TDR2-S concrete slab tester
The TDR2-S is a rugged and lightweight system by James Fisher Testing Services used to assess the condition and support of concrete flooring slabs.
The TDR2-S unit uses solid state memory with a user friendly menu system that is easy to navigate for a rapid display of data in an easy to comprehend format. Data is then transferred to the systems TPAP Windows based, analysis software through a USB interface.
Built for security and speed of operation the unit is housed in a tough ABS plastic casing with high quality waterproof connectors, and a handy carry pouch is supplied as standard.
Download the TDR2-S product data sheet
Benefits of the TDR2-S concrete slab integrity tester:
- Rapid mapping of subsurface voids and areas of delamination
- On-site analysis of concrete slab stiffness
- Software for calculating stiffness and mean mobility of slab
- Operates for up to 8 hours on full charge
- Storage for over 700 results
- James Fisher Testing Services' complete test service available
All of our equipment is supplied fully calibrated to UK national standards.
| TDR2-S system specifications | |
| TDR2-Slab unit | |
|---|---|
| Features |
Twin channel hand held spectrum analyser |
| Keypad | Sealed colour coded and full alphanumeric keypad, tactile and audio feedback |
| Operating temperature | 0°C to +50°C |
| Display | Monochrome LCD transflective with backlight Contrast keypad adjustable Display area 122mm x 70mm Protective anti-reflective glass |
| Acquisition | 2 channel, 16 bit acquisition at 25KHz sample rate Pre-trigger on both channels, auto-ranging gain feature |
| Frequency range | 0Hz to 5000Hz |
| Storage | 700+ results, 3 data sets per test with full header information including site, test no, operator, transducers and date/time stamp |
| Displays | Velocity v time Force v time Force v frequency Mobility v frequency |
| Accuracy - black tip | Frequency: 0-1000Hz ±0.5% Mobility: 20-800Hz ±15% Mobility: 800-1000Hz ±50% |
| Power | Battery: 1.2V NiMH rechargeable AA cells Auto power off and battery indicator |
| Battery life | 8 hours + operation on full charge |
| Charge time | Approx 6 hours |
| Charging | External wall plug-in charger for 100/110/250VAC inputs (trickle charge) External cigar plug-in charger 12VDC inputs (fast charge) |
| Dimensions | L 21mm x W 187mm x D 55mm |
| Weight | 1.35Kg |
| Impulse hammer | |
| Type | Constant current load cell |
| Weight | 1.2Kg with fibre glass shaft |
| Nominal output | 0.15 volts/N8 hours |
| Frequency range | 0-1000Hz (black tip) 500-5000Hz (aluminium tip) |
| Range | 0-10000N |
| Geophone | |
| Type | Vertical SM-6 |
| Natural frequency | 4.5Hz |
| Nominal output | 30 volts/m/sec |
| Operating temperature | -30oC to +60oC |
The TPAP-slab software provides an easy to navigate platform for analysing results and reporting.
Slab tests are tabulated and automatically sorted into numerical order, from which test results can be directly accessed. All data can be exported in ASCII format for further analysis and contour plotting.
This frequency response method is based on measuring the harmonic response of a slab to a point of impulse of known magnitude. The mobility of the slab at low frequency and the general form of the response is a direct function of slab support and integrity.
The TDR2-S system excites the slab with a known impulse and measures the response with a velocity transducer.
The signals are processed using a fast fourier transform and analysed for dynamic stiffness and mean mobility. The results can then be mapped out to locate voiding or poor support.