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Instruction Manual PENETRATING PULSE TECHNOLOGY

1. 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Earthing terminal in case battom Shield connected to case via cable socket 6 wire shielded control cable Supply voltage Connection Connection 1 4V AC DC sensor 2 sensor 1 4 3 1 Connecting the ultrasonic sensors The ultrasonic sensors of the AE series consist of an ultrasonic transducer and the electronic circuitry Power is supplied and the electronic circuits controlled by the SONOMETER 30 Connect the sensors to the SONOMETER 30 with a 6 wire shielded control cable We recommend shielded control wire type LiYCY 6x0 5 The cable can be 300 m long The resistance of each wire must not exceed 10 ohms for the chosen length of cable This means that conductors of smaller cross section area can be used if the cable length is short Assuming round wire cross section and outside cable diameter of 5 10 mm the IP65 degree of protection of the sensor is ensured Page 15 Figure 6 Attaching the cable to the sensor IS Ground sensor if vessel is not of metal Attaching the cable to the sensor The shield is connected to the housing and earthed when the cable is installed in the cable bush To attached the cable proceed as follows Open the sensor housing Strip approx 60 mm of the cable Unscrew the cap on the cable bush Pull out the cable bush insert Pull the cable
2. 6 32 Parameter P 52 P 54 Level limit of switched output 1 2 6 33 Parameter P 53 P 55 Hysteresis of switched output 1 2 6 34 Parameter P 56 Configuration of alarm switched output 6 35 Parameter P 60 Enable temperature compensation 6 36 Parameter 61 Speed of sound 6 37 Parameter P 62 Temperature at apex 6 38 Parameter P 63 Linear drift of speed of sound 6 39 Parameter P 90 Device 5 6 40 Parameter P 92 Software version 6 41 Function P 98 Copying parameter 5 6 42 Function P 99 Saving parameters 2 Advanced Programming mode eere 7 1 Parameter P 11 Adjusting the control current for sensor 7 2 Parameter 32 Simulation of liquid 7 8 Parameter P 45 Simulation of current 7 4 Parameter P 46 Adjustment of current 7 5 Parameter P 70 Enable interval for sensor contact verification 7 6 Parameter P 71 Transmission energy for sens
3. 4 5 6 4 5 6 4 5 6 GND A B GND A B GND A B SONOMETER 30 SONOMETER 30 SONOMETER 30 Address 01 Address 02 Address 32 Figure 24 RS 485 wiring principle Page 53 5232 lt gt 5485 converter Port configuration Communication via the serial port follows the master slave principle The master usually your PC a terminal device or a similar device always works as the trans mitter and controls the data exchange It functions as a receiver only to receive data The SONOMETER 30 is the slave performing the instructions it receives from the master For this purpose the serial port of the SONOMETER 30 always works as a receiver It transmits data only if instructed and returns to receive mode after it If a PC is to function as the master an RS 485 interface must usually be installed The required RS 485 plug in module mostly with electrical isolation are available commercially As an alternative an adapter can be used that fits the RS 485 standard to the stand ard RS 232 port of your PC The RS 232 port of a PC usually has separate lines for reception and transmission Both lines are brought together in the adapter For this multiplexing mode to operate smoothly information on the direction of the data flow i e transmission or reception is required Most suppliers of RS232 RS485 adapt ers use the RS 232 control lines RTS or DTR For details please see the user instructions of you
4. PENETRATING PULSE TECHNOLOGIES INC _ 152554 0 44 SONOMETER 30 i 8 9 d s 9 y G i 1 de we ur ie Je GND CH1 CH2 GND A B 5 RS 485 REL 2 REL 1 ALARM soNoMETER 30 Or 24V PRRAKEBE 1 RE 20 21 22 23 24 25 28 27 28 20 30 21 32 33 34 35 35 37 38 Instruction Manual Issued 6 99 HiTECH Technologies 301 Oxford Valley Road Building 505A Yardley PA 19067 7706 1 800 755 4507 FAX 1 215 321 6067 EMAIL info hitechtech com PENETRATING PULSE TECHNOLOGIES INC TECHNOLOGY SONOMETER 30 Penetrating Pulse Technology Liquid Level Measurement Table of contents Page 1 Safety alerts and other symbols used esee 4 2 Safety instructions encounter ener 5 3 555 554 455 55221 1 23354522 0 22 4142141486 26252331 7 9 1 OVGIVIOW A 7 3 2 System 8 3 3 Principle of Operation 9 00 112 E 11 Ec oT 11 4 2 SONOMETER 30 eee tei age edad aede renda 15
5. Parameter P 26 Mounting height of sensor Instruction word MOUNTLEVEL Instruction class Set and inquire Value range 9990 9999 mm Parameter P 27 Number of reference points with vessel of user defined shape Instruction word RPCOUNT Instruction class Set and inquire Value range 2 30 Parameter P 28 Select reference point Instruction word RPSELECT Instruction class Set and inquire Value range 1 30 Parameter P 29 Level at current reference point Instruction word RPLEVEL Instruction class Set and inquire Value range 0 20000 mm Parameter P 30 Volume at current reference point Instruction word RPVOLUME Instruction class Set and inquire Value range 0 12000 a hundred times percentage value Parameter P 31 Reference volume Instruction word REFVOLUME Instruction class Set and inquire Value range 0 001 9999 cubic metres Note This is the only parameter which supports floating decimal point function The value range comprises 1 litre to 9999 cubic metres The number of digits is limited to four Every change to the next higher power of 10 causes a shift of the floating point to the right deleting one decimal digit Hence four ranges are available 1 0 001 9 999 II 10 00 99 99 111 100 0 999 9 and IV 1000 9999 Parameter P 32 Simulation of level Instruction word SETLEVEL Setting level Advanced Programming mode only Instruction class Set and inquire Value range 0
6. One step changes the gain power approximately by 1 dB The unit dB is a logarith mic relative unit of measurement For example 20 dB are equal to factor 10 6 dB to factor 2 Page 28 6 4 Parameter 05 Dead time Settings 0 001 20 00 Dead time in ms Part of the transmitted ultrasonic pulse is reflected several times by the walls of the vessel The purpose of the dead time is to eliminate undesired reflections received in the time window Level echoes received in the time window are also ignored Equation 1 allows a sufficiently accurate estimation of the minimum level that can be measured Equation Fran mm M S ms Dead time Fmin Minimum measurable level Speed of sound in the measured liquid 1 Estimation of the bottom limit for measurement To have visual control of setting the dead time the use of an oscilloscope on the test output of the SONOMETER 30 is urgently recommended see chapter 4 3 2 The setting of the dead time should be made on the full vessel so that all reflec tions detected immediately after sending the pulse are in the time window of the dead time 6 5 Parameter P 06 Measuring window Settings 0 001 30 00 Measuring window in ms The measuring window should be set according to the maximum level The measuring window should not be longer than required The end of the measuring window can be defined by means of equation 2 ms
7. This symbol indicates a note or detailed setting tips This symbol indicates enumeration Operator keys are printed in bold type and placed in pointed brackets Display text uses a special font on a yellow background Symbol decals on the measuring system This symbol indicates a general hazard Caution Follow the documentation See chapters 4 3 and 4 3 2 This symbol indicates the operational ground See chapter 4 3 1 Page 4 2 Safety instructions The SONOMETER 30 and the Penetrating Pulse Technology ultrasonic sensors comply with all applicable safety regulations The equipment has been factory tested and every precaution has been taken to ensure the safe operation of the equipment The user must take care that the equipment is set up and installed so that its safe use is not affected This Instruction Manual contains information and warnings which must be complied with by the user to ensure the safe operation of the equipment The following safety instructions must be followed before starting the equipment and while using it e The equipment must only be started by authorised personnel and operated by instructed persons All persons using the equipment must have read this User s Manual e Only the repair and maintenance operations described in the User s manual must be carried out and only specified parts must be used e Service work must only be performed by authorized service personnel e The equip
8. C In such a case simply enter a second pair of values for speed of sound and temperature at P 61 and P 62 even if that is not the maximum speed of sound The SONO METER 30 automatically detects it and selects the appropriate instruction for calculation 6 37 Parameter P 62 Temperature at apex The following parameter applies only to water like liquids parameter P60 1 50 150 Temperature at apex of characteristic in C 6 38 Parameter P 63 Linear drift of speed of sound Other liquids This parameter applies to all liquids that are unlike water parameter P60 2 9 990 9 999 Drift of the speed of sound in m s per K Page 46 6 39 Parameter P 90 Device address 0001 0032 Device address for serial port Up to 32 devices can be connected in parallel to the RS 485 bus It is a condition however that every device has a different device address 6 40 Parameter P 92 Software version Read only xx yy Software version Main version yy Sub version The software in SONOMETER 30 is continually updated to adjust it to prac tical requirements Besides user defined adjustments to the software are also possible This parameter shows you the current version of the soft ware you are using The main version is separated from the subordinate version by decimal point If you require service please specify the software version number in your request 6 41 Function P 98 Copying parameter sets 0 Function d
9. The SONOMETER 30 cannot calculate the measured value because the ves sel data entered do not consider the level reading This may have several causes e g the calculated percentage value exceeds 500 limit lying cylinder the level is higher than the cylinder diameter user defined shape of vessel the liquid level exceeds the level defined by the highest reference point Page 67 10 Default settings The devices are delivered with the following default settings INTENTIONALLY BLANK PAGE Page 68 INTENTIONALLY BLANK PAGE Page 69 INTENTIONALLY BLANK PAGE Page 70 INTENTIONALLY BLANK PAGE Page 71 INTENTIONALLY BLANK PAGE Page 72 INTENTIONALLY BLANK PAGE Page 73
10. The number xx indicates the current parameter number You can set a parameter number by pressing buttons lt gt or lt gt The re quired parameter value is confirmed by a press of button lt P gt and will be shown on the display panel If you select a parameter that has not been implemented or is available on the current programming level the system goes to the next possible parameter 3 Setting a parameter The parameter value on display can be changed within permitted limits by pressing button lt gt or lt gt Confirm the new setting by pressing P and the system returns to the Parameter Selection menu P xx is shown on the display panel the parameter number indicates the next higher parameter Page 22 Exit programming mode by selecting 99 Save parameters 20 No save E Save End End of program ming mode Rapid toggle between measuring mode lt gt programming mode Warning Parameter not saved F 09 Set transmission energy gain ch Set gate 4 Cancelling the programming mode You can select view or change the parameters in any sequence The program ming mode is cancelled by calling the last parameter M vino param eters see chapter 6 42 After making and confirming the entry the program ming mode is cancelled The word End is shown on the display panel and the system returns to the measuring mode Please note the following e Normally any entry in progr
11. for example when the feeding voltage fails SONOMETER 30 Spec 1xx 1 channel OFF ALARM relay permanently disabled red LED lighting On ALARM relay permanently enabled red LED not lighting A C1 ALARM relay drops fault message if no reading is possible in channel 1 SONOMETER 30 Spec 2xx 2 channel OFF ALARM relay permanently disabled red LED lighting On ALARM relay permanently enabled red LED not lighting A C1 ALARM relay drops fault message if no reading is possible in channel 1 A C2 ALARM relay drops fault message if no reading is possible in channel 2 C1u2 ALARM relay drops fault message if no reading is possible in channel 1 or channel 2 No fault message Relay picked up e Red LED in the front plate not lighting Fault message Relay dropped Red LED lighting operating voltage is available Page 44 Figure 23 Temperature dependence of the speed of sound in water 6 35 Parameter P 60 Enable temperature compensation The speed of sound depends on the temperature to some degree If the tempera ture fluctuates wrong readings are likely Sensors with integrated temperature detector compensate the reading error They ensure that the speed of sound is calculated for the actual temperature of the liquid This is done with reference to a temperature coefficient The temperature as measured and the speed of sound derived from the tempera ture reading can be shown on the display panel in me
