Campbell 109 Product Manual
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Campbell 109 Product Manual

Temperature probe
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Revision: 05/2021
Copyright © 1983 – 2021
Campbell Scientific, Inc.

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Summary of Contents for Campbell 109

  • Page 1 Revision: 05/2021 Copyright © 1983 – 2021 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 Wiring to data logger 7.2 Data logger programming 7.2.1 Therm109() instruction 7.3 Air temperature installation 7.4 Water temperature installation 7.5 Soil temperature installation 8.

  • Page 3: Introduction

    1. Introduction The 109 Temperature Probe uses a thermistor to measure temperature in air, soil, and water. It easily interfaces with most Campbell Scientific data loggers and can be used in a variety of applications. For Edlog data logger support, check the availability of an older manual at www.campbellsci.com/old-manuals...
  • Page 4  1. Open Short Cut and click Create New Program.  2. Double-click the data logger model.  3. In the Available Sensors and Devices box, type 109 or find the 109 in the Sensors > Temperature folder. Double-click the 109 Temperature Probe. Data defaults to degree Celsius.
  • Page 5  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 being measured. Click Next.  6. In Output Setup, type the scan rate, Data Output Storage Intervals, and meaningful table names. 109 Temperature Probe     3...

  • Page 6: Overview

    5. Overview The 109 is a rugged probe that accurately measures air, soil, or water temperature in a variety of applications. The sensor consists of a thermistor encapsulated in an epoxy-filled aluminum housing. This design allows the probe to be buried or submerged in water to 15 m (50 ft) or 21 psi.

  • Page 7: Specifications

    Interchangeability is the principle component error. If needed, an estimate of the interchangeability error for 0 to 50 °C, that can be used as the Offset parameter of the Therm109() instruction, can be determined with a 1-point or 2-point calibration. 109 Temperature Probe     5...

  • Page 8: Installation

    CRBasic Editor to create or add to a customized program, follow the procedure in Importing Short Cut code into CRBasic Editor (p. 14). Programming basics are provided in the following section. A complete program example can be found in Example program (p. 15). 109 Temperature Probe     6...

  • Page 9: Therm109() Instruction

    If the 109 probe is to be used with long cable lengths or in electrically noisy environments, consider employing the measurement programming techniques outlined in Electrically noisy environments (p. 11) and Long cable lengths (p. 11). Details of 109 probe measurement and linearization of the thermistor output are provided in Measurement and output linearization (p.
  • Page 10 When exposed to sunlight, the 109 should be housed in a six-plate solar radiation shield. Six- plate shields offered by Campbell Scientific are models 41303-5A, 41303-5B, or RAD06. The white color of these shields reflects solar radiation, and the louvered construction allows air to pass freely through, thereby keeping the probe at or near ambient temperature.

  • Page 11: Water Temperature Installation

    Tighten the screws to secure the sensor, and route the sensor cable to the instrument enclosure. The 109 is held in the RAD06 radiation shield by inserting the sensor through the sensor gland at the bottom of the shield (FIGURE 7-2 (p.

  • Page 12: Operation

    8.1 Sensor schematic FIGURE 8-1. 109 thermistor probe schematic 8.2 Measurement and output linearization Therm109() CRBasic instruction measures the 109 probe thermistor and automatically converts Therm109() the result to temperature. With reference to the previous FIGURE 8-1 (p. 10), applies 2500 mV excitation at the Vx line and measures the voltage drop across the 24.9 kΩ...

  • Page 13: Electrically Noisy Environments

    Enter a longer settling time in the SettlingTime parameter of the Therm109() instruction. Campbell Scientific suggests doubling the settling time every 50 ft. The following code snip examples increase settling time by 20000 µs by placing 20000 as the argument in the SettlingTime parameter: CR6-series data logger example: Therm109(T109_C,1,U1,U10,20000,60,1.0,0.0)

  • Page 14: Troubleshooting And Maintenance

    9.2 Maintenance The 109 probe requires minimal maintenance. For air temperature measurements, check the radiation shield monthly to make sure it is free from dust and debris. To clean the shield, first remove the sensor.

  • Page 15: Calibration

    Offset parameter of the Therm109() instruction, can be determined with a 1-point or 2-point calibration. Calibration of the 109 probe is not necessary unless the accuracy needed in the sensor data requires correction of the thermistor interchangeability offset described in Specifications (p.

  • Page 16: 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 109 Temperature Probe     14...

  • Page 17: Appendix B. Example Program

    Appendix B. Example program This following example measures one 109 temperature probe once a second and stores the average temperature every 60 minutes. CRBasic Example 1: CR1000X program that measures the 109 'Program measures one 109 temperature probe once a second and 'stores the average temperature every 60 minutes.

  • Page 18: Appendix C. Thermistor Resistance And Temperature

    Appendix C. Thermistor resistance and temperature   Table C-1: 109 thermistor resistance and temperature Actual temperature (°C) 10K3A1iA thermistor resistance (Ω) CRBasic Therm109() output (°C) 336098 -40.00 314553 -39.00 294524 -38.00 275897 -37.00 258563 -36.00 242427 -35.00 227398 -34.00 213394 -33.00...
  • Page 19 Table C-1: 109 thermistor resistance and temperature Actual temperature (°C) 10K3A1iA thermistor resistance (Ω) CRBasic Therm109() output (°C) 97006 -20.00 91553 -19.00 86439 -18.00 81641 -17.00 77138 -16.00 72911 -15.00 68940 -14.00 65209 -13.00 61703 -12.00 58405 -11.00 55304 -10.00 52385 -9.00...
  • Page 20 Table C-1: 109 thermistor resistance and temperature Actual temperature (°C) 10K3A1iA thermistor resistance (Ω) CRBasic Therm109() output (°C) 24172 6.00 23016 7.00 21921 8.00 20885 9.00 19903 10.00 18973 11.00 18092 12.00 17257 13.00 16465 14.00 15714 15.00 15001 16.00 14324 17.00...
  • Page 21 Table C-1: 109 thermistor resistance and temperature Actual temperature (°C) 10K3A1iA thermistor resistance (Ω) CRBasic Therm109() output (°C) 7402 32.00 7097 33.00 6807 34.00 6530 35.00 6266 36.00 6014 37.00 5774 38.00 5544 39.00 5325 40.00 5116 41.00 4916 42.00 4724 43.00...
  • Page 22 Table C-1: 109 thermistor resistance and temperature Actual temperature (°C) 10K3A1iA thermistor resistance (Ω) CRBasic Therm109() output (°C) 2674 58.00 2579 59.00 2487 60.00 2399 61.00 2315 62.00 2234 63.01 2157 64.00 2082 65.00 2011 66.00 1942 67.00 1876 68.00 1813 68.99...
  • Page 23 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. Refer to www.campbellsci.com/terms#warranty for more information.
  • Page 24 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. For all returns, the customer must provide a “Statement of Product Cleanliness and Decontamination”...
  • Page 25 Do not recharge, disassemble, heat above 100 °C (212 °F), solder directly to the cell, incinerate, or expose contents to water. Dispose of spent batteries properly. 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 26 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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