OBR4600 Datasheet, PDF (4/4 Pages) List of Unclassifed Manufacturers – Easily locate, identify and troubleshoot macro-bends,splices, connectors and breaks

OPTICAL BACKSCATTER REFLECTOMETER^TM
(Model OBR 4600)
Extended Range Spot Scan Interrogation¹
The Extended Range Interrogation
capability is available on the OBR 4600
with purchase of the extended range
mode and spot scan mode. To perform
strain and temperature measurements,
the distributed sensing option is required
in addition to the above. This capability
extends strain and temperature
measurements up to a range of 2 km for
applications located in a benign vibration
environment.
APPLICATIONS
• Evaluating spools of Fiber Bragg
Gratings
• Evaluating optical networks and
devices
• Strain and temperature at a distance
PARAMETER
Maximum Range
Spot Scan Size
Maximum Wavelength Range
Time Per Scan
2-pt Spatial Resolution
Wavelength Accuracy²
Strain Range³
Strain Accuracy^2,5
Temperature Range^3,4
Temperature Accuracy^2,5
Minimum Gage Length⁶
Minimum Sensor Spacing
SPECIFICATION
2,000
80
3.2
6.5
0.25
± 5.0 + 12*ΔT
± 1,250
± 4.1 + 9.9*ΔT
± 175
± 0.5 + 1.2*ΔT
3
0.6
UNITS
meters
meters
nm
seconds
mm
pm
µStrain
µStrain
°C
°C
cm
mm
1 Extended range sensing works best with a low net change in accumulated strain between the unit and the sensing region.
2 Internal wavelength calibration using a NIST-traceable HCN gas cell occurs upon instrument configuration, but may drift with
temperature. Wavelength offset measured at 1550nm. Thermal drift, ΔT, in degrees Celcius.
3 Based on maximum wavelength range of 3.2 nm.
4 Actual temperature range will be limited by the sensing fiber used.
5 Temperature accuracies are calculated from the wavelength accuracy using the spectral shift of Rayleigh scatter, 1 GHz = 0.8 °C
= 6.58 µε. [Othonos and K. Kalli, Fiber Bragg Gratings (Artech House, Boston, 1999)].
6 Larger gage lengths may be required to meet noise specifications in the presence of vibration.
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