Campbell SI-111 Product Manual
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Campbell SI-111 Product Manual

Precision infrared radiometers
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SI-111 and
SI-111SS
Precision Infrared
Radiometers
Revision: 9/18
Copyright © 2002 – 2018
Campbell Scientific, Inc.

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Summary of Contents for Campbell SI-111

  • Page 1 SI-111 and SI-111SS Precision Infrared Radiometers Revision: 9/18 Copyright © 2002 – 2018 Campbell Scientific, Inc.
  • Page 3 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.
  • Page 4 Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA) number, contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000. Please write the issued RMA number clearly on the outside of the shipping container. Campbell Scientific’s shipping address is: CAMPBELL SCIENTIFIC, INC.
  • Page 5 • 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 SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC.

  • Page 7: Table Of Contents

    B. Example Program ........... B-1 Figure 7-1. Protective cap on sensor head .............. 6 Tables 7-1. Wire Color, Function, and Datalogger Connections ......7 B-1. Wiring for Example Program ............B-1 CRBasic Example CR1000X Datalogger Program for Measuring SI-111 or SI-111SS B-2...

  • Page 9: Introduction

    A Campbell Scientific datalogger uses these measurements to calculate the correct temperature of the subject. The SI-111SS replaced the SI-111 in August 2018. The SI-111SS has a stainless steel connector, a removable cable, different wiring, and a serial number of 7283 or above. Both sensors are manufactured by Apogee Instruments.

  • Page 10: Quickstart

    SI-111 and SI-111SS Precision Infrared Radiometers QuickStart A video that describes datalogger programming using Short Cut is available at: www.campbellsci.com/videos/cr1000x-datalogger-getting-started-program- part-3. Short Cut is an easy way to program your datalogger to measure the sensor and assign datalogger wiring terminals. Short Cut is available as a download on www.campbellsci.com.
  • Page 11 SI-111 and SI-111SS Precision Infrared Radiometers Click on the Wiring tab to see how the sensor is to be wired to the datalogger. Click OK after wiring the sensor. Repeat steps three and four for other sensors. Click Next. In Output Setup, type the scan rate, meaningful table names, and the...

  • Page 12: Overview

    The field-of-view for infrared sensors is calculated based on the geometry of the sensor and lens. The SI-111 and SI-111SS have a 22-degree half angle field of view (FOV). The FOV is reported as the half-angle of the apex of the cone formed by the target (cone base) and the detector (cone apex).

  • Page 13: Specifications

    SI-111 and SI-111SS Precision Infrared Radiometers Specifications Features: • Measures surface temperature continuously in the field • Provides road surface, plant canopy, soil surface, snow surface, and water surface temperature measurements • Avoids influencing the temperature providing more accurate measurements •...

  • Page 14: Installation

    CM200-series crossarm, tripod or tower mast, or a 0.75 inch-to-1-inch IPS pole. The CM230 and CM230XL are adjustable mounts that allow the sensor to be pointed at the target. The SI-111 and SI-111SS also include a hole threaded for a standard tripod camera mount screw (1/4-inch diameter; 20 threads per inch) for mounting them to a user-supplied support.

  • Page 15: Wiring To The Datalogger

    SI-111 and SI-111SS Precision Infrared Radiometers Wiring to the Datalogger TABLE 7-1. Wire Color, Function, and Datalogger Connections SI-111 SI-111SS Wire Wire Wire Datalogger Connection Color Color Function Terminal U configured for differential high Thermopile White input , DIFF H (differential...

  • Page 16: Sensor Body Temperature Measurements

    SI-111 and SI-111SS Precision Infrared Radiometers 7.4.1 Sensor Body Temperature Measurements 7.4.1.1 Therm109() Instruction CRBasic dataloggers measure the sensor body temperature (°C) using the Therm109() instruction: Therm109(Dest, Reps, SEChan, Mult, Offset) Use the default values for Mult and Offset, which output the temperature in °C.

  • Page 17: Maintenance

    SI-111 and SI-111SS Precision Infrared Radiometers Where, b=intercept SBTempC = sensor body temperature in °C bC2 = intercept polynomial coefficient (C2) from the calibration sheet bC1 = intercept polynomial coefficient (C1) from the calibration sheet bC0 = intercept polynomial coefficient (C0) from the calibration sheet Equation 3 converts the sensor body temperature from degrees Celsius to Kelvin.
  • Page 18 SI-111 and SI-111SS Precision Infrared Radiometers scratching the thin optical coating on the window. Let the solvent do the cleaning, not mechanical force. Repeat the cleaning with a new cotton swab to ensure a completely clean window. In some environments, sensors can stay clean for many months, while in other environments, the sensor needs frequent cleaning.

  • Page 19: Importing Short Cut Code Into Crbasic Editor

    Appendix A. Importing Short Cut Code Into CRBasic Editor This tutorial shows: • Importing a Short Cut program into a program editor for additional refinement • Importing a wiring diagram from Short Cut into the comments of a custom program Short Cut creates files, which can be imported into CRBasic Editor.

  • Page 21: Example Program

    Coefficients used to calculate the slope (m) and intercept (b) are NOTE specific to individual sensors. The unique coefficients for each individual sensor are provided on the calibration sheet shipped with the sensor. TABLE B-1. Wiring for Example Program SI-111 SI-111SS Wire Color Wire Color Description CR1000X White Diff.
  • Page 22 Appendix B. Example Program CRBasic Example B-1. CR1000X Datalogger Program for Measuring SI-111 or SI-111SS 'CR1000X Series Datalogger Program 'Declare public variables Public PanelT, BattV, SBTempC, SBTempK, TargmV, m, b, TargTempK, TargTempC 'Declare constants (replace the listed values with coefficients received with sensor)

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