168 



ELECTRICAL MEASUREMENTS 



M 



-N 



^ Oiofl JT 



HI' 





_ 

 1 



O 40 O, 



o 



Therm* 





* 



3 



FIG. 90. Wheatstone bridge top with plug connections. 



0.1 0.2 0.3 0.4 1 P 2 3 4 10 20 



00 4000 3000 2000 1000 400 300 



FIG. 91. Wheatstone bridge with internal connections and reversible 



ratio arms. 



