li-190sa quantum sensor li-190sa quantum sensor

OPTICAL RADIATION CALIBRATOR
• Spectral irradiance, irradiance, illuminance
and photon flux calibrations.
• For calibration of LI-COR Spectroradiometers,
quantum sensors and photometric sensors.
• Simple operation.
• Eliminates complex optical alignments and
expensive laboratory calibration equipment.
The 1800-02 is a self-contained optical radiation calibrator for
on-site spectral irradiance, irradiance, photon flux, or
illuminance calibrations in the 300-1100 nm wavelength range.
The 1800-02 integrates a quartz tungsten halogen lamp and a
highly regulated power supply into a portable package that acts
as an optical bench and darkroom. The 1800-02 can be
operated under normal lighting conditions and requires no
special facilities.
THE LAMP
The 1800-02 utilizes a 200 Watt quartz tungsten halogen lamp
operated at an approximate color temperature of 3150° Kelvin.
The tungsten halogen lamp provides the best available spectral
distribution for calibrations in the 300-1100 nm wavelength
range. Lamp calibrations are determined by using a temperature
controlled spectroradiometer to compare readings over the 300-
1100 nm wavelength range taken from the 1800-02 and the
working standard calibration lamp used in LI-COR's laboratory
calibration system. LI-COR's working standard quartz halogen
lamps have been calibrated against reference standard lamps
traceable to NIST. Calibration accuracy of the 1800-02 is
± 4.0% from 300-1100 nm.
POWER SUPPLY
The1800-02 has a highly regulated power supply which maintains
constant power to the lamp by regulating both current and
voltage. Regulating both current and voltage results in added
lamp stability.
When the 1800-02 is turned on, the lamp is powered up slowly
to prevent filament shock and a ready light indicates when the
lamp is within normal operating conditions. The lamp is protected
by a built-in over current protector which shuts off the
power supply in case of malfunction. Automatic shutoff also
occurs if the line voltage falls too low to maintain accurate regulation,
thereby preventing false calibration data. External jacks
for monitoring lamp current and voltage through a precision calibrated
shunt are provided to allow user verification of lamp stability.
OPERATION
Operation of the 1800-02 is a simple 3 step process.
1) Turn the 1800-02 on and allow 5 minutes after the
"ready” light comes on for the lamp to reach complete
thermal stability.
2) Install the sensor or spectroradiometer in the instrument
port using the appropriate mounting fixture (provided).
3) Read the sensor (or scan the lamp with a
spectroradiometer) and determine the calibration
constant from the lamp calibration data.
Sensor calibrations are performed using the sensor mounting fixture
which holds the sensor in a precise location and eliminates
the need to align the sensor within the calibration system. Both
terrestrial and underwater sensors can be calibrated using the
appropriate mounting fixture.
The 1800-02 can be used to recalibrate the LI-1800 Portable
Spectroradiometer, the LI-1800UW Underwater Spectroradiometer,
the 1800-11 Remote Cosine Receptor or the LI-COR
radiation sensors listed below.
Quantum: LI-190SB, LI-190SA, LI-190SZ
Underwater Quantum: LI-192SB, LI-192SA
Photometric: LI-210SB, LI-210SA, LI-210SZ
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