Campbell Wintersense SDI-12 Product Manual
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Campbell Wintersense SDI-12 Product Manual

Non-invasive surface temperature sensor
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Wintersense SDI-12
Non-Invasive Surface Temperature Sensor
Revision: 01/2023
Copyright © 2023
Campbell Scientific
CSL I.D - 1398

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Summary of Contents for Campbell Wintersense SDI-12

  • Page 1 Wintersense SDI-12 Non-Invasive Surface Temperature Sensor Revision: 01/2023 Copyright © 2023 Campbell Scientific CSL I.D - 1398...
  • Page 2 Quotations for repairs can be given on request. It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment, in support of this policy a “Declaration of Hazardous Material and Decontamination”...
  • Page 3 About this manual Please note that this manual was originally produced by Campbell Scientific Inc. primarily for the North American market. Some spellings, weights and measures may reflect this origin. Some useful conversion factors: Area: 1 in (square inch) = 645 mm Mass: 1 oz.
  • 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 ATTACHMENTS TO TRIPODS AND TOWERS...

  • Page 5: Table Of Contents

    Table of contents 1. About Wintersense SDI-12 2. Precautions 3. Initial inspection 4. QuickStart 5. Overview 6. Technical specifications 7. Site installation 7.1 Wiring 7.2 Programming 7.2.1 CRBasic programming 7.2.2 SDI-12 measurements 7.2.3 Identify measurement and measurement parameter commands 7.3 Install bracket 7.4 Installation height and angle 8.
  • Page 6 B.1.6 Start measurement commands (aM!) B.1.7 Start concurrent measurement commands (aC!) B.1.8 Start measurement commands with cyclic redundancy check (aMC! and aCC!) 33 B.1.9 Stopping a measurement command B.1.10 Send data command (aD0! … aD9!) B.1.11 Continuous measurement command (aR0! … aR9!) B.1.12 Extended commands B.2 SDI-12 transparent mode B.2.1 Changing an SDI-12 address...

  • Page 7: About Wintersense Sdi-12

    Follow local regulations. See Compliance in Technical specifications (p. 6). IMPORTANT: Maintain a level of calibration appropriate to the application. Campbell Scientific recommends factory recalibration of the Wintersense SDI-12 every 1 year when installed within 100 km of a coast, otherwise every 2 years.

  • Page 8: Initial Inspection

    3. Initial inspection Upon receipt of the Wintersense SDI-12, inspect the packaging and contents for damage. File any damage claims with the shipping company. The model number and cable length are printed on a label at the connection end of the cable.
  • Page 9 4. Click the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after wiring the sensor. 5. Repeat steps three and four for other sensors. Click Next. Wintersense SDI-12...
  • Page 10 6. In Output Setup, type the how often to measure the sensors (scan rate), meaningful table names, and Data Output Storage Interval.For this sensor, Campbell Scientific recommends measurement scans of 10 seconds or more. NOTE: When the scan rate is less than 20 seconds the Wintersense SDI-12 will be measured using a concurrent command.

  • Page 11: Overview

    8. Select the output options. 9. Click Finish and save the program. Send the program to the data logger if the data logger is connected to the computer. 10. If the sensor is connected to the data logger, check the output of the sensor in the data display in LoggerNet, RTDAQ, or PC400 to make sure it is making reasonable measurements.

  • Page 12: Technical Specifications

    Monitor troublesome areas, such as bridge decks Ideal for multiple uses, including roads, parking lots, cycleways, and sidewalks 6. Technical specifications Road surface temperature Measurement range: –40 to 70 °C (–40 to 160 °F) Accuracy –40 to 60 °C: ±0.5 °C Resolution: 0.01 °C Air temperature Measurement range: –40 to 70 °C (–40 to 160 °F) Accuracy:...

  • Page 13: Site Installation

    Response time (to M!): Sensor warm-up time: If power is switched allow 3 seconds for warm up before taking a measurement Dimensions, excluding band clamp (length x height x depth): 350 x 200 x 100 mm (13.8 x 7.9 x 4.0 in) Weight: 1.4 kg (3 lb) Supply voltage:...

  • Page 14: Wiring

    Power ground C and U terminals are automatically configured by SDI12Recorder(). If multiple SDI-12 sensors are connected to a data logger, Campbell Scientific recommends using separate terminals when possible. However, multiple SDI-12 sensors can connect to the same data logger control or U terminal. Each must have a unique SDI-12 address. Valid addresses are 0 through 9, a through z, and A through Z.

