Voyager DP-263-S Podręcznik Użytkownika Pobierz pdf (Strona 541)

100

101

Obtaining Good Spectra in Continuous Extraction Mode

Voyager

™

Biospectrometry

™

Workstation User’s Guide H-13

Determining

threshold

Determining laser threshold becomes easier with

experience. Sample is consumed when exposed to the

laser, so minimize the number of spectra you acquire to

determine threshold.

H.2.2.2 Adjusting the Laser Intensity

This section describes:

• Adjusting the laser

• Fine-tuning threshold

Adjusting the

laser

NOTE: If settings are not listed for the matrix, set the laser

to the lowest “high setting” listed for another matrix and

start at step 2.

1. Set the laser to the high laser setting for your system.

2. Start an acquisition and acquire about 10 spectra. At this

high laser setting, you may see a saturated spectrum

where peaks are full scale and may be truncated

(Figure H-5).

NOTE: A saturated spectrum has flat-topped peaks. If the

spectrum goes off the screen, adjust the position of the

spectrum to see if the top is flat.

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