Electrical measurement indicating instrument calibrator

The utility model relates to an electric measuring and indicating instrument adjusting device, comprising an electric measuring signal generating unit used for supplying testing signal for an checked instrument, a measuring unit used for supplying standard values as the reference of the tested instrument and a microcomputer used for main control, error calculation, data management and statement generating. On a checking unit, an image collector is arranged above the checked instrument; the video output port of the image collector is connected with the input port of a digital image converter through a video transmission line; the output port of the digital image converter is connected with a corresponding port of the microcomputer; the control port of the image collector is connected with the output port of a controller of the image collector through controlling line; the input port of the controller of the image collector is connected with the control signal output port of the microcomputer through controller communication line of the image collector to control the image collector so as to realize the microcomputer parameters adjustment, such as image contrast and focal distance.