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Measurement Computing KPSI Manual

Level and pressure transducers
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KPSI
®
User's Manual
22nd Edition
October 2014

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Summary of Contents for Measurement Computing KPSI

  • Page 1 KPSI ® User’s Manual 22nd Edition October 2014...

  • Page 2: Table Of Contents

    KPSI Analog Manual 22 Edition Table of Contents Product Description ............2 General Characteristics ............2 Care and Handling............... 2 Calibration ................3 Approvals ................3 Product Accessories and Options ........4 Nose Caps................4 Stainless Steel, SuperDry™ Vent Filters or Aneroid Bellows 5 Sacrificial Anode..............

  • Page 3: Product Description

    KPSI Analog Manual 22 Edition Product Description General Characteristics KPSI™ Level and Pressure Transducers use isolated- diaphragm sensors that are specifically designed for use 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.

  • Page 4: Calibration

    Make sure you keep each calibration report. However, should you misplace your calibration sheet, contact the factory and request a duplicate. All KPSI™ Transducer calibrations are traceable to the National Institute of Standards and Technology (NIST).

  • Page 5: Product Accessories And Options

    KPSI Analog Manual 22 Edition Product Accessories and Options WARNING: POTENTIAL ELECTROSTATIC CHARGING HAZARD In hazardous locations: ● Avoid building up static charge on case of data protector and plastic accessories. ● Use damp rag to wipe data protector and plastic accessories to avoid static build up.

  • Page 6: Stainless Steel, Superdry™ Vent Filters Or Aneroid Bellows

    Edition 810 SuperDry™, 811 Stainless Steel Vent Filters or 815 Aneroid Bellows All KPSI™ submersible transducers with vented gauge format are supplied with a protective barrier that guards against moisture buildup in the cable vent tube. The 810 SuperDry™ vent filter is installed free of charge and is guaranteed to operate maintenance free for one year.

  • Page 7: Absolute/Sealed Gage Transducer

    KPSI Analog Manual 22 Edition 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.
  • Page 8 KPSI Analog Manual 22 Edition Most installations of our submersible level transducers connect our polyurethane or ETFE cable to a junction box. From this junction box, users typically run their own cable to the required instrumentation. Polyurethane-jacketed cable is used for most applications while ETFE material is recommended for more aggressive environments.
  • Page 9 KPSI Analog Manual 22 Edition Chemical resistance of polyurethane: Potable Water, Wastewater, Borax, Butane, Animal Fat, Carbonic Acid, Citric Acid, Cod Liver Oil, Corn Oil, Diesel Fuel, Glycerin, Glycol, Mineral Oils, Potassium Nitrate, Potassium Sulfate, Sea Water, Silicone Oils, Sodium Hydroxide, Stoddard Solvent, Tannic Acid (10), Tartaric Acid, Turbine Oil.

  • Page 10: Lightning Protection

    KPSI Analog Manual 22 Edition The cable attached to this instrument is specifically engineered for submersible applications. The 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”...

  • Page 11: ½" Male Npt Conduit Fitting

    KPSI Analog Manual 22 Edition 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 awaits the next surge without having to reset a breaker or replace a fuse.

  • Page 12: Reverse Signal Output

    KPSI Analog Manual 22 Edition Reverse Signal Output For some applications, it is important to know how far the water is from the top of the tank or the surface of the ground. If specified by the customer, our factory can set...

  • Page 13: Submersible Cable Splicing Kit

    KPSI Analog Manual 22 Edition When mounting the transducer in a well casing, the cable hanger 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...

  • Page 14: Installation & Maintenance Tips

    KPSI Analog Manual 22 Edition Installation & Maintenance Tips WARNING: POTENTIAL ELECTROSTATIC CHARGING HAZARD In hazardous locations: ● Avoid building up static charge on case of data protector and plastic accessories. ● Use damp rag to wipe data protector and plastic accessories to avoid static build up.

  • Page 15: Transducer Submersion

    KPSI Analog Manual 22 Edition Some applications use an optional bracket 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.

  • Page 16: Cable Protection

    KPSI Analog Manual 22 Edition ® The KPSI 811 Stainless Steel Vent Filter is housed in a 316 stainless steel body containing desiccant to provide vent tube moisture protection for a minimum ® of five years without maintenance. A Gore-Tex filter plug provides the vent filter with atmospheric pressure reference.

  • Page 17: Cable Compression

    KPSI Analog Manual 22 Edition 6. 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.

  • Page 18: Models 745/750

    The nominal atmospheric pressure at the location is calculated and the transducer will be ranged accordingly. Not all KPSI™ Transducers are available in a sealed pressure format. Please refer to the appropriate datasheet for availability. 11. Position Sensitivity The transducer should be...

  • Page 19: General Maintenance Tips

    KPSI Analog Manual 22 Edition General Maintenance Tips for Submersible Transducers 1. Desiccant Maintenance WARNING: POTENTIAL ELECTROSTATIC CHARGING HAZARD In hazardous locations: ● Avoid building up static charge on case of data protector and plastic accessories. ● Use damp rag to wipe data protector and plastic accessories to avoid static build up.

  • Page 20: Cleaning Your Transducer

    KPSI Analog Manual 22 Edition Your transducer may be cleaned in accordance with the procedures listed in step 4, below. 3. Cleaning your transducer Materials required: • (3) Plastic basins 8-12 inches (200-300 mm) across and 4-6 inches (100 - 150 mm) deep •...
  • Page 21 KPSI Analog Manual 22 Edition The protective covering (or similar protective device) that is shipped 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...
  • Page 22 KPSI Analog Manual 22 Edition Step 3: Place the transducer in the bowl containing “The Works®” solution, and gently stir for approximately 15-20 seconds. Rinse in the bowl containing clean water and wipe dry the external casing only. Place the...

