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MEAS LT USER MANUAL

1. 3LLVS9 VOLTMETER 0 VOLTAGE ON THE CASE 0 VOLTAGE ON THE CASE Maximum Cable Lengths and Minimum Supply Voltage The maximum length of cable to be used with our submersible transducers is largely dependent upon the type of electrical output of the transducer For a 0 5 VDC output a maximum cable length of 100 feet 30 m is recommended A voltage output is more susceptible to electrical interference than a 4 20 mA signal A 4 20 mA signal can be transmitted much longer distances depending upon such factors as temperature wire size length of the wire power supply and voltage requirements of any devices to be powered At 25 C the 22 AWG conducting copper wire used in our polyurethane jacketed cable has a resistance of 16 45ohms per 1000 feet 304 m Using Ohms Law E IR where E voltage I current and R resistance one finds that a 20 mA signal requires 329 volts to drive it along 1000 feet 304 m of 22 AWG copper wire E 16 45 x 020 This drop is seen on both the supply and return wire for a total loop voltage drop of 0 658 volts To find out how much voltage is required to drive our MEAS LT submersible level transducer s 4 20 mA signal 10 000 feet just add the minimum power requirement of the LT transducer 9 VDC to the resistance offered by 10 000 feet 3048 m of our polyurethane jacketed cable 10 000 1000 x 658 6 58 The resulting power requirement is 15 58 VDC 9 6 58 Connect th
2. 2 00 10 3403 10 3205 0 1241 10 3228 0 1095 3 00 13 5371 13 5237 0 0841 13 5244 0 0798 4 00 16 7340 16 7370 0 0185 16 7390 0 0313 5 00 19 9310 19 9569 0 1623 19 9591 0 1764 4 00 16 7340 16 7365 0 0156 16 7393 0 0327 3 00 13 5372 13 5228 0 0904 13 5255 0 0730 2 00 10 3403 10 3217 0 1163 10 3235 0 1053 1 00 7 1435 7 1355 0 0498 7 1364 0 0443 0 00 3 9566 3 9786 0 1377 3 9788 0 1391 Maximum Static Error 0 1764 FSO Maximum Non Repeatability 0 0174 FSO Electrical Termination RED SUPPLY pee S poe PSIG mA BLACK SUPPLY ero set 1 00 PSIG BLUE SHIELD Slope2 3 1969 mA PSIG Zero Offset2 3 9466 mA Conversion Factor 1 0000 Calculations Method 1 Calculate pressure in desired units using sensor s output as independent variable PSIG 0 3128 mA 3 9466 0 0000 Method 2 Calculate predicted sensor output in desired units using pressure as the independent variable mA 3 1969 PSIG 0 0000 3 9466 3 17 2014 12 09 41 Page 1 of 1 Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 30 of 31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIES e e User Manual e MEAS LT Level amp Pressure Transducer User Manual In this case even though the offset or 0 PSIG output was 3 9565 mADC and the full scale point was 19 9310 mADC the unit actually performed better than its specified accuracy of 0 25 of full scale range as indicated in the Error FS
3. Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 17 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIES e e eo User Manual e MEAS LT Level amp Pressure Transducer User Manual 6 Question How do attach your vent filter or aneroid bellows to my cable vent tube Answer The vent filter can be mounted anywhere convenient preferably out of the weather It can be mounted in any position and connects to the cable vent tube via the extension tube with metal connector tube provided The aneroid bellows must be mounted in a way that its movement is not encumbered It is provided with a mounting base T Question What is the best way to mark my cable Answer Use white vinyl marking tape available from your local hardware or electronics stores These same stores may also sell cable marking kits Unfortunately we not provide this service 8 Question Any ideas for preventing marine growth on your submersible transducers Answer You might want to try waterproof grease Remove the threaded nose cap to facilitate applying the grease Take care not to damage the diaphragm when applying the grease and not to trap air bubbles against the sensing diaphragm 9 Question How many measurements can you make before the diaphragm on the sensor fails Answer In normal operation millions of cycles We find that sensor failure is rarely due to diaphragm fatigue 10
4. TOP 7 3 Reference Connection Schemes TRANSDUCER CABLE xm EL R VENT FILTER Au OR DD veee AU BELLOWS option p i IMS CRESS tenet NON VENTED VENT FILTER TANKS Submersible Cable Termination ANEROID o BELLOWS TO TRANSDUCER Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 16 of31 1 800 745 8008 WL sales meas spec com User Manual measurement SPECIALTIE SN e e e MEAS LT Level amp Pressure Transducer User Manual Appendix B Frequently Asked Questions 1 Question Answer 2 Question Answer 3 Question Answer 4 Question Answer 5 Question Answer What installation ideas do you have to help me get rid of electrical noise interfering with the signal We strongly encourage you to secure our cable shield to a good earth ground and that you use a 4 20 mA signal output Armed with these precautions and the fact that many of our transducers are CE approved for electromagnetic interference you should have few problems An ounce of prevention goes a long way Either try to eliminate the source of noise or move the transducers as far away from it as possible The cable on the submersible transducer always seems to get cut and damaged What am doing wrong This is the most common problem that our users encounter Make sure that all of your colleagues and staff understand the imp
5. awaits the next surge without having to reset a breaker or replace a fuse The power supply needs to be limited to 150 mA to avoid lock up of the gas tube after a suppression event If a lock up should occur reset by disconnecting and reconnecting power to the circuit Transducers installed with this option have a two year warranty against damage due to voltage surge Please note When using the lightning protection option on 4 20 mA products users should take into account the additional series resistance of this option when selecting the loop power supply This option will increase total loop resistance by 88 Ohms so the supply voltage must be at least 12VDC when lightning protection is installed Measurement Specialties Inc WWww meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 6 of 31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Electrical Outputs We offer the industry standard 0 5 VDC and 4 20 mA outputs In addition we also offer a variety of other voltage output ranges Cable Hanger We can supply an optional cable hanger P N 12 90 0931 to help end users secure the cable The cable hanger can be positioned anywhere on the cable by pushing the ends together Once positioned the cable hanger expands and provides a snug grip on the cable When mounting the transducer in a well casing the cable han
