4. 2. 2 Pressure Transducers 



a. R-P curve: factory calibration using dead weight 

 tester, August 1967, Repeat at MIT/ XL in hydraulic 

 pressure chamber, September 1967 and in air 

 pressure chamber June 1968. Repeat at SRI during 

 hydrostatic tank test to 1300 PSl, 6, 7 October 1967, 

 and to 1200 PSI, 29, 30 July 1968. 



b. Time constant: not checked, factory data accepted. 



c. Resolution check: continuous resistance record 

 during bleed off in air pressure chamber, at MIT/ 

 IL, June 1968. 



d. Gross check during deployment to 600 meters, 24 

 November 1967: agreement with Station depth 

 determined by geometrical construction. 



4, 2, 3 Tensiometer 



a. R- Tension curve: calibration up to 12, 000 lbs 

 tension on MIT Instron Test Machine, September 



1967; repeat June 1968, 



b. R- Temperature curve: calibration over tempera- 

 ture range in oven and during cool- down in ice 

 water bath at MIT/IL, September 1967; repeat 



in ice bath and room temperature, June 1968, 



c. R- Press curve: calibration during SRI hydro- 

 static tank test to 1300 PSI, 6, 7 October 1967, 

 and to 1200 PSI, 29, 30 July 1968. 



d. Time constant: continuous resistance record 

 after step function tension load, July 1968. 



e. Gross check during deployment, 24 November 1967: 

 indicated tension agreed with prior estimates for 

 geometry attained. 



4. 3 System Checkout 



The Data Acquistion System and Signal Cable /Sensor Array 

 were married for the first time at Bermuda. Before this mar- 

 riage the DAS had undergone extensive checkout at MIT/IL in- 

 cluding an end-to- end functional demonstration that sets of 

 known resistances can be sampled, precisely measured, and 

 properly formatted on magnetic tape. The IBM 360/75 Assembly 

 Language and Fortran programs for reading the tape and filing 

 the data for analysis programs were verified and ready for use 



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