The present invention relates to a process for separation of diols from a mixture comprising diols and polyols, for example, from a reaction mixture obtained from hydrogenolysis of sorbitol. The machinery protection monitoring system includes a memory configured to store a plurality of alarm escalation rules associated with an operational protection function of an industrial machine, and a processor communicatively coupled to the memory and configured to utilize the plurality of alarm escalation rules. Also, the frequency of the resonator is adjusted in accordance with an external time reference. The processing circuitry determines strong extremal regions based upon significant overlap between the intensity extremal regions and depth extremal regions. A communications method including coupling an analog to digital converter to a radio frequency identification device. After the PLL loop is locked, sense amplifier 44 detects the ripple current with the superimposed compensating current, and based on the detection result, updown counter 45 and DA converter 40 control compensating circuit 43, and the difference between the ripple current and the compensating current is reduced.