6. depending on the level range of the unit over pressure of the unit is possible In harsh environments where debris is common and ice shifts you might expect damage to both the transducer and cable 16 Question Why would I choose a MEAS transducer versus a competitor Answer Reliable long lasting products Lightning protection lifetime warranty Excellent pre amp post sales application support No hassle service Measurement Specialties Inc 1000 Lucas Way Hampton VA 23666 USA 19 of31 WL sales meas spec com www meas spec com 1 757 766 1500 1 800 745 8008 measurement SPECIALT E 2 e o Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Appendix C Transducer Field Checks The following is a field check procedure for KPSI Level and Pressure Transducers It is designed to provide the information you need to isolate problems that may occur when deploying a transducer These checks will help eliminate the costly and time consuming RMA process by determining in advance whether the transducer is operating properly When a problem is encountered with a transducer it is helpful to test the transducer independently from the rest of the system thereby establishing where to concentrate the troubleshooting effort It is important to determine if the fault lies in the transducer or the instrument reading the transducer signal i e digital panel meter programmable logic controller etc If all of the
7. Question What is the turnaround time on repairs Answer Once we receive a unit into our facility it takes less than 10 working days to complete an evaluation 11 Question What is the longest length of cable you have attached to a submersible transducer Answer Two thousand feet 610 meters 12 Question Why do you use 316 SS housings and sensors for your standard transducers Answer It offers a good combination of corrosion resistance and reasonable cost As Measurement Specialties Inc 1000 Lucas Way Hampton VA 23666 USA 18 of31 1 800 745 8008 WL sales meas spec com www meas spec com 1 757 766 1500 measurement SPECIALTIES e ee User Manual MEAS LT Level amp Pressure Transducer User Manual an option we do offer titanium for more aggressive environments 13 Question What wire gauge should limit myself to when connecting to your 22 AWG wire Answer Use 22 AWG or heavier 14 Question Does it make any difference if mount the transducer in a vertical or horizontal position Answer Yes Our units will experience a certain amount of position sensitivity You should mount it in a vertical position throughout the measurement cycle If you lay the transducer down the user must realize than an offset will occur 15 Question What happens when you freeze your transducer in a column of water Answer We have frozen our transducers in a container of water in a home freezer with no resulting damage However
8. black wire of the transducer Connect the terminal of the meter to the terminal of the power supply with a length of 22AW G or heavier wire Connect the drain wire from the transducer to a good earth ground See Appendix A page 13 for wiring diagram Please refer to Maximum Cable Lengths and Minimum Supply Voltage in Appendix C page 19 to verify minimum loop supply voltage requirements Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 9 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual VDC Wiring Connect a 3 wire VDC output transducer to a typical power supply and the voltmeter connect the terminal of the power supply to the input terminal of the meter with a length of 22 AW G or heavier wire Connect the excitation black lead of the transducer to the input terminal of the meter Connect the input terminal of the meter to the signal lead white of the transducer Connect the terminal of the power supply to the lead red of the transducer Connect the drain wire to a good earth ground See Appendix A page 13 Protective Cage Diaphragm Protector The MEAS LTB and LTR come standard with a field removable diaphragm protector one inch or 25 mm standoff The protective cage diaphragm protector can be removed by loosening six 6 fasteners located on the b
9. clean your transducer s nose piece or diaphragm with any object This could dent or scar the sensor diaphragm and cause permanent damage to the transducer Your transducer may be cleaned in accordance with the procedures listed in step 4 below Cleaning your transducer Materials required e Plastic bowls 8 12 inches 200 300 mm in diameter and 4 6 inches 100 150 mm deep e Supply of clean lint free cleaning rags e Rubber gloves e Mild liquid dishwashing detergent such as Dawn noted for its grease dissolving cleaning capability e Enough clear clean water to fill two of the basins e One 32 ounce bottle of The Works Tub amp Shower Cleaner available commercially through Wal Mart K Mart Target and Ace Hardware stores http www theworkscleans com index htm Preparation e Prior to cleaning your pressure transducer ensure that all procedures have been followed in the proper cleaning of the cable and transducer to remove any biologically and chemically hazardous materials e The vent filter or bellows must be properly attached The cable should be coiled to ensure ease of handling and it must be protected against the possibility of accidental abrasion and or penetration of the cable jacket by sharp objects e A lead length of 1 to 1 feet 0 3 0 45 m of cable from the transducer should be allowed to facilitate handling during cleaning e The protective covering or similar protective device that is shipped
10. following transducer tests deliver normal results the problem may be found elsewhere in your system Below is a simple hookup diagram for the most common types of electrical output a 0 5 VDC and a 4 20 mA transducers The diagram above illustrates the attachment of the meter in series with the black negative signal wire of the transducer using a 12 28 VDC power supply for transducer excitation Some suggested power supplies are e 1 12 VDC automotive or lantern battery e 2 6 VDC lantern batteries connected in series for a total of 12 VDC e 2 9 VDC transistor batteries connected in series for a total of 18 VDC e A laboratory style linear power supply capable of 12VDC minimum VDC OUTPUT 4 20mA OUTPUT BLACK JUHM N MJ 1 1 E NY v lt U UU EN fx o ae ow Gel 8 8 as E m us 45 EE 2 E 3 Bal xe B zo 22 na J e E mS 39 39 I JR mc lt a Si KC Clg a Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 20 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Batteries are suggested to power the transducer during testing to eliminate the possibility that line noise is passing through an improperly filtered grounded or damaged installation power supply The mete
11. full scale range in feet Record the value 3 Multiply the value calculated in step 2 by 16 the transducer span in milliamps 4 Add 4 to the product of step 3 This is the approximate value in milliamps that should be output by the transducer at its current depth Measurement Specialties Inc Www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 27 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTI E S e e User Manual MEAS LT Level amp Pressure Transducer User Manual In order to approximately determine the depth of a transducer in feet using a given value of milliamps 1 Divide the full scale range of the transducer in feet by 16 Record this value 2 Subtract 4 from the milliamp output of the transducer Record this value 3 Multiply the result of step 1 by the result of step 2 This is the approximate depth at which the transducer is sited If the resulting numbers are reasonably close to some verified value for current water depth then the unit is functioning In order to determine the quality of measurement additional steps need to be performed 1 757 766 1500 1 800 745 8008 Measurement Specialties Inc www meas spec com 1000 Lucas Way Hampton VA 23666 USA 28 of31 WL sales meas spec com measurement SPECIALT E 2 e o Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Appendix D Calibration Calculations A cal
