Table of Contents
Related Manuals for Apogee SQ-617
Summary of Contents for Apogee SQ-617
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Page 1: Owner's Manual
OWNER’S MANUAL EPAR SENSOR Model SQ-617 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 ............................... 6 Specifications ................................. 6 Deployment and Installation ..........................10 Cable Connectors ..............................10 Operation and Measurement ..........................12 Maintenance and Recalibration .......................... 18 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
383-757 nm ± 5 nm, which allows it to measure photons from Far-red. Apogee Instruments SQ-600 series ePAR sensors consist of a cast acrylic diffuser (filter), photodiode, and signal processing circuitry mounted in an anodized aluminum housing. A cable to connect the sensor to a measurement device is also included. - Page 5 Murakami et al. 2018. A Mathematical Model of Photosynthetic Electron Transport in Response to the Light Spectrum Based on Excitation Energy Distributed to Photosystems. Plant Cell Physiology. 59(8): 1643–1651. Zhen and Van Iersel. 2017. Far-red light is needed for efficient photochemistry and photosynthesis. Journal of Plant Physiology.
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Page 6: Sensor Models
SENSOR MODELS This manual covers the digital model SQ-617 ePAR SDI-12 Sensor (in bold below). Additional models are covered in their respective manuals. Model Signal SQ-610 Self-powered SQ-612 0-2.5 V SQ-614 4-20 mA SQ-615 0-5 V SQ-616 SQ-617 SDI-12 SQ-618 Modbus A sensor’s model number and serial number are located... -
Page 7: Specifications
4 years against defects in materials and workmanship Calibration Traceability Apogee Instruments SQ-600 series ePAR sensors are calibrated through side-by-side comparison to the mean of four transfer standard sensors under a reference lamp. The transfer standard sensors are recalibrated with a... - Page 8 Spectral Response Mean spectral response measurements of four replicate Apogee SQ-600 series ePAR Sensors. Incremental spectral response measurements were made at 10 nm increments across a wavelength range of 370 to 800 nm in a monochromator with an attached electric light source.
- Page 9 Directional, or cosine, response is defined as the measurement error at a specific angle of radiation incidence. Error for Apogee SQ-600 series ePAR Sensor is approximately ± 2 % and ± 5 % at solar zenith angles of 45° and 75°, respectively.
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Page 10: Deployment And Installation
An Apogee Instruments model AL-100 leveling plate is recommended for this purpose. To facilitate mounting on a cross arm, an Apogee Instruments model AL- 120 mounting bracket is recommended. -
Page 11: Cable Connectors
CABLE CONNECTORS Apogee offers 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,... -
Page 12: Operation And Measurement
“!”. SDI-12 language supports a variety of commands. Supported commands for the Apogee Instruments SQ-617 ePAR sensors are listed in the following table (“a” is the sensor address. The following ASCII Characters are valid addresses: “0-9” or “A-Z”). - Page 13 Supported Commands for Apogee Instruments SQ-617 ePAR Sensors Instruction Name Instruction Syntax Description Acknowledge Active Command Responds if the sensor with address a is on the line Send Identification Command Responds with sensor information Measurement Command Tells the sensor to take a measurement...
- Page 14 Make Measurement Command: M! The make measurement command signals a measurement sequence to be performed. Data values generated in response to this command are stored in the sensor's buffer for subsequent collection using “D” commands. Data will be retained in sensor storage until another “M”, “C”, or “V” command is executed.
- Page 15 Concurrent Measurement Command: aC! A concurrent measurement is one which occurs while other SDI-12 sensors on the bus are also making measurements. This command is similar to the “aM!” command, however, the nn field has an extra digit and the sensor does not issue a service request when it has completed the measurement.
- Page 16 Change Sensor Address: aAb! The change sensor address command allows the sensor address to be changed. If multiple SDI-12 devices are on the same bus, each device will require a unique SDI-12 address. For example, two SDI-12 sensors with the factory address of 0 requires changing the address on one of the sensors to a non-zero value in order for both sensors to communicate properly on the same channel: Command...
- Page 17 Apogee SQ-610 series ePAR sensors have an immersion effect correction factor of 1.25. This correction factor should be multiplied by PPFD measurements made underwater to yield accurate PPFD.
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Page 18: Maintenance And Recalibration
Never use abrasive material or cleaner on the diffuser. It is recommended that sensors be recalibrated every two years. See the Apogee webpage for details regarding return of sensors for recalibration (http://www.apogeeinstruments.com/tech-support-recalibration-repairs/). -
Page 19: Troubleshooting And Customer Support
SDI-12 protocol limits cable length to 60 meters. For multiple sensors connected to the same data line, the maximum is 600 meters of total cable (e.g., ten sensors with 60 meters of cable per sensor). See Apogee webpage for details on how to extend sensor cable length (http://www.apogeeinstruments.com/how-to-make-a-... -
Page 20: 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 21 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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