Campbell CNR4, Инструкция по эксплуатации

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Appendix B. Example Programs
B-10
B.4 CR3000 Program for Measuring Pt-100
Temperature Sensor
This example measures the Pt-100 sensor for the body temperature of the
CNR4. This program requires four differential channels to measure the four
radiation outputs, one current excitation channel, and one differential channel
for Pt-100 measurement. The program measures the sensors every 1 second,
performs the online processing of the data, and stores the following processed
data to a data table called cnr4_data once every 60 minutes. It also stores the
raw time-series data from CNR4 to data table called cnr4_ts.
Minimum battery voltage
Sample datalogger panel temperature
Average short-wave radiation (pyranometer up)
Average short-wave radiation (pyranometer down)
Average long-wave radiation (pyrgeometer up)
Average long-wave radiation (pyrgeometer down)
Average CNR4 thermistor temperature (degrees C)
Average CNR4 thermistor temperature (Kelvin)
Average corrected long-wave radiation (pyrgeometer up)
Average corrected long-wave radiation (pyrgeometer down)
Average short-wave net radiation
Average long-wave net radiation
Average albedo
Average net radiation
TABLE B-1. Datalogger Connections for Differential Measurement with Pt-100 1
Function Wire Color CR3000/CR5000
Pyranometer Up Signal Red Differential Input (H)
Pyranometer Up Reference Blue 2 Differential Input (L)
Pyranometer Down Signal White Differential Input (H)
Pyranometer Down Reference Black 2 Differential Input (L)
Pyrgeometer Up Signal Grey Differential Input (H)
Pyrgeometer Up Reference Yellow 2 Differential Input (L)
Pyrgeometer Down Signal Brown Differential Input (H)
Pyrgeometer Down Reference Green 2 Differential Input (L)
Shield Clear
⏚
PRT (Pt-100) Current Excitation Grey Current Excitation (IX)
PRT (Pt-100) Current Return Brown Current Excitation Return (IXR)
PRT (Pt-100) Signal Green Differential Input (H)
PRT (Pt-100) Signal Reference Yellow Differential Input (L)
Shield Clear
⏚
1 Pull back wires for thermistor (white, red, and black), which are not in use, and tie them around the TEMP cable using a
cable tie or electrical tape to avoid possible damage to the thermistor, due to electrical short circuit.
2 Jumper to ⏚ with user-supplied wire.