Pyroelectric Sensors - OPHIR vega User Manual

1. From the main power measurement screen press
"Offset".
2. Press "Offset" again to cancel. See Section 5.4.5 for
full details.
To use the Vega to fine-tune Laser power:
1. From the main power measurement screen select
"Menu" and enter. Select "Tune" and enter.
2. Set the percentage range of the power scale to be
displayed by repeatedly pressing the ±50% key.
3. Now select the horizontal sweep time you desire by
selecting "Graph" and choosing the time scale.
4. You may now use the screen to tune the laser power.
See Section 4.4.2.3. for full details.
5. Press "Power" to exit to the main measurement
screen.

2.5 Pyroelectric Sensors

2.5.1. Zeroing Instrument against Sensor
For the most accurate calibration, you must zero the
pyroelectric sensor against the Vega it is being used
with. Proceed as follows: Make sure the sensor is in a
quiet environment and not subject to pulsed
radiation. Plug sensor into Vega and turn on. Press
"Menu", select "Zero" and enter. Press "Start".
When "ZEROING COMPLETED" appears, press
"Save". Press "Exit" and then choose the screen
from the menu that you wish to use. After you have
done zeroing, you do not have to do it again when
used with the same type of meter. If you have zeroed
it against a different type of meter, then a different
value has been saved and when used with a Vega
again you should zero it again.
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