Blog / Tag
#metering
4 posts filed under this tag, newest first.
Modbus RTU on energy meters: six things that break
Wiring, termination, byte order, register offsets, phantom registers and polling intervals — the real RS485 failure modes, and how to tell them apart.
7 min read
Energy meter showing wrong readings: a checklist
Work out how wrong it is first — the size of the error names the cause. Ratio errors, reversed CTs, saturation and the ones that look plausible.
7 min read
Choosing an energy meter for IoT: what actually matters
Accuracy class, register map, protocol and documentation — the four things that decide whether a meter becomes a data source or an expensive display.
6 min read
CT ratio and burden: picking a CT that reads correctly
Why lead resistance dominates the burden on a 5 A secondary, what the S in class 0.5S buys you, and how an oversized ratio quietly loses accuracy at part load.
7 min read