Ultralab_UWS_Manual_.. - GENERAL ACOUSTICS Echosounding
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1. contact with liquids e Never operate the instument at sites where water may get into the UWS contoller housing e Also take care that the instument is always operated above the water line of experimental reservoirs Protect the UWS contoller housing against falling into water e Isolate all system devices from the mains before undertaking cleaning Ensure there is no current Do not use aggressive cleaning chemicals liquid cleaners or sprays only use a damp cloth Never bring this or any other cloth into contact with parts of the system that will subsequently conduct electicity e Never attempt to open instuments with objects or to insert objects into an instument The voltages existing in the instruments can lead to short circ uits and electric shocks e Ensure adequate ventilation when operating the ULRALAB UWS As the instrument has low power consumption it requires no additional ventilation under normal conditions However the instrument should never be placed on a source of heat computer monitors radiators Only operate the ULrALAB UWS at the intended mains voltage of 230 VAC optionally 110 VAC For safety reasons the ULTRALAB UWS is provided with a sealed appliance plug with earth contact for its mains power In this context only appliance cables and plugs with earth contacts may be used Operation of the system is prohibited if you do not have this option Never use an extension cable without an earth contact e T2. echoes higher transmitting power and amplification are typically required for greater measuring distances than for smaller measuring distances Using the TIDA function transmitting power and amplification can be optimized independently of the travel time of the ultrasound pulse The advantage lies in a reduction of delay time and reduced minimum measurable distance accordingly without diminishing the performance at greater distances The measurement range is divided into a maximum of 10 time intervals of various widths marked by supports A support is a location along the time axis assigned its own values for transmitting power and amplification The support at time 0 is specified by parameters P 03 and P 04 Amplification is linear during the time interval between supports 20 UWS User Manual ACOUSTICS The transmitting power remains constant during each time interval Following the last defined support its parameters are kept constant until the end of the measurement range In most cases it is sufficient to work with amplification control only and to keep the powerata constant level throughout the entire measurement range This has the advantage of faster measurements The delay time is automatically determined during TIDA and is adjusted as a function of the measured echo travel time It follows the echo at a time distance of twice the expected range P 08 The calculated delay time can never be smaller than the paramet
3. lt gt or lt gt another parametercan be selected After pressing P gt the value is displayed In case of manual selection of a parameter which is not implemented or not available at this position of menu than the menu jumpsto the next para meter automatic ally gt Parameter setting The displayed parameter value is adjustable by pressing lt or lt gt within its possible boundaries After entering this displayed value with the button lt P gt the menu jumpsto the next para meter selection which be seen on the display P xx gt Exitof programmable mode The programmable mode can be exited by the very last parameter with the number 99 P 99 After pressing lt P gt one is requested to enter the number 1 for saving of all the parameter changings or zero for not saving the changings The entering of the request shifts the operation mode backto measurement mode and the word End is displayed for some moments Please note e During operation in programmable mode all settings immediately become active The measurement operation still continues in background 12 UWS User Manual SACO The menu automatically shifts from programmable mode into measurement mode in case no button is pressed for a time longer than 16 seconds The display reminds the operator thatthe parameters were not saved by blinking the code F 09 In case the programmable mode is switched off without saving the parameter than the press of button lt P gt is
4. mm width height depth IP 50 Temperature 20 70 C range Scope of delivery Laboratory device UWS ultrasound sensor UWS 10 m sensor cable operating instuctions power cable 30 GENERALA UWS User Manual YACOUSTICS 8 CECompliance for Europe This device is compliant with requirements of the EU Guideline 89 336 EU and its modifications in 92 31 EU and 93 68 EU Article 5 regarding Electromagnetic Compatibility as well as 73 23 EU and its modifications in 93 68 EWG Article 13 regarding Safety 31 UWS User Manual 9 Contact GENERAL ACOUSTIC S GMBH Am Kiel Kanal 1 24106 Kiel Germany Phone 449 0 431 5 80 81 80 Fax 449 0 431 5 80 81 89 Email info genera la coustic s com Intemet www generalacousticscom GENERALA ACOUSTICS 32
