Ferrous Metal Detection - SubSurface Instruments PL-TT Series User Manual

The PL-TT offers a ferrous metal detection capability. To select this mode press the Mode key until the
Fe is shown on the LCD. The gain controls will adjust the sensitivity. This mode will only detect ferrous
metals containing iron.
This mode may need to be calibrated after shipment from the factory due to the change in the earth's
magnetic field. To calibrate first move to a location free of any metal and select the Fe mode.
Then press and hold the Frequency button until CAL appears on the LCD. Turn the gain to about half
scale on the bar graph. With the PL-TT held at a 45º angle to the ground rotate in a circle. Pause every
quarter turn and press the Frequency key, continue around the full circle. Do one additional sweep
pressing the frequency one more time at every point where the unit indicates high signal. Now turn the
unit off, the calibration procedures is finished and the unit is ready to locate.
C
alibration
Side View
Overhead
View
Overhead
View
ADJUST THE GAIN
Press the Up or Down buttons
to adjust the gain indicated
by the missing bar on the LCD,
to set the gain to about
half scale for calibration.
16
SERIES
f
errous
Side View
Gain Indicator
Overhead
View
m d
etal eteCtion
Side View
Overhead
View
Overhead
View
Overhead
View
FIRST SWEEP
Press the Frequency button
every quarter turn to calibrate
Gain Indicator
Gain Indicator
SECOND SWEEP
Press the Frequency button
on every high signal point.
Ov
Vie
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