DH Instruments FPG8601 Скачать руководство пользователя страница 77

Страница: 77 / 166

6. FPG TOOLS

Page 65

Changing valves manually can place the FPG in an unstable situation possibly causing a

system overpressure or forcing the lubrication pressure back into the lubricating volume.

Manual valve operation is provided for diagnostics purposes only and requires a thorough
understanding of the function of each valve in the system. Most invalid valve

configurations can be remedied by re-selecting the measurement mode.

Figure 27.

Manual Valve Control Toolbar

6.5

[RUN]

The

[Run]

menu contains options related to monitoring the output of the FPG. Use these options to put

FPG Tools into a run mode. When FPG Tools is not in a run mode, the program is considered to be idle.
This means the state of the FPG and VLPC are not being monitored by the program. There are three
basic run modes:

[Run Monitor],

[Run w/Point Log]

, and

[Run Test Sequence]

. Before entering any

of the run modes for the first time, the system must be initialized to synchronize FPG Tools with the states
of the FPG and VLPC.

To abort any run mode use the toolbar <Abort> option or any of the main program exit options.

The premise of a run mode is to put FPG Tools in a state in which the PC software behaves like a
common stand alone instrument with multiple discrete function keys. Use any of the control toolbars to
set pressures, change displays, change pressure units and measurement mode, log points (if supported)
or repeat data points (if supported). Most program configuration options can also be changed while in a
run mode. It is possible to create and use a new DUT or disable an active DUT without ever exiting a run
mode. Run modes themselves can be selected at any time without aborting the active run mode.

Run modes do not need to be aborted prior to making configuration changes or selecting a new
run mode. However, it is recommended that configuration changes should not take place after a run

mode is selected that uses data acquisition. These changes will not be reflected in the data file.

The normal state of the FPG internal valves are set up to put the FPG into gauge mode with the system
properly lubricated when power is turned off. This is a safe condition that should occur immediately
following a power up. However, improper connections or pressure supplies can prevent this safe
condition. As a result, it is good practice to always leave FPG Tools in a run mode when the FPG is set up.
This is the only means of determining the conditions of the FPG.

6.5.1

RUN MODE INITIALIZATION

Before FPG Tools can monitor the output of the FPG, the software must be initialized to set
the system to a known state. The initialization process must occur one time at the beginning
of the transition from an idle state to any run mode. After a run mode is entered, transitions
to other run modes do not require another initialization. FPG Tools automatically initializes
the system when required. While initialization is in progress, the

<Status Bar>

will display

information specific to the current step in the initialization process.

Do not abort operations that take place as part of the initialization process. If the FPG

is not properly initialized, pressure will not be calculated.