INSTRUCTION MANUAL Model 109SS Temperature Probe Revision: 3/14 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 .
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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 B. Example Programs.................................................. B-1 B.1 Example CRBasic Programs ........................................................... B-1 B.1.1 Example 1 — Sample program for CR200(X) series dataloggers ............................................................................ B-1 B.1.2. Example 2 — Sample program for CR800 series, CR1000, CR3000, and CR5000 dataloggers........................................ B-1 B.1.
Model 109SS Temperature Probe 1. Introduction The 109SS Temperature Probe uses a thermistor to measure temperature in soil and water. It is compatible with all CRBasic and Edlog dataloggers except the CR9000(X). See Section 6, Specifications, for a complete list of compatible dataloggers. 2. Cautionary Statements Santoprene® rubber, which composes the black outer jacket of the 109SS cable, will support combustion in air.
Model 109SS Temperature Probe 2 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 109SS Temperature Probe 5. Under the Available Sensors and Devices list, select the Sensors | Temperature 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. After selecting the sensor, click at the left of the screen on Wiring Diagram to see how the sensor is to be wired to the datalogger.
Model 109SS Temperature Probe 5. 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. If the sensor is connected to the datalogger, as shown in the wiring diagram in step 6, check the output of the sensor in the datalogger support software data display to make sure it is making reasonable measurements.
Model 109SS Temperature Probe Maximum Steinhart-Hart Linearization Error: 0.02 °C at –40 °C FIGURE 6-1. Worst-case probe and measurement errors Steinhart & Hart - Tabulated values 0.03 0.025 Error Degrees C 0.02 0.015 0.01 0.005 0 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 -0.005 Temperature Degrees C FIGURE 6-2. Steinhart-Hart linearization error 1 The overall probe accuracy is a combination of the thermistor interchangeability specification and the accuracy of the bridge resistor.
Model 109SS Temperature Probe Stainless-Steel Sheath Diameter: 0.16 cm (0.063 in) Length: 5.84 cm (2.3 in) Overmolded Joint Diameter: 1.02 cm (0.40 in) Length: 4.24 cm (1.67 in) 7. Cable: Santoprene®, 0.220 in diameter Cable/Probe Connection: ATUMTM heat shrink Macromelt® overmolded joint Weight: 0.2 lb per 10.5 ft cable Installation If you are programming your datalogger with Short Cut, skip Section 7.1, Wiring to Datalogger, and Section 7.2, Datalogger Programming.
Model 109SS Temperature Probe NOTE Short Cut cannot edit programs after they are imported and edited in CRBasic Editor. A Short Cut tutorial is available in Section 4, Quickstart. If you wish to import Short Cut code into either Edlog or CRBasic Editor to create or add to a customized program, follow the procedure in Appendix A.1, Importing Short Cut Code into a Program Editor. Programming basics for CRBasic and Edlog dataloggers are provided in the following sections.
Model 109SS Temperature Probe 1: 1: 2: 3: 4: 5: 6: 7: 8: AC Half Bridge (P5) 1 Reps 25 2500 mV 60 Hz Rejection Range 1 SE Channel 1 Excite all reps w/Exchan 1 2500 mV Excitation 1 Loc [ V_Vx ] 1 Multiplier 0 Offset 2: Z=1/X (P42) 1: 1 X Loc [ V_Vx 2: 2 Z Loc [ Vx_V 3: 1: 2: 3: Z=X+F (P34) 2 X Loc [ Vx_V -1 F 3 Z Loc [ Vx_V_1 4: 1: 2: 3: Z=X*F (P37) 3 X Loc [ Vx_V_1 24900 F 4 Z Loc [ Rs 5: Z=LN(X) (P40) 1: 4 X Loc [ Rs 2: 5 Z Loc [ lnRs ] ] ] ] ] ] ] ] 6: 1: 2: 3: Z=X*F (P37) 5 X Loc [ lnRs ] 0.
Model 109SS Temperature Probe 7.3 Water Temperature Installation 109SS probes can be submerged to 45 m (150 ft) or 63 psi. The 109SS is not weighted, so a weighting system should be added, or the probe secured to a fixed submerged object such as a piling. 7.4 Soil Temperature Installation The 109SS tends to measure the average temperature over its length, so it should generally be buried such that the measurement tip is horizontal to the soil surface at the desired depth.
Model 109SS Temperature Probe The ratio of measured voltage (Vs) to excitation voltage (Vx) is related to thermistor resistance (Rs) and the 24.9 kΩ fixed resistor as described in the following equation: Vs/Vx = 24900 / (Rs + 24900) Solving for Rs: Rs + 24900 = 24900 • (Vx/Vs) Rs = 24900 • ((Vx/Vs) - 1) TABLE 8-1, 109SS Measurement Details, and TABLE 8-2, 109SS Temperature Calculation, describe how measurement results Vs/Vx and Rs are converted to temperature by Campbell Scientific dataloggers. TABLE 8-1.
Model 109SS Temperature Probe where: Tk = temperature in Kelvin X = 0.001 • ln(Rs) C0 = A = 0.001129 C1 = B • 1E3 = 0.234108 C2 = 0 C3 = C • 1E9 = 87.7547 C4 = 0 C5 = 0 See Appendix C, Thermistor Resistance Table. 1CRBasic dataloggers are CR800, CR1000, CR3000, and CR5000. 2Coefficients provided by the thermistor manufacturer. 3Edlog dataloggers are CR10(X), CR510, CR500, CR23X, 21X, and CR7. 8.
