TABLE 9.7 ENVIRONMENTAL MEASUREMENTS [FROM REF.(16)] 



Item 



Reading 



Freq 



Instrument 



Operation 



Power 

 Watts 



Oxygen 



Carbon Dioxide 

 Pressure 

 Temperature 



Internal 



External 

 Relative Humidity 

 Trace Contaminants 



"Metabolic 



"Other 

 Oxygen 

 Nitrogen 

 Carbon Dioxide 

 Carbon Monoxide 

 Methane 



Hydrogen Sulfide 

 Hydrogen 



Percent 

 Percent 

 Atmosphere 



"Fahrenheit 

 "Centigrade 

 Percent 



*PPM 

 *PPM 



»PPM 



2 hrs Teledyne Oi Sensor 



4 hrs Fyrite CO2 Analyzer 



4 hrs Pressure Gage 



4 hrs AbeonGage 



4 hrs Trub, Tauber, Cie Gage 



4 hrs AbeonGage 



24 hrs Drager Gas Detector Tubes 



1 wk Drager Gas Detector Tubes 



72 hrs 



UNICOPGCSeries/O Gas Chromatograph 



Manual 

 Manual 



Manual 



200(1 hr) 



•Parts per million 



peratures during the mission were shown in 

 Figure 9.9, and the effectiveness of the tem- 

 perature control method has been discussed. 



Humidity Control 



Humidity control was accomplished pas- 

 sively by allowing moisture to condense on 

 the bare sections of the hull's interior. As the 

 moisture was condensed on the hull it ran 

 into a catch trough which carried it into the 

 waste water storage tank. A small dehumidi- 

 fier was available but was not used. A 3,600- 

 pound supply of silica gel in 5-pound bags 



served to absorb moisture. The results of this 

 method were also discussed and graphed on 

 Figure 9.9. 



Atmospheric Pressure 



Under normal operating conditions, the in- 

 ternal pressure of BEN FRANKLIN varied 

 from a low of 13.5 psia to a high of 16 psia. 

 These changes can be expected when the sea 

 level temperature varies greatly from vehi- 

 cle interior temperature. Slight pressure 

 changes of 10 to 25 mmHg can be incurred by 

 normal variations in Oj CO2, and HjO partial 



445 



