Specifications
Table Of Contents
- Revision and Copyright Information
- Warranty and Assistance
- Table of Contents
- CNR4 Net Radiometer
- 1. General Description
- 2. Sensor Specifications
- 3. Installation
- 4. Using the Optional CNF4 Heater/Ventilator Unit
- 5. Using the CNR4 in the Four Separate Components Mode
- 5.1 Measuring Short-wave Solar Radiation with Pyranometer
- 5.2 Measuring Long-wave Far Infrared Radiation with Pyrgeometer
- 5.3 Measuring CNR4 Temperature with Thermistor
- 5.4 Calculation of Albedo
- 5.5 Calculation of Net Short-wave Radiation
- 5.6 Calculation of Net Long-wave Radiation
- 5.7 Calculation of Net (Total) Radiation
- 6. Wiring
- 7. Datalogger Programming
- 8. Troubleshooting
- 9. Maintenance and Recalibration
- Appendix A. CNR4 Performance and Measurements under Different Conditions
- Appendix B. CNF4 Heater/Ventilator
- Appendix C. CR3000 Program for Measuring Pt-100 Temperature Sensor
- Campbell Scientific Contact Information
Appendix B. CNF4 Heater/Ventilator
B-12
pulling it straight out. Inspect the fan inside for any object that might impede
the fan’s rotation. Upon completing the inspection, put the filter and the cover
back in place.
B.5.3 Replacing the Filter for the Ventilator
The filter needs to be checked for every 6 to 12 months. Remove the black
cover at the bottom side of the ventilator by prying it open with a small flat-
head screw driver or by pulling it straight out. Inspect the filter for dust and
particles that might impede the air flow into the ventilator. The filter can be
cleaned with warm clean water, or can be replaced with the new one. You can
purchase the replacement filters from Campbell Scientific (CSI p/n 26010, a set
of 5).