TruBlue Data Loggers - Manual
Contents
1. i Ee Gi Le Ubi www lruBlueMonitor com order online www LevelandPressure com I O00 745 0000 AUGUSIZUT 1 Introduction EE 1 Taak YOU TOT OUr OC OE aA 1 About Measurement Specialties Pressure Systems 1 Juarez gau EE 1 EE SOON ee Ordering Products and Accessories sa 1 Manual Content Mezu EE 1 2 TruBIUCG series ovprvlguw cece etter tet tititttettttee 2 3 using the TruWare software program 3 4 connections and field installation 5 wo Types of Field Cable EE 5 Interface LableAssembiv tetr r tte E Arre REPER EEE REEERE EEEEEEE REEE EEEE 5 SUSPENSION Tt 5 Connecting the Transducer to the Field Cable rr 6 Connecting to a Computer or Other Uevce rs 7 Iintertate Cable Assembly degen EE 7 MPC OE EE 8 internal Sarda daidala 8 General Field HVS aa Ol E 8 EE J de GREEN S EE 10 BEE 1 OCG IV EE 10 Types of Conductivity Measuremg ttr r rtt estr rre EEE EEEE EEEE EEEE EEEn ren 10 Actual Conductivity ugi siesta secession eebe ef SEA 10 Specific Conductivity eee 10 SEN E 10 TruBlueUsersManual tableofcontents Calibrating the Conductivity SONS EE 10 ZE utza bapa er E A 11 Ceanna Tour Fan d EE 11 de A ee I EE 12 8 warranty and product return procedures ou 16 ET 16 Merchandise Return a ug e 16 9 appendix A TruBlue connection diagrams 18 Appendix A TruBlue Connection USOS a 18 Figure A 1 Model EE 18 Figure A 2 Model E 19 Fig r A 3 Model EE 20 BUE Model ENT EE 21 Figure A 5 Model gn 22 Figure2. term monitoring is being employed or gt D D TTI gt lt gt JJ CO TI mi T D zZ TTI EO gt EO gt GO JJ D gt lt da security and cost are an Issue FIGURE MODEL measurement ER Nd LEI bd I EO Toll Free 800 745 8008 Phone 757 766 1500 E mail WL sales meas spec com Wwww meas spec com
3. A gt e GEN RS 485 B gt a o BLK GND gt 4 RED 6 16 V gt 9ulu1 dey3 gt D D TTI EO Se gt JJ Cc CO TI mi EO 3 TTI T D zZ D gt GO JJ D gt lt N Figure A 2 below shows the RS 485 communications signal assignments on the 854 permanent communication cable 9 pin D connector that are required for serial communications Also Shown are the signal assignments for the power connector that is found on the user above ground end of the Model 854 cable assembly If you need to fabricate your own power con nector to mate to this ensure that the polarities are correct as shown below HIROSE CONNECTOR B SHIELD FIGURE 854 z BATTERY CONNECTOR aan communication 1 o WHI RS 485 gt a o BESSE gt a o EEE o 4c RED 6 16 V gt COMMUNICATION CONNECTOR RS 485 PIN 2 RS 485A 1 PIN 3 RS 485B Se bd PIN 4 GND 6789 ee EL DC POWER CONNECTOR 6 16 VDC DC POWER CONNECTOR 6 16 VDC KOBICONN 171 0702 EXx KOBICONN 163 0301 EX Figure A 3 contains the signal assignments for the RS 232 side of the Model 860 RS 232 to RS 485 converter his may be required if you are fabricating your own communications cable or interfacing the Model 860 to a unique seria device FIGURE MODEL converter SERIAL CABLE 9ulu1 dey3 PIN 2 RS 485A PIN 3 RS 485B PIN 4 GND PIN 1 DCD PIN 2 RD PIN 3 TD PIN 4 DTR DIN 5 GND PIN 6 DSR
4. A 6 Model EA atant r arakat nt arar EEEE AAE AEA ERREA AEAEE renarna rera Ge Introduction thank you for your purchase The TruBlue line of water level transducers offers accuracy versatility and extensive fea tures You ve made a commitment to quality In return we promise a high level of service and support to help you get the most from your investment in leading edge environmental monitoring instrumentation about pressure systems September 2010 Measurement Specialties Inc NASDAQ MEAS a global designer and manufac turer of sensors and sensor based systems announced the acquisition of Pressure Systems Inc PSI Measurement Specialties will continue to develop manufacture and service highly accurate level measuring instruments for environmental applications and is commited to consistently meeting and exceeding customer s expectations website and e mail You can visit our website at www meas spec com for information on our latest product releases application notes product specifications and certifications and IS control installation drawings We welcome your questions and comments and strive to reply promptly Please e mail us at WL sales meas spec com technical support While this manual provides extensive guidance for everything from setup through maintenance we understand that there s nothing like getting an expert on the phone to provide quick answers and help address challenges for your particular application
