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1) Definition of nominal value: The quantity that is marked on the gauge to indicate its characteristics or to guide its use is called the nominal value.
2) Characteristics of the nominal value: It is a measurement result, which is unique to the measuring instrument and a known value.
3) The role of nominal values ​​in the verification of environmental test equipment:
The environmental conditions required in the environmental test are provided by the test equipment, and the nominal value of the environmental conditions specified in the test method standard is an ideal value. In actual tests, due to various factors, the actual values ​​of the environmental conditions provided by the test equipment are affected. The nominal value can be approached and the nominal value cannot be reached. The degree of proximity depends on the accuracy of the test equipment control system. Its function is reflected in two aspects:
a. The nominal value is the basis for the test equipment control system settings.
b. The nominal value is the basis for calculating the environmental condition deviation at each point of the working space of the test equipment.
The nominal value of the working space environment parameter is one of the important features of the environmental test equipment, and is the basis for calculating the deviation of the environmental parameters, and is the basis for the verification of the environmental test equipment.