HomeRoast Digest


Topic: Silvia with PID Kit (3 msgs / 61 lines)
1) From: Lauren Good
I recently picked up a Silvia from another member on this list  
already fitted with a PID from PIDkits.  I'm curious if there any  
others on the list with the same set-up, what temperature you leave  
the PID set up at.
The default is 228 as the boiler temperature, and I'm wondering what  
others experience has been.
Lauren

2) From: miKe mcKoffee
Yes, 28f about the usual offset boiler to shot on Silvia. BTW most PIDs you
can program offset to compensate, ie to display 200f @ 228f boiler.
Kona Konnaisseur miKe mcKoffee
URL to Rosto mods, FrankenFormer, some recipes etc:http://mdmint.home.comcast.net/coffee/Rosto_mod.htmUltimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
<Snip>

3) From: Mike Koenig
Lauren,
The correct boiler temperature is somewhat variable, and dependent on
the placement of the thermocouple on the boiler, the accuracy of the
thermocouple (mine was off by ~ 6 C when I calibrated it in boiling
water).  I ended up with a boiler temp of 103 C (217 F) delivering 92
C (198 F) as measured by sticking a thermocouple bead probe up the
portafilter spout.  (not as elegant as a thermofilter, but it works
for me).
Since your PID installation was a kit, I would imagine there is some
consistency in the offset from kit to kit,  but I still think there is
enough variability among thermocouples to warrant checking the
temperature.  Beg, borrow, or steal a temperature measuring device
that uses a bead type probe, since they have a fairly fast reponse.
The cheap "meat thermometer" types respond too slowly to work for
this.
Alternatively, you can risk a significant caffeine buzz by bracketing
temperatures, and adjusting by taste,  as long as all the other
variables are consistent.
--mike
On 12/20/06, Lauren Good  wrote:
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