INSTRUCTION MANUAL Model 109 Temperature Probe Revision: 9/14 C o p y r i g h t © 1 9 8 3 - 2 0 1 4 C a m p b e l l S c i e n t i f i c , I n c .
Limited Warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI, but that are resold by CSI, 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.
Precautions DANGER — MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON OR AROUND TRIPODS, TOWERS, AND ANY ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC. FAILURE TO PROPERLY AND COMPLETELY ASSEMBLE, INSTALL, OPERATE, USE, AND MAINTAIN TRIPODS, TOWERS, AND ATTACHMENTS, AND FAILURE TO HEED WARNINGS, INCREASES THE RISK OF DEATH, ACCIDENT, SERIOUS INJURY, PROPERTY DAMAGE, AND PRODUCT FAILURE.
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 .................................................................... 1 5. Overview ...........
Table of Contents Figures 6-1. 6-2. 7-1. 7-2. 8-1. Worst case probe and measurement errors .......................................... 5 Steinhart-Hart linearization error ........................................................ 6 109 and 41303-5A Radiation Shield on a Tripod Mast ....................... 8 109 and 41303-5A Radiation Shield on a CM200 Series Crossarm.... 9 109 Thermistor Probe Schematic ...................................................... 10 7-1. C-1.
Model 109 Temperature Probe 1. Introduction The 109 Temperature Probe uses a thermistor to measure temperature in air, soil, and water. It is compatible with all CRBasic dataloggers except the CR9000(X). See Section 6, Specifications, for a list of compatible CRBasic dataloggers. For Edlog datalogger support, check the availability of an older manual at www.campbellsci.com/old-manuals, or contact a Campbell Scientific application engineer for assistance. 2. 3. 4.
Model 109 Temperature Probe 2 2. The Short Cut installation should place an icon on the desktop of your computer. To open Short Cut, click on this icon. 3. When Short Cut opens, select New Program. 4. Select Datalogger Model and Scan Interval (default of 5 or 10 seconds is OK for most applications). Click Next.
Model 109 Temperature Probe 5. Under the Available Sensors and Devices list, select the Sensors folder, then select the Temperature sub-folder. Select 109 Temperature Probe. Click to move the selection to the Selected device window. Data defaults to degree Celsius. This can be changed by clicking the Deg C box and selecting Deg F, for degrees Fahrenheit, or K, for Kelvin. 6.
Model 109 Temperature Probe 5. 7. Select any other sensors you have, and then finish the remaining Short Cut steps to complete the program. The remaining steps are outlined in Short Cut Help, which is accessed by clicking on Help | Contents | Programming Steps. 8. If LoggerNet, PC400, RTDAQ, or PC200W is running on your PC, and the PC to datalogger connection is active, you can click Finish in Short Cut and you will be prompted to send the program just created to the datalogger. 9.
Model 109 Temperature Probe Steinhart-Hart Linearization Error: ≤ 0.03 °C (–50 to 70 °C) Probe Weight and Dimensions Weight with 10 ft cable: Length: Diameter: 136 g (5 oz) 10.4 cm (4.1 in) 0.762 cm (0.3 in) See FIGURE 6-1, Worst-case probe and measurement errors, and FIGURE 6-2, Steinhart-Hart linearization error. Overall probe accuracy is a combination of thermistor interchangeability, bridge-resistor accuracy, and error of the Steinhart-Hart equation.
Model 109 Temperature Probe Steinhart-Hart Linearization Error 0.03 0.025 Error °C 0.02 0.015 0.01 0.005 0 -50 -40 -30 -20 -10 -0.005 0 10 20 30 40 50 60 70 Temperature °C FIGURE 6-2. Steinhart-Hart linearization error 7. Installation If you are programming your datalogger with Short Cut, skip Section 7.1, Wiring to Datalogger, and Section 7.2, Datalogger Programming. Short Cut does this work for you. See Section 4, Quickstart, for a Short Cut tutorial. 7.
Model 109 Temperature Probe 7.2 Datalogger Programming Short Cut is the best source for up-to-date datalogger programming code. Programming code is needed when: • • Creating a program for a new datalogger installation Adding sensors to an existing datalogger program If your data acquisition requirements are simple, you can probably create and maintain a datalogger program exclusively with Short Cut.
