Long Gage Strain Sensor |
os3610
C o p y r i g h t © 2 0 1 2 M i c r o n O p t i c s , I n c .
o s 3 6 1 0 I n s t a l l a t i o n G u i d e , R e v i s i o n A
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Figure 7
– Mounted Sensor
Using a torque wrench fitted with a 1/8 hex key, torque the two set screws on the Fixed-end of
the sensor. Tighten the two screws to a torque of 75 inch-pounds [8.5 Nm]. The two set screws
on the Active-end of the sensor should remain loose.
Figure 8
– Sensor
Adjust pretension as required for the particular application. For example, if the application
requires the sensor to operate equally in tension and compression, the sensor should be installed
centered within its range. The pre-Strain can be visually adjusted by monitoring the two gaps
shown in Figure 9. The sensor can be centered or biased to one side of its range.
The sensor pretension and corresponding wavelength can be adjusted by gently grasping the
Active-end of the sensor and sliding it in the mounting bracket.
If desired, the sensor can also be connected to an interrogator and adjusted while observing the
interrogated wavelength. For example to center the sensor, adjust the Active-end until the
wavelength is halfway between the minimum and maximum wavelength value. The wavelength
should increase as the sensor is extended. The wavelength should decrease as the sensor is
compressed.
