DH Instruments FPG8601, Руководство по эксплуатации и обслуживанию

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FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 64
ICON DESCRIPTION
[Lower Internal
Mass]
Lowers the internal calibration mass onto the measuring mechanism of the load cell.
The process takes approximately 10s. During this time, the FPG pressure is not valid.
When the mass is lowered, the load cell output will change by the weight of the internal
calibration mass. The calculated FPG pressure will also change accordingly. This is a
diagnostics tool only available in the advanced user level.
[Shut Down FPG]
This function should be used to vent all lubrication pressure from the lubricating volume.
Without lubrication pressure, the piston cannot be sensitive, therefore the FPG is
effectively shut down. Use this function prior to disassembling the FPG. The icon image
will change after the function is selected.
Always shutdown the FPG when it will not be used for an extended amount of time.
This will help to avoid contaminants between the piston and cylinder.
[Restart FPG]
Re-activate the FPG by setting the last used pressure measurement mode. The function
has the same effect as directly selecting a measurement mode. When the process is
complete, the lubricating volume is pressurized according to the measurement mode.
[Abort Run
Mode]
Abort is used to abort the active run mode and return to an idle state. The FPG pressure
is automatically vented and the bypass valve is opened as part of the abort process. Prior to
aborting, a message allows the abort to be canceled if the option was not selected intentionally.
When this function is selected during a test sequence, an option is available to resume
program control with the run monitor opposed to completely returning to an idle state.
The program control box close option X and the
[Run], [Exit]
option perform the same
function as the
[Abort Run Mode]
option when FPG Tools is in a run mode.
[Operation Abort]
This feature is enabled only when potentially long program functions are in progress.
This includes: zeroing, changing measurement mode, running an internal calibration,
purging and reading atmosphere. When this option is selected, only the current operation
is aborted, FPG Tools will remain in the current run mode.
The option is best used when a function is started that the system will not be able to
complete due to a setup error. Abort the operation, complete the necessary setup, and
then retry.
Aborting internal calibrations can leave the FPG in a state in which the internal
calibration mass is lowered and the calibration is complete. FPG Tools makes every
attempt to avoid this condition, however, repeated aborts by the user may result in
this condition. To abort the internal calibration, press the [Operation Abort] option
one time only.
6.4.3 VALVE CONTROL
FPG Tools automatically performs all necessary valve changes based on the requirements of
the current pressure measurement mode and the requested operation. Normal system
operation does not require understanding or use of any of the FPG internal valves. For quick
steps in diagnosing problem, FPG Tools
displays the state of the 16 supported valve drivers
in
Factory Mode
only. Valves 1 through 11 are used by the FPG on a regular basis.
Valves 13 to 16 are extra valves not needed in the general FPG/VLPC configuration. Refer
to Section 11.1 for information on the internal valves and their function. Click the number of
any of the desired valves to toggle its actuation state. A depressed button means the valve is
actuated while the normal state means the valve is in it’s normal state. There is typically a
small delay between the time the valve option is selected and the time the valve actually
changes state. The valve toolbar display is refreshed with the state of the valve only after the
state change occurs.
During normal system operation, FPG Tools performs all of the necessary valve
operations based on the pressure measurement mode and requested operation.
The ability to change valve states is provided for diagnostics purposes only.