CS300 Pyranometer
4
8.
If
LoggerNet
,
PC400
,
RTDAQ
, or
PC200W
is running on your PC, and the
PC to datalogger connection is active, you can click Finish in
Short Cut
and
you will be prompted to send the program just created to the datalogger.
9.
If the sensor is connected to the datalogger, as shown in the wiring diagram in
step 6, check the output of the sensor in the datalogger support software data
display to make sure it is making reasonable measurements.
5.
Overview
The CS300 measures incoming solar radiation with a silicon photovoltaic detector
mounted in a cosine-corrected head. Output from the detector is a current, which
is converted to voltage by a potentiometer potted in the sensor head. The
resistance of the potentiometer is adjusted when the sensor is calibrated so that all
sensors have the same output sensitivity.
The CS300 is calibrated against a Kipp and Zonen CM21 under natural sunlight to
accurately measure sun plus sky radiation (360 to 1120 nm). The CS300 should
not be used under vegetation or artificial lights.
During the night, the CS300 may read slightly negative incoming solar radiation.
This negative signal is caused by RF noise passing through the photo-diode.
Negative values may be set to zero in the datalogger program.
For more theoretical information on the silicon photovoltaic detector see Kerr, J.
P., G. W. Thurtell, and C. B. Tanner: An integrating pyranometer for
climatological observer stations and mesoscale networks. J. Appl. Meteor., 6,
688-694.
6.
Specifications
Features:
Designed for continuous, long term, unattended operation in adverse
conditions
Dome-shaped head prevents water from accumulating on the sensor head
Compatible with the CWS900-series interfaces, allowing it to be used in
a wireless sensor network
Compatible with Campbell Scientific CRBasic dataloggers: CR6,
CR200(X) series, CR300 series, CR800 series, CR1000X, CR1000,
CR3000, CR5000, and CR9000(X). Also compatible with Edlog
dataloggers: CR500, CR510, CR10(X), CR23X, CR7, and 21X.
Power requirements:
none, self-powered
Sensitivity:
5 W m
–2
mV
–1
(0.2 mV W
–1
m
–2
)
Absolute accuracy:
±5% for daily total radiation
Cosine correction error:
±5% at 75° zenith angle. ±2% at 45° zenith angle
Response time:
<1 ms
Temperature response:
<1% at 5 to 40 °C
Long-term stability:
<2% per year
Operating temperature:
–40 to +70 °C
Relative humidity:
0 to 100%
