Developed for the classroom demonstration of the constructional features of permanent magnet moving coil type meters. Movement with spring control and magnetic damping and is fitted in transparent wooden casing with large glass window at the front and back. All interna mechanism and electrical connections are visible. Long pointer needle w!th thick arrowhead provides clear visibility from a distance. The wooden case has 4mm socket terminals on one side for electrical connections with a slot for inserting interchangeable scales just above it and a pair of knobs on the other side – one for zero adjustment and other for locking pointer needle. Can be used both as left zero and center zero meters. These are useful for demonstration as well as for actual measurements. It is made more versatile by using any of the scales from SCALES, INTERCHANGEABLE, FOR DEMONSTRATION METERS to convert it into a galvanometer, ammeter or voltmeter of different ranges. Accuracy Class Index 2.5, Scale Length 110 ? 2mm, Overall size 80 x 100 x 190mm approx.
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