<br><font size=2 face="sans-serif">Hi Jeannie!</font>
<br>
<br><font size=2 face="sans-serif">Good to hear from you!</font>
<br>
<br><font size=2 face="sans-serif">That's an interesting observation on
the cheapie vs. fancy-schmancy. Maybe that "relative-relative"
reading is all that I need. I still don't understand why that one
particular room feels so muggy, yet doesn't register high on the hygrometer.
Maybe I have a lemon?</font>
<br>
<br><font size=2 face="sans-serif">Best,</font>
<br>
<br><font size=2 face="sans-serif">Paul</font>
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<td width=40%><font size=1 face="sans-serif"><b>"Jeannie Grassi"
<jcgrassi@earthlink.net></b> </font>
<br><font size=1 face="sans-serif">Sent by: caut-bounces@ptg.org</font>
<p><font size=1 face="sans-serif">11/15/2007 09:23 PM</font>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
College and University Technicians <caut@ptg.org></font></div></table>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">"'Ed Sutton'" <ed440@mindspring.com>,
"'College and University Technicians'" <caut@ptg.org></font>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
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<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [CAUT] Hygrometers</font></table>
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<br><font size=2 color=#000080 face="Arial">Hi Ed, Paul, et al,</font>
<br><font size=2 color=#000080 face="Arial">I recently bought one of the
“Professional” hygrometers from Pianotek because I had heard the same
comments from several other people. Well, for the past two months
I’ve been using it side by side along with a Dampp-chaser hygrometer a/o
ones that my clients happen to be using. I’d like to say that the
small difference in RH that it reads hardly amounts to anything. AND……it
takes quite a while (like five minutes) to settle down and give an accurate
reading from what it registered in my case, in my car, traveling from the
last appointment. </font>
<br><font size=2 color=#000080 face="Arial"> </font>
<br><font size=2 color=#000080 face="Arial">At first I would smugly take
a reading off of it immediately and was surprised at what a different result
it gave from what was in the piano. I congratulated myself on upgrading
my tool and being a true “professional. However, one time I just
let it sit there while I was tuning and noticed how much it changed until
it ended up with almost the same as the one in the piano. I observe
this every day now. And I’m asking myself why I spent all of that
extra money. One client proudly showed me his thermo-hygrometer (with
memory) that he bought at Walmart for $6. It read the same as my
fancy-schmancy “professional” one. </font>
<br><font size=2 color=#000080 face="Arial"> </font>
<br><font size=2 color=#000080 face="Arial">Comments? ;>)</font>
<br><font size=2 color=#000080 face="Arial">jeannie</font>
<br><font size=2 color=#000080 face="Arial"> </font>
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<br><font size=2 face="Tahoma"><b>From:</b> caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]
<b>On Behalf Of </b>Ed Sutton<b><br>
Sent:</b> Thursday, November 15, 2007 3:05 PM<b><br>
To:</b> College and University Technicians<b><br>
Subject:</b> Re: [CAUT] Hygrometers</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=2 face="Arial">How about the "Professional" meter
that Pianotek sells?</font>
<br><font size=2 face="Arial">I like it because it reads quickly and reads
lower RH than the Radio Shack types.</font>
<br><font size=2 face="Arial">I haven't compared it to a sling psychrometer.
The sling psychrometers I have found were rather expensive.</font>
<br><font size=2 face="Arial">Ed Sutton</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=2 face="Arial">----- Original Message ----- </font>
<br><font size=2 face="Arial"><b>From:</b> </font><a href=mailto:john@musselwhite.com><font size=2 color=blue face="Arial"><u>John
Musselwhite</u></font></a><font size=2 face="Arial"> </font>
<br><font size=2 face="Arial"><b>To:</b> </font><a href=mailto:caut@ptg.org><font size=2 color=blue face="Arial"><u>College
and University Technicians</u></font></a><font size=2 face="Arial"> </font>
<br><font size=2 face="Arial"><b>Sent:</b> Thursday, November 15, 2007
4:41 PM</font>
<br><font size=2 face="Arial"><b>Subject:</b> Re: [CAUT] Hygrometers</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">At 12:42 PM 11/15/07, Paul wrote:<br>
<br>
</font>
<br><font size=2 face="Times New Roman">Hi List,</font><font size=3 face="Times New Roman">
<br>
</font><font size=2 face="Times New Roman"><br>
I have a couple of those cheap max-min thermo-hygro readers from
Pianotek. I'm not sure if they're very accurate. </font>
<br><font size=3 face="Times New Roman"><br>
They're more accurate than the Radio Shack ones, but I don't think by much.<br>
<br>
</font>
<br><font size=2 face="Times New Roman">If you all remember, last fall/winter
I sent in some photos of one of our recital rooms that Richard West took
before I got here with the fog and water dripping all over everything.
It hasn't been that bad since I've been here, but the last couple
of times I've gone in there this past week, it feels really muggy, but
the hygrometer only registers 40-45% (which would be ideal). Any
suggestions on who makes a real accurate reader?</font><font size=3 face="Times New Roman">
</font>
<br><font size=3 face="Times New Roman"><br>
We have the opposite problem here where Rh can be down into the single
digits in mid-winter. None of the "standard" humidity gauges
go down that far. I use a Cooper Digital Psychrometer much like the one
down the page at </font><a href=http://www.techinstrument.com/acatalog/Hygrometers__RH___humidity_.html><font size=3 color=blue face="Times New Roman"><u>http://www.techinstrument.com/acatalog/Hygrometers__RH___humidity_.html</u></font></a><font size=3 face="Times New Roman">
(SAMJR995). It's a digital version of a "sling psychrometer",
the wet/dry bulb unit we use to make truly accurate RH readings. While
it's supposedly accurate +-5% it still reads down to zero Rh which in worst
case might actually be 5%. I've read as low as 3% in mid-winter here in
some churches. In those pianos with DC's installed, sticking it under the
rim for a minute and pressing the "hold" button shows it's in
the 40-43% range at the soundboard even with extremely low humidities outside
the instrument.<br>
<br>
I also have a USB recording hygrometer that will track the RH and temp
over a long period of time. It's at </font><a href="http://www.measurementcomputing.com/cbicatalog/USB-502.asp?dept_id=414&pf_id=1759"><font size=3 color=blue face="Times New Roman"><u>http://www.measurementcomputing.com/cbicatalog/USB-502.asp?dept_id=414&pf_id=1759</u></font></a><font size=3 face="Times New Roman">
. It reads very much like the "standard" units and differs from
the Psychrometer's readings. I trust the Cooper more for truly accurate
readings.<br>
<br>
John<br>
<br>
</font>
<div align=center>
<br><font size=3 face="Times New Roman">-------------------------------<br>
John Musselwhite, RPT - Registered Piano Technician<br>
Musselwhite Piano Services - Calgary, Alberta Canada<br>
Office/cel (403) 246-7717 Fax (403) 255-5268<br>
Outside of Calgary call Toll Free: 1-866-95-PIANO (1-866-957-4266)<br>
"Three Generations of Experience"</font>
<br></div>