5. cally to manage ITruBlue transducers and the data they collect Used together a TruBlue transducer and IruWare are Ideal for monitoring groundwater and surface water levels inwells open channels lakes streams and reservoirs as well as general watershed management FIGURE THE 803853 a ell 909911 CFE ea 0 040 si 22 0 a E 010 73 8 15 Apr 2010 04 04 59 PM 15 Apr 2010 04 04 59 PM GE 0 175 psiA 72 0 F 15 Apr 2010 04 04 59 PM S With its highly visual interface and powerful features IruWare makes it easy to manage your ruBlue transducer with TruWare you can e Make a direct connection between a PC or laptop and one or more transducers fig 2 e Program tests customized data collection schedules for connected transducers e Extract data from a previously initiated test e View save and export test data and real time readings O OO po CD TT rko pre CD CD 14 975 ere e a dd NIZ JHAXUVMNGL JHL ONTZI For detailed instructions on using TruWare please see the TruWare Users Manual that comes with the software and is also available at our website 4 connectionsandtieldinstallation two types of field cable There are two types of cable that may be used in deploying your TruBlue transducer universal cable or suspension wire Which you choose will depend on the transducers pressure format absolute or vented gauge and c
6. properly to pressure changes 3 The transducer can be cleaned by gently swishing the transducer back and forth in a bucket of warm soapy water until the residue softens and washes off See Cleaning Your Transducer Chapter 6 Under no 3 circumstances should any object or tool be used to remove residue 3 from the sensing diaphragm which could cause permanent damage 3 If cleaning the diaphragm does not solve the problem the transducer should be returned to the factory for repair or replacement eee symptom Transducer suddenly fails during or just after a nearby lightning event INILOQOHSAITENOdL procedu re This failure is usually caused by overvoltage due to ground transients 3 resulting from a direct or indirect lightning event These transients can travel distances of a mile or more The transducer may be returned to 3 the factory and replaced at a reduced cost by a newly manufactured 3 unit Upgrading the transducer to include our internal lightning 3 protection system would be highly recommended Our lightning protection system provides a lifetime warranty against transducer failure due to lightning A transducer may have this option installed when it is newly manufactured D D D D D D D D 7 troubleshootingcontinued Yd symptom 3 Transducer response to pressure level input changes becomes sluggish procedu re This is usually a sign that the sensing end of the transducer has become
7. If you have questions concerning any of our products call 757 766 1500 or 1 800 745 8008 extension 4398 Monday through Friday between 8 00 a m and 5 00 p m Eastern Standard Time ordering products and accessories For your convenience orders may be placed on line by visiting our e commerce website www LevelandPressure com You can also contact our Customer Service department at 1 800 745 8008 or contact your local representative Expedited shipping is available 9u01 dey3 Z JJ qip CO Z MANUAL CONTENT DISCLAIMER This users manual was prepared for the current firmware and software releases at the time of the manual publication While this document is believed to be thoroughly reliable Measurement Specialties assumes no liability for inaccuracies Addenda will be distributed as deemed necessary All computer programs supplied with your products are written and tested on available systems at the factory Measurement Specialties as sumes no liability for other computers languages or operating systems We reserve the right to change the specifications without notice Any questions regarding firmware upgrades may be addressed to Applications Engineering Application software and transducer firmware revisions as well as manual addenda may be ob tained from on www meas spec com gt Q O ek CD A erk O MAIAXYAAO Sdldds dATaNaL 2 lruBlueseriesoverview TruBlue represents the leading edge o
8. PIN 7 RTS PIN 8 CTS PIN 9 RI Figure A 4 contains the signal assignments for the Mode 860 100 RS 485 to SDI 12 converter This may be required when connecting the ruBlue transducer to a 3rd party device gt D D TTI 2 EO gt lt D gt JJ on CO TI mi SS CH zZ mi D CH zZ J gt ap JJ gt lt da FIGURE MODEL converter to eek Q OO m CD TT eei gt CD PIN 2 RS 485A PIN 3 RS 485B PIN 4 GND SDI 12 MUST USE GENDER CHANGER FOR 855 CABLE a HIZ IU NOILOAINNOOD ANTENGL V XIGN4d4ddV 851 absolute communication cable This communication cable is designed specifically for the technician in the field to extract data from the TruBlue transducer quickly and efficiently It includes an RS 485 communica tion connector DC power connector and battery connector The Model 851 is not intended for field deployment BATTERY DC POWER FIGURE absolute CONNECTOR CONNECTOR 6 16VDC cable Q ZO D OK CAUTION COMMUNICATION CD CONNECTOR eg RS 485 ees ges CD dietako PIN 2 RS 485A PIN 3 RS 485B PIN 4 GND model 852 suspension wire assembl The 852 suspension wire assembly is intended for use with absolute transduc Cuamm ee mg ers to suspend the unit This assembly e includes a stainless steel or titanium d backshell carabiner and ETFE coated Stainless steel suspension wire This option should be considered when long
