With the aid of the Residual Field Indicator 3821.002 the residual magnetism in a workpiece can be checked e.g. after magnetic particle crack detection. As well the position and polarity of magnetic poles can be identified. Residual Field Indicators are very sensitive against small changes of a magnetic field. Therefore, they are best suited for comparative measurements, e.g. in order to distinguish between sufficiently and insufficiently demagnetized parts.
Description: A small magnet, to which an external magnetic field exerts a torque, is mounted onto the revolving axis of the instruments pointer. Another magnet inside the housing keeps the pointer in zero position as long as no external magnetic field is present. The magnetic field intensity is measured at the movement staff location, i.e. on the axis where the revolving magnet is mounted: 16 mm apart from front and rear side of the housing. The axis of the pointer is 16 mm apart from the bottom side of the housing, where the “TEST” mark indicates the edge which should be in contact with a workpiece when using the Residual Field Indicator. One end of the pointer axis is visible through the glass.
