Voyager DP-263-S Betriebsanweisung Seite 316

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Chapter 6 Acquiring Mass Spectra
6-4 PerSeptive Biosystems
6
6.1.2 Guidelines for Acquiring
This section includes:
High voltage warmup for improved mass accuracy
Initial laser setting
Using optimized instrument settings
When acquiring a spectrum
Obtaining acceptable data
Obtaining maximum mass accuracy
High voltage
warmup for
improved mass
accuracy
For maximum mass accuracy, allow the high voltage power
supplies to warm up for a short period of time before
acquisition. This reduces variability in accelerating voltages,
and yields more reproducible ion flight times.
To turn on the high voltage power supplies, click in the
toolbar.
NOTE: The high voltage power supplies are automatically
turned off after 60 minutes if the mass spectrometer is not
used. To change the Idle Time, see “High voltage
configuration” on page 2-33.
Initial laser
setting
After starting the software, the laser intensity is set to the
mid-range default laser setting (approximately 1,800). When
you load a .BIC file, the laser intensity that was stored in the
.BIC file is loaded in the Instrument Control Panel. See
“Adjusting laser intensity” on page 5-58, for more information.
Using optimized
instrument
settings
Before analyzing samples in the Instrument Control Panel,
open and optimize instrument settings in a .BIC file. You can
optimize more than one .BIC file to cover mass ranges or
compounds of interest.
For more information, see Section 5.4, Optimizing Instrument
Settings Parameters.
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