Re: what IS the 'Unbioctium'

[Kevin Hawkins <yahoogroupskh@xxxxxxxxxxxxxx>]

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@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> craig
> Sent: 18 February 2009 09:52
> To: ukha_d@xxxxxxx
> 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]
>
>
>
> ------------------------------------
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