PPC2 AF OPERATION AND MAINTENANCE MANUAL
© 1998 DH Instruments, Inc. Page 50
3.4.4.5.3 Reset - com
Resets communications port settings: COM1 and COM2 set to 2400,E,7,1 using
<CR> and <LF> as the terminating characters.
3.4.4.5.4 Reset – seq
PURPOSE
Clears all of the user defined file and quick sequences.
See Sections 3.2.5 and 3.3.3.
3.4.4.5.5 Reset – cal
PURPOSE
Use caution with this reset as critical calibration data may be deleted.
This will clear the user calibrations information, which will affect the calibration of
the unit.
Clears the user defined reference pressure calibrations. Sets PA/PM to 0 and 1.
Clears the user defined barometer calibration. Sets PA/PM to 0 and 1.
Clears the PA(z)net and PA(z)tare values.
Reset the as received and as left user calibration values.
3.4.4.6 LEVEL
PURPOSE
To set user protection levels to deny access to certain functions and to edit the
password required for changing user levels.
PRINCIPLE
PPC2 AF's front panel user interface provides the means to access all PPC2 AF
data and functions including internal calibration data, special diagnostic functions
and privileged factory functions. Certain PPC2 AF functions, if used inadvertently
or by an unqualified operator may cause erroneous readings and behavior.
For these reasons, depending upon the application in which PPC2 AF 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. Three different levels of security are available. Once set up, changing
the security level requires password entry.
SECURITY LEVELS
The security levels are structured to support typical levels of operation 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 system diagnostic and maintenance functions.
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, from a metrological
standpoint, calibrations are all performed under the same conditions.
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