200/ 245/ 275 TSF & TLF Standards
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Gooch and Housego offers 200-W, 75-W, and 45-W lamps as standards of total spectral radiant flux and total luminous flux. These lamps have tungsten coiled and coiled-coil filaments enclosed in a quartz envelope. The lamp standards can be obtained with total spectral radiant flux calibrations over the 250 nm to 1100 nm wavelength region. The total luminous flux is also provided for the spectral standards. OL 220, OL 275, and OL 245 NIST-Traceable Total Spectral Radiant Flux and Total Luminous Flux Standards PERFORMANCE SPECIFICATIONS OL 220 Total Spectral Radiant Flux (typical) @ 380 nm (W/nm) @ 650 nm (W/nm) @ 1100 nm (W/nm) Total Luminous Flux (typical) The total spectral radiant flux and total luminous flux standards issued by Gooch and Housego are based on the National Institute of Standards and Technology (NIST) Total Spectral Radiant Flux Standard Lamps for the wavelength range of 360 nm to 830 nm. Spectral values provided below 360 nm or above 830 nm are based on OL 275 Calibration NIST FEL 1000-watt Lamp Standard Standard of Spectral Irradiance. The NIST Scale has relative expanded uncertainty (k=2) of ±1.5% at 380 nm, 1.0% at 650 nm, and 0.47% in the infrared at 900 nm. Spectral Transfer Uncertainty * 380 nm to 780 nm 790 nm to 1100 nm Uncertainty * -Total Luminous Flux Long Term Photometric Stability ** Wattage Operating Current (amps DC) * Uncertainty is relative to NIST Scale at k=2 ** Value shown is for reference only, see Report of Calibration for applicable value CALIBRATION OPTIONS Total Spectral Flux Contact: orlandosales@goochandhousego.com Calibration of the Total Spectral Radiant Flux Standards over the wavelength range of 380 nm to 830 nm have an estimated transfer uncertainty (k=2) relative to the NIST Scale of ± 2%. The transfer uncertainty below 360 nm or above 830 nm is estimated to be ± 3% relative to the NIST Spectral Irradiance Scale Total Luminous Flux (only) Uncalibrated (seasoned) For color temperature calibrations in addition to any of the above calibrations, add the suffix “K" respectively to the appropriate model number. As part of our policy of continuous product improvement, we reserve the right to change specifications at any time Bulletin 7 / Rev 5-14 Page 1 of 2

OL 220, OL 275, OL 245 Total Spectral Radiant Flux and Total Luminous Flux Standards Method of Calibration Optional Accessories An OL 750 double monochromator-based spectroradiometric measurement system equipped with an integrating sphere designed for total spectral flux is used for the total spectral radiant flux measurements. Gooch and Housego offers several accessories to enable the user to realize the high accuracy assigned to its NISTtraceable standards. These accessories are designed to minimize errors due to current setting, alignment, and orientation. The total luminous flux value...