11 



TABLE 2 

 Specifications for Schaevitz Accelerometers 



Acceler- 

 ometer 



Designa- 

 tion by 

 Manufac- 

 turer 



Primary 



Secondary 



Sensitivity - Open 

 Circuit mv. output 

 per volt input at 

 60-cycle a-c 



for 0.001 inch core 

 displacement 



Resist- 

 ance per 

 Coil 



ohms 



Numb er 

 of Turns 

 per Coil 



No. 36 

 HF Wire 



Resistance 

 per Coil 



ohms 



Number 

 of Turns 

 per Coil 



No. 40 

 HS Wire 



Heave 



Roll 



Pitch 



DA-1 

 DA -2 

 DA -2 



15 

 15 

 15 



250 

 250 

 250 



400 

 400 

 400 



2500 

 2500 



2500 



1 

 1 



1 



Accelerometer Transformer 

 Secondary Primary 



-V..Q.P.P./-I 



Adjust Range 



T 



nJ&iVxft&Lr- 



To Amplifier 

 6v a-c 



To Amplifier 

 Amplifier ln P ut 



Ground 



u 



Range Selector 

 Switch 



Secondary Primary 



Balance Transformer 



Channel I 

 Linear Accelerometer 



Accelerometer Transformer 

 Secondary Primary 



-vJLPJLn 



To Amplif 

 I , 6v a-c 



Amplifier 

 Ground 



To Amplifier 

 Input 



30a< <60n. 



Range Selector 

 Switch 



Secondary Primary 



Balonce Transformer 



Channels 2,3,4,5 

 Angular Accelerometers 



Figure 8 - Schematic Diagrams of Null Balance Circuits 



