Abstract
A test system for seafloor / borehole sensor, OOVEE (Oil Operated Virtual Environment Equipment), was equipped for long term sensor stability evaluation. OOVEE consists of two +/- 10 mK stability isothermo baths, a +/- 3 kPa stability (short term typical value) deadweight tester, and 6.6 L pressure chamber. The range of temperature is -2 to 175 degree Celcius, and of pressure 1 to 100 MPa. Pressure and temperature in the chamber were kept at 60 +/- 0.05 MPa and 2 +/- 0.008 degree Celcius for 22 hours evaluation. Variation of pressure came from acceleration of piston rotation, and more stable pressure can be supplyed within 2 hours. Temperature homogeniety of the isothermo bath was +/- 15 mK beneath 10 cm depth.
