Note: Smaller number means higher priority level.
2.10.3 Status checking
If the meter has executed the closing command, then it is deemed that the relay is under
a closed status. If the meter has executed an opening command, then the meter tests if
there is current flowing. If there is current flowing then it is deemed that the opening
command has failed, if not, the relay is regarded as having an open status.
Due to the limitations of using current as a means of determining the status under closed
conditions the meter executes the closing command twice to assure the successful closing
execution.
In order to keep the relay status the same as that already expected and commanded
previously the meter executes the latest relay command to keep the relay status correct
when the meter is energized.
2.10.4 Malfunction definition
If the current command is relay open, but due to some reasons the meter failed to open the
relay, the meter will try up to 5 times to repeat the command. If the relay still can’t be opened,
then it is deemed to have malfunctioned. The meter will then continue to try an hour later and
also every time at which the meter is energized.
2.11 Real Time Clock
Supports calendar, time and leap year automatic switch function.
The meter is equipped with a clock module that runs the time from a 32768HZ crystal
oscillator
The error is less than 2s/day at 25℃.
Should the customer request higher precision, the crystal oscillator will be calibrated in
factory and the error could be less than 0.5s/day at 25℃.
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