EasyTREK SCD-300
Contents
1. Fixed output current With this step the output current can be set as a fix value selected between 3 8 mA and 20 5 mA Output current will be fixed until the value of P08 is programmed back to 0 again FACTORY DEFAULT 0 Value of distance level or volume assigned to 4 mA current output Value of distance level or volume assigned to 20 mA current output Values are interpreted according to P01 a Please note that in case of programming for LEV or VOL measurement the min and max value has to be entered in the relevant engineering units of LEV m ft or VOL m3 ft3 Assignments can be made so that the proportion between the change of the measured or calculated process value and the change of the current output be either direct or inverse E g lev 1m assigned to 4mA and lev 10m assigned to 20mA represents direct proportion and lev 1m assigned to 20mA and lev 10 m assigned to 4mA represents inverse proportion Level displa LEV A f 5 4 LEV 04 o 0 100 6 FACTORY DEFAULT P10 0 P11 Xu Xn See P04 and P05 Error indication by the current output In case of error the EasyTREK will provide one of the current outputs below for the time the failure prevails HOLD last value 3 6 mA FACTORY DEFAULT 0 BKI 06 ATEX 021X e scd3404a0600p_02 doc 21 36 5 4 3 RELAY OUTPUT P13 Relay functions Relay functions Also to set P14 P15 DIFFERENTIAL d the value2. be taken from its Installation and Programming Manual Continuous measuring is going on during programming in accordance with the last programmed parameter set This way the analogue output signal 4 20mA continuously represents the actual value The digital HART communication depends on the communication software The new modified parameter set will be valid after returning to measurement mode The device changes back to measurement mode automatically in 1 minute after programming through HART communication has been finished or discontinued BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 151 36 5 4 PARAMETERS DESCRIPTION AND PROGRAMMING 5 4 1 MEASUREMENT CONFIGURATION P00 cba Application Engineering Units ATTENTION Programming of this parameter will result in loading the factory default with the corresponding engineering units oe Fae ail Operating measurement mode 1 Free flowing solids level measurement Engineering units according to c according to c Metric US Calculation system a a Metre Ba as FACTORY DEFAULT 001 DEVICE CAN BE OPERATED WITH TWO DIFFERENT ENGINEERING UNIT SYSTEMS BUT FOR THE SAKE OF EASY OVERVIEW ONLY THE METRIC SYSTEM WILL BE USED BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 16 36 P01 ba Measurement Mode Values transmitted by HART protocol current output and the switching points of the relays w
3. e E EE QIRIVeICO NZ Gi EasyTREK SCD 300 compact ultrasonic level transmitter series for free flowing solids INSTALLATION and PROGRAMMING MANUAL 2nd edition amp gt co Manufacturer NIVELCO Process Control Co 1043 Budapest Dugonics u 11 Tel 36 1 889 0100 Fax 36 1 889 0200 E mail marketing nivelco com Wwww nivelco com BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 1136 BKI 06 ATEX 021X e scd3404a0600p_02 doc 2 36 PRINCIPLES OF ULTRASONIC LEVEL MEASUREMENT a Angle of repose Wy lt 9X G0d 40 anjen bold Di si 2112 Ki OI D Ig m s bs 5 ze E 2 F as Go o E 3 z 5 SIS d nn o mo Q 0 904 40 11 0 4 pu Jeq 0610 uoneaijdde v jo juawainseaw pawwesbold ax Burjaojq pua solo H p d 40 niPA ii uoneo dde y Jo ue sip Buunseaw Xe Ulxzg0d 40 anjea 11 7 ER Wx oue sip sa um Suen v abues Bunse wu Xe WX y0d Jo enen MNYAA Wy souelsip Bulinseaw pw BKI 06 ATEX 021X e scd3404a0600p_02 doc 3 36 CONTENTS A INTRODUCTION dene 5 2 TECHNICAL DATA sisisssiscsisccsscstesvacascasesuasaststasscvevstasedscatecnsnaseiveanaces 7 2c GENERALSDAT A eer eelere SEN b d 7 2 2 5PEC AL DATA La a 7 Kee Oe 8
4. 24 ORDER CODES aZ his y bn 8 ERT le dE 9 3 INSTALLATION BEN 10 IIIe 12 4 1 WIRING CONDITIONS cccscsescscscssesescscscsesessscscscseeveeeseseseseseenes 12 4 2 CONNECTION CABLE EXTENSION 12 5 PUTTING INTO OPERATION ADJUSTING PROGRAMMING 14 5 1 PUTTING INTO OPERATION iirinn iah 14 5 1 1 Status indication signals in measuring mode 15 5 2 SAFETY REGULATIONS OF THE EX APPROVED UNITS 15 5 3 PROGRAMMING tege eeneg ege 15 5 4 PARAMETERS DESCRIPTION AND PROGRAMMING 16 5 4 1 Measurement Contgouraion eee 16 8 4 2 GUITENt EE 21 5 4 3 Relay GOU asec bia essed 22 5 4 4 Measurement optimalization 23 5 4 5 Volume measurement 28 5 4 6 Lincarisation o bal 29 5 4 7 Informational parameters 30 5 4 8 Test parameters o 31 SAI ee EE KR BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 41 36 6 MAINTENANCE REPAIR 7 7 STORAGE 8 PARAMETER TABLE Thank you for choosing a NIVELCO instrument We are sure that you will be satisfied throughout its use 1 INTRODUCTION APPLICATION The EASYTREK SCD 300 series comp
