Harbin Optical Instrument Factory Dqy-1 Geological Compass/65mm
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Harbin Optical Instrument Factory Dqy-1 Geological Compass/65mm:
QUICKLY FIND MESEARCH: nizi.meParameter The vial angle value: 15 '± 5' / 2mm
Circular level angle value: 30 '± 5' / 2mm
Goniometer readings: ≤ 0.5 °
Dial lattice value: 1 °
Size: 80 × 70 × 35 (mm)
Note (1) Needle and thimble, agate bearings is the most important parts of the instrument should be carefully protected and kept clean so as not to affect the sensitivity of the magnetic needle. When not in use, should the instrument be secured. Instrument closed, the needle through the action of the switch and lever up automatically, so that the thimble and agate bearing out, to avoid worn thimble. (2) All hinge is not easily removable, so as not to loose and affect the accuracy. (3) The instrument to avoid the high temperature exposure, to avoid blisters leak failure. (4) Hinge rotating part should always be some watch oil to avoid dry grinding and broken. (5) A long time when not in use, should be placed in ventilated, dry place to prevent mildew.
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