Thanks Greg. All these/those years, and I didn't realize there was an r in it. If anyone is interested, they are in the Pianotek Catalogue, page C1, Item #10-140. Regards, John M. Ross Windsor, Nova Scotia, Canada jrpiano@win.eastlink.ca ----- Original Message ----- From: "Greg Newell" <gnewell@ameritech.net> To: "Pianotech" <pianotech@ptg.org> Sent: Tuesday, January 25, 2005 3:02 PM Subject: Re: Dampp-Chaser hygrometer specs > John, > I was just pokin a bit for fun. I believe (without looking it up) > that the item is a sling psychrometer. You just left out the "r". It was > an opportunity and I took it! :-) > > Best, > Greg > > > > At 01:42 PM 1/25/2005, you wrote: >>I should have added the word sling. >>It is a wet and dry bulb thermometer that you spin. It comes with a slide >>rule, and tells you the relative humidity, by comparing the dry >>thermometer reading, with the wet one. >> >>John M. Ross >>Windsor, Nova Scotia, Canada >>jrpiano@win.eastlink.ca >>----- Original Message ----- From: "Greg Newell" <gnewell@ameritech.net> >>To: "Pianotech" <pianotech@ptg.org> >>Sent: Tuesday, January 25, 2005 2:28 PM >>Subject: Re: Dampp-Chaser hygrometer specs >> >> >>>Uuuuummmmmmm, what's a psycho - motor? Does this detect psychos? >>> >>> >>> >>> >>>At 01:15 PM 1/25/2005, you 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 >>> >>>Greg Newell >>>Greg's piano Forté >>>mailto:gnewell@ameritech.net >>> >>>_______________________________________________ >>>pianotech list info: https://www.moypiano.com/resources/#archives >> >> >>_______________________________________________ >>pianotech list info: https://www.moypiano.com/resources/#archives > > Greg Newell > Greg's piano Forté > mailto:gnewell@ameritech.net > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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