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Topic: espresso machine brewing temp. from bob lutz fort collins, co (6 msgs / 120 lines)
1) From: RLutz29934
I've been having problems pulling a smooth shot from my Gaggia Espresso 
machine lately. It's always slightly bitter. The water brew temps from the 
showerhead range from 157-167 degrees F. What should the H2O  brew temp be?

2) From: jim gundlach
On Thursday, November 28, 2002, at 08:30 PM, RLutz29934 wrote:
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195-200
Jim Gundlach
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3) From: Dan Bollinger
This is a multi-part message in MIME format.
That's low.  Usually low temps give shots a sour taste and high temps a =
bitter taste.  Looks like you need to adjust your thermo/pressurestat.

4) From: jim gundlach
It has been a while since I've had a Gaggia opened up but I don 't 
think it is adjustable.  As I recall it has two thermostats that 
control the boiler temperature.  One for steam and the other for 
brewing.  When you turn on the brewing switch it closes a circuit that =
runs through the heating coil and the brewing theromostat.  When the 
water gets hot enough the thermostat to break the circuit.  The odds 
are your theromostat is defective and you will have to replace it.  You =
can go to www.Electra-Craft.com and get an e-mail address to request 
the part if you feel up to replacing it yourself.
     Jim Gundlach
On Friday, November 29, 2002, at 05:16 AM, Dan Bollinger wrote:
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temps 
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co
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5) From: Jim Schulman
Hi Bob, You wrote:
-------------------------------------
I've been having problems pulling a smooth shot from my Gaggia Espresso 
machine lately. It's always slightly bitter. The water brew temps from the 
showerhead range from 157-167 degrees F. What should the H2O  brew temp be?
---------------------------------------
Ideally, it's 90C - 95C or 194F to 203F.7
However, I'm sceptical about your reading being correct. If you used a ther=
mocouple threaded into the portafilter, you're correct. If you used a syr=
ofoam cup held against the shower screen with a digital thermometer probe=
 stuck through the side, you should add about 5 to 10F to your measuremen=
t. If you allowed the water to drop, uninsulated, away from the head prio=
r to measuring, it is impossible to tell what your actual brewing tempera=
ture is, since the droplets cool off almost instantly.
Jim
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6) From: Irene and Lubos Palounek
Bob,
check not only the temperature, but also the pressure. The pressure for
brewing should be between 9 and 10 atmospheres.
Different people have different recommendations concerning the proper
temperature for espresso brewing.  It seems that stable, consistent
temperature is even more important than the temperature itself!
Simonelli states that 185F (85C)is the "proper" brewing temperature.
203.5 degrees F (95.3C) is the temperature recommended by David Schomer.
"Espresso machines should generate an ideal water temperature of 187 degrees
to 196 degree Fahrenheit (86C to 91.1)" perhttp://www.americanconnoisseur.com/libations/espressoarticle.html"The water temperature should be stable and somewhere between 92-96C
(197.6C to 204.8F)" per www.coffeeresearch.org
How did you measure the temperature, Bob? Measuring the brewing temperature
is NOT easy.
Fromhttp://www.coffeeresearch.org/espresso/tempstabilize.htm:
"The best way to check (temperature) is to place a k-type bead probe within
the porta-filter up through the basket and measure water temperature
throughout the day."
Read also "Measuring Your Brewing Water Temperature" athttp://www.lucidcafe.com/cafeforum/schomertable13.htmlHope this helps,
Lubos
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