5. near sensor signals must be securely within this delay time Any distant echoes amving during this time window will also be disregarded The minimum measurable distance can be calculated using Equation 1 Smin mm 1 2 v m s Taelay ms Taetay delay time Smin minimum measurable distance 17 GENERAL b ES UWS User Manual YACOUSTICS vi sound speed of fluid Note If an echo is persistently detected close to the near sensor measurement window limit independent of the measurement object the delay time should be increased Parameter P 06 Measurement Window 30 00 Measurement window in ms The measurement window should be set according to the maximum measuring distance Any excessively wide measurement window should be avoided Use Equation 2 to calculate the width of the measurement window Tww mS Smaxtm vi ms 2400 1 6 Fmax m in water Tuw measurement window Smax maximum measuring distance Sound speed of fluid Parameter P 07 Sound Speed 0250 8000 Sound velocity in m s The sound speed depends on the fluid to be measured and on its temperature Water for example hasa sound speed of 1483 m sat 20 C default Wert P 07 If the sound speed is unknown a simple experiment can be carried out to determine this value Set the following para meters P 07 1483 sound velocity 1483 m s P 10 0 wall travel time direct in water mea
6. values Parameters P11 and P 46 must be re calibrated afterwards 28 UWS User Manual ACO 7 Technical Specifications Miniature Echo Sounder ULTRALAB UWS Equipment types ULTRALAB UWS e Specification xM one measurement channel e Specification xM2 two measurement channels e Specification 1Mx 1MHz e Specification 2Mx 2 MHz Sensors e UWS2M 2MHz IP 68 M30x1 5 without temperature sensor e UWSI1M 1MHZ IP 68 M30x1 5 without temperature sensor Parameter e Via operating buttons digitally using display or settings e via serial interface optional e Code protected access Display Integrated 4 digit 12mm LCD display Measurement Adjustable max travel time 32 ms approx 23 m in water range Technical 1 of measurement range max 1mm r sonution atconstant ambient conditions Accuracy 4 digit 1mm to 9 999m measurement range Measurement max 10 Hz repetition rate Voltage output BNC socket 0 2 10 V data output with zoom function Switch outputs optional 2independentswitch outputs for limit values e lswitch output for enor signals max switch voltage 50 V optionally 250 V max switch current 5 A Interface optional serial RS 485 for data inquiry and parameter setting 29 UWS User Manual semi duplex operation max 32 devices bus Power supply 230 VAC 110 VAC optional 250 mA Housing approx 330 115 260
7. 3 UWS User Manual ACOUSTICS Emitting Fade away of emitting impulse mV impulse Multiple possibly Echo 200 Measurement window gt lt Dead time Trigger Fig 1 Signals at the output of the test socket seen by an oscilloscope e Delay the start of the time slot measurement window as long as all disturbing echoes can be located within the dead time 05 the value is been reduced it results in a movement of the signals on the oscilloscope towards left vice versa e The end of the measurement window P 06 should be configurated accordingly to the maximum measuring distance This time coordinate will be marked at the moment of maximum distance by the echo of the measuring object An unnecessarily long measurement window should be avoided 3 5 Processing of measurement value After initial adjustment of the echo sounder the parameter setting in respect to the measurement task has to follow Read the parameter setting chapter Basic operation e Echo detection sending pulse energy P 03 and or receiver amplification P04 e Measurement range in milli seconds ms P05 dead time 06 measurement window e Distance in meters P07 sound velocity 14 GENERAL UWS User Manual 5 Additional Para meters for Data Processing Fa ult suppression Distance calculation Volume calculation Use parameters P 08 expected range and P 09 fault suppression to co
8. Button lt gt Countdown 3 2 2 Programmable mode Button lt P gt Chose of parametertype enter of para meter settings Button lt gt Countup of para meter values Button lt gt Countdown of parameter values 3 3 Parameter setting gt Shiftto programmable mode By first pressing of the button lt P gt for longer than 2 seconds it switchs towards the programmable mode The word Code appearson the display after second pressing of the button P gt the number 0000 is displayed Then the code number is requested To activate the programmable mode enter the code number 0345 with the help 11 UWS User Manual RCOUSTICS of the other two buttons lt gt and lt gt Now the parameter mode is active and all valuescan be adjusted forfurther operation In case a wrong code number had been entered the display shows End and the programmable mode staysinactive With the help of button lt P gt one can shift within the menu from one parameter type to another The input of the code number is void if the previous programming process was terminated without storing the parameters By pressing the key lt P gt you go immediately again into the programming mode If you want the parameters to be protected from unauthorized access terminate the parameter setting storing the data press P99 Parameter selection menu The display shows P xx The number xx indicates the actual parameter selection By pressing
