. American telephone practice . ~ - micro-farad. IO 5 Convenient connections for making capacity tests are shown inFig. 640, where G is the galvanometer, 5 the shunt, C the stand-ard condenser KK discharge keys, V the selecting switch and B, TESTING. 875 a battery of eight or ten cells. With the switch, V, at the left andboth discharge keys depressed, the current from the battery willflow into the condenser, thus charging it. Upon the sudden releaseof the discharge keys, the condenser will discharge through the gal-vanometer and shunt, giving a deflection which should be noted. Withthe switch,
. American telephone practice . ~ - micro-farad. IO 5 Convenient connections for making capacity tests are shown inFig. 640, where G is the galvanometer, 5 the shunt, C the stand-ard condenser KK discharge keys, V the selecting switch and B, TESTING. 875 a battery of eight or ten cells. With the switch, V, at the left andboth discharge keys depressed, the current from the battery willflow into the condenser, thus charging it. Upon the sudden releaseof the discharge keys, the condenser will discharge through the gal-vanometer and shunt, giving a deflection which should be noted. Withthe switch, V, at the right, the cable may be charged or discharged inthe same manner, and the deflection produced by its discharge seven cells of battery is usually sufficient for making capacitytests on telephone cables. If a non-adjustable condenser only isavailable, one having a capacity of to microfarad is probably mostdesirable. For accurate work a subdivided condenser, having its » LEAD SHEA <-S_lSZ3-\.
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