Appendix Cuv Processing; Lamp Data Analysis; Brewer Response Files - Kipp & Zonen Brewer Mk III Operator's Manual

APPENDIX C

LAMP DATA ANALYSIS

Brewer Response Files

RESIII.EXE is used to determine the responsivity of a Brewer with the aid of data from a calibrated
external tungsten-halogen lamp. Requirements for program execution are a LAMP_LLL.IRX file for
each lamp used, and the XL or UL file, XLJJJYY.nnn. The output of this program is a new response
file. It is recommended that the new response files be named with the format UVRJJJYY.nnn. This
file should be compared to previous response files to determine if there has been a possible
change in the performance of either Brewer electronics or optics. The response file is similar to the
SL test results for keeping track of instrument stability. The response file is also accessed by the
UV and UVSUM routines and AB_UVDAT to calculate a damaging ultra-violet (DUV) amount for
each scan and for the day. The most representative response file should be kept in the Brewer
data directory C:\BDATA\NNN.
To use RESIII.EXE, it should reside in a directory containing the XL scans and the Lamp irradiance
files.
1. The program is launched by typing "RESIII"
2. At the prompt, the instrument number is entered.
3. All lamp files and XL scans matching that instrument are read into a list. The list shows all
scans - any scans that do not have a lamp file available are marked with a (!)
4. The scans to be processed are selected by ranges and lists of numbers (ie. "2,5-7,12",
results in scans 2,5,6,7, and 12 to be processed. Scans that have no lamp files are skipped.
5. If a new response file is desired, the filename of the new file is entered in the form form
UVRJJJYY.NNN
6. The new response file is placed in the C:\BDATA\NNN directory, and replaces the old RES
file in OP_ST.NNN.
The response file calculated each time will be affected by temperature (lower response with higher
temperatures), lamp positioning, and power supply stability. Changes from accepted response
values of more than 5% should prompt investigation into the discrepancy. Statistics from the
response calculations should give percent standard deviations of <1.5% to be considered
acceptable.
UV PROCESSING
MKIII OPERATOR'S MANUAL
APPENDIX C UV PROCESSING
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