5. data after recognising level value 0 with serial number other than 1 If the above conditions are not met error codes will be sent see chapter Error Codes Notice for further information about programming in reference to linearisation see user s manual of the EView software and MultiCONT process controller BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 29 36 5 4 7 NFORMATIONAL PARAMETERS P60 Overall operating hours of the unit h P61 Time elapsed since last switch on h P62 Operating hours of the relay h P63 Number of switching cycles of the relay h P64 Actual temperature of the transducer C F Broken loop of the thermometer will be indicated by Pt Error message that is initiated by a signal sent via HART In this case the transmitter will perform temperature correction corresponding to 20 C P65 Maximum temperature of the transducer C F P66 Minimum temperature of the transducer C F P70 Number of Echoes Echo Map Amplitude and position of the echoes can also be read out Notice for graphic display of the echoes use the EView software or a MultiCONT process controller BKI 06 ATEX 021X e scd3404a0600p_02 doc e 30 36 P71 Distance of the of Measuring Window P72 Amplitude of the selected echo dB lt 0 P73 Position of the selected echo time ms ms P74 Signal to Noise Ratio Ratio easement conditons Excelent Between 70
6. s as possible E gt MOUNTING see illustration of mounting options on the next page The EasyTREK consists of a sensor that is attached to the aiming arm a pipe with a ball joint housing incorporating a ball joint that is attached to the housing of the electronics It is recommended to mount the transmitter on the roof of the tank silo using a flange see drawing above The Ball joint housing has a screw hole diameter of 125 mm for fixing it For easy installation we recommend using our special flange with a split insertion available in four sizes of DN125 150 200 300 to be ordered separately Removing the split insertion the flange is to be put around the aiming arm and the ball joint housing is to be fixed to the split flange t is essential to use the washers and the bolts 4 pcs each delivered with the split flange The ball joint will be pressed to the housing by a spring allowing adjustment aiming The 4 pcs of M12 bolts have to be tightened only after completing the adjustments aiming BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 10 36 When the entire tilting range of the aiming arm is required the thickness of the roof can not exceed the values specified below The EasyTREK can also be mounted on existing manhole covers access lids or for instance on a steel structure lowered into a larger ex 0 5 x 0 5 m opening on the roof This solution is to be used with roofs thicker than 350 380 mm Diameter of the Maximum Thick
7. selected for controlling the relay ek Keep at least 2 cm LEVEL CONTROL increases over P14 relay energises difference between P14 P14 i dz and P15 Hysteresis control decreases below P15 relay de energises a z De energised 1 ERROR INDICATION no ECHO indicated by energised relay 2 no ECHO indicated by de energised relay FACTORY DEFAULT 2 AER Relay parameter Setpoint value FACTORY DEFAULT 0 P15 Relay parameter Setpoint value Relay set points are to be programmed for two point control Values should be set in the quantity selected for transmitting in parameter P01 Keep at least 20 mm difference between P14 and P15 FACTORY DEFAULT 0 P19 HART short address Short address is to enter here The 00 short address is suitable for loop with one device only when both analogue signal and HART is able to carry information For other settings see instruction in the manual for the configuration software EView supplied with the unit FACTORY DEFAULT P19 00 BKI 06 ATEX 021X e scd3404a0600p_02 doc 22136 5 4 4 MEASUREMENT OPTIMALIZATION P20 a Damping This parameter can be used for reduction of unvvanted fluctuation of the displayed value and the output Damping time s Granules Dust ping particle size 52 3 mm particle size 1 2 mm 0 we 177 CTForttetoy 51 3 Netrecommended Not recommended 521 6 Notrecommended _ Not re
8. 04a0600p_02 doc 6 33 36 8 Parameter TABLE Par P00 P01 P02 P03 P04 P05 P06 P07 P08 P09 P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 P23 P24 P25 P26 P27 Page 16 17 18 18 18 19 20 21 21 21 21 22 22 22 22 23 23 24 24 24 25 Description Application Engineering Units Measurement Mode Calculation units Values displayed Rounding Maximum Measuring Distance Minimum Measuring Distance Far End Blocking Fixed output current Transmitted value assigned to A mA Transmitted value assigned to 20 mA Error indication by the current output Relay functions Relay parameter Setpoint value Relay parameter Setpoint value HART short address Damping Angle of repose Target tracking speed Selection of Echo in the measuring window Level elevation rate Level descent rate BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 34136 Value dcba GEES Par P28 P29 P30 P31 P32 P33 P34 P35 P36 P37 P38 P39 P40 P41 P42 P43 P44 P45 P46 P47 P48 P49 P50 P51 P52 P53 P54 P55 Page 25 26 26 26 26 28 28 28 28 28 28 29 29 Description Echo loss indication Blocking out of disturbing object Sound velocity in different gases Specific gravity Manual echo selection Selection of tank shape open channel Dimensions of tank Op
