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Summary of Contents for Apogee Instruments SU-100
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Page 1: Owner's Manual
OWNER’S MANUAL ULTRAVIOLET SENSOR Model SU-100 (including SS model) APOGEE INSTRUMENTS, INC. | 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM Copyright © 2019 Apogee Instruments, Inc. -
Page 2: Table Of Contents
TABLE OF CONTENTS Owner’s Manual ....................................1 Certificate of Compliance ................................. 3 Introduction ..................................... 4 Sensor Models ..................................5 Specifications ................................... 6 Deployment and Installation ..............................7 Cable Connectors ..................................8 Operation and Measurement ..............................9 Maintenance and Recalibration ............................. 12 Troubleshooting and Customer Support .......................... -
Page 3: Certificate Of Compliance
RoHS 3 compliant using exemption 6c. Further note that Apogee Instruments does not specifically run any analysis on our raw materials or end products for the presence of these substances, but rely on the information provided to us by our material suppliers. -
Page 4: Introduction
Most UV sensors designed for sunlight measurements are sensitive to UV radiation in the UV-A and UV-B ranges. Apogee Instruments SU-100 UV sensors detect UV radiation from 250 to 400 nm and are calibrated in photon flux units of micromoles per square meter per second (µmol m ). -
Page 5: Sensor Models
SENSOR MODELS The SU-100 UV sensor is the only stand-alone UV sensor offered by Apogee Instruments. Additional models are covered in their respective manuals. Model Signal SU-100 Self-powered SU-420 Sensor model number and serial number are located near the pigtail leads on the sensor cable. -
Page 6: Specifications
Calibration Traceability Apogee SU-100 UV sensors are calibrated through side-by-side comparison to the mean of three Apogee model SU-100 transfer standard UV sensors under high intensity discharge metal halide lamps. The transfer standard UV sensors are calibrated through side-by-side comparison to an Apogee model PS-200 spectroradiometer under sunlight (clear sky conditions) in Logan, Utah. -
Page 7: Deployment And Installation
Mount the sensor to a solid surface with the nylon mounting screw provided. To accurately measure PPFD incident on a horizontal surface, the sensor must be level. An Apogee Instruments model AL-100 Leveling Plate is recommended to level the sensor when used on a flat surface or being mounted to surfaces such as wood. To facilitate mounting on a mast or pipe, the Apogee Instruments model AL-120 Solar Mounting Bracket with Leveling Plate is recommended. -
Page 8: Cable Connectors
CABLE CONNECTORS Apogee started offering in-line cable connectors on some bare-lead sensors in March 2018 to simplify the process of removing sensors from weather stations for calibration (the entire cable does not have to be removed from the station and shipped with the sensor). The ruggedized M8 connectors are rated IP68, made of corrosion-resistant marine-grade stainless-steel, and designed for extended use in harsh environmental... -
Page 9: Operation And Measurement
30 cm from the sensor head then use the appropriate wiring configuration below. Wiring for SU-100 Serial Numbers 2482 and above or with a cable connector Black: Negative (signal from sensor) - Page 10 3 % of the UV photons are in this range. Because only a small fraction of the photons are in the UV-B range, the SU-100 cannot be used to selectively measure UV-B radiation.
- Page 11 Spectral Errors for UV Radiation Measurements with Apogee SU-100 UV Sensors Radiation Source (Error Calculated Relative to Sun, Clear Sky) Error [%] Sun (Clear Sky) Sun (Cloudy Sky) < 0.5 Reflected from Grass Canopy < 0.5 Reflected from Deciduous Canopy <...
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Page 12: Maintenance And Recalibration
MAINTENANCE AND RECALIBRATION Moisture or debris on the sensor is a common cause of low readings. The sensor has a domed-shaped housing for improved self-cleaning from rainfall, but materials can accumulate on the photo-sensitive area (e.g., dust during periods of low rainfall, salt deposits from evaporation of sea spray or sprinkler irrigation water) and partially block the optical path. - Page 13 Homepage of the Clear Sky Calculator. Two calculators are available: One for pyranometers (total shortwave radiation) and one for quantum sensors (photosynthetic photon flux density). Clear Sky Calculator for pyranometers. Site data are input in blue cells in middle of page and an estimate of total shortwave radiation is returned on right-hand side of page.
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Page 14: Troubleshooting And Customer Support
TROUBLESHOOTING AND CUSTOMER SUPPORT Independent Verification of Functionality Apogee SU-100 sensors are self-powered devices and output a voltage signal proportional to incident UV radiation. A quick and easy check of sensor functionality can be determined using a voltmeter with millivolt resolution. -
Page 15: Return And Warranty Policy
RETURN AND WARRANTY POLICY RETURN POLICY Apogee Instruments will accept returns within 30 days of purchase as long as the product is in new condition (to be determined by Apogee). Returns are subject to a 10 % restocking fee. WARRANTY POLICY... - Page 16 5. Upon receipt, Apogee Instruments will determine the cause of failure. If the product is found to be defective in terms of operation to the published specifications due to a failure of product materials or craftsmanship, Apogee Instruments will repair or replace the items free of charge.
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