Self sufficient electronic system for monitoring and continuous surveillance of steam traps, valves and installations using fluids. Prior to the reboot, a portion of the physical memory is copied either to a reserved memory space or to secondary storage, or one portion of memory may be copied to a reserved memory space and another portion may be copied to secondary storage. A silicon nitride layer is deposited overlying the pad oxide layer. Use of an efficient partial band reconstruction mechanism allows signal reconstruction using only the frequency subchannels that pertain to the signal of interest that is to be copied.