12. with each transducer should be attached to the transducer at all times It should only be removed prior to installation or cleaning Your work surface needs to be clean and free of clutter and large enough to accommodate all materials required in addition to the transducer and cable Rubber gloves should be worn when working with The Works cleaner MSDS available from the manufacturer Fill one of the bowls with fresh water one with a mild detergent mixed with water and the last with 16 ounces 0 45 kg of a bath bath tub type cleaner Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 11 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Cleaning Step 1 Immerse the unit in the bowl containing the mild detergent and stir for 20 30 seconds stirring and gently rubbing the exterior casing of the transducer to remove stubborn and built up dirt and grime Remove and thoroughly rinse in the bowl containing the fresh water Rinse and wipe dry Step 2 Holding the body of the transducer with one hand so that you are looking at the retaining screen protecting the sensor carefully remove the sensor nose piece by simply unscrewing it from the transducer body Do not touch the sensor diaphragm with your finger or any other object Also do not attempt to dry the inside portion of the
13. 000 Lucas Way Hampton VA 23666 Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 13 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E 2 e o Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Prior to returning to Measurement Specialties 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 Measurement Specialties website e WWW meas spec com The completed certificate must accompany the transducer when shipped to Measurement Specialties If the transducer has been used in media other than potable water Measurement Specialties customer service must be notified at the same time an RMA number is requested Measurement Specialties reserves the right to reject any shipment deemed to be unsanitary or environmentally unsafe to handle If these guidelines are not met the package will be sent back unopened and at the customer s expense Please include the attached cable vent filter or aneroid bellow with each returned vented gage submersible transducer Measurement Specialties will return warranty items prepaid via UPS GROUND If the customer desires another method of return shipment Measurement Specialties will prepay and add the shipping charges to the repair bill Incoming freight charges are the customer s resp
14. 57 766 1500 1000 Lucas Way Hampton VA 23666 USA 24 of31 1 800 745 8008 WL sales meas spec com User Manual measurement SPECIALTIES ee e e MEAS LT Level amp Pressure Transducer User Manual 7 Symptom Procedure 8 Symptom Procedure 9 Symptom Procedure 10 Symptom Procedure 11 Symptom Readings increase very slowly over time Our cable is shipped coiled and consequently takes time to straighten when installed Attaching a weight to the transducer e g one of our sacrificial anodes will help To prevent cable stretch with lengths greater than 200 feet 60 m secure the Kevlar fibers just under the cable jacket to your junction box or other secure object No electrical output from your transducer Check all electrical connections to ensure they are correct and secure Double check your power supply or use a battery as described previously to ensure the transducer is getting power If all checks OK the problem could be a circuit board or the sensor in your transducer The unit must be returned to the factory for evaluation The most probable cause of this type of failure is damage to the submersible cable jacket allowing water to leak down the cable and into the transducer housing or lightning damage Formation of marine growth on a submersible transducer Certain transducer construction materials for example 316 stainless steel attract marine life snails and algae Clean th
15. O column and is called out as maximum static error 0 176496 FSO The calculation for pressure is illustrated below PSIG Span Output in mA Offset To convert to feet of water Feet H2O PSIG 2 3073 1 757 766 1500 www meas spec com 1 800 745 8008 31 of 31 Measurement Specialties Inc 1000 Lucas Way Hampton VA 23666 USA WL sales meas spec com measurement SPECIALTIE S eeeg e e 100 Lucas Way Hampton VA 23666 USA Office 757 766 1500 Toll Free 800 745 8008 Fax 757 766 4297 WWW meas spec com Email Online orders p
16. a te Sttcnend gxaaeeaneradaceacenaeaunanarnessateee 10 Protective Cage Diaphragm Protector pp 10 Position Sensitivity EE 10 General Maintenance Tips for Submersible Transducers ppp 10 DESICCANT Maintenance pp 10 Clogged Nose Piece or Dirty Diaphragm pp 11 Cleaning your E E 11 PY sates deca teseactte ted edteca esti aanrennen a e eie erniet 11 Cleaning SOS MN T T n ttnt E EEES EEn nnn nnne nn nenn nnmnnn ena 12 Cleaning the Lightning Protection Data Line Protector pp 12 Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 1 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E 2 e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual 4 0 WARRANTY amp PRODUCT RETURN PROCEDURE c eeeeenennn 13 IN deier Eligibility mc U 13 Merchandise Return Procedures 4 13 APPENDIX A DRAWINGS amp DIAGRAMS ee 15 APPENDIX B FREQUENTLY ASKED QUESTIONS 17 APPENDIX C TRANSDUCER FIELD CHECKS A TROUBLESHOOTING 20 APPENDIX D CALIBRATION CALCULATIONS ee 29 Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 2 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual 1 0 Product Des
17. ard warranty or extended two year warranty Units that fall within either age group that do not meet the products specifications and exhibits no obvious physical damage to the housing sensor or cable cuts will be replaced under warranty Merchandise Return Procedures Contact the Applications Support Group or the Customer Service Department at Measurement Specialties Inc Hampton VA if your transducer is not operating properly Our staff is available for troubleshooting at 757 766 1500 or toll free at 1 800 745 8008 during normal working hours Eastern Time If your transducer or accessory needs to be returned to Measurement Specialties obtain a Returned Merchandise Authorization RMA from the Customer Service Department prior to shipment Be prepared to supply the following information when requesting the RMA Part number Serial number Complete description of problems symptoms Bill To and Ship To address Purchase order number not required for warranty repairs Customer contact and telephone number The above information including the RMA number must be on the customer s shipping documents that accompany the equipment to be repaired Measurement Specialties also requests that the outside of the shipping container be labeled with the RMA number to assist in tracking the repairs All equipment should be sent to the following address ATTN MEASLT TRANSDUCER REPAIR DEPARTMENT 7 digit RMA number Measurement Specialties 1
