PG7000™ OPERATION AND MAINTENANCE MANUAL
© 1998-2008 DH Instruments, a Fluke Company
Page 116
The ID can be viewed and edited but it cannot be cleared or reset by any reset
functions (see Section 3.11.9).
3.11.4.5
<4PREFS>, <5LEVEL>
PURPOSE
To set user protection levels that restrict access to certain functions and to edit
the password required for changing User Levels.
PRINCIPLE
PG7000’s front panel user interface provides the means to access all PG7000 user
defined data, settings and functions including calibration data. Inadvertent,
uninformed or unauthorized altering or deleting of data, settings and functions could
require extensive reconfiguration by the user and might cause invalid readings. For
these reasons, depending upon the application in which PG7000 is being used, it
may be desirable to restrict access to certain functions. The USER LEVEL function
provides a means of restricting access to certain functions. Four different levels of
security are available: none, low, medium and high.
Access to changing security levels can be left open, or be protected by a
password so that security levels can be used as a convenient way to avoid
accidental changing of data or as a secured means of preventing tampering with
PG7000 settings.
The security levels are structured to support typical operating environments as
follows:
None
This level is intended for use only by the system manager and/or calibration
facility. It allows access and editing in all areas including critical metrological
information and other settings that affect measurement integrity.
Low
Low security is designed to protect the specific metrological information and
system diagnostic and maintenance functions of the system against accidental
alteration. It is intended for an advanced operator performing many different
tasks. Low security is the default User Level setting.
Medium
Medium security is designed to protect specific metrological information in the system
and to ensure that PG7000 is operated using consistent operational parameters.
High
High security protects all operating parameters. It is intended to minimize
operator choices (e.g., to perform repeated identical tests under consistent
conditions).
PG7000 is delivered with the security level set to low to avoid inadvertent altering
of critical internal settings but with unrestricted access to changing security
level setting. It is recommended that the low security level be maintained at all times
and password protection be implemented if control over setting of security levels
is desired.
If there is a risk of unauthorized changing of the security level, changing
authority should be password protected (see OPERATION of this section).
The High security level disables remote communications and returns an error
message (“ERROR”) to all remote commands. All other security levels have NO effect
on remote communications.
