It's not clear to me if the IHD is perfectly synced with the data at the meter or if it's a guide as to approx what's going on?
For example, if the IHD temporarily lost its connection to the meter, would the data be lost on the IHD or does it pull the data back in once it's reconnected?
What makes me ask is I came across a post on here where someone was given instructions on how to submit their meter reading manually via the IHD. So I assume it's in sync and the reading on the IHD should always read the same as the meter? Does that account for temporary loss in connections? Or even at the extreme end what if I unplug the IHD for 1 week, when I turn it on will the IHD be 1 week behind or will it just sync up?
As the above recommendation doesn't sit right with my current experience. I've seen it say "lost connection" a couple of times which is 0.1% of the times I've had a glance at it. However I have seen it sat at 3.70Kw for approx 20minutes, not moving 0.01, completely static. I put the kettle on and it still stayed at 3.70Kw. This made me lose faith in the IHD as a accurate gauge I assumed it must be just a guide. Unless this is part of the sync process? IF the IHD is behind the meter it ups the consumption at a static rate until they sync?
Best answer by Transparent
If I recall the post you're thinking of, I think it was the other way around. They were trying to do a manual reading from the IHD and couldn't find the "9" button to press. They were directed to take the reading from the Smart Meter itself.
The updates from the Electricity Smart Meter to the IHD should be sent at intervals of around 1 minute. Perhaps someone else who has a Chameleon can confirm this.
The registers holding the usage data are in the meter. Although I don't have a Chameleon, I would expect it to pick up the latest readings from there rather than rely on a previous reading which it had retained in its own memory.