A well-soldered system may operate for an extended time — perhaps even 20 years — without needing a charge. But, because no system is perfect, the equipment still has leaks. Those leaks may not be ...

For newer technicians on the job, here are a couple of HVAC service tips about leak testing and evacuating after repairing a system. The best way I've found to leak test a system is to pressurize it ...

False positives can occur when performing sterile integrity testing. Understanding how to identify them can help minimize their occurrence in future package designs. By Curtis L. Larsen Some medical ...