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To counter this, the "relative" acquire on change method must be set on the logger. To do this requires the use of the "Rail Event" feature of the SA380TX.
1) Open the "Rail Events" Tab - This is where we can create all sorts of clever acquisition rules.
RAIL EVENT TAB
2) Create a new "Rail Event" - This sets up a new set of acquisition rules. It is OK for your Rail Event to errors at this stage.
CREATE NEW RAIL EVENT
3) Create the "Start Trigger" - We want to acquire data when the SA380TX boots up, and then whenever there is a significant change in insulation resistance. Whenever there is a +/-5% change in insulation resistance, a new acquisition is started. It is OK for your Rail Event to errors at this stage.
SET START TRIGGER
4) Tell the SA380TX what to Acquire - We want to keep acquiring insulation resistance values so long as they continue change. Every time the insulation resistance changes by another 5% of its prior value, we grab another sample. It is OK for your Rail Event to errors at this stage.
SET ACQUISITION
5) Set the end conditions - We don't need an "end trigger" we keep on acquiring samples so long as they continue to change. At some point though we want to barrel these samples up and send them to Centrix. This is why we put a time-out period of 1 minute in place.
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