Patent ID: 9625892
Date: 2017-04-18
CPC Classifications: A61B,G01D,G01N,G05B

Claim:
1. A method for monitoring device calibration, comprising: providing an asset management computer communicatively coupled to a plurality of field devices in an industrial facility said asset management computer including a processor connected to a memory device having a first non-transitory machine-readable storage medium storing a field device drift identifying (FDDI) program, wherein said asset management computer is programmed to implement said FDDI program to cause said asset management computer to execute for each of said plurality of field devices: statistically determining at least one process control limit from historical parameter data received from each of said plurality of field devices, said process control limit based on at least one of a frequently occurring lower value and a frequently occurring upper value; continuously sampling current parameter data received from each of said plurality of field devices; comparing said current parameter data to respective ones of said process control limits for each of said plurality of field devices to determine whenever any of said current parameter data is outside said process control limit for identifying a first device drift for a first field device of said plurality of field devices, and responsive to identifying said first device drift, generating an alert that said first field device needs calibration.