Leica DISTO D810 touch Frequently Asked Questions Manual page 3

Leica TRI 120
This tripod is very compact but sturdy and has twist locks for the legs.
Leica TRI 200
This is a compact construction tripod with a ¼ "screw for fixing DISTO™ adapters or for use with line lasers.
This tripod provides highest stability.
Leica FTA 360 adapter
To achieve higher accuracy, we are offering the tripod adapter FTA 360 with fine adjustment for convenient
and accurate aiming. This adapter is designed to be used as a tripod head (TRI 70, TRI 100, TRI 120 and TRI
200) or can simply be placed on a flat ground.
Leica TA 360 Adapter
In order to achieve more flexibility we are offering the tripod adapter TA 360. This adapter is made of
aluminium which makes it very stable and accurate to be used as a tripod head. A major benefit of the TA 360
is that you can fix your DISTO™ exactly that way that the tripod tilt and rotating axis and the instrument laser
axis meet exactly in one point. This allows to do exact measurements even when turning the unit horizontally.
Please note: When using the TA 360 adapter you don't need to change the measuring reference on your
DISTO™ because the tilt axis is exactly at the instrument back end.
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.
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Can the Leica DISTO™ D810 touch also be used to measure horizontal angles?
No, the integrated tilt sensor 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).
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What is the measuring accuracy when using the direct horizontal measuring function?
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.
-> in order to have best results with the direct horizontal distance measurements, considering the deviation of
the tilt sensor, use the DISTO™ D810 touch 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)
Further information and a table of measuring accuracies you can find online in the FAQ under "Measuring
Accuracy".
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Can the historical storage memory of 30 values in the device be erased?
Yes, the memory in the device can be erased by pressing the delete button when in the memory. All memory
values will be deleted.
FAQ Leica DISTO D810 touch_en Page 3 of 8