Hi David. Do you have an address, phone #, or URL? Thanks Terry Farrell Piano Tuning & Service Tampa, Florida mfarrel2@tampabay.rr.com ----- Original Message ----- From: "David M. Porritt" <dporritt@swbell.net> To: <pianotech@ptg.org> Sent: Wednesday, March 08, 2000 7:23 PM Subject: Re: Humidistat Performance > Terry: > > Amprob sells a good one for about $105.00 (the THWD-1. It really is quite > accurate. > > dave > > *********** REPLY SEPARATOR *********** > > On 3/8/00 at 2:39 PM Farrell wrote: > > >John: > >My understanding is that for the humidistat to function as designed, it > >would switch the dehumidifier on @ 46% RH and switch it off when RH is 38% > >(or so). If a humidifier was installed, it would switch on @ 38% RH and > >switch off @ 46% RH. Obviously, if a humidifier is not installed, all > would > >be off for the period it takes for RH to increase from 38% to 46% (or > there > >abouts). But for all my tests to consistently be hovering around 60% - I > >just don't understand. > > > >My reasoning for this being important to me is this: In Florida, RH in a > >home drops to a low of approximately 35% during dry winter months (and > >therefore, I do not see the need for humidification). If the dehumidifier > >kept the soundboard environment to a maximum RH of around 42% (as > >advertised), my overall RH range would be about 35% to 45%. Considering my > >observations of my humidistat's performance, the RH range for the > soundboard > >is about 35% to 62% - not nearly as good as it presumably could be. > > > >Don: > >I have three hygrometers. The one sold by DC, another similar one, and one > >that may be a bit better. All three are within 1 or 2 percent of each > other. > >I'm thinking of forking over the dough for a real good one. Bob Mair @ DC > >recommended a couple of units that are more accurate. They run in the $200 > >to $350 range, depending on features. > > > >Terry Farrell > >Piano Tuning & Service > >Tampa, Florida > >mfarrel2@tampabay.rr.com > > > >----- Original Message ----- > >From: "John M. Formsma" <jformsma@dixie-net.com> > >To: <pianotech@ptg.org> > >Sent: Wednesday, March 08, 2000 10:44 AM > >Subject: RE: Humidistat Performance > > > > > >> Terry, > >> > >> Don't they mention this in the literature? I think I read that this is > by > >> design. Something about creating an enviroment that is not suddenly > >changing > >> all the time. > >> > >> John Formsma > >> Blue Mountain, MS > >> > >> > >> -----Original Message----- > >> From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf > >> Of Farrell > >> Sent: Wednesday, March 08, 2000 9:17 AM > >> To: pianotech@ptg.org > >> Subject: Humidistat Performance > >> > >> > >> Hello List: > >> > >> I have been monitoring performance of DC humidistats in my shop. I am > >> finding that the relative humidity (RH) on-off points for the humidisats > >> (dehumidifier outlet) are in the 55% to 65% range, rather than somewhere > >> centered around 42%. I have done my field testing using several > different > >> humidistats. Has anyone else monitored the performance of humidistats? I > >am > >> having trouble understanding why my observations would vary so much from > >> what I understand to be advertised. > >> > >> Terry Farrell > >> Piano Tuning & Service > >> Tampa, Florida > >> mfarrel2@tampabay.rr.com > >> > >> > > > > > David M. Porritt > dporritt@swbell.net > Meadows School of the Arts > Southern Methodist University > Dallas, TX 75275 > >
This PTG archive page provided courtesy of Moy Piano Service, LLC