Geodetic
FPM FG-020 Precision Construction Level
FPM FG-020 Precision Construction Level
FPM FG-020 with a 31x magnification is a precision engineering construction level of highest accuracy.
Features:
- Fixed point levelling
- Levelling in engineering work
- Area levelling, e.g. for melioration and for landscape design
- Levelling of profiles for layout of traffic routes and lines
- Transfer of heights, setting out and check measurements in civil engineering
- Tacheometric levelling
Quick pointing and reading
By means of the sliding clutch and endless antagonistic spring control, which can be operated from both sides, the levelling instruments can be quickly aligned to the rod. The coarse-fine-focusing speeds up the focusing process with simultaneous improvement of the sensitiveness. For better distinction from the horizontal reticule line the stadia lines are short broken lines.
Compensator
The FG-020 is equipped with a compensator which is sturdy and extremely insensitive to shocks and which makes the precision levelling of the head within parts of a second. The extended working range of the compensator allows a larger scale for re-levelling. Therefore the FG-020 is quickly ready for measurement.
Circular level
Correct reading with respect to height and side with comfortable arrangement close to the ocular.
Horizontal circle with right and left-handed numbering
The FG-020 is equipped optionally with a glass circle or with a mechanic circle. For directional setting-out the circle is numbered right and left-handed. The glass circle can be set by means of the circle drive: the mechanical circle can be set by means of a knurled ring.
Instrument body
The waterproof design, solid body construction and rugged compensator ensure reliable and precise elevation measurement under the most adverse conditions.
Telescope
The Telescope provides erect and unreversed image viewing. The instrument is easy and comfortable to use with the convenient location of the focus and lateral drive knobs. The optical sighting device allows quick acquisition of the rod target.
| Technical data | |
| Measuring accuracy | |
| Mean square error per 1km double levelling | +/- 1.5mm |
| with plan parallel micrometer | +/- 0.7mm |
| Telescope | |
| Image position | erect and true to side |
| Magnification | 31x |
| Free objective diameter | 37.5mm |
| Shortest target distance | 0.7m |
| Multiplication constant | 100 |
| Compensator | |
| Working range | +/- 15' |
| Mean square setting error | +/- 0.5" |
| Setting time | < 1 s |
| Circular level | 25' |
| Circle | |
| Interval of the circle | 1 gon (1°) |
| Estimability of reading | 0.1 gon (10') |
| Temperature | |
| Operating range | -25°C...+45°C |
| Instrument | |
| Dimensions | 230x120x150mm |
| Weight | 2.0kg |
| Case | |
| Dimensions | 350x180x290mm |
| Weight | 3.0kg |
Protective Case
The instrument is well protected in its durable shock-resistant closed cell foam lined case with secure latches. In the case are other small accessories including a rain cover.
Optional Accessories
Parallel-plate 5 or 10mm micrometer, invar level rods and a very unique and complete industrial staff set in a hardwood case. Also available are heavy-duty trivet for low set-ups and a universal wall/column mount for use when a tripod is inappropriate.
