Level 1
No equipment needed.
A load profile is visible through ReCalc and is unitless.
Level 2
Equipment: Clamp-on ammeter for ampere [A] or energy meter for watt [W].
Level 2 is able to measure on cables with evenly balanced loads across all phases. If the load varies between the phases the tolerances increase.
An example of Level 2 3-phase calibration
Level 3
(This level is not yet available)
Level 4A
(This level is not yet available)