The present invention provides a display capability tester of
magnetic powder or a magnetic suspension. The tester comprises: a display apparatus, wherein the display apparatus comprises a display test block, a center conductor for providing a
magnetic field for the display test block, and a connection
electrode for electrifying the center conductor, and the display test block is provided with an artificial defect; a
magnetization power supply, wherein the
magnetization power supply is connected to the connection
electrode, and provides an adjustable
magnetization current for the connection
electrode; a demagnetization apparatus, wherein the demagnetization apparatus comprises a
demagnetizer connected to the connection electrode, and is provided for demagnetizing the display test block; a control apparatus, wherein the control apparatus is provided for electrically connecting the magnetization power supply and the demagnetization apparatus, and comprises a magnetization switch for opening the magnetization power supply, a demagnetization switch for opening the demagnetization apparatus, and a current adjustment mechanism for adjusting a magnetization current of the magnetization power supply; and an indication apparatus, wherein the indication apparatus comprises an
ammeter for indicating a magnetization current value of the magnetization power supply. The display capability tester of the present invention mainly has the following advantages that: by providing the standard display test block and the adjustable magnetization current, a
test platform with characteristics of convenience, accuracy and capability of reference comparison is provided for display capability of the
magnetic powder or the magnetic suspension.