Campbell-scientific CNR4 Net Radiometer Uživatelský manuál Strana 1

CNR4 Net RadiometerRevision: 9/13 Copyright © 2000-2013Campbell Scientific, Inc.

CNR4 Net Radiometer 4. Quickstart Please review Section 7, Operation, for wiring and CRBasic programming. Appendix B, CNF4 Heater/Ventilator, provid

CNR4 Net Radiometer 2. Attach the 26120 mounting bracket to the vertical mounting pipe, or CM200-series crossarm using the provided U-bolt (see FIGUR

CNR4 Net Radiometer 6. Perform the fine leveling using the two spring-loaded leveling screws—one on the front and the other on the back of the bracke

CNR4 Net Radiometer 2. Select the datalogger and enter the scan interval. 3. Select CNR4 Net Radiometer, and select the right arrow (in center of s

CNR4 Net Radiometer 4. Enter the sensitivity values supplied on the manufacturer’s certificate of calibration; these sensitivity values are unique to

CNR4 Net Radiometer 7. In the Confirm window, click Yes to download the program to the datalogger. 8. Click on Wiring Diagram and wire according to

CNR4 Net Radiometer and is resistant to a variety of pollutants and UV-radiation. The mounting rod can be unscrewed for transport. An optional ventil

CNR4 Net Radiometer The properties of the CNR4 are mainly determined by the properties of the individual probes. Generally the accuracy of the CNR4 w

CNR4 Net Radiometer 6.1 CNR4 Specifications Sensor sensitivities: Four probes with unique sensitivity values. Please refer to the calibration sheets

CNR4 Net Radiometer Directional error*: < 20 W/m2 at angle up to 80° with 1000 W/m2 Zero offset due to 0 to -200 W/m2 IR net irradiance*: < 15

CNR4 Net Radiometer Field of view Upper: Lower: 180 degrees 150 degrees Net-irradiance: –250 to +250 W/m2 Non-stability: < 1% (sensitivity change

CNR4 Net Radiometer 7. Operation 7.1 Using the CNR4 in the Four Separate Components Mode In the four separate components mode configuration (measuri

CNR4 Net Radiometer For the pyrgeometer only E = V/C + 5.67•10-8•T4 (7-2) In this equation, C is the sensitivity of the sensor. T is in Kelvin,

CNR4 Net Radiometer TABLE 7-1. Resistance values versus CNR4’s thermistor temperature in °C. Temperature [°C] Resistance[Ω] Temperature[°C] Resistanc

CNR4 Net Radiometer TABLE 7–2. Resistance values versus CNR4’s Pt–100 temperature in °C. Temperature [°C] Resistance[Ω] Temperature[°C] Resistance[Ω

CNR4 Net Radiometer Albedo will always be smaller than 1. Checking this can be used as a tool for quality assurance of your data. If you know the ap

CNR4 Net Radiometer 7.1.7 Calculation of Net (Total) Radiation In the four separate components mode, net radiation, Rn, can be calculated using the i

CNR4 Net Radiometer FIGURE 7-2. The marks on the end of the CNR4: S for SOLAR cable, and T for TEMP cable The measurement details for Pt-100 sensor,

CNR4 Net Radiometer FIGURE 7-4. Labels on the pigtail end of the TEMP cable. TABLE 7-3. Datalogger Connections for Differential Measurement Functio

CNR4 Net Radiometer 7.3 Datalogger Pro ming single-ended measurement. If differential channels are not available, single-ptability of a single-ended

Warranty “PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in materi

CNR4 Net Radiometer Average short-wave net radiation Average long-wave net radiation Average albedo Average net radiation 'CR1000 Series Da

CNR4 Net Radiometer Units logger_temp = d gC eUnits batt_volt s = voltUnits short_up = W/m^2Units short_dn = W/m^2Units long_up = W/m^2 Units lon

CNR4 Net Radiometer Scan (1,Sec,3,0) PanelTemp (logger_temp,250) Battery (batt_volt) 'CNR4 radiation measurements VoltDiff (cnr4(

CNR4 Net Radiometer 'CR3000 Series Datalogger ' 'CNR4 program 'This program measures CNR4 four-component net radiometer 'This

CNR4 Net Radiometer Units long_up_corr = W/m^2 Units long_dn_corr = W/m^2 Units Rs_net = W/m^2 Units Rl_net = W/m^2 Units albedo = W/m^2 Units Rn = W/

CNR4 Net Radiometer 'CNR4 thermistor measurement BrHalf (Vs_Vx,1,mv5000,16,Vx1,1,2500,True ,0,250,1.0,0) Rs = 1000*(Vs_Vx/(1-

