Ocean Optics Jaz Absolute Irradiance - Manual (Page 18)

3: Jaz Setup for Absolute Irradiance
12 JAZ-A-IRRAD-02-201011
The following settings can be changed:
int_sphere=NO // Select YES if using an integrating sphere
collection_area=0.119459061 // Be sure to use the correct collection area in cm
2
*
boxcar_width=5 // JAZ can use boxcar smoothing. Select the value here.
scans_to_average=2 // Select averaging of your spectra.
electric_dark=ON // Turn on the electrical dark feedback loop. ON or OFF
graph_x_min=400.0 // Start wavelength [nm] on screen (file includes total range)
graph_x_max=700.0 // Stop wavelength [nm[ on screen
graph_y_min=0.0 // Y axis start in uW/cm
2
/nm on screen
graph_y_max=10.0 // Y axis stop in uW/cm
2
/nm on screen
single_wavelength=OFF // Choose spectrum or specific Y-value on screen
base_filename=OUTPUTFILE // Choose filename description.
default_proc=ALL // Choose which processed parameter to display on screen.
Choices are: LUMEN, LUX, PAR, WATT, or ALL (all 4
parameters)
scientific_notation=OFF // Choose processed parameters to be displayed in scientific
mode or generic values
max_int_time=3 // Max integration time in [s] for ‘auto adapt’ algorithm. If the
algorithm does not reach the maximum counts levels at this
time, it will stop the procedure.
*Some example area values to be entered in this file:
 CC-3-UV: Diameter 3900, area 0.119459061 cm 2 .
 CC-3-DA: Diameter 7140, area 0.400392842 cm 2 .
 QP600-2-VIS/BX fiber: Diameter 600. area 0.002826 cm 2
.
Once you have set the desired parameters, copy this config.txt file to the correct folder on your SD card.
Copying the Calibration File to the SD Card
You must copy the calibration file (see Chapter 2: Calibration ) to the same directory that contains your
config.txt file.
Your current calibration file should have a filename similar to xxxx.cal . Be sure that the file contains one
column of data. Change the calibration filename to the default ‘cal.txt’ and copy it to the correct directory
of your Jaz module on the SD card.
Now you are ready to start using Jaz and perform absolute irradiance measurements. See Chapter 4:
Operation .