Campbell Scientific CNR4 Net Radiometer - Manual (Page 6)

Table of Contents
8. Troubleshooting........................................................30
8.1 Testing the Pyranometer.................................................................... 30
8.2 Testing the Pyrgeometer.................................................................... 31
8.3 Testing the Thermistor ...................................................................... 31
8.4 Testing the Pt-100 ............................................................................. 31
9. Maintenance and Recalibration ...............................32
9.1 Cleaning Windows and Domes ......................................................... 32
9.2 Recalibration ..................................................................................... 32
9.3 Replacing the Drying Cartridge......................................................... 32
9.4 Replacement Parts ............................................................................. 33
Appendices
A. CNR4 Performance and Measurements under
Different Conditions .............................................A-1
B. CNF4 Heater/Ventilator ...........................................B-1
B.1 General Information ........................................................................ B-1
B.2 Attaching the Optional CNF4 Heater/Ventilator Unit to CNR4...... B-3
B.3 Wiring.............................................................................................. B-7
B.4 Example B, CR3000 Datalogger Program with Heater/
Ventilator Control ........................................................................ B-8
B.5 CNF4 Heater/Ventilator Maintenance........................................... B-11
B.5.1 Testing the Heater .................................................................. B-11
B.5.2 Testing the Ventilator............................................................. B-11
B.5.3 Replacing the Filter for the Ventilator.................................... B-11
C. CR3000 Program for Measuring Pt-100
Temperature Sensor.............................................C-1
Figures
4-1. Attaching the mounting rod to the CNR4 body................................... 2
4-2. Attaching the CNR4 onto the mounting rod (pn 26120) using
vertical pole or horizontal crossarm................................................. 3
6-1. The CNR4 net radiometer with cables and mounting rod, top view.... 9
6-2. The CNR4 net radiometer with CNF 4 heater/ventilator unit, top
view.................................................................................................. 9
7-1. The CNR4 sensor with SOLAR and TEMP cables ........................... 18
7-2. The marks on the end of the CNR4: S for SOLAR cable, and T
for TEMP cable.............................................................................. 19
7-3. Labels on the pigtail end of the SOLAR cable .................................. 19
7-4. Labels on the pigtail end of the TEMP cable. ................................... 20
9-1. Replacing the drying cartridge .......................................................... 33
A-1. Different measurement conditions and signals................................ A-2
A-2. Partly cloudy day for the upward facing pyrgeometer..................... A-2
A-3. Clear day for the downward facing pyrgeometer ............................ A-3
B-1. CNF4 package contents................................................................... B-3
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