710 Ultrasonic Module User Manual
Contents
1. 15 18 21 24 27 30 48 inches Parshall Flume 1 2 3 6 9 inches 1 1 5 2 3 4 5 6 8 10 12 feet Trapezoidal Flume Large 60 degree V 2 inch 45 degree WSC 12 inch 45 degree SRCRC H Flume 0 5 0 75 1 1 5 2 2 5 3 4 5 feet Equation Q axHP x Hd Q flow H head 8 b c amp d entered values Data Points User developed tables for level to flow 3 to 50 data points Manning Equation Round Pipe Slope Roughness Diameter U Channel Pipe Slope Roughness width Rectangular Pipe Slope Roughness Width Trapezoidal Slope Roughness Bottom Width Top Width 1 7 710 Ultrasonic Module Section 1 Installation and Programming 1 3 1 User Determined Mounting Location 1 3 2 Dead Band If you intend to measure flow by some other means such as a gravity flow equation Manning or by calibrating a section of the flow channel you will have to determine the location for the ultrasonic level sensor You should base this location on the hydraulic characteristics of the site and the method of level to flow rate conversion used Mount the ultrasonic level sensor as close to the maximum expected level as possible This minimizes many of the unde sirable characteristics of ultrasonic distance measurement However you must mount the ultrasonic level sensor at least one foot higher than the maximum expected level This is a result of the one foot dead band directly2. Phone 800 228 4373 USA Canada Mexico 402 464 0231 Outside North America Fax 402 465 3022 Email IscoCSR teledyne com Technical Support Phone Toll Free 866 298 6174 Samplers and Flow Meters Toll Free 800 775 2965 Syringe Pumps and Liquid Chromatography Email IscoService teledyne com Return equipment to 4700 Superior Street Lincoln NE 68504 1398 Other Correspondence Mail to P O Box 82531 Lincoln NE 68501 2531 Email Iscolnfo teledyne com Revised September 2012 General Warnings Hazard Severity Levels 710 Ultrasonic Module Safety This product is often installed in confined spaces Some examples of confined spaces are manholes pipelines digesters and storage tanks These spaces may become hazardous environments that can prove fatal for those unprepared These spaces are governed by OSHA 1910 146 and require a permit before entering This manual applies Hazard Severity Levels to the safety alerts These three levels are described in the sample alerts below CAUTION Cautions identify a potential hazard which if not avoided may result in minor or moderate injury This category can also warn you of unsafe practices or conditions that may cause property damage Warnings identify a potentially hazardous condition which if not avoided could result in death or serious injury DANGER limited to the most extreme situations to identify an imminent hazard which if not avoided will result
3. it may be said that they are proportional errors in that the error increases as the distance between the ultrasonic level sensor and the liquid surface increases Echo detect errors come from the problems the module may have measuring the time between transmitting the ultrasonic pulse and receiving the echo Anything that can absorb or misdirect sound causes these errors This makes the echo amplifier detect the returned signal either later or earlier than intended by the design of the ramp gain amplifier These errors will generally be of an absolute nature they will not be affected to any extent by the distance between the transducer and the water The module must only respond to surfaces within a specific area The transducer can only see items inside a cone whose apex point is the ultrasonic transducer The beam angle is the angle across this cone If the beam angle is too wide the module will detect unwanted surfaces such as the walls of the channel If the beam angle is too narrow setup of the installation is difficult and the module may never detect an echo The transducer has a beam angle of 10 Background noise can interfere with the operation of the module The noise must be filtered out or the module may trigger on noise rather than the echo The module uses a tuned circuit to filter unwanted noise outside the system s frequency range around 40 kHz Software algorithms eliminate most sporadic noise pulses occurring
4. IN MINUTES 1 2 5 Continue with sampler programming sequence see sampler manual gt Figure 1 2 6712 Programming 710 Module Screens 1 4 MODE OF OPERATION FLOWMETER LEVEL ONLY WEIR FLUME DATA POINTS EQUATION MANNING Module Setup Section 1 V NOTCH RECTANGULAR CIPOLLETTI EDIT DATA POINTS CLEAR DATA SET SELECT NEW SET CHANGE NAME Flume PALMER BOWLUS PARSHALL TRAPEZOIDAL H Manning Continue ROUND PIPE U CHANNEL RECTANGULAR CHANNEL TRAPEZOIDAL CHANNEL PLEASE WAIT SORTING DATA CLEAR DATA SET ARE YOU SURE YES NO DATA SET 1 DATA SET 2 DATA SET 3 DATA SET 4 DATA SET ABCDEFGHIJKLMNOPQRST UVWXYZ amp 0123456789 BACKUP DONE SLOPE ROUGHNESS DIAMETER SLOPE ROUGHNESS _ ___ TOP WIDTH SLOPE _ ROUGHNESS TOP WIDTH _ Figure 1 3 6712 Programming 710 Module Setup Screens 710 Ultrasonic Module Installation and Programming V NOTCH WEIR ANGLE 120 90 60 45 30 22 5 END CONTRACTIONS ON RECTANGULAR WEIR YES NO ENTER CREST LENGTH a JUL min max PALMER BOWLUS SIZE 4 6 8 10 12 15 18 24 24 27 30 48 PARSHALL SIZE 1 2 3 6 9 1 1 5 2 3 4 5 6 8 10 12 TRAPEZOIDAL SIZE 2 45 WSC 12 45 SRCRC LG 60 V H FLUME SIZE 0 5 0 75 1 0 2 0 2 5 3 0 4 5 INVALID ENTRY DUPLICATE DEPTH SAVE CHANGES Y
