User manual for single-phase meter
30
15 RTC
Supports calendar, time and leap year automatic when switching function.
The accuracy is less than 0.5s/day at 23℃, totally comply with IEC 62054-21
Content of clock and range
Year (2000~2099)
Month (01~12)
Day (01~31)
Week (01~07) from Monday to Sunday
Hour (00~23)
Minute (00~59)
Second (00~59)
It is not suggested to synchronize clock around 0:00 o’clock to avoid the repetition or
missing of frozen data.
15.1 DST(optional)
DST(Daylight Saving Time): DST is a system which regulates the local time for energy
conservation. the unified time is called “DST”. Generally, During summertime, people will set the
time one hour ahead, in order to make people get up and go to bed earlier, reduce the amount of
lighting, and make full use of light resources and save lighting electricity.
15.1.1 DST configurable
Once set DST and activated, it keeps working until reset the program. Available to set start
time in any month any week any day and end time can be set in the same way. For example, start
on Monday in the last week of March and end on Friday in second week of September. Or set to
start on 10
th
March, end on 8
th
September directly.
After entering DST, meter’s time will be adjusted in 1 hour
ahead. When exiting DST, meter time shall be adjusted in 1 hour later.
When set the DST parameters or change the meter’s clock, the meter starts to work hourly
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