<br><font size=2 face="sans-serif">Are the sling style the ones one would
whirl around your head on a string? Richard had one of those, but
accidently broke it in the shop years ago and hasmet had to be called in
for the mercury clean up. I wouldn't want those. The Cooper
looks interesting...</font>
<br>
<br><font size=2 face="sans-serif">We do have extrememely dry conditions
in the cold Nebraska winters, and very high humidity in summers; but the
facilities across campus opens a steam duct system that goes to every building
on campus, I don't think there is much adjusting that can be made. It's
either on or off. Very old and antiquated. We're working on
getting a new building someday (pipe dream, of course ;>)</font>
<br>
<br><font size=2 face="sans-serif">Thanks</font>
<br>
<br><font size=2 face="sans-serif">Paul</font>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>"Ed Sutton"
<ed440@mindspring.com></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 05:23 PM</font>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
Ed Sutton <ed440@mindspring.com>; Please respond to<br>
College and University Technicians <caut@ptg.org></font></div></table>
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<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">"College and University Technicians"
<caut@ptg.org></font>
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<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
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<td>
<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>
<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> </font>
<br><font size=3>----- Original Message ----- </font>
<br><font size=3><b>From:</b> </font><a href=mailto:john@musselwhite.com><font size=3 color=blue><u>John
Musselwhite</u></font></a><font size=3> </font>
<br><font size=3><b>To:</b> </font><a href=mailto:caut@ptg.org><font size=3 color=blue><u>College
and University Technicians</u></font></a><font size=3> </font>
<br><font size=3><b>Sent:</b> Thursday, November 15, 2007 4:41 PM</font>
<br><font size=3><b>Subject:</b> Re: [CAUT] Hygrometers</font>
<br>
<br><font size=3>At 12:42 PM 11/15/07, Paul wrote:<br>
</font>
<br><font size=2>Hi List,</font><font size=3> <br>
</font><font size=2><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><br>
They're more accurate than the Radio Shack ones, but I don't think by much.<br>
</font>
<br><font size=2>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> </font>
<br><font size=3><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><u>http://www.techinstrument.com/acatalog/Hygrometers__RH___humidity_.html</u></font></a><font size=3>
(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><u>http://www.measurementcomputing.com/cbicatalog/USB-502.asp?dept_id=414&pf_id=1759</u></font></a><font size=3>
. 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>
</font>
<div align=center>
<p><font size=3>-------------------------------<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>
<p></div>