If any equipment (board, circuit, device or LTUC) becomes defect, several trials are made to reactivate this eqipment, before it is finally locked. After every deactivation, this equipment is locked for an adjustable time ("locktime"). When the equipment has been reactivated, it must stay stable for an adjustable observation time ("stabilisation time"), before it is finally put back in service. If the equipment becomes defect within the stabilisation time, a further trial is made to reactivate the equipment after the next lock time. In total, a maximum of 8 reactivation trials is possible. The lock times should be in ascending order. A lock time = 0 means, that no further reactivation trials are made. The lock- and stabilisation times can be processed by AMO PSTAT.