LI-COR LI-190R Installation Manual

Installing the LI-190R Quantum Sensor
in Biomet Systems
The LI-190R quantum sensor (part number 7900-190) meas-
ures photosynthetically active radiation (PAR). Here we
provide basic installation and operation instructions for
using the LI-190R in a LI-COR biomet data acquisition sys-
tem.
LI-190R Specifications:
Spectral response: 400 to 700 nm
Energy range: 0 to 2000 µmol/m
Absolute calibration: ±5%
Output signal: 0 to 20 µA
Linearity: Maximum deviation of 1% up to
10,000 μmol s
Cosine correction: Up to 80° angle of incidence
Azimuth error: <1% over 360° at a 45° elevation angle
Cable lengths: 5 and 50 meters
Siting the quantum sensor
Position the LI-190R so it will never be under a shadow,
either from the surrounding landscape elements or from the
tower itself. Mount the sensor on the tower to minimize
reflected radiation that is visible to the sensor.
2
/s
-1 -2
m
Mounting the quantum sensor
Mount the LI-190R in the mounting and leveling fixture
(2003S). Attach the 2003S to the 7900-350 radiation sensor
bracket and level the 2003S. Secure the cable to the tower
using zip-ties.
Wiring the quantum sensor
The bare leads connect directly to the DAqM.
Description Wire Color
Signal (-) Brown
Signal (+) Blue
Shield Bare
If you want to connect the LI-190R to a channel other than
A17 or A18, a millivolt adapter is required.
Entering calibration data
Enter the calibration multiplier in the Blueprint Utility soft-
ware. The multiplier on the calibration certificate is under
For use with LI-COR handheld meters and loggers: (units are µmol
-2 -1
photons m s per microamp).
Installation Guide
Terminal
A18
G9
G9
1