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Summary of Contents for Apogee SQ-627
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Page 1: Owner's Manual
OWNER’S MANUAL EXTENDED RANGE PFD SENSOR Model SQ-627 (including SS models) APOGEE INSTRUMENTS, INC. | 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM Copyright © 2020 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 ................................. 5 Deployment and Installation ..........................8 Cable Connectors ..............................8 Operation and Measurement ..........................10 Maintenance and Recalibration .......................... 14 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
A cable to connect the sensor to a measurement device is also included. SQ-600 series Extended Range PFD Sensors are designed for continuous photon flux density measurements in indoor environments under LEDs. The SQ-627 sensors output a digital signal using SDI-12 communication protocol. -
Page 5: Sensor Models
SENSOR MODELS This manual covers the digital model SQ-627 Extended Range PFD SDI-12 Sensor (in bold below). Additional models are covered in their respective manuals. Model Signal SQ-620 Self-powered SQ-622 0-2.5 V SQ-624 4-20 mA SQ-625 0-5 V SQ-626 SQ-627... -
Page 6: Specifications
4 years against defects in materials and workmanship Calibration Traceability Apogee Instruments SQ-600 series PFD sensors are calibrated through side-by-side comparison to the mean of four transfer standard PFD sensors under a reference lamp. The transfer standard PFD sensors are recalibrated with a... - Page 7 Directional, or cosine, response is defined as the measurement error at a specific angle of radiation incidence. Error for Apogee SQ-600 series Extended Range PFD Sensor is approximately ± 2 % and ± 5 % at solar zenith angles of 45° and 75°, respectively.
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Page 8: 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 AM- 110 mounting bracket is recommended. -
Page 9: Cable Connectors
CABLE CONNECTORS Apogee started offering 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). -
Page 10: Operation And Measurement
SDI-12 Interface The following is a brief explanation of the serial digital interface SDI-12 protocol instructions used in Apogee SQ- 627 Extended Range PFD sensors. For questions on the implementation of this protocol, please refer to the official version of the SDI-12 protocol: http://www.sdi-12.org/specification.php... - Page 11 Supported Commands for Apogee Instruments SQ-627 Extended Range PFD 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 12 0M3! 00011<cr><If> 0<cr><If> 0D0! 0+2000.0<cr><If> 0M4! a0011<cr><If> 0<cr><lf> 0D0! 0+90.2<cr><lf> where 2000.0 is µmol m 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 13 Command Response Description aAb! b<cr><lf> Change the address of the sensor where a is the current (old) sensor address (“0-9”, “A-Z”), A is an upper-case ASCII character denoting the instruction for changing the address, b is the new sensor address to be programmed (“0-9”, “A-Z”), and ! is the standard character to execute the command.
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Page 14: 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 15: 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 16: 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 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.
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