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Apogee SQ-100 Series Owner's Manual

Quantum sensor
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Turfschipper 114 | 2292 JB Wateringen | Tel. 0174 272330 | Fax. 0174 272340 | info@catec.nl | www.catec.nl
OWNER'S MANUAL
QUANTUM SENSOR
Model SQ-100 and SQ-300 Series
APOGEE INSTRUMENTS, INC. 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA
TEL: (435) 792-4700 FAX: (435) 787-8268 WEB: APOGEEINSTRUMENTS.COM
Copyright © 2013 Apogee Instruments, Inc.

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  • Page 1 Turfschipper 114 | 2292 JB Wateringen | Tel. 0174 272330 | Fax. 0174 272340 | info@catec.nl | www.catec.nl OWNER’S MANUAL QUANTUM SENSOR Model SQ-100 and SQ-300 Series APOGEE INSTRUMENTS, INC. 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA TEL: (435) 792-4700 FAX: (435) 787-8268 WEB: APOGEEINSTRUMENTS.COM Copyright © 2013 Apogee Instruments, Inc.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS DECLARATION OF CONFORMITY……………………………..……………………. 3 INTRODUCTION…………………………………………………………………………….. 4 SENSOR MODELS............... 5 SPECIFICATIONS……………………………………………………………………………. 6 DEPLOYMENT AND INSTALLATION……………………………………………….. 9 OPERATION AND MEASUREMENT……………………………………..…………. 10 MAINTENANCE AND RECALIBRATION…………………………………..13 TROUBLESHOOTING AND CUSTOMER SUPPORT…………………………… 15 RETURN POLICY AND WARRANTY…………………………………………………. 16...

  • Page 3: Declaration Of Conformity

    (PBB), polybrominated diphenyls (PBDE). 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

    (transmitted) PPF 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

    Line quantum sensors, SQ-300 series, provide spatially averaged PPF measurements. All sensors along the length of the line are connected in parallel, and as a result, Apogee line quantum sensors output a single voltage signal that is directly proportional to PPF averaged from the location of the individual sensors.

  • Page 6: Specifications

    Pigtail lead wires Calibration Traceability: Apogee SQ series quantum sensors are calibrated through side-by-side comparison to the mean of four Apogee model SQ-110 or SQ-120 transfer standard quantum sensors under high output T5 cool white fluorescent lamps. The transfer standard quantum sensors are calibrated through side-by-side comparison to the mean of at least three LI-COR model LI-190 reference quantum sensors under high output T5 cool white fluorescent lamps.
  • Page 7 schedule with a LI-COR model 1800-02 Optical Radiation Calibrator using a 200 W quartz halogen lamp. The 1800-02 and quartz halogen lamp are traceable to the National Institute of Standards and Technology (NIST). Spectral Response: Mean spectral response of six SQ series error bars represent two quantum sensors ( standard deviations above and below...
  • Page 8 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.

  • Page 9: Deployment And Installation

    Mount the sensor to a solid surface with the nylon mounting screw provided. To accurately measure PPF incident on a horizontal surface, the sensor must be level. An Apogee Instruments model AL-100 leveling plate is recommended for this purpose. To facilitate mounting on a cross arm, an Apogee Instruments model AM-110 mounting bracket is recommended.

  • Page 10: Operation And Measurement

    DO NOT connect the sensor to a power source. The sensor is self- powered and applying voltage will damage the sensor. All Apogee un-amplified quantum sensor models (SQ-100 and SQ-300 series) have a standard PPF calibration factor of exactly: 5.0 µmol m...
  • Page 11 14 % low in sunlight. In addition to PPF measurements, Apogee SQ series quantum sensors can also be used to measure yield photon flux (YPF): photon flux weighted according to the plant photosynthetic action spectrum (McCree, 1972) and summed.
  • Page 12 Spectral Errors for PPF and YPF Measurements with Apogee SQ Series Quantum Sensors Radiation Source (Error Calculated Relative to Sun, Clear Sky) PPF Error YPF Error Sun (Clear Sky) Sun (Cloudy Sky) Reflected from Grass Canopy -6.3 Reflected from Deciduous Canopy -7.0...

  • Page 13: 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 14 Homepage of the Clear Sky Calculator. Two calculators are available: one for quantum sensors (PPF) 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 PPF is returned on right-hand side of page.

  • Page 15: Troubleshooting And Customer Support

    1 mega-ohm there is negligible effect on the calibration, even after adding up to 100 m of cable. All Apogee sensors use shielded, twisted pair cable to minimize electromagnetic interference. For best measurements, the shield wire must be connected to an earth ground.

  • Page 16: Return Policy And Warranty

    RETURN AND WARRANTY POLICY RETURN POLI CY 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.
  • Page 17 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.

This manual is also suitable for:

Sq-300 series

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