4.7.9. Out of Regulation

Out of Regulation indicates a high error between an internal control value and the value measured at the alx terminals. This can occur when the controller is forced into a condition that it can not regulate and is failing to reach the desired set point. For MagnaLOAD electronic loads, this can happen if MOSFETs operate in the linear region, or when the control gains are too aggressive, or the external source is unstable. In Out of Regulation accumulation in the feedback compensator is stopped to prevent integral wind up from over driving the MOSFETs. When terminal measurement return to expect values, the fault clears itself, and the compensator returns to normal operation.

4.7.10. Below Min Operating Voltage

The MagnaLOAD electronic load dissipates power by controlling the current entering the product. Controlling the current is only possible when there is sufficient voltage across the input terminals, for putting internal transistors into the saturation region. When voltage drop below 0.25% of the alx’s voltage rating it enters a Below Min Operating Voltage fault and performs the same actions described in Out of Regulation. When voltage goes above 0.25%, the fault clears itself, and returns to normal operation.