Martel Electronics BetaLOG-PI - Manual (Page 4)

The gauge can log pressure only for each sample, or it can log
pressure and temperature for each sample. This selection applies to
all runs and must be made prior to starting the first run.
When logging pressure only, the gauge has a capacity of 8500 data
records for storing run identification data and log sample data. Each
new data logging run requires 7 records for run identification overhead.
One record is required to log each sample, except for the triple value
case (average, minimum, maximum) where 3 records are required to
log each sample set.
Assuming a single run, the maximum capacity for all but the triple
value case is 8493 samples, and the maximum capacity for the triple
value case is 2831 sample sets.
When logging pressure and temperature, the gauge has a capacity of
5100 data records for storing run identification data and log sample
data. Each new data logging run requires 7 records for run
identification overhead. One record is required to log each sample,
except for the triple value case (average, minimum, maximum) where 3
records are required to log each sample set.
Assuming a single run, the maximum capacity for all but the triple
value case is 5093 samples, and the maximum capacity for the triple
value case is 1697 sample sets.
The interval time setting determines the frequency of sample
calculation and storage. Eleven discrete interval times are available,
ranging from 1 second to 1 hour.
A sample value is calculated at the end of each interval based on all of
the pressure measurements made during that interval. The sample
value may be the last measurement made in the interval, or it may be
the average, minimum, maximum, or median of all of the
measurements made during that interval.
A sample value may be stored for every interval during the run, only for
those intervals where the sample value exceeds a specified high or low
limit, or only for those intervals where the pressure differential during
the interval exceeds a maximum span.
The data logging function is disabled by default in all new gauges.
The BetaLOG application is used to enable and disable the data log
function in a gauge.
Two data logging modes are available, Download and Demand.
Multiple log runs are allowed in either mode, with the potential number
of runs dependent on the number of samples logged in each run and
the capacity of the gauge.
When the data logging mode is set to Download, the BetaLOG
application is used to enter or change the data logging parameters and
send them to the gauge. The gauge remains in this mode until either
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