Current Cost Support Forum

A support forum for Current Cost users, partners and developers. Covering hardware, software and web.
Site Announcements

The support forum is moderated Monday to Friday, UK time. To submit a support ticket, please email: helpme [at] currentcost .com

It is currently Wed May 27, 2020 1:04 am

All times are UTC [ DST ]




Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 5 posts ] 
Author Message
 Post subject: IAM versions?
PostPosted: Sun Aug 14, 2011 6:56 am 
Offline

Joined: Sun Aug 14, 2011 6:41 am
Posts: 7
I have three of the original IAMs, although a general backlog of home projects means that i've only just got around to thinking about updating my hacked-together Perl code for parsing the XML from the Envi meter to really make use of the output. Anyway, while Googling I noticed that the IAMs have taken on a new design, and was wondering if there's a functional difference - the other post on this forum says "the MkII IAM's for the UK market that measure AC Watts? Volts x Amps x Power Factor", which suggests that there is? i.e. that the MkI ones don't do this? So does this imply that the MkI ones are ok as a 'switch' (detecting tumble drier on/tumble drier off) but not as an accurate reading, especially for lower power, always-on devices?

Also I get the impression that a second generation bridge may handle IAM output, is this a definite commitment that it WILL do this (... and I can retire my always-on Viglen MPC-L...) or just a wishlist item? I have the original bridge, but the functionality is rather limited to updating Google PowerMeter (RIP) - although, to be fair, I doubt it's intended for people who like the idea of hacking together their own monitoring code...

Sorry if it's written down somewhere on the CC website, I couldn't find it.


Top
 Profile  
 
 Post subject: Re: IAM versions?
PostPosted: Tue Aug 23, 2011 8:51 am 
Offline

Joined: Sat Apr 16, 2011 1:10 pm
Posts: 328
Location: East Sussex
The MkI output the same data as the MkII IAM's

The MkI's are physically smaller and have the antenna which can be angled if required.

Re accuracy the MkII's seem better and the MkI's only measured the load current.

This can cause the reading to be wrong reading high watts when the device is only drawing under 1watt and may also be out reading a load with a AC induction motor in it.

Automan.


Top
 Profile  
 
 Post subject: Re: IAM versions?
PostPosted: Tue Aug 23, 2011 3:00 pm 
Offline

Joined: Tue Jul 05, 2011 11:46 am
Posts: 35
do you mean that it measures true power ie allows for the pf? Does that mean that it measures both the voltage and the current ie with 2 separate connections? How? John


Top
 Profile  
 
 Post subject: Re: IAM versions?
PostPosted: Thu Aug 25, 2011 11:07 am 
Offline

Joined: Sat Apr 16, 2011 1:10 pm
Posts: 328
Location: East Sussex
johnlee wrote:
do you mean that it measures true power ie allows for the pf? Does that mean that it measures both the voltage and the current ie with 2 separate connections? How? John


It is moulded into a 13amp plug adapter so actual voltage is available to the electronic circuit to analyse the waveform and work out the power factor.

As do many plugin power monitors.

Automan.


Top
 Profile  
 
 Post subject: Re: IAM versions?
PostPosted: Sat Aug 27, 2011 10:15 am 
Offline

Joined: Sun Aug 14, 2011 6:41 am
Posts: 7
Quote:
This can cause the reading to be wrong reading high watts when the device is only drawing under 1watt and may also be out reading a load with a AC induction motor in it.


Ah, I guess that explains why my Mk. 1 IAM reads 15W for the washing machine when it's not doing anything?


Top
 Profile  
 
Display posts from previous:  Sort by  
Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 5 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group