Sutron Accububble 56-0131-50-1, Руководство по эксплуатации и техническому обслуживанию

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For this example the pump would only have 13% of the duty cycle it would have from purging
every reading, an 87% reduction in its power consumption.
As can be seen from a typical on_time of 0.5 seconds versus a typical purge time of 10 seconds,
substantial power savings can be achieved when frequent measurements are occurring.
Setting the Sample Averaging
The AccuBubble supports user selectable averaging time for SDI-12 readings. The number of
samples to average is specified with the aXPA+nspeed! extended command.
For example, the command
0XPA+10!
will set the averaging to 10 samples at the slow speed for a sensor at address 0.
There are two speed regions, slow and fast. If speed is 0 or omitted then the AccuBubble operates
in the default more accurate slow mode. In the more accurate slow mode (speed = 0) the noise floor
of the sensor is typically 0.0002 feet of water (0.00009 PSI), in the high speed mode (speed = 1) it
increases to 0.004 feet of water (0.002 PSI).
To fully specify sample averaging also requires the use of the pump timing command:
aXPT+ppuppump_cycle!
If multiple samples have been specified via the XPA command then for one measurement the purge
cycle is run and then the first sample is collected. In between that sample and each of the remaining
samples the pump on/off cycle occurs.
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