Second, the prices of products sold in our store are all tax-free prices. Contact customer service if you need to issue an invoice!

Product Introduction:

[Product model]: K4580-Army green the price of products in our store is 1 yuan for fans and colors.

[Product Specification]: 85*63 * 30mm

[Product weight]: 220g

[Product material]: zinc alloy

[Packing method]: Bubble Bag, cloth bag, color box

[Packing information]: 50 pieces/box. The prices of the products in our store are excluding tax. Contact customer service if you need to issue an invoice! 10 pieces in one package

structure and Performance: 1. Azimuthal survey mechanism: composed of Compass, illuminator and quasi-star. The outer circle of azimuth division is 360 ° division system, the minimum grid value is 2 °; The inner circle is 60-00 dense division system, and the minimum grid value is 0-20 dense. See table for the conversion of density and degree. Measurement accuracy: ± 0-10 secret positions the prices of products in our store are all tax-free prices. Contact customer service if you need to issue an invoice! ± 1 ° 2. Distance estimator: consists of illuminator and quasi-star. The angle between the two tips of the quasi-star and the central edge of the photo gate is 1-00 secret, the length between the two tips is 12.34mm, and the length between the photo gate and the quasi-star is 123.4mm, which is composed of 10:1 proportional ranging estimator. Measurement accuracy is 5%3. Pitch angle measuring mechanism: it consists of pitching plate, pitching pendulum, flat mirros, etc., and its range is ± 90 °. Measuring accuracy ± 2.5 ° 4. Coordinate ladder ruler: it consists of a long ruler on one side perpendicular to each other and a short ruler on both sides, and the ruler is 120mm long. Measurement accuracy: ± 0.5mm operation: 1. Azimuth measurement: expand compass, rotate the azimuth frame to make the scale line on the azimuth glass relatively positive with the direction index, and tilt the horizontal mirros (45 °) monocular to aim at the target through the quasi-star, from the flat mirros reflection, we can see the azimuth division of the magnetic needle N pole on the inverted word table board, which can not only read the target 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 N pole, at this time, the angle between the direction index and the azimuth glass scale line is the target azimuth angle. (Calculated clockwise). Open compass, calibrate the map (do not calibrate the map when measuring distance), insert a needle at the base point on the map, rotate compass, and cut the side ruler edge to the target point, the azimuth angle from the reference point to the target point can be determined. 2. Calibration map: expand compass, rotate the azimuth box, align the tick line on the azimuth box with the direction Index (pay attention to the correction of magnetic declination), and place the compass flat on the map, one end of the target star faces the north pole of the map, making the length of the coordinate ladder tangent to the map magnetic meridian line. Rotating the map makes the magnetic needle N pole align with the scale line on the azimuth glass. At this time, the map has been calibrated. 3. Seek the marching direction towards the masking target: expand the compass on the map, and make the mapping ruler pass through the map my foothold and marching target. At this time, the direction index refers to the direction of the moving. Rotate the azimuth frame to make the (S, N) direction on the azimuth glass consistent with the (S, N) direction on the map, and then record the azimuth reading indicated by the direction index, facing the direction indicator, pick up compass and rotate the body to align the magnetic needle N pole with the scale line on the azimuth glass. At this time, align forward through the quasi-star light door, All objects on this alignment line (such as Woods, houses, etc.) can be used as auxiliary targets in the marching direction, and they can move forward after recognizing the auxiliary targets. Close the compass into the bag, but do not turn the azimuth box. After reaching the auxiliary target, you can find a new auxiliary target and continue to move forward until the destination. Check the direction reading frequently along the way. 4. Knowing the interval of the target, estimate the distance between the target and the standing point: ① aim at the target through the left and right tips of the target, and according to the multiple of the width between the left and right tips of the target, estimate the distance of the target according to the ratio formula of 10:1. The distance between the target and the standing point (M) = the width of the target interval (M) x10/the multiple of the width of the two tips of the target: there is a road ahead parallel to our position, seek the distance between Highway and position. There are poles along the highway, and the distance between poles is 50 meters. The distance estimator is used to measure that there are 5 poles at the left and right tips, that is, the interval between each two poles accounts for 1/4 times of the distance between the left and right tips. Calculated