9. and the open connecting end of the cable EO assembly is also oO sometimes called zZ the thimble bB p GO zZ Ro FIG TRANSDUCER ASSEMBLY Di E I SE eo z N KR EE iiid gt Se S gt oO Z e Gently insert the transducer housing into the cable thimble knurled assembly Hold the transducer assembly in one hand and the cable in the other near the thimble e While applying slight pressure to push the two parts together slowly rotate the transducer assembly in the thimble until the keys align When that happens the housing will slip into the thimble assembly an additional inch and you will no longer be able to rotate the transducer while holding the cable e Now that the keys are aligned and seated grasp the transducer in one hand and the knurled thimble in the other e While applying slight pressure to push the two parts together screw the thimble onto the transducer housing Continue threading the parts together until they are fully mated leaving no visible gap where the thimble meets the transducer housing connecting to a computer or other device INTERFACE CABLE ASSEMBLY he up end of the 853 Interface Cable assembly provides simple yet elegant TruBlue connection to the above ground environment i e E The assembly incorporates an innovative vent filter that provides lifetime moisture protection for vented gage transducers A GORE TEX plug prevents water droplets from en
10. d of the 3 galvanic series Likewise a voltage potential between the ground wire 3 of the transducer and the ground of other equipment in the well can lead to galvanic corrosion Installation of a sacrificial anode model 820 or 825 will help protect your transducer from galvanic corrosion ap Sp Lu O rF CD N CD lt CD INILOQOHSAIANOUl 7 troubleshootingcontinued a Se symptom Transducer has an offset error procedu re 3 Our submersible transducers perform best when pointing downward 3 Keep in mind that you can experience offset error due to the position e sensitivity or orientation change of the sensor Offset errors are more e prominent in low pressure applications with the sensing end of the transducer lying flat or pointing upward Offset adjustments can be 3 made thru TruWare software SJHNGIIOUd NHYNLIY LONGOUd E HEED EICH 3 warrantyandproductreturnprocedures Warranty Any transducer that is less than 2 years old see DOM which does not meet theproduct s specifications and exhibits no physical damage to the housing sensor or cable cuts will be replaced under warranty Units 2 3 years old Units that fall within this age group and exhibit no obvious physical damage to the housing sensor or cable cuts can be replaced at a discounted list price Units greater than 3 years old Units that fall within this age group are not replaced under warranty merchandis
11. e return procedures Contact the KPSI Applications Engineer ext 4398 if your transducer is not operating properly The engineer will work with you to troubleshoot the problem and if necessary forward you to Customer Service for a Returned Merchandise Authorization RMA Please do not ship until you have obtained a Returned Merchandise Authorization RMA and instructions from the Customer Service The staff is available for trouble shooting at 757 766 1500 or toll free at 1 800 745 8008 during normal working hours Eastern standard time Be prepared to supply the following information when requesting the RMA e Transducer part number e Serial number e Complete description of problems symptoms e Bill To and Ship To address The above information including the RMA number must be on the customer s shipping documents that accompany the equipment to be repaired Prior to returning the transducer and cable must be cleaned per instructions provided on the cleaning certificate supplied when the transducer was delivered The certificate can also be found on our website www meas spec com The completed certificate must accompany the transducer when shipped We reserve the right to reject any shipment deemed to be unsanitary or environmentally unsafe to handle If these guide lines are not met the package could be sent back unopened at the customer s expense SJHNGIIONd NHYNLIY LINAGOYd E urrun iustu All equipment should be sent to
