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L&R LAND GRAVITY METER, MODEL G, S/N: G-936

Model G Instruction Manual

Manual revisions:

• 2002 version: LaCoste & Romberg: Instruction Manual, Model G & D Gravity Meter
  Each page is labelled with month and year, instead of a document revision number that applies to whole document.
  Also local copy
• 1989 version: LaCoste & Romberg: Instruction Manual, Model G & D Gravity Meter
  Only for reference - don't use.
  Also local copy

Operator Panel

Calibration table, S/N: G-936 / Converting the counter reading to milliGals

Calibration table land gravimeter L&R S/N: G-936. Click to enlarge.

Testing the model G gravity meter

• Free Air Gradient: 3 μGal / cm

MISC

Hugh C. Pumphrey at University of Edinburgh, School of Geosciences -- Gravity section

• Gravity section
• L & R Model G condensed operating instructions, 4 pages
• Gravity Levelling -- YouTube

1 g.u. (Gravity Unit) = 1 μms-2. The c.g.s. unit of gravity, the milligal, is still used --- 10 g.u. = 1 mGal (or 1 g.u. = 100 μGal)

Source: https://www.geos.ed.ac.uk/~hcp/gravity/ --- "The red curve in the centre graph is the theoretical gravity tide, calculated using the venerable formulas of Longman (1959) .." --- Formulas for computing the tidal accelerations due to the moon and the sun -- by I. M. Longman -- Journal of Geophysical Research, Volume64, Issue 12, December 1959, PP: 2351-2355