  • Page 15: Crbasic Programming

    data logger program exclusively with Short Cut. If your data acquisition needs are more complex, the files that Short Cut creates are a great source for programming code to start a new program or add to an existing custom program. NOTE: Short Cut cannot edit programs after they are imported and edited in CRBasic Editor.
  • Page 16 logger retrieves the data with the D! command on the next scan. Another measurement request is then sent so that data are ready on the next scan. Wintersense SDI-12 supports cyclic redundancy checks (CRC) to enhance error detection. See Start measurement commands with cyclic redundancy check (aMC! and aCC!) (p.
  • Page 17 (sec) a14CampbellWtrSen SN=nnnnn SDI-12 address: a SDI-12 version: 14 (version 1.4) vendor: Campbell model: WtrSen SN = Serial number (5 digits) 1. Hardware version 1. N/A 2. Status 2. 0 = no error 1 = contact...

  • Page 18: Identify Measurement And Measurement Parameter Commands

    7.2.3 Identify measurement and measurement parameter commands Version 1.4 compliant sensors must respond to identify commands for each type of measurement command and each parameter with a command. The identify commands return how many variables will be returned with a given measurement command and the time it will take the sensor to respond, without the time penalty of actually taking the measurement.

  • Page 19: Install Bracket

    Table 7-3: Identify commands for the Wintersense SDI-12 SDI-12 command Description Sensor response Comment aIM_004!, … Identify measurement TR = SHEF CODE for a, TD, C aIMC_, aIC_, aICC_ parameters Temperature, dew point aIM_005!, … Identify measurement a, angle, deg aIMC_, aIC_, aICC_ parameters aIM_006!, …...

  • Page 20: Installation Height And Angle

    5. Insert the other bolt through the slot on the main sensor bracket and screw into other hole on the C-bracket. 6. Secure C-bracket to main sensor bracket using a 13 mm (0.5 in) spanner, wrench, or socket. 7.4 Installation height and angle Installation height and angle affect the surface measurement area.
  • Page 21 Installation parameters: Angle 45° Sensor setback (B) 3 m (10 ft) Sensor height (H) 4.6 m ( 15 ft) Lane width 3 m (10 ft) Calculated target dimensions: Distance to target (D) 6.5 m (21.4 ft) Target coverage area (A) (66 ft Major (long) diameter (L) 3.4 m (11.2 ft) Minor (short) diameter (S)

  • Page 22: Maintenance

    µm. Therefore, if site restrictions dictate that an installation angle of greater than 45° is required, the Wintersense SDI-12 sensor will be less prone to errors from reflected radiation than other non-invasive sensors without these optical filters. To adjust the sensor angle, slightly loosen both bolts in the bracket to allow rotation of the sensor around the bolt that is fitted in the round hole towards the front of the sensor.

  • Page 23: Clean The Sensor

    Recommended equipment and supplies: 8 mm (5/16 in) hex tool or slotted screwdriver (not supplied) for adjusting band clamp 13 mm (1/2 in) spanner, wrench, or socket to allow sensor angle adjustment Clean lint-free cloths Air duster Cotton buds or swabs Electronics-grade alcohol 8.1 Clean the sensor Wintersense SDI-12 smart sensors are designed to be low maintenance.

  • Page 24: Replace The Temperature And Humidity Element

    8.2 Replace the temperature and humidity element Replace the temperature and humidity element every 1 to 2 years to ensure accurate measurements. The element is pre-calibrated; so, changing the element will return the system to factory calibration accuracy. A replacement filter cap is supplied with the element; fit it to ensure adequate air flow to the sensor element.

  • Page 25: Replace Sensor Element

    Figure 8-3. Exposed sensor element after filter cap has been removed 8.2.1 Replace sensor element Campbell Scientific offers a replacement temperature/RH element and cap for the Wintersense SDI-12. The replacement element is only available from Campbell Scientific. It includes a small circuit board that is coated to ensure longer life at high humidity. A single row of four gold pins inserts into one side of an eight-way socket at the end of the sensor.
  • Page 26 1. Wash your hands to avoid getting dirt or grease on the element. If possible, use cotton gloves and handle the element by the edges of the small circuit board. Avoid touching the square white filter on the surface of the small, black component on top of the circuit board. CAUTION: If dirt, salt, or grease are left on the face of the sensor element during the process of handling the element, it may influence the measurements made.

  • Page 27: Updating The Operating System (Os)

    5. Grasp the sensor body to ensure you are at the same electrical potential as the element. Hold the edge of the circuit board between your fingertips and pull the element out of the socket. Store the old element in electrostatic protective packaging if you wish to retain it. CAUTION: Avoid pink-coloured electrostatic bags as they can emit chemicals which change the calibration of the sensor.
  • Page 28 CR350-Series OS 1 or newer CR300-Series OS 10.05 or newer The XLOADOS OS update process requires access to the data logger terminal mode. Campbell Scientific Device Configuration Utility is recommended. Although this update may be performed remotely, if the sensor is not communicating with the data logger, it must first be power cycled to regain communication and accept the new OS.
  • Page 29 Click the Send button and select the WINTERSENSE_nnn.xobj file from the C:\Campbellsci\Lib\OperatingSystems directory. File type needs to be changed to All Files (*.*) for the .xobj file to show up on the list. Verify that the .xobj file is now on the data logger CPU drive. 3.

