Campbell CRS451 Product Manual
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Campbell CRS451 Product Manual

Submersible water-level recording sensors
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Revision: 09/2019
Copyright © 2013– 2019
Campbell Scientific, Inc.

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Summary of Contents for Campbell CRS451

  • Page 1 Revision: 09/2019 Copyright © 2013– 2019 Campbell Scientific, Inc.
  • Page 2 Limited warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI, but that are resold by CSI, are warranted only to the limits extended by the original manufacturer.
  • Page 3 Campbell Scientific reserves the right to refuse service on products that were exposed to contaminants that may cause health or safety concerns for our employees.
  • Page 4 Periodically (at least yearly) check electrical ground connections. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR...

  • Page 5: Table Of Contents

    6.2 Avoiding freezing conditions 6.3 Dislodge bubbles 6.4 Well installation 6.5 Other installations 6.6 Battery voltage reading 6.7 Memory 6.8 Attaching suspension cable to CRS451/CRS456 6.9 Heyco cable grip 7. Programming 7.1 Settings 7.2 Connect to the CRS451/CRS456 7.3 Configure CRS45X for measurements 7.4 Compensating measurements for barometric pressure...
  • Page 6 Appendix A. Calibration certificate Appendix B. Conversion to units of measurement Table of Contents - v...

  • Page 7: Introduction

    This frees users to place the sensor in remote sites and let it store data for long periods of time. The CRS451/CRS456 supports standard time- based scanning and recording along with event-based recording based on water level change (Delta) or logarithmic time sequence for pump and slug tests.

  • Page 8: Ships With

    This measurement cycle can be as fast as 1 second. The design features a piezoresistive sensor housed in a 316L stainless steel (CRS451) or titanium (CRS456) package to enhance reliability. The rugged construction makes the CRS451/CRS456 suitable for water level measurement in irrigation applications, water wells, lakes, streams, and tanks.

  • Page 9: Specifications

    Distance from pressure sensor interface (black line etched on housing) to: End of NPT fitting: 2.54 cm (1 in) End of standard nose cone: 2.3 cm (0.9 in) End of weighted nose cone: 9.9 cm (3.9 in) CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 10 Overpressure: 2x pressure range Dry storage temperature: –30 to 80 °C Operating temperature: 0 to 60 °C CAUTION: Freezing conditions may damage the CRS451/CRS456 (see Avoiding freezing conditions (p. 6) for more information). Body Material CRS451: 316L Stainless Steel CRS456:...

  • Page 11: Installation

    The CRS451 is a sealed gage sensor and when not submerged will read approximately 1 bar at sea level and less as elevation increases. The CRS451 is calibrated at nine pressures starting at 0.6 bar up to full scale referenced to 1 bar. Points below 1 bar are used in the calibration for the benefit of those who deploy this sensor at elevations above sea level.

  • Page 12: Avoiding Freezing Conditions

    If the bubbles are not removed by rotation and shaking underwater (or bleeding out the air in a closed system), the CRS451/CRS456 reading will drift lower by the distance of the gap as the air is slowly dissolved into the water over time.

  • Page 13: Battery Voltage Reading

    6.6 Battery voltage reading The voltage of the lithium ion battery used in the CRS451/CRS456 will abruptly decrease at the end of the battery’s useful life, which makes predicting remaining battery life difficult by measuring battery voltage alone. Knowing the energy consumption of the CRS451/CRS456 while...

  • Page 14: Attaching Suspension Cable To Crs451/Crs456

    6.8 Attaching suspension cable to CRS451/CRS456 Attach the split ring to the CRS451/CRS456 cap. CRS451/CRS456 Submersible Water-Level Recording Sensor...

  • Page 15: Heyco Cable Grip

    6.9 Heyco cable grip To protect your transducer during deployment, Campbell Scientific offers the Heyco cable grip (FIGURE 6-1 (p. 9)) to clamp the transducer to the submerged end of a 1-inch PVC pipe (FIGURE (p. 10)). The PVC pipe will help protect the sensor and cable from debris and disturbances while also providing a more secure means of anchoring the sensor to minimize movement.

  • Page 16: Programming

    7.1 Settings Before connecting to the CRS451/CRS456, you can change the sensor name or the appearance of HydroSci screens by clicking on Settings at the upper right portion of the HydroSci screen. CRS451/CRS456 Submersible Water-Level Recording Sensor...

  • Page 17: Connect To The Crs451/Crs456

    7.2 Connect to the CRS451/CRS456 1. Select CRS45X from the left margin. 2. Select appropriate COM Port. 3. If you have not made a USB connection to your computer, click on the Show Connect Instructions and Device Installation drop-down arrow.

