Sea-Bird Scientific SUNA V2, User Manual

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6.4 Compare reference spectrum files
Compare the change between two reference spectrum files. The amount of change is
related to the time interval between the updates and the amount of lamp use during that
time.
Note that this procedure is done automatically by the software when the user updates the
reference spectrum for the sensor. Refer to
Update reference spectrum on page 22 for
more information.
1. From the Data menu, select SUNA , then Compare Calibration .
2. Push Browse to find the first calibration, or reference file, to compare.
3. Push Browse to find the second file to compare. Note that the files must be from the
same sensor.
4. Push Compare .
A typical update interval of 3–6 months with no more than 100 hours of lamp use
should cause a change of no more than 10% in the 215–240 nm interval.
Below 215 nm, larger relative changes are normal.
Above 240 nm, the change is smaller than at the 215–240 nm range.
If there is a large change, do several reference updates 12–24 hours apart to monitor
the stability of the reference spectrum.
6.5 Update SUNA firmware
At regular intervals, make sure that the current firmware is installed in the sensor.
1. Go to the manufacturer's web site to get the current firmware for the sensor.
2. Save the firmware to the PC.
The firmware is an ".sfw" file.
3. Make sure that the sensor is connected to the PC and a power supply.
4. Push Connect .
5. Go to the Sensor menu and select SUNA , then Advanced , then Upload Firmware
File .
Maintenance
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