Model 109SS Temperature Probe Therm109(T109_C,1,1,1,20000,_60Hz,1.0,0.0) NOTE Integration options and the settling time parameter are not available for CR200(X) series dataloggers. Edlog In place of the AC Half Bridge (P5), use the Excite-Delay (SE) (P4) instruction with a 20 ms delay to measure the probe, as shown in the following example: 1: Excite-Delay 1: 1 2: 5 3: 1 4: 1 5: 2 6: 2500 7: 3 8: .0004 9: 0.0 9.
Model 109SS Temperature Probe 9.2 Maintenance The 109SS probe requires minimal maintenance. Periodically check cabling for signs of damage and possible moisture intrusion. 9.3 Calibration Calibration of the 109SS probe is not necessary unless the application requires removal of the thermistor interchangeability offset described in Section 6, Specifications.
Model 109SS Temperature Probe 14
Appendix A. Importing Short Cut Code 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. A.1 Importing Short Cut Code into a Program Editor Short Cut creates files that can be imported into either CRBasic Editor or Edlog program editor. These files normally reside in the C:\campbellsci\SCWin folder and have the following extensions: • • • • • • .
Appendix A. Importing Short Cut Code 6. Import wiring information to the program by opening the associated .DEF file. Copy and paste the section beginning with heading “-Wiring for CRXXX–” into the CRBasic program, usually at the head of the file. After pasting, edit the information such that a ' character (single quotation mark) begins each line. This character instructs the datalogger compiler to ignore the line when compiling the datalogger code. A.1.
Appendix B. Example Programs B.1 Example CRBasic Programs B.1.1 Example 1 — Sample program for CR200(X) series dataloggers 'Program measures one 109SS temperature probe once a second and 'stores the average temperature every 60 minutes.
Appendix B. Example Programs '*AG = Analog Ground (represented by ground symbol on CR1000 wiring panel 'Declare the variables for the temperature measurement Public T109_C 'Define a data table for 60 minute averages DataTable(Table1,True,-1) DataInterval(0,10,Min,10) Average(1,T109_C,FP2,False) EndTable 'Main Program BeginProg Scan(1,Sec,1,0) 'Measure the temperature Therm109(T109_C,1,1,1,0,_60Hz,1.0,0) 'Call Data Table CallTable(Table1) NextScan EndProg B.1.
Appendix B. Example Programs 'Call the data table CallTable AvgTemp NextScan EndProg B.2 Example Edlog Program This example can be used directly with CR10X dataloggers. With minor adaptations, it can also be used with CR10, CR500, CR510, CR23X, and CR7X dataloggers. More adaptation will be needed with the 21X and CR7 dataloggers. Contact a Campbell Scientific application engineer for help with any datalogger program.
Appendix B. Example Programs 7: Polynomial (P55) 1: 1 Reps 2: 6 X Loc [ Scal_lnRt ] 3: 7 F(X) Loc [ 1_Tk 4: .001129 C0 5: .234108 C1 6: 0.0 C2 7: 87.7547 C3 8: 0.0 C4 9: 0.0 C5 8: Z=1/X (P42) 1: 7 2: 8 X Loc [ 1_Tk Z Loc [ Tk ] ] 9: Z=X+F (P34) 1: 8 2: -273.
Appendix C. Conversion of Thermistor Resistance or Voltage Ratio to Temperature TABLE C-1. Voltage Ratio, Resistance, and Temperature1 Actual Temperature (°C) -40 -39 -38 -37 -36 -35 -34 -33 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 10K3MCD1 Thermistor Resistance (Ω) 336103.2 314558 294529.1 275900.8 258567 242430.2 227400.9 213396.6 200341.4 188165.5 176804.8 166199.8 156296.1 147043.2 138394.7 130307.6 122742.3 115662.
Appendix C. Conversion of Thermistor Resistance or Voltage Ratio to Temperature 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 C-2 28054.4 26687.5 25395 24172.5 23015.9 21921.2 20884.7 19903.2 18973.3 18092.2 17256.9 16464.9 15713.7 15000.9 14324.5 13682.3 13072.6 12493.3 11943 11419.9 10922.7 10449.8 10000 9572 9164.7 8777 8407.7 8056.1 7721 7401.7 7097.3 6807.1 6530.3 6266.2 6014.3 5773.
Appendix C. Conversion of Thermistor Resistance or Voltage Ratio to Temperature 59 2578.6 60 2487.1 61 2399.4 62 2315.2 63 2234.4 64 2156.8 65 2082.3 66 2010.8 67 1942.1 68 1876 69 1812.6 70 1751.6 71 1693 72 1636.6 73 1582.4 74 1530.2 75 1480.1 1Data from Measurement SpecialtiesTM 59.03 60.03 61.03 62.03 63.03 64.03 65.03 66.03 67.03 68.03 69.03 70.03 71.03 72.03 73.03 74.03 75.03 59.00 60.00 61.00 62.00 63.00 64.00 65.00 66.00 67.00 68.00 69.00 70.00 71.00 72.00 73.00 74.00 75.
Appendix C.
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