Leica GDF302 tripod with optical plummet

Leica GDF302 tripod with optical plummet

Just like a tripod, the stability of the tripod is an important factor in measuring accuracy. Torsional rigidity, the most important property of a tripod, is continuously checked and tested during production. The maintenance-free foot screws on Leica Geosystems tripods always provide smooth, play-free movement, even after many years of use. The support surface of the tripods perfectly matches the base of any instrument and provides extremely accurate forced centering. The robust construction of the optical plummet practically eliminates the need for adjustment throughout the tripod's entire service life. The construction is designed to function reliably even in extreme temperatures and in humid and dusty conditions.

Torsional stiffness of the original
The tripod's torsional stiffness, or hysteresis, is a measure of how accurately it returns to its starting position when the instrument has stopped. This hysteresis is a relative movement between the upper plate and the base of a tripod. The movement occurs when a TPS instrument rotates. The torsional stiffness has a direct impact on the instrument's angular accuracy, which in this case is very high. Optimizing the hysteresis as Leica Geosystems has done is a complex process that requires the highest precision: a movement of the upper plate to the lower plate of 0.3 µm corresponds to an angular error of 1". Motorized instruments with high acceleration and braking force in particular require tripods with very high torsional stiffness.

The ideal tripod for your instruments
All original Leica Geosystems tripods meet strict specifications and quality standards. Your choice of tripod should be based on your individual accuracy requirements.

Professional 5000: Hysteresis: maximum 1" (0.3 mgon) or better.
Professional 3000: Hysteresis: maximum 3" (1.0 mgon)
Professional 1000: Hysteresis: maximum 5" (1.5 mgon)