Satec expertmeter EM720 Operation Manual page 79

Chapter 5 Configuring the EM720 General Meter Setup
When the signal is restored, the meter automatically acquires
the GPS time.
Whenever the IRIG-B signal status or quality changes, the
corresponding event is automatically recorded to the device
Event log.
You can check presence and quality of the IRIG-B signal via
the device diagnostics display (see Device Diagnostics Display
in Chapter 3) or via PAS (see Clearing Device Diagnostics in
Chapter 6).
Using SNTP
Enable SNTP client operation and configure it if required (see
Setting-Up SNTP Client).
When an SNTP server is not available or when a connection
with a server is restored, the corresponding event is
automatically recorded to the device Event log.
Using Time Synchronization Pulses
Select one of the available digital inputs as either 1PPS, or
1PPM synchronization input.
The transition edge of an external pulse (open-to-close or
close-to-open transition depending on the selected pulse
polarity) adjusts the meter clock to the nearest whole second
for a 1PPS source, or to the nearest whole minute for a 1PPM
source. The time accuracy may be affected by the operation
delay of an external relay.
EM720 Power Quality and Revenue Meter 79