tuning with Dampp-Chaser

[John Ross]

I think when they say +/- 5% that just means the accuracy of the reading. A
drop of 7% is still a drop of 7%, everything being relative.
Regards
John M. Ross
Windsor, Nova Scotia.
jrpiano@win.eastlink.ca
----- Original Message -----
From: "Farrell" <mfarrel2@tampabay.rr.com>
To: <pianotech@ptg.org>
Sent: Sunday, March 24, 2002 4:58 PM
Subject: Re: tuning with Dampp-Chaser


> Just one thought Charles. If you are using one of the little $30
hygrometers out there, I would not attach too much significance to an
indicated 7% drop in RH. That is likely pretty close to the accuracy of
those things at best. I think they are are really only meant to give you a
reading on whether it is super-humid, really dry, or somewhere in between. I
wouldn't count on anything less than maybe 10% (or more) reading change as
being meaningful.
>
> Terry Farrell
>
> ----- Original Message -----
> From: "Charles Neuman" <piano@charlesneuman.net>
> To: <pianotech@ptg.org>
> Sent: Sunday, March 24, 2002 3:16 PM
> Subject: Re: tuning with Dampp-Chaser
>
>
> > Now I'm pretty convinced that one of the main things that affects the
> > performance of the D-C is drafts, as has already been pointed out to me.
> >
> > I reported before that the D-C seemed to have trouble keeping the
humidity
> > up when the room was below 30% humidity.  Today it was around 35% and I
> > had the temperature in the room at a stable 68 deg F. The humidity in
the
> > piano was around 42%. Perfect. Then, since it was a nice day out, I
opened
> > some doors. I still had a heater going in the piano room, so the
> > temperature didn't change. However, the open doors caused a lot of air
to
> > move around. Then the humidity in the piano dropped to around 35%. So I
> > think the air moving around was the cause.
> >
> > And drafts could explain why it was having a hard time when the humidity
> > was really low. When I was getting those low humidity levels in the
room,
> > it was because the heat was on a lot because it was cold out. While I
> > didn't feel any big drafts, I noticed that my feet were really cold.
That
> > means there was cold air seeping into the room, hence air moving around.
I
> > think that was causing the problems.
> >
> > I'll definitely try a back cover. Also, I might consider filling the
crack
> > at the top of the knee board with that gray foam rubber stuff that
> > hardware stores sell to place around air conditioner window units. I'd
> > also really like to have a removable top cover under the lid so that I
can
> > open the lid while I play but not affect the humidity when I do so.
> >
> > Charles
> >
> >
>