DH Instruments PPC4, Operation And Maintenance Manual

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PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 48
Security Levels
The security levels are structured to support typical operating environments as follows:
Off 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.
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.
High High security is designed to protect all operating parameters. It is
intended to minimize operator choices, for example to perform
repeated identical calibrations under consistent conditions.

Caution
PPC4 is delivered with the security level set at low to avoid
inadvertent altering of critical internal settings but with access
to changing security levels unrestricted. It is recommended that
the low security level be maintained at all times during normal
operation. If there is a risk of unauthorized changing of the
security level, changing authority should be password
protected.
The security levels are structured to support typical levels of operation as shown
in Table 11 and Table 12. Security levels prevent execution of the functions
accessed by the key strokes marked by “•” or, in some cases with the Advanced
Interface, prevent changes from being saved – thus allowing viewing of settings
without allowing changes to be made: