Jeff,
At the jump from 15W to 30W heat power of the active wire, look
precisely at the power applied to the wire. The power went above 30W
for a few samples (How many seconds ?). So the wire temperature went
above the equilibrium temperature for 30W. After the exact 30W was
applied, the wire cool down to the equilibrium temp.This explains the
strange behavior. Poor experiment handling had been carried for this
calibration with Ar.
Arnaud
Quoting Jeff Berkowitz <[email protected]>:
The calibration wire is just a nichrome wire, or so it says on the slide.
Nothing was said about doing any special processing on this wire.
There's something else weird about the slide. The last bullet at bottom
says "the R/R0, of both wires, just slightly increased (as expected),
increasing the temperatures." But look out to the right at the red line.
See where it takes the second jump from 15W to 30W? This will obviously
increase the temperature of the processed wire. But look at the purple line
above it. The resistance actually *drops* slightly over time while the
power is held at 30W, which contradicts the last bullet item. This is
labeled as a pure Argon test run, remember. No H2.
Jeff
On Tue, Sep 18, 2012 at 1:47 AM, Arnaud Kodeck
<[email protected]>wrote:
**
Dave,
Could it be explained by sintering effect of nano particles ? After
cooling, the inactive wire resistance drop of approximately 0.03 from the
before calibration situation. That's why Celani didn't try the 48W on its
active wire.
Arnaud
------------------------------
*From:* David Roberson [mailto:[email protected]]
*Sent:* mardi 18 septembre 2012 03:16
*To:* [email protected]
*Subject:* [Vo]:Question Concerning Celani's Charts
Unfortunately, the fact that the two different regions
disagreed prevented me from obtaining the calibration I was seeking. Has
anyone discovered an explanation for this discrepancy?
Dave
