Calibrating The Speed Filter Using A Ferrous Test Ball - Thermo Scientific APEX 100 User Manual

Calibrating the Speed Filter Using a Ferrous Test Ball

In this section you will learn how to calibrate the speed filter using a 2.0 to 4.0 milli-
meter ferrous test ball. Please note that in a gravity-feed application the default speed
filter is a narrow-band pass filter that rejects most background noise, but still allows a
maximum metal signal from the search head to be processed by the detector.
1) Follow steps 1–4 in the "Choosing Your Preferred Units of Measure" section on
page 22 to get to the menu shown below—page 2 of the system and tools menu.
System and Tools Page 2
2) Press the right-navigation button to select the speed filter menu.
Speed Filter
3) Press the Go button and the calibrate-filter menu appears.
Calibrate Speed Filter
4) Press the Go button and the following monitor screen appears.
Pass test stick to calibrate Speed Filter
Page 72 Thermo Scientific APEX User's Guide