Page 382 Thermo Scientific APEX User’s Guide
5) Make sure that the conveyor is running at the speed you will use for normal
production runs and no product is moving through the search head, then press the
Go button. The detector immediately starts measuring the X and R noise thresholds.
The monitor screen (shown below) presents a bar graph of the progress of the
calibration, which takes approximately 20 seconds to complete.
Calibrate Noise Thresholds
6) When the calibration is finished, the “Calibrate Noise Threshold” menu reappears.
Calibrate Noise Thresholds
This screen tells you the following about the IXR function.
The noise threshold for the X signal is 500.
The noise threshold for the R signal is 500.
7) Press the Back button repeatedly to exit the menu and return to the Main Menu.
Using the Auto-Calibration Function
To have your products properly calibrated during the IXR auto-calibration procedure,
you should already have installed the appropriate guides to make sure each package
passes through exactly the same spot in the search head and in the exact same
orientation. In other words, the necessary guides are in place to handle “problem”
packages (such as rectangular packages) that could otherwise pass through the search
head in a variety of locations and orientations. In addition during the calibration process,
you must run the conveyor at exactly the same speed you will use during your normal
production runs. Before starting, have about 30–50 uncontaminated packages ready.
When running the calibration procedure, please make sure that the gap between your
packages—the pack gap—is equal-to-or-greater-than the width of the search head. (For
example, if your search head is 30 cm wide, the gap between your packages should be
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