SIR function editors 3-29
The SIR Mass dialog box
Use the SIR Mass dialog box to add an entry to, or edit an entry in, the voltage
SIR function editor mass table.
To add an entry to the Voltage SIR function editor mass table:
1. In the Voltage SIR function editor, click Add.
2. In the SIR Mass dialog box, enter the required parameters.
3. Click OK.
SIR Mass dialog box parameters
Parameter Description
Mass (m/z) The mass to be monitored by the function.
Channel Time (ms) The time for which this mass is to be monitored,
typically 50 to 150 ms (the higher values can give a
lower peak to peak noise level).
Delay Time (ms) The time delay between finishing monitoring the
previous mass in the Mass table and starting to
monitor this mass, typically 10 to 50 ms. Because
this delay allows the instrument’s electronics to
stabilize between monitoring successive masses,
type larger values for larger differences between
monitored masses. This is especially important for
the first mass in the experiment which will always
have the largest mass difference from the preceding
mass.
Use as Lock Mass When selected, specifies this mass as the lock-mass
for this function; this value is used to automatically
update the instrument’s calibration.
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