MFGR 



i:o.i5 



20.000 



Ext. AC 



CENTER 



+ 0.31 

 — 0.05 

 10,000* 



105 -125V No Effect 



50-400 cps No Effect 

 2 VA 



0.08 



SPECIFICATIONS 



Accuracy (m/sec) 



Maximum Operating Pressure (psi) 



Power Supply 

 Source 

 Source Requirements 



Voltage (VAC) 



Frequency (cps) 



Power (VA) 



Signal Attenuation Sensitivity (3 db) 



Dimensions (inches 

 Maximum Length 

 Maximum Diameter 



Weight (pounds) 

 Less Housing 

 With Housing 



^Maximum available test pressure. 



ADDITIOHArfiirDATA' 



The frequency doubler unit has a mercury battery power supply of 



6. 75 volts. The unit becomes inoperative if this voltage falls below 



3. 8 volts. 



The errors induced by the effects of signal attenuation of up to 3 db 



and above are shown in graph A. 



The relationship between the sound velocity (C), and the "Sing- 



Around" frequency (F), as stated by the manufacturer is: C = 



. 205916F +.15 m/sec. This equation was observed to result in 



an error of +.31 to— .05 m/sec. However, if the relationship 



for this particular instrument is changed to: C = .206451F— 3.96 



m/sec, the error is within ±. 1 m/sec. See graph B. 



( 



0.07 



14-5/16 

 4 



7-1/2 

 16-1/2 



GRAPH A 



ERROR M/S 



GRAPH B 



-CENTERS ERROR BAND 



ERROR M/S 



AHENUATION 



'MFGRS ERROR BAND 



ALL TESTS WERE PERFORMED IN DISTILLED WATER AND ATMOSPHERIC PRESSURE 



