PRIMES
BeamMonitor BM+ with LDS 2.98
68
Revision 01/2018 EN
14
Troubleshooting
Error
Possible Reason
Remedy
Error during a measure-
ment
•
Error in the data trans-
mission
•
Processor crash in the
measuring system
•
Error in the programme
execution
1. Please restart the system (button
Reset
in the
menu
Measurement>>Single Measurement
).
2. Turn off the supply voltage and turn it on again and
start another reset cycle.
3. Restart the computer.
Beside an ambient noise
and the zero offset
1)
no
measuring signal is avail-
able.
The device is not set up cor-
rectly.
Please check the device alignment to the laser beam.
The power density in the focus
is too low.
Please increase the laser power. The absolute power
density in the focus typically has to be several hundred
kW/cm² in order to achieve a significant measuring signal
with a standard measuring tip.
For smaller focus spots
(e.g. rf = 80 µm) and a maxi-
mum measuring window the
resolution is too low.
First measure outside the direct focusing range. If no result
is achieved, please increase the resolution (e.g. 256 x 256).
The signal enhancement is
too low.
Please set the maximum enhancement and choose
the maximum measuring range in the dialogue window
Measurement>>Single...
For the presentation please
choose the option
Autoscale
.
For the measurement of
small beams an offset of
the measuring track to
each other is monitored.
Fluctuations in the synchro-
nism of the rotation disc as
well as delays as far as the
triggering of the trigger signal
is concerned.
The beam position should possible be as close to the left
edge of the window as possible. The temporal distance
between the trigger signal and the start of the measure-
ment then gets smaller and errors can be reduced. In
this case, an averaging is often helpful.
1) ) In case of the BeamMonitor BM+ typically 800 counts (the current number of “Counts” can be found in the menu item
Presentation>>Variable Contour Lines
).
