Name: suction basin car compass north needle
brand: xin xin
color: Picture color (as shown in the picture)
material: acrylic
note: the color of the product you see varies depending on the display. There will be slight errors in product size due to measurement problems. Please indulgence!

[Product model]: LC287-6
[Product weight]: 13g (excluding packaging)
[Product size]: height 4.3 * black seat 3.6 * ball diameter 28cm (cover size)
[Product material]: acrylic
[Packaging method]: OPP packaging
[Packing information]: 1200 pieces per box
[Product color]: (as shown in the figure)

[Use]]
meaning of scale numbers on stainless steel compass:
south is 180
north is 0 (or 360)
east is 90
"West" is 270
the letters of the alphabet meaning:
east E
west W
south S
north N
NE northeast, SE southeast, SW southwest, NW Northwest
the red arrow points to the South
turn the compass, when the pointer is stable, the red end points North forever, and then gently turn the compass to make the letter "N" coincide with the Red Arrow (pointing to the same), then the direction corresponding to other letters on the compass is the actual orientation, so that you can distinguish between east, west, north and south, and then you can also determine the angle between any direction and the North or other directions, it can be read on the dial.
[Use]]

step 1: place the compass horizontally. After the compass is still, the red section pointing to the geographical direction is "south"
step 2: turn the compass slowly until the red end coincides with the "south" of the scale
step 3: The direction marked by the dial is the actual geographical direction.
Note: Magnet and iron objects will affect the accuracy of Compass. Please do not use the compass near magnet (such as Speaker) or iron (cutter, etc.).

[Maintenance and maintenance]]

1. Do not approach ferromagnetic objects, high-voltage wires and electromagnetic devices when using and placing the north pointer
parts, etc., in order to avoid errors and reduce the sensitivity of the compass.
2. When not in use, put it in a ventilated and dry place to avoid mildew.
3. When each surface is sticky, use white flannel to gently wipe the surface to keep the surface bright and clean.
[About Compass]]

compass is a simple instrument used to distinguish orientation. The predecessor of compass is Sinan, one of the the four ancient Chinese inventions. The main component is a magnetic needle which can rotate freely on the shaft. Under the action of geomagnetic field, the magnetic needle can keep on the tangent direction of magnetic meridian. The north pole of the magnetic needle points to the north pole of the geography, which can be used to identify the direction. It is often used in navigation, Geodetic Survey, travel, military and other aspects.
The Earth is a large magnet with south magnetic pole near the geographic North Pole and North Magnetic Pole near South geographical pole.
The compass is affected by the magnetic field force in the Earth's magnetic field, so it will guide one end and point to the north. Compass-people pay attention to the activities of the sun in history, which is called
the Northern Compass -- the northern hemisphere region is relatively close to the magnetic North Pole, and professional mapping needs to consider the declination (magnetic declination) between the geographic North Pole and the magnetic North Pole, so now most of them are called the Northern Compass. Both are one thing.
The compass must be held horizontally. In order to avoid magnetic needle disorder, it should keep a certain distance from barbed wire, high-voltage wire, cars and airplanes and objects containing magnetism.

[Compass knowledge extract]]

compass refers to South geographical pole, that is, North Magnetic Pole compass is a simple instrument used to distinguish orientation.
The predecessor of compass is Sinan, one of the the four ancient Chinese inventions.
The main component is a magnetic needle which can rotate freely on the shaft.
Under the action of geomagnetic field, the magnetic needle can keep on the tangent direction of magnetic meridian.
The north pole of the magnetic needle points to the south pole of geography, and the direction can be distinguished by using this property.
It is often used in navigation, Geodetic Survey, travel, military and other aspects.
The invention of Compass is the result of our working people's understanding of object magnetism in long-term practice. Due to the productive labor, people came into contact with the magnetic ore and began to understand the magnetic properties. People first discovered the nature of magnet-induced iron. Later, the directivity of magnet was found. After many experiments and researches,
finally invented a practical compass.

Principle of compass indicating direction

the Earth is a large magnet with south magnetic pole near the geographic North Pole and North Magnetic Pole near South geographical pole. Compass is subject to magnetic field force in the Earth's magnetic field
therefore, one end of the guide points to the north.

[Operation]]

1. The measured azimuth
unfold the compass, rotate the azimuth frame so that the scale on the azimuth glass is relatively positive with the direction index, and place the flat sight mirror obliquely (45 degrees) in one eye to the target through the sight, from the flat sight glass, we can see the azimuth division on the counter-shaped Watch Plate of magnetic needle North Pole, which can not only read the target and azimuth angle, but also turn the azimuth frame with the right hand to align the scale line on the azimuth glass with the magnetic needle North Pole, at this time, the angle between the direction index and the azimuth glass scale line is the target direction angle (calculated clockwise).
Open the north pointer, mark the map (do not calibrate the map when measuring distance), insert a needle at the datum point on the map, turn the north pointer to make the measuring ruler edge cut to the target point, and then judge the azimuth angle from the datum point to the target point.
2. The calibration map
unfold the compass, rotate the azimuth frame, align the scale line words on the azimuth frame with the direction Index (pay attention to the correction of magnetic declination angle), place the North pointer flat on the map, and one end of the quasi-star faces the north pole of the map, make the coordinate ladder length tangent to the map magnetic meridian, rotate the map to make the magnetic needle North Pole align with the scale line on the azimuth glass, and then the map has been calibrated.

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Xinxin Optics Co., Ltd. is a professional manufacturer of magnifying glass, microscope, compass, telescope, thermometer and other products production and trade

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