Table of Contents
Related Manuals for Apogee Instruments SQ-600 Series
Summary of Contents for Apogee Instruments SQ-600 Series
-
Page 1: Owner's Manual
OWNER’S MANUAL EPAR SENSOR Models SQ-614 Rev: 4-Jan-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 ................................... 7 Deployment and Installation ..............................10 Cable Connectors ................................... 11 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
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.
-
Page 6: Sensor Models
SQ-617 SDI-12 SQ-618 Modbus A sensor’s model number and serial number are located on the bottom of the sensor. If the manufacturing date of a specific sensor is required, please contact Apogee Instruments with the serial number of the sensor. -
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. Measured...
- 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.
-
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, made of corrosion-resistant marine-grade stainless- steel, and designed for extended use in harsh Cable connectors are attached directly to the head. -
Page 12: Operation And Measurement
OPERATION AND MEASUREMENT Connect the sensor to a measurement device (meter, datalogger, controller) capable of measuring and displaying a 4-20 mA signal. 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. DO NOT connect the sensor to a power source greater than 24 V DC. - Page 13 Sensor Calibration Apogee SQ-614 ePAR Sensors have standard calibration factors of exactly: 250 µmol m per mA Multiply the calibration factor by the measured mA signal to convert sensor output to photon flux density in units of µmol m Calibration Factor (250 µmol m per mA) * Sensor Output Signal (mA) = Photon Flux Density (µmol m (13.6 –...
- Page 14 Spectral Error Quantum sensors are the most common instrument for measuring PPFD, because they are about an order of magnitude lower cost the spectroradiometers, but spectral errors must be considered. The spectral errors in the table below can be used as correction factors for individual radiation sources. Spectral Errors for PPFD Measurements with Apogee SQ-610 Series ePAR Sensors SQ-610 Series Radiation Source (Error Calculated Relative to Sun, Clear Sky)
-
Page 15: Maintenance And Recalibration
3. Salt deposit accumulation from evaporation of sea spray or sprinkler irrigation water. Apogee Instruments upward-looking sensors have a domed diffuser and housing for improved self-cleaning from rainfall, but active cleaning may be necessary. Dust or organic deposits are best removed using water, or window cleaner, and a soft cloth or cotton swab. -
Page 16: Troubleshooting And Customer Support
TROUBLESHOOTING AND CUSTOMER SUPPORT Independent Verification of Functionality Apogee SQ-614 ePAR Sensors provide a 4-20 mA output that is proportional to extended photosynthetically active radiation for the 400-750 nm wavelength range. A quick and easy check of sensor functionality can be determined using a DC power supply and an ammeter. -
Page 17: 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 18 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.
Need help?
Do you have a question about the SQ-600 Series and is the answer not in the manual?
Questions and answers