9. 2 doc 6 35 36 scd3404a0600p_02 doc Oct 2006 Nivelco reserves the right to change technical data without notice BKI 06 ATEX 021X e scd3404a0600p_02 doc 36 36
10. 330 _ SCD 340 _ SCD 330 _ Ex SCD 340 _ Ex 106 0 SCD 31J _ SCD 31J _ Ex SCD 33J _ SCD 33J _ Ex 9 0 34 SCD 34J _ Ex Ball joint Housing view from above 765 725 BKI 06 ATEX 021X e scd3404a0600p_02 doc 91 36 3 INSTALLATION POSITIONING Selecting optimal location for the transmitter various considerations should be made If the measured material is granule material size gt 5 mm and the tank roof is dome shaped or conical do not install the transmitter in the centre of the tank silo In general the transmitter can be installed on the radius r 0 3 0 5 R Avoid that the 5 conical beam angle of the transmitter contact the tank silo wall In case the transmitter is mounted close to the wall it should be tilted See section Aiming Protect the transmitter electronics from overheating due to direct sunshine The same way no disturbing objects such as ladder grid thermometer etc should intrude into the beam cone Heavy air movement can make measurement more difficult or even unable Device should be protected against direct sunshine no to let its temperature increase into excessive range GRAVITY FILLING 2 PNEUMATIC FILLING Suggested location view from above Select a location where the speed of the in flowing Select a location that is as material is the smallest far away from the filling point
11. Distance quaternary value Temperature See P01 programming LED status signals on the unit GreenLED COM Lights up during HART programming Red LED ECHO Lights up when the device gets proper echoes 5 2 SAFETY REGULATIONS OF THE EX APPROVED UNITS Ex certified devices are approved for Zone 20 and Zone 21 areas Transmitters must not be installed in the dust path of the pneumatic filling Neither the device nor any part of it should be used as a flame proof barrier of a Zone 20 area The cable outside the unit should be fixed so that it is tension free The terminal box should be selected in accordance with the electrical class of the area As a result of the mounting arrangement of the unit the ambient temperature is equal to the process temperature The housing of the device should be connected to the EP network 5 3 PROGRAMMING HART interface of the EasyTREK enables full access and programming of the complete parameter set Parameters can be accessed by two ways with the aid of EView or Eview light configuration software run on PC by the Nivelco made MultiCONT multichannel controller This instruction describes parameters and features behind them but does not deal with technical details for their selection and editing of their values Compact Disk attached to the transmitter contains detailed information on the Eview configuration software to install on PC and its description Programming by the MultiCONT can
12. For measuring the level of the medium the greatest distance of the application H has to be programmed Minimum measuring distance Xm is the construction defined smallest distance within which measurement is not possible Dead Band see 5 3 Parameters P05 In special applications this range should be extended with programming close end blocking Maximum measuring distance Xu is the construction defined greatest distance which can be measured by the unit under ideal conditions No measurement is possible over this distance i e maximum distance of the application H must not be greater than Xm Under unfavourable circumstances such as bad reflection or heavy dusting of the material the measuring capability may be reduced to the half of the unit s best performance BKI 06 ATEX 021X e scd3404a0600p_02 doc 5 36 THE FOLLOWING TYPES OF APPLICATIONS ARE POSSIBLE DEPENDING ON THE COMMUNICATION AND WHAT THE OUTPUT SIGNAL IS USED FOR 1 Using the unit as a three or four wire current transmitter Normally we use the analogue 4 20 mA output signal of the EasyTREK The application parameters of the device are set through HART communication at installation right after installation or in a laboratory prior to installation In this case the short address of the device should stay the factory default P19 0 Using both current transmission and digital HART signal transfer in single transmitter systems Digital signal transfer is
