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OWNER'S MANUAL

PYRANOMETER
Models SP-522
Rev: 12-Feb-2021
APOGEE INSTRUMENTS, INC. | 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA
TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM
Copyright © 2021 Apogee Instruments, Inc.

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Summarization of Contents

Certificate of Compliance
EU Declaration of Conformity
This declaration of conformity is issued under the sole responsibility of the manufacturer.
Standards Referenced
Lists standards like EN 61326-1 and EN 50581 for compliance.
Specifications
Calibration Traceability
Details calibration procedures and traceability to standards like NREL and WRR.
Cable Connectors
Pins and Wiring Colors
Details pin assignments and wire colors for sensor connection.
Connector Alignment and Disconnection
Guidance on proper connector alignment and disconnection procedures.
Proper Connector Tightening
Instructions and warnings for securely tightening the sensor connector.
Operation and Measurement
Wiring and Modbus Interface
Covers wiring, Modbus RTU protocol, and related documentation.
Sensor Calibration
Details how sensor calibration coefficients are programmed.
Modbus Overview and Addressing
Explains Modbus registers, values, and sensor addressing.
Register Index and Packet Structure
Register Categories
Details float, integer, read/write, and write-only registers.
Modbus Packet Structure
Explains packet framing and provides example packets.
Maintenance and Recalibration
Cleaning Procedures
Guidance on cleaning the sensor to prevent low readings.
Recalibration Recommendations
Information on sensor recalibration frequency and using Clear Sky Calculator.
Troubleshooting and Customer Support
Independent Verification
Methods to check sensor functionality using an ammeter or datalogger.
Cable Length Considerations
Recommendations for RS-232 and RS-485 cable lengths.
Troubleshooting Tips
Tips for ensuring proper wiring, power supply, and configuration.
Return and Warranty Policy
Return Policy
Details on returning products within 30 days of purchase.
Warranty Policy Coverage
Outlines what is covered and not covered under the product warranty.
Products Beyond Warranty
Information on contacting Apogee for products out of warranty.

Table of Contents