Traceability of luminous intensity and luminous flux using transfer standard lamps

Project Description

Both, the luminous intensity and the luminous flux standard lamps were calibrated at the PTB in January 2013 and need now to calibrate.

Branch 1      Photometry
Service         1.1 Luminous intensity
Subservice    1.1.1 Tungsten Lamp correlated colour temperature

Branch 2      Photometry
Service         1.3 Luminous Flux
Subservice    1.3.1 Tungsten Lamp correlated colour temperature

Mazda Standard Lamps 407, 408, 410, 412 are calibrated at PTB


Progress Report 2019-07-05

Traceability for luminous intensity and luminous flux for Austrian Measurement Standard.
The luminous intensity standard lamps (
OSRAM WI41/G, lamp numbers: 715, 716, 718, 719) were calibrated at PTB on March 31st, 2017. Next calibration is due March 2021.
The l
uminous flux standard lamps (Mazda, lamp numbers: 406, 407) were calibrated at CMI on December 17th, 2017. Next calibration is due December 2022.


Progress Report 2018-01-25

Luminous Intensity were calibrated on March 2017 at PTB, Measurements in process at BEV Luminous Flux since April 2017 at PTB for Calibration.

The project has been moved from comparison to traceability. There has been no calibration since 2013. The status report is the same as last time.


Progress Report 2014-03-21

Both, the luminous intensity and the luminous flux standard lamps were calibrated at the PTB in January 2013. The next calibration will be 2017.


Progress Report 2013-02-14

Both, the luminous intensity and the luminous flux standard lamps were calibrated at the PTB.


Progress Report 2013-02-15

There were no activities in the period from 02/2011 to 02/2012.


Progress Report 2013-02-14
Both, the luminous intensity and the luminous flux using transfer standard lamps.


Progress Report 2011-03-04

No new calibrations.

The activities in photometry and radiometry at the BIPM were closed down in 2003. Therefore, the BEV now consigns the PTB to accomplish the calibration of incandescent transfer standard lamps to maintain traceability of the units of luminous intensity and luminous flux. At the PTB the realization of the candela is based on radiant power measurements transferred by a photometer (Metrologia 1997, 34, 115-124). The lumen, the unit of luminous flux, is traced back to the candela by employment of a goniophotometer (Metrologia, 1996, 32, 685-688). Thus, the luminous intensity and the luminous flux transfer standard lamps of the BEV will be calibrated on a regular time schedule at the PTB.

Subjects
Photometry and Radiometry (PR)
Coordinating Institute
BEV (Austria)