSI from 3 JIS from DN 100 10K 0 7 3 4 kg 1 543 7 496 Ibs 4 Nm ubes 10 Nm 7 376 Ibf ft 50 Nm 36 88 Ibf ft Input variable Measured variable Distance between process fitting sensor and product surface The reference plane is the seal surface of the flange 44 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 EL 9 Supplement Fig 28 Data of the input variable Reference plane Measured variable max measuring range Antenna length Useful measuring range AWD Max measuring range Recommended measuring range Min distance from antenna end up to 15 m
26. al connection to the connection compartment 2 For indicating and adjustment module or interface adapter Fig 23 Connection compartment double chamber housing 1 Voltage supply Signal output 2 For indicating and adjustment module or interface adapter 3 Ground terminal for connection of the cable screen 26 MBA PULS 300 e 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 EL 5 Connecting to power supply Electronics compart ment Connection compart ment 5 5 Wiring plan with double chamber housing Ex d 5 6 17 8 I eh D He Fig 24 Electronics compartment double chamber housing 1 Internal connection to the connection compartment 2 For indicating and adjustment module or interface adapter 3 Internal connection to the plug connector for external indicating and adjustment unit optional Fig 25 Connection compartment double chamber housing Ex d 1 Voltage supply Signal output 2 Ground terminal for connection of the cable screen 5 6 Switch on phase After connecting the instrument to power supply or after a voltage recurrence the instrument carries out a self check for approx 30 seconds e Internal check of the electronics e Indication of the instrument type the software version as well as the measurement loop name e Output signal jumps to
27. artment 8 Connect the screen to the internal ground terminal connect the outer ground terminal with potential equalisation 9 Tighten the compression nut of the cable entry The seal ring must completely encircle the cable 10 Screw the housing cover on The electrical connection is finished Information The terminal block is pluggable and can be removed from the electronics For this purpose lift the terminal block with a small screwdriver and pull it out When inserting the terminal block again you should hear it snap in 5 3 Wiring plan single chamber housing The following illustration applies to the non Ex as well as to the Ex ia version oo Fig 21 Electronics and connection compartment with single chamber housing Voltage supply Signal output For indicating and adjustment module or interface adapter For external indicating and adjustment unit Ground terminal for connection of the cable screen A amp M 5 4 Wiring plan double chamber housing The following illustrations apply to the non Ex as well as to the Ex ia version MBA PULS 300 e 4 20 mA HART two wire 25 5 Connecting to power supply Electronics compart ment Connection compart ment MBA 4 20MA ad Rz GI GO 5 6 7 8 D H L Fig 22 Electronics compartment double chamber housing 1 Intern
28. as well as possible supplementary instructions 2 3 Warning about misuse Inappropriate or incorrect use of the instrument can give rise to application specific hazards e g vessel overfill or damage to system components through incorrect mounting or adjustment 2 4 General safety instructions This is a state of the art instrument that fulfils the prevailing regulations and guidelines The instrument must only be operated in a technically flawless and reliable condition The operator is responsible for the trouble free operation of the instrument During the entire duration of use the user is obliged to determine the compliance of the required occupational safety measures with the current valid rules and regulations and also take note of new regulations The safety instructions in this operating instructions manual the national installation standards as well as the valid safety regulations and accident prevention rules must be observed by the user For safety and warranty reasons any invasive work on the device beyond that described in the operating instructions manual may be carried out only by personnel authorised by the manufacturer Arbitrary conversions or modifications are explicitly forbidden The safety approval markings and safety tips on the device must be also observed MBA PULS 300 e 4 20 mA HART two wire 5 2 For your safety EL Depending on the instrument version the emitting frequencies are in th
29. ble to these personnel and put into practice by them 1 3 Symbolism used Information tip note This symbol indicates helpful additional information Caution If this warning is ignored faults or malfunctions can result Warning If this warning is ignored injury to persons and or serious damage to the instrument can result Danger If this warning is ignored serious injury to persons and or destruction of the instrument can result Ex applications This symbol indicates special instructions for Ex applications List The dot set in front indicates a list with no implied sequence Action This arrow indicates a single action Sequence Numbers set in front indicate successive steps in a procedure MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 2 For your safety 2 For your safety 2 1 Authorised personnel All operations described in this operating instructions manual must be carried out only by trained specialist personnel authorised by the plant operator During work on and with the device the required personal protective equipment must always be worn 2 2 Appropriate use MBA PULS 300 is a sensor for continuous level measurement You can find detailed information on the application range in chapter Product description Operational reliability is ensured only if the instrument is properly used according to the specifications in the operating instructions manual
