This instrument is suitable for measuring all types of geotextile products effective aperture, its performance in line with GB / T17634-1998 "geotextiles and related products measured effective aperture - wet sieve method" standard requirements for instruments. Two, geotextile effective aperture detector test principle: not to add a single layer of geotextile tension and its related product samples as screen, under the provisions of the vibration frequency and amplitude of the sample and graded granular material spray so that particle size distribution through the sample material. To a specific particle size by the particulate material and the effective pore size of said samples. Three, geosynthetics equivalent aperture tester technical parameters: 1, holder inside diameter: Φ176mm 2, vibration frequency: 50Hz 3, the vibration amplitude:. 1 5mm (vibration height 3mm) 4, time setting: two stages 0 . ~ 99 99s 0 ~ 99 min 59s 5, matching motor: 2800r / min 550W 6, Power:? 380V, Dimensions: 680 × 420 × 750mm 8, Weight: 50Kg four, geotextiles equivalent aperture detector structure and working Principle: 1, the instrument by the portion of the base, cover, holder and screening devices, spray morpholino system components installed bottom corners open slots available bolt fixed on the basis of the workpiece or table, cover top left corner of the control area equipped with counters. power switch, start button. Vibration and screening devices do not cover direct contact, reducing vibration. Sprinkler system installed on the bottom right side of the pillar, from the inlet, steam switch, metal hose. Showerhead composition, with a splash on the shower head, shower place when used in the transparent cover, cover with splash cover, and fasten the clip to prevent water spillage. Collection tank with vibrating head rigid connection, the left has a collection tube, collecting support mesh bottom paired sample tile in the mesh. The holder will be pressed with, and then flip cover bolt clamping bolts and Kai. Flip the cover bolts and bolts Kai specific methods of operation: As required to collect seepage water tank and holder between its outer ring is installed, so there are two cover bolts Kai mouth open with a long trough, when holding When the device is difficult to remove, you can use Kai cap bolts reverse rotation, will increase from its bayonet holder for easy operation. ?, Transmission: one by the attached concrete vibrator eccentric gear driven by a belt to drive the vibration of the head to rotate a certain amplitude vibration frequency and vibration. All drive components mounted on a flat, level pull through four spring damping and the bottom column support. Head and plate vibration damping spring column coupling is also used to reduce the effects of vibration on the instrument. Fifth, the external environment: 1, table smooth, stable, and good vibration resistance. 2, with a more sensitive instrument vibration isolation. 3, temperature 10 ~ 30 ℃ Humidity ≤80% 4, Power: Ac380V ± 10% 50Hz 5, an external water supply must be regulated (suggested under 300KPa pressure flow 500mL / min)