Section I
Theory of Operation
Page 1.3
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1.7 Digital Monitoring Panel
The UPS is equipped with a standard Digital Monitoring Panel which selectively
monitors critical parameters of the UPS, using easy-to-read digital displays. In addition,
detailed instructions guide the operator through the UPS startup. An alarm history can be
called up on these digital displays when desired.
In the event of an abnormal condition, an audible alarm sounds and the LED
illuminates red to identify an alarm condition so that corrective action can be taken. Alarm
Silence and Emergency Power Off pushbuttons are provided.
This panel is discussed in greater detail in Section III.
1.8 Multi-Level Passwords
A password is required to access and make use of the UPS Maintenance Menu,
described in Section 3.6.3. This menu, with five subsections, makes possible the
performance of a variety of maintenance functions including transfer and retransfer to
bypass, password changes and adjustment of time and date.
All passwords may be changed by a person who already knows either the password in
question or a higher level password.
Passwords consist of a minimum of 4 characters and a maximum of 9 characters.
The numerals 0 through 9 and letters A through F may be employed.
The first character of the password indicates the privilege level of the password. The
higher the privilege level, the more capabilities that password can access.
Privilege level 0:
No password. Used for the front panel display of voltages, currents,
etc. only. Does not permit any menus to be accessed.
Privilege level 1:
Reserved for future development.
Privilege level 2:
Remote operator password. Used to monitor the UPS, but not to affect
transfers and retransfers.
Privilege level 3:
Reserved for future development.
Privilege level 4:
Operator password. Monitors the UPS as well as allowing transfers,
retransfers, transfer enables, retransfer enables, reset faults, etc.
Privilege level 5:
Reserved.
Privilege level 6:
Super-Operator password. Allows access to UPS operating
parameters. It is enabled only for users who attend a one week
maintenance training course.
