CG-3 Description & Test Results - Scintrex

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Figure 7. Magnetic Field SensitivityIn summary: the temperature sensitivity of the instrument is less than 0.001 mGal/°C, pressuresensitivity is 0.03 mGal/atm and maximum magnetic field sensitivity 0.00013 mGal/Gauss.Results of Field TestsIn this section the results of representative field tests are presented. Repeatability, linearity and the effectof transport on long term drift rate are discussed.Results of a field test performed on a test site located 65 km from the Scintrex plant are shown in figure8. Two loops of approximately 20 km were made around the test range with the instrument beingtransported by car over badly corrugated unsealed roads. The largest deviation of a reading from thestation mean was less than 0.02 mGal and the standard deviation of the difference between individualreadings and station means is 0.007 mGal.12
Figure 8. Repeatability – transport on sealed and usealed roadsFigure 9 summarizes the results of two test runs along the OrangevilleOrillia calibration line north ofToronto. This 140 km/120 mGal line was established and is maintained by the Geological Survey ofCanada using Lacoste and Romberg models G and D meters. The linearity for both runs is better than0.015% with the largest difference between repeat readings at any station being approximately .02mGal.Figure 9. Test runs on the OrangevilleOrillia Calibration Line13
Page 1 and 2: SCINTREXThe New Scintrex CG3 Auto
Page 3 and 4: Sensor DesignThe sensing element of
Page 5 and 6: Figure 2. Integrated HousingThe uni
Page 7 and 8: Figure 3. Atypical gravity meter li
Page 9 and 10: In cycling mode the corrected gravi
Page 11: In the low temperature test the ins
Page 15: ConclusionThe CG3 represents seve

CG-3 Description & Test Results - Scintrex

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