SATEC EM920 Operation Manual - Manual (Page 18)

Chapter 2 Operating the EM920
Meter Clock and Time Synchronization
18 EM920 Power Quality and Revenue Meter
permits clearing the billing data registers and billing data
profile files (see
Clearing Billing Data ).
The following table shows the meter security levels and user
access rights.
Password Security Level Access Rights
Password 1 Low Reset of billing and engineering maximum
demands, and device diagnostics.
Meter clock update.
Display setup.
Password 2 Medium 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.
Password 3 High
(Administration
level)
Meter passwords setup.
Basic device setup.
Device energy and power options setup.
Reset of conventional log files.
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
Configuring
Meter Passwords in Chapter 5 on how to change passwords in
your meter.
Password-tampering events are automatically recorded to the
Event log file after every three unsuccessful login attempts in
5 minutes.
Meter Clock and Time Synchronization
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 EM920 can receive a time synchronization signal either
from a GPS satellite clock that has an IRIG-B time code
output, or from another device that can provide 1PPS or
1PPM time synchronization pulses through relay contacts.
The EM920 IRIG-B port uses unmodulated (pulse-width
coded) time code signal (unbalanced 5V level).
The EM920 also provides an SNTP client that can receive
precise time from an available SNTP server via the Internet.
See Time Synchronization Source in Local Settings setup (see
Local Settings in Chapter 5) for more information on how to
select an external time synchronization source in your meter.
See Setting-Up SNTP Client in Chapter 5 on how to configure
the SNTP client.