41Chapter 5 XLT® Pro Options19. Bottlecap RejectAdjusts how strongly the instrument rejects orbreaks up on iron.Most starting programs use the minimum setting.As larger numbers are selected, more bias rejectionagainst iron occurs.The advantage of higher BOTTLECAP REJECTsettings is that in high-trash areas more decisiveiron rejection occurs. Trash becomes easier toidentify by the broken sounds they produce.The disadvantage of a high Bottlecap Rejectionsetting is if an iron target is close to a good metal,the high degree of bias against iron may cause thedetector to cancel both responses. Another disad-vantage is that all targets, iron and non-iron, tend tostart sounding more broken at high levels ofBOTTLECAP REJECT. The operator needs tofine tune BOTTLECAP REJECT according to theirpreferences and the conditions being searched.Some ground conditions make it difficult for theinstrument to recognize iron. BOTTLECAP RE-JECT allows compensation for these areas.4BOTTLECAP REJECTMIN MAX(Discrimination section)Tips - If having difficultiesrecognizing the brokensounds of iron, try increas-ing BOTTLECAP REJECT.