18. be Polyethylene 060 ID Drain wire 1 52 mm 7 32 tinned copper Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 5 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Chemical resistance of polyurethane Potable Water Wastewater Borax Butane Animal Fat Carbonic Acid Citric Acid Cod Liver Oil Corn Oil Glycerin Glycol Mineral Oils Potassium Nitrate Potassium Sulfate Silicone Oils Stoddard Solvent Tannic Acid 10 Tartaric Acid Turbine Oil Chemical resistance of ETFE Acetic Acid Glacial Acetic Anhydride Acetone Aluminum Chloride Anti Freeze Bromine Calcium Chloride Calcium Hydroxide Chlorine Copper Chloride Ferrous Chloride Hydrochloric Acid Ketones Lacquer Thinners Sulfuric Acid The vented cable termination end is specially prepared at the factory to eliminate the potential for moisture migration W here the lead wires emerge from under the jacket there s potting material and a shrink tube boot every effort should be made to leave this feature intact Should the cable be longer than needed for the installation it is recommended that the excess length be accommodated in a service loop and that the potted end of the cable NOT be shortened The cable attached to this instrument is specifically engineered for submersible applications Th
19. ck of the more resistant metal is decreased The 820 Sacrificial Anode is clamped to the exterior of a one inch bore submersible transducer We also offer a 1 diameter pencil anode the 825 that attaches to the MEAS LTA nose cap Sacrificial anodes can only be installed on the LTA Absolute Sealed Gage Transducer The sealed gage option for submersible transducers eliminates the need for a vent filter The standard output of a sealed gauge transducer is 4 mA at 14 70 psia The output of the transducer will need to be adjusted to compensate for the altitude difference with a separate barometric unit if necessary Polyurethane amp ETFE Jacketed Cable Most installations of our submersible level transducers connect our polyurethane or ETFE cable to a junction box From this junction box P N 840 users typically run their own cable to the required instrumentation Polyurethane jacketed cable is used for most applications while ETFE material is recommended for aggressive environments Specifications for our standard polyurethane and ETFE jacketed cable are as follows S ifi Standard Standard pecifications Submersible Cable Non Submersible Wire Weight ag pen 0 07 kg m 0 025 bet 0 035 kg m 0 28 7 10 mm 0 189 4 8 mm 0 31 7 87 mm 0 19 4 9 mm Insulation Conductors ee SC Color coded PVC Outer jacket 36 gauge spiral tinned Aluminum polyester foil copper wire foil shield with facing outward drain wire Vent Tu
20. cription General Characteristics MEAS LT Level and Pressure Transducers use isolated diaphragm sensors that can be used in aggressive applications with hostile fluids and gases These sensors utilize a silicon pressure cell that has been fitted into a stainless steel or titanium package with an integral compliant stainless steel or titanium barrier diaphragm This sensor assembly is housed in a rugged 316 stainless steel or titanium case which provides for a variety of level ranges from 2 3 ft 0 75 m H2O through 692 ft 210 9 m H2O and pressure inputs from 1 psi 7 kPa through 900 psi Our devices feature internal signal conditioning Standard outputs are 4 20 mA and VDC All units containing active electronic components have surge and reverse polarity protection For ease of use in the field our transducers are permanently laser engraved with our logo and name wiring information part number P N serial number S N date of manufacture DOM range excitation and output L T transducers are offered in 1 0 25 mm diameters Care and Handling Our transducers are designed for rugged use However they need protection from over pressure and sharp impact Penetrate the surface slowly vertically and only to the depth necessary when lowering a transducer into a liquid Avoid dropping the unit from above the surface Clean all transducers by rinsing them in a mild detergent Direct probing of the diaphragm or attempts to remove protective sc
21. d the reference vent tube in the cable and is inside the transducer housing This is usually the result of Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 23 of31 1 800 745 8008 WL sales meas spec com User Manual measurement SPECIALTIE SN e e e MEAS LT Level amp Pressure Transducer User Manual 4 Symptom Procedure 5 Symptom Procedure 6 Symptom Procedure not maintaining the desiccant vent filter or of operating the transducer without a desiccant filter or aneroid bellows If caught early enough the transducer can be saved by coiling the cable and transducer in a pan and baking it in an oven at 50 C 122 F for a minimum of 2 hours Be careful that the oven temperature does not exceed 50 C 122 F or both the transducer and the cable can be damaged Alternatively suspend both the cable and transducer in a vertical position with vent tube down overnight to allow water to drain from the transducer and vent tube Transducer suddenly fails during or just after a nearby lightning event This failure is usually caused by overvoltage due to ground transients resulting from a direct or indirect lightning event These transients can travel distances of a mile or more The transducer may be returned to the factory for repair and optional retrofit of our lightning protection system This system carries a lifetime warranty against transducer
22. damage due to lightning Transducer response to pressure level input changes becomes sluggish This is usually a sign that the sensing end of the transducer has become fouled with residue The transducer must be removed from service and the sensing diaphragm cleaned as described in Item 2 warm soapy water If fouling persists the transducer may be replaced with a Series 705 or Series 750 non fouling transducer which is specifically designed for trouble free operation in a high residue environment Output reading is within limits but freezes at one point In certain environments crust may form over the sensing diaphragm preventing the sensor from identifying change in level Removing the transducer from service and cleaning it as described in ltem 2 will generally solve the problem To combat marine growth you might try wrapping the transducer with copper wire similar to that found in wire scouring pads for cleaning dishes Marine growth occurs on the copper and eventually erodes the copper and drops off or the copper is manually removed during routine maintenance Alternatively there are various companies that will impregnate coat the 316 stainless steel with anti fouling chemicals of coatings 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 Measurement Specialties Inc www meas spec com 1 7
23. e polyurethane outer jacket provides long term reliability under most conditions The cable should be handled carefully however as the jacket may be subject to cutting should it be raked over extremely sharp edges To guard against water incursion should an inadvertent minor cut occur we have incorporated an exclusive water block feature immediately beneath the jacket The cable is fully shielded with the shield connected to the metal housing at the transducer end and terminated in a drain wire at the termination or user end The shield should always be terminated to a good earth ground unless the transducer is installed in an area where galvanic corrosion is known to be a serious problem Lightning Protection Lightning and surge protection for VDC and 4 20 mA output are available This is achieved through the use of 2 protectors one is integral to the transducer housing and one is provided for the outside line located at the surface and grounded to a DIN Rail Please remember this option must be factory installed at the time of order entry or as a factory upgrade This option cannot be installed in the field Contact customer service for further details Featuring quick response and low clamping voltages these devices protect against fast rising voltage transients as well as severe current surges associated with lightning discharges up to 20 000 amperes Following a surge the protector automatically restores the line to normal operation and
