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MSM+ HB
9.2
Preparing measurement
9.2.1
Measurement process
The described measurement process is an example. Adapt the procedure to the conditions on site.
1. Follow the basic safety notes and the warning messages.
2. Observe the technical data in Chapter ("14 Technical data" on page 97
3. Make sure that the cyclone is mounted and covered with the alignment tool.
4. Make sure that the connections of the water cooling are firmly mounted and tight.
5. Turn on the water-cooling.
6. Turn on the measuring device.
7. Wait until the measuring device has finished the referencing procedure (duration approx. 30 seconds).
8. Start the LaserDiagnosticsSoftware LDS on your computer.
9. Change the z-position to 60 mm (center of the measuring range; 20 mm for MSM+ HB20).
10. Open the compressed air supply.
11. Turn on the pilot laser. The laser must hit the small hole in the alignment tool vertically, only then it is dis-
played centrally on the sensor.
12. Remove the alignment tool.
13. At the beginning measure the laser at low power and define the measuring range for the caustic mea-
surement. The measuring range typically comprises 2 to 3 Rayleigh lengths above and below the focus-
plane.
14. Carry out a test measurement with the desired z-range and at small power.
15. Increase the power gradually until the measuring power is reached and carry out a caustic measurement
(it might be necessary to adapt some parameters).
16. After finishing the last measurement, the objective should be covered with the alignment tool if it remains
in place. If the device is to be transported, use the aperture lock of the objective.
9.2.2
MSM+ HB with Fiber Bridge (option)
For a device with fiber bridge, pay attention to the traverse range in z-direction because it is limited by the
fiber adapter.
For an MSM+ HB10, select the "Fiber mode" measuring mode in the LaserDiagnosticsSoftware LDS. In
this mode, the travel path in x and y direction is blocked (see chapter "9.4.3 Open a measuring mode with
adapted toolbench" on page 52 and "9.10 Fiber mode measurement" on page 88).
With the MSM+ HB20, the movement in the x and y directions is blocked at the factory.
NOTICE
Danger of damage due to a collision of the objective with the fiber adapter.
The traverse range of the MSM+ HB in z-direction is limited by the fiber adapter. The maxi-
mum traverse range depends on the used type of fiber adapter.
X Please mind the limit values z
of the aperture plate.
Revision 00 EN - 02/2022
given in Tab. 9.1 on page 46, measured from the surface
max
45
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