LI-COR LI-190R User 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/m2/s
Absolute calibration: ±5%
Output signal: 0 to 20 µA
Linearity: Maximum deviation of 1% up to
10,000 μmol s-1 m-2
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.
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 Terminal
Signal (-) Brown A18
Signal (+) Blue G9
Shield Bare G9
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
photons m-2 s-1 per microamp).
Installation Guide
1

Select a program (Biomet Library) and then enter the cal-
ibration multiplier from the calibration sheet.
Save the configuration and push the file to the data acquis-
ition system after entering the remaining calibration inform-
ation.
Retrieving data
The SmartFlux System will log these data in compressed
files for processing by EddyPro Software and evaluation by
Tovi Software. Data are stored on the USB drive on the
SmartFlux System. Refer to the Data Acquisition System
instruction manual for details.
Maintenance
Keep the surface and vertical edge of the acrylic diffuser
clean. As needed, clean the diffuser sensor with water, mild
detergent, or a diluted vinegar solution using a soft, lint-free
cloth. Do not use alcohol, organic solvents, strong deter-
gents, abrasive solvents, or abrasive cloth on the diffuser.
Return the sensor to LI-COR for factory recalibration every
two years. Contact technical support for more information.
Copyright © 2020 LI-COR, Inc. All rights reserved.
988-12676 Rev 3•10/2020
LI-COR Biosciences
4647 Superior Street
Lincoln, Nebraska 68504
Phone: [phone]
Toll free: 800-447-3576 (U.S. and Canada)
[e-mail]
LI-COR Distributor Network:
www.licor.com/env/distributors
Regional Offices
LI-COR Biosciences GmbH
Siemensstraße 25A
61352 Bad Homburg
Germany
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[e-mail]
LI-COR Biosciences UK Ltd.
St. John’s Innovation Centre
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Cambridge
CB4 0WS
United Kingdom
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[e-mail]