  • Page 18: Configure Crs45X For Measurements

    This offset takes effect at the Start Time—which is set in a subsequent screen—so it is necessary that this sensor be in its permanent measurement position before the Start Time, otherwise the offset correction will not be correct. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 19 If desired, select time in future when measurements should cease. c. Select the rate at which measurements will be made. This does not configure the sensor for data storage, only the rate at which measurements are made. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 20 6. Select and Name Data Tables for Datalogging. a. Up to four different Data Tables can archive data at independent intervals with any combination of elements (samples, averages, maximum, etc). b. Contents of the Data Table are selected in the next screen. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 21 8. Once the Data Tables have been configured, the configuration process is finished and the Finish button can be selected. 9. Once the configuration is complete, it must be copied to the CRS451/CRS456 before it will take effect. Click on Apply Configuration to CRS45X to start this process.

  • Page 22: Compensating Measurements For Barometric Pressure

    This option allows you to save the configuration file for future reference or for easy use in other similarly deployed sensors. The CRS451/CRS456 is calibrated to pressure units in psi. Table B-1 (p. 32) contains the conversion factors used to convert psi to depth of water.

  • Page 23: Using An Additional Crs45X

    (p. 12)). 7.4.2 Using a barometer The barometric pressure data from a nearby Campbell Scientific weather station or other Campbell Scientific monitoring platform can also be used to compensate for barometric pressure. The Data tab is used to process and merge the data file from the test sensor with the data file from the barometric reference sensor.
  • Page 24 3. Press the browse button next to the Barometric Pressure Reference Data File field to browse the data files from the barometric reference sensor. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 25 The reference column must be a measurement of pressure or level. If from a nearby Campbell Scientific weather station, note that the reference column must have units associated with it. The units can be any pressure or level units as defined in HydroSci and they must match exactly the HydroSci abbreviation as shown here.
  • Page 26 7. Once the corrected data file has been built, press the View Corrected Data File button to open the file in View. The View Data button at the bottom of the screen can also be used to open View. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 27 Multiple columns can be added by holding the Ctrl key and dragging the mouse pointer over the column headings. To see the graph, press the Graph button. The graph will then appear on a new screen. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 28 An example of the measured data and the barometric pressure compensated data is shown here. The original data are shown in blue and the compensated data are shown in red. The barometric pressure sensor data are shown below, also in blue. CRS451/CRS456 Submersible Water-Level Recording Sensor...

  • Page 29: Maintenance

    8. Maintenance Campbell Scientific recommends that the CRS451/CRS456 be factory recalibrated every 24 months. Before a CRS451/CRS456 is sent to Campbell Scientific, the customer must get an RMA (returned material authorization) number and fill out the Declaration of Hazardous Material and Decontamination form.

  • Page 30: Battery Replacement

    8.3 Battery replacement A video that describes CRS451/CRS456 battery replacement is available at: www.campbellsci.com/videos/crs451crs456-sensors-battery-replacement. Remove the set screws on the cap end of the CRS451/CRS456. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 31 Gently pull the end out of the housing. Unplug the connecter. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 32 Gently pull the battery out the end. Disconnect the battery. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 33 Remove the battery. Slide in the new battery. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 34 Plug in the new battery. Slide the battery into the housing. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 35 Gently slide the end piece with its O-rings into the housing. CAUTION: Nicking the O-ring could result in a leak. Line up the holes and insert the set screw. Do not over tighten the set screw. CRS451/CRS456 Submersible Water-Level Recording Sensor...

  • Page 36: Troubleshooting

    Damage to diaphragm due to excessive pressure Atmospheric pressure not subtracted from pressure reading Problem: Unit will not respond when attempting USB communications. Suggestion: Replace battery. Correct COM Port used for communication not selected in HydroSci. CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 37 This value is listed as a percentage of the full scale range of the sensor. When a CRS451/CRS456 is returned to Campbell Scientific for calibration, the sensor will be returned with an Instrument Data Report. This report will include values in the Pressure Before [kPa] column.
  • Page 38 (p. 32) provides the conversion factors used to convert psi to other units. For example, 1 psi = 2.30666587369 ft. Table B-1: PSI conversion factors Unit of measurement Factor of conversion Feet 2.3066587369 Inches 27.679904843 Meters 0.1019716213 Millimeters 101.9716213 CRS451/CRS456 Submersible Water-Level Recording Sensor...
  • Page 39 INFO Global Sales & Support Network A worldwide network to help meet your needs Australia Costa Rica Southeast Asia Garbutt, QLD Australia San Pedro, Costa Rica Bangkok, Thailand Location: Location: Location: 61.7.4401.7700 506.2280.1564 66.2.719.3399 Phone: Phone: Phone: info@campbellsci.com.au info@campbellsci.cc thitipongc@campbellsci.asia Email: Email: Email:...

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