What do you think of the pressure gauges with snow?
There are two scale tables and multi scale forms in the air conditioning snow scale. We usually read the outer ring scale, and the other scales have the following indication, which represents the evaporation pressure of refrigerants under different refrigerants.?The outer ring (black scale) for pressure values, in the 2 circle (red scale) are a number of snow (R22, R12) corresponding to the temperature value.
There are usually several laps, respectively, black, blue, red.The pressure and saturation temperature of different refrigerant are different. At each end of the circle is marked with a unit or species.
This table has a few laps scale, standard is temperature, there is the subject of pressure, there are usually several pressure scale, corresponding to different units, corresponding to the temperature is under the pressure of the refrigerant saturation temperature, should pay attention to and use the same model of refrigerant
