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Summary of Contents for Campbell CMP3
- Page 1 CMP3 Pyranometer Revision: 02/2020 Copyright © 2006 – 2020 Campbell Scientific CSL I.D - 332...
- Page 3 Quotations for repairs can be given on request. It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment, in support of this policy a “Declaration of Hazardous Material and Decontamination”...
- Page 5 PLEASE READ FIRST About this manual Please note that this manual was originally produced by Campbell Scientific Inc. primarily for the North American market. Some spellings, weights and measures may reflect this origin. Some useful conversion factors: Area: 1 in...
- Page 7 • 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...
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Page 9: 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 ....................1 Calibration Certificate ................1 4. - Page 10 Table of Contents Figures 7-1. Pyranometer installation ...............6 7-2. CMP3 Schematic ................10 Tables 7-1. Wire Colour, Function, and Data Logger Connection......10 7-2. Multipliers Required for Flux Density and Total Fluxes ....12 CRBasic Example B-1. CR1000X Example Program ............B-1...
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Page 11: Introduction
The CMP3 is an ISO-second-class pyranometer that monitors solar radiation for the full solar spectrum range. It produces a millivolt signal that is measured directly by a Campbell Scientific data logger. The CMP3 can provide solar radiation measurements for a variety of meteorological applications. -
Page 12: Quickstart
Open Short Cut and click Create New Program. Double-click the data logger model. In the Available Sensors and Devices box, type CMP3 or find the sensor in the Sensors > Meteorological > Solar Radiation folder. Double-click CMP3/CMP6/CMP11 Pyranometer. Default units are kW/m... - Page 13 CMP3 Pyranometer Click on the Wiring tab to see how the sensor is to be wired to the data logger. 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 Data...
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Page 14: Overview
Two CMP3s can be used in combination to measure albedo. The CMP3 can also be used to measure most types of artificial light, such as Xenon lamps or Halogen lamps. -
Page 15: Specifications
Includes bubble level and levelling screws eliminating need for a separate levelling base, which simplifies installation Acceptable for providing the solar radiation data used in stability • estimations Compatible with Campbell Scientific CRBasic data loggers: CR6, • CR3000, CR1000X, CR800-series, CR300-series, CR1000 Specifications ISO classification:... -
Page 16: Installation
Site the CMP3 to allow easy access for maintenance while ideally avoiding any obstructions or reflections above the plane of the sensing element. It is important to mount the CMP3 such that a shadow or reflection will not be cast on it at any time (FIGURE 7-1). -
Page 17: Mounting To An Instrument Mount
Step ladder 7.2.2 Mounting Procedure The CMP3 is typically mounted to a tripod or tower using the CM225 solar sensor mounting stand. For information about mounting the CMP3 to another mounting stand, refer to the Solar Radiation Sensor Mounts manual. - Page 18 CM225 Stand CM200-Series Crossarm U-bolt Nuts Loosely mount the pyranometer on the mounting stand. Do not fully tighten the two mounting screws. CM225 mounting holes used for the CMP3 are indicated in orange. Mounting Screw Mounting Screw Levelling Screw Levelling Screw...
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Page 19: Wiring To The Data Logger
Route the sensor cable along the underside of the crossarm to the tripod/tower, and to the instrument enclosure. Secure the cable to the crossarm and mast using cable ties. Wiring to the Data Logger A schematic diagram of the CMP3 is shown in FIGURE 7-2. -
Page 20: Programming
Black Shield FIGURE 7-2. CMP3 Schematic NOTE A CMP3 purchased from Campbell Scientific has different wiring than a CMP3 purchased directly from Kipp & Zonen. TABLE shows connections to Campbell Scientific data loggers. Use either differential or single-ended analogue terminals to measure solar radiation. The differential measurement has better noise rejection and is therefore recommended. -
Page 21: Input Range
). The appropriate multipliers are listed in TABLE 7-2. The example reports both average and daily total solar radiation. The CMP3 outputs a low level voltage ranging from 0 to a maximum of up to 20 mV, in natural light, depending on the calibration factor and radiation level. -
Page 22: Multiplier
7.4.4 Output Format Considerations When using the Campbell Scientific floating point data format to store data, the largest number the data logger can store in final storage is 6999 in low resolution mode (FP2) and 99999 in high resolution mode (if available). If the measurement value is totalized, there is some danger of over-ranging the output limits. -
Page 23: Maintenance/Recalibrations
50% in the first hours after sunrise. The calibration of the CMP3 may drift with time and exposure to radiation. Campbell Scientific recommends recalibrating every two years. The sensor should be returned to Campbell Scientific, the manufacturer, or a calibration lab with facilities to calibrate radiation sensors. - Page 24 CMP3 Pyranometer Check for the presence of strong sources of electromagnetic radiation (radar, radio). Check the condition and the connection of the sensor shield wire. Check the condition of the sensor cable.
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Page 25: Importing Short Cut Code Into Crbasic Editor
Appendix A. Importing Short Cut Code Into CRBasic Editor Short Cut creates a .DEF file that contains wiring information and a program file that can be imported into the CRBasic Editor. By default, these files reside in the C:\campbellsci\SCWin folder. Import Short Cut program file and wiring information into CRBasic Editor: Create the Short Cut program. -
Page 27: Example Program
Appendix B. Example Program The following program measures the CMP3 every 10 s and converts the mV output to W/m and MJ/m . A sensor calibration of 15.02 µV per W/m is used for the example program. The program outputs an hourly average flux (W/m^2), and a daily total flux density (MJ/m Wiring for the example is given in TABLE B-1. - Page 28 Appendix B. Example Program Solar_Wm2<0 Then Solar_Wm2=0 'Calculate units in MJ, where MJ = m * t * 0.000001. m = Solar_Wm2 from above, and 't = 10 (scan interval) Solar_MJ=Solar_Wm2*0.00001 'Call Data Tables and Store Data CallTable(Hourly) CallTable(Daily) NextScan EndProg...
- Page 30 INFO Global Sales & Support Network A worldwide network to help meet your needs Australia France Thailand Garbutt, QLD Australia Vincennes, France Bangkok, Thailand Location: Location: Location: Phone: 61.7.4401.7700 Phone: 0033.0.1.56.45.15.20 Phone: 66.2.719.3399 info@campbellsci.com.au info@campbellsci.fr info@campbellsci.asia Email: Email: Email: www.campbellsci.com.au www.campbellsci.fr www.campbellsci.asia Website:...
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