30. e in the menu item Copy sensor data The data remain there permanently even if the sensor power supply fails The following data or settings for adjustment of the indicating and adjustment module are saved e All data of the menu Setup and Display e Inthe menu Additional settings the items Distance unit temperature unit and linearization e The values of the user programmable linearization curve The function can be also used to transfer settings from one instrument to another instrument of the same type If it is necessary to exchange a sensor then the indicating and adjustment module is inserted into the replacement instrument and the data are also written into the sensor via the menu item Copy sensor data MBA PULS 300 e 4 20 mA HART two wire 39 7 Diagnosis fault rectification and service MBA Failure failure 7 Diagnosis fault rectification and service 7 1 Maintenance When the device is used correctly no maintenance is required in normal operation 7 2 Error messages according to NE 107 The instrument has a self monitoring and diagnosis according to NE 107 and VDI VDE 2650 The following status messages can be outputted Failure Due to a malfunction in the instrument a failure message is outpuuted This status message is activated in the delivery status and cannot be deactivated by the user Function check The instrument is in operation the measured value is temporarily inval
31. e C or K band range The low emitting frequencies are far below the internationally approved limit values When used correctly no health impairment is expected 2 5 CE conformity The device fulfills the legal requirements of the applicable EC guidelines By attaching the CE mark we provide confirmation of successful testing 2 6 Fulfillment of NAMUR recommendations The device fulfills the requirements of the applicable NAMUR recommendations 2 7 Radio approval for Europe The instrument is approved according to EN 302372 2 2006 08 for use in closed vessels 2 8 Radio approval for USA Canada The radar sensor MBA PULS 300 with all antenna versions is FCC IC approved Modifications not expressly approved by the manufacturer will lead to expiry of the operating licence according to FCC IC The instrument is in conformity with part 15 of the FCC directives and fulfills the RSS 210 regulations Note the corresponding regulations for operation e The instrument must not cause any interfering emissions e The device must be insensitive to interfering immissions including those that may cause undesirable operating conditions The instrument is designed for operation with an antenna according to chapter Dimensions of this operating instructions manual with a max amplification of 33 dB The instrument must not be operated with antennas not listed therein or those having an amplification of more than 33 dB The required antenna imp
32. edance is 50 Q MBA PULS 300 e 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 EL 3 Product description 3 Product description 3 1 Configuration Type label The type label contains the most important data for identification and use of the instrument MBA PULS 300 gt VEGAPULS 67 Type PS67MGIBXXHAMAX ECEx DS 05 008 1suppl Ex ID A20 21 IP66 T A21 Process temperature 40 80 C Process pressure 1 2bar 100 200kPa Electronics 4 20mA HART Power supply 15 304 7 4 20mA HART Protection IP66 68 0 2bar Order no 2009 j VEGA 77761 Schiltach Germany s n 18012832 Fig 1 Structure of the type label example Instrument type Product code Approvals Process temperature process pressure Electronics Protection rating Order number Serial number of the instrument HONDUAROND Scope of delivery The scope of delivery encompasses e Radar sensor e Documentation this operating instructions manual Operating instructions manual Indicating and adjustment module optional Supplementary instructions manual Heating for indicating and adjustment module optional Supplementary instructions manual Plug connector for con tinuously measuring sensors optional Ex specific Safety instructions with Ex versions _ if necessary further certificates 3 2 Principle of operation Application area The MBA PULS 300 is particularly suitable for
33. ge the electronics Send instrument for repair F040 Error in the electronics Hardware defect Exchange the electronics Send instrument for repair General software error Separate operating voltage briefly Determine measured val ue The instrument is still in the start phase the measured value could not yet be determined Wait for the warm up phase Duration depending on the version and parameter ad justment up to approxi mately 3 min F125 Unpermissible electronics temperature Temperature of the elec tronics in the not specified section Check ambient tempera ture Isolate electronics Use instrument with higher temperature range F260 Error in the calibration Error in the calibration car ried out in the factory Error in the EEPROM Exchange the electronics Send instrument for repair F261 Error during setup Repeat setup Error in the False signal suppression Repeat reset configuration faulty Error when carrying out a reset F264 Adjustment not within the Check or correct installa Installation S vessel height measuring tion and or parameter ad etup error range justment Max measuring range of Use an instrument with the instrument not suffi bigger measuring range cient F265 Sensor does no longer e Check operating voltage Measurement carry out a measurement Carry out a reset function dis 9 Operating voltage too low Separate operating
