Hilti PD-I Mode D'emploi page 31

1. Switch on the laser by pressing the "Measure" but-
ton.
2. Aim the tool at the target and press the "Measure"
button.
The measured distance will be shown in the result
line in less than a second.
7.1.1.2 Continuous measuring (tracking)
NOTE
During continuous measuring, distances are updated in
the result line at the rate of approx. 6 - 10 measurements
every second. The measuring rate depends on reflectivity
of the target surface. If the signal tone is active, continu-
ous measuring is indicated by a signal tone approx. 2 - 3
times per second.
1. Press the "Measure" button for about 2 seconds to
activate continuous measuring mode.
2. Measuring is stopped by pressing the "Measure"
button once again.
The last valid measurement is then shown in the
result line in the display.
7.1.2 Measuring in bright conditions
We recommend use of the PDA 50, PDA 51 or PDA 52
target plate for long distances and in very bright light
conditions.
7.1.3 Measuring range
7.1.3.1 Increased range
The range of the tool is generally increased when meas-
urements are taken in the dark, at dawn or dusk and
when the target and/or the tool is shaded from bright
light.
Use of the PDA 50, PDA 51 or PDA 52 target plate also
increases the range of the tool.
7.1.3.2 Reduced measuring range
Measuring range may be reduced in bright conditions,
e.g. in bright sunlight or when working under very power-
ful floodlights.
The range of the tool may be reduced when measure-
ments are taken through glass or when objects lie within
the path of the laser beam.
The range of the tool may be reduced when measure-
ments are taken to mat green, blue or black surfaces or
to wet or shiny surfaces.
7.2 Adding / subtracting distances
Individual distances can be added or subtracted con-
veniently.
Addition can be used, for example, to determine the total
length of window and door reveals or to add several
part distances together in order to determine the total
distance.
Subtraction can be used, for example, to determine the
distance between the underside of a pipe or duct and
the ceiling. This can be done by subtracting the distance
between the floor and the underside of the pipe from the
distance between the floor and the ceiling. If the pipe
diameter is subtracted, the result is the distance between
the top of the pipe and the ceiling.
1. Press the "Measure" button (the laser beam will
switch on).
2. Aim the range meter at the target.
3. Press the "Measure" button.
The first distance will be measured and displayed
(the laser then switches off).
4. Use the right or left arrow buttons to select the
desired arithmetic function.
5. Press the "Measure" button.
The laser beam switches on.
6. Aim the range meter at the target.
7. Press the "Measure" button. The second distance
is then measured and displayed in the intermediate
result line. The result of the addition or subtraction
is shown in the result line. You can add or subtract
any desired number of distances.
NOTE Whenever you see the + and – option in the
measuring function area of the display you may add
or subtract a second measurement using the same
function. If, for example, you are using the area
measurement function, you can use the right or left
arrow buttons to add or subtract several other areas.
7.3 Measuring areas and volumes
To measure areas and volumes, select the Areas and
Volumes application group. Select the appropriate func-
tion for your measuring task.
7.3.1 Measuring rectangular areas
Each step of the area measurement operation is indicated
graphically in the display. To measure a rectangular area
you are required to measure two distances. For example,
to determine the floor area of a room, proceed as follows:
1. Select the Rectangular Area function from the Areas
and Volumes application group.
2. Aim the range meter at the target.
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