12. 12000 and 12001 a hundred times percentage value 12001 means Simulation OFF Parameter P 40 Beginning of current output Instruction word ANLSTART Instruction class Set and inquire Value range 0 10000 a hundred times percentage value Parameter P 41 End of current output Instruction word ANLEND Instruction class Set and inquire Value range 0 10000 a hundred times percentage value Page 58 Parameter P 42 Current output range Instruction word OFFSCURR Instruction class Set and inquire Value range 0 1 with the following meaning 0 0 20 1 4 20mA Parameter P 43 Current for wrong reading Instruction word ERRCURR Instruction class Set and inquire Value range 0 220 and 221 ten times the milliampere value 221 means OFF if a fault occurs the last current value is held current value is guaranteed up to 20 mA only Parameter P 44 Current in case of device fault Instruction word FAILCURR Instruction class Set and inquire Value range 0 220 and 221 ten times the milliampere value 221 means OFF if a fault occurs the last current value is held current value is guaranteed up to 20 mA only Parameter P 45 Simulation of current output Instruction word TESTCURR Setting level Advanced Programming mode only Instruction class Set and inquire Value range 0 220 and 221 ten times the milliampere value 221 means simulation OFF if a fault occurs the last current value is held cur
13. 4 3 a c 15 4 3 1 Connecting the Sensor sse 15 4 3 2 Connecting the SONOMETER 30 sse 16 5 G 21 5 1 Installation and wiring check 0 21 5 2 SONOMETER 30 operating 21 5 3 Button Functions sedere hei Dee cabe re oe de 21 5 4 SONOMETER 30 parameter 22 5 5 Measured value acquisition 2 23 5 6 Measured value 25 6 SONOMETER 30 parameters eese ennt nnne nnns 27 6 1 Parameter P 02 Channel selection sse 28 6 2 Parameter 03 Transmission 28 6 3 Parameter P 04 28 6 4 Parameter 05 Dead time 29 6 5 Parameter P 06 Measuring window 2 29 6 6 Parameter 07 Speed of 30 6 7 Parameter P 08 Expected 31 6 8 Parameter 09 Noise suppression 2 31 6 9 Parameter P 10 32 6 10 information on time controlled gain 32 6 11 Parameter P 12 Enable reference point number for TOG 34 6 12 Parameter P 13 Select TCG reference 34 6 13 Parameter P 14 Time for cu
14. Expected range Step Expected range Step Expected range 0 0 8 96 3 6 2 96 6 50 96 1 1 6 4 12 5 7 100 2 3 1 5 25 96 Parameter P 09 Noise suppression Instruction word ERRDELAY Instruction class Set and inquire Value range 0 13 In steps with the following meaning Step Noise suppression Step Noise suppression Step Noise suppression 0 0 15 5 5s 10 200 s 1 0 25 6 10s 11 500 s 2 0 5s 7 20s 12 1000 s 3 1s 8 505 13 2000 s 4 25 9 100 5 Parameter 10 Wall time Instruction word WALLTIME Instruction class Set and inquire Value range 0 200 us Parameter P 11 Compensation of control current for sensor Instruction word CALGAIN Parameter setting level Advanced Programming mode only Instruction class Set and inquire Value range 100 255 Parameter P 12 Enable number of reference points for time controlled gain TCG Instruction word TCGCOUNT Instruction class Set and inquire Value range 0 disabled 1 10 Page 56 Parameter P 13 Select TCG reference point Instruction word TCGSELECT Instruction class Set and inquire Value range 1 10 Parameter P 14 Time for current TCG reference point Instruction word TCGTIME Instruction class Set and inquire Value range 1 30000 us Parameter P 15 Transmission energy for current TCG reference point Instruction word TCGENERGY Instruction class Set and inquire Value range 1 9 In steps Parameter P 16 Gain for current TCG reference point Inst
15. Switches if fault in channel 1 or 2 Switches only if fault in channel 1 channel 2 Parameter P 60 Enable temperature compensation Instruction word TEMPMEAS Instruction class Set and inquire Value range 0 2 with the following meaning No Compensation No Compensation 0 disabled 2 for all other media 1 for water and water like media Parameter P 61 Speed of sound at apex Instruction word MAXVEL Instruction class Set and inquire Value range 250 8000 m s Parameter P 62 Temperature at apex Instruction word TEMPMAXVEL Instruction class Set and inquire Value range 2230 4230 ten times the Kelvin value Here are a few examples 50 C 223 K corresponds to 2230 0 C 273 K corresponds to 2730 20 C 293 K corresponds to 2930 100 C 373 K corresponds to 3730 150 C 423 K corresponds to 4230 Parameter P 63 Linear drift of speed of sound Instruction word VELDRIFT Instruction class Set and inquire Value range 9999 9999 mm s pro Kelvin Parameter P 70 Release interval for sensor contact verification Instruction word SELFTEST Setting level Advanced Programming mode only Instruction class Set and inquire Value range 0 6 In steps with the following meaning Step Time interval Step Time interval 0 disabled 4 100s 1 5s 5 500 s 2 10s 6 1000 5 3 50s Parameter P 71 Transmission energy for sensor contact verification Instruction word TESTENERGY Setting level Advanced Progr
16. detectable a large filled volume usually requires more transmission energy or gain than a small filled volume With the TCG function the transmission energy and the echo time of the ultrasonic pulse can be adjusted to optimum level This permits to reduce the dead time i e the lowest level for measurement with out impairing the measuring accuracy of large filled volumes N Division in time intervals For this the measuring range can be divided in up to 10 time intervals of any width Each interval is marked by a reference point A reference point is a point on the time scale to which specific values of transmission energy and gain are assigned The reference point for time point 0 is set by parameters P 03 and P 04 The gain is adjusted in linear fashion in the time interval between the reference points The transmission energy is constant in each time interval The values defined for the last reference point are adopted and not changed for the rest of the measuring range In most cases it is sufficient to work only with gain adjustment and keep the trans mission energy constant at one step across the entire measuring range This accel erates the measuring process Page 32 The dead time is made up as a function of the current echo time reading It follows the echo at a time difference equal to double the expected range parameter P 08 The dead time is never smaller than the dead time set in parameter P 05 Onl
17. information regarding parameter P 43 in chapter 6 30 Page 42 6 31 Parameter P 50 P 51 Configuration of switched output 1 2 SONOMETER 30 spec 1xx 1 channel Spec 1xx OFF Switched output permanently disabled On Switched output permanently enabled A C1 Switched output is set to channel 1 as required by the level measured SONOMETER 30 spec 2xx 2 channel Spec 2xx OFF Switched output permanently disabled On Switched output permanently enabled A C1 Switched output is set to channel 1 as required by the level measured A C2 Switched output is set to channel 2 as required by the level measured 6 32 Parameter P 52 P 54 Level limit of switched output 1 2 000 0 120 0 Level limit of switching contact in 96 6 33 Parameter P 53 P 55 Hysteresis of switched output 1 2 000 0 050 0 Hysteresis in 96 The switching contact is switched on if a level higher than or equal to the set limit is detected in the assigned channel parameters P 52 P 54 The switching contact is switched off if a level smaller than the limit less the hysteresis is detected in the assigned channel Switch on Level limit 95 Switch off Level 96 lt limit 76 hysteresis 96 Page 43 6 34 Parameter P 56 Configuration of alarm switched output The ALARM switched output provides outputs of fault messages and works on the closed circuit current principle The switching contact also generates a fault message
18. negative flank level 400 mV Y co ordinate 200 mV DIV Time base 100 us DIV 5 ms DIV depending on measuring range On principle the following picture will be obtained if the working method is correct Ultrasonic pulse dying down Pulse sent Dying down in vessel wall _Echo Maybe multiple reflection 200mV Time 4 Trigger pulse Dead time Measuring window Page 20 Button functions in measuring code Button functions in programming mode 5 Start up 5 1 Installation and wiring check Before feeding operating voltage make sure of the correct in stallation of the sensor firm seating of all fastening elements the cable attachment and the housing cover Inspect the wiring on the sensor the SONOMETER 30 and other units if any Ensure in particular that all plug type terminals on the SONOMETER 30 are installed at the correct places Make sure that the sensor is earthed If the vessel is made of non conducting material a separate ground cable must be in stalled The cable shield of the probe cable must be connected to the equipotential bonding of the control room If a power supply unit is used the installation instructions should be observed 5 2 SONOMETER 30 operating modes When operating voltage is supplied the SONOMETER 30 is running in regular measuring mode In programming mode the parameter settings can be displayed and edited There are two ways to go from
19. of the last specified reference point must be larger than or equal to 10096 max 120 Finally the vessel volume that corresponds to 100 filling must be specified This value is specified in units of cubic metres To enter a pair of reference point values with parameters P 29 and P 30 the required reference point must first be selected with parameter P 28 Enter the liquid level and percentage volume of the current reference point and then call parameter P 28 again to select the next reference point for which you want to specify values A plausibility check of the entries is made when cancel the programming mode Page 39 6 22 Parameter P 27 Number of reference points 0002 0030 Number of reference points user defined vessel shape This parameter indicates the number of reference points describing the volume procedure of the vessel Only the number of reference points specified here is accepted as the valid number and is used for calculation 6 23 Parameter P 28 Select reference point 0001 0030 Selects the current reference point for the user defined vessel shape Here the number of the reference point is specified to which the entries in pa rameters P 29 and P 30 relate To view or edit other reference points always call P 28 at first and enter the number of the reference point you want to view or edit 6 24 Parameter P 29 Level at current reference point 0 000 20 00 Level in m Here you enter the lev
20. on the display panel Pressing button P again causes the code be shown on the dis play panel This is a prompt for you to input a code number The programming mode is divided in two different levels The selection is made by the input of a code number at the beginning of the programming mode Press buttons lt gt and lt gt until you can enter one of the following code numbers e Normal programming mode Enter code number On this level you can program all parameters which are important for the start up of the SONOMETER unit e Advanced programming mode Enter code number 1799 This level has several functions that are not available to the user in normal programming mode see chapter 7 Advanced Programming mode These functions should only be used by instructed persons If you enter a wrong code number the prompt FEHL is shown on the display panel and the system exits the programming mode If the correct code number is entered press lt P gt to confirm the entry The system then goes to the Parameter Selection menu Entry of the code number is not necessary if the user exited the previous programming procedure without saving parameters In this case pressing button lt P gt directly starts the programming mode If you want to re enable the code number to protect from unauthorised access save the data before exiting the parameter setting function 2 Parameter Selection menu On the display panel P xx is shown
