PG7000™ OPERATION AND MAINTENANCE MANUAL
© 1998-2008 DH Instruments, a Fluke Company
Page 32
2.4.9
CHECK AUTOMATED PRESSURE GENERATION (IF PRESENT)
Before applying pressure to the PG7000 system, be sure that all pressure vessels and
connections are rated for the pressure levels that will be applied and that all connections have
been properly tightened.
To check automated pressure generation/control:
Verify that the automated pressure generation/control component is properly connected
to the system (see Section 2.3.1.2).
When operation has returned to the main run screen, turn ON automated pressure generation
control, if available, by pressing
[GEN]
and selecting
<1on>
(see Section 3.9.9).
Press
[P
OR
M]
,
<1pressure>
to select
pressure entry mode
(see Section 3.9.12). Press
[ENTER]
and enter a pressure value to be generated and follow the mass loading
instruction (see Section 3.6).
Verify the pressure generation/control component properly generates pressure and floats
the PG7000 piston.
2.4.10
CHECK/SET SECURITY LEVEL
PG7000 has a security system based on User Levels. By default, the security system is set
to
low
and NO password is required to change the security level. See Section 3.11.4.5 for
information on the security system. As part of the PG7000 startup, set your desired security
level and a password.
PG7000 is delivered with the security level set to low to avoid inadvertent altering of
critical internal settings but with access to changing security levels unrestricted. It is
recommended that the low security level be maintained at all times and password protection be
implemented if control over setting of security levels is desired.
2.4.11
ADDITIONAL PRECAUTIONS TO TAKE BEFORE MAKING
PRESSURE MEASUREMENTS
Before using PG7000 to make accurate pressure measurements, consider the following:
•
Select/activate the correct piston-cylinder module, mass set and mass loading bell
(see Sections 3.9.2, 3.11.1.10, 3.11.1.15).
•
If using an automated pressure generation/control component with automated pressure
generation, set the pressure controller’s upper limit (UL) (see Section 3.9.9.3).
•
Enter the correct value of local gravity at the site of use (see Section 3.11.6).
•
Consider head corrections (see Sections 3.9.7 and 3.11.3).
•
Level the PG7000 Platform properly (see Section 2.3.1.1).
•
Select the correct pressure unit of measure and measurement mode (see Sections 3.9.3
and 3.9.5).
•
Verify that the settings for the sources of variables to be used by PG7000 in its
calculations of reference pressures are those desired (see Section 3.10).
