FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company
Page 90
6.7.6
<CYCLE> TAB
Use the
<Cycle>
tab to set up pre-test pressure exercising of the system. The maximum
pressure is set followed by the minimum pressure, for the number of cycles chosen.
This cycling occurs one time at the beginning of the test regardless of the number of
<Test Cycles>
selected. No data is logged related to the pressure cycle. Cycling pressure
is required for good measurement on some DUT's. It can also be used to purge N2 from a
DUT prior to starting a test. Fine pressure control is typically not important in this process.
Therefore, the hold limit should be relatively large compared to the hold limit used for actual
test points. Check the
<Run pressure cycle>
option and fill in the cycle information to run a
pressure cycle at the beginning of a test sequence.
Figure 45.
Test
Definition Editor,
<Cycle>
Tab
Table 33 describes each of the options on the
<Cycle>
tab.
Table 33.
Test Sequence Editor,
<Cycle>
Tab Fields
FEATURE
DESCRIPTION
Run pressure
cycle
(check box)
Check this option to run a pressure cycle at the beginning of a test sequence.
Minimum Set
Pressure
(numeric entry field)
Enter the minimum cycle pressure in the units specified by the
<Test Point Type>
field on
the
<Points>
tab. Typically this field should be set to the minimum pressure value of the
DUT.
Maximum Set
Pressure
(numeric entry field)
Enter the maximum cycle pressure in the units specified by the
<Test Point Type>
field on
the
<Points>
tab. Typically this field should be set to the maximum pressure value of the
DUT.
Number of cycles
(numeric entry field)
The number of times to set both the minimum and maximum pressures. At least 1 cycle
must be specified.
Set pressure hold
limit
(numeric entry field)
The hold limit as a percentage of the current VLPC range to apply to the minimum and
maximum pressure target values during the pressure cycle. When the pressure cycle is
complete, the hold limit is set to the value specified on the
<Control>
tab. Enter 0 to use
the default hold limit.
Set pressure
timeout
(numeric entry field)
The maximum amount of time FPG Tools should allow to set the minimum or maximum
pressure cycle pressures. If a ready condition is not met by this time, the next step
automatically continues as though the pressure were set properly.
