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Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 74
12:05 Sample sensor (reading = 5.0). Compute and log 5 minute average. Result = 3.0,
computed as (1.0+2.0+3.0+4.0+5.0)/5;
12:06 Sample sensor (reading = 6.0). Compute and log 5 minute average. Result = 4.0,
computed as (2.0+3.0+4.0+5.0+6.0)/5;
12:07 Sample sensor (reading = 7.0). Compute and log 5 minute average. Result = 5.0,
computed as (3.0+4.0+5.0+6.0+7.0)/5;
Compare this to a simple average. A simple average over five minutes would produce a reading
every five minutes. It would be setup with Measurement Interval of five minutes, an Averaging
Time of five minutes, and a Sampling Interval of 60 seconds.
12:01 Sample sensor (reading = 1.0). No reading is logged.
12:02 Sample sensor (reading = 2.0). No reading is logged.
12:03 Sample sensor (reading = 3.0). No reading is logged.
12:04 Sample sensor (reading = 4.0). No reading is logged.
12:05 Sample sensor (reading = 5.0). Compute and log 5 minute average. Result = 3.0,
computed as (1.0+2.0+3.0+4.0+5.0)/5;
12:06 Sample sensor (reading = 6.0). No reading is logged.
12:07 Sample sensor (reading = 7.0). No reading is logged.
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.
9.2.3.3.
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.