Problems
Problem reports
Always try to isolate the source of the difficulty. It will help considerably if
you can mention as many relevant details as possible. In particular:
•
A description of the fault, its symptoms, or error messages
•
If logging, what logger you are using, details of the logging program
and any other devices connected to it
•
Details of any PC you are using
•
Software version numbers and hardware serial numbers (see below)
Locating version and serial numbers
The SPN1 serial number label is on the lower part of the case. The
internal software (firmware) version number is displayed in the About box
using SunRead.
Troubleshooting
SPN1 not responding
The red LED inside the SPN1 bezel will flash when the SPN1 is taking
readings.
If using the RS232 cable check that you are using the correct cable, and
that it is plugged into the same serial port on your PC that you have
selected in the SunRead software.
If logging, check the logger cable and compare with your logger wiring
connection diagram. Make sure that the DL-Power wire is connected to
>5V to enable the analogue outputs.
Check also your logger. For Delta-T loggers check the sensor
configuration, power warm-up relay wiring connection and warm-up relay
program configuration.
Unexpected output readings
Pay particular attention to the power supply and grounding arrangements.
Try operating without the heater connected and see if that affects the
readings.
Try logging the SPN1 direct to a PC using the SunRead software.
Make sure the desiccant is fresh and the dome is clean.
SPN1 User Manual v1.0
Warranty and service
z
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