Campbell CS451 Product Manual
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Campbell CS451 Product Manual

Submersible pressure transducer
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Revision: 10/2020
Copyright © 2009 – 2020
Campbell Scientific, Inc.

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Summary of Contents for Campbell CS451

  • Page 1 Revision: 10/2020 Copyright © 2009 – 2020 Campbell Scientific, Inc.

  • Page 2: Table Of Contents

    Table of contents 1. Introduction 2. Precautions 3. Initial inspection 4. QuickStart 5. Overview 6. Specifications 7. Installation 7.1 Installation considerations 7.1.1 Vent tube 7.1.2 Appropriate water depth 7.1.3 Dislodge bubbles 7.2 Installing and securing the transducer 7.2.1 Split mesh cable grip 7.2.2 Heyco cable grip 7.3 Wiring 7.3.1 SDI-12 data logger connections...
  • Page 3 8.2 SDI-12 commands 8.3 Measuring multiple SDI-12 sensors 8.4 Unit command 8.5 Sample number command 9. Maintenance 9.1 Every visit 9.2 Every two years 10. Troubleshooting Appendix A. Importing Short Cut code into CRBasic Editor Appendix B. Example program Appendix C. Calibration certificate Appendix D.

  • Page 4: Introduction

    Dropping the instrument or allowing it to “free fall” down a well may damage the transducer. Never suspend the CS451/CS456 from the connections at the top end of the cable. Sharp bends or excessive pinching of the cable can cause damage and may pinch off the vent tube causing measurement errors.

  • Page 5: Initial Inspection

    3. Initial inspection Upon receipt of the CS451/CS456, inspect the packaging for any signs of shipping damage and, if found, report the damage to the carrier in accordance with policy. Also inspect the contents of the package and file a claim if shipping related damage is discovered.
  • Page 6 3. In the Available Sensors and Devices box, type CS451 or locate the sensor in the Sensors > Water > Level & Flow folder. Double-click CS450/CS451/CS455/CS456 Pressure Transducer. Water level defaults to feet and temperature defaults to degrees Celsius. These can be changed by clicking the Water Level or Temperature box and selecting a different option.
  • Page 7 Type the initial water level in the Observed Level Reading box. 6. Repeat steps three and four for other sensors being measured. Click Next. 7. In Output Setup, type the scan rate, Data Output Storage Intervals, and meaningful table names. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 8: Overview

    1.5 s. The transducer can also be configured to output pressure only in less than 1 s. The measurement cycle is activated using SDI-12 or RS-232 commands. The transducer consists of a piezoresistive sensor housed in a 316L stainless-steel (CS451) or titanium (CS456) package to enhance reliability. The rugged construction makes the...
  • Page 9 Nose cones can be switched out later. The nose cones are available separately from Campbell Scientific, allowing the nose cone to be changed to a different style at a later date, if desired.

  • Page 10: Specifications

    Low power sleep state between measurements reduces power consumption Weighted nose cone offered adds 0.2 kg (7.4 oz) to the transducer weight. Additional weight makes submersion of the transducer easier Compatible with Campbell Scientific CRBasic data loggers: CR6, CR3000, CR1000X, CR800 series, CR300 series, CR1000 6. Specifications...
  • Page 11 60 m (200 ft) RS-232: 60 m (200 ft) Cable type: 5 Conductor, 26 AWG Hytrel jacket Body material: CS451 – 316L stainless steel CS456 – titanium Element material: CS451 – 316L stainless steel CS456 – Hastelloy Standard nose cone material: Delrin Length: 213.36 mm (6.875 in)

  • Page 12: Installation

    (p. 2) for a Short Cut tutorial. 7.1 Installation considerations The CS451/CS456 is designed for water level measurements. Typical applications include agricultural water level/flow, water wells, lakes, streams, and tanks. If the device is to be installed in a liquid other than water or in contaminated water, check the compatibility of the wetted material.

  • Page 13: Appropriate Water Depth

    If the bubbles are not removed by rotation and shaking underwater (or bleeding out the air in a closed system), the CS451/CS456 reading will drift lower by the distance of the gap as the air is slowly dissolved into the water over time.

  • Page 14: Installing And Securing The Transducer

    If installing in a well, fasten the cable to the well head. CAUTION: Never suspend the CS451/CS456 from the connections at the top of the cable. Sharp bends or excessive pinching of the cable can cause damage and may pinch off the vent tube causing measurement errors.

  • Page 15: Heyco Cable Grip

    7.2.2 Heyco cable grip To protect your transducer during deployment, Campbell Scientific offers the Heyco cable grip (FIGURE 7-2 (p. 12)) to clamp the transducer to the submerged end of a 1-inch PVC pipe (FIGURE (p. 12)). 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: Sdi-12 Data Logger Connections

    For the CR6 and CR1000X data loggers, triggering conflicts may occur when a companion terminal is used for a triggering instruction such as TimerInput(), PulseCount(), or WaitDigTrig(). For example, if the CS451 is connected to C3 on a CR1000X, C4 cannot be used in the TimerInput(), PulseCount(), or WaitDigTrig() instructions.

