Campbell Scientific LI200X-LC User Manual
INSTRUCTION MANUAL
LI200X-LC Pyranometer
for MetData1
4/97
Copyright (c) 1994-1997
Campbell Scientific, Inc.
Warranty and Assistance
The LI200X-LC PYRANOMETER FOR METDATA1 is warranted by
CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and
workmanship under normal use and service for twelve (12) months from date
of shipment unless specified otherwise. Batteries have no warranty.
CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to
repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective
products. The customer shall assume all costs of removing, reinstalling, and
shipping defective products to CAMPBELL SCIENTIFIC, INC. CAMPBELL
SCIENTIFIC, INC. will return such products by surface carrier prepaid. This
warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. products
which have been subjected to modification, misuse, neglect, accidents of
nature, or shipping damage. This warranty is in lieu of all other warranties,
expressed or implied, including warranties of merchantability or fitness for a
particular purpose. CAMPBELL SCIENTIFIC, INC. is not liable for special,
indirect, incidental, or consequential damages.
Products may not be returned without prior authorization. The following
act information is for US and International customers residing in countries
cont
served by Campbell Scientific, Inc. directly. Affiliate companies handle
repairs for customers within their territories. Please visit
www.campbellsci.com to determine which Campbell Scientific company
serves your country. To obtain a Returned Materials Authorization (RMA),
contact CAMPBELL SCIENTIFIC, INC., phone (435) 753-2342. After an
applications engineer determines the nature of the problem, an RMA number
will be issued. Please write this number clearly on the outside of the shipping
container. CAMPBELL SCIENTIFIC's shipping address is:
CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 W
Logan, Ut
CAMPBELL SCIENTIFIC, INC. does not accept collect calls.
est 1800 North
ah 84321-1784
LI200X-LC PYRANOMETER
FOR METDATA1
1. GENERAL
The LI200X measures incoming solar radiation
with a silicon photovoltaic detector mounted in
cosine-corrected head. The detector outputs
current; a shunt resistor in the sensor cable
converts the signal from current to voltage,
allowing the LI200X to be measured directly by
Campbell Scientific dataloggers. The LI200X is
calibrated against an Eppley Precision Spectral
Pyranometer to accurately measure sun plus
sky radiation. Do not use the LI200X under
vegetation or artificial lights, because it is
calibrated for the daylight spectrum (400 to
1100 nm).
During the night the LI200X may read slightly
negative incoming solar radiation. This negative
signal is caused by RF noise. 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.
688-694.
1.1 SPECIFICATIONS
Stability: < ±2% change over a 1
Response Time: 10 µs
Cosine Correction: Cosine corrected up to 80°
Operating
Temperature: -40 to +65 °C
Temperature
Dependence: 0.15% per °C
J. Appl. Meteor.
year period
, 6,
Weight: 1 oz. (28 g)
Accuracy: Absolute error in natural
daylight is ±5% maximum;
±3% typical
-2
-1
Sensitivity: 0.2 kW m
Linearity: Maximum deviation of 1%
up to 3000 W m
Shunt Resistor: Adjustable, 40.2 to 90.2 Ω,
factory set to give the
above sensitivity
Light Spectrum
Waveband: 400 to 1100 nm
NOTE: The black outer jacket of the cable
is Santoprene® rubber. This compound was
chosen for its resistance to temperature
extremes, moisture, and UV degradation.
However, this jacket will support
combustion in air. It is rated as slow
burning when tested according to U.L. 94
H.B. and will pass FMVSS302. Local fire
codes may preclude its use inside buildings.
mV
-2
2. INSTALLATION
To ensure accurate measurements, the LI200X
should be mounted using LI2003S base/leveling
fixture. This base incorporates a bubble level
and three adjustment screws. The LI200X and
base/leveling fixture are attached to a tripod or
tower using one of three mounting
configurations (see Figure 2-1 through 2-3).
The LI200X should be mounted such that it is
never shaded by the tripod/tower or other
sensors.
Relative Humidity: 0 to 100%
Detector: High stability silicon
photovoltaic detector (blue
enhanced)
Sensor Housing: Weatherproof anodized
aluminum case with acrylic
diffuser and stainless steel
hardware
Size: 0.94" dia x 1.00" H (2.38 cm
dia x 2.54 cm H)
NOTE:
the sensor. Save this cap for shipping or
storing the sensor.
Remove the red cap after installing
1
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