Understanding Some Basic Detector Vocabulary - Thermo Scientific APEX 100 User Manual

Table Showing How Type of Metal, Size of Metal, and Frequency
Affect Phase Angle
Metal/Size
Ferrous —1.0mm
—4.0mm
Non-ferrous —1.0mm
—4.0mm
316 stainless —2.0mm
—4.0mm

Understanding Some Basic Detector Vocabulary

Listed below are definitions to help you understand some of the terms that will be used
while setting up and operating your detector. In addition, many of these terms are
defined in the manual's Glossary on page 393.
Phase
The phase angle of the product effect.
Locked
Locked parameters are not automatically updated during a product learn. The detect
level and phase angle can be individually "locked" during a product learn, indicating their
previous value is not re-learned. A padlock symbol on the screen indicates a parameter
is "locked."
Frequency
The operating frequency of search head is as follows: 50 kHz, 100 kHz, 150 Hz,
200 kHz, 300 kHz, and 500 kHz. The APEX is capable of switching between two
frequencies, typically 50 kHz and 300 kHz, or 100 kHz and equal to or above 300 kHz.
Head Gain
Head gain is the signal amplification of the search-head hardware. Gain is controlled via
the detector's main menu and can be high or low.
Thresholds
Thresholds are maintained for resistive and reactive effects and, if exceeded, usually
indicate a product is present.
Detect level
If the signal from metal or noise exceeds the detect level, then the reject output
activates.
Thermo Scientific APEX User's Guide
300KHz 200KHz
98° 96°
130° 120°
42° 30°
82° 78°
10° 8°
48° 34°
150KHz 100KHz
96° 94°
114° 108°
25° 20°
72° 64°
6° 5°
26° 16°
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