DH Instruments PPCH-G, Руководство по эксплуатации и обслуживанию

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PPCH-G™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 80
In addition, the cursor control keys can be used to toggle through a list of
available alpha numeric characters. Holding the key slews through the
characters. Character order going up is: blank space, symbols, lower case
letters, upper case letters, numbers. After selecting a character, press
[ENT]
to
activate it and move to the next character field.
When a character is selected the cursor moves to the next character. To leave a
blank character, press
[ENT]
with the field for that character blank. Use this for
the trailing characters if the ID being entered is less than twelve characters.
After the last of the twelve characters has been entered, the
<Save ID?>
option is offered.
Select
<1no>
to return to the ID edit screen. Select
<2yes>
to save the edited ID.
The ID can be set remotely from a computer which is quite a bit more convenient
than entering characters from the keyboard (see Section 4.4, ID command). The ID is
not cleared or reset by any RESET function (see Section
3.5.4).
3.5.5.5 <5LEVEL> (SECURITY)
 PURPOSE
To set user protection levels to restrict access to certain functions and to edit the
password required for changing user levels.
 PRINCIPLE
PPCH-G’s front panel user interface provides the means to access all PPCH-G
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 and behavior. For these reasons, depending upon the application in
which PPCH-G is being used, it may be desirable to restrict access to certain
functions for certain users. The user level function provides a means of restricting
access to certain functions. Four different levels of security are available.
Access to changing security levels can be left open, or be protected by a password.
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
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 assure that the PPCH-G is operated
using consistent operational parameters.
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.