General Information

Serial #

N/A

Part Number

1

Total Parts

6

AKA

N/A

Patents

N/A

General Description

Metal and synthetic instrument, paper in reel.

Dimensions

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

Length

N/A

Width

N/A

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Computing Technology

Category

Analog computing devices

Sub-Category

N/A

Manufacturer

AKA

Philips

Country

Holland

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

Gyrostabilized gravity measuring system KSS 30 designed for marine seagravimetrical applications.

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

White print on face of recorder reads: "PM 8252 dual-pen recorder" and "MADE IN HOLLAND/ PHILIPS"/ White handwritten label reads: "CHANNEL 1 BLUE"/ and " CHANNEL 2 RED"/ Red and white label on side mount reads: "BEDFORD INSTITUTE/ OF OCEANOGRAPHY/ DARTMOUTH N.S.". Mfr's plate on back of instrument reads "TYPE PM 8252[/]02/ NC 9443 082 52 021/ No DJ 02 25 70/ 220-245V/ 25VA/ 50-60 Hz". Case was disposed of, however, the markings on the case read "CHART/ RECORDER" in black marker. Silver label with black print, right corner of lid reads: "Old Fashion Woodworkers Ltd./ P.O. Box 2992 D.E.P.S./ Dartmouth, N.S. B2W 4Y3/ (902) 443-5104". Black print with marker on side of case reads: "P.S. 30".

Missing

Appears complete

Finish

Instrument is made of a combination of metal and syntehtic. It is dark grey and blue in colour with white mfr's print. There are also two paper labels affixed to the front of the instrument with handwritten print. There is lined computer paper in the recorder feed. It has four dark grey knobs and three dark grey toggles. Back of intrument has a silver metal panel with various input and output connectors.

Decoration

N/A