Tests were made of the effect of several variables on the performance of the Eppley pyrheliometer. The tests showed: (1) How the output increased with. Find out information about Eppley pyrheliometer. A pyrheliometer of the thermoelectric type; radiation is allowed to fall on two concentric silver rings, the outer. An Eppley Normal Incident Pyrheliometer (NIP) is calibrated against an Eppley Hickey-Frieden Absolute. Cavity Radiometer under a variety of environmental.
|Published (Last):||10 December 2008|
|PDF File Size:||11.43 Mb|
|ePub File Size:||13.47 Mb|
|Price:||Free* [*Free Regsitration Required]|
Eppley Pyrheliometer Serial No. Attachments are provided so that measurements of direct and diffuse solar radiation may be obtained.
You can improve Exodictionary by cleaning up the page markup and verifying pjrheliometer the definition is correct and then removing this tag. This instrument has been adopted by the U. Info as printed on the plate: Weather Bureau for station use. Radiation is allowed to fall epplley two concentric silver rings, the outer covered with magnesium oxide and the inner covered with lampblack.
The other ring is coated with lampblack; the hot junctions are similarly attached to its undersurface. Personal tools Log in.
Canada Department of Transport Meteorological Branch. Eppley is still making radiation measuring equipment, although they no longer look like this one: The overall response of the instrument to solar radiation is an e. This autostub has not yet had its initial copyediting proof and may contain significant formatting and even factual errors. You can improve Exodictionary by removing inappropriate categories and then removing this tag.
Retrieved from ” http: The derived value of the constant for the instrument is 6. The pyrheliometwr are platinum-rhodium 90 – 10 percent purheliometer gold palladium 60 – 40 percent and the thermopile comprises several thermocouples. The magnesium oxide has a high reflectivity for radiation in the solar wavelengths and is a good absorber and emitter in the longer wavelenghts, making for a low equilibrium temperature on exposure to solar radiation. The bulb contains dry air.
Eppley pyrheliometer | instrument |
Le contenu de ce site est sous copyleft The content of this site is under copyleft Der Inhalt dieser Website steht unter Copyleft. Canada Department of Transport Meteorological Branch Eppley is still making radiation measuring equipment, although they no longer look like this one: This definition article has been automatically generated.
One ring is coated with magnesium oxide; to the underside of this the electrically insulated cold junctions are attached in close thermal contact. The similarity of the receivers with regard to absorption of long wave radiation tends to minimize the effect of any long wave radiation as pyrheliometter the glass cover which pyrueliometer fall on the receivers.
The Eppley pyrheliometer consists of a thermopile mounted under receivers inside a clear glass spherical bulb about 3 inches in epplley.
Normal Incidence Pyrheliometer
A system of thermocouples thermopile is used to measure the temperature difference between the rings. You can help ExoDictionary by expanding, updating, or correcting it. This autostub has not yet had its initial categorization proof and may be categorized pyrgeliometer. Interwiki Lunarpedia Marspedia Exoplatz Scientifiction. Lampblack has good absorption in both wavelength intervals, and due pyrgeliometer its greater absorption of the solar wavelengths its equilibrium temperature on exposure to solar radiation is higher than that of the magnesium oxide.
The receivers are concentric flat metal rings exposed in a common plane; the rings are thermally insulated from each other and from the mounting.