24. e cable shield drain wire to a good earth ground This will protect the transducer from Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 22 of31 1 800 745 8008 WL sales meas spec com User Manual measurement SPECIALTIE SN e e e MEAS LT Level amp Pressure Transducer User Manual relatively minor transient voltages The only exception to this rule is if high rates of electrolytic corrosion have been previously experienced with grounded submersible devices In this case it may be better to leave the shield disconnected Please note W hen using products with the lightning protection option on 4 20 mA products users should take into account the additional series resistance of this option when selecting the loop power supply This option will increase total loop resistance by 88 Ohms Symptom and Procedures 1 Symptom Procedure 2 Symptom Procedure 3 Symptom Procedure Transducer fails to give output of any kind Isolate the problem to either the transducer or the power supply readout See the Quick Check Procedures above for this check If it can be determined that the transducer is no longer operable remove it from service for further analysis If the transducer output falls within the limits described above the fault lies somewhere else in your system Transducer has failed and has been removed for analysis Inspect the cable for physical dama
25. e transducer diaphragm by soaking it in a bucket of warm water with a non aggressive cleaning solution You can also coat the transducer with marine grease This may be the most effective and inexpensive way to protect your transducer Submersible transducer exhibits corrosion or pitting on body or diaphragm Dissimilar metals for example your transducer housing and your pump housing in an electrolytic environment fluid in your well can lead to galvanic corrosion of the metal that is nearer the anodic end of the galvanic series Likewise a voltage potential between the ground wire of the transducer and the ground of other equipment in the well can lead to galvanic corrosion Installation of a P N 820 or 825 sacrificial anode will help protect your transducer from galvanic corrosion Our sacrificial anodes are made of a zinc alloy that being nearer the anodic end of the galvanic series than the 316 stainless steel or titanium housing of the transducer will corrode before the transducer The transducer is buried in dirt or silt and the readings seem to be Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 25 of31 1 800 745 8008 WL sales meas spec com User Manual measurement SPECIALTIE SN e e e MEAS LT Level amp Pressure Transducer User Manual Procedure 12 Symptom Procedure 13 Symptom Procedure erroneous Use of a piezometer nosepiece i
26. e voltage required by the transducer to operate If this scenario were to occur the transducer would actually stop functioning correctly when its output reached 12 mADC 50 of transducer full scale range In this case the appropriate choice for a load resistor value is 125 Ohms 14 Symptom I have a MEAS LT 4 20mA transducer rated for 7 5 PSIG attached to a pressure source that is outputting 7 5 PSIG With 20VDC being supplied am getting 19 94 mA can t find the upper range allowance for the sensor but this seems low to me Does this mA reading fall into the acceptable range for the transducer with the settings I ve specified Procedure When evaluating a transducer it is sometimes convenient to make some broad generalizations in order to rapidly determine the condition of the unit In general transducers that output a 4 20 mA DC signal have a 16 mA DC span 4 20 16 If the transducers accuracy is reported as being some percentage of its full scale range then the following table could be used in conjunction with the instructional notations to determine whether a more detailed analysis of data quality is required Accuracy Rating Accuracy in mA DC 0 25 FS 0 05 mA 0 10 FS 0 016 mA In order to approximately determine how many milliamps a transducer should output at a given depth 1 Determine the depth in feet at which the transducer is sited 2 Divide the depth value from step 1 by the transducer
27. ellows immediately after transducer installation Failure to use one or the other could result in premature failure of the transducer which would not be covered by warranty f you use a desiccant filter you should establish a regular maintenance schedule You should change your vent filter when it is 7596 spent pink color Replacement filters are available at a nominal cost from the factory Do not remove the old vent filter until a new one is available The most common failure mode of our transducers is moisture and corrosion damage due to lack of use or maintenance of the vent filter This will allow air into the desiccant filter and allows the transducer to properly vent with changes in barometric pressure Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 8 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E 2 e o Qo User Manual MEAS LT Level amp Pressure Transducer User Manual To install replace either the aneroid bellows or the vent filter simply unplug the old unit from the vent tube and plug the 0 062 x 1 stainless steel connector tube supplied with each filter or bellows into the vent tube Installation and mounting instructions are supplied with each aneroid bellows and vent filter The diagram on page 16 shows typical vent filter and aneroid bellows hookups Cable Protection An inexpensive way to protect the cable from damage is to ord
28. er the submersible pressure transducer with a Ye conduit attachment If further protection is needed connect an inexpensive flexible 5 8 garden hose to the conduit fitting with an inexpensive female PVC 1 NPT x 3 4 NHT swivel fitting available at your local hardware store These options are not supplied by MEAS Bending of Cable Our polyurethane and ETFE jacketed cables are quite flexible Care needs to be taken to ensure that when bending the cable to suit your installation you do not crimp the vent tube inside the cable Consequently do not bend the cable more than a radius of 1 inch Cable Compression Many users require a compression fitting to secure our ETFE and polyurethane jacketed cable as it enters a junction box Care needs to be taken that you do not over tighten the fitting so as to damage the cable Compression fittings are not supplied by MEAS 4 20 mA Wiring When connecting a 2 wire 4 20 mA transducer to a typical power supply and mA meter verify that the meter has an input impedance of at least 10 Ohms If you are unsure of the input impedance then a 10 Ohm resistor may be placed in series with the meter and transducer Connect the red lead of the transducer to the terminal of the power supply If the 10 Ohm resistor is required connect it to the black lead of the transducer Use a short length of 22 AW G or heavier wire to connect the terminal of the meter to the resistor if it is required or the
