Short answer: When a BSC certification test does not meet the applicable criterion, preserve the original observation or reading, identify the affected test and governing basis, record the cabinet status communicated to the customer, document corrective work separately, and create a new retest result with its own time and actor. Do not overwrite the failed value with the later passing value. The final certificate should reflect the completed decision while the underlying visit history retains the full sequence that led to it.
Lock the original field result
Store the failed reading or observation exactly as reviewed, along with the instrument, technician, timestamp, test basis, and notes. Corrections to transcription should be distinguishable from a new measurement or retest.
Record the cabinet status and customer handoff
The service record should show what status was communicated, to whom, and when. Operational software should avoid inventing safety instructions; the qualified certifier and customer's biosafety process determine the appropriate response.
Separate corrective work from the retest
Describe adjustments, repairs, parts, service personnel, and supporting attachments as corrective work. Then record the retest as a new test event. Combining both into one edited note makes it impossible to see whether the cabinet was actually re-evaluated.
Require completion review before issue
A failed required test should block ordinary certificate issue until the shop's defined resolution path is complete. If the work remains incomplete, represent that status clearly rather than forcing the visit into a passing or completed state.
Keep the complete history after a passing retest
A later passing result does not erase the earlier failure. The cabinet timeline should retain both results and the work between them, while the customer-facing certificate presents the final reviewed outcome and references the controlled visit record.
Primary sources
This guide covers documentation and service operations. It does not replace the current NSF/ANSI 49 standard, cabinet manufacturer instructions, customer requirements, or the judgment of a qualified field certifier. BSC Atlas is not affiliated with NSF.