Five Parameters Instead of One Gauge: How Digital Refrigerant Gauges Are Changing Field Diagnostics
Low evaporator-side pressure does not always indicate a refrigerant shortage. For accurate diagnosis, a service engineer needs a set of five parameters, not a single gauge reading. Digital refrigerant gauges, such as the Testo 550s, combine pressure and temperature measurement with automatic superheat and subcooling calculation in one tool.
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