CNR4 Net Radiometer 'CR5000 Series Datalogger ' 'CNR4 program 'This program measures CNR4 four-component net radiometer 'Thi

CNR4 Net Radiometer Units cnr4_T_K = K Units long_up_corr = W/m^2 Units long_dn_corr = W/m^2 Units Rs_net = W/m^2 Units Rl_net = W/m^2 Units albedo =

CNR4 Net Radiometer 'Convert CNR4 temperature to Kelvin cnr4_T_K = cnr4_T_C+273.15 'Correct the long-wave

CNR4 Net Radiometer voltmeter to its most sensitive range setting. Darken the sensor. The signal n take up to one minute. Small deviations al effec

Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing

CNR4 Net Radiometer 9. Maintenancen. 9.1 Cleaning W9.2 Recalibrate uthorized Kipp & Zonen calibration facility. librated every two years. Alt

CNR4 Net Radiometer 33 FIGURE 9-1. Replacing the drying cartridge nt Parts The following is the list of replacement9.4 Replaceme parts for the CNR4

CNR4 Net Radiometer 34

Appendix A. CNR4 Performance and Measurements under Different Conditions TABLE A-1 shows what one might typically expect to measure under different

Appendix A. CNR4 Performance and Measurements under Different Conditions upwellingsignal(downwardfacing)pyrgeometer2030‐30‐20‐100100:00:001:00:00

Appendix A. CNR4 Performance and Measurements under Different Conditions 4/181067.5CG3upper EeTemperaturSky ⎥⎦⎤⎢⎣⎡⋅=−A-4 (A-1) 4/181067.5⎥⎦⎤⎢⎣⎡⋅

Appendix B. CNF4 Heater/Ventilator Whenever the heater is used, the heating may cause errors in the measurement of the sensor temperature. Under mos

Appendix B. CNF4 Heater/Ventilator Appendix B. CNF4 Heater/Ventilator 10 watt power available? Not available DO NOT HEAT Available Consider optio

Appendix B. CNF4 Heater/Ventilator B.2 Attaching the Optional CNF4 Heater/VentilatoUnit to CNR4 r with 1. The CNF4 heater/ventilator unit comes w

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 spec

Appendix B. CNF4 Heater/Ventilator 2. Attach the heater/ventilator unit unto the bottom of the CNR4 sensor, using the t ws and washers, as shown in

Appendix B. CNF4 Heater/Ventilator 3. Make sure the cables are cleared from the edges of the CNF4, as showFIGURE B-3, and place the white solar shie

Appendix B. CNF4 Heater/Ventilator FIGURE B-5. Attaching the solar shield to CNF4 using four flat-head screws 4. Once the CNF4 heater/ventilator u

Appendix B. CNF4 Heater/Ventilator B.3 Wiring aking the differential measurement. TABLE B-1. CR1000 and CR3000 Datalogger Connections for Differenti

Appendix B. CNF4 Heater/Ventilator B.4 Example B, CR3000 Datalogger Program with Heater/Ventilator Control Example B measures the four radiation out

Appendix B. CNF4 Heater/Ventilator '8H '8L CNR4 thermistor signal (white) 'gnd CNR4 thermistor signal reference (black)

Appendix B. CNF4 Heater/Ventilator 'CNR4 multipliers Public cnr4_mult(4) Const pyranometer_up_mult = 1000/pyranometer_up_sensitivity '(W/

Appendix B. CNF4 Heater/Ventilator 'Compute net radiation Rn = Rs_net + Rl_net 'CNF4 ventilator con

Appendix B. CNF4 Heater/Ventilator B-12

Appe gram for Measuring Pt-100 Temperature Sensor ndix C. CR3000 ProExample C measures the Pt-100 senso te perature of the C R4. gram requ s four

Table of Contents 8. Troubleshooting...30 8.1 Testing the Pyranometer...

Appendix C. CR3000 Program for Measuring Pt-100 Temperature Sensor 'CR3000 Series Dat logger a' 'CNR4 program 'This program meas

Appendix C. CR3000 Program for Measuring Pt-100 Temperature Sensor Units cnr4_T_K = K Units long_up_corr = W/m^2 Units long_dn_corr = W/m^2 Units Rs_

Appendix C. CR3000 Program for Measuring Pt-100 Temperature Sensor C-4 easurement 'PRT (Pt-100) temperature m Resistance (cnr4_prt_R,1

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Table of Contents B-2. Attaching the CNF4 to CNR4 using pan-head screws and washers ...

Table of Contents iv

CNR4 Net Radiometer 1. Introduction The CNR4 is a research-grade net radiometer that measures the energy balance between incoming and outgoing radia