Furness controls FCO770, Руководство пользователя, Страница: 48 / 101

Page 48 FCO770 Users Guide Issue 1
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PRESSURE UNITS
•
Choose the engineering units for the pressure display. See the specification table on
page 96 for available units.
AUTO PREFILL
•
Only displayed if prefill is enabled in the Global Settings menu.
•
The auto prefill function is useful where the test item is slow to fill or has a restriction
in the fill path. It may also be used as a cost-effective way of testing at different
pressures without manual adjustment or an auto-regulator.
•
Options:
o
NO : auto prefill is not used.
o
INT : auto prefill uses the standard internal fill valve to fill the test item.
o
EXT : auto prefill uses an external valve to fill the test item. The valve should
be operated by the prefill stage output.
REGULATOR 2
•
Selects the second internal regulator (if fitted), or an external regulator. Electrical or
pneumatic outputs may be programmed to select an external regulator.
•
Options:
o
NO : regulator 1 is used for the test.
o
YES : regulator 2 is used for the test
o
PREFILL : regulator 2 is used if auto prefill is enabled.
o
FILL : regulator 2 is used for the test.
CHECK STANDBY PRESSURE
•
Disable or enable pressure tolerance checking in standby. This is normally enabled,
but may be disabled for vacuum tests with air saving, or jigging configurations where
the test pressure is not applied in standby. The pressure tolerance may be checked at
the end of the fill time to ensure a valid test.
•
Options: No, Yes
PRESSURE CORRECTION
•
Pressure correction may be enabled to help compensate for variations in fill pressure
to give a more sensitive test. When this is enabled the pressure value displayed during
test will be the compensated value. Pressure correction should be disabled if it
necessary to display the actual pressure rather than a compensated value.
•
Options: No, Yes.
CONTINUOUS FILL
•
When this is enabled the fill valve remains active during the test time. This allows a
back-pressure test to be performed in cases where the flow is too high for the
blockage test to discriminate adequately when the pressure source is removed.
•
Options: No, Yes.