9. COUSTICS e If one ofthe instruments has fallen down or the chassis is damaged e If the instrument shows any noticeable departure from normal operation e Ifthe sensor connections have become wet With the exception of the actions explicitly specified in the manual you should never attempt your own repairs on devices belonging to the ULTRALAB UWS system Besides the resulting revocation of warranty coverage you also risk an electric shock or other injury from the components All maintenance work unless explicitly described in the manual should only be canied out by G A 1 2 Warnanty statement 1 Warranty period G A GmbH as manufacturer will itself or through its authorised sales partners provide end users with warranty coverage on all GENERAL ACOUSTICS products purchased as new and unused fora period of 12 months fro m the date of sale 2 G A procedure Any part which has been correctly used and is found to be defective as a result of manufacturing and or material faults within the above mentioned wamanty period will either be repaired or replaced with a new part by G A after expert opinion has been sought Material and orlabour costs arising asa result will not be charged All exchanged parts become the property of G A 3 Conditions for labour rendered under warranty Instruments delivered must have been operated correctly unauthorised modifications or repairs must not have taken place and the benchtop instument must
10. GENERAL ACOUSTICS Ultalab UWS User Manual 2007 GENERAL ACOUSTIC S GMBH GENERAL UWS User Manual YACOUSTICS User s notes UWS User Manual Table of Contents ACOUSTICS Page 1 General 4 1 1 Safety instructions 4 12 Warranty statement 6 2 Introduction 8 2 Abstract 8 2 2 System components 9 2 3 Principle of distance measurement 9 3 Initial operation 11 3 1 Operating modes 11 3 2 Operation system 11 3 2 1 Measurement mode 11 322 Programmable mode 11 3 3 Parameter setting 11 3 4 Operation 13 3 5 Processing of measurement value 14 4 Parameters of ULTRALAB UWS 16 5 Error Search 23 5 1 Error Search 23 5 2 Equipment Error 24 5 3 Warnings 26 6 Standard Values 28 7 Technical Specifications 29 8 CE Compliance for Europe 31 9 Contact 32 UWS User Manual ACOUSTICS 1 General 1 1 Safety instructions For your own safety and for the safe operation of the system please read the following instructions carefully PRIOR to operating the system forthe first time The ULTRALABO UWS laboratory instrument as well as the associated ultrasound sensors represent state of the art technology and comply with the latest safety regulations The manufacturer has made every effort to guarantee safe operation The user must ensure that the instrument is set up and installed in such a way that its safe usage isnot impaired The instrume
11. activating the programmable mode without entering the code number again This helps to shift quickly between measurementand programmable mode 3 4 Operation The ULTRALAB UWS instrument always has to be adjusted to the very specific measurement application Two basic settings are inevitable forthe measurement value logging 1 The ultrasound impuls is damped down in amplitude by passing through the fluid Therefore it has to amplified electronically after reception The emitting ultrasound energy and the echo amplification have to be adjusted carefully The sound pulse must penetrate the fluid and the target echo must be detected unambiguously by the receiver A parameter helps to adjust a time slot Within this time slot the first target echo will be analysed It is utterly necessary to chose a time slot which is beyond the sensors sending puls oscillation on one hand and beyond some disturbing echos right after the ultrasound pulse is sent on the other hand This delay up to the start of the time slot is called dead time All echos within the dead time will be ignored Proceedings Connectan oscilloscope with the test soc ket located at the front panel Try to obtain your maximum of target distance depending on your special application In case there are no echoes visible as depicted in Fig 1 increase the sending pulse energy P 03 and or the receiver amplification P04 until the ultrasound signals are clearly observable 1
12. arameter P 20 is not plausible Example Output of a volume unit on channel 2 where this works asa reference length or output of a sound travel time if the simulation of percentage measuring distance is activated ULTRALAB UWS cannot calculate the measurement value because the input 26 GENERALA UWS User Manual IncousTics container data do not take into consideration the measured distance The following causes are possible The calculated percentage value exceedsthe 500 limit The distance isgreaterthan the container diameter horizontal cylinder The measured distance exceeds the distance defined by the highest support free form container 27 UWS User Manual ACOUSTICS 6 Standard Values The equipment is shipped with the following default settings Param No Description Reset values P 02 Channel selection CH1 03 Transmitting power Level 1 P 04 Amplification Level 10 P 05 Delay time 0 2 ms P 06 Measurement window 30 ms P 07 Sound speed 1483 m s 08 Expected range 6 2 P 09 Fa ult suppression 0 55 21 Output interval 0 55 25 100 level 2 0m These default values are also activated upon a total reset You may trigger a total reset by pushing all three key buttons with the equipment tumed off then tuming the equipment on and keeping the key button pushed down until the display tums off Please note that the total reset also resets the calibration
13. empt to assist you whenever you need US 23 GENERAL UWS User Manual boue 5 2 Equipment Enor These are errors which interfere with or prevent any measurements If an error is detected an emor code appears on the display If several errors occur Simultaneously the most severe error will be displayed If the echo is lost the display shows no E the output voltage is displayed for faulty measurements and the equip ment error voltage is displayed for faulty measurements If both of them oc cur simultaneously the equipment error voltage is put out The displayed errorcode can be requested via the optional serial interface In a two channel ULTRALAB UWS the erorcode of the selected channel is displayed or output via the serial interface The output of eror messages requires for the ULTRALAB UWS device not to be stopped no E FOL F 02 F 03 F 04 F05 Sensorreceives no echo Possible causesinclude especially e Distance to measurement object greaterthan measurement range e Transmitting powerand oramplification too low e Starting gate and or measurement window set incorrectly e Sensorfailed and orcable broken e Rough fluid surface for a time period longer than programmed in fault suppression Checksum across program memory is incorrect This represents a severe error and the ULTRALAB UWS equipment would no longer work correctly causing the device to stop Please contact ourservice depar
14. er value of P 05 delay time At the testing output only the complex interaction of transmitting power amplification and delay time is evident During commissioning the initial determination is that for the required values for minimum and maximum measuring distance by using para meters PO3 P04 P05 then specifying the support parameters and programming accordingly This is followed by enabling the TIDA function and functioning checkup During TIDA operation there is an echo search for the entire measurement range in regular intervals This avoids the settling of the ULTRALAB UWS onto any faulty echo or multiple echoes In case the echo is lost due to faulty conditions the entire measurement range is cyclically searched forechoes until the error situation has been terminated We use an example to highlight the programming of the TIDA function Say the maximum measuring distance is 7 5 m Ata sound speed of 1500 m s a travel time of 10 ms results With TIDA tumed off a stable echo shows the following values Transmitting power 3 Amplification 35 A delay time of 0 5 ms was observed This corresponds to a minimum distance of 375 mm For smaller measuring distances the following settings may suffice for stable echoes Transmitting power 1 Amplification 10 The delay time is then reduced to 0 1 m conesponding to a minimum distance of 75 mm Finally an interim value shall be determined for the tansmitting power sw
15. ger exiss or has been diminished Please checkthe coupling and the setting of parameters P 71 through P 74 Determination of enor F 10 must be enabled by parameterP 70 The sensor provides a signal even though at the time no signal should be available The cause may be a defect in the sensororthe ULTRALABO UWS Please call ourservice department Determination of emorF 11 must be enabled by parameterP 70 The sensor does not deliver any signal The causes might be for example no sensor connected cable is broken or sensor electronics defective If checking of the cablesisunsuccessful please call ourservice department Temperature measurement has been enabled Parameter P 60 but no temperature signal is received by the ULTRALABO UWS Either there is no temperature sensor connected orit is defective The temperature sensor inside the sensor determines a temperature outside of the permissible range 20 C through 135 C Input data forthe travel time dependent amplification TIDA are not plausible A possible cause might be that the numbers do not steadily increase forthe time of permitted support spots P14 Please check also whether or not the number of permitted supports P12 is set correctly Input data for the containers are not plausible Please check the parameter values with the following possible causes in mind 25 UWS User Manual i e Standing cylinder Type 0 Dimension 1 dia meter is zero e Hori
16. he instumentis protected from mains voltage by a blowout fuse in the appliance plug A fine wire slow blow fuse G fuse 5 x 20 mm compliant with IEC with a nominal value of 0 5 A is to be used as a replacement Only the specified values may be used Higher tipping values or bridging of fuses is not pemnissible If the fuse repeatedly blows the Service Department of G A should be informed as the cause would need to be resolved e We recommend protecting the circuit with A protective switches to ensure safe operation of your complete system e Take care that power cables are not wom abraded or otherwise defective When routing connecting cables make certain that the cables do not represent an obstacle or risk of tipping e When using extension cables the total nominal curent of all the devices connected must not exceed the allowable maximum cunent of the cable The current ratings of all devices connected to a single plug should never exceed 15 A unless the plug is specifically designed for this purpose If you are unsure what type of mains power exists in your premises ask your Safety Officer or an authorised electrician Itis imperative to isolate instruments from the mains in the following cases If power cables or plugs are wom or damaged e If wateror any other liquid has found its way into one of the instuments e If the instument is not working correctly despite following the specified operating instructions UWS User Manual A
17. itching point At a measuring distance of 2 25 m travel time 3 ms the following settings are required Transmitting power 1 Amplification 20 The echo is equally stable at Transmitting power 3 Amplification 20 21 UWS User Manual r1 ACOUSTICS Travel Time Disance Transmitting Power Amplification 0 1 ms 75mm 1 10 3ms 2 25 m lor3 20 10 ms 75m 3 35 In the situation described 3 TIDA supports are necessary The detemined parameters are input asfollows P 03 Starting transmitting power P 04 Initial a mplific ation P 05 Dela y time P 13 Select first TIDA support P 14 Time of first TIDA support P 15 Transmitting power of first TIDA support P 16 Amplific ation of first TIDA support P 13 Select second TIDA support P 14 Time of second TIDA support P 15 Transmitting power of second TIDA support P 16 Amplification of second TIDA support 12 Enabling number of supports and TIDA Parameter P 21 Output Interval 0 100 2000 Output interval in s Level 1 Level 10 0 100 ms 1 3 000 ms Level 3 Level 20 2 10 00 ms Level 3 Level 35 2 The output interval specifies the time intervals at which the currently measured distance is output via voltage output and displa y Please note that the time sequence of data recording is essentially determined by Parameter P 09 fault suppression The output interval affects only the tempo
18. itting Power 0001 0009 Level of transmitting power 16 UWS User Manual ACOUSTICS Use this parameter to set the energy content of the transmitted ultrasound pulse The higher the transmitted power the higher the energy content of the transmitted ultrasound pulse In addition an increase in transmitting power increases the decay time of the transmitted signal The delay time start of measurement window may have to be increased under certain circumstances Parameter P 04 Amplification 0001 0067 Level of amplification The electronics amplify the reflected ultrasound pulse echo Use this parameter to set the level of amplification In an ideal case scenario this value is to be increased until an echo is detected by the measurement object An echo detection isindicated by a small arrow in the upper left comer of the display Each level increases the amplification by approx 1 dB The unit of dB represents a logarithmic relative measurement unit for example 20 dB corresponds to a factor of 10 and 6 dB to a factor of 2 The setting should preferably be done using an oscilloscope at the testing output at the equip ment s front panel Parameter P 05 Dela y Time 20 00 Dela y time in ms The decaying transmitted signal as well as possible reflections of the ultrasound transmission pulse in the immediate vicinity of the sensor mounting brackets container walls etc must be removed All undesirable
19. not have been opened 4 No warranty claim exists in the following cases Parts subject to normal wear Damage caused by incorrect maintenance fitting and addition of non approved parts and devices as wellas unauthorised modification of components Damage caused by electrolysis Damage caused by fire oraccident incorrect usage misuse ornegligence Damage rust comosion caused by the entry of water Explicit ortacit guarantees GENERALA UWS User Manual VACOUSTICS These guarantees confer special rights to you and you may also have other rights which differ from country to country or from province to province Where these guarantee claims apply all other explicit or tacit guarantees provided by GENERAL ACOUSTICS automatically lose their validity incl all market access guarantees or guarantees of fitness for every specific purpose Conversely the guaranteesthus arising are limited to the period of this warranty Neither sales partners nor traders are authorised to make any other assurances representation of facts or warranty offersthan those contained in the warranty conditions GENERAL ho UWS User Manual YACOUSTICS 2 Introduction 2 1 Abstract The miniature echo sounder UltraLab UWS works with an ultrasonic impulse travel time procedure It was developed for highly time and position resolved measurements of distances in fluids With optional sensors measurements through container walls are also possible Measurement
20. ntrol the behavior of ULIRALAB UWS during unfavorable acoustic conditions Use the sound speed P 07 to convert the echo travel time to distance in meters Use parameterP 25 max distance in meters If data output proportional to distance suffices enter in P 25 the maximum distance in meters asthe 100 distance 15 UWS User Manual A ACDUST 4 Parameters of ULTRALABO UWS Param Spec Spec Description Settings No xM xM2 CODE y x Accesscode for programming mode 0345 P 02 X Channel selector CH1 CH2 P 03 X X Transmitting power 1 9steps P 04 X X Amplification 1 67 steps P 05 Dela y time 0 001 20 ms P 06 x x Measurement window 0 001 30 ms P 07 x x Sound speed 250 8 000 m s P 08 x x Expected range 0 8 100 P 09 x Fa ult suppression 0 1 2 000 s 21 x x Output interval 0 1 2 000 s 25 x x 100 distance 0 001 40m Parameter P 02 Channel Selector This parameter exists only in devices with 2 measurement channels specific ation xM2 Use this parameter to select the measurement channel in programming mode All additional input of parameters refers to the selected channel accordingly Switch to Channel 1 Keys lt gt gt CH1 gt P gt Switch to Channel 2 Keys lt gt gt CH2 gt lt P gt The channel may also be selected in measurement mode prior to switching on the programming mode Para meter P 03 Transm
21. nts are factory tested and were delivered in a safe operational condition This User Manual contains information and wamings which must be observed by the user under all circumstances to ensure safe operation of the instruments e The instument may only be put into operation by authorised persons and only operated by tained personnel All users working with this instrument must read the User Manual prior to any operation e The user may only perform the repair and maintenance work described Only the specified parts are to be used Servicing work may only be canied out by authorised service technicians from G A e All instuments and additional devices used for this purpose must be properly earthed e The earth leads must not be intenupted atany point The ULTRALABO UWS laboratory instrument may only be operated within the specified temperature range of 20 to 70 C Otherwise measurement inaccuracies and instrument faults or defects may occur The temperature stability of connection cables must match the operating temperature of the measurement system e The sensor should only be connected to the instument when it is switched off e The sensors are to be treated with care and are only to be screwed in hand tight otherwise there is the risk of damage Sufficient leverage is obtained from the sensor casing itself e Avoid electrostatic discharges UWS User Manual ACO e The ULTRALAB UWS controller housing must not come into
22. objects may be the bottom a target within the fluid or the surface of the fluid In respect to its special property of the directly proportional distance voltage value the import of the analogue output signal into an extemal data acquisition system is facilitated This means for example that the output 0 10 voltage signal is proportional to the water depth 0 10 meters 5 volts are equal to 5 meters The easy to use laboratory measuring instrument UltraLab UWS is distinguished by its various functions and configurations which enables its use for complex measuring tasks e A complex measuring algorithm ensures a high accuracy and resolution as well as a high data security e The measured distance is directly shown on a four digit display e According analogue voltage value is sent out through a BNC socket at the front of equipment The measured range aswell asthe output voltage can be adapted to the requirements of the overall measuring system e An optimal adaptation to the measuring task is possible due to adjustable measuring parameters The parameter setting can be permanently stored e The Ultralab UWS is able to simulate various measuring states which facilitates the initiation as well asthe integration of the equipment to the clients measuring system UWS User Manual CO 2 2 System components The measurement device ULTRALABBUWS consists of the following components gt Controller ULTRALABO UWS gt Ul
