Re: z wave energy meter DSB28
Posted: Fri Jan 09, 2015 11:04 am
I have the same effect sometime the device delivers wild numbers
-negative Energy (V*A*time) (not possible)
- energy less than before (not possible) it has to continuously increase
- very large power (V*A) and also negative numbers (not possible)
if you want to use the energy number to do graphs you need to exclude these numbers and if you do a reset of your data every day/week indigo it becomes very difficult to ignore them as they could come from a regular reset you could do on the unit of just junk data.
it looks like the a/d converter reacts to spikes from the em- sensor and is using a positive integer number range (integer where the first bit is not the sign) and goes into overflow, but then if the first bit gets set indigo might interpret that as a negative number.
Karl
-negative Energy (V*A*time) (not possible)
- energy less than before (not possible) it has to continuously increase
- very large power (V*A) and also negative numbers (not possible)
if you want to use the energy number to do graphs you need to exclude these numbers and if you do a reset of your data every day/week indigo it becomes very difficult to ignore them as they could come from a regular reset you could do on the unit of just junk data.
it looks like the a/d converter reacts to spikes from the em- sensor and is using a positive integer number range (integer where the first bit is not the sign) and goes into overflow, but then if the first bit gets set indigo might interpret that as a negative number.
Karl