FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company
Page 68
6.6
[CONFIG]
All changes to the setup of FPG Tools are managed by the options in the
[Config]
menu. The different
types of configuration changes are segregated into the categories:
[Settings]
,
[System Setup]
,
[FPG
Calibration Setup]
,
[Internal Limits]
,
[Test Sequence Editor]
,
[DUT Editor]
and
[DUT Definition]
.
Access to many of the configuration options can be limited by the
[User Level]
feature. The following
sections detail each configuration option.
6.6.1
[SETTINGS]
The
[Settings]
options are always enabled for use regardless of the current run mode or
user level. When any run mode with data acquisition is enabled, it is recommended that
these settings not be changed to avoid inconsistent results. The state of each parameter is
logged in the data file at the beginning of the run mode. Changes in the parameters may
have an impact on the data but will not be directly reflected in the data file.
Figure 28. <Settings>
Table 15.
System Settings
LABEL
DESCRIPTION
Pressure Head
(cm)
(entry field)
The height difference in cm from the DUT to the reference level of the FPG. The FPG
reference level is slightly above the center of the mounting post (see Section 2.6.1). The
convention is to use a negative height value when the DUT is below the reference level
and a positive height when the DUT is above the reference level. The calculated head
correction is logged for each point when a data acquisition run mode is active.
Stability Setting
(%current range)
(entry field)
A rate of change of pressure per second limit used to determine a ready condition when
automatic VLPC pressure control is not active. If the rate of change of FPG pressure
exceeds this limit, the
<Ready Indicator>
on the
<Run Display>
is set to red for “Not
Ready”.
The value must be entered as a percentage of the current system range. The range is
typically the range of the VLPC when it is active. Otherwise, the range is 10 kPa.
Hold Setting
(%current range)
(entry field)
A symmetrical positive and negative limit around the target pressure within which the
controlled pressure is to be maintained. If the controlled pressure deviates from this limit
the
<Ready Indicator>
is set to red for “Not Ready” (see Section 3.6).
The value must be entered as a percentage of the current system range. The range is
typically the range of the VLPC when it is active. Otherwise, the range is 10 kPa.
FPG Pressure
display
resolution
(drop down list)
When the
<Use default pressure resolution>
option is not checked, this field determines
the number of digits to display in the FPG (and DUT) pressures. The formatting is applied
to the pressure in the currently selected pressure unit. New pressure unit selections will
have no bearing on the resolution displayed.
Use default
pressure
resolution
(check box)
When this option is checked, FPG Tools uses default display resolution based on the
pressure unit selected. User defined units may not display an appropriate amount of
pressure resolution (see Section 6.9.1). In this case, uncheck the option and make and
appropriate resolution selection.
