Re: Re: Comfort Prices ?!?

["Dean Smith" <ukha@xxxxxxx>]

The Comfort sensor appears to be a "Current Transformer" style.
Where the
monitored cable is in affect the primary winding.

As far as I can tell the key component (the Current Sensor) would be
399-7244. Nuvotem ASM-010
(http://www.nuvotem.com/en/products/asm.html)

This provides a millivolt output relative to the current. The detected
currents are probably at the very bottom of the sensitivity of thse so I'd
need to detect the presence or otherwise of a very small millivolt signal.
=
-
Unfortunately I have no idea how to use that in conjunction with a Comfort
Style Input Though I'm guessing someone does ;-)

Dean


----- Original Message -----
From: "Paul" <groups@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Tuesday, May 27, 2003 10:43 AM
Subject: RE: [ukha_d] Re: Comfort Prices ?!?


Having a quick look through the RS catalogue - there are quite a few 'Hall
Effect' current sensors in there - they are pretty pricey though, ranging
>from
ound
it though.



Paul.

-----Original Message-----
From: Patrick Lidstone [mailto:patrick@xxxxxxx]
Sent: 27 May 2003 10:32
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: Comfort Prices ?!?



--- In ukha_d@xxxxxxx, "Dean Smith" <ukha@e...> wrote:
> The pump has in-built flow switches so I'd need to dig around in the
> internals to get a feed after the switches, but before the pump
itself.
>
> But maybe I'll see if there any obvious "inspection" covers
tonight ;)
>

Ahh, ok.
Do check that the quiescent current consumption of the pump is zero
when it's not operating. If the flow switches are doing anything more
sophisticated than switching mains, then the current associated with
powering any on-board controller when the pump is in "standby"
may be
enough to trigger a current detector.

Patrick