Hi John, No, the sensor is not adjustable. One of the data loggers I use can be recalibrated if you purchase special software. Dickson makes this model. Good to hear from you. Roger John Ross wrote: > Hi Roger, > If a person has a psychomotor, is there a way to change the hygrometer > to agree. That way, we could check and calibrate them, periodically? > Regards, > John M. Ross > Windsor, Nova Scotia, Canada > jrpiano@win.eastlink.ca > ----- Original Message ----- From: "Roger Wheelock" > <roger@dampp-chaser.com> > To: "Pianotech" <pianotech@ptg.org>; "College and University > Technicians" <caut@ptg.org> > Cc: "Becky Baldwin" <becky@dampp-chaser.com> > Sent: Tuesday, January 25, 2005 2:01 PM > Subject: Dampp-Chaser hygrometer specs > > >> Hello list, >> >> I have received a few inquiries regarding the accuracy of >> Dampp-Chaser hygrometers. Customers have purchased the units in >> quantity, set them all up to run side by side, and then have become >> concerned about the results. We contacted the manufacturer in Sweden >> and they verified the following information. >> >> Measuring range: 20-95%RH >> Accuracy within 50-70%RH: +/- 3%RH >> Accuracy outside 50-70%RH: +/- 5%RH >> >> I find that these specs are typical for hygrometers priced similarly >> to ours. Unfortunately, 42% RH could be read anywhere from 37%RH to >> 47%RH when read with these instruments. We believe, however, that >> the instruments do measure changes in relative humidity quite >> accurately. We had hoped technicians would use them to show piano >> owners the variations in the piano's environment (maximum versus >> minimum readings) rather than use them as scientific instruments. I >> use either data loggers or high end ($1500 plus) hygrometers in my >> research. The old saying, you get what you pay for, is really true >> for hygrometers. >> >> Another thing I occasionally do is find myself questioning the >> reading only to realize a little later that it was set on either the >> max. or min. I feel pretty dumb when I figure this out, but thought I >> would pass it along just in case. >> >> Thanks, >> >> Roger >> >> >> >> >> >> _______________________________________________ >> pianotech list info: https://www.moypiano.com/resources/#archives >> > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > > >
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