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KING ABDULAZIZ UNIVERSITY Purchasing & Cont. Dept.

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, Tri-axial borehole velocity-meter package to 1 ~.^{m depth.}~{ .• VImls differential output in the frequency band \ r , sec to ^{0 ,}Hz. stainless steel. permanently water-tight up to \ c , 'PSI, integrated with Low Noise. downhole tri-axial accelerometer DC-' •. Hz, '. 0g full scale. ' . V Differential, integrated with '-channel downhole, _~{-bit digitizer, {, Vpp (differential) input analogue channels, capable of , • , 'Hz sampling rate at _~\ -bit. Fully compatible (logic and control) with downhole sensors and have high-speed, hot-swappable recording medium of at least £ • GB storage capacity and integrated GPS timing and positioning system. The entire package should operate on H-HVDC out of HVDC/" ._n·VAC; with anti-surge, anti-ripple, anti-polarity reversal protection. The entire package should be permaoently water-tight up to \ c , 'PSI and equipped with borehole orientation mechanism, strain-relief mechanism, electro-mechanical hole-lock system, and a surface control unit for orientation locking/unlocking, calibration from the surface.

Including all cables and connectors and detailed documentation including installation, calibration, operation. grounding, and electrical isolation procedures. Includes software for sensor calibration and data acquisition aod analysis compatible with Microsoft Windes xp and higher and Linux.

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