•
Architecture and building design, illumination and heat balance
studies of buildings.
Advantages of SPN1
•
It matches the WMO ‘Good Quality’ pyranometer classification.
•
It requires no shadow band or solar tracker.
•
There are no moving parts.
•
It does not need to be adjusted or repositioned to track the sun – a
distinct advantage over shade rings or mechanical trackers.
•
It does not need to be oriented towards North. It will work accurately
in any orientation as long as it is mounted horizontally.
•
It does not require knowledge of the Latitude or Longitude, and can
be used at any Latitude or Longitude.
•
It measures sunshine hours as well as Total and Diffuse radiation.
•
The built-in heater allows use in wet or icy conditions.
SunRead PC software
•
The Delta-T Software and manuals CD contains SunRead Windows
PC software that will read the SPN1 output values and status
information via the PC RS232 serial port.
•
SunRead also provides a basic logging capability while the SPN1 is
connected to the PC.
Use with data logger
•
The three outputs of the SPN1 can be logged with a suitable data
logger. The Total and Diffuse radiation millivolt outputs require two
analogue channels.
•
The sunshine state logic output can be taken to a digital channel, or
for some purposes can be connected to an analogue channel in order
to give readings of sunshine duration.
•
The SPN1 is a powered sensor, and requires a power supply of 2mA
at 5V – 15V, from the datalogger, the heater supply, or elsewhere.
•
The SPN1 heater requires a permanent power supply of 12V – 15V at
up to 1.5A.
Use via serial port
•
The SPN1 can be interrogated from any serial port program (eg
Windows Hyper Terminal) - see Appendix B: RS232 commands.
SPN1 User Manual v1.0
Introduction
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