34. icating and adjustment module MBA Key functions Adjustment system o 1 Note If you intend to retrofit the instrument with an indicating and adjustment module for continuous measured value indication a higher cover with an inspection glass is required 6 2 Adjustment system Fig 27 Indicating and adjustment elements 1 LC display 2 Adjustment keys e OK key Move to the menu overview Confirm selected menu Edit parameter Save value e gt key Presentation change measured value list entry Select editing position e key Change value of the parameter e ESC key interrupt input Jump to next higher menu The sensor is adjusted via the four keys of the indicating and adjustment module The LC display indicates the individual menu items The functions of the individual keys are shown in the above illustration Approx 10 minutes after the last pressing of a key an automatic reset to measured value indication is triggered Any values not confirmed with OK will not be saved 30 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 Main menu Setup Medium 6 Set up with the indicating and adjustment module bag 6 3 Parameter adjustment With the parameter adjustment the instrument is adapted to the application conditions The parameter adjustment is carried out via an adjustment menu Informa
35. id for example during simulation This status message is activatedin the delivery status and cannot be deactivated by the user Error codes and text messages are dispayed via the indicating and adjustment module during operation Information to the error statstics is displayed in the menu diagnosis under Device status in the indicating and adjustment module The following table shows the codes and text messages of the status message Failure and provides information on causes as well as corrective measures Code Cause Text mes sage Removal F013 Sensor does not detect an Check or correct installa no measured echo during operation tion and or parameter ad value avail Antenna system contami justment able nated or defective Clean or exchange process component or antenna F017 Adjustment not within e Change adjustment ac cording to the limit values difference between min and max gt 10 mm Adjustment specification span too small F025 Index markers are not e Check linearization table Error in the continuously rising for ex Delete table Create new linearization amle unlogical value pairs table 40 MBA PULS 300 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 7 Diagnosis fault rectification and service Function check Removal No operable software Failed or interrupted soft ware update Repeat software update Check electronics version Exchan
36. measurement of bulk solids in silos with up to 15 m height MBA PULS 300 e 4 20 mA HART two wire 7 3 Product description MBA Functional principle Packaging Transport Transport inspection Storage Storage and transport temperature Indicating and adjust ment module The antenna of the radar sensor emits short radar pulses with a duration of approx 1 ns These pulses are reflected by the product and received by the antenna as echoes The running time of the radar pulses from emission to reception is proportional to the distance and hence to the level The determined level is converted into an appropriate output signal and outputted as measured value 3 3 Packaging transport and storage Your instrument was protected by packaging during transport Its capacity to handle normal loads during transport is assured by a test according to DIN EN 24180 The packaging of standard instruments consists of environment friendly recyclable cardboard For special versions PE foam or PE foil is also used Dispose of the packaging material via specialised recycling companies Transport must be carried out under consideration of the notes on the transport packaging Nonobservance of these instructions can cause damage to the device The delivery must be checked for completeness and possible transit damage immediately at receipt Ascertained transit damage or concealed defects must be reported Up to the time of ins
37. nciple 8 G Gating out of false signals 35 Grounding 23 K Key function 30 L Linearisation curve 36 M Main menu 31 Medium Bulk solid 31 Moisture 9 N NAMUR NE 107 Failure 40 Function check 41 o Overfill protection according to WHG 37 P Potential equalisation 23 R Reflection properties 32 Reset 37 S Shielding 23 Status messages 40 T Type label 7 V Vessel form 33 Vessel height 33 Vessel installations 20 Voltage supply 23 MBA PULS 300 e 4 20 mA HART two wire 55 Druckdatum MBA MBA Instruments GmbH Friedrich List Str 5 25451 Quickborn Germany Phone 49 4106 123 888 1 Fax 49 4106 123 888 9 Email info mba instruments de www mba instruments de CE Die Angaben ber Lieferumfang Anwendung Einsatz und Betriebsbedingungen der Sensoren und Auswertsysteme entsprechen den zum Zeitpunkt der Drucklegung vorhandenen Kenntnissen 36824 EN 100208
