General Information

Serial #

N/A

Part Number

1

Total Parts

7

AKA

N/A

Patents

N/A

General Description

Primarily metal with synthetic knobs and cable.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

59.0 cm

Width

22.5 cm

Height

31.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Electronics

Sub-Category

N/A

Manufacturer

AKA

Tektronix

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

Taken from Acquisition proposal: Quoting from the NRCan web site: http://www.geod.nrcan.gc.ca/aboutus/gravity/grvinsts_e.php The Geodetic Survey Division owns and operates two absolute gravity instruments, JILA-2, and the A-10. It also collaborates with the GSC in the operation of a second instrument, FG5-106. The JILA-2 was acquired in November, 1985 and FG5-106 in April 1993. The A-10 instrument was acquired in 2000. The JILA-2 has been upgraded four times since it's acquisition with new computer control, new lasers, GPS clock and ancillary equipment. These upgrades were necessary in order to make it more efficient, field worthy, lighter and easier to use. Instrument modifications and tests are essential for Canada to remain at the leading edge in gravimetry. Because of their high accuracy of a few parts per billion, the instruments are used to establish, strengthen and expand the Canadian Gravity Standardization Net. Large calibration ranges are also established for the purpose of calibrating the complement of relative gravimeters owned by the Gravity and Geodetic Section. Smaller calibration ranges are maintained for industry so that companies can evaluate and compare their instruments against the established standard. Examples are the small calibration ranges between Ottawa and Gananoque and between Orangeville and Collingwood. The absolute gravimeters participate on a regular basis in international campaigns and comparisons in order to maintain the high standards of accuracy required of these instruments. The two most recent comparisons were done at the Bureau International des Poids et Mesures in Sevres, France, in 2001, and at Boulder, Colorado, USA, in 1995. The BIPM comparisons for instance occur every four years. Comparisons at the Canadian Absolute Gravity Site (CAGS) have been carried out every year with some exceptions since 1988 with the National Oceanic and Atmospheric Administration (NOAA) under an MOU.

Function

Unknown

Technical

These items have all played a role in Canada's position at the leading edge of gravimetry. Obviously the leading edge of 30 years ago is no longer the leading edge so NRCan has upgraded its instruments on a regular basis.

Area Notes

Unknown

Details

Markings

Print upper right corner of oscilloscope reads: "7613 OSCILLOSCOPE"/ Print lower right corner reads: "TEKTRONIX INC."/ Orange label with black print reads: "GSC[/] CGC/ 14140"/ Second instrument, far left, reads: "TEKTRONIX [registered]/ 7A18/ DUAL TRACE AMPLIFIER"/ Orange label with black print reads: "GSC[/] CGC/ 14129"/ Third instrument, centre position, reads: "TEKTRONIX [registered]/ 7A22/ DIFFERENTIAL AMPLIFIER"/ Orange label with black print reads: "GSC[/] CGC/ 14125"/ Fourth instrument, far right, reads: "TEKTRONIX [registered]/ 7B53A/ DUAL TIME BASE"/ Print upper right corner: "MAIN TRIGGERING/ AMPLIFIER"/ Orange label with black print reads: "GSC[/] CGC/ 14131"/ Back of mainframe has settings for the instruments. Black and silver label top back of mainframe reads: "PROPRIETE DE/ GR00167/ ENERGY, MINES & RESOURCES/ EARTH PHYSICS BRANCH/ ENERGIE, MINES ET RESSOURCES/ DIRECTION DE LA PHYSIQUE DU GLOBE"/ Other label top front of mainframe: "NRCAN/ RNCAN/ [Canada flag logo]/ [bar code]/ A051020"

Missing

N/A

Finish

Grey, green and blue metal panel front with black print. All four instruments are primarily metal with synthetic knobs. All four instruments are housed in a mainframe. Mainframe is made of metal and painted turquoise. Synthetic handle on top. There is one grey cable attached to mainframe.

Decoration

N/A