Elimination of false rejects in contaminated leak test equipment
A Sentinel A28 unit had internal contamination from dust and water. All parts were being rejected for supposed leaks — false rejects that were affecting production. Lübeck repaired the unit the same day and loaned a temporary unit to keep the line from stopping.
The unit was rejecting all parts — but the parts had no leak
The client manufactured automotive electrical connections with high quality and repeatability requirements. A Sentinel A28 unit had internal contamination from dust and water accumulated in the pneumatic circuit. As a result, the instrument detected leaks where there were none — generating false rejects on 100% of the parts.
Repair, loaner equipment, and preventive improvement — all the same day
Comprehensive intervention: Lübeck repaired the unit, loaned a temporary one so the line wouldn't stop, and resolved the root cause by installing proper filtration.
Specialized corrective maintenance
Internal pneumatic circuit cleaning and complete repair of the Sentinel A28 unit. Elimination of dust and water contamination.
Temporary loaner equipment
To avoid line stoppage during the repair, Lübeck loaned a functional unit to the client. Operational continuity guaranteed.
CKD filter train
Installation of a CKD filter train to improve compressed air quality feeding the instrument — preventive solution that attacks the root cause of contamination.
Same-day repair
Equipment repaired and returned operational in the same shift. No additional days of production impact.
Zero false rejects. +1 year stable. 48 units in calibration.
"The client continues to contact Lübeck for technical support, repairs, and specialized consultations, building a long-term trust relationship."
— Portfolio documentation, case 08
False rejects
have a root cause.
If your leak test equipment rejects good parts or gives unstable results, we can diagnose the contamination, repair, and improve air quality — without changing equipment.