ZK-450J/550J Digital High Strength Rebound Tester

ZK-450J/550J Digital High Strength Rebound Tester Application Industry

Used for the compressive strength of concrete in high-rise building components, bridges, and concrete components (slabs, beams, columns, bridges) in structural engineering. It is usually suitable for concrete structures or components with a strength of 50-90MPa

Features

Laser detection module, contactless, frictionless, long service life, high accuracy;

Built in Bluetooth chip, can connect to mobile app to upload rebound data in real time

Optional Bluetooth printer, on-site printing of original records and test results

2.8-inch touch LCD screen, diversified input methods, simple interface, easy to operate

Support remote upgrades, synchronize industry standard updates with curves, and can be customized exclusively for users;

One on one analysis software for PC, easy to process data result analysis and generate detection reports

According to the standard

GB/T 9138-2015 "Rebound Tester"

JJG 817-2011 "Rebound Tester" Verification Regulation

JGJT 294-2013 "Technical Specification for Strength Testing of High Strength Concrete"

Technical Indicators

Collection Instrument

Input Method: Touch, Button

Input Method: Chinese, English

Data Processing: Automatic data correction, calculation, statistical analysis according to specifications

Display Method: 2.8-inch touch LCD screen (400 × 240 pixels)

System Capacity: 1000 Component, with a large measurement area of 100

Power supply: rechargeable, built-in 3200mAh high-capacity lithium battery

Automatic shutdown: adjustable for up to 120min

Mechanical rebound tester

Product model: HT-450J； HT-550J

Sensor lifespan: over 200000 cycles

Strength measurement range: 50~100MPa

Nominal kinetic energy: 4.5J; 5.5J

Elastic impact tension spring stiffness: 900 ± 40N/m; 1100 ± 50N/m

Impact hammer stroke: 100 ± 0.3mm; 86 ± 0.3mm

Pointer friction force: 0.65 ± 0.15N

Elastic impact tension spring tension length: 100 ± 0.5mm

Elastic impact tension spring working length: 106 ± 0.5mm; 86 ± 0.5mm

Spherical radius at the end of the impact rod: 35 ± 1.0mm; 18 ± 1.0mm

Indication consistency error: ≤± 1 (difference between mechanical rebound gauge pointer reading and instrument screen reading)

Steel drill calibration rebound value: 88 ± 2; 83 ± 2

Industry and some local regulations for strength testing compressive strength range:

Industry standard: 20-110MPa, Chongqing standard: 50-80MPa

Industry standard: 60-80MPa, Fujian standard: 60-90MPa