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Date: 25 Jun 2007 11:19:24
From: Neal Reid
Subject: Low Water indicator
My <who knows what it is > machine:
1) is a pourover HX with standard autoFill - a probe in the
boiler and a wire in the bottom of the filltank
2) has a little red light that comes on when the tank level gets
done to that wire - also shutting off the pump.

There's no sight glass or any mechanism to check the tank level
(other than pushing the machine around on the counter and
listening for the autoFill to cut in as water sloshes).

It occurs to me that I should be able to tap another screw higher
into the tank and figure some way to light a light saying, "Water
Low" but not cutting the pump off. The schematic printed on the
inside of the case is corroded to almost nothing - it's unusable.
All the parts I've replaced have either been Brasilia or Bezerra;
i.e. it's a hodge-podge of standard parts/ Like as not a standard
brain box et. al.

I'll take some pics if that would help - but call this a
feasibility study. Has anyone solved the problem of finding out
when an autoFill pourover is about to run out of water - without
the pain of quitting in mid-pull?

--
M for N in address to mail reply




 
Date: 26 Jun 2007 15:18:59
From: Barry Jarrett
Subject: Re: Low Water indicator
On Mon, 25 Jun 2007 11:19:24 -0400, Neal Reid <NealReid@Nagma.ca >
wrote:

>It occurs to me that I should be able to tap another screw higher
>into the tank and figure some way to light a light saying, "Water
>Low" but not cutting the pump off.

how about removing the pump from the alarm circuit, so you'll still
get the light, but the pump won't shut off in the middle of a pull.



  
Date: 26 Jun 2007 19:15:35
From: Neal Reid
Subject: Re: Low Water indicator
In article <sjb283dav87ngicb789eeo8ia8vo17nrn8@4ax.com >,
Barry Jarrett <barry@rileys-coffee.com > wrote:

> On Mon, 25 Jun 2007 11:19:24 -0400, Neal Reid <NealReid@Nagma.ca>
> wrote:
>
> >It occurs to me that I should be able to tap another screw higher
> >into the tank and figure some way to light a light saying, "Water
> >Low" but not cutting the pump off.
>
> how about removing the pump from the alarm circuit, so you'll still
> get the light, but the pump won't shut off in the middle of a pull.

To do that, I'd have to move the sensor up on the tank. Given it's
a plastic tank, that may prove non-trivial - but it certainly
warrants exploration.
Thanks, n

--
M for N in address to mail reply


 
Date: 25 Jun 2007 11:49:27
From: daveb
Subject: Re: Low Water indicator
May suggest that the low water cutoff be removed from the pump and cut off
the HEAT instead??

I know of machines that do exactly what yours does, but what they should
have done is cut the heat!

you may need to add a relay to handle the much larger current drawn by the
heater >1200 watts usually vs. 40 or 50 watts.

dave
www.hitechespresso.com