according to the proportional formula: distance between Highway and position = 50x10x4=2000 the price of goods in our store is excluding tax. Contact customer service if you need to issue an invoice! M ② use auxiliary point to find the distance of the target and use the collimator to aim at the target, rotate the azimuth frame to make the scale line to the N pole of the positive magnetic needle, and record the azimuth reading indicated by the direction index. Then turn left or right in the direction of the straight angle (that is, 15-00 difference from the original azimuth reading) to find a auxiliary point, Use step test or other methods to measure the distance from the auxiliary point to the standing point. In auxiliary point, use compass to align the target with the target through the door alignment, and also rotate the azimuth frame to align the scale line with the magnetic needle N pole, and record the reading indicated by the direction index. According to the difference between the two direction angle readings before and after and the distance from standing point to auxiliary point, you can find range of target in Schedule 2. If the difference between the above two direction angle readings is 7-50 (that is, 45 °), the range of target is equal to the distance from the standing point to auxiliary point. 5. Measure the pitch angle: take the face down, aim at the target with the collimator, and reflect the pitch angle reading through the flat mirros; Or stand the face on a certain plane and measure the angle of inclination of the plane. 6. Measuring height: Use Map and altimeter to measure height. Find the horizontal distance from the standing point to the target on the map, then use compass to measure the pitch degree, and use altimeter to find out the height, which can also be calculated by trigonometric function. Example: Find the height from the bottom to the top of the mountain. Find out from the map that the horizontal distance between the top of the mountain and the standing point is 100 meters, and use compass to measure the elevation angle of the top of the mountain is 40 degrees, and then check the altimeter at 100 meters and control 40 degrees, the available height is 83.91 meters. 7. Mileage between any two points on the map: maps of different scales, the formula for calculating the relationship between the side length of the square lining and the field distance 1:25000 map: distance = (measured in millimeters/4)X100 (meters) 1:50000 map: Distance = (measured in millimeters/2) The prices of the products in our store are excluding tax. Contact customer service if you need to issue an invoice! The price of X100 products sold in our store is tax-free. Contact customer service if you need to issue an invoice! (M) 1:100000 map: distance = measured in millimeters the price of the products in our store is excluding tax. Contact customer service if you need to issue an invoice! X the prices of products sold in our store are excluding tax. Contact customer service if you need to issue an invoice! 100 The price of products in our store, (M) 8. Magnetic declination measurement: ① the orientation of the north-south magnetic pole of the earth is not exactly in the north-south direction of the earth, so magnetic needle refers to the north-south direction, and there is a deviation angle from the true north-south direction. This deviation angle is called magnetic declination angle, the values vary from place to place. When accurate measurement is not required, the direction indicated by magnetic needle can be regarded as the true north. When accurate measurement is required, check the local magnetic declination book first, and then according to the direction indicated by Compass, Calculate the true north-south direction. For example, when using compass in Changsha, check that the magnetic declination of Changsha in Schedule 4 is 2 ° 41 '(W), which means that in Changsha magnetic needle, the North is 2 ° 41' in the west of the North. ② the method of calculating the magnetic declination in any place. In the clear night, expand compass and turn the azimuth frame to make the (N) word on the azimuth glass face the direction indicator. With the light door, quasi-star, flat mirros and noctilucent sign Zhizheng to the North Star, the compass will be laid flat without changing the direction of Compass. At this time, the magnetic needle North pole refers to the magnetic declination of the location. Maintenance: 1. Do not approach ferromagnetic objects, high-voltage wires and electromagnetic devices when using and placing compass, so as not to cause errors and reduce the sensitivity of the compass. 2. When not in use, it should be placed in a ventilated and dry place to avoid mildew. 3. Flat mirros, do not twist the reverse word table seat, so as not to affect its use accuracy. 4. When each surface is sticky, white flannel can be used to gently wipe the surface to keep the surface bright and clean.

Features:

the damping oil plate design is adopted to make the product more stable; The product is fully sealed and waterproof; With a level meter, the accuracy is improved and the error is greatly reduced!