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Related Manuals for Apogee Instruments SQ-100 Series
Summary of Contents for Apogee Instruments SQ-100 Series
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Page 1: Owner's Manual
OWNER’S MANUAL QUANTUM SENSOR Models SQ-100 and SQ-300 Series Rev: 30-Mar-2022 APOGEE INSTRUMENTS, INC. | 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM Copyright © 2022 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 ..............................9 Cable Connectors ................................... 10 Operation and Measurement ..............................11 Maintenance and Recalibration ............................. 15 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 we rely on the information provided to us by our material suppliers. -
Page 4: Introduction
(transmitted) PPFD measurement in the same environments. Apogee Instruments SQ series quantum sensors consist of a cast acrylic diffuser (filter), photodiode, and signal processing circuitry mounted in an anodized aluminum housing, and a cable to connect the sensor to a measurement device. -
Page 5: Sensor Models
SENSOR MODELS This manual covers the unamplified models SQ-100 series and SQ-300 series. Additional models are covered in their respective manuals. Model Signal Calibration SQ-110 Self-powered Sunlight SQ-120 Self-powered Electric light SQ-311 Self-powered Sunlight SQ-321 Self-powered Electric light SQ-313 Self-powered... -
Page 6: Specifications
SPECIFICATIONS SQ-100-SS Series SQ-313/316/323/326-SS* SQ-311/321-SS* Power Supply Self-powered Sensitivity 0.2 mV per µmol m Calibration Factor 5 µmol m per mV (Reciprocal of Sensitivity) Calibration Uncertainty ± 5 % (see Calibration Traceability below) Calibrated Output Range 0 to 800 mV Measurement Less than 0.5 % Repeatability... - Page 7 Spectral Response Mean spectral response of six SQ series quantum sensors (error bars represent two standard deviations above and below mean) compared to PPFD weighting function. Spectral response measurements were made at 10 nm increments across a wavelength range of 300 to 800 nm in a monochromator with an attached electric light source.
- Page 8 Cosine Response Directional, or cosine, response is defined as the measurement error at a specific angle of radiation incidence. Error for Apogee SQ series quantum sensors is approximately ± 2 % and ± 5 % at solar zenith angles of 45° and 75°, respectively. Mean cosine response of twenty- three SQ series quantum sensors (error bars represent two...
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Page 9: Deployment And Installation
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 10: Cable Connectors
CABLE CONNECTORS Apogee sensors offer cable connectors 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 conditions. -
Page 11: Operation And Measurement
OPERATION AND MEASUREMENT Connect the sensor to a measurement device (meter, datalogger, controller) capable of measuring and displaying or recording a millivolt signal (an input measurement range of approximately 0-500 mV is required to cover the entire range of PPFD from the sun). In order to maximize measurement resolution and signal-to-noise ratio, the input range of the measurement device should closely match the output range of the quantum sensor. - Page 12 Sensor Calibration All Apogee un-amplified quantum sensor models (SQ-100 and SQ-300 series) have a standard PPFD calibration factor of exactly: 5.0 µmol m per mV Multiply this calibration factor by the measured mV signal to convert sensor output to PPFD in units of µmol m Calibration Factor (5.0 µmol m per mV) * Sensor Output Signal (mV) = PPFD (µmol m 2000...
- Page 13 Spectral Errors and Yield Photon Flux Measurements Apogee quantum sensors are calibrated to measure PPFD for either sunlight or electric light. The difference between the calibrations is 12 %. A sensor calibrated for electric lights (calibration source is T5 cool white fluorescent lamps) will read approximately 12 % low in sunlight.
- Page 14 Spectral Errors for PPFD and YPFD Measurements with Apogee SQ Series Quantum Sensors Radiation Source (Error Calculated Relative to Sun, Clear Sky) PPFD Error [%] YPFD Error [%] Sun (Clear Sky) Sun (Cloudy Sky) Reflected from Grass Canopy -6.3 Reflected from Deciduous Canopy -7.0 Reflected from Conifer Canopy -6.8...
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Page 15: Maintenance And Recalibration
MAINTENANCE AND RECALIBRATION Moisture or debris on the diffuser is a common cause of low readings. The sensor has a domed diffuser and housing for improved self-cleaning from rainfall, but materials can accumulate on the diffuser (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 16 Homepage of the Clear Sky Calculator. Two calculators are available: one for quantum sensors (PPFD) and one for pyranometers (total shortwave radiation). Clear Sky Calculator for quantum sensors. Site data are input in blue cells in middle of page and an estimate of PPFD is returned on right-hand side of page.
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Page 17: Troubleshooting And Customer Support
TROUBLESHOOTING AND CUSTOMER SUPPORT Independent Verification of Functionality Apogee SQ-100 and SQ-300 series quantum sensors are self-powered devices and output a voltage signal proportional to incident PPFD. A quick and easy check of sensor functionality can be determined using a voltmeter with millivolt resolution. -
Page 18: 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 19 84321, USA 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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Page 20: Appendix
APPENDIX The spectral response of the SQ-300 series line quantum sensors changed in May 2021. Below is the updated information. Serial Numbers The information below applies to these SQ-300 series sensors: SQ-311 serial #’s 3557 and above SQ-313 and SQ-316 serial #’s 3566 and above Spectral Response for SQ-300 series sensors: SQ-311 serial #’s 3557 and above, SQ-313 and SQ-316 serial #’s 3566 and above Spectral response of updated line...
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What are the following parameters for your navigation Quantume sensors. Phase Noise (dBc/Hz) Short term stability (ppt) Aging (ppt) Power consumption (W) Size (cm^3)