7EN02-0390-03

Supported time synchronization sources

Several time synchronization sources are available to your meter.
Time sync source Description
Meter configuration software (ION Setup) Configuration software can manually synchronize the time of your meter based on the clock of the computer running the configuration software. Configuration software synchronization is usually performed when the meter is initially commissioned.
Energy management system Energy management systems can synchronize the time of your meter to be consistent with other meters on the network.
GPS receiver (IRIG-B)1 A GPS receiver using IRIG-B can synchronize the time of a meter up to ± 1 ms of Coordinated Universal Time (UTC). A dedicated serial network is required to implement a GPS scheme. For IRIG-B, one of your meter’s digital inputs must be connected to the IRIG-B network, and the digital input must be configured for IRIG-B time synchronization in addition to configuring your meter’s clock.
GPS over serial A GPS receiver can synchronize the time of a meter up to ± 1 ms of Coordinated Universal Time (UTC). For GPS over serial, your meter’s serial port must be connected to a GPS receiver, and the serial port communications must be configured with the correct protocol setting.
Simple Network Time Protocol (SNTP) SNTP can synchronize the time of your meter up to ± 1 second of other meters on an Ethernet network. For SNTP time synchronization, your meter must be connected to an Ethernet network that has an active SNTP server and be configured with the server’s information.
Network Time Protocol (NTP) NTP can typically synchronize the time of a meter to ± 10 to 100 ms, depending on network configuration. To implement NTP time synchronization, your meter must be connected to an Ethernet network that has an active NTP server and be configured with the server’s information.
Precision Time Protocol (PTP)2 PTP can synchronize the meter time to ± 1 ms of other devices connected to a local area network. To implement PTP time synchronization, your meter must have PTP selected as the time sync source and be connected to an Ethernet network that has a valid PTP Master (Grandmaster Clock).

1 Use the digital inputs located on the meter base for IRIG-B time synchronization and other high-accuracy applications.

2 This clock precision assumes your meter is installed in a Star network topology only.

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