LumaSense Technologies M340 - Manual (Page 24)

M340 Manual Appendix B: Calibration Methods 24
Emissivity
When measurements are required at wavelengths other than the one used for factory
radiometric calibration, or if the calibration was done thermometrically (see above), the graph
below provides emissivity vs. wavelength for this model. Integrating over the wavelength region
of interest will provide the average emissivity for your measurement. If the blackbody was
calibrated radiometrically, the apparent emissivity at 8-14um was normalized to 1.0. If the
blackbody was calibrated thermometrically, the target emissivity vs. wavelength can be read
directly from the graph.
Mikron Infrablack 4 - Spectral Emissivity Test
performed by NIST: March 2005
For convenience, the tables below show the expected radiance output vs. temperature (setpoint)
for two popular wavelength regions (emissivity at 2 decimal places). These tables assume the
ambient and background are at 23 °C and apply ONLY if your blackbody was calibrated
thermometrically.