
Chapter 8 Maintenance and Troubleshooting
8-10 PerSeptive Biosystems
8
Poor resolution/ sensitivity
in Delayed Extraction
mode
Delay Time and Grid
Voltage% not
optimized
Optimize. See Section 5.4,
Optimizing Instrument
Settings Parameters.
Guide Wire Voltage%
not optimized
Optimize. See Section 5.4,
Optimizing Instrument
Settings Parameters.
Wrong Bin size or
number of data
points and Vertical
Scale selected for
components below
15,000 Da
In the Mode/Digitizer dialog
box, select a Bin size with a
2 nsec dwell time.
In the Mode/Digitizer Options
dialog box, select a Vertical
Scale of 200 mV.
Oscilloscope and
LeCroy systems
only—Wrong Input
Bandwidth setting
Select Full for Input
Bandwidth in Mode/Digitizer
Options dialog box.
NOTE: Input Bandwidth is not
available on Signatec
systems.
Laser not properly
aligned
Call PerSeptive Biosystems
Technical Support.
High voltage control
circuit not functioning
properly
Call PerSeptive Biosystems
Technical Support.
Flat tops on peaks Signal is saturated,
laser power is too
high
Decrease laser setting using
the slider controls on the
Manual Laser control page
until peak tops are sharp.
Table 8-1 Spectrum Troubleshooting (Continued)
Symptom Possible Cause Action
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