DH Instruments MFC-CB, Руководство по эксплуатации и обслуживанию

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MFC-CB™ Operation and Maintenance Manual
©2001~2007 DH Instruments, a Fluke Company
Page 38
3.4.1.5 <5ALL>
 PURPOSE/OPERATION
Use special caution with this reset as critical calibration data may be altered.
To access Reset - All, press [SPECIAL] and select <1reset> , <5all> .
Reset - All returns MFC-CB to the original, as delivered factory condition (except
the user security level which is not affected by resets). Performs the SETS,
UNITS, MFC and CAL RESET functions. Also resets:
•
COM1 and COM2
Baud rate: 2 400
Parity: Even
Data bits:
7
Stop bits: 1
Terminating characters: <CR> , <LF>
•
IEEE-488 (GPIB)
Address: 10
Terminating characters:
<CR> , <LF>
3.4.2
<2LEVEL>
 PURPOSE
To set user protection levels that restrict access to certain functions and to edit the
password required for changing user levels.
 PRINCIPLE
MFC-CB’s front panel user interface provides the means to access all MFC-CB 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 MFC-CB is
being used, it may be desirable to restrict access to certain functions. The USER LEVEL
function makes this possible. 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 MFC-CB settings.