How to Use an Automotive Air Conditioning Pressure Gauge?
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The method for using an automotive air conditioning pressure gauge: The gauge marked with blue is the low-pressure gauge, used to measure low-end pressure and vacuum. Readings greater than zero in the clockwise direction indicate pressure scale, while readings greater than zero in the counterclockwise direction indicate vacuum scale. The gauge marked with red is the high-pressure gauge, used to measure the high-end pressure of the air conditioning system. The pressure in an automotive air conditioning system is influenced by various external conditions, such as ambient temperature, engine speed, and condenser cooling conditions. Therefore, the standard for testing automotive air conditioning system pressure is based on a specific ambient temperature, compressor speed within a certain range, and condenser cooling under certain conditions, rather than a fixed standard.