5. and Programming This screen appears only when a module has been changed or if the module was unplugged while MODULE INSERTED DOWNLOAD DATA NOW OR LOSE ALL DATA the sampler was powered DONE Standard 6712 SAMPLER STANDARD PROGRAMMING for HELP at any screen press key RUN PROGRAM Extended 6712 SAMPLER EXTENDED PROGRAMMING for HELP at any screen press key RUN EXTENDED 1 PROGRAM VIEW REPORT OTHER FUNCTIONS VIEW REPORT OTHER FUNCTIONS SITE DESCRIPTION PROGRAM NAME See FACTORY EXTENDED 1 sampler CHANGE CHANGE manual YES NO YES NO SELECTED UNITS FOR LENGTH ft m SELECT UNITS FOR FLOW RATE cfs gps gpm Mgd Ips m3s m3h med Note To program the module or run a program that requires a module you must plug in the module before turning on the 6712 controller SELECT UNITS FOR PROGRAM MODULE FLOW VOLUME YES NO cf gal Mgal m3 lit v See Figure 1 3 Module Setup If applicable This screen appears only when a selection is changed NEW MODULE SETUP DOWNLOAD DATA NOW OR LOSE ALL DATA DONE CURRENT LEVEL IS aot fit ft ARE YOU SURE ADJUST LEVEL TO YES NO ft If applicable This screen appears only when the adjustment differs from the current reading by more than 0 5 ft If applicable This screen appears only when the interval is changed INTERVAL CHANGED DOWNLOAD DATA NOW OR LOSE ALL DATA 10 15 30 DONE DATA STORAGE INTERVAL
6. echo In severe cases it is pos sible for the module to lose the echo completely Although the ultrasonic level sensor cannot be mounted closer than twelve inches from the maximum level of the flow stream it is recommended that the mounting be kept as close to the twelve inch limit as possible The reason is that any error made by the module in calculating the velocity of sound in the air is multi plied by the distance from the level sensor to the surface of the flow stream Minimizing the distance will minimize the error 2 5 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor 2 4 4 Calibration Temperature 2 4 5 Water Condensation 2 4 6 Foam Oil and Turbulence Calibrate the level reading under temperature conditions as near as possible to those expected during operation If the sensor has been moved through various temperatures before installation you should allow it to stabilize before calibration For small changes of level the error due to temperature is deter mined by the product of distance and temperature change Cali brating at the same temperature as the operating temperature will minimize this error The ultrasonic level sensor will not operate properly if water con denses on the transducer surface as a result of high ambient humidity Some users have found that mounting the transducer horizontally and aiming it at a 45 angle reflector will keep water from collecting on the transducer s radiating s
7. within the module s operating frequency range CAUTION Tests have shown that the 710 Module is affected by RF sig nals such as those from radio and TV station towers located nearby If water levels on the sampler s display are changing sporadically but the water level is stable the instrument will have to be relocated away from the RF sources Walkie talk ies or cell phones should not be operated within 3 meters 10 feet of the sampler for the same reason Objects or foam floating on the surface of the flow stream can absorb or weaken the ultrasonic pulses If the pulses are reduced enough there will be no echo 2 3 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor 2 4 2 3 6 Temperature 2 3 7 Waves 2 3 8 Wavelength 2 3 9 Wind 2 3 10 Other Factors Temperature changes have a significant effect on the velocity of sound approximately 7 between 32 and 104 F Consequently the module provides temperature compensation There is a tem perature sensor embedded in the housing of the ultrasonic level sensor Waves on the surface of the flow stream can deflect the sound energy so it does not return to the transducer Waves can also cause the sound to return to the transducer by an indirect path In the first case the module will not receive an echo in the second case the additional time lapse will cause an echo error indicated by an incorrect level reading The module employs a software algorithm to rej
8. 0 0 cece eee 2 1 2 2 3 Return Echo Amplifier Compensation lesse 2 1 2 3 Error Factors and Module Compensation 00 00 e eee eee eee 2 3 2 9 Ly Velocity EXFOES tido a ee ala ioe de geese 2 3 2 3 2 Echo Detect Errors coi as 2 3 273 3 Beam ngle cese esae LEARN En ee ei ana 2 3 2 9 4 Noise ae ie in a a el 2 3 2 3 5 Surface Objects ooooooooroorrrrr ern 2 3 2 9 6 Temperature 4 452 Kean een 2 4 2 3 1 WAVES nn Rs er re 2 4 2 3 8 Wavele ptli cia ee BL ie el 2 4 2 39 9 Wind cent 2 4 2 3 10 Other Factors ses seed eek a near A bean Baal 2 4 2 4 Minimizing Level Measurement Errors lees 2 5 2 4 1 Temperature Differences 0 ccc eee eee tenes 2 5 24 2 Avoid Wind 4 iSong Sho eem Y ede SG ede A 2 5 2 4 3 Excessive Distances ss i uci oeste eigen RE DIR TRAC Ree ee 2 5 2 4 4 Calibration Temperature 0 ccc eee eee 2 6 2 4 5 Water Condensation else rn 2 6 2 4 6 Foam Oil and Turbulence 0 eee eee 2 6 2 4 7 Small Pipes and Channels 0 0 cece eee eee eee 2 7 2 4 8 Alternative Flow Measurement Systems 0 000 c ee eee eee 2 8 Appendix A Accessories vii 710 Ultrasonic Module Table of Contents viii List of Figures 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 2 1 2 2 2 3 710 Module Installed on Sampler 0 cece eee eens 1 2 6712 Programming 710 Module Screens 00 cee eee eens 1 4 6712 Progra