13. Galvanic isolation protection against surge transients if no echo continuous 3 6 mA or 22 mA selectable with programming Output es Digital communication HART SPST 48 VAC 5A A12 Accuracy 0 2 of the measured distance 0 1 of the range 10mm 3 1000 s default 300 s 6 x2 5 mm 7 5 mm shielded cable standard length 3 m to order up to 30 m Electric protection Class 111 ngress protection IP65 Ex marking S ATEX II 1 D IP65 130 Under optimal circumstances of reflection and stabilised sensor temperature 2 2 SPECIAL DATA Tv 5 0 3411 4 5 0 33 4 5 0 31 4 5 0 341 1 8 5 0 33 8 58 0 3101 8 Ex Sensor face PVC foam Mass 3 5kg 3 5kg 6 5kg BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 7 36 2 3 ACCESSORIES nstallation and Programming Manual Certificate of VVarranty Declaration of Conformity EView Light configuration software and description on CD ACCESSORIES TO BE ORDERED Split flange order code SFA 3115 EvVlev configuration software CD 2 4 ORDER CODES Mounting Code Output 1 BSP nut o 4 20 mAtHART Relay 4 4 20 mA HART Relay Ex 8 EECHER ES 200 mm bracket LE 700mm bracket The order code of an Ex version should end in Ex BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 8 36 2 5 DIMENSIONS SCD 310 SCD 310 Ex SCD
14. MING THE SENSORS When the material to be measured is being filled or emptied because of the formation of an angle of repose the vertically installed transmitter will experience a weak signal This can be eliminated in most cases by tilting the unit so the aiming device is a very important part of these transmitters The proper aiming can be set and checked while the transmitter is being used desirably when the silo tank is almost empty Usually it is best that the transmitter points to the middle of the bottom of the silo tank In cases when the silo is narrow and the height diameter value equals to or is more than 5 tilting is usually not necessary Aiming should also be checked when the silo tank is full because the echo can be adversely weak even when coming from a nearby surface This usually happens when the angle of repose is big In this case an optimal solution must be found in which the echo coming from any distance is acceptable The SERVICE PARAMETERS that can be reached during programming provide help for set up That means that the aiming adjustment and the programming should be done at the same time BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 14 36 5 1 1 STATUS INDICATION SIGNALS IN MEASURING MODE HART respond signals The properly installed device with factory default settings gives the following responses to the COM3 universal HART command primary value Level secondary value Level tertiary value
15. T 00 Spherical tank P4 P41 45 Tank silo dimensions Standing eylindrical tank silo Standing eylindrical tank silo Standing rectangular tank silo with hemispherical bottom with conical bottom with or without chute P04 P41 P04 P41 For flat bottom P43 P44 and P45 0 aN b 1 P44 P40 bz3 bz2 P40 bz3 b 2 b 1 b 0 P04 P41 P42 FACTORY DEFAULT P41 P45 0 BKI 06 ATEX 021X e scd3404a0600p_02 doc 28 36 5 4 6 LINEARISATION P47 P48 a Linearisation Linearisation is the method of assigning requested calibrated or calculated level volume or flow to values measured by the transmitter It can be used for instance if the sound velocity is not known LEVEL LEVEL or in the case of tank with other shape than under 5 4 5 LEVEL VOLUME Linearisation OFF FACTORY DEFAULT ON Number of linearisation data pairs Number of linearisation data pairs entered in the table L Left column r Right column Level values measured Value assigned to transmit 41 mi 1 BIO ODO ul FACTORY DEFAULT 0 Conditions of correct programming of the data pairs table must always start with L 1 0 and r 1 value assigned to 0 level table must be ended either with the 32 data pair i e j 32 or if the linearisation table contains less than 32 data pairs j lt 32 it must be ended with a level value 0 e g L j lt 32 0 e The EasyTREK will ignore
16. act ultrasonic transmitters from NIVELCO are designed to measure the level of free flowing solids granules and powders The unit does not touch the material to be measured and does not include any moving parts Thus it is not exposed to mechanical loading no abrasive effect is expected and regular maintenance is not required A Total beam angle of 5 at 3 dB is a feature of all Nivelco s ultrasonic sensors designed for the level measurement of free flowing solids This uniquely narrow beam angle ensures reliable measurement in narrow silos with uneven side walls or sometimes even in the presence of dusting Furthermore as a result of the narrow beam angle the emitted ultrasonic signals have an outstanding focusing a sufficient signal penetration through dust is ensured PRINCIPLE OF OPERATION D The ultrasonic level metering technology is based on the principle of measuring 07m the time required for the ultrasound pulses to make a round trip from the sensor to the level to be measured and back 2m The sensor emits an ultrasonic pulse train and receives the echoes reflected The Diameters corresponding to the intelligent electronic device processes the received signals by selecting the 5 beam angle echoes reflected from the surface and calculates the distance from the time of sem flight between the sensor and the surface of the medium This is the basis for all 47m other output signals level or volume of the EasyTREK
