60 ELECTRICAL AND ELECTRONIC SYSTEMS 



Power Usage Recorder 



A standard commercial three-phase watthour meter shall be provided and installed in Sea- 

 lab and shall be connected on the load side of the transfer switches to record the total power 

 consumed. If more convenient and economical, a watthour meter may be installed on the sup- 

 ply side of each transfer switch. 



Equipment Usage Recorders 



Commercial, non-resettable, self-starting, synchronous, elapsed-time indicators shall be 

 installed for all equipment listed under Item 2, Equipment Usage. The indicators may be in- 

 stalled on the individual pieces of equipment or grouped at a convenient remote location. If 

 indicators are grouped, they shall be labeled with the name of the equipment to which connected. 

 The indicators shall register in hours and tenths of hours up to 9999.9. 



Interior Temperature Sensors 



The interior temperature of the Sealab at the locations specified in Item 3, Interior Tem- 

 perature, will be recorded on shore through the facilities of the Scripps benthic lab. San Fran- 

 cisco Naval Shipyard shall design and/or procure and install the necessary temperature sen- 

 sors, amplifiers, and interior wiring. The temperature range of each sensor shall be 65° F to 

 95°F. The benthic lab accepts an 0-7 vdc input with a preferred operating range of 1-6 vdc. 

 The amplifiers shall be designed to produce a degree/volt output that will be within this range. 

 The output cable from each sensor amplifier shall terminate in the terminal box located in the 

 vicinity of the instrumentation cable trunk. 



Equipment Temperature Sensors 



The interior temperature of the refrigerator and freezer compartment will be recorded on 

 shore through the facilities of the Scripps benthic lab. San Francisco shall design and/or pro- 

 cure and install the necessary temperature sensors, amplifiers, and interior wiring. The tem- 

 perature range of each sensor shall be approximately -10°F and +20°F of the designed temper- 

 ature of each compartment. The output of each amplifier shall be designed to produce a 

 degree/volt output that will be in the range of the benthic lab specified in the preceding para- 

 graph. The output cable of each amplifier shall terminate in the temperature terminal box. 



Interior Humidity Sensors 



The interior humidity of the Sealab at the locations specified in Item 5, Interior Humidity, 

 will be recorded on shore through the facilities of the Scripps benthic lab. San Francisco 

 Naval Shipyard shall design and/or procure and install the necessary humidity sensors, ampli- 

 fier, and interior wiring. The humidity range of each sensor shall be 50 to 100 percent relative 

 (50 to 90 percent satisfactory if the above range is not available). The amplifiers shall be de- 

 signed to produce a percent/volt output that will be in the benthic lab range. The cable from 

 each sensor amplifier shall terminate in same terminal box provided for the temperature 

 sensors. 



©2 Partial Pressure (PO2) Sensor 



The PO2 sensor is being furnished by NOTS. Two spare terminals in the terminal box 

 shall be provided to facilitate connecting equipment at the test site. 



Instrumentation Cable Trunk 



An eight to ten inch pipe shall be installed through the hull at approximately frame 44 on 

 the port side of the lab space to permit instrumentation cables to be brought in to the Sealab 



