All-Metal Mode

All-Metal mode provides greater detection depth and higher sensitivity than Discrimination mode by allowing you to eliminate false signals caused by soil mineralisation through ground balancing.

We recommend using All-Metal mode once you are already comfortable with Discrimination mode.

What You Can Do in This Mode

• Observe the Target ID value on the scale
• Adjust Gain and Threshold by knob
• Perform automatic or manual ground balance
• Observe Ground Phase (GND PHASE) — the type of ground mineralisation
• Observe the Fe3O4 level — the amount of ground mineralisation

info

In All-Metal mode the centre value shows GND PHASE (ground type), not Target ID as in Discrimination mode.

Ground Balancing

Soil contains iron minerals that produce signals much stronger than buried targets. Ground balancing calibrates the detector to your local ground conditions, eliminating these false signals and enabling deeper, more accurate detection.

Automatic Ground Balance (Ground Grab)

1. Enter All Metal mode from the main menu.
2. Set the Gain knob to the middle position.
3. Turn the Threshold knob until you hear a faint background hum.
4. Find a clear patch of ground with no metal present and sweep the coil across it.
5. Press and hold the GG (Ground Grab) button while raising and lowering the coil repeatedly over the clear soil.
6. Watch the GND PHASE value — when it settles to a variation of only 1–2 numbers, release the GG button while still pumping the coil.

Ground balance is now set for your current location.

Manual Ground Balance

Use the +/- buttons to manually increase or decrease the ground balance value.

For fine adjustment, continue to pump the coil over clear soil:

• If the signal is louder as you raise the coil → increase ground balance.
• If the signal is louder as you lower the coil → decrease ground balance.

Ground Mineralisation Reference

The Fe3O4 reading indicates soil mineralisation type. Very high mineralisation can make the detector unusable — if this happens, raise the coil height above the ground.

Ground type	GND PHASE range
Wet salt and alkali	0 – 10
Metallic iron (rare — likely over metal)	5 – 25
Occasional saltwater beaches	26 – 39
Red, yellow, brown iron-bearing clay minerals	40 – 75
Magnetite and other black iron minerals	75 – 95

Best Gain & Threshold Settings

For Maximum Sensitivity

1. Set Gain at a low level.
2. Set Threshold to a positive value (>0) — so you hear a faint background hum.
3. Gradually increase Gain to a comfortable level.

For Silent, Comfortable Searching

1. Set Threshold to zero or a negative value.
2. Reduce Gain if necessary.