Refrigeration第 65 / 110 题
A micron gauge is used during evacuation to measure what?
a.Refrigerant weight
b.The depth of vacuum in the system
c.Superheat
d.Airflow
解析
A micron gauge measures the absolute pressure (depth of vacuum) far more precisely than a compound gauge, confirming that the system is dry and tight. Technicians pull the system down to a target micron level and perform a decay test. Failure to hold vacuum indicates moisture or a leak.
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