Thermo Scientific APEX 100, User Manual

Page: 209 / 442

Thermo Scientific APEX User’s Guide
Page 209
Why Locking the AuditCheck Values Is Useful
Locking the AuditCheck values for phase angle and peak signal is useful, because it
prevents the less-accurate auto-calibration values over-writing the more-accurate
AuditCheck values. Auto-calibration values are inherently more variable, because the
response of the search head to the passage of a contaminant is dependent on position—
for the simple reason that the edge of the head is significantly more responsive than the
center. As a result, the AuditCheck values are significantly more accurate than the auto-
calibration values for the following reasons. First, the AuditCheck sample always passes
through the head in exactly the same position; and second, the AuditCheck sample
passes through the edge of the search head, where its response to metallic
contaminants is greatest.
Locking the AuditCheck Values
1)
To lock the AuditCheck values for phase angle and peak signal, highlight the padlock
function.
2)
Press the Go button and the X changes to a check mark.
3)
Press the Back button to lock these values and exit the function.
Setting Manual-Start, Timing-Limits, and Reject-Device
Parameters
These functions have already been described in detail for the Quality Test function in the
Quality Test section, starting on page 196—so please refer to the appropriate sections in
the Quality Test write-up for detailed instructions, as the Timing-Limits, and Reject
Device Parameters are very similar for AuditCheck and the Quality Test function.
AuditCheck – Timers and Reject
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