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UA
Timed UX scan
UA performs an Extended UV scan in 0.5nm increments and stores the data to a
UVJJJYY.nnn file. This is a 'timed' routine in that it starts on the next half hour after the
command is given.
On execution of the command, the prism is rotated to the UV dome, FW#2 is moved to the 1
position, FW#1 is moved to the 3 position, the iris is opened, and the tracker is pointed at the
sun.
See also Appendix A, and the UX command.
UB
UV Summary for Schedules
Raw UV scan data is stored in a UVJJJYY.nnn data file. The UB scan instructs the program
to process and print the daily summary for UV measurements taken throughout the day.
Damaging Ultra-Violet values are calculated for each scan and written to a DUVJJJYY.nnn
(See Appendix A).
UF
Fast UVB scan
UF results in a UV scan being done in the ascending wavelength direction only.
The zenith prism is rotated to the UV dome, FW#2 is set to the 1 position, FW#1 is set to the
3 position, the iris is opened, and the tracker is pointed to the sun.
The UV spectrum is scanned in steps of 0.5nm, with and integration of 4 shutter cycles for
wavelengths less than 300nm, and an integration of 1 shutter cycle for wavelengths grater
than 300nm. All data is normalised to a 1 cycle observation and recorded in a UFJJJYY.nnn
data file. When scanning is complete, a calculation of the UVB/UVA McKinley - Diffey
weighted irradiance is computed and sent to the printer and written to the DUVJJJYY.nnn
data file (See Appendix A).
UL
UV Lamp Scan
UL is a test command that results in a UV scan being performed with a Lamp (rather than the
sky) being the source of radiation.
The zenith prism is rotated to the UV dome, FW#2 is set to the 1 position, FW#1 is set to the
3 position, the iris is opened, and the tracker is rotated to the sun. The operator is asked for
lamp number, and lamp-diffuser separation, and the radiation intensity is measured in 1.5nm
increments over the UVB range.
Data is stored in a ULJJJYY.nnn file.
See also Appendix A.
UV
UV(B) Observation
UV results in the irradiance over the "B" region of the spectrum to be measured.
The zenith prism is rotated to the UV dome, FW#2 is set to the 1 position, FW#1 is set to the
3 position, the iris is opened, and the tracker is pointed toward the sun. The UV spectrum is
then scanned in steps of 0.5nm from 290nm to 325nm, and then back to 290 nm.
The data is appended to a UVJJJYY.nnn data file.
When scanning is complete, a calculation of the UVB/UVA McKinley- Diffey weighted
irradiance is computed, sent to the printer and to the monitor screen, and appended to the
DUVJJJYY.nnn data file. A correction is made to the Diffey action spectrum to include the
effects of the UVA region 325-400nm).
UVSUM UV Data Summary
This command initiates activity which processes and prints the daily summary of all UV
measurements made during that day. DUV values are also calculated for each
measurement and data is appended to the UVOAVG.nnn file.
See also Appendix A.
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MKIV OPERATOR'S MANUAL
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