Related Manuals for Campbell LI200R
Summary of Contents for Campbell LI200R
- Page 1 LI200R Pyranometer Revision: 4/18 C o p y r i g h t © 1 9 9 4 - 2 0 1 8 C a m p b e l l S c i e n t i f i c ,...
- 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.
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Page 7: Table Of Contents
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. Precautions ..............1 3. Initial Inspection ............1 Ships With .................... - Page 8 Multipliers Required for Average Flux and Total Flux Density for SI and English Units ..............11 8-1. Replacement Parts ................13 B-1. Wiring for Example Programs............B-1 CRBasic Examples B-1. CR1000X Program for Measuring the LI200R ....... B-1 B-2. CR6 Program for Measuring the LI200R ........B-2...
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Page 9: Introduction
Care should be taken when opening the shipping package to not damage or • cut the cable jacket. If damage to the cable is suspected, contact Campbell Scientific. Although the LI200R is rugged, it should be handled as a precision •... -
Page 10: Ships With
LI200R Pyranometer Ships With (1) Calibration Sheet • The LI200R is also shipped with a red cap on it. Ensure that this red cap is removed after installing the sensor. Save the cap for shipping or storing the sensor. NOTE The calibration sheet shipped with each sensor includes a serial number and calibration constant. - Page 11 LI200R Pyranometer Repeat step three for other sensors you want to measure. In Output Setup, type the scan rate, a meaningful table name, and the Data Output Storage Interval. Select measurement and its associated output options.
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Page 12: Overview
The LI200R is calibrated against an Eppley Precision Spectral Pyranometer to accurately measure sun plus sky radiation. Do not use the LI200R under vegetation or artificial lights because it is calibrated for the daylight spectrum (400 to 1100 nm). FIGURE shows the pyranometer spectral response. -
Page 13: Specifications
LI200R Pyranometer The –L portion of the model number indicates that the LI200R has a user- specified cable length. Its cables can terminate in: Pigtails that connect directly to a Campbell Scientific datalogger • (cable termination option –PT). • Connector that attaches to a CWS900-series interface (cable termination option –CWS). -
Page 14: Installation
(p. 2) Siting Mount the LI200R so that no shadows or reflections are cast on it by the tripod/tower or other sensors. Mount the sensor with the cable pointing towards the nearest magnetic pole. For example, in the Northern Hemisphere, point the cable toward the North Pole. -
Page 15: Mounting Procedure
LI200R Pyranometer 7.2.2 Mounting Procedure CAUTION Avoid mounting the CM225 directly to a vertical pipe. Instead, mount the CM225 to a crossarm. This avoids reflections from the vertical pipe onto the sensor. Mount the crossarm to the tripod or the tower if using a CM225. - Page 16 LI200R Pyranometer Place the LI200R in the center of the LI2003S base/leveling fixture. Secure the LI200R to the LI2003S by tightening the small Phillips screws. Bubble Level Leveling Holes for Screws Mounting Screws LI2003S Base LI200R Small Phillips Screws Loosely mount the LI2003S and LI200R on the CM225 or 015ARM. Do not fully tighten the three mounting screws.
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Page 17: Wiring
Remove the red cap after installing the sensor. Save this cap for shipping or storing the sensor. Wiring A schematic diagram of the LI200R is shown in FIGURE 7-1. FIGURE 7-1. LI200R schematic Connections to Campbell Scientific dataloggers are given in TABLE 7-1. -
Page 18: Programming
Programming basics and programming examples for Edlog dataloggers are provided at www.campbellsci.com/old-manuals. The LI200R output is measured by the datalogger by using the VoltDiff() CRBasic instruction. CRBasic is included in PC400 and LoggerNet datalogger support software. The VoltDiff() instruction has the following structure:... -
Page 19: Input Range
LI200R Pyranometer 7.4.1 Input Range The following is an example of how to determine the optimum input range for a given sensor calibration and maximum expected irradiance. This is an example only. Your values will be different. This example uses the calibration provided by LI-COR ®... -
Page 20: Troubleshooting, Maintenance, And Calibration
Calibration Recalibrate the LI200R every two years. The LI200R can be separated into two parts. The sensor head containing the photodiode disconnects from the base and cabling. Calibration values follow... -
Page 21: Taking The Sensor Apart
When it’s problematic to send in the sensor and the cable, you can send only the sensor head for recalibration. A new calibrated LI200R head can be used with the base or a protective cover put over it. Never leave the base part of the sensor exposed to the environment while the sensor head is being calibrated. -
Page 22: Remove The Sensor
LI200R Pyranometer 8.3.2 Remove the Sensor Remove the sensor from the LI2003S leveling fixture. Remove the three small Phillips screws from the underside of the sensor. Don’t lose them. Gently pull the sensor apart. Notice the two wires coming up from the base into a small printed circuit board. -
Page 23: Acknowledgements
Remember to update the datalogger program with the new sensor head calibration value. Pack the head for shipment and send it to Campbell Scientific. Refer to the Assistance page at the beginning of this document for the required procedure for sending equipment to Campbell Scientific. -
Page 25: 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 27 Appendix B. Example Programs The following programs measure the LI200R every second, and converts the mV output to Wm –2 and MJ m –2 . The scan interval is entered as a constant at the beginning of the program. This way the user changes the constant when they want to change their scan rate and it ripples through the program.
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Page 28: Example Programs
SlrW=SlrW*140.1149 'Call Data Tables and Store Data CallTable Hourly CallTable Daily NextScan EndProg CRBasic Example B-2. CR6 Program for Measuring the LI200R 'CR6 Series 'Declare Constants 't=scan rate in seconds Constant t = 1 'Declare Variables and Units Public BattV... - Page 29 Scan(t,Sec,1,0) 'Default Datalogger Battery Voltage measurement 'BattV' Battery(BattV) 'Default Wiring Panel Temperature measurement 'PTemp_C' PanelTemp(PTemp_C,60) 'LI200R Pyranometer measurements 'SlrMJ' and 'SlrW' 'Measurement returns SlrW in millivolts. VoltDiff(SlrW,1,mV200,U1,True,0,60,1,0) 'Set negative value to zero. If SlrW<0 Then SlrW=0 'Convert millivolts to Megajoules/m² by using equation from TABLE 7-2.
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