38. ollowing additional influences on the operating voltage e Output voltage of the power supply unit can be lower under nominal load with a sensor current of 20 5 mA or 22 mA in case of fault message e Influence of additional instruments in the circuit see load values in chapter Technical data The instrument is connected with standard two wire cable without screen If electromagnetic interference is expected which is above the test values of EN 61326 for industrial areas screened cable should be used Use cable with round cross section A cable outer diameter of 5 9mm 0 2 0 35 in ensures the seal effect of the cable gland If you are using cable with a different diameter or cross section exchange the seal or use a Suitable cable gland We generally recommend the use of screened cable for HART multidrop mode If screened cable is necessary connect the cable screen on both ends to ground potential In the sensor the screen must be connected directly to the internal ground terminal The ground terminal on the outside of the housing must be connected to the potential equalisation low impedance If potential equalisation currents are expected the connection on the processing side must be made via a ceramic capacitor e g 1 nF 1500 V The low frequency potential equalisation currents are thus suppressed but the protective effect against high frequency inter ference signals remains MBA PULS 300 e 4 20 mA H
39. or heated vessels Make sure that all parts of the instrument exposed to the process in particular the antenna seal and process fitting are suitable for the existing process conditions These include above all the process pressure process temperature as well as the chemical properties of the medium You can find the specifications in chapter Technical data or on the type label 4 2 Collar or adapter flange A corresponding collar flange for DN 80 ASME 3 or JIS 80 as well as a suitable adapter flange are available for mounting MBA PULS 300 With the housing versions plastic aluminium single chamber and stainless steel the collar flange can be placed directly over the housing With the aluminium double chamber housing retroactive mounting in this way is not possible the mounting type must be specified with the order You can find drawings of these mounting options in chapter Dimensions MBA PULS 300 e 4 20 mA HART two wire 9 4 Mounting MBA Mounting strap Fig 2 Flange mounting of the radar sensor 4 3 Mounting strap The mounting strap enables easy mounting on the vessel wall or silo top It is suitable for wall ceiling or boom mounting Especially in open vessels this is a very easy and effective way to align the sensor to the bulk solid surface 10 MBA PULS 300 e 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 4 Mounting Fig 3
40. ring reflections can be detected Proceed as follows 1 Select the menu item Additional settins with gt and confirm with OK With gt you have to select the menu item False signal suppression and confirm with OK MBA PULS 300 e 4 20 mA HART two wire 35 6 Set up with the indicating and adjustment module MBA mo Further settings Lineari zation curve Additional adjustnents Date Time v 2 Confirm again with OK False signal suppression Change 3 Confirm again with OK and select with gt Create new False signal suppression Update Create new 4 Confirm again with OK and enter the actual distance from the sensor to the product surface 110 000 n 0 000 35 000 le nl 5 All interfering signals in this section are detected by the sensor and stored after confirming with OK Note Check the distance to the product surface because if an incorrect too large value is entered the existing level will be saved as false signal The filling level would then no longer be detectable in this area A linearization is necessary for all vessels in which the vessel volume does not increase linearly with the level e g with a cylindrical or spherical tank and the indication or output of the volume is required Corresponding linearization curves are preprogrammed for these vessels They represent the correlation between the level percentage and vessel volume
41. t y lt 14 V lt 0 7 Ver 16 400 Hz for18 Vu lt 36 V lt 1 0 Ver 16 400 Hz Permissible residual ripple Ex d ia instrument Tor 18 V lt u lt 36 V lt 1 Ver 16 400 Hz Load see diagram A 1200 927 750 4 500 250 4 Fig 30 Voltage diagram HART load Voltage limit Ex ia instrument Voltage limit non Ex Exd instrument Operating voltage ROMs Electrical protective measures Protection depending on housing version Plastic housing IP 66 IP 67 Aluminium housing stainless steel hou IP 66 IP 68 0 2 bar 19 sing investment casting stainless steel housing electro polished Aluminium and stainless housing in IP 66 IP 68 1 bar vestment casting optionally available 10 The prerequisites for maintaining the protection rating are a suitable cable as well as correct mounting MBA PULS 300 e 4 20 mA HART two wire 49 9 Supplement MBA Overvoltage category IN Protection class Il Approvals Instruments with approvals can have deviating technical data depending on the version For such instruments the corresponding approval documents must be noted 50 MBA PULS 300 e 4 20 mA HART two wire 80200 N3 F789 36824 EN 100208 MBA 9 Supplement 9 2 Dimensions Aluminium housing 116 mm 4 57 87 mm 3 43 84 mm 3 31 ar M16x1 5 5 2 N Li