9. 710 Ultrasonic Module Installation and Operation Guide 2g TELEDYNE ISCO Everywhereyoulook Part 60 9003 062 Copyright O 1995 2003 All rights reserved Isco Inc Revision G October 2013 Foreword This instruction manual is designed to help you gain a thorough understanding of the operation of the equipment Teledyne Isco recommends that you read this manual completely before placing the equipment in service Although Teledyne Isco designs reliability into all equipment there is always the possibility of a malfunction This manual may help in diagnosing and repairing the malfunction If a problem persists call or e mail the Teledyne Isco Technical Service Department for assistance Simple difficulties can often be diagnosed over the phone If it is necessary to return the equipment to the factory for service please follow the shipping instructions provided by the Customer Service Department including the use of the Return Authorization Number specified Be sure to include a note describing the malfunction This will aid in the prompt repair and return of the equipment Teledyne Isco welcomes suggestions that would improve the information presented in this manual or enhance the operation of the equipment itself Teledyne Isco is continually improving its products and reserves the right to change product specifications replacement parts schematics and instructions without notice Contact Information Customer Service
10. 9 C Storage Temperature 0 to 140 F 18 to 60 C Module Enclosure NEMA 4X and 6 IP67 Transducer Enclosure Totally encapsulated NEMA 4X and 6 IP67 Power Provided by the sampler Memory Nonvolatile programmable Flash Can be field updated through the sampler Readings Programmable through sampler at 1 2 5 10 15 and 30 minute intervals Level Resolution 0 013 ft 0 4 cm per count of digital timer Level Measurement Accuracy A change of less than 1 foot 30 5 cm 0 02 ft 0 6 cm at 72 F 22 C A change of 1 to 10 feet 30 5 to 305 cm 0 04 ft 1 2 cm at 72 F 22 C The change is relative to the calibration level Maximum Error Due to 0 000085 x Distance to liquid surface per C Temperature 0 000047 x Distance to liquid surface per F Beam Angle 10 degrees Range Minimum 1 foot 30 5 cm from sensor to liquid at maximum level Maximum 11 feet 335 cm from sensor to liquid at minimum level All weights may vary by 0 2 Ib 0 1 kg All lengths may vary by 0 25 inch 0 64 cm 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor 2 1 Description 2 2 Transducer Operation 2 2 1 Validity Tests 2 2 2 Ambient Air Temperature Factor 2 2 3 Return Echo Amplifier Compensation The ultrasonic level sensor mounts directly over the flow stream The module measures level by transmitting an ultrasonic pulse toward the liquid s
11. ES NO 1 5 710 Ultrasonic Module Section 1 Installation and Programming MODULE INSERTED This screen appears only when a module has been DOWNLOAD DATA NOW changed or if the module was unplugged while OR LOSE ALL DATA the sampler was powered DONE Standard Extended 6712 SAMPLER 6712 SAMPLER Note STANDARD PROGRAMMING EXTENDED PROGRAMMING FOR HELP AT ANY FOR HELP AT ANY To program the module or SCREEN PRESS KEY SCREEN PRESS KEY run a program that requires a module you must plug in the module before turning RUN RUN EXTENDED 1 Rocca PROGRAM on the 6712 controller VIEW REPORT VIEW REPORT OTHER FUNCTIONS OTHER FUNCTIONS PROGRAM NAME Pm SITE DESCRIPTION EXTENDED 1 a p FACTORY SITE DESCRIPTION EAE manual FACTORY UNITS SELECTED SELECTED UNITS FOR LENGTH ft LENGTH ft m SELECT UNITS FOR FLOW RATE cfs gps gpm Mgd Ips m3s m3h m3d UNITS SELECTED FLOW RATE cfs FLOW VOLUME Mgal SELECT UNITS FOR FLOW VOLUME cf gal Mgal m3 lit ULTRASONIC MODULE WEIR 90 See Figure 1 3 Module Setup V NOTCH CURRENT LEVEL IS ft CURRENT LEVEL IS umm d ARE YOU SURE ft ADJUST LEVEL TO YES NO ft DATA STORAGE _ MINUTE INTERVAL IN MINUTES DATA INTERVAL 1 2 5 10 15 30 Continue with the sampler programming sequence see sampler manual Figure 1 4 6712 Programming 710 Quick View Screens 1 6 710 Ultrasonic Module Section 1 Installation and Prog
12. EVEL menu press the key before entering the numerical value 5 Set up the sampler See details in the sampler manual 6 Run the program You should install the module before turning the controller on When the controller is turned on it looks for a module The con troller will not recognize a newly installed module if it is not seen during this power up routine If you install a module while the controller is already on turn the controller off and then on again to reconfigure the controller for use with the module When the controller is configured with the module it adds the necessary screens for programming The screens appear on the following pages in Figures 1 2 1 3 and 1 4 These figures outline 1 2 1 Programmed Enable 710 Ultrasonic Module Section 1 Installation and Programming the steps for module programming and calibration For 6712 pro gramming and general programming information see the sampler manual An asterisk appears next to a reading if the module was unable to take a reading If an asterisk appears the reading dis played is the last available reading When a 710 Module is installed additional sampler enable options are available If programmed for LEVEL ONLY the additional option is LEVEL If programmed for FLOW METER the additional options will be LEVEL and FLOW For more infor mation about programmed enables see the sampler manual 1 3 710 Ultrasonic Module Section 1 Installation
