Description
The SOFO VII reading unit is a universal reading unit able to measure both SOFO (Interferometric) and MuST FBG (Fiber Bragg Grating) sensors.
The SOFO VII reading unit is a universal reading unit able to measure both SOFO (Interferometric) and MuST FBG (Fiber Bragg Grating) sen-sors. The system is designed for static, long-term measurements. Each channel can be software configured for one of the two technologies. The SOFO VII is integrated in a compact steel housing designed for perma-nent installation in any structure that requires continuous monitoring. The SOFO VII reading unit allows to measure 4 or 8 channels. On each channel it is possible to connect up to 5 SOFO sensors (external 1×5 splitter needed) and up to 25 MuST FBG sensors (depending on sensor type, see sensor datasheets for details). The unit contains a field PC that provides data logging and remote interfacing functionalities.
The main features of SOFO VII are: flexibility in the choice of the options allowing the customer to configure a system tailored to his needs in terms of sensing technology, data logging capability, communication and temperature range.
The SOFO VII has been designed for surface installation and for specific project requirements. The housing (IP 66, housing and door: e-coat primer, powder painted, RAL 7032 pebble grey) grants protection from water, rodents, accidental crashes and a key lock grants protection against vandalism.
SPECIFICATIONS
Performances
| SOFO Sensors Measurement | MuST FBG Sensor Measurement | |
| Measurement resolution: | 2 μm RMS | 1 pm |
| Linearity / Accuracy: | < 2 ‰ | ±2 pm |
| Sample rate: | 1 S/s (1Hz) | 1 S/s (1Hz) |
| Measurement range: | Max. 50 mm | 100 nm (1500 to 1600 nm) |
| Sensors per channel: | Max 5 SOFO Deformation sensors using optional 1×5 splitter | Max 7 MuST (FBG) Deformation sensors Up to 12 Strain FBG sensors Up to 25 Temperature FBG sensors |
| Calibration: | Not required | NIST traceable wavelength reference |
| Optical Connectors: | E-2000 APC (8°), patch cord or splitter required | E-2000 APC (8°) |
| Dynamic range: | N.A. | >50 dB |
| Measurement time: | < 2 s (incl. SDB writing) per channel | < 2 s (incl. SDB writing) per channel |
| Available channel count: | 4 or 8* channels total, software configurable between SOFO and MuST FBG | |
Specifications
| AC power supply: | 230 V 50 Hz / 110 V 60 Hz Auto detect |
| External connections: | Ethernet connection, display and screen (optional) |
| Data logger capacity: | Typical 5 year of data with measurements every 1h. |
| Dimensions: | ~ 500 mm x 500 mm x 210 mm |
| Weight: | ~ 25 kg |
| Operating temperature: | 10°C to + 40°C- 40°C to + 40°C with heating option |
| Humidity: | 90% non-condensed |
