RE: what IS the 'Unbioctium'

["Neil Ball" <neilball@xxxxxxxxxxxxxxx>]

No, I have both the original CC package and the new CC128. My original
unit
had been installed and operating for months now so when the new CC128
arrived I decided to run them as completely separate systems to see if
there
was any variation between them, I'm effectively running both complete
packages in parallel but on the same cable. So I have 2 standard
transmitters with CTs both fitted in the same location (my main external
meter cupboard) and both CTs clamped around the same live cable. This was
as
much about me being lazy when the new unit arrived - I could not be
bothered
to re-register the new CC128 display unit to the original transmitter and
simply wanted to see if the new unit was operating correctly (having
previously had an original display where many of the LCD elements had
failed). I was simply expecting to see a similar readout on both displays
but now have a big discrepancy between the two. I will be able to test in
various ways to work out what is actually going on (could be a
transmitter/CT fault problem, interference between the co-located
transmitters/CTs, bug in the CC128 or original CC display etc). This is all
before I start logging data from the units which may also highlight issues
-
I know of one user where the data from the serial port and that shown on
the
display are quite different.



_____

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Kevin Hawkins
Sent: 18 February 2009 12:23
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] what IS the 'Unbioctium'



Do you have mutiple CT's then on different consumption circuits ?

The way to connect two sensors to one display is via the extra current
transformers supplied with a jack plug that plug into the end of the
existing black box. YOu then get two electric bolt graphics to left.
Once connected you get the power outputdata sent individually and
correctly by the XML data but it is summed by the display as it treats
it as three phase. If you connect two black boxes transmitters then
the default pairing of the new CC128 to the boxes causes an alternation
of the sensor display as each one transmits - very easy to see as the
display switches readings - and of course this messes up the cumulative
figures. The FAQ says you can overcome this this by redoing the
pairing setup. Strangely I dont think you can use the CC128 to
actually monitor two different circuits by a button selection regardless
of whether its two sensors to one transmitter or two transmitters. You
need to be using the XML reports. Of course using one transmitter to
two remote displays should give identical results.

On my older CC my accuracy seems about 25% off cf the official
metering. I haven't had the new one long enough to see if it's any
different but I can't see any reason why it should be as the transmit
data is sourced the same. What I have noticed is that at low KWHR -
switching on a 60W light might increase the reading by say 55 W but
switching it off might only reduce it by 30W - not sure why this is and
there are so many other possible causes I never bothered to see if it
was really consistently happening.

K

Neil Ball wrote:
> My CTs are correctly installed and my original CC unit records the
power
> with reasonable accuracy. It is the 2nd transmitter and new CC128 that
are
> reading low so I'll have to do some testing to see what the issue is
i.e.
do
> I get the same results if I completely remove the original transmitter
and
> only leave the new unit, what happens if I register both displays to
the
> transmitter etc. I just wondered if anyone had both old and new
installed
as
> parallel systems as I had & whether they noticed any discrepancies
between
> them.
>
>
>
> Neil B.
>
>
>
> _____
>
> From: ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com
[mailto:ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com] On Behalf
Of
> craig
> Sent: 18 February 2009 09:52
> To: ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com
> Subject: RE: [ukha_d] what IS the 'Unbioctium'
>
>
>
>
>> CC128 shows less around half the value of the original unit.
Anyone
>> else
>> have any issues like this?
>>
>
> My original CC unit shows ~50% of the actual power used, as measured
at
the
> electric meter over 7 and 30 days. It is mounted at 90deg to live
feed,
and
> cable is centre to clamp.
>
> Stuart explained in a previous post it was the way the CC measured the
power
> vs. the way the electric meter measures.
>
> It seems there are some new users of CC, can you read the meter when
you
> install, and again at 7 & 30 days after, and compare to what CC
displays
for
> last 7 days & last 30 days?? This would help me determine if my CC
is out
of
> spec (CC are not answering my emails :( )
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>





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