CREDO DDM Metal Detector, User Manual

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8
Mode Toggle Switch
Located under the control box and accessible from the hand-grip, this
toggle switch is used to change operating modes. When pushed to the left,
the CREDO DDM
operates in Discrimination Mode. In the right position,
the Nexus Standard Mk II operates in All-Metal Mode.
Battery Test Toggle Switch.
This is located on the front panel of the control box. It is used to check the
condition of the batteries by using the DDM; if the meter bar lights one third
or less of its length, changing or recharging the batteries is recommended.
Recovery Toggle Switch.
This is located on the front panel of the control box. It is used to control the
recovery or reset speed of the detector for Slow, Middle and Fast reset. A
slow recovery is best for sites with few signals and a fast recovery for sites
with many signals or contamination.
General Operation and Setting Up
Having assembled the CREDO DDM, inserted batteries and connected the
headphones, the metal detector is ready for use.
If you are a novice metal detector user.
Simply turn on the Auto Mode, activated on the Threshold control knob on
and start detecting. With a little time and practice, as you gain experience
with the detector, you can progress to Manual Modes, already then having
some idea of what most target responses will be like. A minimum
Sensitivity level is recommended in Auto Mode to minimise clicking or/and
possible false signals.
If you have some metal detector experience.
We recommend the Auto function above for at least the first couple of days.
If you have considerable experience with metal detectors.
No metal detector, however powerful, will operate at its best unless it is set
up properly for the conditions in which it is to be used. To obtain the best
results and maximum depth and sensitivity to desired targets, the Nexus
Standard Mk II must be properly tuned to the site and the settings to
achieve this are set out below.