Ocean Optics LIBS2000+ - Manual (Page 30)

3: Operation
The first radiometric calibration file is for Spectrometer Unit A, the second file is for Spectrometer Unit
B, etc. You can also apply a channel-specific Radiometric Adjustment to scale the calibrated data.
Initial Testing
Once you have set up your LIBS2000+ system and configured it, you are ready to perform initial testing
with a sample.
► Procedure
1. Check that the switches on the rear of the laser power supply are set for external triggering.
2. Turn the laser power supply on, making sure that the prf (laser repetition rate) is set to 0, the Q-
Switch is on, and the power bar is adjusted to 5 bars.
3. Push the Run button on the laser power supply. The flash lamp capacitor should charge and
remain idle while waiting for an external trigger.
4. Open the door of the Sample Chamber and make sure that the laser power supply automatically
shuts down.
5. Close the Sample Chamber door and push the Run button again to recharge the flash lamp
capacitors.
6. Insert a standard LIBS sample into the Sample Chamber.
7. In OOILIBS, select Scan Type | Single Shot from the menu bar.
8. In OOILIBS, click the Scan button. The laser should fire in the Sample Chamber.
9. In the Sample Chamber, align the fiber optic assembly relative to the sample plasma to optimize
sensitivity of the LIBS measurement.
10. In OOILIBS, select Tools | Set Q Switch Delay from the menu bar. This opens the Adjust Q
Switch window, displaying the signal based on the Q-switch delay. You can be sure that this is
functioning properly by observing the change in continuum and emission strength as a function of
delay settings, both positive and negative.
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