Doc# E107706 5 - 20
5: Communication Wiring
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
NOTE: Please make sure that the selected clock can drive the amount of wired loads.
5.11: Time Synchronization Alternatives
(See the Communicator EXT
TM
4.0 and MeterManager EXT Software User Manual for
details.)
IRIG-B
• All Nexus® 1250/1252 meters are equipped to use IRIG-B for time synchroniza-
tion.
• If IRIG-B is connected, this form of time synchronization takes precedence over the
internal clock. If the GPS Signal is lost, the internal clock takes over time keeping
at the precise moment the signal is lost.
Line Frequency Clock Synchronization
• All Nexus® meters are equipped with Line Frequency Clock Synchronization, which
may be enabled or disabled for use instead of IRIG-B. If Line Frequency Clock
Synchronization is enabled and power is lost, the internal clock takes over at the
precise moment power is lost.
Internal Clock Crystal
• All Nexus® meters are equipped with internal clock crystals which are accurate to
20ppm, and which can be used if IRIG-B is not connected and/or Line Frequency
Clock Synchronization is not enabled.
DNP Time Synchronization
• Using Communicator EXT, you can set the meter to request time synchronization
from the DNP Master. Requests can be made from once per minute to once per day.
See the Nexus® 1252/1262/1272/1500 DNP User Manual for instructions. You can
download the manual from EIG’s website:
www.electroind.com/pdf/DNPv3.0_Level2.pdf.
Other Time Setting Tools
• Tools>Set Device Time: For manual or PC time setting
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