Waters Micromass ZQ 2000, Operator'S Manual

Page: 52 / 133

Tuning 52
3
3.4 Readbacks
Readbacks report current instrument performance in most of the parameters whose
values you specify on the Tune window’s pages. They appear as red numerals in read-only
fields. These fields are adjacent to those that contain the parameters’ set values. Monitor
readbacks to determine whether the instrument performs to your parameter settings.
MassLynx provides readbacks on all Tune window pages. You can, however, prevent them
from appearing on the Source and Analyser pages or limit their display to those that are
out of range.
1. Select Options > Readbacks to open the Readbacks dialog box ( Figure 3-8 ).
Figure 3-8 Readbacks Dialog Box
2. Evaluate readbacks, including those on the Diagnostics page ( Figure 3-9 ). Most
Source and Analyser page readbacks should match the parameter values you
specify.
Note: Some readbacks serve a broad diagnostic purpose and therefore do not
necessarily mirror their set values. For example, a voltage readback can vary from
its set value when the instrument’s proper operation does not depend on that
voltage. In such a case, whether voltage is at all present is the more critical
measure.