CS475, CS476 and C477 Radar Water Level Sensor Revision: 1/10 C o p y r i g h t © 2 0 0 9 - 2 0 1 0 C a m p b e l l S c i e n t i f i c , I n c .
Warranty and Assistance The CS475, CS476, and CS477 RADAR WATER LEVEL SENSOR is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products.
CS475, CS476, CS477 Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. Overview.......................................................................1 2. Specifications ..............................................................2 3. Installation....................................................................4 3.1 3.2 3.3 3.4 General Safety Instructions.........................
CS475, CS476, CS477 Table of Contents 7.2 Diagnostics and Repair .......................................................................... 20 7.2.1 No Measured Value Available - Error E013 ................................ 20 7.2.2 No Measured Value Available - Error E041, E042, E043 ........... 20 7.2.2.1 Exchange Electronics Module ............................................ 20 7.3 Maintenance........................................................................................... 23 Appendices A.
CS475, CS476, and CS477 Radar Water Level Sensor 1. Overview The CS475, CS476, and CS477 are radar ranging sensors typically used for water-level applications. They emit short microwave pulses and then measure the elapsed time between the emission and return of the pulses. The elapsed time measurement is used to calculate the distance between the sensor face and the target (e.g., water, grain, slurry). The distance value can then be used to determine depth.
CS475, CS476, and CS477 Radar Water Level Sensor FIGURE 1-1. CS475, CS476, and CS477 2. Specifications 2 Measurement Range CS475: CS476: CS477: 2 inch to 65 ft (50 mm to 20 m) 2 inch to 98 ft (50 mm to 30 m) 16 inch to 229 ft (400 mm to 70 m) Accuracy CS475 (20 inch to 65 ft): CS476 (20 inch to 98 ft): CS477 (20 inch to 230 ft): ±0.2 inch (±5 mm) ±0.1 inch (±3 mm) ±0.6 inch (±15 mm) Resolution: 0.
CS475, CS476, and CS477 Radar Water Level Sensor Radar Unit Frequency: ~26 GHz Electromagnetic Compatibility: Emission to EN 61326; Electrical Equipment Class B Pulse Energy: 1 mW maximum Beam angle CS475: CS476, CS477: 10° (3-in dia horn) 8° (4-in dia horn) Power Requirements Input Voltage: Surge Protection: 9.6 to 16 Vdc 1.5 KVA Typical Current Drain with 12 V power supply Sleeps: 4.
CS475, CS476, and CS477 Radar Water Level Sensor 3. Installation 3.1 General Safety Instructions Observe standard regulations and guidelines while installing and operating the radar sensors. You should follow country-specific installation standards, prevailing safety regulations, accident prevention rules, and this manual’s safety instructions. Depending on the model, the emitting frequencies of these radar sensors are either in the C or K band range.
CS475, CS476, and CS477 Radar Water Level Sensor (A) 3 (C) 8 10 2 1 4 9 5 11 (B) 3 2 6 4 7 12 (D) 13 14 5 15 FIGURE 3-1. Components and Hardware (see Table 3-1 for description of labels) TABLE 3-1.
CS475, CS476, and CS477 Radar Water Level Sensor 3.4 Installation Recommendations Before installing the radar sensor, you must consider all the suggested guidelines for site and maintenance issues. Do not attempt to install the sensor unless you are qualified to perform the installation. The sensor is designed for safe operation in accordance with the current technical, safety and ANSI standards.
CS475, CS476, and CS477 Radar Water Level Sensor TABLE 3-2. Radiation Beam Spread for CS475 (10° Beam Angle) Distance in Meters Diameter of Footprint in Meters 1 0.18 5 0.87 10 1.76 15 2.64 20 3.53 TABLE 3-3. Radiation Beam Spread for CS476/CS477 (8° Beam Angle) Distance in Meters Diameter of Footprint in Meters 1 0.14 5 0.70 10 1.41 15 2.11 20 2.81 30 4.216 70 (CS477 only) 9.84 8. Be aware that bridges contract and expand with temperature changes.
CS475, CS476, and CS477 Radar Water Level Sensor hex nut indicate which direction the lobes extend the least. Orient the sensor such that one of the marks is aligned towards the wall or pier (see Figure 3-2 and Table 3-4). CS475 CS476/CS477 2 1 FIGURE 3-2. Polarization Markings (see Table 3-4 for label descriptions) TABLE 3-4. Description of Polarization Markings Labels Sensor Description 1 CS475 Polarization marks are designated by the mounting loop screws.