12. f pressure sensing technology Built with power con serving microcomputer circuitry and offering the highest level of functionity and accuracy available the TruBlue series comprises four transducer models model measuresandlogs submersible TRUBLUE 555 LEVEL 7 Temperature amp Level 3 Yes TRUBLUE 565 LEVEL Temperature amp Level High Accuracy Yes TRUBLUE 575 BARO Temperature amp Barometric Pressure No TRUBLUE 585 CTD Conductivity Temperature amp Level 3 Yes key features User friendly TruWare software Included New fully sealed design 5 year permanent battery at a 15 minute logging rate 8MB internal memory Rugged 316 stainless steel with poly cable or titanium with ETFE cable for harsh environments for submersible devices 2 year warranty against manufacturer defects Level barometric pressure accuracy of 0 1 of FS and high accuracy of 0 1 reading Vented or absolute reference Calibration report included with each instrument when shipped Easy set up and data retrieval Integrated temperature measurement up to 0 2 C accuracy Field upgradeable firmware Quick disconnect cable assembly Industry standard SDI 12 protocol Optional RS 485 to SDI 12 converter for connectivity to 3rd party SDI 12 devices ap gt O O DE CD TZ ko ba CD CD ZN NIZ EZEN AITE AHL ONTZI 3 usingthe lruWaresottwareprogram Both powerful and user friendly TruWare is the software program designed specifi
13. fouled with residue The transducer must be removed from service and the sensing diaphragm cleaned as described in Chapter 6 Symptom Output reading is within limits but freezes at one point procedu re 3 In certain environments crust may form over the sensing diaphragm preventing the sensor from identifying change In level Removing the ap eek Lu O rF CD N CD lt CD transducer from service and cleaning it as described in Chapter 6 will generally solve the problem To combat marine growth you might try wrapping the transducer with copper wire similar to that found in 3 wire scouring pads for cleaning dishes Marine growth occurs on the 3 copper and eventually erodes the copper and drops off or the copper is manually removed during routine maintenance Alternatively there are 3 various companies that will impregnate coat the 316 stainless steel with coatings of anti fouling chemicals Level transducers temporarily removed from the well or sump should not be stored dry but should be stored in a bucket of fresh water in order to prevent crust formation aa e ba Symptom Readings increase very slowly over time IJNILOQOHSAIANOUl procedu re 3 Our cable is shipped coiled and consequently takes time to straighten 3 when installed To prevent cable stretch with lengths greater than 200 3 feet 60 m secure the Kevlar fibers just under the cable jacket to your junction box o
14. fyourctd conductivity temperature depth device general maintenance principles Conductivity meters and cells should be calibrated to a standard conductivity solution ALIAILONGNOOD This should only be done when the device is clean Selecting standards is very important you should always choose one that has the approximate conductivity of the solution environment to be measured stream ocean etc Sometimes users like to have a second cali bration point either above or below the main calibration point which is useful for measuring applications that have greater conductivity spans Conductivity sensors like any other sensor installed in a process will eventually succumb to contamination from the process Regular cleaning of the conductivity sensor will assure long reliable and accurate service Careful examination of the electrodes should be performed to make sure they have not been chemically attacked eroded or physically altered A slow degradation of the sensor is hard to spot until it s too late Cleaning should be done with a combination of soaks and rinses in a solution of water and detergent This usually removes most contaminants Persistent contaminants may require a brief soaking in weak acid or diluted caustic solutions Acetone easily cleans most organic matter and hypochlorous solutions will remove algae bacteria or molds Follow by thoroughly rinsing with clean water to remove and neutralize any residual ac
15. id or caustic solutions CAUTION Always follow all safety procedures when using chemicals to clean conductivity sensors cleaning your transducer The transducer can be cleaned by gently swishing the transducer back and forth in a bucket of warm soapy water until thae residue softens and washes off Either a x s dey3 clogged nose piece or a dirty transducer diaphragm could result in erroneous readings from your transducer WARNING Never attempt to clean your transducers nose piece or diaphragm with asharp or hard object This could dent the sensor diaphragm and cause permanent damage to the transducer qip Z OO a Cc lt lt troubleshooting ZE Symptom Transducer has failed and has been removed for analysis procedure Inspect the transducer housing It should be intact and free of 3 corrosion If the outer surface of the transducer is pitted this could be an indication of galvanic corrosion caused by stray ground currents 3 If this is the case the transducer will probably need to be replaced 3 If the external case exhibits none of these characteristics carefully 3 unscrew the nosepiece and look into the pressure sensing end of the 3 transducer The concentric rings of the sensing diaphragm should be 3 visible If they are not it could be that residue has accumulated on the qp F Lu O CD ee N CD lt CD diaphragm preventing it from responding
