Construction and performance:
- position measuring mechanism:By the compass, according to the door with the front sight and so on. Partition of the outer ring of bearing 360 ° partition system, the minimum grid value 2 °; inner ring of 60-00 mils system partition, the minimum value of 0-20 mils grid. Mil and degree of conversion table.
Accuracy: ± 0-10 mils ± 1 ° - from the assessed device:
According to the door and the front sight and so on. Front sight with two cutting-edge center edge angle of the door according to 1-00 mils, between the two cutting-edge length 12.34 mm, according to the door and the front sight between the length of 123.4 mm, which assessed the composition 10:1 ratio ranging device.
Measurement accuracy of 5% - tilt angle measurement agencies:
Card table by the pitch, pitch swing, flat mirrors, etc., whose range is ± 90 °.
Accuracy ± 2.5 ° - -foot ladder coordinates:
By the perpendicular side of one foot in length and composed of both sides of the short foot, foot length 120 mm.
Accuracy: ± 0.5mm