Re: [APML] A strange ST-4 behavior

["Matthias Felsch" <mbox3@mfelsch.de>]

I had a similiar behaviour of the ST4 once when the battery driving the
ST4 AND a Kendrick dew remover was rather low.
The (regulated) dew remover is alternately switched off and on by the
control box to keep a certain temperature.
On the other hand the ST4 is very critical with the voltage:
it needs at least 12 volts, 11.7 is not enough.
Now each time the dew remover was switched on, the
voltage dropped slightly below 12 volts, so the ST4 stopped
working, showing 0 0 0 . Some ten seconds later,
the dew remover was turned off, the voltage jumped to above
12 volts and the ST4 continued working.
And so on....

Since that night my ST4 has a battery of it's own.

Don't know if this is helpful

Matthias Felsch



----Ursprüngliche Nachricht----
Von: "Massimo" <mascosta@tiscali.it>
An: <astro-photo@seds.org>
Gesendet: Dienstag, 6. Januar 2004 18:36
Betreff: [APML] A strange ST-4 behavior

> Sirs,
> any suggestion for this ST-4 behavior? After turned on and focused on a star, the
> display readout was 0 0 0 alternated with normal values. Obviously, calibrating and
> tracking didn't work... Once again at home, I checked the system and all seems to be
> OK. I also tried to modify the parameters (scintillation, ecc.), but that night my ST-4
> didn't work. The night was, also, very very quiet...
>
> Thanks you all.
>
> Massimo Costa
>
>
>
>
>
>
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