User`s guide

Before You Begin
Voyager
™
Biospectrometry
™
Workstation User’s Guide 6-9
6
Calibration
equations
The general equation that the Voyager software uses for
calibration with a .CAL file is described in Figure 6-1.
Figure 6-1 Calibration Equation
Default
calibration
The default theoretical calibration is a multi-parameter
equation that uses calculated values for t
0
and A. Calculated
values are based on the configuration of the system, such as
flight tube length and accelerating voltage.
t (nsec) = t
0
+ A
where:
t
0
= Difference in time between the start time of the analysis
Effective Length (mm)
√
Accelerating Voltage (V)
x
√
m
0
2e
x 10
6
A
where:
m
0
= 1 dalton mass in SI units (1.66054 x 10
-27
kg)
e = charge of electron in SI units (1.602177 x 10
-19
Coulomb)
Effective Length = Length of flight tube corrected for ion
acceleration through the stages of
the source and flight tube, and for the
impact of the guide wire.
and the time of ion extraction in Delayed Extraction,
or the time of ionization in Continuous Extraction.
Also called Effective Delay.
+ (higher order terms)
√
m/z
m/z = mass-to-charge ratio
~
~
t
=
Flight time of the ion