902 



Voltaic Electricity. Section 3: Electro-Magnetic Current Measurements. 



No. 61523 



61 523 A. 1:6. 



61 523 B. 1:6. 



61 527. 1 : 5. 



in. :.L'.{. Dead Beat Universal Moving Coil Measuring Instrument, Deprez-d'Arsonval system, * <i 

 I-' i g s. A and B, for Direct Current, with moving system (which can be taken out). 

 Can be used (1) as an Ammeter, range 10 10 amps., (2) as a Voltmeter, range 

 .">() 50 volts, (3) as a Vertical Galvanometer, range 2 2 milliamps. and 

 2000200 millivolts. Can be. read from both sides (see Figs. A and B) r. 1(1. n 



The instrument is constructed on the Deprez-d'Arsonval system; it has a moving coil in a very 

 powerful magnetic field. Consequently it is independent of its position in regard to the magnetic meridian 

 and of external magnetic influences. The instrument has three pairs of terminals designated respectively 

 "Amp."; "Volts": "Galv.''; the leads are to be connected to these in accordance with the various modes 

 of employment. Two flex i Me cords wit h plugs on the ends are fitted on the moving coil. These plugs are inserted 

 in the ping-holes of the terminals designated "Amp." or "Galv." when it is desired to use the instrument 

 .i> an Ammeter or a galvanometer. When used as a voltmeter one plug is placed in one of the terminals 

 designated. "Volts", the other being inserted in the plui;- hole of the resistance coil (see l-'ii;. li l..~>2.'! A). 



(i !..")!' I. -- idem, moving system cannot be withdrawn ft. U. 



HI. .vjft. Glass Case with brass mount for Nos. ui. :>>:> or til. 524 Price, cadi o. i.v o 



il. 2421,2420, 



2432. 



