Thermo Scientific APEX 100, User Manual, Page: 114 / 442

Page 114
Thermo Scientific APEX User’s Guide
Peak Signal
The peak-signal function is a display function, meaning there are no parameters you can
set for it. In other words, the peak-signal function acts purely as a gauge, and displays
the highest signal seen by the search head since this function was last reset. In our
example, the peak signal reading is 3, and is the highest signal produced by a series of
contaminated products that passed through the search head since it was last reset.
Peak Signal
The peak-signal value can be reset in the following ways.
• If photo registration is enabled, the peak-signal value will automatically reset
before each pack enters the search head or when each pack crosses the photo-
eye.
• Pressing the Go button, while the peak-signal icon is highlighted, will reset the
peak-signal value.
Uses of the Peak-Signal Function
The peak-signal function can be used to do the following.
• Establish the level of background noise over an entire day, week, or other
extended time period.
• Monitor the maximum signal produced by contaminants during a specified time
period—for example, the morning shift, a 24-hour day, a week, and so on.
• Monitor the long-term trends in the detector’s signal-to-noise ratio.
Frequency and Gain Menu
See page 160.
Frequency and Gain