[CAUT] DC bottom covers

[Bob Hull]

Roger,

Why are these humidity levels not closer to the 45%
area?  Is this not what the systems are supposed to 
accomplish?  Have I misunderstood?

Bob Hull

--- Roger Jolly <roger.j at sasktel.net> wrote:

> Hi Stan.
>                 I think the results of the data
> loggers show a lot.    This 
> graph is a sample of two closely matched C3 grands
> in a teaching studio at 
> the University. The pianos sit side by side . Both
> pianos had calibrated 
> data  loggers fixed in identical positions on the
> centre beam.
> Humidity and temperature measurements were made
> every 15mins 24/7.
> One piano with cover, one without.
> The covered piano had the damp chaser unplugged for
> a few days.
> Tuning changes were also made on a weekly basis, but
> I will share that data 
> at a later date.
> You will note that the temperature of the covered
> piano is one to two 
> degrees higher because of reduced circulation, but
> the humidity is on 
> average 10% higher.
> My research has shown that pads should be changed
> every 60days for maximum 
> efficiency.
> 
> Just some teaser information.
> 
> I will get around to collating and publishing more
> extensive data later.
> 
> Point.  These bottom covers work, now we have to
> collectively find better 
> ways to install them.
> 
> Regards Roger
> 
> 
> 


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