17. also used beside the standard utilisation of the output current of the EasyTREK n this case there can be one or more devices in the current loop that use analogue signals with their total resistance being Rt 250 600 Q and one HART master device The short address of the EasyTREK should stay the factory default P19 0 This application can be achieved with using a PEO 100 or a PRO 10 type MultiCONT unit as the HART master which ensures the power supply of the EasyTREK too Simultaneous control of several EasyTREK transmitters with the help of a MultiCONT In this case all of the EasyTREK s keep the connection with the MultiCONT through HART communication only This means that the measurement values are collected in cycles and that the modifications of the transmitter settings are arbitrary The short addresses of the units are P19 1 15 All types of setting and programming tasks can be done through a MultiCONT BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 6 36 2 TECHNICAL DATA 2 1 GENERAL DATA EasyTREK SCD 300 4 EasyTREK SCD 300 8 Ex Aluminium Total beam angle 3dB 30 C 60 C 20 C 60 C Max surface temperature 130 C Process pressure absolute 0 07 0 11 MPa 0 7 1 1 bar Pabsotute 0 01MPa 0 1 bar difference between ambient and tank pressure Power supply consumption 1144 40V DC74 7VV 114 26 V AC 5 2VA 4 20 mA Rmax 600 ohm
18. and 50 Under 50 Unreliable P75 Blocking Distance This parameter gives information about the actual close end blocking distance provided automatic blocking was selected in P05 5 4 8 TEST PARAMETERS P96 Checksum P97 Software code Read only parameter P98 Hardware code Read only parameter P99 dcba Access lock by secret code The purpose of this feature is to provide protection against accidental programming of parameters or by a person not entitled The secret code can be any value other than 0000 Setting a secret code will automatically be activated when the EasyTREK is returned to the Measurement Mode In order to program locked device the secret code should be entered first in P99 Thus for entering a new code or erasing the old one the knowledge of the previous code is necessary BKI 06 ATEX 021X scd3404a0600p_02 doc 6 31 36 5 4 9 ERROR CODES lke Error description Causes and actions to be done i Contact local agent No Echo Bad reflection from the surface reflection not directed towards the sensor or Echo loss or echo too weak to evaluate due to dusting excessive sound absorption Check device selection and or Err2 adjustment Em Contact local agent Err4 Calculation overflow Check settings Code referring to sensor error or improper Verify sensor for correct operation and check for correct mounting Err5 i installation mounting level in the dead band according to Users Manual E
19. commended 53171 010 Notrecommended Not recommended 5417237 Appicatle Not recommended 5518827260 Recommended Applicable 6 10 Recommended Recommended 8 60 Recommended Recommended 9 100 Applicable Applicable FACTORY DEFAULT 7 3005 P23 Angle of repose repose formation This parameter is important for the optimalisation of the of the QUEST software echo evaluation Estimated angle of repose 0 No angle of repose o 0 LL em 52177 0665550 The optimal setting of this parameter can be done with the help of checking the echo strength in the read out parameter P72 indicating the echo amplitude in dB The ideal setting of P23 is at which the parameter value in P72 becomes the best nearest 0 FACTORY DEFAULT 0 BKI 06 ATEX 021X scd3404a0600p_02 doc 23 36 P24 P25 a P26 Target tracking speed With this parameter the evaluation can be sped up at the expense of the accuracy a Tracking speed Remark 0 Standard For most applications 1 Fat For fast changing level Special For very special cases only as this reduces the maximum measuring range to 50 of the nominal value p The measuring window P25 and P33 is inactive and the EasyTREK will respond practically instantly to any target FACTORY DEFAULT 0 Selection of Echo within the measuring window A so called measuring window is formed around the echo sig