16. ing moisture intrusion the units batteries cannot be removed E a O r CD ed O ba 3 replaced or recharged he two 3 volt lithium ion batteries that are built into the unit will last five years when logging every 15 minutes after which an external power source can be used through the use of an external battery connector Ed C lt D D D e internal clock synchronization E When received from the factory your TruBlue transducer s internal calendar clock will be set to Eastern Standard Time The internal clock can be quickly and easily synchronized Go DN to your local clock and time zone using TruWare Please refer to the TruWare User s m Manual for details general field installation e The TruBlue is calibrated for operation in a vertical upright position with the cable E extending up Although it may be operated in any orientation anything other than this gt vertical position will result in a slight zero offset in the measured data If the transducer E will be operated in a known non vertical orientation this zero offset error may be Z easily calibrated out cable protection Cable damage is one of the most common causes of transducer failure Here are a few precautions you should take in order to extend the life of your TruBlue transducer e When working with your transducer cable make sure the cable does not drag over sharp edges This could nick or cut the cable outer jacket A c
17. ommunications needs THE INTERFACE CABLE KA eek eh CH eko CD dd O TEK UNIVERSAL model ASSEMBLY includes power and communications conductors as well as a reference pressure vent tube It ZO should be used with all vented TruBlue transducers It can also be used with e absolute transducers in order to pro vide the ability to communicate with a the transducer without extracting It Vi from its measurement location Ge UC E THE SUSPENSION WIRE ZO e is a low cost suspension solution a intended for use only with absolute e transducers Since there Is is no vent SS tube or desiccant filter maintenance is minimal On the other hand the fact j that there are no communications d conductors in the cable means that eee A in order to communicate with the r transducer it will need to be removed from its measurement location connecting the transducer to the field cable e Inspect the two O rings C on the open connecting end of the transducer Make sure they are clean and not damaged Figure 4 2 e Look inside the open connecting ends of the transducer and the cable to see how the two mate together Note the two keys in the transducer and cable assemblies and the fact that they are different sizes to ensure proper alignment Figure 4 1 FIGURE CABLE KEY Figure 4 1 A Transducer cable o gt o O mF CD TT d O c e mating key
18. r other secure object 7 troubleshootingcontinued O Symptom No electrical output from your transducer procedu re Check all electrical connections to make sure they are correct and 3 secure Replace the battery to ensure that the transducer is getting power If the problem persists it could be a circuit board or the 3 sensor in your transducer The unit must be returned to the factory 3 for evaluation The most probable causes for this type of failure are lightning damage or damage to the submersible cable jacket allowing water to leak down the cable and into the transducer housing a D ba Symptom Formation of marine growth on a submersible transducer qp F Lu O CD N CD lt CD procedure 3 Certain transducer construction materials for example 316 stainless l steel attract marine life snails and algae Clean the transducer diaphragm by soaking it in a bucket of warm water with a non aggressive 3 cleaning solution You can also coat the transducer with marine grease 3 This may be the most effective and inexpensive way to protect your transducer Symptom Submersible transducer exhibits corrosion or pitting on body procedure dlaphragm Dissimilar metals for example your transducer housing and your pump INILOQOHSAITHNOdL 3 housing in an electrolytic environment fluid in your well can lead to 3 galvanic corrosion of the metal that is nearer the anodic en
19. rs gt ACTUAL CONDUCTIVITY O UNITS microSiemens per centimeter u S cm default gt millisiemens per centimeter mS cm gt SPECIFIC CONDUCTIVITY E UNITS microSiemens per centimeter u S cm default 2 millisiemens per centimeter mS cm A means of expressing what the actual conductivity of a solution would be at a stan dard reference temperature 25 C Calculated from actual conductivity and tempera ture The factory default coefficients calculate specific conductivity per Standard Methods 2510B calibrating the conductivity sensor STEP 1 GATHER SUPPLIES YOU WILL NEED e Calibration solution available from Pressure Systems and other outlets e A clean beaker for calibration solution STEP 2 RINSE THE SENSOR A Dry the body of the unit if is wet then invert and shake to remove any liquid inside the conductivity sensor B Before opening the solution bottle invert it a few times to redistribute any water condensation C Insert the TruBlue 585 CTD into the test beaker D Remove the TruBlue 585 CTD and discard the solution E Ideally rinse again repeat STEP 2 AE CJ Sp o O m CD A ed lt CD STEP 3 EQUALIZE THE TEMPERATURE A Fill the beaker with calibration solution B Install the TruBlue 585 CTD and tighten the cap C Invert several times for at least 30 seconds longer if the probe and solution are at different temperatures STEP 4 CALIBRATE FOLLOWING SOFTWARE INSTRUCTIONS 6 maintenanceo
