Laser marking instrument laser marking instrument (4V1H1D) laser marking series of products, based on its auto-leveling, simple, economical and practical features vertical collimator precision, is widely used in interior decoration, installation of doors, windows and cabinets, ceiling, wall charts and other professional and DIY markets, to provide horizontal and vertical alignment. Features: 5 line lasers and plumb before 1:00 the next laser, 2 cross line laser continuous or pulsed laser, indoor and outdoor use either automatic Anping, over-range alarm alarm function can be shielded vertical collimator, 360 ° tilt at any angle using the rotation of the body Technical Specifications: Laser wavelength: 635nm Laser class: ClassII laser accuracy: ± 1mm ??/ 5m Anping range: ± 3 ° Working temperature: -10 ℃ ~ + 45 ° C Power: 4 5 # battery (or external power supply DC6V) low pressure tips : Power LED flashes Size: Φ100 × 216mm Weight: 1.22Kg ■ integrated body, monochrome laser high brightness, stable performance ■ Laser point under automatic delay off ■ with removable filter, the human eye ■ through telescopes semiconductor lasers, small size, light weight, resistant to vibration, the instrument has a long life ■ dial so that a more accurate measurement and calibration ■ mounted on the rear zone plate down device manufacturers can produce red at the destination crosshair, when measurement is more accurate and convenient to use laser vertical collimator because of geological compass magnetic north and south poles position south, north and geographic poles are not entirely consistent, that is the magnetic meridian and geographical meridian not coincide, any point on the Earth magnetic north to true north direction is inconsistent with that point precision vertical collimator, the angle between the two directions is called magnetic declination. East of the northern tip of the needle at a point on the earth somewhat north direction is called the East side, west side, said the West are somewhat biased. East bias is (+) Western bias is (-). Declination around the planet known magnetic declination is calculated periodically if certain point, the relationship is a test line of magnetic azimuth A magnetic and true north azimuth A is A equals A magnetic declination subtraction. Application of this principle can be magnetic declination correction, may compass scale rotating spiral when the correction of the horizontal dial left or turn right (east side of the magnetic declination is right, Western bias to the left) that compass north and south between the chassis and the horizontal scale line connection dial 0--180 degree angle equal to the declination. After reading measurement correction would be true azimuth. The desired product is measured azimuth measuring the relative positional relationship between the desired product and those measured, the desired product is measured azimuth (azimuth angle refers to an angle clockwise from the meridian line of the survey). Precision laser vertical collimator | vertical collimator | Jinke instrument provided by the Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) strong, credible, in Qingdao, Shandong analytical instruments industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinke instrument into the brilliant and you work for a better future!