MTS Series 793 Application - Manual (Page 367)

Peak/Valley Change Detector Process
MTS MultiPurpose TestWare® Event Process Descriptions 367
Peak/Valley Change Detector Process Example
Suppose you want to acquire a cycle of data each time the peaks or valleys of an
input signal change by a specified amount. Further, suppose you define a Peak/
Valley Change Detector process with the following parameters:
• Trigger continuously
• Tolerance: ±50 lbs
• Sensitivity: 5 lbs
The test command cycles between ±0.0001 strain and you are monitoring a force
signal.
Each time the peaks or valleys on the force signal change more than ±50 lbs, the
process generates a trigger signal that starts a data acquisition process.
The data acquisition process would use the Peak/Valley Change Detector
process as its start trigger. A single data acquisition process could be run multiple
times with this change detector.
Note It is good practice to specify a number of cycles to run before you begin
monitoring to allow a “settling in” period.
Strain Command
100 lbs ( ± 50 lbs) Bands
Trigger Data Acquisition Processes
Force Signal