13. PERATURE Tc is the tem perature at the level sensor at the time the sys tem is calibrated Not shown on the drawing TEMPERATURE CHANGE chg is the change in the temperature after the head was calibrated chg T Tc Note that the temperature is used to calculate the distance D to the liquid surface and the head Any error in the temperature T causes an error that is proportional to the dis tance D Figure 1 6 Level Change Temperature and Calibration Factors 1 9 710 Ultrasonic Module Section 1 Installation and Programming 1 3 3 Accidental Submersion 1 4 Mounting the Sensor 1 4 1 UseaLevel 1 4 2 Remove the Protector Cap Since both ends of the ultrasonic level sensor are completely sealed temporary submersion in the flow stream should not cause any harm However you should avoid prolonged sub mersion There are many ways to suspend or mount the ultrasonic level sensor over the flow stream Some are shown in Figures 1 7 and 1 8 in this manual Mounting hardware is listed in Appendix A Select the method that best suits your application In stable indoor environments you can simply suspend the ultrasonic level sensor from its cable A Cable Straightener which forces the ultrasonic level sensor to hang plumb is available to help in this mounting method When you mount the ultrasonic level sensor place it over the center of the flow stream and use a circular bubble level to align it ver
14. below the level sensor where no measurements can be taken Ultrasonic Sensor Deadband 1 foot Maximum range 11 feet Figure 1 5 Ultrasonic Level Sensor Dead Band M Note Do not mount the sensor over turbulent flow such as round pipe openings in manholes where the flow may exceed one half of full pipe Turbulence occurs at the transition between each round pipe opening and the U channel Under these con ditions you must place the sensor over the least turbulent flow This is usually the midpoint of the length of the U chan nel 710 Ultrasonic Module Section 1 Installation and Programming ULTRASONIC TRANSDUCER amp TEMPERATURE SENSOR i U I DB DEADBAND 1 FT MIN PRADA KO oA GR UA RADA LS ANAL US LA UU Ha p DISTANCE De DISTANCE pu CALIBRATION KAALAAAAAAAAA S S S d H HcoHa H He NP NP NP NP NP NP NP SP NP NP ND NP NP NP NP Hc Dz De DISTANCE LEVEL AT ZERO CALIBRATION Hmax H MAXIMUM LEVEL LEVEL Hz ZERO DWG 60 9002 073 Y Y Y Y LEVEL DEAD BAND The non usable distance 1 foot between the level sensor and the liquid surface this requires that at maximum level the liquid surface be at least 1 foot from the level sensor DISTANCE D is the distance from the level sen sor to the liquid surface For the module this dis tance can be from 1 to 11 feet Dc is the distance from the level sensor to the liquid surface at the time the le
15. ect occasional readings that deviate sub stantially from normal However if the waves are severe the module will not function and will indicate a no echo condition You can determine the wavelength of sound by dividing the velocity of the sound by the frequency The frequency of the module is about 40 kHz The length of a 40 kHz sound wave is found by dividing 1 125 by 40 000 which is 0 02813 feet or 0 3375 inches Under ideal conditions it is possible to detect the same wave front of the returning echo However any noise or abnormal attenuation excessive decrease may cause the module to detect an earlier or a later wave When the attenuation of the returned echo does not match the gain slope of the amplifier the circuit will eventually detect a different cycle of the returned echo as the distance changes The impact of this wave detect error is deter mined by the wavelength Higher frequencies shorter wave lengths produce smaller echo detect errors However higher frequencies are absorbed more rapidly decreasing the maximum distance that you can measure with the same amount of power The frequency of 40 kHz was selected for the module as a suitable compromise Since the sound travels the distance twice going and coming the observed error is one half of the wavelength or 0 014 foot The module uses a rectified detect circuit that can detect either the positive or negative peak This allows the module to limit the error of p
16. efahr f r Finger und H nde wenn diese zwischen die beweglichen Teile des gekennzeichneten Ger tes geraten 710 Ultrasonic Module Table of Contents Section 1 Installation and Programming 1 1 Introduction ea oso a A ne ee cau cd Bat lee abs ese 1 1 1 1 1 Installing th Module mento ba RR RR Chee ae eed Bee a 1 1 1 1 2 Installation Checklist 2 2 0 0 0 cece een eee 1 2 1 2 Programming Notes id A Cee band eh OR oe She qu a beat 1 2 1 2 1 Programmed Enable 0 cece cece eee ene nee 1 3 1 3 Mounting the Ultrasonic Level Sensor 0 0 0 cece eee eee eee 1 7 1 3 1 User Determined Mounting Location 0 000 cece eee eee 1 8 1 32 Dead Band suos ue asccese nen 1 8 1 3 3 Accidental Submersion 000 cece teen eens 1 10 1 4 Mounting the Sensor een Rade her e Rs 1 10 1 4 1 Usea Level is di a acta de qus 1 10 1 4 2 Remove the Protector Cap 0 cece eee eee eens 1 10 1 5 Maintenance en la an 1 13 1 6 How to Get Help red rer RR ae eames hee ee es 1 13 1 7 Flash Memory and Software Upgrades 222222 cece cece e tenes 1 13 1 8 Technical Specifications 0 0 0 ccc tent ee 1 14 Section 2 The Ultrasonic Level Sensor 2 1 Description nennen a Pee eRe REX CE Se ERE 2 1 2 2 Transducer Operation 0 0 0 0 c cc etn tent eee n eee 2 1 2 2 1 Validity Tests 22 822 daw hee SE ee Bari Pe ees 2 1 2 2 2 Ambient Air Temperature Factor
17. for the module The module applies these readings to the level measurement calculation If the temper ature sensor does not provide an accurate reading not only is the usefulness of temperature compensation defeated but also a measurement error will be multiplied by the distance the pulse must travel When the module receives inaccurate temperature readings level errors can be as great as 0 001 per foot for each degree of temperature difference For example with a distance of only two feet and a temperature difference of 35 F the level error is Level Error 0 001 x 35 x 2 0 070 foot about 1 inch Sunlight is a common factor that may cause the sensor to misrep resent the ambient air temperature Direct sunlight will warm the sensor housing to a temperature greater than the sur rounding air Other factors include temperature inversions and layers of air at different temperatures throughout the distance the pulse must travel Inversions or layers can also cause an abnormal reduction in the strength of the ultrasonic pulse If the ultrasonic level sensor is installed outside and directly exposed to the sun a sunshade should be installed See the Accessories section in this manual for ordering information The ultrasonic level sensor should be installed in a location pro tected from air currents Wind reduces the strength of the ultra sonic pulse and echo This causes the module to have difficulty detecting the proper wave in the
18. hout returning the instrument to the factory Instruments needing factory repair should be packed carefully and shipped to the attention of the service department Small non fragile items can be sent by insured parcel post PLEASE BE SURE TO ENCLOSE A NOTE EXPLAINING THE PROBLEM Shipping Address Teledyne Isco Attention Repair Service 4700 Superior Street Lincoln NE 68504 USA Mailing Address Teledyne Isco PO Box 82531 Lincoln NE 68501 USA 800 775 2965 lab instruments 866 298 6174 samplers amp flow meters Sales amp General Information 800 228 4373 USA amp Canada Phone Repair service Fax 402 465 3001 Email October 11 2013 P N 60 1002 040 Rev H IscoService teledyne com KN TELEDYNE ISCO Everywhereyoulook
19. iations The strength of the echo depends on several factors including the distance between the transducer and the liquid surface As the distance increases between the transducer and the liquid surface the gain of the echo amplifier increases with time to compensate for the decreasing signal strength of the echo This type of amplifier whose gain characteristic is based on a repeating time interval is referred to as a ramp gain amplifier 2 1 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor Figure 2 1 Ultrasonic Level Sensor Operation 2 2 The sensor transmits an ultrasonic pulse Ir The flow stream surface reflects the pulse returning it to the sensor 2 3 Error Factors and Module Compensation 2 3 1 Velocity Errors 2 3 2 Echo Detect Errors 2 3 3 Beam Angle 2 3 4 Noise 2 3 5 Surface Objects 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor It is possible for the ultrasonic measurement system to be in error due to the influence of various factors on both the initial pulse and reflected sound wave It is important that you under stand these factors and take them into consideration when planning an installation Proper installation will result in more accurate measurements The factors affecting the ultrasonic system may be grouped broadly into two classes Velocity errors occur when the module is unable to accurately calculate the velocity of sound Without going into the cause
20. in death or serious injury 710 Ultrasonic Module Safety Hazard Symbols Warnings and Cautions The equipment and this manual use symbols used to warn of hazards The symbols are explained below Hazard Symbols The exclamation point within the triangle is a warning sign alerting you of important instructions in the instrument s technical reference manual The lightning flash and arrowhead within the triangle is a warning sign alert ing you of dangerous voltage inside the product Pinch point These symbols warn you that your fingers or hands will be seri ously injured if you place them between the moving parts of the mechanism near these symbols Ce symbole signale l existence d instructions importantes relatives au pro duit dans ce manuel Ce symbole signale la pr sence d un danger d lectocution Risque de pincement Ces symboles vous avertit que les mains ou les doigts seront bless s s rieusement si vous les mettez entre les l ments en mouvement du m canisme pr s de ces symboles Warnungen und Vorsichtshinweise A AN Das Ausrufezeichen in Dreieck ist ein Warnzeichen das Sie darauf aufmerksam macht da wichtige Anleitungen zu diesem Handbuch geh ren Der gepfeilte Blitz im Dreieck ist ein Warnzeichen das Sei vor gef hrlichen Spannungen im Inneren des Produkts warnt Vorsicht Quetschgefahr Dieses Symbol warnt vor einer unmittelbar dro henden Verletzungsg
21. install the ultrasonic level sensor on a convenient nearby wall over a flow stream Ultrasonic Transducer Mount The transducer mount is a collapsible metal floor stand that you set up at the bottom of a manhole over a flow stream Ultrasonic Cable Straightener The cable straightener is designed for use in installations where the transducer is sus pended by its cable only The straightener helps the transducer hang plumb Ultrasonic Calibration Target This option is designed to make calibration of the level sensor more accurate during the installation process by letting you calibrate the level sensor from outside the manhole Ultrasonic Sunshade The sunshade is a white plastic cap that fits over the top of the ultrasonic transducer Its purpose is to keep sunlight from heating the transducer body 710 Ultrasonic Module 5 2 2 2 uctor eee e eee ea aaa ei ei 68 6700 049 Includes module Ultrasonic Level Sensor and instruction manual Ultrasonic Level Sensor en nen idad de qao eaae 60 3214 025 Ultrasonic Cable Straightener 0 ccccccccccsssseceeceesseeeeceseseeeccsesaeeecssesseeeecsesaaeeeseseaeeeeenensaes 60 3213 061 Spreader Baton si 60 3004 110 Ultrasonic Level Sensor Cable ClaMP ooooccconooocnccnononnnncnnoonnnncnnnnnnnnnncnnnnnnnnnnnnnnnnncnnnnnnnncannnnnos 60 3004 129 Use with Spreader Bar Ultrasonic Wall Mount Bracket iii ate 60 2003 615 Ultrasonic Wall Mount old style ooooonoococccnonocnn
22. ised in the use of 10 or smaller Palmer Bowlus or Leopold Lagco flumes The channel to be measured can be pre qualified by a simple equation that will determine whether or not the channel is wide enough to allow correct positioning of the ultrasonic sensor Since the beam angle is 10 the equation is Minimum Width 0 18 x Range Where range is the distance from the bottom of the ultrasonic level sensor to the minimum expected level Range T Figure 2 3 Small Pipes and Narrow Channels 2 7 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor 2 8 2 4 8 Alternative Flow Measurement Systems Because of the characteristics of ultrasonic flow measurement there may be some installations where the ultrasonic method is either unreliable or inaccurate In these instances it is worth while to consider using an alternate method of flow mea surement In addition to the 710 Module Isco offers three other types of plug and play flow modules in the 700 Series the 730 Bubbler Module the 720 Submerged Probe Module and the 750 Area Velocity Module Information about these flow modules is available from the factory Call for more information or visit our Web site at Wwww isco com 710 Ultrasonic Module Appendix A Accessories Ultrasonic Sensor Cable Clamp The cable clamp is used with the Spreader Bar to secure the mounting of the ultrasonic level sensor Ultrasonic Mounting Bracket This device lets you
23. mming 710 Module Setup Screens 0 0000 cee eee eee 1 5 6712 Programming 710 Quick View Screens 000 cee eee eens 1 6 Ultrasonic Level Sensor Dead Band cece eee eee eee 1 8 Level Change Temperature and Calibration Factors o oo oooo o o 1 9 Mounting the Ultrasonic Level Sensor 0 0 00 cece eee eee eee 1 11 Mounting the Ultrasonic Level Sensor Continued oo ooooooooooo 1 12 Ultrasonic Level Sensor Operation 0 0 0 c cece eee 2 2 Foam and Oil on the Surface of the Flow Stream 0 cece eee 2 6 Small Pipes and Narrow Channels 0 00 0 c cece eee ene ene 2 7 List of Tables 1 1 1 2 Flow Conversion Methods 0 cece e eee nee 1 7 Technical Specifications for the 710 Module 0 0 00 cee eee 1 14 710 Ultrasonic Module Section 1 Installation and Programming 1 1 Introduction The 710 Ultrasonic Module is one of Isco s interchangeable modules for the Avalanche and 6700 Series Samplers The module uses ultrasonic reflection to measure level The ultra sonic level sensor is usually installed with some type of primary measuring device such as a weir or flume The module is dependable and easily installed The ultrasonic sonic transducer is unaffected by corrosive chemicals You can install the module only on a 6712 or 6700 controller The ultrasonic level sensor can be used in nearly any location with a known level
24. ncnnnonnnnncnnnononnnnnnnnnnnncnnnnnnnncnnnnnnnnnccnnnnoss 60 2443 092 Ultrasonic Floor Mount u eine 60 2004 611 Ultrasonic Cable Straightenet oi er rtr rtr E RI ERR REFER teer ERE EET EET sop ean 60 3213 061 Ultrasonic Calibration Target ann ale a ln Ban na 60 3004 143 Ultrasonic Sensor Sunshade Includes Adaptor essen 60 3004 142 A 1 710 Ultrasonic Module Appendix A Accessories A 2 Teledyne Isco One Year Limited Factory Service Warranty This warranty exclusively covers Teledyne Isco instruments providing a one year limited warranty covering parts and labor Any instrument that fails during the warranty period due to faulty parts or workmanship will be repaired at the factory at no charge to the customer Teledyne Isco s exclusive liability is limited to repair or replacement of defective instruments Teledyne Isco is not liable for consequential damages Teledyne Isco will pay surface transportation charges both ways within the 48 contiguous United States if the instrument proves to be defective within 30 days of shipment Throughout the remainder ofthe warranty period the customer will pay to return the instrument to Teledyne Isco and Teledyne Isco will pay surface transportation to return the repaired instrument to the customer Teledyne Isco will not pay air freight or customer s packing and crating charges This warranty does not cover loss damage or defects resulting from transpor
25. ramming 1 3 Mounting the Ultrasonic Level Sensor The location of the ultrasonic level sensor depends on the method of level to flow rate conversion used The ultrasonic level sensor is usually installed with some type of primary measuring device such as a weir or flume The location of the ultrasonic level sensor over the primary device depends on the type of primary device used Most primary devices have a specific place for the head level measurement device For example the head mea suring point of a weir is at least three times the expected maximum head upstream from the weir plate For Parshall flumes the measuring point is Y3 of the way into the converging section For Palmer Bowlus flumes the measuring point is at least Y2 of the pipe diameter upstream from the entrance to the flume For more details about the location of the head measuring point refer to the Isco Open Channel Flow Measurement Handbook or to information provided by the manufacturer of the primary device A list of available level to flow conversions appears in the following table Table 1 1 Flow Conversion Methods Conversion Type Weir Device Formula or Table V Notch Weir Size of Parameters 22 5 30 45 60 90 120 degrees Rectangular Weir with End Contractions Crest length Rectangular Weir without End Contractions Crest length rate Cipoletti Weir Crest length Flume Palmer Bowlus Flume 4 6 8 10 12
26. roper wave detection to increments of one half wave length This error is 0 007 foot Wind can blow the sound away or significantly reduce the intensity of the returned echo Narrow beam angles advanta geous for measuring small flow streams are a disadvantage in this situation Likewise greater distances to the surface of the flow stream are more affected by wind Changes in barometric pressure provide no significant cause of error Humidity causes only a slight variation to the velocity of sound maximum 0 35 at 68 F The module does not provide any compensation for humidity 2 4 Minimizing Level Measurement Errors 2 4 1 Temperature Differences 2 4 2 Avoid Wind 2 4 3 Excessive Distance 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor In order to minimize measurement errors with the ultrasonic level sensor the following precautions should be observed when installing the ultrasonic level sensor These are listed in the approximate order of their significance Isco recommends that you install the ultrasonic level sensor where the temperature of the sensor housing can represent the air temperature throughout the distance measured Avoid loca tions where the sensor will operate at a different temperature than the air between the level sensor and the flow stream Air temperature affects the speed of the transmitted pulse The ultrasonic level sensor housing includes a sensor which provides temperature readings
27. tation between the customer s facility and the repair facility The warranty for any instrument is the one in effect on date of shipment The warranty period begins on the shipping date unless Teledyne Isco agrees in writing to a different date Excluded from this warranty are normal wear expendable items such as pH sensors charts ribbon lamps tubing and glassware fittings and wetted parts of valves and damage due to corrosion misuse accident or lack of proper maintenance This warranty does not cover products not sold under the Teledyne Isco trademark or for which any other warranty is specifically stated No item may be returned for warranty service without a return authorization number issued by Teledyne Isco This warranty is expressly in lieu of all other warranties and obligations and Teledyne Isco specifically disclaims any warranty of merchantability or fitness for a particular purpose The warrantor is Teledyne Isco 4700 Superior Lincoln NE 68504 U S A This warranty applies to the USA and countries where Teledyne Isco does not have an authorized dealer Customers in countries outside the USA where Teledyne Isco has an authorized dealer should contact their Teledyne Isco dealer for warranty service Before returning any instrument for repair please call fax or e mail the Teledyne Isco Service Department for instructions Many problems can often be diagnosed and corrected over the phone or by e mail wit
28. tically This is very important since misalignment may result in erratic or erroneous level readings because of echo bouncing off the walls ofthe channel The ultrasonic level sensor is shipped with a protective cap cov ering the transducer Remove the cap after the level sensor is installed as it will prevent correct operation if left in place 710 Ultrasonic Module Section 1 Installation and Programming q Suspended by Cable Figure 1 7 Mounting the Ultrasonic Level Sensor 1 11 710 Ultrasonic Module Section 1 Installation and Programming Figure 1 8 Mounting the Ultrasonic Level Sensor Continued 1 5 Maintenance 1 6 How to Get Help 1 7 Flash Memory and Software Upgrades 710 Ultrasonic Module Section 1 Installation and Programming The ultrasonic level sensor requires little maintenance It is encapsulated for protection from the environment The level sensor s transducer surface is aluminum coated with a Teflon film Do not scratch or score the surface the transducer may be damaged If the transducer s surface becomes contaminated due to long term use or accidental submersion operation of the unit may be impaired Ifthis happens clean the case with a brush but do not brush the transducer s surface or it may be damaged Clean the surface of the transducer with gently flowing water Do not drop the assembly nor attempt to take it apart The ultra sonic level sensor contains no user serviceable parts I
29. to flow relationship where it can be suspended at least one foot above the highest anticipated level of the liquid The module has not been approved for use in hazardous locations as defined by the National Electrical Code Installation of this module in a hazardous location may cause fire or explosion resulting in death personal injury or property damage Before installing any device in a dangerous location review safety precautions in your sampler manual Check applicable guidelines codes and regulations of federal state city and county agencies 1 1 1 Installing the Module To install the module 1 Turn the sampler off 2 Remove the connector cap in the module bay and move it aside 3 Slide the module into the bay 4 Push against the module to be sure the connector is fully seated To remove the module turn the sampler off Press the silver button and pull the module from the bay Replace the connector cap in the module bay 1 1 710 Ultrasonic Module Section 1 Installation and Programming Figure 1 1 710 Module Installed on Sampler 1 1 2 Installation Checklist 1 2 Programming Notes 1 Install the module and turn the sampler on 2 Install the level sensor over the channel 3 4 Program the sampler and calibrate the module s level read Connect the level sensor s cable to the module ing If the level is a negative value or if you need to toggle between positive and negative in the ADJUST L
