ItKLAV MKAsrUI.NC; K( M 1 I'M KN'T 



-TEST RELAY 



Ivnamic fluxmeter. 



development and decay of the field than was previously thought to be 

 the case. 



The Measurement of Ttme — Eleclrical Effects 



The actual functioning time of the relay is one of the more important 

 behavior characteristics which must be tabulated for the particular 

 design. Its measurement can be quite simple or quite complex depending 

 on the problem invoked. 



One of the simpler time measurements is that permitted by means of 

 the arrangement shown in Fig. 10. This particular eciuipment is composed 

 of a control circuit for studying the various relay timing conditions, and 

 a Berkeley Timer made by the Berkeley Instrument Company. The 

 timer is provided with electronic controls which cause it to start count- 

 ing cycles from a standard f requeue}' when given an electrical impulse 

 and to stop counting upon receiving a second impulse. The circuit may 

 be arranged to give the first impulse when the relay winding is connected 

 or disconnected and the second impulse when the contacts or other 



