INPUT FROM SENSOR 



LINE- 

 CROSSING 

 DETECTOR 



INPUT 

 GATE 



BINARY 

 COUNTER 



INPUT 

 GATE 



CLOCK 



PULSE 



GENERATOR 



BINARY 

 COUNTER- 

 MEMORY 



"'"'""" 



RESET 



PULSE 



GENERATOR 



OUTPUT TO 

 RECORDER 



TIMING AND 



SEQUENCE 



CONTROL 



Figure 11. Block Diagram of Period Counter for Use with V I brat I ng-Wi re 

 Pressure Sensor. 



17 



