200/ 245/ 275 TSF & TLF Standards0 pages

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 Calibration
Standard

OL 220, OL 275, and OL 245
NIST-Traceable Total Spectral
Radiant Flux and Total Luminous
Flux Standards
PERFORMANCE SPECIFICATIONS
OL 220

OL 275

OL 245

1 x 10-2
1 x 10-1
1.2 x 10-1

1.4 x 10-3
2.5 x 10-2
Not
available

1 x 10-3
1.6 x 10-2
2.5 x 10-2

5200

1000

750

± 2%
± 3%
± 1%
≤ ± 0.06%
/ hr

± 2%
± 3%
± 1%
≤ ± 0.02%
/ hr

± 2%
± 3%
± 1%
< ± 0.06%
/ hr

200-W
6.500

75-W
2.600 **

45-W
6.500

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

OL 220

OL 275

OL 245

OL 220-TSF-E

250 – 800 nm

OL 275-TSF-E

OL 245-TSF-E

OL 245 Calibration
Standard

Contact: orlandosales@goochandhousego.com

OL 220-TSF-F

OL 275-TSF-F

OL 245-TSF-F

250 – 1100 nm

OL 220-TSF-M

OL 275-TSF-M

OL 245-TSF-M

300 – 780 nm

OL 220-TSF-R

OL 275-TSF-R

OL 245-TSF-R

300 – 1100 nm

OL 220-TSF-T

OL 275-TSF-T

OL 245-TSF-T

380 – 780nm

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

350 - 1100 nm

OL 220-TSF-V

OL 275-TSF-V

OL 245-TSF-V

OL 220-TLF

OL 275-TLF

OL 245-TLF

OL 220U

OL 275U

OL 245U

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.

OPTIONAL ACCESSORIES
OL 220
OL 275

39” & 76” dia spheres use ............................................ OL57-T (OL 220)
OL E10-3900 (OL 275)
NOTE: In order to ensure consistent and reliable results, Gooch & Housego (Orlando)
standards should only be used with current sources that possess a ramp current feature.

www.GHinstruments.com

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 245

Precision Current Source ............ OL 410 ............. OL 410 ............. OL 410
Lamp Holders
18” dia spheres use ..................................................... OL 57-S (OL 245)
OL E10-1800 (OL 275)