21. permanently saved with parameter P 99 Page 26 6 SONOMETER 30 parameters Param Spec Spec Designation Settings No 1 2 x programm mode access code 0345 P 02 x__ Channel selection CH1 CH2 P 03 X x Transmission energy Step 1 9 P 04 Step 1 67 P 05 x Dead time 0 001 20 00 ms P 06 X x Measuring window 0 001 30 00 ms P 07 Speed of sound 250 8000 m s P 08 x Expected range 0 8 100 P 09 x__ Noise suppression 0 100 2000 s P 10 time 0 200 us P 12 X x TCG enable number of ref points OFF 1 10 P 13 X TCG select reference point 1 10 P 14 X x TCG time for current ref point 0 001 30 00 ms P 15 X x TCG trans energy for curr ref point Step 1 9 16 x TCG gain for curr ref point Step 1 67 P 20 x__ Unit of measurement for display output 0 m 1 2 V 3 hl 4 m3 5 ms 6 C 7 m s P 21 x Output intervall 0 100 2000 s P 22 X x Shape of vessel standard shapes O st cyl 1 ly cyl 2 rect 3 user def 4 ref P 23 X x Dimension 1 0 000 20 00 P 24 X x Dimension 2 0 000 20 00 P 25 X x 10096 level 0 001 40 00 m P 26 X x Mounting height of sensor 9 990 9 999 m P 27 x
22. this fault occurs please call our service team The hash total by the non volatile parameter memory is wrong You can make atotal reset by pressing the selection key and a new start of the device Please contact our service team for repair of defective assemblies The device software is not compatible with the device hardware Please in form our service team The device software contains a wrong software version Please inform our Service team The main memory in the device is defective As the saved parameter settings are no longer secure the measuring process is discontinued and device stopped Please contact our service team The internal working memory of the microcomputer is defective The device was stopped Please inform our service team A difference between the working parameter set and the contents of the non volatile parameter memory has been found Please verify your parameter settings and save them again If the same fault occurs again the computer hardware is defective Please consult our service team The sensor enable circuitry is defective Please call our service team to repair the defect The acoustic attachment of the sensor to the vessel is interrupted or impaired Inspect the sensor contact or the settings of parameters P 71 to P 74 Detection of fault F 10 must be permitted by parameter P 70 The sensor detects a signal although no signal should actually be present at this time The cause is a defect in
23. vessels without expensive testing if the vessel is a pressure vessel liquid level ta control sound field Ed vessel sensor This versatile liquid level measuring system has a large number of functions and can be used to advantage in complex measuring and control systems A comprehensive measuring algorithm ensures high measuring accuracy and data reliability The liquid level is directly shown on the display panel The level indication can be scaled to any engi neering units of level or volume The measured value is available in an analog 4 to 20 ma current signal The measured range can be adjusted as required A large number of monitoring tasks for which the limits can be set freely can be performed simultane ously The parameters required for installation can comfortably be input via buttons The parameter inputs are not lost if the power supply is interrupted Various operating states can be simulated with the SONOMETER 30 which is a substantial facilitation of the start up or integration in your control system A serial interface supports data exchange with computers All parameters can be set and measured values obtained at this port The port has bus capacity and supports the parallel connection of up to 32 series SONOMETER 30 SONOCONTROL 20 units The SONOMETER 30 is available as a single channel or two channel version The
24. volume further vessel dimensions are required The result can be output in units of litres hectolitres or cubic metres The switching signals are generated by a comparison of the liquid level with the limit values in percent The output of the current signal is also calculated on the basis of the percentage liquid level To adjust your control system you can set the time intervals in which the results are output This regards the updating of the measured values on the display panel the current outputs and the switching signals cf Chapter 6 17 Page 10 Sensor attachment Inspect state of attachment face Install mounting compound between sensor and vessel 4 Installation 4 1 Sensor The sensor can be attached optionally with a screw type module or thread As counterpart of the sensor holders the following fixing devices are available e Ring for welding or gluing on the vessel e Mounting plate for attachment by strap retainers e Adapters for special screwed fasteners Varivent milk pipe screw connec tion clamp closures etc Figures 3 and 4 on the following pages illustrate the various types of sensors and the method of their fixing If you are not sure which sensor type is best for your solution please consult our service personnel which will be glad to help The ultrasonic sensor must be aligned vertically max 2 3 off the vertical line are tolerated State of attachment face The quality
25. 28 2400 1 6 F mw vi m s m for water max Measuring window Maximum possible level Speed of sound in the measured liquid Equation 2 Calculation of the measuring window Page 29 Table 5 Speed of sound in selected liquids 20 C Equation 3 Adjusting the speed of sound 6 6 Parameter 07 Speed of sound Settings 0250 8000 Speed of sound in m s at 20 C The speed of sound depends on the measured liquid The table below con tains speed of sound data for selected liquids at 20 C Liquid Speed of sound Water 1 483 nvs Ethyl alcohol 1 180 nvs Acetone 1 200 m s Diesel oil light 1 250 ms Transformer oil 1 425 m s If the speed of sound is not known proceed as follows 1 Please set the following parameters to the specified values P 07 1483 speed of sound 1 483 m s P 11 Wall time seer chapter 6 9 P 20 0 display values in unit of P 26 0 installation height 0 m 2 Fill the vessel with liquid and measure the level by another method dis tance between liquid surface and sensor surface 3 Cancel the programming mode and take the level reading in m 4 If the level reading is low increase the speed of sound setting if it is high reduce the speed of sound setting You can use the following equa tion v m s Ees E 1485 Fpispi m Calculated speed of sound of the measured liquid Level measured by alternative method Level shown on the dis
26. SONOM 30 is a 2 channel unit spec 2xx Page 17 Figure 7 Galvanic isolation in the SONOMETER 30 A 24V AC DC Attaching the sensor cable to the SONOMETER 30 e Where the cable enters the control cabinet connect the cable shield to the equipotential bonding Avoid earthing connection by a long line as this renders the shield ineffective There is no need to connect a shield to the SONOMETER 30 e Strip the cable and install end ferrules e Connect the cable from the cable to the terminals of SONOMETER 30 as shown in table 2 This ensures that the terminals V V I l A and B on SONOMETER 30 are connected to the terminals of the same designation in the sensor Operating voltage circuit wiring The supply voltage poles cannot be mistaken Make the connections of the operating voltage as follows e Terminal 20 21 first pin 24 V AC DC max 500 mA e Terminal 22 23 second pin 24 V AC DC max 500 mA Terminals 20 and 21 as well as 22 and 23 are internally wired A second unit can easily be supplied with operating voltage Max range for supply voltage 19 30 V AC DC To ensure high resistance Interface Voltage to electromagnetic inter Iq ference EMI signals are senson transmitted differentially Besides all function blocks SONO Current output 2 METER 30 are supplied with electrically isolated ope
27. User def shape number of ref points 2 30 P 28 x User def shape select reference 30 P 29 X x User def shape level at curr ref pt 0 000 20 00 m P 30 x User def shape volume at curr ref 000 0 120 0 96 P 31 x User def shape reference volume 0 001 9999 m P 40 x Beginning of current output 000 0 100 0 P 41 x of current output 000 0 100 0 P 42 Current output range 0 20 4 20 mA P 43 X x Current for wrong reading 00 0 22 0 mA OFF P 44 X x jCurrent in case of device fault 00 0 22 0 mA OFF P 50 x jConfiguration of switched output 1 OFF On CH1 CH2 P 51 x of switched output 2 OFF On CH1 CH2 P 52 X x Level limit of switched output 1 000 0 120 0 53 Hysteresis of switched output 1 000 0 50 0 P 54 X jLevel limit of switched output 2 000 0 120 0 55 x Hysteresis of switched output 2 000 0 50 0 96 56 x Configuration of alarm switched output OFF On CH1 CH2 1 2 60 X x Enable temperature compensation 0 OFF 1 water 2 other P 61 x Speed of sound at apex 250 8000 m s P 62 X x Temperature at apex 50 150 C P 63 x drift of speed of sound 9 990 9 999 m sK P 90 x Device address 5485 1 32 P 92 x__ Software version read only P 98 x Copying parameter sets 0 no function 1 copying to o
28. ain You enable the function by specifying the number of reference points to be defined Only the number of refer ence points specified here is accepted as the valid number and is used for calcula tion Start with entering all reference point data and then enable the TCG 6 12 Parameter P 13 Select TCG reference point 0001 0010 Select the current TCG reference point Here the number of the TCG reference point is specified to which the settings of parameters P 14 to P 16 relate To view or edit further reference points call P 13 every time and enter the number of the reference point you want to view or edit 6 13 Parameter P 14 Time for current TCG reference point 0 001 30 00 Timing of current reference point ms This parameter defines the time position of the current reference point in the meas uring range of the SONOMETER 30 At first select the required reference point with parameter P 13 The specified timing must be longer from one reference point to the next The inter vals need not be the same Page 34 Parameter P 15 Transmission energy for current TCG reference point 0001 0009 Transmission energy step for current TCG reference point Parameter P 15 defines the transmission energy to be used between the cur rent reference point and the next following reference point If there is no next following reference point this transmission energy is used for the rest of the measuring window For setting ref
29. allation of the retainer can be compensated The direction in which the cable exits can be selected freely by turning the sensor If you use a sensor with screw thread no mechanical adjustment is possible Like sensor with screw type module install the sensor only hand tight Note that the front of the ultrasonic transducers are covered with a high precision plastic coat Operating temperature The specified maximum operating temperature of the sensors must not be ex ceeded not even for a short moment The sensor consists of the ultrasonic transducer and the electronic control circuits The ultrasonic transducer which has direct contact with the vessel is designed for a maximum temperature of 135 C The electronic circuitry in the sensor housing can tolerate temperatures from 20 C to 80 C Self heating due to operation remains low up to 10 K The permitted ambient temperature range of the sensors is essentially determined by the local conditions i e by the possibility to carry off heat Here are two examples 1 The sensor is attached to a heated vessel The vessel is completely covered with heat insulation As in these conditions heat cannot be transported the sensor heats to the temperature of the vessel In this case the maximum vessel temperature is 70 C viz the highest permitted temperature of the electronic circuitry less the degree of self heating 2 The sensor is used on a vessel without thermal insulation Conv
30. also go from one programming level to the other with the CODE instruction 8 3 Set of instructions for serial port Parameter P 01 Access code a To establish a link Instruction word CODE Instruction class Set Value range 0345 for normal parameter setting 1799 for Advanced Programming mode b To go to another parameter setting level Instruction word CODE Instruction class Set Value range 0345 for normal parameter setting 1799 for Advanced Programming mode C Quit serial communication Instruction word EXIT Instruction class non parameterised instruction Parameter P 02 Channel Instruction word CH Instruction class Set and inquire Value range 1 2 Parameter P 03 Transmission energy Instruction word ENERGY Instruction class Set and inquire Value range 1 9 in steps Page 55 Parameter P 04 Gain Instruction word GAIN Instruction class Set and inquire Value range 1 67 in steps Parameter P 05 Dead time Instruction word DEADTIME Instruction class Set and inquire Value range 1 20000 us Parameter P 06 Measuring window Instruction word MEASWIND Instruction class Set and inquire Value range 1 30000 us Parameter P 07 Speed of sound Instruction word VEL Instruction class Set and inquire Value range 250 8000 m s Parameter P 08 Expected range Instruction word AVRTOL Instruction class Set and inquire Value range 0 7 In steps with the following meaning Step
