Leviton A8812, Инструкция по установке и эксплуатации

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11 SYSTEM OPTIONS
11.1 Status
The system status page shows the current memory and flash disk utilization values, system up time, and
load average. Also included on this page are two buttons for Reboot and Shutdown. It is important to use
the shutdown option prior to removing power from the DAS. The LCD console will report the reboot or
shutdown status.
11.2 Processess
The system process table is shown in both tree and tabular formats. The process list is useful when
contacting Leviton technical support.
11.4 Universal Time
Log data is stored in UTC time. This allows data collection services such as BMO to collect data from
multiple sites in different time zones. If you are operating your own database system to store log data from
the DAS, it is best to store the data in UTC time in the database as well, and only convert it to local time
when generating the final report or graph for the user.
11.3 Date and Time
The DAS keeps time using UTC or Universal time. All log files are recorded in UTC time as well.
Timestamps shown on the DAS local configuration pages are converted to local time for the convenience of
the installer. The date/time configuration page provides the following options:
Date/time in UTC and Local time.
Date/time dropdown menus to select the current (local) time manually.
Timezone: a drop down list of the supported zones.
Time sync protocol: Select NTP or Rdate. Most Linux/Unix systems provide rdate, however many provide
NTP as well. Windows domain servers can also provide NTP. If possible use NTP as it is a more
robust protocol.
Time Server: Specify the DNS name or IP address of your time server. The default “time.leviton.com”
can be used if the DAS has a connection to the Internet. The DAS will attempt to synchronize time with
the time server every time an upload session. This will ensure that the clock is checked and adjusted at
a minimum of once per day. Typically, the synchronization will align the clock to /-1 second of the
internet time source or atomic clock. You may need to verify if your firewall will allow NTP or Rdate packets
to pass through. Generally, it is better to use a local time server if possible. The time server time.leviton.com
supports both NTP and Rdate time protocols. If you use a GSM connected system, you will probably need
to use Rdate. NTP is blocked by many cellular service carriers.
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