Patent ID: 7937232

Claim:
A method for calculating timestamps, the method comprising: receiving, to a data management system including at least one processor, a first data point from a data source device configured to detect a condition of a processing chamber; reading a time from a reference clock to generate, using the data management system, a first timestamp for the first data point, the reference clock being separate from the data source device; storing the first timestamp and the first data point in a non-transitory computer readable storage medium; receiving a second data point from the data source device to the data management system; calculating, using the data management system, a second timestamp for the second data point by adding a computed value to the first timestamp, generated using the time from the reference clock, wherein the computed value represents an amount of time based at least in part upon a number of clock ticks of a clock of the data source device transpiring between measurement of the first data point and measurement of the second data point, each clock tick of the clock of the data source being determined to correspond to a period of time; and storing the second timestamp and the second data point in the non-transitory computer readable storage medium.