42. tallation the packages must be left closed and stored according to the orientation and storage markings on the outside Unless otherwise indicated the packages must be stored only under the following conditions Not in the open Dry and dust free Not exposed to corrosive media Protected against solar radiation Avoiding mechanical shock and vibration Storage and transport temperature see chapter Supplement Technical data Ambient conditions e Relative humidity 20 85 3 4 Accessories and replacement parts The indicating and adjustment module is used for measured value indication adjustment and diagnosis It can be inserted into the sensor and removed at any time You find further information in the operating instructions Indicating and adjustment module Document ID 36825 MBA PULS 300 4 20 mA HART two wire 802001 N3 F789 36824 EN 100208 MBA 4 Mounting Moisture Suitability for the proc ess conditions 4 Mounting 4 1 General instructions Use the recommended cables see chapter Connecting to power supply and tighten the cable gland You can give your instrument additional protection against moisture penetration by leading the connection cable downward in front of the cable entry Rain and condensation water can thus drain off This applies mainly to outdoor mounting as well as installation in areas where high humidity is expected e g through cleaning processes or on cooled
43. this menu item MBA PULS 300 e 4 20 mA HART two wire 31 6 Set up with the indicating and adjustment module MBA Setup Application Setup Medium Measurement loop name Liquid v Solvent Application Chem mixtures Vessel type Water based be sed Vessel height Me range Medium Ballast pebbles w Powder dust Granular pellets v EVER SES Through this selection the sensor is adapted perfectly to the product and measurement reliability particularly in products with poor reflective properties is considerably increased Enter the requested parameters via the appropriate keys save your settings with OK and jump to the next menu item with the ESC and the gt key In addition to the medium also the application or the application place can influence the measurement With this menu item the sensor can be adapted to the applications The adjustment possibilities depend on the selection Liquid or Bulk solid under Medium Setup Measurement loop name Medium Vessel type Vessel height Me range The following options are available when Liquid was selected Application PR 3 5 ling tube Storage tank v Storage tank agitation v Bypass Storage tank on ships Plastic vessel Stirred vessel Dosing vessel h 2 Mob plastic vessel Open waters Application Mob plastic vessel Open waters Boren flue Rainwater overfall Denonstration
44. tion In this operating instructions manual the instrument specific parame ters are described Further general parameters are described in the operating instructions manual Indicating and adjustment module The main menu is divided into five areas with the following functions Display Diagnostics Additional adjustments Info Setup Settings for example to measurement loop name medium application vessel adjustment signal output Display Language setting settings for the measured value indication as well as lighting Diagnosis Information for example to the instrument status pointer reliability simulation echo curve Further settings Unit false signal suppression linearisation curve reset date time reset HART mode Info Instrument name hardware and software version calibration date instrument features In the main menu point Setup the individual submenu points should be selected subsequently and provided with the correct parameters to ensure the optimum adjustment of the measurement The procedure is described in the following Setup Each medium has different reflection properties With liquids further interfering factors are fluctuation product surface and foam generation With bulk solids these are dust generation material cone and additional echoes from the vessel wall To adapt the sensor to these different measuring conditions the selection Liquid or Bulk solid should be made in
45. useful echo Make sure when planning your measuring site that the radar sensor has a clear view to the measured product In case of existing vessel installations a false echo storage should be carried out during setup If large vessel installations such as struts or supports cause false echoes these can be attenuated through supplementary measures Small inclined sheet metal baffles above the installations scatter the radar signals and prevent direct interfering reflections Fig 15 Cover smooth profiles with deflectors Ifthere are agitators in the vessel a false signal suppression should be carried out with the agitators in motion This ensures that the interfering reflections from the agitators are saved with the blades in different positions 20 MBA PULS 300 4 20 mA HART two wire 802001 N3 F789 36824 EN 100208 MBA 4 Mounting Fig 16 Agitators Mounting in multiple The silo walls of multiple chamber silos are often made of profile walls chamber silo like e g profile sheeting to ensure the required stability If the radar sensor is mounted very close to a heavily structured vessel wall substantial interfering reflections can be generated Hence the sensor should be mounted at a large distance from the separating wall The optimum mounting position is on the outer wall of the silo with the sensor oriented towards the outlet in the silo center
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