SINO AGE DEVELOPMENT TECHNOLOGY, LTD.
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Integrated Digital Schmidt Hammer HT-225D with optional microprinter
Introduction
HT-225D is is specifically applicable to the on-site quality sampling inspection by Engineering Quality Supervision Institutions and Supervising Units, for the compressive strength test result of the inspected concrete structure can be got immediately; when the Construction Quality Testing Institution carries out on-site test for real construction objects, it can further reflect the fairness, scientificity and accuracy of the test, greatly improving the working efficiency of testing, data processing and inspection report formation.
Structure of Concrete Test Hammer
The Concrete Test Hammer is mainly composed of flip system, value-indicating system and shell component．Its structure is shown in Fig．1． The diagram shows the state that the impact hammer has finished impact in the test and the pushbutton has locked the movement,ie．retaining state of resilience value．
Key features
High contrast OLED display
All setup can be made on site
Automatic calculating compressive strength
Automatic correction of impact direction
All data will be stored in memory
All data can be transferred to PC by USB cable or blue tooth(optional)
Dual display for analogue ruler and digital value
Specifications
| Model | HT-225D | HT-75D | HT-20D |
| Display | OLED digital | ||
| Measuring range | 10-100N/mm2 | 1-25N/mm2 | |
| Accuracy | ±0.1R | ||
| Impact energy | 0.225kgm (2.207Nm)for testing ordinary building and bridge construction | 0.075kgm (0.735Nm)for testing small and impact-sensitive parts of concrete or artificial brick | 0.020kgm (0.196Nm)for testing mortal or clay of products |
| Communication | USB2.0 or Bluetooth(optional) | ||
| Storage | data for 4000 concrete structures | ||
| Operating temperature | -40º-60ºC | ||
| Power supply | 3.7V Li-ion rechargeable battery charged via USB port | ||
| Dimension (mm) | 280x75x60 | ||
| Net weight | 1.1kg | ||
Specification
.Mechanical Index of Rebound Apparatus
Metrological verification specifications : Verification Regulations of Rebound Apparatus(JJG_817-2011)
Impact energy : 0.225kgm (2.207J±0.100J), for testing ordinary building and bridge construction
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
Initial bouncing position of recoiling hammer : graduated scale“0”+1
Calibration value on steel anvil : 80±2
Graduating position “100” of shell calibration: overlap with the side of positioning gap of calibrator cover plate of the rebound apparatus.
Consistency of test indicating value : ≦±1
Operating Temperature : -4ºC-+40ºC