- 29 -
299-328nm -> 1 * power(0.094 * (298-nm))
329-400nm -> 1 * power(0.015 * (139-nm))
A "UVdata.log" file allows users to quickly save monitor
display results for later viewing or printing.
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Irradiance Calibration
//////////////////////
This application allows users to perform irradiance calibrations
in the field. It requires a calibrated source lamp from 300 to
1100nm or from 300 to 800nm. The calibration data for this
lamp needs to be in text file format with the wavelength and
associated watt value on each line, in 5nm increments.
You will be prompted to take a dark and then take a reading
using the calibrated lamp placed at a specified distance.
Next the Irradiance Calibration Data is read from the file
that you have specified (such as text file NIST.icd).
Bing bada boom - new irradiance cal files files are generated
(SW1.icf - for channel 1). WARNING: existing file(s) will be
overwritten, so take care to save these BEFORE running.
For users who don't have a valid irradiance calibration,
an example irrad cal data (text file) "NIST.icd" is provided.
This file can be used to simulate an irradiance calibration
and produce the required system calibration files needed for
selecting the Irradiance view mode. For this you may use any
white light source that will produce a "bell shape" curve.
WARNING: existing "SW*.icf" irradiance cal file(s) will be
overwritten, so take care to save these if you want to
preserve a previous "real" irradiance calibration.
REMEMBER THIS IS NOT A VALID METHOD AND IS SUPPLIED FOR
DEMONSTRATION ONLY.
StellarNet provides an irradiance calibration service using
an NIST calibration souce lamp (300-1100nm). Like most
instruments, it is good practice to re-calibrate the
spectroradiometer at least every 6 months.
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