This standard applies to the calibration of Electric heated incubators of constant temperature in laboratories and the calibration of similar equipment. Among the cited documents are "General requirements for the safety of household and similar electrical appliances", "Safety requirements for household and similar general-purpose electronic and related equipment powered by grid power supply" and "Safety of electric heating equipment". The standard aims to standardize the calibration conditions, items, methods, result processing and calibration period of Electric heated incubators of constant temperature to improve the calibration mass. The structure of the incubator adopts natural convection ventilation, with uniform indoor temperature, which is suitable for fostering microorganisms, bacteria, etc. Technical requirements include Appearance and functional display, insulation performance, etc. For example, the nameplate should be marked with the name of the instrument, Manufacturer, Specification model and other information, Appearance should be in good condition, function keys, adjustment knobs should be able to adjust normally, insulation resistance should meet the requirements.