Power Measurement
Beam Cube User Guide
higher range. If the readings fall below 9% of the
present range, the instrument reconfigures itself for
the next lower range after a short delay. The delay
prevents an infinite range-changing loop when
readings are close to the end of the scale.
6.2.5
Averaging the Measurements
The thermopile head takes a measurement 15 times a
second. USBI automatically refines your readings and
applies a moving average.
When you set the instrument to average mode, the
instrument displays the average of the readings spanning
from the last time average mode was activated, to the
present. Once the time period of the average is reached,
the average becomes a running average, spanning the
average period backwards in time. For example, if the
average period is 30 seconds, at 15 seconds, the average is
over 15 seconds; at 30 seconds, the average is over 30
seconds; at 5 minutes, it is over the period from 4 minutes
and 30 seconds to 5 minutes (30 seconds back from the
present).
To select an average period:
Select the average in seconds from the
Average
drop down
list in the Graph Configuration Area.
Figure 24 Average Drop Down List
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