OPHIR vega User Manual page 40

Laser power/energy meter
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"Configure" and enter again. Now choose the desired
startup parameters as follows:
1. Select "Startup mode" to choose "Power" or "Energy"
for the desired startup screen. Choose power or
energy and press enter and save. The Vega is now
configured to work in power or energy measurement
mode, respectively.
2. Select "Display Mode" and select the desired startup
screen. Press "Save". (Note that this selection is
saved in the Vega and not the sensor so will be
operative for all sensors). For more details on the
screen types see section 4.6.
3. Select "Power Range:" and in the same way choose
the manual power range you wish to be the default or
autorange. The Vega will now be in the range selected
when switched on with the sensor in question.
4. Now select "Average" and select the period you wish
to average power readings over. This feature is
especially useful for lasers with unsteady output. See
section 4.4.2.4 for details.
5. Now select "Energy Range" and choose the energy
range you wish to be the default. The Vega will now
be in the range selected when switched on with the
sensor in question. Note that there are only manual
ranges in energy.
6. Now select "Threshold" if you want to change the
energy threshold. See section 4.5.3 for details.
7. Now select "Laser" and select the laser type you want
to be the default. The Vega will now be correctly
calibrated for the absorption of the detector at the
wavelength of the laser type selected and will startup
with the laser wavelength selected.
8. Now press "Save" and the defaults will be saved. If
you only want the changes saved for the present,
"Exit" without save and the changes will be saved
until the Vega is switched off only.
9. Switch the Vega off then on by means of the on/off
switch. (See Figure 3.1). The Vega will enter the mode
of operation last saved with the "Configure" operation.
39

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