29. eral Installation Procedures The following is important installation and preventive maintenance information Our Customer Service or Applications Engineering Support staff can provide additional instruction Transducer Anchors Most users either suspend our submersible transducers in stilling wells or attach them to rigid conduit This is done to prevent damage to the transducer from shock caused by water turbulence It is not advisable to tie your transducer to a pump or to piping as any problem with the transducer could require that the pump be pulled from the installation This could prove to be very expensive Please refer to the Cable Anchoring Schemes drawing in Appendix A Some applications use our optional bracket P N 49 06 00PC to clamp the transducer to a fixed object i e wall ladder step or require the unit to be suspended without any protective still well or attachment device In all installations care should be taken to ensure no damage occurs to the cable Transducer Submersion Damage to submersible cable is one of the most frequent causes of transducer failure Lower your transducer into the liquid slowly making sure the cable does not drag over sharp edges and only to the depth necessary Avoid dropping the unit from the surface SuperDry Vent Filter Desiccant or Aneroid Bellows Installation For submersible transducers vented gage pressure format only Always install a desiccant vent filter or aneroid b
30. ge Cuts in the cable jacket can result in liquid incursion into the transducer housing which can cause permanent damage If operational the cable can be repaired by using a splice kit P N 830 supplied by Measurement Specialties Inspect the transducer housing It should be intact and free of corrosion If the outer surface of the transducer is pitted this could be an indication of galvanic corrosion caused by stray ground currents If this is the case the transducer will probably require replacement If the external case exhibits none of these characteristics carefully unscrew the nosepiece and look into the pressure sensing end of the transducer The concentric rings of the sensing diaphragm should be visible If they are not it could be that residue has accumulated on the diaphragm preventing it from responding properly to pressure changes 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 pg 10 Under no circumstances should any object or tool be used to remove residue from the sensing diaphragm or else permanent damage will be done f cleaning the diaphragm does not solve the problem the transducer should be returned to the factory for repair or replacement Transducer develops a negative offset and gets worse over time actual level exceeds specified level This may be a sign that moisture has entere
31. ger can be secured to a hook on the well plate or an eye bolt may be attached to the side of the well casing The cable hanger loop is then secured to the eye bolt by using any number of types of fasteners A similar technique can be used when working in stilling wells for surface water level measurement In this case the loop end of the cable hanger can be attached directly to a screw or bolt bored into the still well shelf Submersible Cable Splicing Kit Our field installable cable splice kit P N 830 allows you to splice polyurethane and ETFE submersible cable It is most commonly used for well applications where the more expensive ETFE cable is required for suspension in corrosive media where the liquid level is fairly shallow but the well is hundreds of feet in depth It is also used in emergency situations where cable must be spliced together to get an application up and running Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 7 of 31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual 3 0 Installation amp Maintenance Tips WARNING POTENTIAL ELECTROSTATIC CHARGING HAZARD In hazardous locations e Avoid building up static charge on case of data protector and plastic accessories e Use damp rag to wipe data protector and plastic accessories to avoid static build up Gen
32. ibration report option for each MEAS LT Level and Pressure Transducer is available at time of order This sheet lists the actual values that were output by the transducer when it was being manufactured at several different pressures In addition two coefficients are provided that can be used to calculate the actual depth from any given mA output value These coefficients are derived from a Least Squares Best Fit Straight Line BFSL calibration using the data listed on the datasheet Our accuracy specification is referenced to the line described by the BFSL coefficients and so the transducer may not output exactly 4 mADC at zero pressure and 20 mADC at full scale As an example here is an example of data for a typical transducer Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 29 of31 1 800 745 8008 WL sales meas spec com measurement PECIALT E ege e e eo User Manual e MEAS LT Level amp Pressure Transducer User Manual Calibration Report Test Date 07 12 2012 Test Time 10 31 20 Model No LTABABBASAO005PGO25 Serial No 1206087 Pressure Range 0 00 to 5 00 PSIG Test Temps Room 25 0 DegC Excitation 9 28 VDC Output 4 20 mA PCU Serial No 10833 BFSL 0 eeee Run 1 en Run 2 Target Rm Temp Rm Temp Error Rm Temp Error Test Pressure Outputs Outputs FSO Outputs FSO 0 00 3 9565 3 9768 0 1268 3 9784 0 1369 1 00 7 1435 7 1348 0 0542 7 1361 0 0463
33. l input terminal and the Data Logger signal input terminal e Attach a separate piece of wire between the Data Logger signal input and analog ground In this configuration you will turn your data logger into a milliamp meter The size of your load resistor can be calculated in the following manner e D 0 02 R Where o Data logger input range D o Full scale output of transducer 0 02 A 20 mA o Load Resistor Value R Pick an appropriate standard value Measurement Specialties Inc www meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 26 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual e 250 Ohms results in 1 to 5 VDC at 4 and 20 mADC e 125 Ohms results in 0 5 to 2 5 VDC 500 to 2500 mVDO at 4 and 20mA DC At this point the discussion needs to address IR loss voltage drop in series circuits Note that MEAS LT transducers need a minimum of 9 VDC to operate correctly When the transducer is operating correctly it will output a current which when driven through a resistor will generate some amount of voltage drop If the resistor value is 250 Ohms then the voltage measured across that resistor will be 0 004 A 250 Ohms 1 000 VDC and 0 020 A 250 Ohms 5 VDC Notice that if the available voltage from the data logger is12 VDC then 12 VDC 5 VDC 7 VDC which is less than th
