Does Luoyang have a compass?

Basic criteria for choosing a geomantic compass: \ r \ Geomantic compass is the main geomantic tool for geomantic masters to seek dragons and acupoints, absorb sand and water, and arrange vertically. The quality of tools is related to the accuracy of position measurement and directly affects the accuracy of vertical layout. Therefore, feng shui masters are very picky about compasses. To be a good Feng Shui compass, you must know what kind of Feng Shui compass can be used in practice. \ r \ The compass consists of three parts: the seabed, the inner disk and the outer disk, and the quality of the three parts is closely related to the measurement accuracy of the compass. \r\nCompare the seabed: \r\n 1. The circular box on the seabed should be a standard cylinder, and the positioning reticle on the seabed should be orthogonal, that is, at a 90-degree angle. \r\n 2。 Casing shall be fixed at the intersection of submarine crosshairs and perpendicular to the seabed. The tip of the thimble should not be damaged. If the needle tip is damaged, the rotation of the magnetic needle will be slow and inflexible, thus affecting the accuracy of the pointer. \r\n 3。 The magnetic needle must be straight without bending or warping; Have enough magnetism; The weight of both ends of the magnetic needle should be the same. \r\n 4。 The seabed covering is preferably made of glass. The cover made of plexiglass or plastic is easy to generate static electricity, which will attract the magnetic needle and affect the measurement accuracy. \r\n 5。 When the glass cover is covered, turn the seabed over, and the magnetic needle should not fall off. When placing the inner plate on the seabed, special attention should be paid to the alignment between the north of the seabed line and the center of the inner plate. \r\nCompare internal disks: \r\n 1. The contents of each layer on the inner disk are the main parts of the geomantic compass, and the disk surface is required to be flat, accurate and clear. \r\n 2。 The meridian of the Twenty-four Mountain on site should coincide with Sunday at 360 degrees 0 degrees, 180 degrees, 90 degrees and 270 degrees respectively, and other plates should be set according to the standard of professional geomantic compass, so that they are in their proper positions. \r\n 3。 The inner and outer circles of the inner disk must be standard. After the outer disk is put in, the gap between the inner disk and the outer disk should be kept within a suitable range. The gap is too small, the rotation is not flexible, and the gap is too large, which affects the measurement accuracy. \r\n 4。 The inner ring should be a little tighter so as to keep the seabed fixed. The center of the inner disk should be concentric with the seabed. \r\nCompare external disks: \r\n 1. The outer disk must be a standard square with four sides not bent or skewed, and the center of the circular groove for placing the inner disk should be in the geometric center of the outer disk. \r\n 2。 The entire surface of the compass should be smooth and free from warping. \r\n 3。 The Ten Classics of Tianxin is the indicator line for reading the contents of each layer on the inner disk, and the four threading holes must be located at the center points of the four sides of the outer disk respectively. \r\n 4。 For a compass with leveling bubbles, when the bubbles of both leveling bubbles are in the center, the magnetic needle on the seabed should be parallel to the disk surface. The quality of compasses sold in the market varies from place to place. When buying a compass, you can choose according to the requirements detailed above.