31. amming mode is carried out immediately The measuring procedure is continued without limitation in the background e f the programming mode was cancelled without saving the parameter entries the code protected access remains disabled In this case press ing button P returns you to the programming mode directly This is a convenient way to toggle between programming mode and measuring method e If the program fails to detect any activity for 16 minutes it returns to the measuring mode automatically To remind the user that the parameter en tries will not be saved when the program is exited and the code number protection has not been re enabled the code F 09 is shown on the display panel e As long as the programming mode remains enabled communication via the RS485 interface is not possible If in programming mode you want to go from one programming level to another programming level save the parameter entries at first see chapter 6 13 can cel the programming mode and then start it again by pressing button P 5 5 Measured value acquisition Before the SONOMETER 30 can be used for measurement it must be ad justed to the concrete conditions vessel and medium Two fundamental set tings are required for the acquisition of measured values 1 The amplitude of the ultrasonic pulse is attenuated as it propagates through the liquid in the vessel Hence the pulse must be electronically amplified when received The transmiss
32. amming mode only Instruction class Set and inquire Value range 1 9 In steps Page 60 Parameter P 72 Gain for sensor contact verification Instruction word TESTGAIN Setting level Advanced Programming mode only Instruction class Set and inquire Value range 1 67 In steps Parameter P 73 Gate beginning for sensor contact verification Instruction word TESTBEG Setting level Advanced Programming mode only Instruction class Set and inquire Value range 1 30000 us Parameter P 74 Gate width for sensor contact verification Instruction word TESTWID Setting level Advanced Programming mode only Instruction class Set and inquire Value range 1 30000 us Parameter P 90 Device address This parameter can only be set via the keyboard it is a precondition for communication via the serial interface Parameter P 91 Asynchronous cycle rate Instruction word ASYNCH Setting level Advanced Programming mode only Instruction class Set and inquire Value range 0 15 In steps with the following meaning Step Offset from Step Offset from Step Offset from base interval base interval base interval 0 0 us 6 600 us 12 1 2 ms 1 100 us 7 700 us 13 1 3 ms 2 200 us 8 800 us 14 1 4 ms 3 300 us 9 900 us 15 1 5 ms 4 400 us 10 1 0 ms 5 500 us 11 1 1 ms Parameter P 92 Software Version Instruction word VERSION Instruction class Inquire Feedback value xxyy as decimal number without decimal point with the fol
33. ape of vessel type 3 The level does not rise steadily from one reference point to the next even values are also not acceptable The same may be the case with the percentage volume The last valid reference point specified by parameter P 27 contains a volume less than 100 Page 66 FO9 21 F30 F33 F34 9 3 Warnings Warnings inform the user that the measuring process is not proceeding along the optimum line Warnings are caused by parameters that are not the best The measuring result will not be affected The warning code can be polled serially The parameters have not been saved permanently You quit the programming mode with P 99 0 or the SONOMETER 30 automatically returned to the meas uring mode after not detecting any button activity or receiving a serial instruc tion for 16 minutes The warning F 09 is indicated periodically by flashing for a brief moment You have selected the temperature for the display panel parameter P 20 but not enabled the temperature reading parameter P 60 Overflow or underflow of the number range The number cannot be represented by the 4 digit display Go to the next higher volume unit or select another unit parameter P 20 The unit set with parameter P 20 lacks plausibility Examples Output of a vol ume unit in channel 2 while it is serves as reference measurement or output of a sound transmission time while the simulation of the percentage level is ena bled
34. asuring mode see chapter 6 16 parameter P 20 As regards temperature coefficients there are two fundamentally different groups of liquids Water and water related liquids aqueous solutions The dependence of the speed of sound on the temperature has the shape of a parable Two parameters must be entered as co ordinates of the apex of the parabolic char acteristic The other pair of values is provided by parameter P 07 speed of sound which invariably relates to a temperature of 20 C Speed of sound in m s 560 1557 5407 5205 500 1 1483 480 460 25 10 20 30 40 50 60 80 90 100 Temperature in C Other liquids Other liquids e e hydrocarbons oils Linear dependence of speed of sound on temperature Tables with values for a multitude of different liquids are available Please ask our service team for the parameters you require Page 45 OFF Temperature compensation disabled speed of sound equal to setting of parameter P 07 1 Water like liquid parabolic temperature dependence 2 Other liquid linear temperature dependence 6 36 Parameter P 61 Speed of sound at apex The following parameter applies only to water like liquids parameter P 60 1 0250 8000 Speed of sound at apex in m s It may happen that the speed of sound is at its maximum at 20 C The speed of sound in parameter P 07 always relates to a temperature of 20
35. d the numerical value Page 54 Establishing a link entering the code number 1 There are two instruction for which the use of the equal sign and the VALUE and is forbidden These instructions are EXIT to quit the communication with the SONOMETER 30 and SAVE to permanently save the date input 2 On the other hand there are instruction words that are only allowed in inquiry instructions or only in setting instructions The former group for example com prises measured values or device type the latter the access code and the reset instructions 3 Serial parameter setting supports only integers Therefore smaller units than those shown on the display panels must be used 4 Instructions that are unknown or do not conform to the format are ignored As the SONOMETER 30 can only transmit as a slave on the instruction of the master it cannot output any fault messages on its own Parameter setting by the serial port is very similar to the parameter input via the keypad All parameters relate to the current channel At first the link with the SONOMETER 30 is established by means of a CODE instruction The code is of the same value as the code number entered via the keypad Again the parameters are set on two levels If the code is valid the keypad of the SONOMETER 30 will be blocked until you quit the serial communi cation by entering EXIT or the system does not detect any instructions for ap proximately 16 minutes You can
36. dure is only required after a previous blockage Parameter P 103 Reset Instruction word RESET Setting level Advanced Programming mode only Instruction class Set Value range 0 1 with the following meaning 0 no activity 1 The SONOMETER 30 makes the reset of the internal microcomputer The pa rameter entries in the memory are not erased parameters not saved will be lost Parameter P 104 Total reset Instruction word TOTALRESET Setting level Advanced Programming mode only Instruction class Set Value range 0 1 with the following meaning 0 no activity 1 The SONOMETER 30 makes the reset of the internal microcomputer All pa rameters including calibrated values are lost and are replaced by default val ues See chapter 10 Parameter P 105 Inquire status Instruction word STATE Instruction class Inquire For the correct interpretation of the returned number a binary evaluation of all bits must be made They have the following meanings 0 Echo flag CH1 An echo of the pulse just transmitted has been detected in channel 1 Bit1 Echo flag CH2 An echo of the pulse just transmitted has been detected in channel 2 Bit2 Measured value flag CH1 Indicates that a value transmission time mean result is available for channel 1 Bit3 Measured value flag CH1 Indicates that a value transmission time mean result is available for channel 2 Bit4 Alarm relay switching state Indicates if the alarm relay has o
37. e Metering and evaluation of transmission time Filling level in meters 3 3 Principle of Operation The ultrasonic sensor of the SONOMETER 30 emits a brief acoustic signal This pulse is transmitted through the vessel bottom in the liquid The sound is reflected by the liquid level and is picked up as echo In level metering the time the ultrasonic pulse needs to travel to the liquid surface and back is of interest This transmission time of the sound is measured by the SONOM ETER 30 The measured transmission time is then adjusted For example the time the sound re Pulse sent Reflection on vessel wall Liquid level echo Multiple reflection a of liquid level echo Transmisison time in liquid Dead time Transmisison time through vessel wall quires to propagate through the bottom of the vessel is deducted A part of the transmitted ultrasonic signal is multiply reflected on the inside wall of the vessel The sensor picks up these reflections as early echo These wall echoes must be eliminated This is achieved by the dead time during which any echo is ignored This means that levels cannot be metered from zero A mean of the measured transmission times is calculated A tolerance band expected range is placed around the calculated transmission time mean Only measured values inside the expected range are included in the calculation of further mean values From the calculated mean transmission time
38. ection is not ob structed In this situation a temperature gradient develops in the sensor i e the tem perature of the sensor housing is lower than that of the vessel The maximum vessel temperature can be 135 C provided the temperature of the electronic circuits remains within the a m range The actual temperature measured depends on a variety of factors and cannot be predicted reliably at this point CAUTION There is risk of burns if the temperature of the sensor housing is above 70 C Page 14 Figure 3 Controls and connections Use shielded control cable 6x0 5 4 2 SONOMETER 30 The SONOMETER 30 is installed in a control cubicle It is mounted to a stand ard 35mm supporting rail The SONOMETER 30 must be protected from the ingress of moisture The degree of protection of the housing the terminals is 20 IPOO The permitted temperature range from 20 C to 70 C must not be exceeded 4 3 Connections Device overview contact 1 Current output for liquid level sensor 2 9 Current output for liquid level sensor 1 Oscilloscope Switching contact 2 2 Switching Switching contact for fault case 8 19 a Pes meee eae 9 LED for switched outputs CY uU LED channel V V A B 2 display Display panel gt Setting buttons soNoMETER 30 is PROBE 2 PROBE 1
39. el at which the percentage volume entered at P 30 is reached 6 25 Parameter P 30 Volume at current reference point 0 000 120 0 Volume in 95 Here you enter the percentage volume relating to level P 29 6 26 Parameter P 31 Reference volume 0 001 9999 Volume in m This parameter provides the link between the percentage volume of a reference point and the absolute volume The specified number is a cubic metre value corresponding to 100 filling of the vessel Page 40 6 27 Parameter 40 P41 Beginning and end of current output 000 0 100 0 Level in 96 for beginning and end of current output These parameters define the level range for the current output Between the values specified as beginning and end a current signal in the range from 0 20 mA or 4 20 mA proportional to the level in the vessel is output Depending on whether the value marking the beginning is larger or smaller than the parameter setting marking the end the current output characteristic shows a positive or negative rise This makes it possible by selecting a suitable entry for parameters P 40 and P 41 to shift the characteristic create a zoom function or invert the current output charac teristic Output 20 mA Beginning End Level 96 Beginning Level 96 Measuring range Measuring range Figure 22 Current output characteristic Beginning End Negative rise of current as level increases Figure 21 Current outp
