Keysight E8402A, E8404A C-Size Mainframes User and Service Guide 103HISTory Subsystem Programming the Enhanced MonitorHISTory:VOLTage:MAXimum? <supply>HISTory:VOLTage:MINimum? <supply>HISTory:VOLTage:MAXimum? returns a single floating point number forthe maximum voltage measured by the Enhanced Monitor for the sinceeither manufacture of the mainframe or the most recent HIST:RES:VOLT orHIST:RES:ALL.HISTory:VOLTage:MINimum? returns a single floating point number forthe minimum voltage measured by the Enhanced Monitor for the sinceeither manufacture of the mainframe or the most recent HIST:RES:VOLT orHIST:RES:ALL.ParametersReturned DataComments– The maximum and minimum voltage tracking can be zeroed by theHISTory:RESet commands.Error ConditionsThe following table lists the most common error conditions and causes. Errornumbers and corresponding messages can be found using SYSTem:ERRor?query.Reset ConditionA *RST has no effect on the HISTory subsystem.Name Type Range Default Description<supply> enum. P5, P12, N12, P24,N24, N5PT2, N2,P5STbynone selects the power supply for themaximum voltage request. P5 ispositive 5 Vdc supply, N12 isnegative 12 Vdc supply, etc.Type Range Descriptionfloat. Minimum or maximum voltage.Number Message Probable Cause-224 “Illegal Parameter” the parameter was not correct.-311 “Memory error” the historical data’s memory is not available.