  • Page 23: Warranty And Product Return Procedures

    Edition Warranty and Product Return Procedure KPSI™ products are warranted for a period of two years commencing from the date of shipment to the original purchaser to be clear of title, free from defects in material and workmanship, and in conformity with product specifications.

  • Page 24: Restocking Policy

    KPSI Analog Manual 22 Edition 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...
  • Page 25 KPSI Analog Manual 22 Edition completed certificate must accompany 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.

  • Page 26: Appendix A Drawings And Diagrams

    KPSI Analog Manual 22 Edition Appendix A Drawings and Diagrams Wiring Diagram VDC, mA, and Temp Output ......26 Cable Anchoring Schemes ............27 Reference Connection Schemes ..........28 Submersible Cable Termination ..........28 Measurement Specialties, Inc. 1-757-766-1500 1000 Lucas W ay, Hampton, VA 23666 USA...

  • Page 27: Wiring Diagram Vdc, Ma, And Temp Output

    KPSI Analog Manual 22 Edition Wiring Diagram VDC, mA, and Temp Output Note: 1. These diagrams depict typical installations. Refer to your power supply and instrumentation Manufacturer for the specifics of your application. Measurement Specialties, Inc. 1-757-766-1500 1000 Lucas W ay, Hampton, VA 23666 USA...

  • Page 28: Cable Anchoring Schemes

    KPSI Analog Manual 22 Edition Cable Anchoring Schemes Measurement Speclatles, Inc. 1-757-766-1500 1000 Lucas Way, Hamr:ton, 23666 1-800-745-8008...

  • Page 29: Reference Connection Schemes

    KPSI Analog Manual 22 Edition Reference Connection Schemes Submersible Cable Termination Measurement Specialties, Inc. 1-757-766-1500 1000 Lucas W ay, Hampton, VA 23666 USA 1-800-745-8008...

  • Page 30: Appendix B Frequently Asked Questions

    KPSI Analog Manual 22 Edition Appendix B Question: What installation ideas do you have to help me get rid of electrical noise interfering with the signal? Answer: An ounce of prevention goes a long way. Either try to eliminate the source of noise or move the transducer as far away from it as possible.
  • Page 31 KPSI Analog Manual 22 Edition Question: I have an application where the transducer is frequently damaged by voltage spikes. What can be done to prevent this? Answer: At a minimum, make sure the cable shield is connected to an earth ground as near as possible to the transducer.
  • Page 32 KPSI Analog Manual 22 Edition Question: How do I 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...
  • Page 33 KPSI Analog Manual 22 Edition 10. 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...
  • Page 34 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 KPSI Transducer versus a competitor? Answer: Reliable, long lasting products Rapid delivery Lightning protection lifetime warranty Excellent pre &...

  • Page 35: Appendix C Field Checkout & Troubleshooting Techniques

    Edition Appendix C Troubleshooting Techniques Quick Check Procedure The following is a quick field checkout procedure for KPSI Level and Pressure Transducers. It will be referred to throughout the troubleshooting section. Should a problem be encountered with a transducer or...
  • Page 36 KPSI Analog Manual 22 Edition the values do not change for VDC output but the values for mA are between 3.80 and 4.20 mA. If the output is outside of these limits, you may, at your option, choose to troubleshoot...
  • Page 37 KPSI Analog Manual 22 Edition supply for transducer excitation. Some suggested power supplies are: • 1 - 12 VDC automotive battery. • 2 - 6 VDC lantern batteries connected in series (for a total of 12 VDC). • 2 - 9 VDC transistor batteries connected in series (for a total of 18 VDC).
  • Page 38 KPSI Analog Manual 22 Edition 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.
  • Page 39 KPSI Analog Manual 22 Edition 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: When using products with the lightning...
  • Page 40 KPSI Analog Manual 22 Edition 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.
  • Page 41 KPSI Analog Manual 22 Edition Symptom: Transducer develops a negative offset and gets worse over time (actual level exceeds specified level). Procedure: This may be a sign that moisture has entered the reference (vent) tube in the cable and is inside the transducer housing.
  • Page 42 KPSI Analog Manual 22 Edition 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 damage due to lightning. Symptom: Transducer response to pressure/level input changes becomes sluggish.
  • Page 43 KPSI Analog Manual 22 Edition 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.
  • Page 44 KPSI Analog Manual 22 Edition 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.
  • Page 45 KPSI Analog Manual 22 Edition 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...
  • Page 46 Edition 13. Symptom: I am testing a Series 700 4-20mA sensor for use with our data logger. On page A-2 of the KPSI Level and Pressure Transducers User's Manual, I see the standard 4-20mA configuration. Does the recording channel of my data...
  • Page 47 KPSI Analog Manual 22 Edition 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 milliammeter. The size of your load resistor can be calculated in the following manner.
  • Page 48 KPSI Analog Manual 22 Edition 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...
  • Page 49 KPSI Analog Manual 22 Edition 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.
  • Page 50 KPSI Analog Manual 22 Edition 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. In order to approximately determine the depth of a transducer (in feet) using a given value of milliamps: 1.

  • Page 51: Appendix D Calibration Calculations

    Appendix D Calibration Calculations Measurement Specialties ships a calibration sheet with every KPSI™ Transducer. 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.
  • Page 52 KPSI Analog Manual 22 Edition Measurement Specialties, Inc. 1-757-766-1500 1000 Lucas W ay, Hampton, VA 23666 USA 1-800-745-8008...
  • Page 54 ™ 1000 Lucas Way, Hampton, VA 23666 USA Phone 757-766-1500, Fax 800-745-8008 E-mail WL.sales@meas-spec.com www.meas-spec.com online orders www.LevelandPressure.com...

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