ODiSI 6
ODiSI 6
User’s Guide
Page 31
Figure 6-3: Luna CFG sensor is ready
All other operations such as viewing the sensor, defining gages and segments, and running a
test are the same as other sensor types. Note that when viewing a sensor plot, the 0-meter x-
axis position for these CFG sensors corresponds to the first grating for which results are
returned; the 0-meter x-axis position is not the fiber sensor connector.
Gage Pitch
The
“Gage Pitch” selection specifies the distance between the center of one gage and its
nearest neighbor. For the ODiSI 6100 Series, there are five Gage Pitch selections: 1.04 cm
(only for SC Temperature sensors), 5.2 mm, 2.6 mm, 1.3 mm (not available for sensors longer
than 50 m), and 0.65 mm (not available for sensors longer than 20 m long). For the ODiSI
6000 Series, there are two Gage Pitch selections: 1.04 cm (only for SC Temperature sensors)
and 5.2 mm. Select the Gage Pitch most suitable for the test by clicking the
“Settings →
General” menu item.
6.1.2.3.1
Advantages of a Smaller Gage Pitch
A smaller gage pitch setting can be used to see smaller features in the strain data that would
normally be hidden within a single gage when viewed with a larger pitch. Additionally, a
smaller gage pitch setting can improve the ability of the system to make measurements in
areas of high strain gradients (large strain change over a small distance).
6.1.2.3.2
Gage Pitch and Measurement Rate
A given gage pitch setting presents a tradeoff between measurement rate and the
measurement density. Choosing a larger gage pitch automatically increases the
measurement rate.
