Abstract: A method for detecting installation and/or calibration errors in signal output units of a partial-discharge measurement system, where the signal output units are arranged at various points in an electrical insulation system, includes: Calibrating a selected one of the signal output units by injecting a first calibration pulse between a high-voltage side of the insulation system and ground. Storing calibration data obtained during the step of calibrating. Recording and storing a first set of partial discharge signals and an amplitude of the first calibration pulse via the selected signal output unit. Adopting the stored calibration data for the selected signal output unit, for calibrating the other signal output units. Recording and storing, via the other signal output units, a second set of partial discharge signals and an amplitude of a second calibration pulse. And, comparing the stored partial discharge signals for all the signal output units with one another.