Hilti PD 42 Mode D'emploi page 27

To avoid the risk of injury, use only genuine Hilti accessories and additional equipment.
Modification of the tool is not permissible.
NOTE
Observe the permissible operating and storage temperatures.
2.2 Display
The measurements, settings and tool status are shown in the display. When the tool is in measuring mode, the
measurements taken are shown at the bottom of the display area (the result line). When using a function, e.g. area
measurement, the distances measured are shown in the intermediate result line and the calculated result is shown at
the bottom of the display (the result line).
2.3 Display illumination
In low light conditions, the display is illuminated automatically as soon as a button is pressed. The display illumination
intensity is reduced to 50% after 10 seconds. If no button is pressed over a period of 20 seconds, the display
illumination switches off automatically.
NOTE
Illumination of the display consumes battery power. Shorter battery life is therefore to be expected when this feature
is used frequently.
2.4 Basic principle
The distance is measured along a laser beam emitted by the tool to the point at which the beam strikes a reflective
surface. The target from which the measurement is taken is clearly identified by the red laser measuring spot. The
range of the tool depends on the reflectance and structure of the target surface from which measurements are taken.
2.5 Measuring principle
The tool emits a visible laser beam carrying signal pulses which are reflected by the target. The time between reflected
pulses is used as a basis for determining the distance.
This measuring principle permits highly accurate and reliable measurement of distances to objects without need for
special reflectors.
2.6 Standard measuring display mode
Standard measuring display mode is always activated when the "On/off" or "Measure" button is pressed to switch the
tool on.
2.7 Symbols in the display
Temperature
Unfavorable conditions, poor signal
General hardware error
2.8 Control panel
Measure button
Plus button
Temperature too high
(>+50°C) / too low (<-10°C).
Insufficient reflected laser
light.
Switch the tool off and on again. If the fault persists, please contact Hilti
Service.
Activates the laser beam.
Begins distance measurement.
Activates continuous measuring mode (long press, approx. 2 sec.).
Stops continuous measuring mode.
Initiates distance, area and volume addition.
Adds distances in standard measuring and painter's measuring modes.
Adds areas and volumes in the relevant modes.
Allow the tool to cool down or warm up.
Observe the minimum measuring dis-
tance (50 mm from the front edge of the
tool); clean the lenses; take measure-
ments from a different surface or use a
target plate.
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