CS475, CS476, and CS477 Radar Water Level Sensor 4. Wiring 4.1 Datalogger Connection As shipped from Campbell Scientific, the sensor is fitted with a cable for connection with the datalogger. Appendix A describes replacing this cable. Connections to Campbell Scientific dataloggers are given in Table 4-1. When Short Cut is used to create the datalogger program, the sensor should be wired to the channels shown on the wiring diagram created by Short Cut. Connect the wires in the order shown in Table 4-1.
CS475, CS476, and CS477 Radar Water Level Sensor 5. Configuration 5.1 Default Settings In most circumstances, the default settings (see Table 5-1) should be used. Refer to Appendix B for other setting options and SDI-12 commands. TABLE 5-1. Default Settings Setting Default Setting SDI-12 Address 0 (You only need to change this if two sensors are connected to the same port; valid addresses are 0 through 9, A through Z, and a through z.
CS475, CS476, and CS477 Radar Water Level Sensor radar sensor then emits the short microwave pulses. Any echo occurring 0.5 m (1.6 ft) short of the distance you entered will be considered noise. To start false echo learn, do the aXSFEL+nnn.nnn! command (where nnn.nnn = the actual distance to the water) followed by the aD0! (Send Data) command. Table 5-2 shows an example of the command and response. TABLE 5-2. Example of a Start False Echo Learn Command Initial Command Response 0XSFEL+2.
CS475, CS476, and CS477 Radar Water Level Sensor TABLE 5-3. Example for Setting Water Stage Initial Command Response 0XSS+7.010! 00011 Where (from left to right), Where (from left to right), 0—sensor’s address; 0—sensor’s address; 7.010—the initial water depth value used to calculate subsequent stage measurements 001—the amount of time (in seconds) that you must wait before sending the send data command; 1—the number of values that will be placed in the buffer.
CS475, CS476, and CS477 Radar Water Level Sensor The SDI12Recorder instruction has the following parameters: Dest The Dest parameter is a variable in which to store the results of the measurement. Dest must have enough elements to store all the data that is returned by the sensor or a 'variable out of range' error will result during the execution of the instruction. SDIPort The SDIPort parameter is the port to which the SDI-12 sensor is connected.
CS475, CS476, and CS477 Radar Water Level Sensor ‘Define a data table for 60 minute maximum and minimums DataTable (Hourly,True,-1) DataInterval(0,60,Min,10) Maximum(1,Distance,FP2,0,0) Minimum(1,Distance,FP2,0,0) Average(1,Distance,FP2,False) StdDev(1,Distance,FP2,False) Maximum(1,Stage,FP2,0,0) Minimum(1,Stage,FP2,0,0) Average(1,Stage,FP2,False) StdDev(1,Stage,FPs,False) Sample (1,Error_Code,UINT2) EndTable ‘Read sensor every 60 seconds BeginProg Scan(60,sec,1,0) ‘Code for SDI-12 measurements: SDI12Recor
CS475, CS476, and CS477 Radar Water Level Sensor NOTE Edlog allocates only one of the input locations needed for this instruction. Three input locations are required for this sensor. The additional input locations must be inserted manually using the Input Location Editor. For information on manually inserting input locations, refer to Manually Inserting Input Locations in the Edlog help. 6.2.1 Example Program Below is a portion of a CR10X program that measures the radar sensor.
CS475, CS476, and CS477 Radar Water Level Sensor 7. Diagnostics, Repair, and Maintenance 7.1 Testing Procedure The test procedures for the sensor require the following steps: 1. Double check all wiring connections. 2. Connect the sensor to your datalogger and apply +12V power. 3. Compare the Output Stage versus the Actual Stage using the Start Measurement command followed by the Send Data command (see Section 7.1.1) 4. Send the Acknowledge Active command (see Section 7.1.2).
CS475, CS476, and CS477 Radar Water Level Sensor • Distance--the distance between the sensor and water surface. This value will be reported in either meters or feet, depending on the Units setting. • Diagnostic Values—an error code. For example, Code 0 = OK, Code 13 = error E013 (see Section 7.2). TABLE 7-1.
CS475, CS476, and CS477 Radar Water Level Sensor • Manufacturer’s Model Number: PS61 (CS475), PS62 (CS476), or PS63 (CS477) • Three Digit Firmware Version Number. • Eight Digit Serial Number of Sensor. TABLE 7-3. Send Identification Command Initial Command Response aI! a13VEGAbbbbPS6233212345678 Where (from left to right), a—sensor address 13—SDI-12 compatibility number VEGA = manufacturer’s Name PS62=Manufacturer’s Model Number 3.32Sensor Version Number = Serial Number = 12345678 7.1.