40. er to parameter P 03 in chapter 6 2 6 14 Parameter 16 Gain for current TCG reference point 0001 0067 Gain step for current TCG reference point These parameters define the gain of the current TCG reference point The gain is calculated as a linear measure between the current reference point and the neighbouring reference points and is adjusted continually as required by the current echo time For setting refer to parameter P 04 in chapter 6 3 6 15 Parameter P 20 Unit of measurement for display output 0000 Level in m 0001 Level in 0002 Filled volume in I 0003 Filled volume in hl 0004 Filled volume in m 0005 Echo time in ms 0006 Sensor temperature in C only meaningful if sensors with temperature detector are used 0007 Compensated speed of sound in m s only meaningful if sensors with temperature detector are used or for reference measurement Note that to obtain a correct reading of level in 96 or filled volume the vessel geometry data must have been specified in parameters P 22 P 31 Page 35 6 16 Parameter P 21 Output interval 0 100 2000 Output interval in s The output interval defines the time intervals at which the current level reading is output via the current outputs the switching contacts and the display panel Please note that the time process of acquiring measured values is essen tially influenced by parameter P 09 noise suppression The output inter va
41. ge 51 7 Advanced Programing mode Continued INTENTIONALLY BLANK PAGE Page 52 8 Serial port The SONOMETER 30 has a serial port for setting parameters and poll meas ured data If the serial port is enabled the SONOMETER 30 switches to programming mode Parameter setting via the keypad and the serial port are therefore exclu sive of each other If for example parameters are set via the serial port the SONOMETER 30 will not respond to the press of a button and the information r485 is shown on the display panel to indicate the current status Only when communication ends the previous information will again appear on the display panel Conversely i e if parameters are being set via the keypad the SONOMETER 30 will only respond to attempts to establish a link via the serial port after the keypad entries have been completed 8 1 Hardware specification The SONOMETER 30 is equipped with a RS 485 interface Up to 32 devices can be connected in parallel to the data lines form a bus Each device is as signed an address a number from 01 to 32 Data is transferred in semi duplex mode i e data is sent and received by the same line Only one subscriber can transmit data while the other devices are receiving The figure below illustrates the working principle for a RS 485 bus with SONOMETER 30 devices Like terminals of all units must be connected with each other GND A PC B
42. hen the vessel is overfull the specified range of the output load cannot be guaranteed It may be necessary to reduce the load to be low 500 ohms Please note further that the current signal refers to the percentage liquid level in the tank or the volume value are taken not to the level in metres see chapter 6 for a description of parameter sets Current output 1 terminals 18 and 19 is permanently assigned to the measuring results of sensor 1 current output 2 terminals 16 and 17 is permanently assigned to the measuring results of sensor 2 only with SONOMETER 30 spec 2xx CAUTION The maximum rated voltage of the current outputs to earth is 50 V Switched output wiring All switched outputs are designed as relay contacts changeover contacts which ensures galvanic isolation from the SONOM ETER 30 The maximum switching current is 5A There is no limitation of the switching current in the SONOMETER 30 Suit able external provision should be made by the owner of the unit Equipment specification Max switching voltage current xx3 and higher 250V 5A Page 19 Figure 8 Visual inspection of the test output using an oscilloscope Test output Connect the oscilloscope to the test output for a visual assessment of the echo pattern Connect the oscilloscope R 1 Meg Ohm to the test output with a test head or other suitable measuring line The following oscilloscope settings are recommended Triggering AC
43. ine RS 485 bi directional Break contact for switching signal 2 Make contact for switching signal 2 Common connection for switching signal 2 Break contact for switching signal 1 Make contact for switching s1 Common connection for switching 1 Break contact for switching signal in case of fault Make contact for switching signal in case of fault Common connection for switching signal in case of fault Positive connection of current signal for channel 2 Negative connection of current signal for channel 2 Positive connection of current signal for channel 1 Negative connection of current signal for channel 1 Table 2 Terminal pin configuration Bottom plug connector Pin Meaning First pole for 24V AC DC feed voltage Internal connection with pin 20 Second pole for 24V AC DC feed voltage Internal connection with pin 22 Reserved not to be contacted Reserved not to be contacted Reserved not to be contacted Positive operating voltage sensor 2 Negative operating voltage sensor 2 Positive connection for current control loop sensor 2 Negative connection for current control loop sensor 2 A line for sensor 2 B line for sensor 2 Positive operating voltage sensor 1 Negative operating voltage sensor 1 Positive connection for current control loop sensor 1 Negative connection for current control loop sensor 1 A line for sensor 1 B line for sensor 1 Connections marked with an asterisk are only available if your
44. ion energy of the ultrasonic pulse and the gain must be set so that the pulse can penetrate the medium and is detected clearly by the receiver 2 An internal time window is generated in the SONOMETER 30 The first echo detected in this time window is measured Notably the dying down of the transmitted pulse must be kept out of the time window The time to the start of the measuring window is referred to as dead time Any echoes detected in this time are ignored The dead time should be defined to ensure that the reflected ultrasonic noise has died down at the beginning of the measuring window Page 23 Figure 9 Echo detection in liquid level metering Proceed as follows e Connect the oscilloscope to the test output of the appropriate channel e Fill the vessel 100 with liquid Ultrasonic pulse dying down Pulse sent Dying down in vessel wall Echo Maybe multiple reflection 200m V Time m gt Trigger pulse Dead time Measuring window e f no echo pulses can be seen as illustrated in figure 9 increase the transmission energy P 03 and or the gain P 04 until ultra sonic signals are received continually Please note that the liquid may be turbulent e g caused by a stirrer or from filling e Shift the beginning of the measuring window by changing the value for the dead time P 05 If you decrement the value the measuring window will shift to the left on the oscilloscope if you incremen
45. isabled 1 The parameters of the current enabled channel are copied to the other channel This function is only available in units with 2 measuring channels specifica tion 2xx Function P 98 is a convenient way to copy the set of parameters from one channel to the other Parameters for adjusting the control currents and the alarm relay cannot be copied Do not forget to save the parameters see chapter 6 43 6 42 Function P 99 Saving parameters This function is enabled after the Parameter Selection menu by showing the word SAFE on the display panel When this is confirmed the follow ing functions can be enabled Settings 0 The parameters are not saved edited parameters will be lost by a failure of the voltage supply As areminder F 09 flashes e To set new parameters you need not enter a code number 1 e The parameters are saved permanently They will not be lost even if the voltage supply fails e Access to the parameter data is only possible after entering the code number When you have completed confirmed all entries the software quits the pro gramming mode and the word End is shown on the display panel Page 47 7 Advanced Programing mode INTENTIONALLY BLANK PAGE Page 48 7 Advanced Programing mode Continued INTENTIONALLY BLANK PAGE Page 49 7 Advanced Programing mode Continued INTENTIONALLY BLANK PAGE Page 50 7 Advanced Programing mode Continued INTENTIONALLY BLANK PAGE Pa
46. itions They can smoothen the result e t may happen that the transmission energy and the gain required for a full vessel are too high for making the measurement on a vessel with a less than complete filling To reduce the dead time it is possible to correct the transmission energy and the gain with the parameters P 12 P 16 as re quired by the echo to return Page 25 Calculation of liquid level Conversion to percentage level of vessel volume Display panel information Current signal Switching signal Temperature compen sation Device address Copying parameters to the other channel Saving parameters The time the signal needs to penetrated the wall of the vessel P 10 wall time is deducted from the measured total transmission time of the ultra sonic pulse The liquid level in units of metres is calculated from the echo time with con sideration of the speed of sound P 07 in the liquid with which the vessel is filled The percentage level is calculated by means of parameter P 25 100 level in metres and parameter P 22 shape of vessel All outputs relate to the percentage filling of the vessel The percentage level is proportional to the volume of the vessel This re quires input of the dimension data of the vessel P 23 P 31 If the measured value proportional to the level is suficient enter the maxi mum level in metres as the 100 level in P 25 and specify the vessel as a sphere P 22 2 thi
47. l merely influences the time behaviour of the output This parameter should be edited if e the rate at which the digits on the display panel change is to be reduced e the rate at which the connected consumers are switched on or off by the switched outputs is to be reduced pumps etc e the rate at which a higher level control samples the level via the current output is to be increased 6 17 Parameter P 22 Shape of vessel 0 Upright cylinder with without conical end 1 Lying cylinder 2 Rectangular vessel 3 User defined shape specify reference points rEF Reference measurement only possible on channel 2 These parameters are required for the conversion of the level data to filled volume data according to the geometrical shape of the vessel Depending on the shape the following parameter groups are of relevance Standard vessel e P23 Dimension 1 e P24 Dimension 2 e P25 100 level e P26 Height at which sensor is mounted User defined vessel shape e P26 Height at which sensor is mounted e P27 Number of reference points e P28 Reference point selection e P29 Level in m at selected reference point e P30 Filled volume in at selected reference point e P31 Filled volume at 100 in m Reference measurement e P23 Dimension 1 i a vessel diameter The location of each of the above dimensions can be seen from the follow ing illustrations Page 36 Vessel shape 0 Upright cylinder with or wi
48. lowing meaning xx principal version yy sub version Function P 98 Copy parameter sets Instruction word COPYALL Instruction class Set Value range 0 1 this function is only implemented in specification 2xx devices with the following meaning 0 no activity 1 all parameters of the current channel are copied in the other channel except calibrated values P11 P46 Function P 99 Save parameters Instruction word SAVE Instruction class non parametrised instruction No value range defined Page 61 Parameter P 101 Device configuration Instruction word IDENT Instruction class Inquiry The device type can be inquired with this instruction Value range 2 SONOMETER 30 specification 1xx 3 SONOMETER 30 specification 2xx Parameter P 102 Release or block measuring procedure Instruction word ENABLE Parameter setting level Advanced Programming mode only Instruction class Set and inquire Value range 0 1 with the following meaning 0 Blocks the measuring procedure the sensors carry out no more measuring func tion No fault message is generated The current outputs constantly supply the last current value This instruction is particularly of interest for applications with several SONOMETER 30 units on one vessel redundant configuration Nor mally the units would interfere with each other acoustic cross talk 1 Release measuring procedure normal operating state An explicit release of the measuring proce
49. lowing settings are re quired Transmission energy 1 20 The echo is also stable at transmission energy 3 gain 20 Echo time Level Transmission energy Gain 0 1 ms 75 mm 1 10 3 ms 2 25m 1013 20 10 75 3 35 The situation as described requires 2 TCG reference points The following defined parameters are entered P 03 transmission energy at start Step 1 P 04 gain at start Step 10 P 05 dead time 0 100 ms 13 select 15 TCG reference point 1 14 timing of 1 TCG reference point 3 000 ms 15 transmission energy of 15 TCG reference point Step 3 16 gain of 15 TCG reference point Step 20 P 13 select 2nd TCG reference point 2 P 14 timing of 2nd TCG reference point 10 00 ms 15 transmission energy of 2nd TCG reference point Step P 16 gain of 2nd TCG reference point Step 35 P 12 number of reference points and enable TCG 2 Page 33 Figure 12 time controlled gain Figure 12 illustrates the adjustment of transmission energy and gain in the above example Gain Energy step step 354 30 Pee S E RENDERE i MER 5 transmiss energy gt 010 11 2 3 4 5 6 7 transmiss time ms 10 6 11 Parameter 12 Enable reference point number for TCG OFF Time controlled function off 0001 0010 Number of reference points for TCG This parameter disables enables the time controlled g
