Power meter convenient to calibrate

The utility model discloses a power meter convenient to calibrate, which comprises a protective shell, a grip is fixed at the bottom end of the protective shell, a hinge is fixed on the surface of the protective shell, an observation door is fixed at one end of the hinge far away from the protective shell, and a handle is fixed on the outer surface of the observation door. A first spring is fixed to the outer surface of the protective shell, a plug pin is fixed to the end, close to the observation door, of the first spring, a pull rod is fixed to the end, close to the first spring, of the plug pin, a rotating shaft is rotationally connected to the top end of the protective shell, and a cover plate is fixed to the outer surface of the rotating shaft; the side end of the protective shell penetrates through and is rotatably connected with a rotating handle. Through the design of a bevel gear assembly, an observation door, a cover plate and a rotating shaft, the power meter body can be conveniently put in and tak