In the laboratory management process, usually green, yellow and red colors to indicate the state of the machine, the self-tested qualified for qualified equipment for normal use of equipment, should use the green mark, the loss of certain functions but the detection of work used in the function is normal and calibrated qualified as well as degradation of users are quasi-use of the equipment, for the yellow mark, the original equipment by degradation of the use of the transfer of the use of the cessation of use The original equipment from the degradation of use to stop using, should be timely to change the yellow quasi-use marking to red deactivation marking.