50. measuring mode to program ming mode 1 Programming by means of 3 hidden buttons and the display panel on the front plate of the SONOMETER 30 2 Programming by the serial interface RS 485 During serial commu nication the word r 485 is shown on the display panel 5 3 Functions of buttons There are three hidden buttons in the right hand part of the front plate These buttons have the following functions in measuring mode e Button lt P gt Changes to programming mode e Button lt gt Switches the display to measuring channel 1 e Button lt gt Switches the display to measuring channel 2 Switching from one measuring channel to the other is only possible on 2 channel versions of the SONOMETER 30 specification 2xx In programming mode the buttons perform a second function e Button lt P gt Selects a parameter confirms entries e Button lt gt Increments the selected parameter e Button lt gt Decrements the selected parameter Page 21 Enabling the program ming mode CodE Code number input Normal programming mode Advanced programming mode Wrong code number Parameter Selection menu Parameter display Button lt gt Increments value Button lt gt Decrements value Button lt P gt Next parameter 5 4 SONOMETER 30 parameter settin 1 Starting the programming mode Pressing button once for about 2 seconds starts the programming mode The word CodE is shown
51. ment and all tools used for service must be grounded as prescribed e The protective conductors must be continuous and not broken e TheSONOMETER 30 must only be used in the specified temperature range from 20 to 70 C the sensor in the temperature range from 20 to 80 C e The temperature resistance of the connecting cable must be adapted to the operating tem perature of the measuring system e operation the enclosures of both the unit and the sensor must remain closed e Pullall plug connectors on the equipment before opening a housing e All connections in particular switched outputs must be made with the supplied screw termi nals All terminal screws including those on terminals not in use must be tightened touch guard safe from finger touch e The unit must only be supplied with voltage from a source through a breaker e The owner must make certain that the current on switched outputs does not exceed the rated limit of 5 amps This can be ensured for example by a fusible link e The SONOMETER 30 must not be exposed to liquid The cable between the SONOMETER 30 and the sensor must be shielded e Thesensors should be handled with care and screwed in only hand tight If they are tightened fully the contact face may be damaged e Avoid electrostatic charge Page 5 Service note Replace the fuse Maintenance opening the equipment The SONOMETER 30 and the Penetrating Pulse Technology sensor require n
52. o maintenance Opening the sensor housing is only necessary for installation Interrupt the volt age supply before opening the housing The sensor does not contain wearing parts It may be necessary to open the housing of the SONOMETER 30 to replace the fuse Pull all plugs before opening the housing The voltage feed line terminals 20 24 and the sensor feed terminals 33 34 and 27 28 respectively have fusible links These fuses must only be replaced by authorised service personnel If a fuse blows the cause must be identified Use type TE 5 fuse as a replacement e Install a 630 mA T fuse in the voltage supply line e Install a 100 mA T fuse in the line feeding the sensors Use only fuses of the specified rating Do not use a fuse of higher rating or jumper a fuse Page 6 3 3 1 Introduction Overview Liquid level meters of the SONOMETER series work on the penetrating pulse echo principle This measuring method has several benefits The sensors are attached to the outside of the vessel they are not in exposed to the liquid in the tank As measurement is made from outside the liquid can be pressurised or be chemically toxic or aggres sive This has no effect on the measurement The measuring method is particularly suitable for applications in the pharmaceutical food and bever age industries Foam on the liquid does not affect the accuracy of the measurement The system can easily be fitted to existing
53. of sound coupling is essential to the sensitivity of the measuring system Therefore the following points should be noted The face to which the sensor is attached on the outside of the vessel must be plane and smooth Uneven attachment faces e g on glass vessels make sound contact more difficult and the results may not be correct in some cases Unevenness of the attachment face can be compensated to some degree by applying a suitable mounting compound Peak to valley height should be 10 um Paint or surface treatment are detrimental to good metering results There should be no peak or mark e g chisel marks with lateral bulging or similar These can damage the sensor when it is installed Install sensor with mounting compound To ensure good sonar contact apply a mounting compound between the sen sor and the vessel Use special adhesive if you want a permanent bond Apply a finger nail size bead of the adhesive to the tip of the sensor When the adhesive spreads evenly when the sensor is screwed in or pressed to the at tachment face Mounting compound and special adhesives are available from HiTECH Technologies Page 11 1 01 1 MHz D20mm without temperature compensation order 0141 1001 01 60 AEO01 02 1 MHz D20mm with temperature compensation order 0141 1001 02 Attachment versions material 1 4571 199 36 33 242 5 lt N Weld in ring orde
54. or contact verification 7 7 Parameter 72 Gain for sensor contact verification 7 8 Parameter P 73 P 74 Gate beginning gate width for sensor contact vium 7 9 Parameter P 91 Asynchronous cycle rate 8 Serial Dort nennen 8 1 Hardware specification 8 2 10954 8 8 Set of instructions for serial port 9 Troubleshooting esee nennen nennen nennen nennen nenas 9 1 Troubleshooting aci Lc e Le eL e De e Dade meus 9 2 D vicetaults tes 9 3 Warnings ec 10 veu 11 Technical 22 1 Safety alerts and other symbols used This safety alert symbol indicates an immediate hazardous situation If not avoided it will result in serious injury or damage to the equipment When you see this symbol do not use the equipment further unless you have fully understood the nature of the hazard and have taken the required precautions This alert symbol indicates a potential hazard to the operation of the equipment When you see this symbol follow the prompts in this User s Manual to avoid the hazard Call our service team if necessary This symbol indicates that you should call our service department
55. play panel Page 30 Figure 11 Assessment of level data with reference to expected range 6 7 Parameter 08 Expected range Settings 0 8 100 0 Expected range in of the currently measured level The SONOMETER 30 calculates a mean of all measured values The mean value is calculated only of measured values within the expected range The expected range is calculated again after every measuring cycle and adapted to the current liquid level Where signal conditions are favourable the expected range should be pro grammed to be as small as possible This makes the level measurement most accurate If wrong level data are supplied repeatedly the expected range should be made larger Measured value outside expected range Measured value in expected range Current mean value Missing measured value Expected range is calculated anew and the mean value adjusted gt Time Example The parameter P 08 in the SONOMETER 30 is set to step 6 2 96 The surface of the liquid in the tank is in motion and waves are forming It is possible that the first level echo was deflected and not picked up whereas multiple reflections were detected much later The definition of 6 2 expected range which is in the range of the last correct measured value this measured value is not used for the calculation of the mean The interference is completely ignored for the output 6 8 Parameter P 09 Noise suppression Setting
56. r 01 5051 21 01 01 05 1 MHz D20mm without temperature compensation M30x1 5 order no 0141 1001 05 75 80 T PG 11 gland Installation height Srew on module order no 01 50 51 01 Vessel surface 114 mm NN 33 242 5 21 Weld on ring order 01 5051 1101 75x80 80 x 80 Plate for strap fastener weld or glue order 01 50 52 21 01 60 01 06 1 MHz D20mm with temperature compensation M30x1 5 order 0141 1001 06 Attachment versions i material 1 4571 40 23 ME Weld in ring order no 01 5001 21 02 Wil PG 11 gland Vessel surface 1 Installation height 114 M30x1 5 Weld on ring order no 01 5001 11 02 Figure 3 Dimensions of series 01 sensors and attachment versions Page 12 Plate for strap fastener weld or glue order no 01 50 02 21 02 AE20 01 0 5 MHz D35mm without temperature compensation orderno 0141 100201 AE20 02 0 5 MHz D35mm with temperature compensation 60 75x80 Wil PG 11 gland Screw on module order no 01 50 51 02 Installation height 120 order no 0141 100202 Vessel su
57. r adapter Please configure your serial port as follows Baud rate 9600 Bit s 8 data bits 1 stop bit no parity 8 2 Log Communication with the SONOMETER 30 proceeds in the form of instructions which consist of ASCII characters Each instruction is concluded by a carriage return char acter symbol CR value 13 20D The SONOMETER 30 accepts only capi tal letters digits and several special ch amp tacters The instruction format is the follow ing ADDRESS INSTRUCTION WORD VALUE lt CR gt e ADDRESS is the device address see chapter 6 40 of the respective device it is preceded and followed by the lozenge sign e f you want to address all devices at the same time you can specify ALL between the two lozenge signs This works only with so called set instructions see below e INSTRUCTION WORD indicates the key word for the respective parameter see chapter 8 3 Set of instructions for serial port e The equal sign separates the instruction word from the instruction value It must always be entered e VALUE stands for a number of question mark 2 This is the difference be tween instructions which set a parameter to a certain numerical value and in structions which inquire for the number value of a parameter If an inquiry instruction is sent the respective SONOMETER 30 replies to the in quiry The reply uses the same format as the instruction i e it consist of the ad dress the instruction word an
58. r has not picked up Bit5 Relay 1 switching state Indicates if relay 1 has picked up Bit6 Relay 2 switching state Indicates if relay 2 has picked up Bit7 always 0 Page 62 Parameter P 106 Inquire measured value percentage level Instruction word MEASDAT Instruction class Inquire Feedback value 0 12000 a hundred times percentage value Note If the level simulation is enabled the value set there is returned Parameter P 107 Inquire temperature value Instruction word TEMPDAT Instruction class Inquire Feedback value ten times the Kelvin value For examples of conversion to centigrade see parameter P 62 Parameter P 108 Inquire compensated speed of sound Instruction word REALVEL Instruction class Inquire Feedback value Speed of sound in m s on which the measuring process is currently based Parameter P 109 Inquire fault Instruction word ERROR Instruction class Inquire Feedback value 0 255 see chapter9 2 The number xx of the fault is output and shown as F xx on the display panel If several faults are detected at the same time the number of the most serious fault is displayed If this is repaired the fault that is next less serious is shown and so on until all faults have been shown If the SONOMETER 30 works prop erly the feedback is zero Parameter P 110 Inquire warnings Instruction word WARNING Instruction class Inquire Feedback value 0 255 see chapter 9 3 This paramete
