CS451/CS456 Submersible Pressure Transducer Revision: 1/13 C o p y r i g h t © 2 0 0 9 - 2 0 1 3 C a m p b e l l S c i e n t i f i c , I n c .
Warranty “PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding Campbell pricelist or product manual. Products not manufactured, but that are re-sold by Campbell, are warranted only to the limits extended by the original manufacturer.
Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing in countries served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs for customers within their territories. Please visit www.campbellsci.com to determine which Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA), contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000.
Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction .................................................................1 2. Cautionary Statements...............................................1 3. Initial Inspection .........................................................1 4. Quickstart ....................................................................2 4.1 4.2 4.3 4.4 4.5 4.
Table of Contents 7.4 Programming ..................................................................................... 20 7.4.1 CRBasic Programming............................................................... 21 7.4.1.1 Example Program for CR200(X)-Series Datalogger ....... 21 7.4.1.2 Example Program for CR1000 Datalogger..................... 22 7.4.2 Edlog Programming ................................................................... 22 7.4.2.1 Example Program for CR10(X) Dataloggers..................
CS451/CS456 Submersible Pressure Transducer 1. Introduction The CS451/CS456 Submersible Pressure Transducer provides pressure and temperature measurements. It uses the SDI-12 or RS-232 communications protocols to communicate with an SDI-12 or RS-232 recorder simplifying installation and programming. The -L in the transducer’s model name indicates user-specified cable length. Before using the CS451/CS456 please study • • • 2. 3.
CS451/CS456 Submersible Pressure Transducer 4. • The model number and pressure range is etched on the housing and the cable length is printed on the label near the connection end of the cable. Check this information against the shipping documentation to ensure that the expected product was received. • The transducer comes with a desiccant tube attached to the cable.
CS451/CS456 Submersible Pressure Transducer 4.3 Step 3 — Dislodge Bubbles While submersing the transducer, air bubbles may become trapped between the pressure plate and the water surface, causing small offset errors until the bubbles dissolve. Dislodge these bubbles by gently shaking the CS451/CS456 while under water. 4.
CS451/CS456 Submersible Pressure Transducer 4.6 Step 6 — Use SCWin to Program Datalogger and Generate Wiring Diagram The simplest method for programming the datalogger to measure a CS451/CS456 is to use SCWin. 4 1. Open Short Cut and click on New Program then select Next. 2. Select a datalogger and scan interval then select Next.
CS451/CS456 Submersible Pressure Transducer 3. Select CS451/CS456 Pressure Sensor, click the right arrow to add it to the list of sensors to be measured, then select Next. 4. Select Offset Calculation then select lvl_ft for the Linked Level and enter the initial water level in the Observed Level Reading box. Enter initial water elevation here 5. Choose the outputs and then select Finish. 6. In the Save As window, enter an appropriate file name and select Save. 7.
CS451/CS456 Submersible Pressure Transducer 8. NOTE 5. Click on Wiring Diagram and wire according to the wiring diagram generated by SCWin Short Cut. Refer to Section 7, Operation, for wiring, offset calculation, and programming information if not using SCWin Short Cut. Overview The CS451/CS456 Submersible Pressure Transducer is designed to provide a reliable, accurate pressure/level measurement that is fully temperature compensated.
CS451/CS456 Submersible Pressure Transducer The CS451/CS456 has two communication options: SDI-12 or RS-232. The CS451/CS456 is shipped from the factory with both communications options enabled; there is no configuration required. As an SDI-12 sensor, the CS451/CS456 is shipped with an address of 0. Two values are output by the CS451/CS456—pressure/level and temperature. The CS451/CS456 is shipped from the factory to output pressure in psig and temperature in degrees Celsius.
CS451/CS456 Submersible Pressure Transducer 6. Specifications Features: • Output acceptable for recording devices with SDI-12 or RS-232 capability including Campbell Scientific dataloggers • Quality construction that ensures product reliability • Rugged stainless steel or titanium case that protects piezoresistive sensor • Fully temperature compensated • Low power sleep state between measurements that reduces power consumption • Weighted nose cone offered that adds 0.2 kg (7.
CS451/CS456 Submersible Pressure Transducer CAUTION Overpressure: 2x pressure range Dry Storage Temperature: ─10° to 80°C Sensor will be damaged if it is encased in frozen liquid. Operating Temperature: 0° to 60°C Temperature Accuracy: ±0.
CS451/CS456 Submersible Pressure Transducer 7. Operation 7.1 Configuration The CS451/CS456 is configured at the factory with default settings: TABLE 7-1. Factory Settings SDI-12 Address 0 RS-232 Baud Rate 9600 Pressure/Level Units PSIG Temperature Units Celsius Communicating with the CS451/CS456 requires the sensor to be either connected to a PC or to an SDI-12 recorder. The sensor typically connects to a PC via the A200 sensor to PC interface.
CS451/CS456 Submersible Pressure Transducer 7.1.1.3 Powering the Sensor The A200 provides power to the sensor when it is connected to a PC’s 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. 7.1.1.4 Determining which COM Port the A200 has been Assigned When the A200 driver is loaded, the A200 is assigned a COM port number.
