Use the fields within the Significant Change section of the Analog Point tab to define the amount by which an Analog point’s value has to change before it is reported to the Geo SCADA Expert server.
For further details, see Define the Criteria for a Significant Change in Value.
Be aware that if an analog point is configured to use Persistence in addition to Significant Change, this has an affect on when a change in point state is recorded (see Use Persistence to Stop Fleeting Changes in Value from Changing a Point State).