DH Instruments PPCK PLUS, Руководство по эксплуатации и обслуживанию

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PPCK+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc .
Page 66
The second selection <edit password>
displays the user password and allows it to
be edited. Passwords can be up to six
numbers in length and cannot start with
a zero.
Once a password has been entered, the user level cannot be changed without
reentering the password.
If <0> is entered, then the password is made inactive and the user will not be
required to enter a password to access the user level menu. This is the factory
default with a security level of
<2low> .
If there is an active password , the PPCK+
password entry screen will appear. The
user must enter the user defined password
or the factory
secondary password to
proceed any further:
The first field <
nnnn
> is the serial number of the PPCK+, 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 or forgotten. It can be obtained by contacting DHI
Customer Service. The factory secondary password is different for all PPCK+'s
and changes each time it is used.
3.4.4.7 ATM

PURPOSE
To view the value of atmospheric pressure as measured by the on-
board barometer.

PRINCIPLE
PPCK+ has an independent on-board barometer. The atmospheric pressure
measurements made by the on-board barometer are used only for dynamic
compensation of atmospheric pressure when using an absolute reference
pressure transducer to make gauge pressure measurements (see
Section 3.4.1, PRINCIPLE).
The on-board barometer is a low accuracy sensor used only for measuring
changes in atmospheric pressure over short periods of time (see
Section 3.4.1, PRINCIPLE). PPCK+ measurement uncertainty does not depend on
the absolute uncertainty of the on-board barometer.
1change user level
2edit password
PPCK+ SN nnnn-xx
Password: pppppp