XLINK 500/100 Operations & Maintenance Manual page # 77
A Result of Running Min and Running Max produce results which are the minimum and
maximum of the Running Average during the interval. Just like the simple minimum and
maximum, running minimum and maximum values are logged with the time stamp of when the
minimum and maximum occurred rather than when the measurement was scheduled.
The system holds up to 180 samples for the Running Average. How many samples are to be used
is computed by dividing the Averaging Time with the Sampling Interval. If the setup is such that
more than 180 samples are required, the system will show a setup error:
Setup Errors: M1 Too many samples setup for running average
Additionally, every time a measurement is completed without all the samples, the system will log
a “Missing samples” error
.
Logging and Transmitting Minimum and Maximum
The time for the average will be computed based on the measurement time and interval, as
described previously. However, the time stamp for the minimum and maximum will be the
actual time when the minimum or maximum occurred. For example, you may see the following
in the log for an hourly average with samples every minute where the data is not in time
sequence:
4/14/2016 16:00:00 AVG 30.335 G
4/14/2016 15:24:00 MX 31.248 G
4/14/2016 15:15:00 MN 25.661 G
4/14/2016 17:00:00 AVG 30.225 G
4/14/2016 16:12:00 MX 32.060 G
4/14/2016 16:39:00 MN 28.454 G
Explanation of the logged data above: At 16:00 the hourly measurement that started at 15:00 is
complete. The average gets timestamped with 16:00. However, the actual maximum value of
31.248 happened at 15:24 and the minimum value of 25.661 happened at 15:15.
Likewise, at 17:00, the measurement that started at 16:00 is complete. The maximum happened
at 16:12 and the minimum at 16:39.
When it comes time to transmitting minimum and maximum results, a unique timestamp will be
included with each value transmitted. An example below illustrates the formatting:
:ATMIN 91 #60 22.47 :ATMIN 101 #60 22.50 :ATMIN 191 #60 22.53
:ATMAX 71 #60 22.52 :ATMAX 136 #60 22.54 :ATMAX 216 #60 22.58
:ATAVG 41 #60 22.50 22.52 22.56
:ATMIN 91 #60 22.47 means that a minimum of 22.47 occurred 91 minutes ago.
:ATMIN 101 #60 22.50 means that a minimum of 22.50 occurred 101 minutes ago.
Contrast that format with :ATAVG which provides four readings on the same line, most recent
one 41 minutes ago, and subsequent readings each an hour later.
9.3.
Configuration Settings
9.3.1.
Measurement Type
The
Measurement Type
setting (in the Sensor section) will determine what kind of measurement
is made. Each of the different types will unlock other settings. For example, choosing
Analog
as
the
Measurement Type
will unlock the
Analog Type
setting.