Levling

Leveling is dione with the help of the ball-and-socket arrangement provided on the top of the tripod stand. This arangment is loosened and the box is placed in such a way that the graduated ring rotates freely without touching either the bottom of the box or the glass cover on top. The prism moved up and down till the figures on the graduated ring are seen sharp and clear. Technical Data used in the field explained in civil surveyor course in rawalpindi. Then the prismatic compass is held by the left hand and placed over the threaded top of the stand.

Normally the compass is centered by dropping a piece of stone from the bottom of the compass box. Centering may also be done with there aid of a plumb bob held centrally bellow the compass box. A rider of brass or silver coils is provided with the needle to counterbalance its dip. Some more details of civil surveyor course in rawalpindi are as under.The sight vane and the reflecting prism are fixed diametrically opposite to the box.

The red glass is meant for sighting luminous objects at night and the blue glass for reducing the strain on the observer’s eye in bright daylight. When a magnetic needle is suspended freely and balanced properly, unaffected by magnetic substances, it indicates a direction. This direction is known as the ‘magnetic meridian’. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join civil surveyor course in islamabad.

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