Power Measurement - OPHIR vega User Manual

4.4 Power Measurement

The next section describes the procedure for basic
power measurement as well as more advanced features
with thermal measuring sensors.
4.4.1. Power Measurement, Basic Operation
1. Switch the Vega on by means of the on/off switch
that is found beneath the navigation keypad (See
Figure 3.1). The Vega will enter the mode of operation
last saved with the "Configure" operation. For basic
operation, you need only set up the parameters for
the type of measurement you wish (Section 4.3
describes the procedure to store your configuration),
and the Vega will be ready to perform that type of
measurement each time it is switched on.
normal default measurement mode is the bargraph
autoranging power measurement screen or the
needle display screen.
2. If the Vega is in "Energy" mode, pressing the "Power"
soft key will cause it to enter the power measurement
mode.
3. Center the laser beam carefully on the absorber
surface and read the power.
4.4.2. Additional Power Measurement Features
The following section describes additional Vega
functions in power mode in addition to the basic power
measurement mode described above.
4.4.2.1. Zoom
The Zoom function causes the scale to expand the
present scale fivefold.
bargraph is 20 watts, and your reading is 15 watts,
pressing "zoom" will make the bargraph scale range
between approximately 13 and 17 watts. Variations in
power are more easily seen in this mode To access the
zoom function, simply press the "Zoom" button. It will be
highlighted to show that it is engaged. Note that the
fiducial marks of the bargraph are further apart,
Thus, if the full scale of the
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The