59. r has the same function as parameter P 109 Page 63 9 Troubleshooting 9 1 Troubleshooting If your SONOMETER 30 does not give the correct level reading the fault must be located As a first step find out if the problem is sonic or electrical Please work through the following checklist Is the SONOMETER 30 supplied with 24 V AC DC operating voltage Is the sensor connected properly Is the sensor making full contact with the mounting compound Is the sensor set up vertically aligned to the sound reflecting surface Is there liquid in the vessel Is the dead time setting correct Does noise by sound reflection on the vessel wall interfere with the measuring process in the gate Do baffles interfere with the sound path Does the liquid contain too many foreign objects or bubbles Is there strong turbulence Is the setting of the transmission energy and or the gain low Has the liquid changed in the course of operation Has the temperature or the concentration of the liquid changed substantially Is equipotential bonding ensured between the vessel and the housing Are both shields of the sensor cable properly connected to earth If the SONOMETER 30 detects a device fault an appropriate message is displayed on the display panel The evaluation is different for faults and warnings For details see the respective passages of this Manual Call our service team if you have a problem We will be glad to assist you to ensure smoo
60. rating voltage This avoids wrong connection poa due to potential differ ence Current output 1 1 Relay 17 1 Relay 2 Mikrocomputer Test output R 485 Please note that the electric isolation of the assemblies is limited to an isolation strength of 50V The galvanic isolation must not be used to disconnect the mains supply Disconnect the mains supply by means of an externally connected power supply unit Figure 10 contains an illustra tion of the assemblies with isolated supply voltage and the appropriate ter minal connections Protect the unit effectively from transient interference e g light ning The SONOMETER 30 is ready for operation approximately seconds after starting the operating voltage Page 18 Table 3 Maximum switching voltage by equipment specification Current output wiring The current output provides a 0 20 mA and 4 20 mA signal respec tively that is proportional to the liquid level in the set range The current output is of floating type It provides a correct signal of the output load in the range 0 500 ohms at current values between 0 4 20 mA If a load resistance of 500 ohms is added a voltage proportional signal in the range of 0 2 10 V can be obtained An output that is not required must not be wired Note Please note that if the current value output is larger than 20 mA e g w
61. rent value is guaranteed up to 20 mA only Parameter P 46 Adjustment of current output Instruction word CALCURR Setting level Advanced Programming mode only Instruction class Set and inquire Value range 0 3000 Parameter P 50 Configuration of switched output 1 and Parameter P 51 Configuration of switched output 2 Instruction word REL1 REL2 Instruction class Set and inquire Value range 0 2 with specification 1xx 0 3 with specification 2xx with the following meaning No Configuration No Configuration 0 permanently disabled 2 switches according to channel 1 level 1 permanently enabled 3 switches according to channel 2 level Parameter P 52 Level limit of switched output 1 and Parameter P 54 Level limit of switched output 2 Instruction word SWLEVEL1 SWLEVEL2 Instruction class Set and inquire Value range 0 12000 a hundred times percentage value Parameter P 53 Hysteresis of switched output 1 and Parameter P 55 Hysteresis of switched output 2 Instruction word HYST1 HYST2 Instruction class Set and inquire Value range 0 5000 a hundred times percentage value Page 59 Parameter P 56 Alarm switched output configuration Instruction word ALARMREL Instruction class Set and inquire Value range 0 2 for specification 1xx 0 4 for specification 2xx with the following meaning No Configuration No Configuration 0 permanently disabled 3 Switches only if fault in channel 2 1 permanently enabled 4
62. rface Pd CN t Attachment versions k material 1 4571 d i 5 C Be e e 9 N 1 o oS 260 60 1 95 80 weld in ring weld on ring Plate for strap fastener weld or glue order no 01 505121 02 order no 01 5051 11 02 order no 01 50 52 21 02 AE20 05 75x80 0 5 MHz D35mm without temperature compensation 45 1 5 1 order no 0141 100205 INESSE PG 11 gland AE20 06 Installation height 120 0 5 MHz D35mm with temperature compensation 45 1 5 order no 0141 1002 06 Vessel surface Pd EN P d m Pd amp 4 Attachment versions P material 1 4571 18 weld in ring order 01 50 01 21 03 731535 15 weld on ring order no 01 50 01 11 03 Figure 4 Dimensions of series AE20 sensors and attachment versions Page 13 80 x 80 Plate for strap fastener weld or glue order no 01 50 02 21 04 Install sensor only hand tight Operating temperature Example Sensor attached to vessel no convection possible Example 2 Sensor attached to vessel with good convection A If the sensor is attached by means of screw type module install the sensor in the receiver and screw the cap hand tight The sensor can be aligned to some degree by tightening the cap i e deviation caused during inst
63. rrent TCG reference point 34 6 14 Parameter P 16 Gain for current Trr reference point 35 Page 2 6 15 Parameter P 20 Unit of measurement for display output 6 16 Parameter P 21 Output interval 6 17 Parameter P 22 Shape of vessel 6 18 Parameter P 23 P 24 Dimension 1 Dimension 2 6 19 Parameter P 25 100 level 6 20 Parameter P 26 Mounting height of sensor 6 21 note if vessel is of user defined 6 22 Parameter P 27 Number of reference points 6 23 Parameter P 28 Select reference 6 24 Parameter 29 Level at current reference 6 25 Parameter P 30 Volume at current reference point 6 26 Parameter P 31 Reference volume eese 6 27 Parameter P 40 P41 Beginning and end of current output 6 28 Parameter P 42 Current output range 6 29 Parameter P 43 Current for wrong 2 6 30 Parameter P 44 Current in case of device 6 31 Parameter P 50 P 51 Configuration of switched output 1 2
64. ruction word TCGGAIN Instruction class Set and inquire Value range 1 67 In steps Parameter P 20 Unit of measurement for display output Instruction word UNIT Instruction class Set and inquire Value range 0 7 with the following meaning No Unit No Unit 0 Level in metres 4 Volume in cubic metres 1 Volume in percent 5 Transmission time in milliseconds 2 Volume in litres 6 Sensor temperature in C 3 Volume in hectolitres 7 Compensated speed of sound in m s Parameter P 21 Output interval Instruction word OUTPER Instruction class Set and inquire Value range 0 13 In steps with the following meaning Step Output interval Step Output interval Step Output interval 0 0 15 5 5s 10 200s 1 0 25 6 108 11 500 8 2 0 55 7 205 12 10005 3 1s 8 50s 13 2000 s 4 2s 9 100s Parameter P 22 Shape of vessel Instruction word FORM Instruction class Set and inquire Value range with spec 1xx 0 3 with spec 2xx channel 1 0 3 channel 2 0 4 with the following meaning No Vessel shape No Vessel shape 0 Upright cylinder 2 Cube tank with without discharge cone 3 User defined vessel shape 1 Lyingoylinder 4 Reference measurement Parameter P 23 Dimension 1 and Parameter P 24 Dimension 2 Instruction word DIST1 DIST2 Instruction class Set and inquire Value range 0 20000 mm Page 57 Parameter P 25 100 level Instruction word MAXLEVEL Instruction class Set and inquire Value range 1 40000 mm
65. s 0 100 2000 Noise suppression time in s The number setting indicates the period in which the SONOMETER 30 gathers measured values or tolerates wrong measured values before switching to wrong measurement no E on the display panel This parameter should be set to as small a value as possible where conditions are good Example In the case on hand it cannot be excluded that air bubbles form when liquid enters the vessel Air bubbles form regularly after every 10 minutes for a period of 1 minute Readings are not possible during this time Recommended setting P 9 100 5 This means that the correct value is held for a maximum period of 100 s during which no reading can be taken As soon as the trouble factor disappears the unit resumes regular measuring mode Page 31 6 9 Parameter P 10 Wall time Settings 0001 0100 Wall time in us This parameter defines the wall time of the ultrasonic pulse in the wall of the vessel This is a function of the wall thickness and the material of the vessel The table below contains the wall time i e the distance to and fro of the sound in different materials 6 0 171 2 24 18 Steel Jo 1 12 pF Glass 0 7 Table 6 Wall time in us as a function of vessel material and wall thickness of the vessel 6 10 More information on time controlled gain TCG As the ultrasonic pulse propagates in the liquid its intensity decays To make an echo clearly
66. s is default setting The SONOMETER 30 can show the measured values in several units e g metres litres cubic metres The unit is selected with P 20 Parameters P 40 and P 41 define the percentage values for the start point and the end point respectively of the current signal P 42 specifies whether the smallest current is 0 mA or 4 mA Besides current values can be defined which are output if a fault is detected in the device or a measured value is wrong The 2 independent switching contacts are assigned to the measuring chan nels with parameter P 50 and parameter P 51 The switching point is en tered as a percentage value via parameters P 52 P 54 a hysteresis can be programmed with P 53 P 55 The separate ALARM switching contact can be blocked or assigned to the measuring channels with parameter P 56 The calculation of the speed of sound as a function of the temperature is released with P 60 The measure of temperature dependence is entered via parameters P 61 P 63 This function will only work if sensors with integrated temperature detectors are used If the serial port of the SONOMETER 30 is used you should assign a device address with parameter P 90 If you are using a 2 channel SONOMETER 30 specification 2xx in which both sensors perform similar measuring tasks you can enable a copy func tion with parameter P 98 and copy all parameters from the current channel to the other channel The entered parameters are
67. second channel permits the metering the level in a second vessel or to increase the measuring accuracy of the first channel if the medium its concentration or temperature change substantially As a rule the SONOMETER 30 is located in the control room The distance to the sensor on the vessel can be up to 300 meters Page 7 3 2 System components The SONOMETER 30 system consists of the following components e the SONOMETER 30 evaluator e or two ultrasonic sensors of AE series e fixing bracket on the vessel e connecting cable between sensor and evaluator The selection of the suitable ultrasonic sensor and the appropriate bracket depends on e the geometrical shape of the vessel e material of which the vessel is made e the nature of the monitored liquid Our service staff will be glad to assist you in choosing the most suitable sensors and brack ets The following types are currently in the market Sensor Type Frequency Temp Sensor Mounting AE01 Spec 01 1 MHz No Screw on module AE01 Spec 02 1 MHz Yes Screw on module AE01 Spec 05 1MHz No Screw thread M30x1 5 AE01 Spec 06 1 MHz Yes Screw thread M30x1 5 AE20 Spec 01 500 kHz No Screw on module AE20 Spec 02 500 kHz Yes Screw on module AE20 Spec 05 500 kHz No Screw thread M45x1 5 AE20 Spec 06 500 kHz Yes Screw thread M45x1 5 Page 8 Pulse sent and echo received Transmission time measurement Figure 2 Echo detection in level metering Dead tim
68. t it the measuring window shifts to the right e The end of the measuring window P 06 should be set to indi cate the maximum filling level This point in time is marked by the level echo at the moment of maximum filling The measuring win dow should not be longer than required Page 24 Figure 10 Fundamental parameters at start up Detection of echo in case of adverse sonic conditions Transmission time related gain 5 6 Measured value processing After setting the echo detection the SONOMETER 30 is adjusted to your proc ess conditions The required changes of parameters are discussed with reference to an exam ple in chapter 6 of this Manual Basic procedure of measured value processing P 50 51 Channel assign P 52 54 limit in P 53 55 hysteresis Further parameters for measured value processing Echo detection P 03 transmiss energy P 04 gain Y Measuring range in millisecs P 05 dead time P 06 measuring window Y Level in metres P 07 speed of sound Y 22 vessel shape Level in per cent P 25 100 level 4 20 unit of Sw signal Display measurement Y Current signal P 40 Analogue start in 96 P 41 Analogue end in 96 P 42 Current type e The parameters P 08 Expected range and P 09 Noise suppression im prove the behaviour of the SONOMETER 30 in case of adverse acoustic cond
