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Description
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Specification
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Ordering
The concrete test hammer is an instrument which is easy to use, for quick and approximate measurement of the resistance to pressure of manufactured concrete products. The principles on which it works are based on the rebound impact of a hammer on a piston which rests against the surface of the concrete products. The greater the resistance of the concrete, greater is the rebounded impact. By reading this rebound impact on a scale and relating it to curves on graphs supplied with the instrument, the resistance to compression in mpa or psi can be found, with +/-20% of actual.
Normal Concrete Hammer:
- Impact energy: 2.207 Nm
- Measuring strength range: 10 to 70 N/mm²
- Static friction of pointer slider: 0.65±0.15N
- The rebound values calibrated on steel anvil: 80±2
- Free length of strike tension spring: 75±0.3 mm
- Spherical radius of strike rod: 25±1 mm
- Dimensions: Dia. 54×278 mm
- Gross weight approx.: 1.7 Kg
- Overall size: 330*200*75mm\
Digital Concrete Test Hammer:
- Impact energy: 0.225kgm (2.207J±0.100J)
- Rigidity of recoiling tension spring: 785±30.0N/m
- Length of pointer: 20.0±0.2mm
- Friction of pointer: 0.65±0.15n
- Spherical radius of recoiling rod: R25±1.0
- Active length of recoiling tension spring: 61.5±0.3mm
- Impact length of recoiling rod: 75.0±0.3 mm
- Calibration value on steel anvil: 80±2
- Consistency of test indicating value: ≦±1
- Operating Temperature: -4ºC-+40ºC
- Display screen: high-light blue OLED display screen
- Resolution: 256X64
- Types of sensor: non-contact optical coupler type sensor
- ND 0101-1: Normal Concrete Test Hammer
- ND 0101-2: Digital Concrete Test Hammer