  • Page 17: Sdi-12 Programming

    1. Use a staff gage (or other device) to measure the initial elevation of water. 2. Measure the water pressure using the CS451/CS456. 3. Convert the pressure measurement to water level. 4. Subtract the CS451 level measurement from the initial elevation measurement. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 18: Changing Nose Cones

    For example, if the correct elevation of the water, as measured by a staff gage or other measurement device, is 20 feet, and the CS451 provides a reading of 5.76 psig, then: 5.76 psig • 2.31 ft/psig = 13.3056 ft.

  • Page 19: Operation

    SDI-12 Sensors | Transparent Mode.) 8.1.1 Computer connection using the A200 The A200 or another device is required to connect the CS451/CS456 to a computer. This allows sensor settings to be changed using the Device Configuration Utility. 8.1.1.1 Driver installation If the A200 has not been previously plugged into your computer, the A200 driver needs to be loaded onto your computer.

  • Page 20: A200 Wiring

    The A200 provides power to the sensor when it is connected to a computer USB port. An internal DC/DC converter boosts the 5 VDC supply from the USB connection to a 12 VDC output is required to power the sensor. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 21: Determining Which Com Port The A200 Has Been Assigned

    Computer connection using the A200 (p. 16)). After installing Device Configuration Utility and connecting the transducer to the computer, select CS451 from the Device Type list on the left column of the screen. In the Communication Port box, select the COM port that was assigned to the A200 (see Determining which COM port the A200 has been assigned (p.

  • Page 22: Sdi-12 Commands

    SDI-12 Sensors | Transparent Mode. (p. 20). When using an M! The CS451/CS456 supports the commands that are listed in Table 8-3 command, the data logger waits for the time specified by the sensor, sends the D! command, pauses its operation, and waits until either it receives the data from the sensor or the sensor timeout expires.
  • Page 23 D! command on the next pass through the program. Another measurement request is then sent so that data are ready on the next scan. Table 8-3: CS451/CS456 SDI-12 commands SDI-12 command Values returned or function...
  • Page 24 Table 8-3: CS451/CS456 SDI-12 commands SDI-12 command Values returned or function Units (a is the sensor address) aM8! or aC8! 1. Pressure/Level Configured Settings. 2. Temperature Provides average of data based on user selected samples. Number of samples are entered with the aXCONFIG2=nnn! command.

  • Page 25: Measuring Multiple Sdi-12 Sensors

    8.3 Measuring multiple SDI-12 sensors Campbell Scientific recommends using separate terminals when possible. However, multiple CS451/CS456 sensors or other SDI-12 sensors can be connected to a single data logger control or U terminal. Each SDI-12 device must have a unique SDI-12 address. See SDI-12 sensor support 30) for more information.

  • Page 26: Sample Number Command

    “Declaration of Hazardous Material and Decontamination” form and comply with the requirements specified in it. Refer to the Assistance page for more information. Campbell Scientific recommends that the CS451/CS456 be factory recalibrated and checked every 24 months. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 27: Every Visit

    If the cable is damaged, send the sensor to Campbell Scientific for repairs. Periodic evaluation of the desiccant is vital for keeping the vent tube dry. The CS451/CS456 ships with the desiccant tube attached. To assess the effectiveness of the desiccant, use one of the following: Desiccant in the tube changes color from orange to green when the drying power is lost.

  • Page 28: Troubleshooting

    1 foot of water level. If the desiccant chamber has not been properly maintained, water may have condensed in the vent tube and the device should be returned to the factory for service. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 29: Appendix A. Importing Short Cut Code Into Crbasic Editor

    Block. This adds an apostrophe (') to the beginning of each of the highlighted lines, which instructs the data logger compiler to ignore those lines when compiling. The Comment Block feature is demonstrated at about 5:10 in the CRBasic | Features video CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 30: Appendix B. Example Program

    Appendix B. Example program CRBasic Example 1: CS451 SDI-12 program for CR1000X data logger 'CR1000X Series 'Declare Variables and Units FRun Changed Public BattV Public PTemp_C Public CS451(2) Public Observed Public Lvl_corr Public Offset Alias CS451(1)=Lvl_ft Alias CS451(2)=Temp_C Units BattV=Volts...
  • Page 31 CRBasic Example 1: CS451 SDI-12 program for CR1000X data logger 'Default CR1000X Data Logger Battery Voltage measurement 'BattV' Battery (BattV) 'Default CR1000X Data Logger Wiring Panel Temperature measurement 'PTemp_C' PanelTemp (PTemp_C,60) 'CS451 Pressure Transducer measurements 'Lvl_ft' and 'Temp_C' SDI12Recorder (Lvl_ft,C1, "0"...

