Waters Autospec Premier Operator's Manual page 92

Voltage SIR function editor parameters (Continued):
Parameter
FI Set up
Total Cycle Time
(mS)
Primary Lock Span
(pw)
Secondary Lock
Span (pw)
Lock Mass
Threshold (mV)
Max step size (pw)
Use fast lock-on
To set up a VSIR function
1. In the MS method editor, click
Alternative:
2. In the Voltage SIR function editor, enter the required parameters.
3. Click OK.
3-28 Scanning techniques
Description
Opens the FI Set up dialog box so you can specify
that an inter-scan current be applied to an field
ionization (FI) emitter.
This option is enabled only when you select FI+
Tip:
or FI- selected as the ionization mode.
Displays the total cycle time, in milliseconds.
The span, in peak widths, over which the lock-mass
is initially be scanned.
The span, in peak widths, over which the lock-mass
is scanned, after it has been locked on for a certain
number of scans.
If the lock-mass peak intensity falls below this
value, in millivolts, the software no longer attempts
to use it to update the calibration. If the lock-mass
control is in Secondary Lock Span, it switches to
Primary Lock Span control until the lock-mass
peak's intensity recovers.
The maximum step size of lock-mass corrections, in
peak widths.
Allows the first lock-mass correction to be larger
than the specified Max step size (pw).
Click Functions > Voltage SIR.
.