20. en Channel Dimensions of tank Open Channel Dimensions of tank Open Channel Dimensions of tank Open Channel Dimensions of tank Open Channel Level pertaining to flow Q 0 Linearisation Linearisation table Value dcha Par P56 P57 P58 P59 P60 P61 P62 P63 P64 P65 P66 P67 P68 P69 P70 P71 P72 P73 P74 P75 P76 P77 Page 30 30 30 30 30 30 30 30 31 31 31 31 33 34 34 Description Overall operating hours of the unit Time elapsed after last switch on Operating hours of the relay Number of switching cycles of the relay Actual temperature of the transducer Maximum temperature of the transducer Minimum temperature of the transducer Echo Map Position of the measuring window Amplitude of the selected echo Position of the selected echo Signal noise ratio Blocking distance value Water head of the flow TOT1 volume flow totalised Value dchba Par P78 P79 P80 P81 P82 P83 P84 P85 P86 P87 P88 P89 P90 P91 P92 P93 P94 P95 P96 P97 P98 P99 Page 34 34 34 34 34 Description Value dcba TOT2 volume flow totalised Software code 1 Software code 2 Hardware code Access lock by secret code BKI 06 ATEX 021X e scd3404a0600p_0
21. he object from the transducer Use the Echo Map P70 to read out the precise distance of disturbing objects FACTORY DEFAULT 0 Sound velocity at 20 C m sec or ft sec depending on P00 c Use this parameter if the sound velocity in the gases above the measured surface differs largely from that of in air Recommended for applications where the gas is more or less homogeneous If it is not the accuracy of the measurement can be improved using the 32 point linearisation P48 P49 For sound velocities in various gases see section Sound Velocities FACTORY DEFAULT Metric P00 EU 343 8 m s US P00 US 1128 ft s Specific gravity If you enter value other than 0 of specific gravity in this parameter the weight will be displayed in EView instead of VOL FACTORY DEFAULT 0 Ikg dm3 or Ib ft depending on P00 c Manual echo selection by moving the Measuring Window A so called measuring window is formed around the echo signal See scheme on the next page The distance of the target will be calculated from the flight time in accordance with the position of the measuring window Use this parameter if the EasyTREK unambiguously selects a wrong echo for example the echo reflected from the surface is much weaker than the interfering one s see figure beside and on next page Enter the distance of the correct echo and the software will move the measuring window and calibrate itself to the echo found there T
22. ill be interpreted into the engineering units of the measured or calculated process value corresponding to the programmed measurement mode On the other hand the higher the a of the programmed parameter value the more measured or calculated process values can be transmitted through HART e g if P01 0 only the Distance if P01 4 Distance Level and Volume Exception 01 2 or 4 MEASUREMENT MODE PROCESS VARIABLES Distance Distance Volu me Volume Volume in percent a 0 1 Leg Level 2 Level in percent 3 4 TRANSMITTED PRIMARY VARIABLES TRANSMITTED THROUGH HART DIST LEV LEV VOL VOL OTHER VARIABLES TRANSMITTED THROUGH HART Secondary LEV Tertiary DIST Quaternary Temp LEV Factory settings 100 VOL Factory settings VOL 0 100 BKI 06 ATEX 021X scd3404a0600p_02 doc 6 17136 P02 cba Calculation units a Temperature 1 L e The value of character c has no significance at devices for solids FACTORY DEFAULT 000 P03 a Values displayed Rounding Not used at EasyTREK P04 Maximum measuring distance H and Xm Maximum measuring distance is the greatest distance H between the sensor surface and the farthest surface to be measured in the application Factory default of this parameter is the maximum distance Xm that can be measured by the unit See table below During programming P04 should be set for the
23. logue output will hold last value The current output holds last value for twice as long as set in P20 before going to the Error Indication Mode set in P12 Holding value Error Code 2 Delayed Echo loss dalan S y Echo LED goes out B EE i Holding last val P12 0 Current output Holding value 2577777 Current 3 6 mA 12 1 None During an echo loss the displayed value on the EView and the analogue output value will hold last value When echo Ke occurs during filling the displayed value on the EView and the analogue output value shifts towards the full tank silo state with the level elevation rate filling speed set in P26 In case of an echo loss no Echo will appear in EView and the outputs will change according to the Error immediate IZ Mode set in P12 No echo loss Echo loss may occur in completely empty tanks vvith a spherical bottom due to deflection of the ultrasonic beam or indication in case of in case of silos with an open outlet If the echo is lost when the tank silo is completely empty the indication will empty tank silo correspond to empty tank in all other cases echo loss indication will function according to the Delayed eneen Advance ofl full Immediate FACTORY DEFAULT 0 BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 25 36 P29 P31 P32 P33 m Blocking out of object One object in the tank silo disturbing measurement can be blocked out Enter distance of t
