LEICA DISTO FAQ

What accessories are recommended for the Leica DISTO D8?
Leica Tripod TRI100 For long distances we recommend using a tripod, even indoors. A tripod provides
additional steadiness and therefore allows accurate targeting, especially over long distances. We
particularly recommend the Leica TRI100 tripod.
Target Plate For measurement especially outdoors and in very bright conditions it is very helpful to use
a target plate. We offer different versions in our accessory range.
Adaptor for attachment to the pole and the tripod (LSA360) For using the Leica DISTO on a set up
pole as it is used e.g. for GPS applications we recommend the use of this adaptor. The reference point
for measurements is the back of the Leica DISTO. The lateral offset of the DISTO on the adaptor
to the center of the pole varies due to the different pole diameters. The LSA360 can also be used on
the middle column of the Leica TRI100 (tripod head can be removed). Doing indirect measurements
from there will increase the accuracy because laser axis of the Leica DISTO and tilting axis of the
Leica TRI100 are both at the same height level at the back of the Leica DISTO. The lateral offset of
the LSA360 to the center of the pole depends on the diameter of the used pole (11mm pole -> 66.9mm
offset, 15mm pole -> 69.2mm offset, 20mm pole -> 72mm offset, 25mm pole -> 74.9mm offset, 30mm
pole -> 77.8mm offset, 35mm pole -> 80.7mm offset).
Can the Leica DISTO D8 also be used to measure horizontal angles? No, the integrated tilt
sensor can only measures vertical angles. If the device is held at a transverse tilt angle greater than
±10° the display shows an info code “i156”, which means that the device is required to be held level
(transversely).
What is the measuring accuracy when using the indirect measuring functions including tilt
sensor? For example, if a distance of 10m is measured at an angle of 10°, the error on uncertainty
on measurement on the direct horizontal distance (fd) is 3mm. If a distance of 10m is measured at an
angle of 45°, the uncertainty of measurement on the direct horizontal distance (fd) is 12mm.
-> in order to have best results with the direct horizontal distance measurements, considering the
deviation of the tilt sensor, use the Leica DISTO D8 as flat as possible.
The horizontal distance error (fd) and the height error (fh) can be calculated as follows:
fd = horizontal distance error
fh = error in height
d = measured distance
a = angle at which the distance is measured
fa = possible angular error
fd = d * cos (a) – d * cos (a + fa)
fh= d * sin (a) – d * sin (a + fa)
Which customer segment would find the Leica DISTO D8 of most use for everyday tasks? The
Leica DISTO D8 is a great measurement tool for a wide range of target groups and is a superbly
device especially designed for outdoor tasks and/or use to transfer data into computers. The device is
particularly suitable, but of course not exclusively, for the following users: Architects, Surveyors, Facility
Managers, Civil Engineer, Real Estate, General Construction, Scaffolding, Painters, Facade Workers,
Joiners, Firemen, Gardening Companies, Educational Institutions, Electrical Services, Insurance
Companies, Telecommunications, Police, etc.
DISTOS FAQ.indd 7 30/06/2011 12:50:29 PM