CURRENT METERS 31 



CARE OF THE CURRENT METER 



TO TAKE THE METER APART 



\\li.-n IAN.- ill-- mrtn .i|..iii. ramm ill-- i. ni vaaei .ud ii- 



hanpT Mrm : thru I.M.^-H thr lefcaemi I" ill'' - "i't. i. I 'li.tnil.'-r. 

 pull thr rhamlx i nut by a slight twisting MM.M..II. Care 

 be taken t<> l.-t tin , up* be free to turn, so that the worm 

 gear on thr upper end of thr *h.tlt ran disengage from the teeth 

 ..! the contact wheel. In handling the contact chamber, it i- 

 well to take off the cap, so that the gear-wheel can be seen during 

 the operation. The pi\<>t |<nit can then IN* taken out and the 

 a--d ly loosening the upper part of the shaft with a 

 \\rnu h. Tin- wrenrh i* so designed that it can be 

 used for loosening all parts of the m<! 



In putting thr mrtrr together, first attach the cups to the 

 < -up -lull, lii .I..INL: tin-, the upper part of the shaft should be 

 in-ertrd through the upper hole of the yoke before it is screwed 

 to the lower part. Can- mu-i le taken to place the cups so that 

 thr\ \\ill move counter-clockwise. After the cups have been 

 fastened to the shaft, insert the pivot point and clamp it in 



pl.ier. .111(1 thru ill-erl tll' eontart rhamhrr. Ill I'-pLf niL! thr 



"Mtact chamlier. the cups should be left free to move on the 

 pivot point. Before inserting the frame nut, the pivot point 

 should be adjusted and firmK secured with the lock-nut. The 

 adjustment should allow a slight vertiral nmtinn <>i thr cups, 



TO CHANCE CONTACT CHAMBERS 



1. Loosen the set screw to the contact chamber in yoke. 



2. Carefully lift the contaet eharnher from the yoke. 



3. Careful l\ un-eivw either the worm, or eccentrie. from 

 the -haft and screw in the other, which will be found in the 



-mall round tin box. 



4. Slide into the yoke the other chamlicr. \\hirh is in a 

 block in one corner of the meter box, and tighten the set screw. 



