Time Synchronization Alternatives - GE Grid Solutions Multilin 9450 Instruction Manual

TIME SYNCHRONIZATION ALTERNATIVES

5.11 Time Synchronization Alternatives
5–18
(See the GE Communicator Instruction Manual for details.)
IRIG-B
• All EPM 9450/9650 meters are equipped to use IRIG-B for time synchronization.
• 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 EPM 9450/9650 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 EPM 9450/9650 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 GE Communicator, 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 EPM 9450 or EPM 9650 DNP Guide for instructions. You can download
the manual from GE's website: www.gegridsolutions.com.
Other Time Setting Tools
• Tools > Set Device Time: For manual or PC time setting
• Script & Scheduler: Time stamps retrieved logs and data
• MV90: Can synchronize time on retrievals in the form of a Time Stamp. Refer to the
GE Communicator Instruction Manual (HHF Converter) for more MV-90 details.
EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: COMMUNICATION WIRING