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Thermo Scientific APEX User’s Guide
Page 205
Keying In Limits for Peak-Signal and Phase-Angle Values
This menu allows you to key in limits for the peak-signal and phase-angle values
obtained when running the QA test. Limits are set as percent change above (+) or below
(–) the previous average test value. The function allows you to have the detector give
you a warning, alarm, or fault when these limits are exceeded by the current test
values. Thus, you should set a small limit (for example, a 20% change) for a warning, a
medium-sized limit (for example, a 40% change) for an alarm, and a large limit (for
example an 80% change) for a fault to occur.
Example
In the example below, we are going to change the peak-signal limit for a warning from
the default of 20% to 10%.
1)
Navigate to the peak-signal warning-tolerance function.
Peak Warning Tolerance
2)
Press the Go button, and an input screen appears—showing the warning icon and the
current setting of 20%.
Peak Warning Tolerance
3)
Key in a new percent value (“10”) and press the Go button to save your setting and
exit the input screen.
4)
Follow the basic outline in steps 1–3 above to change all other values in this screen.
Note that for a warning, alarm, or fault (WAF) to occur, the appropriate external
devices must be connected to the detector’s wiring board, and the WAF devices
assigned to the appropriate output (Output 1–6). For more information, see
pages 232 and 290.