Campbell 020C, Инструкция по эксплуатации

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020C Wind Direction Sensor
6
7.2 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. 1)
. 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 in the
following section. Complete program examples for select CRBasic dataloggers
can be found in Appendix
B , Example Program
(p. B-1)
.
7.2.1 VoltSE Instruction
The VoltSE() measurement instruction programs the datalogger to measure the
020C.
VoltSE ( Dest, Reps, Range, SEChan, MeasOff, SettlingTime,
Integ /f
notch
, Mult, Offset )
Use 0.072 for the Mult and 0.0 for the Offset . For Range , use mV5000
(CR1000, CR800, CR6, CR3000, CR5000) or mV2500 (CR300). You need to
move a jumper to use the mV2500 range (Section 7.2.1.1 , Output Voltage
(p. 6)
).
If the sensor will be in electrically noisy environments, use 50 Hz or 60 Hz
rejection for
Integ/f
notch
.
If the wind vane will be oriented in a direction other than south,
an offset correction is required. Refer to Appendix
B , Example
Program
(p. B-1)
, for more information.
7.2.1.1 Output Voltage
The default output voltage range is 0 to 5 Vdc, which most Campbell Scientific
dataloggers can measure. For the CR300 datalogger to measure the 020C,
move the jumper block under the outer cover of the main body of the probe.
The outer cover is held in place by friction against two O-rings. To change the
range, carefully slide the outer cover down to expose the circuit board. A set of
three jumper pins is mounted at the top of the board. Set the jumper block over
pins
E1 and 2.5 . This changes the output voltage range to 0 to 2.5 Vdc, which
the CR300 can measure. After changing the jumper, slide the cover into place
over the top O-ring.
NOTE
NOTE