Furness controls FCO770, Руководство пользователя

Страница: 56 / 101

Page 56 FCO770 Users Guide Issue 1
C
C
o
o
a
a
r
r
s
s
e
e
L
L
e
e
a
a
k
k
t
t
e
e
s
s
t
t
p
p
a
a
r
r
a
a
m
m
e
e
t
t
e
e
r
r
s
s
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 is still checked at
the end of the fill time to ensure a valid test.
•
Options: No, Yes
CHECK FILL PRESSURE
•
Disable or enable pressure tolerance checking at the end of the fill time. This is
normally enabled to ensure a valid test but may be disabled if the flow rate is too high
to maintain the pressure.
•
Options: No, Yes
END ON FAIL
•
Coarse Leak tests normally test against the fail levels at the end of the test time. This
feature enables testing against the fail levels during the test time: the test will end
immediately if the test fails.
•
Options: No, Yes
PREFILL PRESSURE
•
Only used with auto prefill and only displayed if auto prefill is used.
•
This is used to detect when to stop filling. Tolerance checking at standby must be
disabled for auto prefill.