On Wed, 11 Apr 2007 10:27:37 +0100, Roger Brugge
wrote:

On that date it sent a message saying that it could not retrieve a certain record.
After that it ceased downloading records.

It is a Davis machine and is connected to a wind vane, a temperature and a pressure
sensor and a humidity sensor. I have had it since the middle 1990's and it has
never given me trouble before.

I then asked around and was told that the Davis is a very sturdy programme so it
must be the fault of the pc. I had that overhauled and although it worked for some
time, after a couple of weeks I got the same error message and again it stopped
downloading data.

I have just sent the data logger to Davis to have it looked at, even though it is new.


I'm afraid that this is rather a vague fault report - without more
details it's difficult to advise.

For example, was the Weatherlink software that could not 'retrieve a
certain record' trying to retrieve it from the data logger or was it
trying to retrieve some data from its archive database that should
have been already downloaded? Did the user try creating a new station
within WL and then downloading into that? (Sometimes a hard disk or
other PC glitch can corrupt one of the database files and block
subsequent downloading). Were the date and time settings and also the
serial port settings carefully checked?

Was the user able to try connecting the logger to a different PC to
ascertain whether it was a logger or PC problem?

The Weatherlink data logger is generally pretty robust and is only
rarely the cause of download problems so I'd tend to look elsewhere
first for the cause, especially if the logger is indeed a fairly new
one. It sounds a bit suspicious to me that the problem temporarily
went away after the PC was 'overhauled' (whatever that might mean
exactly) and so I'd tend to suspect the PC. But without more details
and more tests it's impossible to be sure.

John Dann
www.weatherstations.co.uk