F3Ci Service Manual
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6
2.2 Functional Testing
a. Functional testing is used to confirm the serviceability of an F3Ci before it is returned to
the field for use and whenever doubt exists about its serviceability. The F3Ci must pass all tests
to be considered serviceable and ready for use. Whenever a line replaceable unit is replaced or a
repair is conducted, all functional testing must be completed.
b. Functional testing requires a ground balance test piece. The ground balance test piece
simulates mineralised ground which results in a detection tone from the detector. A mineralised
“hot” rock or adequate amounts of local mineralised soil is suitable. Alternatively, a ceramic floor
tile or clay roof tile may be suitable for use as a ground balance test piece.
c. T
he Switch on Test. The switch on test checks that power is correctly supplied to the
F3Ci and internal diagnostics discover no system fault. The test is conducted as follows:
• Prepare the detector for use.
• Hold the coil at least 60cm (24in) away from the ground and any metal objects.
• Ensure the sensitivity knob is set to the default position 4.
• Switch on.
• Ensure that a rising tone is heard followed by two beeps (indicating the F3Ci is set to
sensitivity position 4).The F3Ci will now begin detecting metal, if no metal targets are
detected a heartbeat tone will commence.
d. N
oise Cancel Test. The noise cancel test ensures the F3Ci successfully completes the
noise cancel procedure required whenever local electrical interference is present. The test is
conducted as follows:
• Hold the coil stationary and at least 60cm (24 in) off the ground and away from any
metal objects during the test.
• Press and immediately release the Noise Cancel button. (Figure 4)
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