  • Page 30: Troubleshooting

    8. Verify the OS was updated with the verify command aV!, followed by the aD0! command to read the results. 8.4 Troubleshooting Symptom: On a CRBasic data logger, data values report NAN, or on a non-Campbell Scientific data logger, data values do not change when new measurement commands are issued. Wintersense SDI-12...
  • Page 31 Solution: 1. Verify the Wintersense SDI-12 is wired correctly. See Table 7-1 (p. 8). NOTE: Connect the power wire to the data logger 12V terminal and not the SW12 terminal. 2. Verify the power to the Wintersense SDI-12 is in the appropriate range (6 to 18 VDC). 3.
  • Page 32 Symptom: Inaccurate temperature or relative humidity is reported. Solution: 1. Clean the sensor tip with distilled water or replace it. 2. Check that the sensor is not installed too close to a radio transmitter or cell phone. NOTE: All factory repairs and recalibrations require a returned material authorization (RMA) and completion of the “Statement of Product Cleanliness and Decontamination”...

  • Page 33: Appendix A. Importing Short Cut Code Into Crbasic Editor

    Appendix A. Importing Short Cut code into CRBasic Editor Short Cut creates a .DEF file that contains wiring information and a program file that can be imported into CRBasic Editor. By default, these files reside in the C:\campbellsci\SCWin folder. Import Short Cut program file and wiring information into CRBasic Editor: 1.

  • Page 34: Appendix B. Sdi-12 Sensor Support

    SDI-12, Serial Data Interface at 1200 baud, is a protocol developed to simplify sensor and data logger compatibility. Only three wires are necessary — serial data, ground, and 12 V. With unique addresses, multiple SDI-12 sensors can connect to a single SDI-12 terminal on a Campbell Scientific data logger.

  • Page 35: Acknowledge Active Command (A!)

    Table B-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! Start Measurement aMC! atttn <CR><LF>...

  • Page 36: Start Verification Command (Av!)

    SDI-12 version number (indicates compatibility) cccccccc 8-character vendor identification mmmmmm 6 characters specifying the sensor model 3 characters specifying the sensor version (operating system) Up to 13 optional characters used for a serial number or other specific xxx…xx sensor information that is not relevant for operation of the data logger Terminates the response <CR><LF>...

  • Page 37: Start Measurement Commands (Am!)

    B.1.6 Start measurement commands (aM!) A measurement is initiated with the M! command. The response to each command has the form atttn<CR><LF>, where a = sensor address ttt = time, in seconds, until measurement data is available. When the data is ready, the sensor notifies the data logger, and the data logger begins issuing D commands.
  • Page 38 nn = the number of values to be returned when one or more subsequent D commands are issued. See the following example. A data logger has three sensors wired into terminal C1. The sensors are addresses X, Y, and Z. The data logger will issue the following commands and receive the following responses: Table B-3: Example aC! sequence The data logger makes a request to sensor X to start...

  • Page 39: Start Measurement Commands With Cyclic Redundancy Check (Amc! And Acc!)

    Table B-3: Example aC! sequence Ten seconds later, after a total of 40 seconds have passed, the data logger starts the process of YD0! collecting data from sensor Y by issuing the first D command. The sensor immediately responds with the sensor Y+1+2+3+4+5+6<CR><LF>...

  • Page 40: Continuous Measurement Command (Ar0

    characters of data in response to a D command that follows an M! or MC! command. A sensor may return up to 75 characters of data in response to a D command that follows a C! or CC! command. Data values are separated by plus or minus signs. Command: aD0! (aD1! …...

  • Page 41: 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 42 4. Select the correct Communication Port and click Connect. 5. Click the Terminal tab. 6. Select All Caps Mode. 7. Press Enter until the data logger responds with the data logger (CR1000X>) prompt. 8. Type SDI12 and press Enter. 9. At the Select SDI12 Port prompt, type the number corresponding to the control port where the sensor is connected and press Enter.

  • Page 43: References

    response Entering SDI12 Terminal indicates that the sensor is ready to accept SDI-12 commands. 10. To query the sensor for its current SDI-12 address, type ?! and press Enter. The sensor responds with its SDI-12 address. If no characters are typed within 60 seconds, the mode is exited.
  • Page 44 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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