PAGE 32 Metor 6M
Installation and Operating Manual
8. CALIBRATION 92102916 REV 5
Choosing operating frequency
Start the calibration of the equipment by choosing a suitable operating frequency.
This means selecting for the frequency that gives enough low background
interference level. It is recommended to use frequency auto search function. Also
manual frequency search can be used.
Frequency setting should be changed when background interference level is too
high or several units are used side-by-side.
Interference may be caused by other electric devices near the installation site, or
another metal detector in side-by-side operation (See "Side-by-side operation" on
page 17). A suitable operating frequency may vary depending on the installation
environment and the sources of interference.
While searching for the frequency, you can increase the sensitivity level so that the
differences between frequencies are easier to observe. See also "Manual setting of
overall sensitivity" on page 39.
1. Set operating frequency F1 into use.
2. Observe the number of bright boxes illuminating on the display.
3. Select each operating frequency (F1 - F10) one at a time, and observe the
amount of background interference on the display. For optimal operation of the
equipment, the number of illuminating bright boxes should not exceed 2 - 4
when nobody is passing through the gate.
4. Set into use the operating frequency that gives the smallest number of bright
boxes illuminating on the signal display.
Frequency search
Set Frequency (1.3.1) has in addition to a number of manually selected frequencies
a frequency search feature as the first frequency item, that automates the frequency
search.
During a frequency search it is not recommended to have any metal objects around
the WTMD device. Frequency auto search can be executed every time the device
is powered up if the search in start-up (1.3.2) function is enabled.
It is not recommended to use search in start-up in side-by-side operation, because
during frequency search units nearby may be disturbed.
1 METAL DETECTION
PARAMETERS
1.1 SENSITIVITIES
1.1.1 SENSITIVITY
1.2 PROGRAM
1.3 FREQUENCY
1.1.2 ZONE SENSITIVITITIES
1.1.3 AUTO SENSITIVITY
1.3.1 SET FREQUENCY
1.3.2 SEARCH IN START-UP
1.1.4 AUTO FLOOR SENSITIVITY
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