ASHA Beam Profile PMB-201, Manual, Page: 15 / 20

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turn off and you can unplug the adaptor from the console.
This device can measure 3 ranges specified in the technical table.
To prepare the device to measure the desired range, turn the selector
and select the desired range. In the end, turn on the beam source or
remove the obstacle and measure the beam.
One of the features of this product (according to the order)is the offset
setting, which can be used to remove the background radiation and
then measure the absolute power of the beam source. To do this, use
the offset knob on the back panel of the device and rotate the knob
to apply the desired offset according to the application. One of the
important applications of this feature is the removal of the background
radiation from the end result, which is very useful in environments
with unwanted background radiation.