Hvac Shop Blog
Meeting AS/NZS Refrigerant Handling Standards with Testo 557 (Australia-Wide) — How to Use Testo 557 Vacuum Probe
From Cairns to Adelaide, this guide shows how to use the Testo 557 vacuum probe to verify deep vacuum, log microns, and meet Australian standards. We compare Testo 557 vs Fieldpiece SM480V on vacuum method, wireless range, and app workflow, then cover calibration and documentation tips to keep audits simple.