Peter's E61 thermokoppelstuk

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E61 nog met originele inbus
Peter van der Weerd heeft m'n espresso-thermometer blogs van de afgelopen weken gevolgd en vanmiddag had hij, na wat puzzelwerk eerder in de week, twee E61 thermokoppelstukken af. Het eerste model steviger en dikker dan het tweede type dat wat fijner is opgezet:
Eerste koppelstuk (boven) met de kleinere nieuwe (onder)

Basis is een stuk van een dunne pijp messing waar het 6mm dikke thermokoppel precies doorheen past. Aan de buitenkant heeft Peter er een schroefdraad ingesneden.

Om te zien hoever de probe in de E61 zetgroep komt, demonteert Peter deze gedeeltelijk. Meteen een goede aanleiding alles goed te smeren en voor mij om te zien hoe dat in elkaar zit:

bron:  http://www.home-barista.com/forums/userpix/269e61__std_2.jpg







Daarna haalt Peter de inbus uit de 'neus' van de E61 en checkt of de door de fabrikant gebruikte schroefdraadlijmweg is. De dunne pijp moet voorzichtig in de bestaande schroefdraad worden gedraaid en als die vast zou komen te zitten door achtergebleven lijm dan wordt het lastig alles nog los te krijgen.

Nu kan Peter's thermokoppelstuk er in:



Zij-aanzicht van de kamer waarin de zet-hendel straks draait: het thermokoppel meet hier de temperatuur. Peter kijkt of de driewegklep hier goed kan draaien:


We hebben de machine aangezet en een poosje de temperaturen gemeten. Eerst met mijn Fluke meter aan de probe en daarna met Peters eigen meter. Het verschil bij gelijke aansluiting is 0.1 graad Celsius.

Komende tijd dus meer metingen bij de koffie!

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