Renseignements généraux

Nº de série

7318

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

metal casing, base, stand, controls, parts/ glass optics/ synthetic label cover/ paper label

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

26,5 cm

Largeur

13,1 cm

Hauteur

33,5 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Météorologie

Catégorie

Mesure d'intensité et de durée de l'insolation

Sous-catégorie

S/O

Fabricant

Ou

Gunther Tegetmeyer

Pays

Allemagne

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Inconnu

Période

This instrument was apparently in use for 50 years (Ref. 4).

Canada

A radiation measuring instrument of a type used by the Meteorological Service of Canada to gather radiation data, at a solar radiation research site. Part of a large collection of meteorological instruments acquired from the Meteorological Service of Canada (previously Atmospheric Environment Service) by the CSTM since 1967. MSC is the government agency responsible for collecting and disseminating meteorological data and forecasts in Canada. It was founded in 1871 in Toronto where it is still headquartered. The MSC was originally on the University of Toronto downtown campus but moved to Downsview in 1971 on land owned by UofT. The headquarters houses laboratories, research facilities and calibration and instrument maintenance facilities (now largely contracted out).

Fonction

An instrument used to measure the radiation from the direct beam of the sun; direct beam RF8 (Radiation Field 8) measurements are made at solar radiation research sites.

Technique

A German-made bimetal actinometer. This microscope like instrument was used to measure the radiation from the direct beam of the sun. Direct beam (RF8) measurements of the sun which have a 5° degree beam width are made at research sites only. Presently a tracking pyrheliometer is used for this measurement (Ref. 1). The Department of Transport, Meteorological Branch label indicates that this instrument was made before 1971 when that dept. became EC AES. From the English precis of the German instructions entitled ‘Bimetal Actinometer according to Buttner': ‘The bimetal actinometer is principally used for measuring the radiation of the sun, the rays being conducted through a light tunnel onto the lamella. The deformation of this lamella is ascertained through a microscope from a tracer thread. The advantage of the Buttner type actinometer consists in the arrangement of plates of the same characteristics and connected in opposition, thus eliminating the disturbing effect of the temperature of the instrument (migration of the zero point, the lamella acting as a thermometer). The compensated system of lamellas is embodied in a metal housing including a thermometer to be read from the outside. A metal case surrounds the internal element and carries on the top plate the light tunnel, a filter case with 7 adjustable filters and the hinged cover as well as the lighting aperture for the microscope with device for interposing a a coloured glass and a finder. After the image of the sun has been adjusted by the finder, the microscope will show a small projection of the sun image which while the tracer thread is directed upon the mark of the ground glass plate of the field of view in the microscope, ensures the sighting of the sun and thus the constant direction of the rays of the sun into the instrument during measurement.' (Ref. 2)

Notes sur la région

Inconnu

Détails

Marques

plates on front and side reads 'Gunther & Tegetmeyer/ BRAUNSCHWEIG No. 7318'/ label on side reads 'CANADA/ DEPARTMENT OF TRANSPORT/ METEOROLOGICAL/ BRANCH'/ typed paper label reads '1 Quarzglas 3 RG 2/ 2 O G 1 4 RG 8/ 5 - 8 frei'/white AES label with black lettering reading '6650-0008 7318 [bar code]/ *5257-00410* ARQX/ MICROSCOPE, GUNTHER'

Manque

unknown

Fini

white instrument casing & stand parts/ brushed & black painted parts/ colourless transparent glass/ black crinkle finished base/ glossy black painted post/ white synthetic/ white? paper with colourless transparent cover

Décoration

S/O