Sechrist technician was dispatched onsite on 2/26/2016.Technician performed max pressure test, checked/inspected control panel tubings and other components for possible leaks.Performed chamber control system calibration iaw section 11.5 (electronic control module manual).Performed & completed operational/verification.(b)(4) staff and technician ran chamber for 90 minutes w/rs of 1.5 & ps of 2.4 ata, chamber maintained pressure for duration of test.A review of the device history record (dhr) shows no indication that there were any relevant discrepancies during manufacturing and found no nonconformance that could cause or contribute to the reported issue.
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