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Self-Test
It is advisable to perform a self-test of the UltraPath 2 sample system before sampling.
Reference light intensity scans of all three pathlength are supplied with each UltraPath 2
sampling system. These scans were taken with Millipore de-ionized water after the cells were
rigorously cleaned. To test the UltraPath 2 sample system:
•
Switch on all instrumentation,
•
Fill the UltraPath 2 sample cell with Millipore de-ionized water and
•
Obtain reference intensities at the integration times given in the calibration sheets
(See Operation Instructions for details).
•
Confirm the results with the calibration sheets.
•
If the light intensities are significantly lower than on the calibration sheets, clean the
sample cells (see section Instrument maintenance) and repeat the Self-Test.
Note:
Light intensity output will degrade over time, as a function of bulb age. The average
lifetime of both the UV bulb and VIS bulb is 3000 hours. After this time the light output will
decrease to 50-70% of its original value.
Note:
If the color balance of the TIDAS S 300 UV/VIS bulb is changed or the bulb is exchanged,
the calibration sheets become invalid and new calibration sets should be prepared.
