My only comment is that if you have extremes in humidity as indicated by the fluctuation apparent in a piano's performance, it is good to have an accurate instrument to back up your findings. Chris Gregg At 06:42 AM 1/9/2004, you wrote: >I agree - a low cost 3% accuracy instrument should be fine for tracking >changes in humidity in a customer's home over time. For use in a >customer's home, I would argue that it is the repeatability that is more >important than the actual accuracy of the instrument. Sensor linearity is >also important but no matter what the sensor make-up, all sensors start to >become non-linear at the extreme ends of the scale (as has already been >discussed). > >Practically speaking, you want to pay for an instrument with reasonable >accuracy (3-5% full-scale) and even better repeatability (0.5 to 1% >full-scale). An instrument at this level can be purchased in the $50 to >$100 range. I don't see a need to purchase anything more expensive for use >in tracking humidity levels in a customer's home. > >Corte Swearingen >Chicago > > > > > Richard > Brekne > <Richard.Brekne@gr To: Pianotech > <pianotech@ptg.org> > ieg.uib.no> cc: > > Sent by: Subject: Re: Zero > percent humidity > pianotech-bounces@ > > ptg.org > > > > > > 01/09/2004 > 05:15 > AM > > Please respond > to > Pianotech > > > > > > > > > >Hi humidity freaks :) > >Just curious... shop use for building is one thing, but in advising >customers at home, DC use, and other less critical applications... I >generally just have one of those 5 dollar digi-hygrometers in my bag. >Supposed to be good for +/- 3 % RH in the range of 23% to 90 %. I >generally point out that anything under 30 % is just plain too dry, and >anything over 70% is just plain to wet. > >Is there any reason for needing more accuracy in these kinds of >instances that I should know about ? > >Cheers >RicB > >Farrell wrote: > > > > What kind of an instrument are you using to measure RH @ less than 20%? > > > > Terry Farrell > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives > > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives http://www.tuneit.ca
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