23. ral behavior ofthe output ParameterP 25 100 Distance 0 001 40 00 Distance at 100 in m 22 GENERAL UWS User Manual WACOUSTICS 5 EnorSearch 5 1 Error Search In case the ULTRALAB UWS unexpectedly does not display the correct value for measured distances the following items should be checked systematically The initial check is whether electrical or acoustic al problems might be the cause Please check the following items Doesthe ULTRALAB UWS have an operating voltage of 230V AC optionally 110V AC Isthe equipment fuse OK Isthe sensor connected properly Isthe sensor area covered thoroughly with contact medium Isthe sensor mounted vertically and aligned toward the sound reflection surface Is fluid inside the container Isthe delay time set properly Do non permitted reflections from the container wall enter the measurement window Are installations interfering with the sound path Are there too many foreign particles or bubbles inside the fluid Isthere excessive turbulence Are transmitting power and or amplification set too low Did the medium change during the operation Did the temperature orthe concentration of the medium change significantly If the ULTRALAB UWS reports an equipment problem a comesponding message is displayed The analysis differentiates between errors and wamings which are explained in the following sections Please call us with any problem We will make every att
24. surement P 20 0 displa y output in units m P 26 0 installation height 0 m 18 GENERALA UWS User Manual iia Position the sensor at a defined distance from the measurement object within the planned measurement environment Measure the distance between the sensor surface and the measurement object as accurately as possible using an altemative method such as a steel measuring tape Terminate the programming mode and read the distance in m off the display Using the following equation this value can be used to determine the correct sound speed v1 m s Smeas m Sdisp m 1483 m s vi calculated sound speed of fluid Smeas distance measured with altemative method Siipi distance value shown on display Parameter P 08 Expected Range 0 8 100 0 Expected range in of the actually measured distance value The measurement values are determined by ULTRALAB UWS The mean value is calculated only from those values which fall within the expected range The expected range is re calculated after each measuring cycle and is updated for the current mean value calculation For high signal to noise ratios the expected range should be programmed assmall as possible This increases the accuracy of the output data the most The expected range should be increased if error message occurs more frequently Example Parameter P 08 at ULTRALAB UWS is set to level 6 2 Measurements are taken of waves wi
25. th steep flanks Here it is possible for the initial echo to be deflected and not detected but instead to detect a multiple reflection at a much later time Due to the expected range of 6 2 centered about the most recently calculated mean value this measurement is rejected during the averaging process The data output is completely unaffected by faulty measurements 19 UWS User Manual is Parameter P 09 Fault Suppression 0 100 2000 Fault suppression time in s The set time specifies the time period during which the ULTRALAB UWS collects measurements and tolerates faulty measurements respectively before switching to an enor message Display no E This parameter should be programmed for the smallest possible values during favorable measuring conditions Exa mple In a flow channel there are regularly interferences with measurements due to air bubble inclusions The time window during which no measurements are possible is always approx 6 s Recommended setting P 9 10 s This means that the correct value is upheld up to a maximum of 10 s throughout the time period when air bubbles occur and no measurements are possible As soon as the fault condition subsides the device switches back to the regular measuring mode Notes on travel time dependent amplification TIDA The propagation of ultrasound within the fluid is accompanied by a dampening of the ultrasound pulse intensity Fora clear detection of unique
