The intelligent electronic instrument of the refrigerant group is an auxiliary instrument for the installation, testing and maintenance of refrigeration equipment such as air conditioners and cold stores. Instrument uses high-strength engineering plastics and flexible non-slip silicone, the whole machine is solid and comfortable to hold. Built-in 32-bit digital processing unit and high accuracy data acquisition unit, high data quality and stability. Large liquid crystal display, support LCD backlight, data display clear and legible, convenient light operation. Long-life valve switch, standard 1/4 inch interface for durability and versatility of the instrument.Built-in database of 89 types of data on refrigerant pressure and evaporation temperature,It also calculates the overheating of the cooling to facilitate direct reading of the working process data.It also tests the percentage of vacuum measurement;pressure leak measurement, leakage time speed record.It deserves that this multifunctional, accurate and easy-to-use digital splitter allows you to do your job well.EC/EN61010-1 safety standards for design and production.1) The pressure measured by the digital collector pressure gauge is pressure gauge.2) Pressure tests range from -101Kpa to 6Mpa (-0,1bar to 60bar).3) Limit pressure is 10 Mpa (100 bar).4) The maximum working pressure of a standard hose is 600 PSI (about 4,13 MPa, 41,3 bar). The limit pressure is 3000 PSI (about 20,68 MPa, 206,8 bar).5) Before proceeding with the testing, the rated pressure of the equipment tested must be confirmed. Do not use it if it exceeds the scope of the instrument. Also in the case of DY517A, if the packed hoses do not meet the pressure requirements,you can use suitable substitutes for testing.6) Do not use and store the instrument at high temperature,high humidity, flammable, explosive and strong electromagnetic fields.7) Please do not change the internal circuit of the instrument,to avoid damage to the instrument or danger.8) Skilled protective equipment should be worn during testing,to protect the user.9) Please use the instrument in a well-ventilated environment,to prevent the inhalation of toxic gases.