20. tering Jnolsjeideuys the filter while allowing air to pass freely to the internal silica gel desiccant The ae filter housed in corrosion resistant grade zZ 316 stainless steel also provides surge protection and features a compact electrical z connector The 853 Universal Cable connects to the computer via a communications cable For this there are two options EA 1 THE 855 CABLE a 652 An all in one adapter enabling connection 7 to a computer modem or PDA It features e built in conversion to RS 232 and USB as well E as a DC input connector gt 2 THE 854 CABLE An an economic alternate for permanent installations The cable incorporates a DC input ABSOLUTE VENTED connector but requires external converters to connect to an RS 232 serial port or USB port SUSPENSION WIRE Absolute transducers typically use the 852 Suspension Wire when deployed unless the ability to communicate without extraction is desired in which case a universal cable can be used The 853 Universal Cable is still needed to extract data in addition to the 855 Universal Adapter Connecting the 851 Communication Cable to a computer requires an adapter There are three adapters to choose from 1 The 860 Adapter connects to an RS 232 serial port 2 The 860 100 Adapter connects to an SDI 12 port 3 The 860 200 connects to a USB port TIP Because of your TruBlue transducer s sealed design which improves durability by eliminat
21. the following address ATTN KPSI TRANSDUCER REPAIR DEPARTMENT 7 digit RMA number Measurement Specialties Inc 1000 Lucas Way Hampton Virginia 23666 Incoming freight charges are the customer s responsibility The customer is also responsible for paying shipping charges to and from Measurement Specialties Inc for any equipment not under warranty Cd O O errio CD TT es es CD a HIZTU NOILJOAINNOOD ANITENdL V XIGN4d4ddV 9 appendixA IruBlueconnectiondiagrams 855 Technicians Communications Cable The 855 Technician s Communications Cable provides connection from the 853 interface cable assembly to a modem PDA or computer and includes built in conversion to RS 232C and USB as well as a DC input connector The 3 foot coiled cable can remain connected to an RS 232C modem port and communicate with a PDA handheld via USB Connect the Model 860 100 Figure A 3 for RS 485 to SDI 12 MINI USB POWER CONNECTOR CABLE 4 CONDUCTOR 28 AWG TC PP INSULATION 0 035 1 40 THUMB TYPE B 2 5MM CNTR CODED BLK WHT RED GRN OVERALL TC SPIRAL SHIELD SCREWS POS 6 16 VDC POLYURETHANE JACKET MATTE BLACK 0 1604 010 INCHES PROTOCOL SWITCH 36 0 INCHES ce WHEN FULLY Ge EXTENDED DBF CONNECTOR CONNECTOR WATERPROOF URS 232 MODE MINIATURE HIROSE ae HR30 6PA 6P 71 3 RD OUTPUT C 5 GROUND NA d Ae er 2 dDATAA a DATAR ta 5 GROUND HIROSE CONNECTOR FIGURE 855 5 SHIELD communications e 1 WHT RS 485
22. ut in the outer jacket could allow water into the transducer electronics causing permanent damage e Our polyurethane jacketed cables are quite flexible however care needs to be taken to avoid crimping the vent tube inside the cable when bending the cable to suit your installation To avoid this do not bend your cable tighter than a radius of 1 inch e f you use a compression fitting or strain relief to secure the cable as it enters a junction box be careful not to over tighten the fitting to the extent that it damages the cable or crushes the Internal vent tube WARNING Crimping the vent tube with tight bends or crushing it within the cable can block the reference pressure port of the TruBlue transducer This will prevent the reference from registering atmospheric or temperature related pressure changes resulting in measurement offset errors o eek eh CH eko CD A do O TEK C2 z e b 5 conductivity es WHATIS CONDUCTIVITY Conductivity or conductance is the degree to which a 7 material conducts electric current In water high conductivity often indicates the presence of D a high concentration of dissolved salts and minerals Conductivity measurements can be valu E able for detecting and monitoring saltwater intrusion surface water infiltration and mixing and certain pollutants and contaminants m TYPES OF CONDUCTIVITY MEASUREMENTS The TruBlue 585 CTD instrument can calculate and record the following paramete
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