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7 Operational guidelines
7.1 System limitations
The Quarryman Pro is water and dust resistant (IP66 in accordance with IEC 60529:1992+A1:2002) but should not
be submerged.
Under Carlson test conditions, the laser ranges up to a limit of 750 m to 90% reflective material (e.g. Kodak white
card), where the target is larger than the footprint of the laser and the angle of incidence is perpendicular to the path
of the laser.
However, the maximum achievable range at any given time or location will depend on a number of factors. The
following factors will limit the range to an unpredictable degree and, in some circumstances, may prevent any
readings from being taken:
• dark, light-absorbent surfaces such as coal
• very dusty environments
• wet, slick, shiny or very smooth surfaces
• an acute angle between the laser and the surface
The Quarryman Pro is calibrated and focused for long range applications. The minimum calibrated range of the
laser is 10 m. At shorter distances, readings may still be recorded, but their precision will be severely diminished.
Do not point the laser directly into the sun. This could lead to spurious points being collected and, as a worst case,
the laser itself could be damaged.
Only use the Quarryman Pro when it is mounted on a stable tripod. If you move the tripod, or the position of the
instrument on the tripod, during operations at a single station, the collected data will be invalid. Take care to level
the instrument, secure the tripod in the ground and securely fasten the screws on the tripod legs.
Do not use the Quarryman Pro to shoot to reflective prisms as the accuracy of recorded ranges may be affected.
Never use a reflective target when last-hit mode is switched on, as this can cause ranges to be observed that are
twice as long as the actual distance.
7.2 Instrument heights and target heights
Once the Quarryman Pro has been secured on the tripod and levelled using the level bubble, carefully measure the
instrument height. In the Quarryman Pro menu, there is only one chance to enter the instrument height: when the
unit is first switched on. If you enter the instrument height incorrectly at this stage, either restart the instrument or
else note the measurement and enter it later in your processing software.
The measurement of the instrument height is particularly important if multiple data sets from different instrument
positions are going to be stitched together: for example, carrying out a traverse around a stockpile, or taking range
and bearing observations to new instrument positions when a complete quarry face cannot be viewed from a single
location.
In these cases, if you do not enter the instrument height, or you enter it incorrectly, scans taken from different
locations will not match up.
The instrument height is the vertical distance from the ground directly beneath the instrument to the embossed
cross on either of the side panels.
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