Quickmill Silvano PID Shows Temperature Drop While Pulling Shot
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I'm brand new to this whole world, so I hope this isn't a stupid question.
Just bought a Vario and Silvano. Having fun experimenting, but I find that when I pull a shot with the Silvano, the PID starts at around 203 and drops throughout the pull.
Is this normal?
Thanks, Gary
Just bought a Vario and Silvano. Having fun experimenting, but I find that when I pull a shot with the Silvano, the PID starts at around 203 and drops throughout the pull.
Is this normal?
Thanks, Gary
- HB
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I haven't used the Silvano, but it's probably normal. I elaborated in Crossland CC1 excessive brew temperature drop during brewing:
Any owners wish to confirm?HB wrote:Generally speaking, the boiler's PID readout is meaningless once the pump switches on because the probe may be intentionally mounted near the water inlet on the boiler to improve response time. However, the brewhead temperature should rise rapidly to the target brew temperature and then shouldn't drop much at all. Since you have a thermocouple/thermometer, snake the thermocouple wire up the portafilter spout and stuff the portafilter bowl with aluminum foil so the bead is pressed firmly against the dispersion screen. It's an imperfect measurement technique, but should be accurate within a few degrees to a Scace thermofilter reading.
Most espresso machines I've tested with a similar technique idled between 165°F and 185°F. The temperature should shoot up to the target brew temperature within 5-10 seconds, then fall off a few degrees. If you measure a 50°F drop at the brewhead in two ounces, then the boiler temperature is way off.
Dan Kehn
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Not an owner (yet), but here's a link to a Vimeo video where Chris shows great temp stability during a "shot" with a Scace and a Fluke:
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Outstanding! Exactly what I was looking for - thanks!
- HB
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