5-5
5 Operating the Vibrometer
5.6 Making Single Point Measurements with the Sensor Head OFV-512
If single point measurements are carried out with the sensor head OFV-512,
one of the two fibers must be terminated with a reference head. The reference
head is marked with a red dot. Always mount the reference head to the
reference fiber, also marked with a red dot.
As default each sensor head OFV-512 is delivered with the reference head
OFV-151. The reference head is exactly adjusted to its sensor head.
Therefore each reference head has a own serial number which is noted in the
examination protocol.
Optionally you can use the reference head OFV-152 with adjustable stand-off
distance. You will find information on this in
Assembly
To mount the reference head OFV-151 onto the reference fiber, proceed as
follows:
1. Unscrew the mini sensor from the reference fiber and keep in a safe place
because each mini sensor is exactly adjusted to its fiber.
2. Screw the reference head onto the end of the fiber until it is securely fixed.
The reference head can now be used.
5.7 Fixing the Focus (only OFV-353)
The OFV-353 sensor head is particularly suitable for applications in which the
sensor head is subjected to some mechanical stress (shaking etc.). If the
front lens is fixed, the focus remains stable for a long period of time.
The focus fixing mechanism is operated by the knob BRAKE ON / OFF.
Proceed as follows:
1. To fix the focus, press the knob BRAKE ON / OFF into the front panel until
it stops (BRAKE ON).
The mechanism is stopped internally with a series of cogs. The fixing
positions of the lens are therefore not continuous but are very close to
each other.
2. To release the fixing mechanism, pull the knob BRAKE ON / OFF out until
it clicks into place (BRAKE OFF). Then turn the focusing ring until the
adjustment mechanism clicks into place. You can now focus the laser
beam as described in
Note !
Never exchange the reference head of a sensor head with a reference head of another
sensor head !
Summary of Contents for OFV-3001
Page 28: ...3 16 3 First Steps...
Page 54: ...5 12 5 Operating the Vibrometer...
Page 94: ...D 10 D Functional Description of the Controller...
