Hilti PD 40 - Display and Operation Principles; Display and Illumination; Basic and Measuring Principles

Take the influences of the surrounding area into account. Do not use the appliance where there is a risk of fire
or explosion.
Observe the information printed in the operating instructions concerning operation, care and maintenance.
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.
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