Bosch Power Tools DMD4 Scanning in Metal-Detection Mode, Preliminary Metal Scan Zoom Metal Scan

BM 2609140574 08-08 9/3/08 8:40 AM Page 6

Scanning in Metal-Detection Mode

PRELIMINARY METAL SCAN ZOOM METAL SCAN

When scanning for metal objects, press the metal detection mode button 6. The metal detection mode indicator c is indicated in the display and the illuminated ring 1 lights up green.

Position the multi-detector then move it uniformly across the surface.

• When the multi-detector comes close to a metal object, then the amplitude increases, as represented by the number of bars shown in the main measuring indicator f.

• When it moves away from the object, the amplitude and number of bars shown decreases.

At the position of maximum amplitude, the metal object is located below the center of the sensor (below the marking opening 2).

As long as the multi-detector is above the metal object, the illuminated ring 1 lights up red and a steady tone sounds.

Notes:

•The ability to detect nails, screws, rebar and other metal objects is somewhat dependent on their orientation. For example, at any given depth it is easier for the unit to detect the length of a screw or nail than it is to detect the end of a screw or nail.

•The entire width (3-1/8” / 8 cm) of the detector can detect metal near the surface of scanned items, so the unit is wide enough to scan for metal near the surface of a 3” wide board prior to sanding or planing.

•When a metal item is much narrower than the SENSOR area, the maximum signal might be displayed when the item is just under the left and right of the center hole, rather than the center of the hole, especially if the item is near the surface.

•Always measure SLOWLY to achieve maximum accuracy and sensitivity

•Use the ZOOM feature to maximize sensitivity, especially important when searching for deep items prior to drilling, sawing, nailing and/or routing.

The ZOOM mode should be used AFTER the Preliminary Metal Scan for the purposes listed below.

•ALWAYS start the ZOOM Metal Scan near the location that the metal object was detected in the Preliminary Metal Scan.

•Press the “ZOOM” button 4 and KEEP IT PRESSED while continuing to move the multi-detector over the area. Observe only the ZOOM measuring indicator e.

Precision Location - The ZOOM function can be used to more-precisely locate the center of a metal object and for distinguishing between close metal objects. The “ZOOM” measuring indicator e has the greatest amplitude over the center of the metal object.

Detection of Small or Deep Objects - The ZOOM function can also be used when very small or deeply embedded metal objects are being detected but the main measuring indicator f does not react.

Detection Though Material With Metal inclusions - The ZOOM function can also be used if there are any metal inclusions in the material being scanned, such as wire mesh in lath and plaster walls, then a continuous signal is indicated in the main measuring indicator f.

MAGNETIC VS. NON-MAGNETIC METALS If the metal object found is a magnetic (e.g. iron or steel), then the indicator for magnetic metals h is displayed.

For non-magnetic metals, the indicator for non-magnetic metals i is displayed.

In order for the multi-detector to differentiate between the metal types, it must be positioned above the detected metal object and the detection must be strong enough that the illuminated ring 1 lights up red.

For weak signals, the indication of the metal type is not possible. For steel wire mesh and similar reinforcements in the scanned structural material, amplitude of the main measuring indicator f is displayed over the complete surface. In this case, always use the “ZOOM” function for the scan. When scanning over steel mesh in concrete, typically (but not always) the indicator for magnetic metals h is displayed directly above the rebar; the indicator for non-magnetic metals i is displayed between the rebars.

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