Ground Balance/Audio Reset Button; Noise Cancel Button - Minelab F3 Compact Operation Manual

Ground Balance/Audio Reset Button

Easily identifiable as the Green Button located on top of the Handle Assembly, this
dual action button carries out the following functions:
a. Ground Balance. (Press and hold the Green button) A key feature of the
F3 Compact is its ability to detect metallic mines in all ground conditions. False
alarms due to mineralised (magnetic/lateritic) soils are automatically removed
through the Ground Balance procedure.
b. Audio Reset. (Press and immediately release the Green button) On occasion,
the F3 Compact may become louder than normal with a constant tone. Holding
the coil stationary over a metallic object or over mineralised ground for an
extended period of time may cause this. The Audio Reset procedure will remove
any constant tone making the F3 Compact quiet (refer to "Audio Reset" on
page 27).

Noise Cancel Button

Using the Noise Cancel button located on the left of the LED display, the
operator can initiate an automatic frequency scanning sequence. As a result the
F3 Compact will select an operating frequency that minimises the effects from
sources of electrical interference.
16 | Functional Description F3 Compact Operations Manual