At 11:24 PM 6/20/2011, you wrote:
Abd ul-Rahman Lomax <<mailto:[email protected]>[email protected]> wrote:
The Testo 650 is used for measuring *humidity*,
Jed, for, like, food manufacturing and storage, etc.
Read that HP literature. The device measures up
to 100% humidity, it claims. Wet steam is above
100% humidity. The literature claims that the
device measures: CO2, CO, temperature, and
relative humidity. Other parameters are calculated from these measurements.
<http://www.testo.com/online/embedded/Sites/INT/SharedDocuments/ProductBrochures/0563_6501_en_01.pdf>http://www.testo.com/online/embedded/Sites/INT/SharedDocuments/ProductBrochures/0563_6501_en_01.pdf
It isn't HP; it is testo. The meter also
measures "absolute humidity g/m^3" (mass) and
enthalpy (kcal/kg), which is what we want to
measure. I guess enthalpy is derived from absolute humidity and temperature.
Jed, these devices measure a number of things
directly, and others are calculated. I see no
sign that the device is designed to measure steam
quality. It's not a described application.
Consider the humidity specifications: ±2 %RH (+2 to +98 %RH)
The accuracy is not rated above 98% RH.
The Testo unit described has a bit more range
than the HP device used by Essen and Kullander.
Elsewhere you wrote:
You misunderstood that, I believe. Look at what
the thing actually measures, and look at the
humidity measurement operating range. "85%
(max), no condensation." This thing doesn't work
in the presence of liquid water, as I read it.
There would be no point to making a meter like
this if it did not work in the presence of
liquid water, because there is almost always
some liquid water in process steam. It is never purely dry.
None of the probes seem to be design for
measuring steam quality, and what the devices do
measure directly would not provide you with steam
quality, as far as I can tell. Wet steam would be
at 100% RH, or above, in fact, i.e., a steam
cloud is carrying water above the saturation vapor pressure.
"Humidity," quite simply, is of the air, not the
water droplets that might be carried by the air.
A cloud is generally at 100% humidity, if the water is as fine mist.
I think people here should concede that
Galantini is expert enough to select the right
kind of meter after all, and it is likely he
also knows how to use the meter to measure by mass instead of volume.
I would not assume that from what we have seen.
Remember people making assumptions about
Fleischmann measuring neutrons. He'd never done it before....
Does Galantini have specific experience with this
kind of measurement? Where have we seen that? If
we knew how he obtained the steam quality
statement from what the meter showed, we'd have a
clue. We don't have that kind of report.
That the questions have been asked but have not
found clear answers leaves me with no confidence
in this evidence. There may be other reasons to
think that the demonstrations really showed
serious heat generation. But this steam quality
evidence, unless someone with experience with
that meter can show differently, falls flat. I
don't see that the meter is designed to measure
steam quality at all, and from the
specifications, I'd expect it to be useless for that.
So am I misunderstanding the specifications?
After all, I haven't used a meter like this for this purpose either!