  • Page 32: Appendix C. Calibration Certificate

    This value is listed as a percentage of the full scale range of the sensor. When a CS451/CS456 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 33: Appendix D. Sdi-12 Sensor Support

    An active sensor responds to each command. Responses have several standard forms and always terminate with <CR><LF> (carriage return and line feed). Standard SDI-12 commands are listed Table D-1 (p. 31). NOTE: The CS451/CS456 does not support all variants of the commands in the following table. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 34: Acknowledge Active Command (A!)

    Table D-1: Campbell Scientific sensor SDI-12 command and response set Response Name Command Acknowledge Active a<CR><LF> allccccccccmmmmmmvvvxxx...xx Send Identification <CR><LF> Start Verification atttn <CR><LF> Address Query a<CR><LF> aAb! Change Address b<CR><LF> Start Measurement atttn<CR><LF> aM1!...aM9! aMC! Start Measurement atttn <CR><LF>...

  • Page 35: Start Verification Command (Av!)

    A sensor address is changed with command aAb!, where a is the current address and b is the new address. For example, to change an address from 0 to 2, the command is 0A2!. The sensor responds with the new address b, which in this case is 2. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 36: Start Measurement Commands (Am!)

    The sensor will not issue a service request to notify the data logger that the measurement is complete. The data logger will issue the aD0! command during the next scan after the measurement time reported by the sensor has expired. CS451/CS456 Submersible Water-Level Recording Sensor...
  • Page 37 After 20 seconds have passed, the data logger starts ZD0! the process of collecting the data by issuing the first D command to sensor Z. Sensor Z immediately responds with the sensor Z+1+2+3+4+5+6+7+8+9+10<CR><LF> address and the 10 values. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 38: Start Measurement Commands With Cyclic Redundancy Check (Amc! And Acc!)

    D.1.10 Send data command (aD0! … aD9!) The Send Data command requests data from the sensor. It is issued automatically with every type of measurement command (aM!, aMC!, aC!, aCC!). When the measurement command is aM! CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 39: Extended Commands

    System operators can manually interrogate and enter settings in probes using transparent mode. Transparent mode is useful in troubleshooting SDI-12 systems because it allows direct communication with probes. Data logger security may need to be unlocked before activating the transparent mode. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 40: Changing An Sdi-12 Address

    Transparent mode is entered while the computer is communicating with the data logger through a terminal emulator program. It is accessed through Campbell Scientific data logger support software or other terminal emulator programs. Data logger keyboards and displays cannot be used.

  • Page 41: Changing An Sdi-12 Address - Cr200(X) Series

    CR1000. D.2.2 Changing an SDI-12 address — CR200(X) Series 1. Connect a single SDI-12 sensor to the CR200(X). 2. In LoggerNet Connect, under data logger, click Terminal Emulator. The terminal emulator window opens. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 42: References

    FIGURE D-2. CR200(X) example of using the SDI-12 transparent mode to change the SDI- 12 address from 0 to 1 D.3 References SDI-12 Support Group. SDI-12: A Serial-Digital Interface Standard for Microprocessor-Based Sensors – Version 1.4. River Heights, UT: SDI-12 Support Group, 2017. http://www.sdi- 12.org/current_specification/SDI-12_version-1_4-Dec-1-2017.pdf. CS451/CS456 Submersible Water-Level Recording Sensor...

  • Page 43: Appendix E. Rs-232 Connection Via Computer Terminal Software

    None Stop bits Flow control None You will now be able to communicate with the CS451/CS456. At the prompt, press the <Enter> key several times. This will wake-up the RS-232 mode of the sensor. Table E-2 (p. 41) shows the RS-232 commands that can be entered once it is in the RS-232 mode.
  • Page 44 Serial number, DR(ohms), Rb(ohms), temperature (°C), element serial number, product name Copyright information, OS version and date, serial number, element serial number, product name, user defined name (station name), SDI-12 address H or h Help menu CS451/CS456 Submersible Water-Level Recording Sensor...
  • Page 45 See Product Details on the Ordering Information pages at www.campbellsci.com. Other manufacturer's products, that are resold by Campbell Scientific, are warranted only to the limits extended by the original manufacturer.
  • Page 46 Campbell Scientific office serves your country. To obtain a Returned Materials Authorization or Repair Reference number, contact your CAMPBELL SCIENTIFIC regional office. Please write the issued number clearly on the outside of the shipping container and ship as directed.
  • Page 47 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 48 Campbell Scientific regional offices Australia France Thailand Location: Garbutt, QLD Australia Location: Vincennes, France Location: Bangkok, Thailand Phone: 61.7.4401.7700 Phone: 0033.0.1.56.45.15.20 Phone: 66.2.719.3399 Email: info@campbellsci.com.au Email: info@campbellsci.fr Email: info@campbellsci.asia Website: www.campbellsci.com.au Website: www.campbellsci.fr Website: www.campbellsci.asia Brazil Germany Location: São Paulo, SP Brazil...

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