30. ts case is completely sealed to protect the internal components Repair of the unit must be done at the factory If you think your module requires repair contact Isco s Technical Service Department If you need help or have repair questions contact Isco s Tech nical Service Department Isco Technical Service Department P O Box 82531 Lincoln Nebraska 68501 USA Telephone 866 298 6174 FAX 402 465 3022 Email IscoService teledyne com The module has Flash memory to store its software With Flash technology you can upgrade your module s software without sending it back to the factory or replacing a chip To update the module software install the module in an Avalanche or 6712 Sampler Then connect the sampler power source and turn the sampler on Connect the sampler to a computer and follow the instructions received with your Flash Update program 710 Ultrasonic Module Section 1 Installation and Programming 1 8 Technical Specifications Table 1 2 Technical Specifications for the 710 Module Module Weight 1 1 Ibs 0 5 kg Transducer Weight 2 1 lbs 1 0 kg transducer and cable Module Dimensions 4 9 x 5 7 x 2 0 inches 12 4 x 14 5 x 5 1 cm Transducer Dimensions 2 3 inches diameter x 6 inches long 5 7 x 15 2 cm 25 foot cable 7 6 m Module Material Polystyrene Transducer Materials Delrin housing with PVC cable Operating Temperature 32 to 120 F 0 to 4
31. urface If the flow stream surface is absorbent such as with foam or very irregular such as highly turbulent water the ultrasonic echo may not be correctly reflected back to the ultrasonic level sensor This can result in a false measurement or no mea surement at all If the foam is reflective the system will detect the top of the foam rather than the liquid surface Also if grease or oil is floating on the flow stream surface it will be detected rather than the liquid surface Actual Distance Detected Distance Figure 2 2 Foam and Oil on the Surface of the Flow Stream 2 6 2 4 7 Small Pipes and Channels 710 Ultrasonic Module Section 2 The Ultrasonic Level Sensor Small circular pipes narrow channels and small flumes may also cause problems with ultrasonic distance measurement Since the ultrasonic pulse expands outward from the sensor at a beam angle of approximately 10 it may strike the sides of a channel or the sloping sides of a circular pipe with low flow This can result in false echoes and incorrect level readings The term small channels generally refers to U shaped channels and pipe inverts 10 in diameter and less The term small flumes generally refers to 1 and 2 Parshall flumes It should be noted that the level measuring point for many types of flumes Palmer Bowlus Leopold Lagco etc is not in the flume but upstream in the invert of the pipe Thus care should also be exerc
32. urface and then measuring the time it takes for the echo to return The ultrasonic level sensor consists of an enclosure with a single transducer acting both as a pulse transmitter and echo receiver Since the speed of the pulse through the air varies with temper ature compensation is built in A sensor inside the enclosure measures ambient temperature The microprocessor automati cally compensates for speed of sound changes caused by air tem perature fluctuations Several times a second the ultrasonic level sensor emits a pulse Between pulses the transducer becomes a receiver ready to sense the echo reflected from the surface of the liquid When the transducer receives the echo the sound energy creates a small electrical pulse that is amplified and detected by the module The time between the transmitted pulse and the received signal is proportional to the distance between the transmitter and the liquid surface This distance determines the liquid s level The module checks the measured level for validity Ifthe sampler cannot obtain a valid reading from the module after about one minute the sampler assumes the reading has not changed and will continue The ultrasonic measurement technique used in the module is based on the speed of sound in air Since the speed of sound in air varies with temperature approximately 1 for 10 F variation compensation must be provided The ultrasonic level sensor accounts for air temperature var
33. vel H was cali brated Dz is the distance from the level sensor to the zero level Hz of the primary device Note that errors caused by the velocity of sound will be mul tiplied by the distance from the level sensor to the liquid surface D As the distance D increases the possibility of error increases LEVEL The depth of water above the primary de vice s zero level Hz point May also be referred to as head In this manual level and head are interchangeable terms The module calculates level using the following formula H Dz D Hc is the level when the module was calibrated H is the level at the present time H is shown above Hc However if the level had dropped af ter calibration H would be below Hc LEVEL CHANGE Hchg is the change in level over time The maximum change in level that the module can detect is 10 feet Hchg H Hc MAXIMUM HEAD Hmax is the maximum level that the module can measure This is dependent on the installation of the sensor the distance from the sensor to the liquid and the calibration of the module For example if the sensor is in stalled 5 feet from the liquid level and this level is entered as 10 feet then the maximum head will be 14 feet TEMPERATURE Since temperature significantly affects the velocity of sound a temperature mea surement is made by the module to provide com pensation CALIBRATION TEM
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