Product Applications: DZJ-300A can be widely used in building 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 dot laser ◆ vertical quasi visible through a telescope eyepiece can be directly observed clearly visible laser surveying instruments offer, no harm to the eyes. Laser pointing effective distance of 100 meters. ◆ machine professional waterproof dustproof and waterproof design, completely avoid the rain caused by moisture inside the instrument surveying instruments monopoly, the whole dust and waterproof rating to IP54 ◆ Optional laser plummet standard preparation for the optical plummet, optional Laser plummet. Detection, 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 surveying instruments, excluding the three maximum and three minimum, then the value of the remaining 10 rebound average. 2. Rebound non-member non-horizontal direction and measuring surface, the angle should be more positive, more positive after a rebound value then pouring surface is relatively positive. 3. The value of the survey area carbonation depth and resilience values ??more positive after the isolated strength of concrete in terms of the value of each measuring area. 4, when the measured intensity values ??district structures or members appear less than 10.0MPa, take fcu, e <10.0MPa. fcu, min 5, when the measured area structure or member number is less than 10 when, fcu, e = 6, when the number of the surveyed area structure or component is not less than 10 or by granting detection fcu, e = fcu surveying instruments factories, m-1.645 * s 7, when one of the following occurs survey area by concrete strength member batch testing when standard deviation, should all be detected by a single member: ① the mean compressive strength of concrete is less than 25.0MPa, S> 4.50Mpa; ② concrete average compressive strength of not less than 25.0MPa and not more than 60MPa, S> 5.50Mpa wholesale surveying instruments, surveying instruments, Jinke instrumentation provided by Instrument Co., Ltd. Qingdao Branch. Instrument Co., Ltd. Qingdao Branch (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 instrumentation and you work into the brilliant, for a better future!