26. tment Checksum across the non volatile program memory is incorrect You may initial a total reset by pushing the selection key causing the equipment to restart Please contact ourservice in orderto perform repairsto faulty modules Equipment software is non compatible with equipment hardware Please contact ourservice department Equipment software contains the wrong software version Please contact our service department Main memory inside the equipment is defective Since parameter values can no longer be considered safe all measurements are stopped and the equipment is halted Please contact ourservice department for consultation 24 F 06 F 07 F 08 F 10 F11 F12 F 22 F31 F 32 NERALA UWS User Manual JHCOUSTICS The intemal work memory of the micro computer is defective The device is halted Please contact our service department A difference wasfound between the working parameter set and the contents of the non volatile parameter memory Please check all parameters for accuracy and save again If the error reoccur there is an enor in the computer hardware Please contact ourservice department The control technology for the sensor does not work correctly Please check for proper wiring of the sensor Furthermore it is possible that the fuse for the respective channel has been triggered 0 5A T Please call our service department for repairs The acoustic coupling of the sensor no lon
27. trasound sensor 1M gt 10 m length sensor cable between sensor and contoller Sensor identific ation Frequency Temperature Fixing gauge 1M 1MHz no Screw thread M30x1 5 2 3 Principle of distance measurement ULTRALAB UWS emits an acoustic sound Its impulse gets launched directly or indirectly through a container wall into the fluid The transmitted ultrasound impulse is reflected at any object serving asa target This acoustic reflection echo propagates in the medium and is received by the ultra sound sensor In orderto measure the effective distance between target and sensorthe travel time between the sensor and the target and back to the sensor again This sound travel time is measured by the ULTRALABO UWS device The measured travel time will be corrected intemally in the controller e g the tra vel time of the sound penetrating a container wall will be subtracted Due to multiple reflection of the sound within the container wall it is not recommended to measure the echo right after the sound was emitted There hasto be some dead time in order to measure real targets and not just a multiple sound within the container wall Those wall echoes are suppressed by the setting of a certain dead time which ignores all echoes within that time frame That s why distances can not be measured from zero GENERAL h UWS User Manual ACOUSTIC The measured travel time will be averaged Next to such averaged val
28. uesa tolerance buffer expectation can be set Only measured values which lie within this band of expectation will be accepted Is the distance to the target changing it quickly changes the average values and the band of expectation respectively The distance to the target in meters can be calculated by the travel time and the sound velocity within the measured fluid The sound velocity depends on the kind of fluid its concentration and temperature Therefore it is possible to set one special parameter which is responsible for the sound velocity of the fluid medium A calibration of the travel time will be done intemally For adjustment to your measurement setup you can also adjust in which time intervals the results are delivered That concems the actualization of the measured values on the display and the voltage output 5 10 UWS User Manual ACOUSTICS 3 Initial operation Please checkthe correct contact fitting of the sensorbefore powerswich on 3 1 Operating modes After power swich on the device works in regular mode of measurement Parameter setting and requising only can be don in programmable mode To swich from regular to programmable mode use the three push buttons at the front panel 3 2 Operation system The three push buttons at the front panel have different fuctions in respectto active operation mode 3 2 1 Measurement mode Button lt P gt programmable mode Button lt gt Countup
29. zontal cylinder Type 1 Dimension 1 length and or dimension 2 dia meter are zero It is also possible that the 100 distance is greater than the conta iner diameter e Rectangular tank Type 2 Dimension 1 length and or dimension 2 width are zero e Free form container Type 3 Distance does not steadily increase from one support to the next identical values are also not permitted e The last valid support specified by parameter P 27 contains a volume number of lessthan 10096 5 3 Wamings Wamings inform you of non optimal measurement processes and are caused by unfavorable parameter settings The measurement result is not affected The waming code can be inquired via the optional serial interface F 09 F21 F 30 F 33 F 34 Parameters not saved permanently You exited the programming code with P 99 0 or the ULTRALAB UWS switched on its own from programming mode to measurement mode after no keys had been operated and no serial command had been received forapprox 16 minutes Waming F 09 isdisplayed periodically fora brief moment i e flashing You selected temperature asthe display output Para meter P 20 but temperature measurement has not been enabled Parameter P60 Overflow or underflow of the number range The numberto be displayed cannot be displayed using the 4 digit display Set the next higher lower volume unit or selecta different unit Parameter P 20 The unit set by p
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