24. maximum distance to be measured whereas H lt Xm EasyTREK Maximum measuring distance Keep in mind that LEVEL as the result of the measurement P04 programmed Xm m DISTANCE measured by the device SE D 340 0 15 Since the accuracy of level and all further calculated value depends on the accuracy of the max measuring distance of the application which is the SOD 30 0 30 distance between the sensor face and the tank silo bottom SOD 310 O 60 To obtain the best accuracy for liquid level measurement measure with EasyTREK this distance in the empty tank FACTORY DEFAULT distance of Xm as per table above BKI 06 ATEX 021X e scd3404a0600p_02 doc 18 1 36 P05 Minimum measuring distance Close end blocking Basic feature of the ultrasound level meters is their not being able to measure next to the sensor surface Within this range the measurement can not be interpreted thus it should be avoided that material level get into this range By entering a value higher than the factory default the minimum measuring range will be extended and fixed to that value Manual close end blocking would be used for example to block out the echo originating from the bottom rim of a stand off pipe or from any object protruding into the ultrasonic cone near to the transmitter Automatic Close end blocking Automatic Dead Band control By using the factory default value the unit will automatically be adjusted to the smallest
25. nal The position of this measuring window determines the flight time for calculation of the distance of the target the picture below can be seen on the test oscilloscope Received signal amplitude t t ultrasound flight time Some applications involve multiple target disturbing echoes even within the measuring window Basic echo selection will be done by the Quest software automatically This parameter only influences the echo selection within the measuring window a Echo in the window to be selected Remarks 0 With the highest amplitude For most applications both liquids and solids F Estoe For applications with multiple echoes within the Measuring Window 2177 Largestone sd Recommended for applications with floating material in the air FACTORY DEFAULT 0 Level elevation rate filling speed m h FACTORY DEFAULT 500 BKI 06 ATEX 021X e scd3404a0600p_02 doc 24 36 P27 Level wane rate emptying speed m h Use these parameters to provide additional protection against echo loss in applications involving dust during the filling process powders dusting granules Reliability of the measurement can be enhanced by the correct setting of this parameter These parameters must not be smaller than the fastest possible filling emptying rate of the actual technology FACTORY DEFAULT 500 P28 a Echo loss handling Echo loss error indication During short periods of echo loss both Eview and the ana
26. ness Opening of the Roof D V Illustration of mounting BKI 06 ATEX 021X e scd3404a0600p_02 doc 11 36 4 VVIRING 4 1 WIRING CONDITIONS The transmitter is SELV supplied In the case of DC supply the connection is independent of polarity e Only SELV circuits can be switched on to the relay output e The house must be grounded to have noise protection it should be grounded to the equipotential bonding net 3 DC powered devices can be created by connecting one of the power supply wires to the white wire of the current output GND In this case the current output becomes galvanically non isolated units and the cables should be arranged so that the fastening outside the device relieves the end of the cable of any traction 4 2 CONNECTION CABLE EXTENSION e t is advised to use a terminal box when cable extension is necessary The shielding should be connected to the shielding of the extension cable and it should be grounded at the processing unit BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 12136 Brown Green Grey White Pink Yellow lout HART Relay output Output for test functions only gt ae Grounding Colour codes of the outputs Multiple SCD 300 transmitters connected to a MultiCONT process control unit Trial and laboratory programming of the SCD 300 transmitters Output current test Power is sup
