Hand-held laser rangefinder LDM-65 Measuring range 0.05-65 m 0.05-70 m Accuracy ± 1.5 ± 1.5 millimeter measurements 毫米 meters, inches, feet, meters, inches, feet, measuring 20 Group 20 Group History biggest Laser class II Output power <1mW II Maximum output power <1mW protection IP54 dust and waterproof rating IP54 dust and waterproof rating Operating temperature 0 ℃ ~ 40 ℃ 0 ℃ ~ 40 ℃ Storage temperature -10 ℃ ~ 60 ℃ -10 ℃ ~ 60 ℃ Dimensions 115 * 48 * 28mm 115 * 48 * 28mm Weight 135 grams 135 grams is detected, Hammer should always be perpendicular to the axis of the detection surface of concrete structures or components, slow pressure, accurate readings quickly reset. Presumption of concrete strength: 1, from 16 rebound values ??measured in the area, excluding the three maximum and three minimum, then the remaining 10 rebound values ??averaged. 2, as the rebound and non-member non-horizontal test surface, the angle should be more positive mapping equipment, rebound value more positive again after pouring more positive side. 3. The value of the survey area carbonation depth and resilience values ??more positive after the isolated strength concrete conversion value of the measuring area. 4, when the measured intensity values ??of structure or component area appeared less than 10.0MPa, take fcu, e <10.0MPa. fcu, min 5, when the number of the surveyed area structure or component is less than 10, fcu, e = 6, when the number of structures or components of the survey area is not less than 10 or by batch detection fcu, e = fcu mapping equipment calibration , m-1.645 * s 7, when one of the following occurs by measuring the strength of concrete members area standard deviation batch testing, should all by a single component detection: ① concrete compressive strength less than the average of 25.0MPa, S> 4.50Mpa; ② compressive strength of concrete is not less than the average of not more than 60MPa 25.0MPa mapping equipment types, S> 5.50Mpa Laser Level Application: DZJ-300A can be widely used in construction, engineering, installation, project supervision, deformation observation. Such as: high-rise buildings, elevators, mines, water towers, chimneys, installation of large equipment, aircraft manufacturing, shipbuilding and other industries. Features: ◆ outgoing laser brightness can be adjusted depending on the usage environment can adjust the brightness of the laser spot ◆ vertical quasi visible through a telescope eyepiece laser can be directly observed clearly visible laser, no harm to the eyes. Laser point to the effective distance of 100 meters. ◆ machine dustproof and waterproof waterproof design professional surveying and mapping instrument calibration, completely avoid the rain caused by moisture inside the instrument, the whole dust and waterproof rating to IP54 ◆ Optional laser plummet Standard preparation for the optical plummet, optional laser plummet. Mapping equipment manufacturing, Jinke instrumentation (certified), surveying instruments provided by the Instrument Co., Ltd. Qingdao Branch. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) is Qingdao, a leader in analytical instruments, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Branch of the Instrument in leadership with the staff warmly welcome all inquiries negotiations to create Branch instrumentation a better future.