Thermo Scientific APEX 100, Руководство пользователя

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Page 166
Thermo Scientific APEX User’s Guide
Locking the Detect Level
This function locks the current detect-level setting so that it cannot be changed—for
example by running the auto-calibration function. In the screen below, the detect-level
setting (40) is not currently locked.
To lock the detect-level setting, press the Go button and the X changes to a check
mark—indicating the detect-level setting is now locked (in our example at 40).
Detection Level Lock
Calibrating the X and R Noise Thresholds
This function allows you to calibrate the X and R noise thresholds for background noise,
and is typically used in applications where vibration from the conveyor creates
background noise that the detector may interpret as a contaminant passing through the
search head. Vibration—it is important to note—usually shows up in the X threshold
(where it increases the value).
Calibrate Noise Thresholds
Calibrating the X and R Thresholds for Background Noise
To calibrate the X and R thresholds for background noise in a conveyor application, do
the following.
1)
Turn the conveyor on (making sure no product, test samples, and so on are on the
conveyor or near the search head).
2)
Make sure the “Calibrate Noise Thresholds” function is highlighted, as shown above.
3)
Press the Go button and a monitor screen appears.
4)
Wait for the calibration function to finish. (The detector will close the menu and
assign values for the X and R noise thresholds.)