Weekzer meter
A plasticizer meter is an analogue electrical measuring instrument that is used to determine the voltage (U), current (I) or resistance (R).
A plasticizer meter is made up of an iron plate attached to an axis (the 'soft iron'), which is partly located in a coil (electromagnet). Due to this structure, this type of meter falls into the category of electromagnetic meters.
As soon as voltage is applied to the coil, a current will flow through this coil, causing a magnetic field which will draw the iron plate less or more, depending on the current through the coil, into the coil. The opposition is caused by the small springs on the shaft on which the plate is mounted. The equilibrium situation between the magnetic force of the coil and the force of the springs is a measure of the quantity to be measured. The damping of the pointer is generally effected by the displacement of air with the aid of a damping mechanism, for example a damping wing with damping box. Occasionally eddy current damping is applied.
A plasticizer meter generally has high self-consumption and a non-linear scale. The scale will appear somewhat logarithmic because the shape of the plate is chosen so that the logarithmic character of the system is changed to a somewhat more linear-looking scale. The meter is also resistant to a short overload. In contrast to the rotational speed meter, the plasticizer meter is not direction-sensitive and is therefore suitable for measuring both direct or direct current (DC) or alternating current or alternating current (AC).
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