PPC2 AF OPERATION AND MAINTENANCE MANUAL
© 1998 DH Instruments, Inc. Page 52
If '0' is entered, then the password is made inactive and the user will not be
required to enter a password to get into the user level menu. This is the factory
default with a security level of 1none.
If there is an active password, the PPC2 AF
password entry screen will appear. The
user must enter the user defined
password or the factory secondary
password before proceeding any further:
PPC2 AF SN#nnnn-xx
Password: pppppp
The first field "nnnn" is the serial number of the PPC2 AF, followed by a second
field "xx" that represents the number of times that a secondary password has
been used. This second field increments each time a secondary password is
used. The third field is where the user enters the password.
The factory secondary password is available in case the user's password has
been misplaced. It can be obtained by contacting Customer Service. The
factory secondary
password is different for all PPC2 AF's and changes each
time it is used.
Once the correct user or secondary
password is entered, the User Level
menu will appear:
1change user level
2edit password
The first selection "change user level" will
bring up the "restriction" menu:
Restriction: 1none
2low 3medium 4high
You can then select the current restriction
level, or ESC back to the RUN screen.
Password: pppppp
0 disables password
The second selection "edit password" displays the user password and allows it to
be edited.
If '0' is entered, then the password is made inactive and the user will not be
required to enter a password to get into the user level menu. This is the factory
default with a security level of 1none.
3.4.4.7 ATM
PURPOSE
To view the current atmospheric pressure measurement made by the barometer
board atmospheric sensor.
PRINCIPLE
PPC2 AF has an independent barometric sensing board. The atmospheric
pressure measurements made by the barometer board are used only for dynamic
compensation of atmospheric pressure when using an absolute reference
pressure transducer to make gauge pressure measurements. Thus, the
barometer board is used only to measure changes in atmospheric pressure
between opportunities to measure atmospheric pressure directly with the
reference pressure transducers.
See Section 1.2.6.
OPERATION
To view the current reading of the barometer board press 7Atm under 4Internal of
the SPECIAL menu. The display is in the current pressure units in absolute
measure mode.
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