VTSYIQI Digital Concrete Rebound Hammer Concrete Hammer Tester with Stiffness of Spring 785±30.0N/m Pointer Length 20.0±0.2mm Test Range 10-60MPa Pointer Friction 0.65±0.15N USB Communication Port OLED Display

1.1 Composition

The component list of digital rebound test hammer mainly includes 1 Mechanical rebound test hammer, 1 electronic detection system, 1 charger, 1 Micro USB data cable, 1 USB flash disk and 1 product operation manual.

1.2 Technical Parameter

· Nominal kinetic energy: 2.207J

· Stiffness of spring: 785 ± 30.0N/m

· Pointer length: 20.0 ± 0.2mm • Pointer friction: 0.65 ± 0.15N

· Spherical radius of impact rod: R25 ± 1.0mm

· Working length of spring striking tension spring: 61.5 ± 0.3mm

· Tensile length of spring striking tension spring: 75.0 ± 0.3 mm

· Rated value of steel anvil: 80 ± 2

· Consistency of detection indication: ≤± 1

· Operating temperature: - 4 ℃ ~ + 40 ℃

· Communication rate: 115200bps

· Display: 2.08-inch 256x64 (dot matrix) OLED display

· Power supply: 1800mAh, 3.7V lithium ion battery

· Working hours: continuous working ≥ 10 hours

· Test range: 10-60MPa

1.3 Features:

• real-time measurement point strength estimation, and automatically calculate the measurement area strength and component estimated strength after sampling

• Small size, modular design, easy to replace the mechanical rebound test hammer

• Built in large capacity rechargeable lithium ion battery, long service life of the test hammer

• Built in large capacity memory can store 999 standard components, and a single component can set up 99 measuring areas and 159840 measuring point data at most

• Support break-point continuous test, and data collection is more convenient and humanized

• Support voice counting, measurement area conversion and component completion voice reminder

• Through data line connection and computer data processing software, the test data can be processed quickly and the test report can be issued