SPN1 cosine responseSPN1 Cosine response00.10.20.30.40.50.60.70.80.911.11.20 10 20 30 40 50 60 70 80 90Zenith angle (degrees)Ideal cosineAbsolute outputRelative error2% limitsThis graph shows the typical cosine response of the SunshinePyranometer compared to the ideal cosine curve. The upper curve showsthe relative accuracy24 z Technical reference SPN1 User Manual v1.0

Introduction

Construction

Accessories

System overview

Power considerations

Use with a data logger

ground connections

Delta-T data logger connections

Use with a PC or serial device

Accuracy and errors

Technical reference

SPN1 spectral response

SPN1 cosine response

Routine maintenance

Calibration procedure and traceability

Warranty and service

Service and spares

Problems

Appendix A: Design and test summary

Calculation of outputs

Test results

Appendix B: RS232 commands

test mode

Glossary

Delta-T SPN1 User Manual

SPN1

About DNI: What is it and why should I care

How do I calculate DNI if my SPN1 is horizontal

GPS time and position

SPN1 electrical connections

RS232 Commands for obtaining DNI

SPN1 DNI Command usage

Conversion of GPS sentences for use with SPN1