CS475, CS476, and CS477 Radar Water Level Sensor Table 7-4 shows an example of checking the CRC. TABLE 7-4. Checking CRC Example Initial Command Response 0V! 00013 where 0=the sensor’s address Where (from left to right), 0—sensor’s address; 001—the amount of time (in seconds) that you must wait before sending the send data command; 3—the number of values that will be placed in the buffer.
CS475, CS476, and CS477 Radar Water Level Sensor 7.2 Diagnostics and Repair The radar sensor is extremely reliable, but problems can occur during operation. Most of these problems are caused by the following: • Sensor • Environmental Conditions • Power Supply • Signal Processing When you encounter a problem with the radar sensor, check the error messages from the aM!, followed by the aD0! command to help evaluate the issue. NOTES 1.
CS475, CS476, and CS477 Radar Water Level Sensor The electronics module is replaced by doing the following steps (see Figure 71 and Table 7-5): NOTE 1. Unscrew the housing cap (cap is not shown in Figure 7-1). 2. Remove all wires that are attached or plugged into the electronics and note their location for reassembly. 3. Loosen the two (2) screws “A” securing the electronics to the housing. These screws are captive screws and will remain nested with the electronics. 4.
CS475, CS476, and CS477 Radar Water Level Sensor 2 3 3 4 1 5 FIGURE 7-1. Changing the Electronics (see Table 7-5 for label descriptions) TABLE 7-5.
CS475, CS476, and CS477 Radar Water Level Sensor 7.3 Maintenance The sensors are maintenance free under normal operation.
CS475, CS476, and CS477 Radar Water Level Sensor 24
Appendix A. Replacing the Cable The sensor is fitted with a cable for connection to the dataogger. The following procedure is for replacing the original cable (see Figure A-1 and Table A-1). 1. Unscrew the housing side compartment screw cap. 2. Loosen the cord grip on the cable entry. 3. Remove approximately 4 inches (10 cm) of the cable mantle. 4. Strip approximately 0.4 inches (1 cm) of the insulation from the end of the individual wires. 5.
Appendix A. Replacing the Cable (A) 1 (B) 18 17 16 2 15 14 13 3 (C) (D) 4 7 6 12 5 8 9 11 10 FIGURE A-1. Connecting the Instrument Housing (see Table A-1 for description of labels) TABLE A-1.
Appendix B. Entering SDI-12 Commands/Changing Settings The SDI-12 commands are entered using the 25616 Adjustment/Display Module or the terminal emulator in LoggerNet or PC400. These commands are also used in CRBasic or Edlog programming (see Section 6). During normal communication, the datalogger sends the address, together with a command, to the sensor. The sensor then replies with a “response”. SDI-12 command codes that are used with the radar sensor are listed in Table B-1.
Appendix B. Entering SDI-12 Commands/Changing Settings TABLE B-1.
Appendix B. Entering SDI-12 Commands/Changing Settings B.1 Changing Settings B.1.1 Query/Set the Address Valid addresses are 0 to 9; A through Z; and a through z. The factory default address is set to 0. The address can be verified by sending the sensor the Address Query command (see Table B-2). TABLE B-2. SDI-12 Command for Querying the Address Initial Command Response ?! a Where a is the current address of the sensor.
Appendix B. Entering SDI-12 Commands/Changing Settings B.1.3 Set Water Conditions The Set Water Conditions command adapts the sensor to different water conditions. There are four different settings: • 0 (custom setting) • 1 (smooth--typical peak to trough of wave < 4”) • 2 (medium--typical peak to trough of wave < 8”) • 3 (rough--typical peak to trough of wave > 8”) The factory default water conditions are set to 1, which is smooth.
Appendix B. Entering SDI-12 Commands/Changing Settings • 0 (OFF—this mode is typically not recommended; sensor is completely off until a new set power command is received) CAUTIONThe OFF power mode should only be used by advanced users who want to turn the sensor off for extended time periods. In this mode the sensor is completely off and only responds to a new set power command. The factory default Power Operation Mode is 1 (ON).
Appendix B.
Appendix C. FCC/IC Equipment Authorization (USA/Canada only) The CS475, CS476, and CS477 are FCC approved. Modifications to the sensors must have express agreement from Campbell Scientific. Any modifications not approved by Campbell Scientific will cause the expiration of the operating license issued by the FCC/IC. The radar sensor is in conformity with Part 15 of the FCC directives and fulfills the RSS-210 regulations.
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 444 Thuringowa Central QLD 4812 AUSTRALIA www.campbellsci.com.au • info@campbellsci.com.au Campbell Scientific do Brazil Ltda.