Model 109 Temperature Probe 7.3 Air Temperature Installation For air temperature measurements, locate probes over an open level area at least 9 m (EPA) in diameter. The surface should be covered by short grass or the natural earth surface where grass does not grow. Probes should be located at a distance of at least four times the height of any nearby obstruction, and at least 30 m (EPA) from large paved areas. Sensors should be protected from thermal radiation, and adequately ventilated.
Model 109 Temperature Probe Tripod Mast or Tower Leg 41303-5A 109 CM200 Series Crossarm FIGURE 7-2. 109 and 41303-5A Radiation Shield on a CM200 Series Crossarm The 109 is held in the 41303-5A radiation shield by a mounting clamp at the bottom (FIGURE 7-2). Loosen the mounting clamp screws, and insert the probe through the clamp. Tighten the screws to secure the sensor and route the sensor cable to the instrument enclosure. Secure the cable to the tripod or tower using cable ties. 7.
Model 109 Temperature Probe 8. Operation 8.1 Sensor Schematic FIGURE 8-1. 109 Thermistor Probe Schematic 8.2 Measurement and Output Linearization CRBasic instruction Therm109() measures the 109 probe thermistor and automatically converts the result to temperature. With reference to the previous FIGURE 8-1, 109 thermistor probe schematic, a precise excitation voltage is applied at the Vx line and the voltage drop across the 24.9 kΩ resistor is measured at the Vs line.
Model 109 Temperature Probe 8.3 Electrically Noisy Environments EMF noise emanating from the ac mains power grid can be a significant source of measurement error. 60 Hz noise is common in the United States. 50 Hz noise is common in Europe and other regions. Depending on the datalogger model, this noise can usually be filtered out. The following code snips filter 60 Hz noise by placing the _60Hz argument in the Integ/Fnotch parameter (in bold type).
Model 109 Temperature Probe Symptom: Incorrect temperature is reported. Verify the Mult and Offset arguments in Therm109() are correct for the desired units (Section 7.2, Datalogger Programming). Check the cable for signs of damage and possible moisture intrusion. Symptom: Unstable temperature is reported. Probably a result of electromagnetic interference. Try using the _50Hz or _60Hz Integ or Fnotch options, and/or increasing the settling time as described in Section 8.
Appendix A. Importing Short Cut Code Into CRBasic Editor This tutorial shows: • • How to import a Short Cut program into a program editor for additional refinement How to import a wiring diagram from Short Cut into the comments of a custom program Short Cut creates the following files, which can be imported into CRBasic Editor. Assuming defaults were used when Short Cut was installed, these files reside in the C:\campbellsci\SCWin folder: • • • • • • • .DEF (wiring and memory usage information) .
Appendix A.
Appendix B. Example Programs The following example can be used directly with CR200(X) series dataloggers. 'Program measures one 109 temperature probe once a second and 'stores the average temperature every 60 minutes.
Appendix B. Example Programs BeginProg Scan(1,Sec,1,0) 'Measure the temperature Therm109(T109_C,1,1,Vx1,0,_60Hz,1.0,0.0) 'Call Data Table CallTable(Table1) NextScan EndProg The following example can be used directly with CR6 series dataloggers. 'Program measures one 109 temperature probe once a second and 'stores the average temperature every 60 minutes.
Appendix C. Thermistor Resistance and Temperature TABLE C-1.
Appendix C.
Appendix C. Thermistor Resistance and Temperature 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 1Data from Measurement Specialties™ 2487 2399 2315 2234 2157 2082 2011 1942 1876 1813 1752 1693 1637 1582 1530 1480 60.00 61.00 62.00 63.01 64.00 65.00 66.00 67.00 68.00 68.99 69.99 71.00 71.99 73.01 74.00 75.
Appendix C.
Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Centro Caribe S.A. (CSCC) 300 N Cementerio, Edificio Breller Santo Domingo, Heredia 40305 COSTA RICA www.campbellsci.cc • info@campbellsci.cc Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Ltd.
