Meter Clock And Time Synchronization; Monitoring Meter Batteries - Satec expertmeter EM720 Operation Manual

Chapter 2 Operating the EM720

Meter Clock and Time Synchronization

Monitoring Meter Batteries

EM720 Power Quality and Revenue Meter
Password Security Level
Password 2 Medium
Password 3 High
(Administration
level)
The meter is primarily shipped with all passwords preset to 9
at the factory. It is highly recommended that you change the
factory set passwords as fast as possible. See
Meter Passwords
your meter.
Password-tampering events are automatically recorded to the
Event log file after every three unsuccessful login attempts in
5 minutes.
Time synchronization provides a common time basis for the
meter billing and tariff system, and for the power quality and
fault recorders so that events and disturbances can be
compared to one another.
The EM720 can receive time synchronization signal either
from a GPS satellite clock that has an IRIG-B time code
output, or from another device that can provide minute-
aligned time synchronization pulses through relay contacts.
The EM720 IRIG-B port uses unmodulated (pulse-width
coded) time code signal (unbalanced 5V level).
IRIGB LED is blinking when the IRIG-B port receives a GPS
clock signal.
The EM720 also provides an SNTP client that can receive
precise time from an available SNTP server via the Internet.
See Setting-Up SNTP Client
the SNTP client.
See Time Synchronization Source in
more information on how to select an external time
synchronization source in your meter.
The EM720 is provided with a rechargeable auxiliary battery
that can supply power in the event of long outages without
the need of an external power supply.
A second backup lithium battery keeps the meter clock
running when the meter goes to standby after the auxiliary
battery is discharged.
Meter Clock and Time Synchronization
Access Rights
TEST mode.
Reset of meter and battery operation time
counters, failure counters and pulse counters.
Communications setup.
I/O operation setup and control.
Memory and recorders setup.
Billing/TOU system setup.
Meter passwords setup.
Basic device setup.
Device energy and power options setup.
Reset of conventional log files.
in Chapter 5 on how to change passwords in
in Chapter 5 on how to configure
Configuring
The red
Local Settings setup for
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