Campbell CNR4, Инструкция по эксплуатации

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CNR4 Net Radiometer
16
FIGURE 7-6. Labels on the pigtail end of the TEMP cable.
7.4 Datalogger Programming
Short Cut is the best source for up-to-date datalogger programming code.
Programming code is needed when:
•
Creating a program for a new datalogger installation
•
Adding sensors to an existing datalogger program
If your data acquisition requirements are simple, you can probably create and
maintain a datalogger program exclusively with Short Cut . If your data
acquisition needs are more complex, the files that
Short Cut
creates are a great
source for programming code to start a new program or add to an existing
custom program.
Short Cut cannot edit programs after they are imported and edited
in CRBasic Editor.
A Short Cut tutorial is available in Section 4 , QuickStart
(p. 2)
. If you wish to
import Short Cut code into CRBasic Editor to create or add to a customized
program, follow the procedure in Appendix A ,
Importing Short Cut Code Into
CRBasic Editor
(p. A-1)
. Programming basics for CRBasic dataloggers are
provided below. Complete program examples for select dataloggers can be
found in Appendix B , Example Programs
(p. B-1)
.
The CNR4 outputs four voltages that typically range from 0 to 15 mV for the
pyranometers, and ± 5 mV for the pyrgeometers. A differential voltage
measurement is recommended because it has better noise rejection than a
single-ended measurement. If differential channels are not available, single-
ended measurements can be used. The acceptability of a single-ended
measurement can be determined by simply comparing the results of single-
ended and differential measurements made under the same conditions.
Additionally, one voltage excitation channel and one single-ended analog
channel are required to make the temperature measurement of the sensor body,
using the thermistor.
NOTE