DH Instruments PPCK PLUS, Operation And Maintenance Manual

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PPCK+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc .
Page 64
Security Levels
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.
Low This level of security is designed to protect the specific metrological
information and system diagnostic and maintenance functions of
the system. It is intended for an advanced operator performing many
different tasks.
Medium This level of security is designed to protect specific metrological
information in the system and to assure that the PPCK+ is operated using
consistent operational parameters.
High This level of 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.
PPCK+ 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. If there is a
risk of unauthorized changing of the security level, changing authority should be
password protected (see OPERATION of this Section).
The security levels are structured to support typical levels of operation as shown in
Table 9.
Specifically, the security levels prevent execution of the X’d functions.