34. measurement amp PBEIIALIIES MEAS LT Level amp Pressure Transducers USER MANUAL 2 EDITION April 2014 measurement SPECIALT E 2 e o Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Table of Contents 1 0 PRODUCT DESSERT IEN eege EEN 3 General CharacteristicS RR uu E 3 Care and Handling m nae eda cnt yi ene axadiacewiatule nanese eneee 3 CANE ANNE EE 3 Leet io ne E eT ees ke ere Ulm torr end tee 3 2 0 PRODUCT ACCESSORIES amp OPTIONS 5 2 asa aaaninn anas cba aa aaa a au eE curare dan aaa nurus 4 Nose Caps amp Pressure Connecllaris pp 4 810 SuperDry Vent Filter or 815 Aneroid Bellows pp 4 Sacrificial e 4 Absolute Sealed Gage Transducer pp 5 Polyurethane amp ETFE Jacketed Cable pp 5 Lightning lg ee g EE 6 EECH 7 sfr P 7 Submersible Cable Splicing Kit EE 7 3 0 INSTALLATION amp MAINTENANCE TIPS ccs ccccceseeeeeeseeeeeeeeseeeeeeseeeeeeeeeeeeeeneenes 8 General Installation Procedures pp 8 Transduc t e e 8 Tranisducer SUDIMG SION E 8 SuperDry Vent Filter Desiccant or Aneroid Bellow Installation 8 rl Nu e NITE ORE 9 Behding or Gables boc i eR lon uite end s D ex enu Dicet Reemi E 9 e E6 nu 9 4 20 MA Wiring 9 KAREN WANG aia sile a seeterce tra eticterea peated t cietemeuntaarcntiete
35. n this application would help This optional nosepiece can be easily installed in the field and features a very fine screen to keep dirt from fouling the diaphragm but allows the diaphragm to sense moisture levels Transducer has an offset error Our submersible transducers perform best when the sensing end is pointing in a downward manner Keep in mind that you can experience offset error due to the position sensitivity or orientation change of the sensor Offset errors are more prominent in low pressure applications with the sensing end of the transducer lying flat or pointing upward am testing a MEAS LT 4 20mA sensor for use with our data logger On page 13 of the MEAS LT Level and Pressure Transducers User Manual see the standard 4 20mA configuration Does the recording channel of my data logger become the mA meter Most data loggers cannot measure current mA directly W hen this is the case a load resistor must be used to convert the current mA output into an appropriate voltage If the User s Manual for your particular instrument does not illustrate a preferred method for recording current mA data then you should attach your transducer signal wires to your data logger in the following manner e Transducer red wire Data Logger Excitation Terminal The minimum excitation for a MEAS LT Transducer is 9VDC e Transducer black wire Data Logger signal input terminal e Attach a Load resistor between the Data Logger signa
36. onsibility The customer is also responsible for shipping charges to and from Measurement Specialties for all equipment not under warranty Once the return is received it typically takes 5 10 working days for the technician to complete a fault determination A 6096 Purchase Order Cancelation fee will be applied when the order is canceled within 24 hours of placement The order cannot be canceled after 24 hours of placement NOTE Expedite premiums and shipping charges are non refundable Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 14 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E 2 Ze o eG User Manual e MEAS LT Level amp Pressure Transducer User Manual Appendix A Drawings and Diagrams Wiring Diagrams for VDC and mA Outputs EXCITATION POWER SUPPLY EXCITATION VDC Configuration COMMON VOLTAGE METER SIGNAL DRAIN WIRE POWER mA SUPPLY METER 4 20 mA Configuration Notes These diagrams depict typical installations Refer to your power supply and instrumentation manufacturer for the specifics of your application Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 15 of31 1 800 745 8008 WL sales meas spec com measurement PECIALT E Se e o Oo User Manual e MEAS LT Level amp Pressure Transducer User Manual Cable Anchoring Schemes CLOSED
37. ortance of handling the cable with care The cable should not be bent around rough or sharp edges Always use a cable reel during transport Where possible suspend the unit in a perforated 2 50 mm PVC pipe and thread the cable through protective conduit to the nearest junction box have an application where the transducer is frequently damaged by voltage spikes What can be done to prevent this At a minimum make sure the cable shield is connected to an earth ground as near as possible to the transducer We can provide a surge protection kit for both our submersible and non submersible transducers See page 4 These kits will handle typical spikes that might come in through the power lines as well as surges that travel through the ground due to nearby lightning strikes How much impact shock can your submersible transducers withstand Our transducers are not shock tested and the lower pressure ranges can be damaged if dropped from several feet onto an unforgiving surface like concrete We recommend that the protective shipping sleeve remain in place until the unit is installed What is the response time of your transducer From initial power up the transducer output will stabilize within a fraction of a second The frequency response is rather low probably less than 1 kHz but it depends on the application the media plumbing etc Call our factory for application assistance if frequency response is critical in your application
38. ottom of the unit Position Sensitivity The transducer should be installed so that the diaphragm located behind the nose cap is oriented in a vertical position otherwise the unit could exhibit an offset General Maintenance Tips for Submersible Transducers Desiccant Maintenance WARNING POTENTIAL ELECTROSTATIC CHARGING HAZARD In hazardous locations e Avoid building up static charge on case of data protector and plastic accessories e Use damp rag to wipe data protector and plastic accessories to avoid static build up If you use a desiccant vent filter you should establish a regular maintenance schedule You should change your vent filter when it is 75 spent pink color Replacement filters are available at a nominal cost from the factory Do not remove the old vent filter until a new one is available Remember that Measurement Specialties improved 810 SuperDry Vent Filter is designed to be effective for at least one year before requiring replacement Low and no maintenance options are also available Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 10 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E 2 e o Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Clogged Nose Piece or Dirty Diaphragm Either of these conditions could result in erroneous readings from your transducer WARNING NEVER attempt to
39. r should be a digital type capable of reading at least 2 digits to the right of the decimal point A second instrument should be available to confirm the observations A handheld Digital Multi Meter DMM capable of reading 4 20 mA of current or 0 20 VDC to a resolution of at least 0 01 decimal places Once your transducer is correctly configured per one of the diagrams orient the transducer in a vertical position with the pressure port down and then read the zero output on your meter For a 0 5 VDC output the zero should be between 0 and 0 25 volts and for a 4 20 mA output between 3 75 and 4 25 mA If the transducer is submersible you may opt to test the unit s response in a container of room temperature water and observe its reaction to liquid pressure It should return to the same zero point when removed If the output is outside of these limits note the results and continue to troubleshoot the transducer per the suggested measurements shown below Case check These checks diagrams on the next page are performed to detect internal shorts either in wiring that might have made contact with the structural components of the transducer or from water intrusion that has made its way to the internal circuit board In either case there should be zero 0 voltage output on the case when the tests below are performed and checked with a Digital Multi meter Further Measurements The following checks to the wiring should be made using a Digital M
40. reens will damage the sensor voiding the warranty Calibration Calibration reports unique for each transducer are optionally available for all MEAS LT transducers and must be ordered at the time of order placement Should you misplace your calibration sheet you may contact the factory and request a duplicate All MEAS LT Transducer calibrations are traceable to the National Institute of Standards and Technology NIST Approvals UL and FM certification for intrinsic safety options are optionally available for MEAS LT transducers Their respective installation control drawings can be downloaded from our website Most products are CE compliant to EN 61326 1 2006 and EN 61326 2 3 2006 CE compliant units are labeled accordingly Units ordered with intrinsic safety are designed for installation in a Class I Division 1 Groups A B C and D Class ll Division 1 Groups E F and G Class Ill Division 1 hazardous location when connected to appropriate apparatus such as those manufactured by R G Stahl Inc and others Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 3 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E 2 e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual 2 0 Product Accessories and Options WARNING POTENTIAL ELECTROSTATIC CHARGING HAZARD In hazardous locations e Avoid building up static charge on case of da
41. s from mildew and prevent the formation of a liquid column in the vent tube Any such liquid column directly affects the instantaneous calibration of the transducer Transducers with accuracy better than 0 25 should only be protected with the 810 vent filter in order to maintain this accuracy Sacrificial Anodes Our sacrificial anodes are made from a special zinc alloy formulated to guarantee continued effectiveness over long periods Because the anodes are 95 galvanic they will not corrode unless there is an electrolytic demand The anode maintains a high driving potential throughout its 12 month life is self sloughing and always exposes new zinc for the best possible protection For those applications where cable buoyancy is a problem the sacrificial anode can be substituted for hanging weights Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 4 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIE SN e Qo User Manual MEAS LT Level amp Pressure Transducer User Manual Sacrificial Anodes provide cathodic protection against galvanic corrosion for our submersible pressure transducers Galvanic corrosion occurs when dissimilar metals are placed in contact with an electrolyte This condition causes a potential difference to exist between the two metals causing electron flow between them Corrosion of the less corrosion resistant metal is increased and atta
42. ta protector and plastic accessories e Use damp rag to wipe data protector and plastic accessories to avoid static build up Nose Caps and Pressure Connections There are several different pressure connection options for the MEAS LT submersible level and pressure transducer product line e The LTA features a ported nose cap Delrin with 8 32UNC 2B threaded hole where weight accessories can be attached e The LTB features a wide mouth non fouling cage protecting a 2 75 PTFE flexible diaphragm e TheLTR features a wide mouth non fouling heavy duty cage protecting a 2 75 PTFE flexible diaphragm e TheLT1 features a 4 18 female NPT pressure connection e TheLT5 features a 4 18 male NPT pressure connection e TheLT7 features a 2 18 male NPT pressure connection WARNING Caution must be exercised when inserting a screw into the nose cap as the maximum insertion length should not exceed 0 175 810 SuperDry Vent Filter or 815 Aneroid Bellows All submersible level transducers and pressure transducers with molded cable attachment require an optional protective barrier that guards against moisture buildup in the cable vent tube The 810 SuperDry vent filter and the 815 Aneroid Bellows are guaranteed to operate maintenance free for one year The 815 Aneroid Bellows can be used on submersibles with accuracies of 0 25 FSO These barriers ensure reliable operation and long life as they protect sensitive electronic component
43. transducer as you risk damaging the pressure sensor Step 3 Place the transducer in the bowl containing The Works solution and gently stir and move the transducer back and forth to thoroughly clean out the sensor portion of the unit Again do not touch the sensor diaphragm with your finger or any other object in an attempt to clean it as you risk damaging the pressure sensors Do this for approximately 15 20 seconds Rinse in the bowl containing clean water and wipe dry the external casing only Place the nose piece in the same solution for 15 20 seconds working to thoroughly clean it out Rinse and wipe dry Step 4 Holding the transducer in a vertical position so that you can see the face of the sensor screw the protective nose piece back into place Cleaning the Lightning Protection Data Line Protector WARNING POTENTIAL ELECTROSTATIC CHARGING HAZARD In hazardous locations e Avoid building up static charge on case of external surge protector and plastic accessories e Use damp rag to wipe data protector and plastic accessories to avoid static build up Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 12 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALTIES e e User Manual MEAS LT Level amp Pressure Transducer User Manual 4 0 Warranty and Product Return Procedure Product Eligibility Units purchased with one year stand
44. ulti Meter to insure that all connection wiring offer the listed resistance levels for proper operation 0 5 VDC Should read 4 20 mA Should read Excitation red to Shield gt 2 5 Mohms Excitation red to Shield gt 2 5 Mohms drain drain Excitation black to Shield gt 2 5 Mohms Excitation black to Shield 2 5 Mohms drain drain Output white to Shield drain gt 2 5 Mohms Shield drain to Housing 2 ohms Shield blue to Housing 2 ohms All measurements outlined here should be recorded and sent to Measurement Specialties We will review it with you and determine if further evaluation is necessary If so an RMA Return Material Authorization number will be established and you will be asked to send the results along with the transducer to assist in the RMA evaluation process Measurement Specialties Customer Service Department can be reached at 800 745 8008 or WL sales meas spec com Measurement Specialties Inc WWw meas spec com 1 757 766 1500 1000 Lucas Way Hampton VA 23666 USA 21 of31 1 800 745 8008 WL sales meas spec com measurement SPECIALT E 2 Se e o Oo User Manual MEAS LT Level amp Pressure Transducer User Manual CASE CHECK VDC OUTPUT CASE CHECK 4 20mA OUTPUT ape BLACK mA OUTPUT METER 1 Y qas SLIHM 8 gt mg Am o e2 o pa 1 lt ES gt 2 m o c E v 4 lddns YAMOd WO

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