Advanced design and technology plus 25 years of geotechnical expertise have produced the dataTaker DT80G GeoLogger – A versatile, powerful – yet low power & cost effective data logger.
It support vibrating wire and other geotechnical sensors such as Slope Indicator, RST Instruments, Geokon, Soil Instruments, Roctest, AGI – Applied Geomechanics Inc. DT80G is also capable to test sensor integrity through audible frequency
With temperature compensation (thermistor), 5 analog channels are capable to read up to 5 vibrating wire sensors. If temperature compensation is not required this logger can read up to 15 vibrating wire sensors.
Further expansion up to 100 sensors (with temperature compensation) or 300 sensors(without temperature compensation) is possible.
With the standard unit able to store up to 10 million data points (expandable) you can log as much or as little as you need. Overwrite or stop logging once allocated memory is full,archive data on alarm event, copy to USB memory or transfer via FTP/ Email, the choice is yours.
Communications features include RS232, USB and Ethernet, connect to the DT80G locally, remotely through a modem or over the Internet. The web interface allows users to configure the DT80G, access logged data and see current measurements as mimics or in a list using a web browser.
FTP/ Email provides data to your office over the internet or wireless network, without the need for polling or specific host software.
| Max Sampling rate (Hz) | 40 |
| Analog Inputs | 15 (2-wire common reference) 10 (2-wire isolated) 5 (3 and 4 wire isolated) |
| Analog Input Range | Voltage: ±30m,300m,3000m,50000mVDC Current: ±30mA Resistance: 1MΩ Frequency: 450kHz |
| Analog Voltage Accuracy | ±0.15 of Reading + (Full Scale Reading * 0.01%) |
| Effective Resolution | 18 bits |
| Analog Outputs | 1 |
| Analog Out Range | Voltage: 10m-10000mVDC Current: 0-24mA |
| Excitation | Analog Channel: selectable 2µA, 250µA or 2.5mA precision current source, 4.5V voltage source or switched external supply Switchable 12V/5 regulated power output (max 300mA) |
| Digital IO | 8 bi-directional channels |
| Counter | Low speed counters: 8 counters shared with digital inputs Dedicated counters: 4 high speed or 2 phase encoder |
| RS232/RS422/RS485 serial sensor port | 1 |
| RS232 host port | 1 |
| USB Port | 1 |
| Ethernet Port | 1 |
| Data Storage | 128MB (upgradeable to 2GB) |
| Vibrating Wire Supported | 128MB (upgradeable to 2GB) |
| Protocols Supported | Modbus, FTP, HTTP, XML, SMTP, NTP and SDI-12 |
| CEM20 Expansion Module supported | Yes |
| Power Requirements | 10-30 VDC |
| Internal Battery | 6Vdc 1.2Ah Lead Acid |
| Real Time Clock Accuracy | ± 1 min/year (0°C to 40°C) ± 4 min/year (–40°C to 70°C) |
| Dimensions(mm) | 180x137x65 |
| Weight | 1.5kg |
| Temperature Range | –45°C to 70°C |
| Warranty | 3 years |
The Central Market in Abu Dhabi is a huge construction project which is due for completion in 2011. It consists of three towers, the Residential Tower, the Commercial Tower and the Hotel Tower. The tallest will be the Residential Tower which will stand 381 metres tall with 88 floors. It is imperative that certain parameters identifying the structural integrity be monitored and logged during construction. The diaphragm walls also require monitoring during the construction period to ensure the safety of the people and equipment on-site…
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