69. th service of your SONOMETER 30 9 2 Device faults Device faults either affect or prevent measurement If a fault is detected the alarm relay drops the appropriate LED lights and a fault message is shown on the display panel If several faults are detected at the same time the most serious fault is shown If echo is lost shown as no E on the display panel the current for wrong reading chapter 6 30 is shown in other cases current in case of device fault chapter 6 31 is shown If both occur together the device fault current flows The fault code on the display panel can be polled via the serial port In the 2 channel SONOMETER 30 the fault code of the current channel is dis played or output via the serial port A condition for the output of fault messages is that the SONOMETER 30 was not stopped Page 64 noE FO1 F02 F03 F05 F06 F07 F08 F10 F11 The sensor does not receive an echo from the sound reflecting surface The following causes are especially likely e Liquid level outside the measuring range Transmission energy and or gain not strong enough Gate beginning and or measuring window settings wrong Sensor has failed and or cable is broken Strong motion on liquid surface for a period exceeding the noise sup pression setting The hash total by the program memory is wrong This is a particularly grave fault The SONOMETER 30 would cease to operate properly and was there fore stopped If
70. the level in is calculated in units of meters on the basis of the speed of sound The speed of sound depends on the kind of liquid concentration and temperature If the speed of sound changes substantially the calculation must be compensated Page 9 Compensation with temperature sensor Compensation with reference measurement Percentage level Output Compensation with integrated temperature sensor If the vessel always contains the same liquid changes of the speed of sound due to temperature can be eliminated by a first approximation This can be done with sensors with integrated temperature detector However inaccurate measured data are still possible because of the layers of different temperature in the liquid Compensation with reference measurement If the vessel is filled with another liquid the concentration or chemical composi tion of the medium changes the real speed of sound must be measured con stantly In applications of this type the second measuring channel of the SO NOMETER 30 can be used for reference measurement In this case the first channel uses the new sonic speed data The percentage level is the basis for all subsequent calculations and outputs To concert the liquid level from units of metre in percentage knowledge of the ves sel shape and its actual dimensions is required Moreover the maximum liquid level must be specified that corresponds to a filling volume of 100 To calculate the filling
71. the sensor and or in the SONOMETER 30 Please contact our service team Detection of fault F 11 must be permitted by parameter P 70 Page 65 F12 F20 F22 F31 F32 The sensor detects no signal Possible causes include a broken cable a defect in the electronic circuitry of the sensor If a wiring check is inconclusive please inform our service team You have enabled temperature measurement parameter P 60 but the SONOMETER 30 receives no temperature signal Either the connected sensor has no temperature detector or the temperature detector is defec tive The temperature detector in the sensor has detected a temperature outside the permitted range from 20 C to 135 C The entry data of transmission time related gain lack plausibility A possible cause may be that the values for the times of the permitted reference points P 14 are not growing steadily Please also inspect if the setting of the number of permitted refer ence points P 12 is correct The entry data for the vessel lack plausibility Please verify the parameter values under the aspect of the following possible causes Upright cylinder type 0 Dimension 1 diameter is zero Horizontal cylinder type 1 Dimension 1 length and or dimension 2 diameter is zero It is also possible that the 100 level is higher than the diameter of the vessel Cube shape vessel type 2 Dimension 1 length and or dimension 2 width is zero User defined sh
72. ther channel P 99 X x Saving parameters 0 no saving 1 saving permanently Table 4 Parameter overview Page 27 6 1 Parameter P 02 Channel selection This parameter is only available in devices with two measuring channels specifica tion 2xx This parameter selects the measuring channel in programming mode All further entries of parameters relate to the channel selected here The green LED for CH1 and CH2 respectively lights to indicated the selected channel e Switching to channel 1 lt gt CH 1 2 green LED CH1 lights e Switching to channel 2 lt gt CH 2 lt P gt green LED CH2 lights The channel can also be selected in measuring mode before starting the pro gramming mode 6 2 Parameter P 03 Transmission energy Settings 0001 0009 Transmission energy steps This parameter specifies the energy content of the emitted ultrasonic pulse The higher the transmission energy the higher the energy content of the emitted ultra sonic pulse 6 3 Parameter P 04 Gain Settings 0001 0067 Gain steps The electronic circuitry amplifies the reflected ultrasonic pulse echo and then con verts it into a digital signal triggering This parameter sets the strength of gain The setting should preferably made with visual inspection by an oscilloscope con nected to the test output see chapter 4 3 2 If echo signals are detected a little arrow appears in the top left corner of the display panel
73. thout conical end Figure 13 to Figure 16 Dimension 1 Dimension 1 1 FL L3 100 level 100 level f gt 100 level Dimension 2 Dimension 2 096 level 096 level NOY 0 level EErEE NS b t A e ai Installation height Sansir 7 gatos Example Upright discharge upright cylinder discharge upright n above floor installation dimension 2 zero height of installation zero Figure 15 Upright cylinder without Figure 14 Upright cylinder with discharge cone discharge cone sensor mounted in sensor in discharge cone vessel bottom Figure 13 Upright cylinder with discharge cone sensor at connection Vessel shape 2 Rectangular vessel Figure 17 and figure 18 Vessel shape 1 Horizontal cylinder Figure 16 Dimension 1 Dimension 2 Dimension 2 Dimension 2 100 level Dimension1 4 Dimension 1 100 1 YK 0 level 14822221 Sensor a 2 5 0 level 0 level m 100 level Sensor Installation height Sensor Example Example Example cube subfloor installation lying cylinder installation height zero cube installation height zero Figure 17 Rectangular vessel Figure 18 Rectangular vessel sensor mounted in discharge connection Figure 16 Horizontal cylinder sensor sensor mounted in vessel bottom mo
74. through the cap and the insert Terminate six wires with wire end ferrules Bend back the shield over the O ring in the insert cf Figure 6 Cable Screen Wires approx 60mm m BS Insert e Install the wires through the cable bush and fully press in the insert this causes the shield to be pressed to the inside of the cable bush e Screw the cap tight this fixes the cable and makes it insensitive to tensile stress e Connect the terminals e Close the housing cover The installation will be easier if you pull the screw terminals off the electronic circuits when making the connections On metal vessels the sensor is earthed by its housing If the vessel is made of non conducting material you should earth it by means of the earth terminal screw on the bottom of the sensor housing 4 3 2 Connecting the SONOMETER 30 The connections of the SONOMETER 30 to the ultrasonic sensor and the subsequent control are made by screw terminals located on the top and bottom of the enclosure see table 2 To make installation of the connecting lines easier the screw terminals can be pulled off Page 16 Top plug connector Pin Meaning Ground for oscilloscope Channel 1 test output for visual inspection with oscilloscope Channel 2 test output for visual inspection with oscilloscope Ground for serial interface RS 485 A line RS 485 bi directional B l
75. unted in vessel bottom Page 37 Vessel shape 3 User defined shape Figure 19 level Volume Volume Reference Volume absolute percent point No percent A A A A A 100 45 10 07 104 0 10 110 level 4 0m 9 68 m 100 100 3 5m 9 29 m 96 0 9 907651 3 3 9 06 m 93 6 8 809 3 1 m 8 65 89 3 7 2 3 0 m 8 37 86 5 6 70 60 50 40 30 10m 2 09 m 21 6 5 20 0 7m 1 18 m 12 2 4 installation 0 4m 0 435 m3 4 5 3 10 height 0 2m 0 117 m3 1 2 2 A 0 1 0 05 1 15 2 25 3 35 4 45 c level metres sensor Figure 19 User defined vessel shape Enter filling curve with reference points parameters P27 P 31 Reference measurement Dimension1 1 2 8 4 8 6 7 9 10111213 14 15 16 17 18 18 1 ND CHI GND wow B Test RECT Re 28 Probe 2 SONOMETER 30 BA PROBE PROBE 1 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Figure 20 Using a second channel as reference path For reference measurement you need a meter
76. ut characteristic Beginning End Positive rise of current as level increases Note Limitation of current starts at about 22 24 mA Current values higher than 20mA reliable indicate overfilling Please note that the electrical specification of the current output to the maximum burden can only be guaranteed in the range from 0 20 mA 6 28 Parameter P 42 Current output range 0 20 Current output in range 0 20 mA 4 20 Current output in range 4 20 mA Page 41 6 29 Parameter P 43 Current for wrong reading 000 0 022 0 Current in mA OFF Last current value output remains on display panel Here you can set the current which is output if a reading is wrong on the display panel e g no E This value is unrelated to the range setting of the current output Parameter P 42 0 4 20 mA If a value larger than 22 0 mA is specified the word OFF is shown on the display panel In this case the current value will not change in case of a wrong reading For output of value currents higher than 20 mA see chapter 4 3 2 6 30 Parameter P 44 Current in case of device fault Settings 000 0 022 0 Current in mA OFF Last current value output remains on display panel Here you can define the current which the SONOMETER 30 puts out if no reading of the liquid level can be taken If a device fault has occurred the fault current output presupposes that the SONOMETER 30 was not stopped For setting please read the
77. with 2 measuring channels specification 2xx Page 38 In reference measuring mode the second channel measures the speed of sound The measured speed is used by the first channel to calculate the level The sensor in the second channel must be mounted to ensure that the sound signal travels horizontally through the vessel The vessel diam eter is specified as dimension 1 in channel 2 6 18 Parameter P 23 P 24 Dimension 1 Dimen sion 2 0 000 20 00 Dimension 1 or dimension 2 in m 6 19 Parameter P 25 100 level 0 001 40 00 Level at 100 in m 6 20 Parameter P 26 Mounting height of sensor 9 990 9 999 Sensor mounting height in m 6 21 To note if vessel is of user defined shape Select the user defined vessel shape if your vessel does not fit completely or even nearly into any of the above shapes The geometrical shape of the vessel is not important The characteristic of filling the vessel is indicated by reference points Each reference point rep resents a pair of values consisting of the liquid level in units of metres and the appropriate filled volume in percent You can enter 2 30 reference points A linear rise of the filled volume is assumed between any two refer ence points Level and percentage volume must increase from one reference point to the next The distance between any two reference points need not be the same The first reference point is always numbered 1 The percentage volume
78. y the combined action of transmission energy gain and dead time is visible at the test output When the unit is started up at first the required values for the maxi mum and minimum levels are determined with parameters P 03 P 04 P 05 are de termined Next the reference point parameters are defined and programmed on this basis Then the TCG function is enabled and its operation checked While TCG is enabled an echo search of the whole measuring range is made in regular intervals This avoids latching and cogging of the SONOMETER 30 when echo noise or multiple echo is detected If the echo is lost by fault the whole measuring range is searched for echoes until the fault is over The programming of the TCG function will now be explained by way of an example The vessel is filled to a level of 7 5m this is equal to 100 filling of the vessel At the speed of sound of 1 500 m s the echo time is 10 ms With disabled TCG the follow ing values are measured at which echo become stable Transmission energy 3 gain 35 A dead time of 0 5 ms was recorded The corresponding minimum filling is 375 mm If the liquid level is low the following settings already supply stable echo Transmis sion enrgy 1 10 The dead time is reduced to 0 1 ms This corresponds to a minimum filling of 75 mm Finally an intermediate value for the switchover point of the transmission energy is calculated At a level of 2 25 m echo time 3 ms the fol

Instruction Manual PENETRATING PULSE TECHNOLOGY

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