CS451/CS456 Submersible Pressure Transducer 7.1.2 Device Configuration Utility (version 2.03 or higher) The Device Configuration Utility allows you to change the settings of the CS451/CS456. Device Configuration Utility is shipped on the Campbell Scientific ResourceDVD included with the CS451/CS456. To use Device Configuration Utility, the transducer needs to be connected to the PC via the A200 (see Section 7.1.1, PC Connection Using the A200).
CS451/CS456 Submersible Pressure Transducer Transparent mode is entered while the PC is in telecommunications with the datalogger through a terminal emulator program. It is most easily accessed through Campbell Scientific datalogger support software, but is also accessible with terminal emulator program. To enter the SDI-12 transparent mode, enter Terminal Emulator from LoggerNet, PC400 or PC200W datalogger support software. A terminal emulator screen is displayed. Click the Open Terminal button.
CS451/CS456 Submersible Pressure Transducer Now check for response from the sensor with address zero by typing the SDI12 Identify command 0I! (that’s a zero, not the letter O). The sensor should respond with an identification string similar to: 013CSI450.Std.01_xxxxxxxx, where xxxxxxxx represents the eight digit serial number. Note that the SDI-12 standard allows for multiple probes to be connected to one datalogger control port.
CS451/CS456 Submersible Pressure Transducer FIGURE 7-4. Terminal Emulator TABLE 7-4.
CS451/CS456 Submersible Pressure Transducer TABLE 7-5. SDI-12 Commands SDI-12 Command Command Function Values Returned aM! Configured settings Pressure/Level, Temperature aM1! PSIG, °C Pressure, Temperature aM2! PSIG, °F Pressure, Temperature aM3! kPa, °C Pressure, Temperature aM4! kPa, °F Pressure, Temperature aM5! Sensor’s Serial Number Serial Number aM6! Ohms, ohms, °C ΔR, Rb, Temperature aM7! Configured settings (provides data in less than 0.
CS451/CS456 Submersible Pressure Transducer address. If additional control ports are not available, then the address will need to be changed. 7.1.5.2 Extended SDI-12 Commands Extended SDI-12 commands can be used to configure the CS451/CS456 data output and sample number. These commands are used to select the temperature units (Celsius or Fahrenheit), pressure/level units (psig, kPa, bar, feet, meter, inches, or millimeter), and the integration time for each measurement.
CS451/CS456 Submersible Pressure Transducer 7.2 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. The CS456 should be used in harsh water applications, including salt water. 7.2.
CS451/CS456 Submersible Pressure Transducer 7.2.3 Split Mesh Cable Grip (pn 25431) The 25431 Split Mesh Cable Grip is recommended for use in wells to center the cable and to provide a method of suspending the cable-reducing cable stretch. FIGURE 7-5 shows a transducer’s cable suspended using the split mesh cable grip. FIGURE 7-5. Transducer suspended with split mesh cable grip 7.3 Wiring NOTE Power down your system before wiring the CS451/CS456.
CS451/CS456 Submersible Pressure Transducer 7.3.1 SDI-12 TABLE 7-6. SDI-12 Wiring Color CS451/CS456 Function CR800 CR5000 CR3000 CR1000 CR200(X) Series CR510 CR23X CR10X Red +12VDC 12V Battery+ 12V Black Power Ground G G G White SDI-12 Signal *Control Port C1/SDI-12 Control Port Blue GND GND G G Yellow GND GND G G Clear Shield GND G G *dedicated SDI-12 port on CR5000 7.3.2 RS-232 TABLE 7-7. RS-232 Wiring 7.
CS451/CS456 Submersible Pressure Transducer 7.4.1 CRBasic Programming Dataloggers that use CRBasic include our CR200(X)-series, CR800, CR850, CR1000, CR3000, and CR5000. These dataloggers use the SDI12Recorder() to read the CS451/CS456. A multiplier of 1.0 and an offset of 0.0 yield water level in psig and temperature in degrees C. The SDI12Recorder() instruction has the following form: SDI12Recorder(Destination, Output String, Multiplier, Offset) 7.4.1.
CS451/CS456 Submersible Pressure Transducer 7.4.1.
CS451/CS456 Submersible Pressure Transducer 7.4.2.1 Example Program for CR10(X) Dataloggers Below is a portion of a CR10X program that measures the CS451/CS456. NOTE The instructions below do not store data in final storage. Instruction 92, Instruction 77 and processing instructions such as Instruction 70 are required to store the data permanently.
CS451/CS456 Submersible Pressure Transducer 8.1 8.2 • The desiccant in the tube changes color from blue to pink when the drying power is lost. • The Enclosure Accessory Humidity Indicator Card (pn 28878).
CS451/CS456 Submersible Pressure Transducer Suggestion: A kinked or plugged vent tube will not effectively vent a gauge pressure (Vented) type of device. Normal changes in barometric pressure will appear as water level fluctuations and these types of errors are typically on the order of 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.
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Appendix A. Calibration Certificate Each CS451/CS456 has been calibrated to meet printed accuracy specification at multiple temperature and pressure ranges. If additional verification is required, a Calibration Certificate can be purchased for each CS451/CS456 Submersible Pressure Transducer. The Instrument Data Report provides a list of the pressure and temperature at which the sensor was tested. Pressure [kPa] is the pressure applied (listed in kilopascals) to the sensor.
Appendix A.
Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA) PO Box 8108 Garbutt Post Shop QLD 4814 AUSTRALIA www.campbellsci.com.au • info@campbellsci.com.au Campbell Scientific do Brazil Ltda.
