32 W. & L. E. GURLEY, TROY, NEW YORK 



SPECIAL INSTRUCTIONS 



Although the current meter is substantially made, and will 

 stand considerable hard usage, it needs careful handling and 

 attention to insure its proper working. In this connection the 

 following instructions should be carefully observed: 



1. Be sure that the set-screws are all tightened before 

 putting the meter in the water; otherwise, some of the parts 

 may be lost. 



2. Loosen the raising nut and see that the meter runs 

 freely before beginning a measurement. Spin the meter cups 

 occasionally during a measurement to see that they are running 

 freely, that is, that they will continue to move for a considerable 

 time at a slow velocity. 



3. See that the weights play freely on the stem, so as to 

 take the direction of the current and thus avoid an unnecessary 

 drag on the line. 



4. If any apparent inconsistency in the results of an 

 observation throws doubt on its accuracy, investigate the cause 

 at once. Grass may be wound around the cup shaft; the cups 

 may be tilted by tension on the contact wire; the channel may 

 be obstructed immediately above the meter; the meter may be 

 in a hole; or the cups may be bent so as to come in contact 

 with the yoke. 



5. After a measurement, it is absolutely necessary to pour 

 out any water that may have collected in the commutator box, 

 to clean and oil the bearing (in order to prevent rust) and to 

 inspect the pivot point. 



6. When the meter is not in use, the cups should never be 

 permitted to ride on the pivot point. 



7. Always see that the lock-nut on the pivot-point is 

 screwed firmly against the frame nut, so that it will stay in 

 place and carry the cups properly. 



8. Never use a dulled pivot. Always keep several extra 

 pivots on hand. 



9. In measuring low velocities, be sure that the meter is 

 in a horizontal position. If it has a tendency to tip, the balance 



