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Net Weight 2.5kg
Operating Temp -30°C to +65°C
Working range +14’ Magnification
Telescope Erect image Setting time <2S
Standard deviation of 1KM double run <+ 1.0 mm
Shortest focusing distance 1.6m Additive constant 0
Field of view at 100m 2.3m Clear objective aperture 45mm
Sensitivity of circular level per 2mm run 8’ /2mm Multiplication factor100
Dismountable eyepiece, assorted accessories, such as: Diagonal Eyepieces. Adopt crossing suspender frame and compensator of air damper.
We know that compensator is made up of metal material and glass is made up of metal material and glass material, the temperature can affect these material’s results in slight changes of compensator, then causes change of / angle.
The instrument without temperature offset is always not to reach the standard of
nation (GB/T 10156-1997).
In the diagram, the yellow area between the red lines is an acceptable
area when the compensator is changed along with the temperature’s change (Company standard: +0.5 / C).
The red thick line A is a change curve for angle / of level without temperature offset.
Our ESL2 level add a device of temperature offset, it can correct the change value of angle / after offset, the instrument can be good work in the malconditions of larger temperature change, especially apply to transformation observation at a long time.
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