Zrób pomiar temperatury bez kawy i z kawą w sitku i porównaj go miedzy sobą.
Tedi, w metodzie WBC, jest wrzucone coś co imituje ciastko kawowe, więc nie jest to tylko radosny przepływ wody przez PF.
Dodatkowo jest zaworek który zapewnia odpowiednie ciśnienie. Eliminujesz dzięki temu zmienne typu, złe mielenie, błędy dystrybucji, etc.
Metoda jak metoda, w każdym razie standardowa i jak ktoś chce zbudować maszynę na MŚ to musi z niej skorzystać. Jak ktoś nie chce, to nie musi
.
A fast-responding, electronic temperature probe, positioned as described above, senses the temperature of the water. The probe
is mounted in a modified portafilter and filter basket, so that the probe may be conveniently inserted in different machines. For
ease of use, measurement consistency, and to ensure that the probe contacts only water, the coffee cake is replaced by a proxy
cake. The flow rate of pressurized water through the portafilter is established by a valve, or another metering device.
3.4.1 Specification
The volume of the filter basket normally filled by the coffee cake shall be filled with a proxy cake having a thermal conductivity of
less than 0.5 Watts/meter Kelvin (W/mK). The volume of the proxy cake should be approximately the same volume as a coffee
cake, but may contain deviations from the actual shape of the coffee cake in order to accommodate the temperature probe,
metering valves, etc. The distance between the group dispersion screen and the top of the proxy cake (headspace) should
approximate the headspace in the presence of an actual coffee cake.
3.4.2 Technical Rationale
A reasonable substitute for the coffee cake enhances practicality.
Tutaj z rysunkami:
https://www.worldcoffeeevents.org/wp-content/uploads/2017/01/2017-WCE-Procedure-for-Measuring-Brewing-Temperature-in-Espresso-Machines-2.pdf