. Electrical news and engineering . Jt ^ ^ /Ui ;| 1 EDISON SwiRE Meter meter which, as has already been stated, consists of a Germansilver shunt in multiple with a compensating spool in series with itthe electrolytic cell. The connections, youll , are sim-plicity simplified. In Fig. 7 is shown a 4 bottle 3 wire meter, .andis simply two 2 wire meters in the one box. The object of havingthe two cells in multiple is that one bollle acts as a check onthe other. In a meter of this kind we have practically four 2 wiremeters, the two shunts being common to the 4 meters. If wewished to have th
. Electrical news and engineering . Jt ^ ^ /Ui ;| 1 EDISON SwiRE Meter meter which, as has already been stated, consists of a Germansilver shunt in multiple with a compensating spool in series with itthe electrolytic cell. The connections, youll , are sim-plicity simplified. In Fig. 7 is shown a 4 bottle 3 wire meter, .andis simply two 2 wire meters in the one box. The object of havingthe two cells in multiple is that one bollle acts as a check onthe other. In a meter of this kind we have practically four 2 wiremeters, the two shunts being common to the 4 meters. If wewished to have the same check with 2 wire ineters on a 3 wiresytem of any olhes make, there would have lo be 4 of these. In practice we find that the transfer of zinc in each pair ofbol ties on the same side of a 3 wire system in very many casesagree exactly to a milligram, and Ihe maximum variationnever exceeds a few milligrams. This sliows wilhout doubt. EDISON CHEMICAL 5-WlRE METER r.« 7. the accuracy of llie meter and when we have a read-ing on a meter of this kind and the bill sent out accordinglyand the customer swears by everything holy that he neverturned the lights on, you are perfectly safe in assuining that ifhe did not turn them on then some one else did it for him. Thecustomer says one thing and we have two meters silently testify-ing the other way. Which of the two are you to believe ? Themeter by all means. The following table gives the sizes and other particulars of themeters as made to-day. THREE WIRE. Size. Capacity. R. of Shuntin ohms. R. of spoolat 60. R. of bottle. Capacity amp. lamiS. 1 2 48 10204080 . 2-52-52-52-5 4080100320 TWO WIRE. I 10 .04 2-5 20 2 20 .02 2-5 40 4 40 .01 2-5 80 8 80 .COS 2-5 too 16 160 .0025 2-5 3-o Youll observe that the R of the shunt varies while that of thespool and bottle remain constant for the different sizes. I
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