27. o determine the distance of the correct echo either use the Echo Map to load in a value from the Echo Map see parameter P70 or measure the distance with an appropriate device and enter this N value in P33 f this parameter has been used P33 is not 0 its value will be continuously updated with the valid echo position This means that in case of a power loss the Easy TREK will restart the signal processing with the measuring window at the last updated position To switch off this function set P33 0 FACTORY DEFAULT 0 BKI 06 ATEX 021X e scd3404a0600p_02 doc 26 36 MANUAL ECHO SELECTION VVeak echo Disturbing echo from the surface Eg 5 2m Eg 3 85 m Received signal amplitude flight time measuring window Transmitted DIST value locked on the disturbing echo of the disturbing echo Window Window signal comp Measuring Window finds the echo from the surface Transmitted DIST value the value is correct Window BKI 06 ATEX 021X scd3404a0600p 02 doc 271 36 5 4 5 VOLUME MEASUREMENT P40 ba Tank silo shape EJ Tankisllq shape Other Hunan to be Standing cylindrical tank shape value of b as below bottom P40 b P41 Standing cylindrical tank silo with conical bottom P41 P43 P44 02 Standing rectangular tank silo with chute P41 P42 P43 P44 P45 3 Lying cylindrical tank shape value of b as bellow bottom P40 b P41 P42 FACTORY DEFAUL
28. plied from a common external source the relays are not used HART USB MODEM EasyTREK SCD 300 DEVICES SAT 304 0 MultiCONT HART communication and power supply of one SCD 300 transmitter from the MultiCONT process control unit 24V ACIDC MultiCONT EasyTREK SCD 300 SCD 3__ 4 5 0 3 4 5 0 3 4 SCD 3__ 4 ie h BKI 06 ATEX 021X scd3404a0600p_02 doc 6 13 36 5 PUTTING INTO OPERATION ADJUSTING PROGRAMMING 5 1 PUTTING INTO OPERATION After switching on the correctly wired unit the transducer begins to click audibly In about 20 50 s the ECHO LED goes on and a signal between 4 20 mA appears on the current output When first powering the unit it measures with the standard manufacturer s settings see some of the most important parameters below Default parameters All the transducers get the same factory default parameters that can also be reset later if needed Some of the most important parameters of the EasyTREK SCD 300 series can be found below Measurement mode level LEV 4 mA is assigned to the Xu maximum measuring distance minimum level 20 mA is assigned to the Xm minimum measuring distance maximum level Current output holds last value in case of error Damping 300 s All the other measurement values are set to fit the values suitable for standard tasks The functions used in special cases are switched off AI
29. possible dead band Xm In ideal cases this can be smaller and in disadvantageous mountings greater than the dead band Manual close end blocking P05 Xs gt Xm Entering greater value in P05 than Xm will represent the extension of the close end blocking Minimum measuring EasyTREK distance Xm m EES Sup su u T vs EELER FACTORY DEFAULT automatic close end blocking Xn as per the table BKI 06 ATEX 021X scd3404a0600p_02 doc 6 191 36 P06 Far end blocking Far end blocking is the range below the level set in parameter P06 Far end blocking can be used to avoid disturbing effects of stirrers or heaters at the bottom of the tanks LEV When the unit detects echoes in this range it gives special signals When level sinks below ar end blocking Message of Sub 0 appears in EView in level and volume measurement mode Current output holds value corresponding to far end blocking distance SUB 0 display LEV level below this level VOL volume P06 Far end blocking D 4mA 20mA lout When level rises above far end blocking The calculation of level and volume will be based on the programmed tank dimensions therefore the measured or calculated process values will not be influenced in any way by the value of far end blocking FACTORY DEFAULT 0 BKI 06 ATEX 021X e scd3404a0600p_02 doc 6 20 36 5 4 2 CURRENT VALUE P08 P10 P11 P12
30. rr6 The measurement is at the reliability threshold Change aiming or try to find a better location No signal received vvithin the measuring range i Err7 specified in P04 and P05 Revlevv programming also look for installation mistake Linearisation table error L 1 and L 2 are both zero Err12 no valid data pairs See the Section Linearisation Err13 Linearisation table error there are two same L i data in See the Section Linearisation the table Err14 Linearisation table error the r i values are not See the Section Linearisation monotone increasing Err15 Linearisation table error measured Level is higher than See the Section Linearisation the last Volume or Flow data pair Err16 The checksum of the program in the EEPROM is wrong Contact local agent BKI 06 ATEX 021X e scd3404a0600p_02 doc 32136 6 MAINTENANCE REPAIR The device does not require routine maintenance In case dust adheres to the face of the sensor despite the self cleaning of the sensor face through resonance ex static build up it can be cleaned by pressurised air Equipment sent back for repair should be cleaned or sterilised by the User The User must declare that the above has been carried out Repairs during or beyond the guarantee period are carried out solely by the manufacturer 7 STORAGE CONDITIONS Ambient temperature 30 60 C Relative humidity max 98 BKI 06 ATEX 021X e scd34
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