Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 70
Please note that if the setup is changed while X-Link is running, it may take up
to twice the measurement interval before X-Link switches to the new schedule.
To avoid the wait, reboot or toggle Recording.
7.1.1.6.
Averaging Time, Sampling Interval, Subsamples, and Results
X-Link can collect multiple samples and average them in order to produce a
measurement result. Averaging is useful for measuring changing conditions, such
as wind and water level. For example, correctly measuring the level of choppy
water requires that wave action be cancelled. That can be accomplished by
averaging over several minutes.
Setting the
Averaging Time
to 0 means that only one sample is to be collected
(no averaging).
This is the default setup. If
Averaging Time
is zero,
Sampling
Interval
and
Subsamples
will not be shown in the setup.
When averaging, X-Link takes several samples and averages them into a final
result. Each sample may also be composed of several subsamples.
Averaging Time
determines
how long
to collect samples for.
Sampling Interval
dictates
how often
to collect each sample.
Subsamples
tell how many sensor readings to include in each sample. Do not
use
Subsamples
unless you need two levels of averaging.
The simplest averaging requires only the use of
Averaging Time.
Example: Average temperature over an hour
If you want to know the average temperature for an hour, you would set up the
Averaging Time
to one hour.
Sampling Interval
or
Subsamples
would not need to
be changed
.
X-Link will collect sensor data all throughout the hour as fast as
possible.
However, if the power consumption for measuring the sensor continuously for
an hour were unacceptable, you would use the
Sampling Interval.
To take one sample every minute, the
Sampling Interval
should be set to one
minute. That way, X-Link will take 60 samples every hour, with approximately a
one-minute break between each sample.
If the sensor being used was noisy and needed filtering, X-Link could take several
Subsamples
and average them into each sample.
In the setup for temperature above, if the number of
Subsamples
were set to
five, X-Link would take five readings at the start of every minute and average