Micromass Quattro Ultima, User Manual

Page: 65 / 227

To set up a collision energy ramp:
Choose Collision Energy Ramp Gradient from the tune page Ramps menu.
Two values of collision energy are
defined at two particular masses. These
values define a gradient for the collision
energy voltage which is then
extrapolated to cover the full mass
range.
Make any changes required and
press
OK to exit.
To initiate the collision energy voltage
ramp:
Press , or choose Use Collision Energy Ramp from the tune page
Ramps menu.
Resetting the Zero Level
The zero level (or baseline) can be repositioned by pressing , or by choosing
Reinitialize
from the tune page
Options
menu.
This command causes the instrument control system to measure the position of the
noise signal so that any baseline offset caused by the electronics or instrumentation
can be compensated for.
It is advisable to reset the zero level whenever one of the multiplier voltages is
changed.
Tuning
Page 65
Quattro Ultima
User's Guide